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1

Luminous Efficacy Standards for General Purpose Lights  

Energy.gov (U.S. Department of Energy (DOE))

Assembly Bill 178, adopted in June 2007, established efficacy* standards for general purpose lights sold in the state of Nevada. The bill set the required efficacy at 25 lumens per watt (lm/W) of...

2

Spectral optimization of color temperature tunable white LEDs with excellent color rendering and luminous efficacy  

Science Journals Connector (OSTI)

The optimization model of limited luminous efficacy (LLE) for correlated color temperature (CCT) tunable phosphor-coated white light-emitting diodes (pc-W LEDs) consisting of blue...

He, Guoxing; Tang, Ju

2014-01-01T23:59:59.000Z

3

A simple evaluation of global and diffuse Luminous Efficacy for all sky conditions in tropical and humid climate  

E-Print Network (OSTI)

reason that prompts us to study these luminous efficacy values is that simulation software for buildings introduced in the software enables illuminance values simulation using solar irradiance databases. Firstly obtained are used in CODYRUN 2 simulation software for predicted illuminance values in Reunion Island. 2

Boyer, Edmond

4

Luminant Energy | Open Energy Information  

Open Energy Info (EERE)

Luminant Energy Luminant Energy Jump to: navigation, search Name Luminant Energy Place Texas Utility Id 56288 Utility Location Yes Ownership W ISO Ercot Yes Operates Generating Plant Yes Activity Generation Yes Activity Wholesale Marketing Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png No rate schedules available. Average Rates No Rates Available References ↑ "EIA Form EIA-861 Final Data File for 2010 - File1_a" Retrieved from "http://en.openei.org/w/index.php?title=Luminant_Energy&oldid=411015" Categories: EIA Utility Companies and Aliases Utility

5

Luminate LLC | Open Energy Information  

Open Energy Info (EERE)

Luminate LLC Luminate LLC Jump to: navigation, search Name Luminate, LLC Place Denver, Colorado Zip 80202 Sector Services Product Denver-based consultancy providing technical and management advisory services to companies active in the energy industry. They have specialist expertises in the biofuel industry. Coordinates 39.74001°, -104.992259° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.74001,"lon":-104.992259,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

6

Luminant restores pre-owned draglines  

SciTech Connect

Luminant, a Texas-based coal producer, brings two draglines back to life by moving and refurbishing them. 10 photos.

Donovan, A.

2009-11-15T23:59:59.000Z

7

Constancy of built-in luminance meter measurements in diagnostic displays  

SciTech Connect

Purpose: Liquid crystal displays used to interpret medical images are often equipped with built-in luminance meters to evaluate luminance response and Grayscale Standard Display Function conformance. This work evaluates agreement between luminance reported by the built-in meters and external measurements. Methods: The white level luminance was measured using a built-in meter and an external meter for 93 primary review workstations (Models MFGD 3420 and MDCG 3120-CB) with between 117 and 49?336 backlight hours (BLH). Measured luminance values were compared viat-test for displays with less than 25?000 BLH and those with more than 25?000 BLH. Bias between meters was also evaluated. Changes in luminance uniformity with increasing backlight hours were explored by determining the maximum luminance deviation (MLD) for subsets of these displays with less than 800 BLH and greater than 35?000 BLH. Results: The mean difference between built-in and external luminance measurements was 5.84% and 38.92% for displays with less than 25?000 and greater than 25?000 BLH, respectively, with a statistically significant difference in the means (p < 0.001). For displays with low BLH, a statistically significant bias was observed (p < 0.001) between built-in and external measurements. A high degree of correlation was observed between measurements made with two separate external meters (r = 0.999). The mean MLD was 9.5% and 11.2% for MDCG 3120-CB displays with less than 800 and greater than 35?000 BLH, respectively. The difference in the mean values was not statistically significant (p < 0.001). Conclusions: Disagreement between the white level luminance measured using the built-in and external meter increased with BLH. Consequently, reliance on values reported by the built-in luminance meter may result in a reduction in image contrast with time. Recommendations have been proposed regarding luminance response testing and corrective action for failing displays.

Silosky, M., E-mail: michael.silosky@ucdenver.edu; Marsh, R. M. [Department of Radiology, University of Colorado, School of Medicine Aurora, Colorado 80045 (United States)] [Department of Radiology, University of Colorado, School of Medicine Aurora, Colorado 80045 (United States)

2013-12-15T23:59:59.000Z

8

Constraining Emission Models of Luminous Blazar Sources  

SciTech Connect

Many luminous blazars which are associated with quasar-type active galactic nuclei display broad-band spectra characterized by a large luminosity ratio of their high-energy ({gamma}-ray) and low-energy (synchrotron) spectral components. This large ratio, reaching values up to 100, challenges the standard synchrotron self-Compton models by means of substantial departures from the minimum power condition. Luminous blazars have also typically very hard X-ray spectra, and those in turn seem to challenge hadronic scenarios for the high energy blazar emission. As shown in this paper, no such problems are faced by the models which involve Comptonization of radiation provided by a broad-line-region, or dusty molecular torus. The lack or weakness of bulk Compton and Klein-Nishina features indicated by the presently available data favors production of {gamma}-rays via up-scattering of infrared photons from hot dust. This implies that the blazar emission zone is located at parsec-scale distances from the nucleus, and as such is possibly associated with the extended, quasi-stationary reconfinement shocks formed in relativistic outflows. This scenario predicts characteristic timescales for flux changes in luminous blazars to be days/weeks, consistent with the variability patterns observed in such systems at infrared, optical and {gamma}-ray frequencies. We also propose that the parsec-scale blazar activity can be occasionally accompanied by dissipative events taking place at sub-parsec distances and powered by internal shocks and/or reconnection of magnetic fields. These could account for the multiwavelength intra-day flares occasionally observed in powerful blazars sources.

Sikora, Marek; /Warsaw, Copernicus Astron. Ctr.; Stawarz, Lukasz; /Kipac, Menlo Park /Jagiellonian U., Astron. Observ. /SLAC; Moderski, Rafal; Nalewajko, Krzysztof; /Warsaw, Copernicus Astron. Ctr.; Madejski, Greg; /KIPAC, Menlo Park /SLAC

2009-10-30T23:59:59.000Z

9

What are the Luminous Compact Blue Galaxies?  

E-Print Network (OSTI)

Luminous Compact Blue Galaxies (LCBGs) are common at z~1, contributing significantly to the total star formation rate density. By z~0, they are a factor of ten rarer. While we know that LCBGs evolve rapidly, we do not know what drives their evolution nor into what types of galaxies they evolve. We present the results of a single-dish HI survey of local LCBGs undertaken to address these questions. Our results indicate that LCBGs have M(HI) and M(DYN) consistent with low-mass spirals, but typically exhaust their gas reservoirs in less than 2 Gyr. Overall, the properties of LCBGs are consistent with them evolving into high-mass dwarf elliptical or dwarf irregular galaxies or low-mass, late-type spiral galaxies.

D. J. Pisano; C. A. Garland; R. Guzman; J. Perez Gallego; F. J. Castander; N. Gruel

2007-12-07T23:59:59.000Z

10

Internal Kinematics of Luminous Compact Blue Galaxies  

E-Print Network (OSTI)

We describe the dynamical properties which may be inferred from HST/STIS spectroscopic observations of luminous compact blue galaxies (LCBGs) between 0.1

Matthew A. Bershady; M. Vils; C. Hoyos; R. Guzman; D. C. Koo

2004-11-22T23:59:59.000Z

11

Introduction Luminance and Chrominance High Frequency Content References Smoke Detection in Stationary Video Using  

E-Print Network (OSTI)

frequency energy measurements #12;Introduction Luminance and Chrominance High Frequency Content References #12;Introduction Luminance and Chrominance High Frequency Content References Theory Energy Frequency Content References Application VIDEO: Luminance vs. Chrominance Energy Ratio: #12;Introduction

Knaust, Helmut

12

Evaluation of expanded uncertainties in luminous intensity and illuminance calibrations  

SciTech Connect

Detector-based calibrating methods and expressions for calculation of photometric uncertainties related to uncertainties in the calibrations of luminous intensity of a light source, illuminance responsivity of a photometer head, and calibration factors of an illuminance meter are discussed. These methods permit luminous intensity calibrations of incandescent light sources, luminous responsivity calibrations of photometer heads, and calibration factors of illuminance meters to be carried out with relative expanded uncertainties (with a level of confidence of 95.45%) of 0.4%, 0.4%, and 0.6%, respectively.

Sametoglu, Ferhat

2008-11-01T23:59:59.000Z

13

On the state of low luminous accreting neutron stars  

E-Print Network (OSTI)

Observational appearance of a neutron star in the subsonic propeller state which is a companion of a wind-fed mass-exchange close binary system is discussed. During the subsonic propeller state the neutron star magnetosphere is surrounded by a spherical quasi-static plasma envelope, which is extended from the magnetospheric boundary up to the star accretion radius. The energy input to the envelope due to the propeller action by the neutron star exceeds the radiative losses and the plasma temperature in the envelope is of the order of the free-fall temperature. Under this condition the magnetospheric boundary is interchange stable. Nevertheless, I find that the rate of plasma penetration from the envelope into the magnetic field of the neutron star due to diffusion and magnetic field line reconnection processes is large enough for the accretion power to dominate the spindown power. I show that the accretion luminosity of the neutron star in the subsonic propeller state is 5*10**{30} - 10**{33} (dM/dt)_{15} erg/s, where dM/dt is the strength of the normal companion stellar wind which is parametrized in terms of the maximum possible mass accretion rate onto the neutron star magnetosphere. On this basis I suggest that neutron stars in the subsonic propeller state are expected to be observed as low luminous accretion-powered pulsars. The magnetospheric radius of the neutron star in this state is determined by the strength of the stellar wind, (dM/dt)_c, while the accretion luminosity is determined by the rate of plasma penetration into the star magnetosphere, (dM/dt)_a, which is (dM/dt)_a << (dM/dt)_c. That is why the classification of the neutron star state in these objects using the steady accretion model (i.e. setting (dM/dt)_a = (dM/dt)_c) can lead to a mistaken conclusion.

Nazar Ikhsanov

2001-06-26T23:59:59.000Z

14

Nonlinear optics at maximum coherence  

Science Journals Connector (OSTI)

...D. Walls Nonlinear optics at maximum coherence S. E. Harris G. Y. Yin M. Jain H...optical processes which utilize maximum coherence of a non-allowed transition. The nonlinear...frequency. Nonlinear optics at maximum coherence B y S. E. Harris, G. Y. Yin, M...

1997-01-01T23:59:59.000Z

15

MaximumLetThrough.PDF  

NLE Websites -- All DOE Office Websites (Extended Search)

9 9 Maximum Let-Through Currents in the APS Storage Ring Quadrupole, Sextupole, and Corrector Magnets J. Carwardine, D. McGhee, G. Markovich May 18, 1999 Abstract Limits are described for the maximum magnet currents, under specified fault conditions, for the storage ring quadrupole, sextupole, and corrector magnets. Introduction In computing the maximum let-through current for the magnets for the storage ring, several factors must be considered. In general, the maximum current likely to occur even under fault conditions is less than the maximum theoretical DC current given the magnet resistance and the maximum available DC voltage. The first level of protection against magnet current overloads is the over-current interlock that is built into the converter electronics package. The threshold is set to approximately 110% of

16

On the maximum value of the cosmic abundance of oxygen and the oxygen yield  

E-Print Network (OSTI)

We search for the maximum oxygen abundance in spiral galaxies. Because this maximum value is expected to occur in the centers of the most luminous galaxies, we have constructed the luminosity - central metallicity diagram for spiral galaxies, based on a large compilation of existing data on oxygen abundances of HII regions in spiral galaxies. We found that this diagram shows a plateau at high luminosities (-22.3 oxygen abundance 12+log(O/H) ~ 8.87. This provides strong evidence that the oxygen abundance in the centers of the most luminous metal-rich galaxies reaches the maximum attainable value of oxygen abundance. Since some fraction of the oxygen (about 0.08 dex) is expected to be locked into dust grains, the maximum value of the true gas+dust oxygen abundance in spiral galaxies is 12+log(O/H) ~ 8.95. This value is a factor of ~ 2 higher than the recently estimated solar value. Based on the derived maximum oxygen abundance in galaxies, we found the oxygen yield to be about 0.0035, depending on the fraction of oxygen incorporated into dust grains.

L. S. Pilyugin; T. X. Thuan; J. M. Vilchez

2007-01-11T23:59:59.000Z

17

Single ion heat engine with maximum efficiency at maximum power  

E-Print Network (OSTI)

We propose an experimental scheme to realize a nano heat engine with a single ion. An Otto cycle may be implemented by confining the ion in a linear Paul trap with tapered geometry and coupling it to engineered laser reservoirs. The quantum efficiency at maximum power is analytically determined in various regimes. Moreover, Monte Carlo simulations of the engine are performed that demonstrate its feasibility and its ability to operate at maximum efficiency of 30% under realistic conditions.

Obinna Abah; Johannes Rossnagel; Georg Jacob; Sebastian Deffner; Ferdinand Schmidt-Kaler; Kilian Singer; Eric Lutz

2012-05-07T23:59:59.000Z

18

Clustering of Meter-wave Luminous Objects toward Monoceros  

E-Print Network (OSTI)

A distribution of the meter-wave luminous objects, which are bright at frequency 74 MHz (a wavelength of 4 m) but not detectable at 1.4 GHz (21 cm) in the VLA surveys, shows a notable concentration in a scale of a few degrees toward Monoceros [(l, b)=(225, 4)]. We argue that it is a part of giant radio relics associated with a nearby cluster of galaxies with cz~2400$ km s^{-1} centered on the spiral galaxy NGC 2377. The angular separation of these objects from the clustering center is consistent with the separation of distant relics to the cluster center if scaled by distance. This fact implies that the concentrations of meter-wave luminous objects can be used as a tracer of the structure of the Local Supercluster and it's vicinity.

Shuji Deguchi; Kazutaka Koike

2008-11-19T23:59:59.000Z

19

INFRARED CLASSIFICATION AND LUMINOSITIES FOR DUSTY ACTIVE GALACTIC NUCLEI AND THE MOST LUMINOUS QUASARS  

SciTech Connect

Mid-infrared spectroscopic measurements from the Infrared Spectrometer (IRS) on Spitzer are given for 125 hard X-ray active galactic nuclei (AGNs; 14-195 keV) from the Swift Burst Alert Telescope (BAT) sample and for 32 AGNs with black hole masses (BHMs) from reverberation mapping. The 9.7 {mu}m silicate feature in emission or absorption defines an infrared AGN classification describing whether AGNs are observed through dust clouds, indicating that 55% of the BAT AGNs are observed through dust. The mid-infrared dust continuum luminosity is shown to be an excellent indicator of intrinsic AGN luminosity, scaling closely with the hard X-ray luminosity, log {nu}L{sub {nu}}(7.8 {mu}m)/L(X) = -0.31 {+-} 0.35, and independent of classification determined from silicate emission or absorption. Dust luminosity scales closely with BHM, log {nu}L{sub {nu}}(7.8 {mu}m) = (37.2 {+-} 0.5) + 0.87 log BHM for luminosity in erg s{sup -1} and BHM in M{sub Sun }. The 100 most luminous type 1 quasars as measured in {nu}L{sub {nu}}(7.8 {mu}m) are found by comparing Sloan Digital Sky Survey (SDSS) optically discovered quasars with photometry at 22 {mu}m from the Wide-Field Infrared Survey Explorer (WISE), scaled to rest frame 7.8 {mu}m using an empirical template determined from IRS spectra. The most luminous SDSS/WISE quasars have the same maximum infrared luminosities for all 1.5 < z < 5, reaching total infrared luminosity L{sub IR} = 10{sup 14.4} L{sub Sun }. Comparing with dust-obscured galaxies from Spitzer and WISE surveys, we find no evidence of hyperluminous obscured quasars whose maximum infrared luminosities exceed the maximum infrared luminosities of optically discovered quasars. Bolometric luminosities L{sub bol} estimated from rest-frame optical or ultraviolet luminosities are compared to L{sub IR}. For the local AGN, the median log L{sub IR}/L{sub bol} = -0.35, consistent with a covering factor of 45% for the absorbing dust clouds. For the SDSS/WISE quasars, the median log L{sub IR}/L{sub bol} = 0.1, with extremes indicating that ultraviolet-derived L{sub bol} can be seriously underestimated even for type 1 quasars.

Weedman, Daniel; Sargsyan, Lusine; Houck, James; Barry, Donald [Astronomy Department, Cornell University, Ithaca, NY 14853 (United States); Lebouteiller, Vianney, E-mail: dweedman@isc.astro.cornell.edu [Laboratoire AIM, CEA/DSM-CNRS-Universite Paris Diderot, DAPNIA/Service d'Astrophysique, Saclay, F-91191 Gif-sur-Yvette Cedex (France)

2012-12-20T23:59:59.000Z

20

A LUMINOUS AND FAST-EXPANDING TYPE Ib SUPERNOVA SN 2012au  

SciTech Connect

We present a set of photometric and spectroscopic observations of a bright Type Ib supernova SN 2012au from -6 days until {approx} + 150 days after maximum. The shape of its early R-band light curve is similar to that of an average Type Ib/c supernova. The peak absolute magnitude is M{sub R} = -18.7 {+-} 0.2 mag, which suggests that this supernova belongs to a very luminous group among Type Ib supernovae. The line velocity of He I {lambda}5876 is about 15,000 km s{sup -1} around maximum, which is much faster than that in a typical Type Ib supernova. From the quasi-bolometric peak luminosity of (6.7 {+-} 1.3) Multiplication-Sign 10{sup 42} erg s{sup -1}, we estimate the {sup 56}Ni mass produced during the explosion as {approx}0.30 M{sub Sun }. We also give a rough constraint to the ejecta mass 5-7 M{sub Sun} and the kinetic energy (7-18) Multiplication-Sign 10{sup 51} erg. We find a weak correlation between the peak absolute magnitude and He I velocity among Type Ib SNe. The similarities to SN 1998bw in the density structure inferred from the light-curve model as well as the large peak bolometric luminosity suggest that SN 2012au had properties similar to energetic Type Ic supernovae.

Takaki, Katsutoshi; Fukazawa, Yasushi; Itoh, Ryosuke; Ueno, Issei; Ui, Takahiro; Urano, Takeshi [Department of Physical Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526 (Japan); Kawabata, Koji S.; Akitaya, Hiroshi; Moritani, Yuki; Ohsugi, Takashi; Uemura, Makoto; Yoshida, Michitoshi [Hiroshima Astrophysical Science Center, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526 (Japan); Yamanaka, Masayuki [Kwasan Observatory, Kyoto University, Ohmine-cho Kita Kazan, Yamashina-ku, Kyoto 607-8471 (Japan); Maeda, Keiichi; Nomoto, Ken'ichi [Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 (Japan); Tanaka, Masaomi [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Kinugasa, Kenzo [Nobeyama Radio Observatory, National Astronomical Observatory of Japan, 462-2 Nobeyama, Minamimaki, Nagano 384-1305 (Japan); Sasada, Mahito, E-mail: takaki@hep01.hepl.hiroshima-u.ac.jp [Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502 (Japan)

2013-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

DOE - Office of Legacy Management -- Shannon Luminous Metals Co - CA 0-03  

NLE Websites -- All DOE Office Websites (Extended Search)

Shannon Luminous Metals Co - CA Shannon Luminous Metals Co - CA 0-03 FUSRAP Considered Sites Site: SHANNON LUMINOUS METALS CO. (CA.0-03 ) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: Shannon Luminous Metals CA.0-03-3 Location: 7356 Santa Monica Blvd. , Hollywood , California CA.0-03-1 Evaluation Year: 1987 CA.0-03-2 Site Operations: Research and development of uranium use in luminous paint pigments in the 1950s. CA.0-03-1 Site Disposition: Eliminated - No Authority - NRC licensed CA.0-03-3 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium CA.0-03-1 Radiological Survey(s): No Site Status: Eliminated from consideration under FUSRAP Also see Documents Related to SHANNON LUMINOUS METALS CO. CA.0-03-1 - AEC Letter; Burman to Alburger; Subject: AEC License

22

A luminous, blue progenitor system for a type-Iax supernova  

E-Print Network (OSTI)

Type-Iax supernovae (SN Iax) are stellar explosions that are spectroscopically similar to some type-Ia supernovae (SN Ia) at maximum light, except with lower ejecta velocities. They are also distinguished by lower luminosities. At late times, their spectroscopic properties diverge from other SN, but their composition (dominated by iron-group and intermediate-mass elements) suggests a physical connection to normal SN Ia. These are not rare; SN Iax occur at a rate between 5 and 30% of the normal SN Ia rate. The leading models for SN Iax are thermonuclear explosions of accreting carbon-oxygen white dwarfs that do not completely unbind the star, implying they are "less successful" cousins of normal SN Ia, where complete disruption is observed. Here we report the detection of the luminous, blue progenitor system of the type-Iax SN 2012Z in deep pre-explosion imaging. Its luminosity, colors, environment, and similarity to the progenitor of the Galactic helium nova V445 Puppis, suggest that SN 2012Z was the explosio...

McCully, Curtis; Foley, Ryan J; Bildsten, Lars; Fong, Wen-fai; Kirshner, Robert P; Marion, G H; Riess, Adam G; Stritzinger, Maximilian D

2014-01-01T23:59:59.000Z

23

Long-term spectroscopic monitoring of the Luminous Blue Variable HD160529  

E-Print Network (OSTI)

We have spectroscopically monitored the galactic Luminous Blue Variable HD 160529 and obtained an extensive high-resolution data set that covers the years 1991 to 2002. During this period, the star evolved from an extended photometric minimum phase towards a new visual maximum. In several observing seasons, we covered up to four months with almost daily spectra. Our spectra typically cover most of the visual spectral range with a high spectral resolution (about 20,000 or more). This allows us to investigate the variability in many lines and on many time scales from days to years. We find a correlation between the photospheric HeI lines and the brightness of the star, both on a time scale of months and on a time scale of years. The short-term variations are smaller and do not follow the long-term trend, strongly suggesting different physical mechanisms. Metal lines also show both short-term and long-term variations in strength and also a long-term trend in radial velocity. Most of the line-profile variations can be attributed to changing strengths of lines. Propagating features in the line profiles are rarely observed. We find that the mass-loss rate of HD 160529 is almost independent of temperature, i.e. visual brightness.

Otmar Stahl; Thomas Gaeng; Chris Sterken; Andreas Kaufer; Thomas Rivinius; Thomas Szeifert; Bernhard Wolf

2002-12-20T23:59:59.000Z

24

Rapid Communication Orientation selectivity in luminance and color vision assessed using  

E-Print Network (OSTI)

Rapid Communication Orientation selectivity in luminance and color vision assessed using 2-d band orientation noise isolating the achromatic, red­green and blue­yellow mechanisms, and matched in multiples and boundaries primarily defined by luminance contrast (Livingstone & Hubel, 1987, 1988). For example, both red­green

Mullen, Kathy T.

25

Boiler Maximum Achievable Control Technology (MACT) Technical...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Boiler Maximum Achievable Control Technology (MACT) Technical Assistance - Fact Sheet, May 2014 Boiler Maximum Achievable Control Technology (MACT) Technical Assistance - Fact...

26

The pulsation modes, masses and evolution of luminous red giants  

E-Print Network (OSTI)

The period-luminosity sequences and the multiple periods of luminous red giant stars are examined using the OGLE III catalogue of long-period variables in the Large Magellanic Cloud. It is shown that the period ratios in individual multimode stars are systematically different from the ratios of the periods at a given luminosity of different period-luminosity sequences. This leads to the conclusion that the masses of stars at the same luminosity on the different period-luminosity sequences are different. An evolutionary scenario is used to show that the masses of stars on adjacent sequences differ by about 16-26% at a given luminosity, with the shorter period sequence being more massive. The mass is also shown to vary across each sequence by a similar percentage, with the mass increasing to shorter periods. On one sequence, sequence B, the mass distribution is shown to be bimodal. It is shown that the small amplitude variables on sequences A', A and B pulsate in radial and nonradial modes of angular degree l=0...

Wood, P R

2015-01-01T23:59:59.000Z

27

Mechanical feedback in the molecular ISM of luminous IR galaxies  

E-Print Network (OSTI)

Aims: Molecular emission lines originating in the nuclei of luminous infra-red galaxies are used to determine the physical properties of the nuclear ISM in these systems. Methods: A large observational database of molecular emission lines is compared with model predictions that include heating by UV and X-ray radiation, mechanical heating, and the effects of cosmic rays. Results: The observed line ratios and model predictions imply a separation of the observedsystems into three groups: XDRs, UV-dominated high-density (n>=10^5 cm-3) PDRs, and lower-density (n=10^4.5 cm-3) PDRs that are dominated by mechanical feedback. Conclusions: The division of the two types of PDRs follows naturally from the evolution of the star formation cycle of these sources, which evolves from deeply embedded young stars, resulting in high-density (n>=10^5 cm-3) PDRs, to a stage where the gas density has decreased (n=10^4.5 cm-3) and mechanical feedback from supernova shocks dominates the heating budget.

A. F. Loenen; M. Spaans; W. A. Baan; R. Meijerink

2008-08-20T23:59:59.000Z

28

The Neutral ISM in Nearby Luminous Compact Blue Galaxies  

E-Print Network (OSTI)

We observed 20 nearby Luminous Compact Blue Galaxies (LCBGs) in HI and CO(J=2-1) with the GBT and JCMT. These ~L^star galaxies are blue, high surface brightness, starbursting, high metallicity galaxies with an underlying older stellar population. They are common at z~1, but rare in the local Universe. It has been proposed that intermediate redshift LCBGs may be the progenitors of local dwarf ellipticals or low luminosity spirals, or that they may be more massive disks forming from the center outward to become L^star galaxies. To discriminate among various possible evolutionary scenarios, we have measured the dynamical masses and gas depletion time scales of this sample of nearby LCBGs. We find that local LCBGs span a wide range of dynamical masses, from 4 x 10^9 to 1 x 10^11 M_solar (measured within R_25). Molecular gas in local LCBGs is depleted quite quickly, in 30 to 200 million years. The molecular plus atomic gas is depleted in 30 million to 10 billion years; however, ~80% of the local LCBGs deplete their gas in less than 5 billion years. As LCBGs are heterogeneous in both dynamical mass and gas depletion time scales, they are not likely to evolve into one homogeneous galaxy class.

C. A. Garland; D. J. Pisano; J. P. Williams; R. Guzman; F. J. Castander

2003-10-30T23:59:59.000Z

29

AKARI NEAR-INFRARED SPECTROSCOPY OF LUMINOUS INFRARED GALAXIES  

SciTech Connect

We present the AKARI near-infrared (NIR; 2.5-5 {mu}m) spectroscopic study of 36 (ultra)luminous infrared galaxies ((U)LIRGs) at z = 0.01-0.4. We measure the NIR spectral features including the strengths of 3.3 {mu}m polycyclic aromatic hydrocarbon emission and hydrogen recombination lines (Br{alpha} and Br{beta}), optical depths at 3.1 and 3.4 {mu}m, and NIR continuum slope. These spectral features are used to identify optically elusive, buried active galactic nuclei (AGNs). We find that half of the (U)LIRGs optically classified as non-Seyferts show AGN signatures in their NIR spectra. Using a combined sample of (U)LIRGs with NIR spectra in the literature, we measure the contribution of buried AGNs to the infrared luminosity from the spectral energy distribution fitting to the IRAS photometry. The contribution of these buried AGNs to the infrared luminosity is 5%-10%, smaller than the typical AGN contribution of (U)LIRGs including Seyfert galaxies (10%-40%). We show that NIR continuum slopes correlate well with WISE [3.4]-[4.6] colors, which would be useful for identifying a large number of buried AGNs using the WISE data.

Lee, Jong Chul; Lee, Myung Gyoon [Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 151-742 (Korea, Republic of); Hwang, Ho Seong [CEA Saclay/Service d'Astrophysique, F-91191 Gif-sur-Yvette (France); Kim, Minjin; Lee, Joon Hyeop, E-mail: mglee@astro.snu.ac.kr, E-mail: jclee@kasi.re.kr, E-mail: mkim@kasi.re.kr, E-mail: jhl@kasi.re.kr, E-mail: hhwang@cfa.harvard.edu [Korea Astronomy and Space Science Institute, Daejeon 305-348 (Korea, Republic of)

2012-09-01T23:59:59.000Z

30

Adaptive optics imaging and optical spectroscopy of a multiple merger in a luminous infrared galaxy  

Science Journals Connector (OSTI)

......Engomi, 1516 Nicosia, Cyprus 6 Department of Astronomy...We detect outflowing gas from the Bird mostly in...source within a nearby gas-rich interacting LIRG...nearby, IR-luminous, gas-rich interacting system...using a V= 12.9 mag natural guide star 22 arcsec south-west......

P. Visnen; S. Mattila; A. Kniazev; A. Adamo; A. Efstathiou; D. Farrah; P. H. Johansson; G. stlin; D. A. H. Buckley; E. B. Burgh; L. Crause; Y. Hashimoto; P. Lira; N. Loaring; K. Nordsieck; E. Romero-Colmenero; S. Ryder; M. Still; A. Zijlstra

2008-03-01T23:59:59.000Z

31

MOLECULAR GAS IN LUMINOUS GALACTIC NUCLEI N. Z. SCOVILLE AND A. J. BAKER  

E-Print Network (OSTI)

MOLECULAR GAS IN LUMINOUS GALACTIC NUCLEI N. Z. SCOVILLE AND A. J. BAKER California Institute­wave interferometry has clearly shown the existence of enormous masses (10 9 \\Gamma 10 10 M fi ) of molecular gas. In these systems, molecular gas is an obvious source of fuel for nuclear starbursts and active galactic nuclei (AGN

Baker, Andrew J.

32

Interaction of luminance and higher-order statistics in texture discrimination  

E-Print Network (OSTI)

statistics; Markov random fields; Probability summation 1. Introduction Segregation of an image into regionsInteraction of luminance and higher-order statistics in texture discrimination Jonathan D. Victor a individual pixel statistics are varied and spatial correlations are absent (``IID textures''), or textures

California at Irvine, University of

33

Luminous Enteric Bacteria of Marine Fishes: a Study of Their Distribution, Densities, and Dispersion  

Science Journals Connector (OSTI)

...the Santa Barbara Basin, Calif. TABLE 2...Southern California Bight A. hemigymnus 4...105 to 106 times greater than the surrounding...concentrations of greater than 105 luminous...Southern California Bight (1977). We are...light organ of the Australian pinecone fish, Cleidopus...

E. G. Ruby; J. G. Morin

1979-09-01T23:59:59.000Z

34

Luminance: a New Visual Feature for Visual Christophe Collewet and Eric Marchand  

E-Print Network (OSTI)

Chapter 5 Luminance: a New Visual Feature for Visual Servoing Christophe Collewet and Eric Marchand and that no Christophe Collewet and Eric Marchand INRIA, Campus de Beaulieu, 35042 Rennes, France, e-mail: {christophe.collewet,eric. marchand}@inria.fr 73 inria-00548937,version1-20Dec2010 Author manuscript, published in "Visual Servoing

Boyer, Edmond

35

TURBULENT PRESSURE IN THE ENVELOPES OF YELLOW HYPERGIANTS AND LUMINOUS BLUE VARIABLES  

E-Print Network (OSTI)

turbulent pressure) affects the structure and stability of luminous post­red-supergiant stars is critically zone lies too deep below the surface to influence the formal dynamical stability or instability more than a huge bubble of blackbody radiation. Since radiation pressure tends to decrease stellar

36

Development of High Efficacy, Low Cost Phosphorescent Oled Lightning Luminaire  

SciTech Connect

In this two year program, UDC together with Armstrong World Industries, Professor Stephen Forrest (University of Michigan) and Professor Mark Thompson (University of Southern California) planned to develop and deliver high efficiency OLED lighting luminaires as part of an integrated ceiling illumination system that exceed the Department of Energy (DOE) 2010 performance projections. Specifically the UDC team in 2010 delivered two prototype OLED ceiling illumination systems, each consisting of four individual OLED lighting panels on glass integrated into Armstrong's novel TechZone open architecture ceiling systems, at an overall system efficacy of 51 lm/W, a CRI = 85 and a projected lifetime to 70% of initial luminance to exceed 10,000 hours. This accomplishment represents a 50% increase in luminaire efficacy and a factor of two in lifetime over that outlined in the solicitation. In addition, the team has also delivered one 15cm x 15cm lighting panel fabricated on a flexible metal foil substrate, demonstrating the possibility using OLEDs in a range of form factors. During this program, our Team has pursued the commercialization of these OLED based ceiling luminaires, with a goal to launch commercial products within the next three years. We have proven that our team is ideally suited to develop these highly novel and efficient solid state lighting luminaires, having both the technical experience and commercial strategy to leverage work performed under this contract. Our calculations show that the success of our program could lead to energy savings of more than 0.5 quads or 8 MMTC (million metric tons of carbon) per year by 2016.

Michael Hack

2010-07-09T23:59:59.000Z

37

Cell development obeys maximum Fisher information  

E-Print Network (OSTI)

Eukaryotic cell development has been optimized by natural selection to obey maximal intracellular flux of messenger proteins. This, in turn, implies maximum Fisher information on angular position about a target nuclear pore complex (NPR). The cell is simply modeled as spherical, with cell membrane (CM) diameter 10 micron and concentric nuclear membrane (NM) diameter 6 micron. The NM contains about 3000 nuclear pore complexes (NPCs). Development requires messenger ligands to travel from the CM-NPC-DNA target binding sites. Ligands acquire negative charge by phosphorylation, passing through the cytoplasm over Newtonian trajectories toward positively charged NPCs (utilizing positive nuclear localization sequences). The CM-NPC channel obeys maximized mean protein flux F and Fisher information I at the NPC, with first-order delta I = 0 and approximate 2nd-order delta I = 0 stability to environmental perturbations. Many of its predictions are confirmed, including the dominance of protein pathways of from 1-4 proteins, a 4nm size for the EGFR protein and the approximate flux value F =10^16 proteins/m2-s. After entering the nucleus, each protein ultimately delivers its ligand information to a DNA target site with maximum probability, i.e. maximum Kullback-Liebler entropy HKL. In a smoothness limit HKL approaches IDNA/2, so that the total CM-NPC-DNA channel obeys maximum Fisher I. Thus maximum information approaches non-equilibrium, one condition for life.

B. R. Frieden; R. A. Gatenby

2014-04-29T23:59:59.000Z

38

LED Record Efficacy and Brightness  

Energy.gov (U.S. Department of Energy (DOE))

Designed for general lighting applications such as street, industrial, and parking garage lighting, the Cree XLamp power LED sets new records for LED brightness and efficacy, up to 85 lm/W at 350 mA. The XLamp utilizes Cree's performance breakthrough EZBright LED chip; both products include technology that was developed in part with R&D funding support from DOE.

39

Notes on Frequentist, Maximum Likelihood & Bayesian Statistics  

E-Print Network (OSTI)

, theory, "gut feeling," etc. · Changes the probability distribution #12;Bayesian Statistics · ProbabilityNotes on Frequentist, Maximum Likelihood & Bayesian Statistics #12;Statistical Methods · Probability is a long-term frequency statement about the data ­ if repeated, what proportion of the time would

Ernest, Holly

40

PublicationsmailagreementNo.40014024 maximum depth  

E-Print Network (OSTI)

and a video camera to complete installation of the world's first regional cabled ocean observatory. NEPTUNE- tion systems that--using power and the internet--provide continuous, long-term monitoring of oceanPublicationsmailagreementNo.40014024 THE 2.7km maximum depth beneath the ocean surface of neptune

Pedersen, Tom

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Luminant's Big Brown Plant wins for continuous improvement and safety programs  

SciTech Connect

Staff from Luminant's Big Brown Plant accepted the PRB Coal Users' Group's top honour for innovative improvements to coal-handling systems and a sterling safety record. The numbers reveal their accomplishments: an average EFOR less than 4%, an availability factor averaging 90% for a plant that burns a lignite/PRB mix, and staff who worked more than 2.6 million man-hours since March 2000 without a lost-time injury. 13 photos., 1 tab.

Peltier, R.

2008-07-15T23:59:59.000Z

42

Design of maximum density aggregate grading  

Science Journals Connector (OSTI)

An aggregate grading that yields maximum solid density and maximum particle interlock is highly desirable for both bound mixtures, such as asphalt concrete and plain and reinforced concrete, and for unbound mixtures such as those used in base courses. Maximum particle interlock leads to high strength. Whereas minimum voids in a certain material composition is conducive to high strength and low compression. Aggregate grading may be obtained, for instance, from the ASTM, which is based on experience or may be designed according to Lees method. In the present work five different types of aggregates were used, each with a variety of chosen grading. It was found that Lees method produced the lowest porosity of all types of aggregates as well as for the various employed gradings. Lees rational method of aggregate grading, however, is a very lengthy and time-consuming procedure. Therefore, programming of Lees method is an essential step to make such an excellent method available to practicing engineers. A program named ratmix was developed and has incorporated 58 design graphs of the Lees method. ratmix is a comprehensive program for Lees rational method; it conducts interpolation for intermediate points within the design graphs as well as between graphs of different properties.

Yahia A Abdel-Jawad; Waddah Salman Abdullah

2002-01-01T23:59:59.000Z

43

Where Is My Stuff? Augmenting Finding and Re-finding Information by Spatial Locations and Icon Luminance  

Science Journals Connector (OSTI)

We studied how spatial locations and luminance affect finding and re-finding information in a desktop environment. In an experiment conducted with computer icons, fixed locations led to more frequent accesses to

J. Michelle Moon; Wai-Tat Fu

2009-01-01T23:59:59.000Z

44

Accelerated maximum likelihood parameter estimation for stochastic biochemical systems  

E-Print Network (OSTI)

as: Daigle et al. : Accelerated maximum likelihood parame-Gillespie DT: Approximate accelerated stochastic simulationARTICLE Open Access Accelerated maximum likelihood parameter

Daigle, Bernie J; Roh, Min K; Petzold, Linda R; Niemi, Jarad

2012-01-01T23:59:59.000Z

45

The Hybrid Maximum Principle is a consequence of Pontryagin ...  

E-Print Network (OSTI)

We give a simple proof of the Maximum Principle for smooth hybrid control sys- ... result in the study of such problems is Hybrid Maximum Principle proved in [4]...

2006-10-31T23:59:59.000Z

46

PROPERTIES OF NEWLY FORMED DUST GRAINS IN THE LUMINOUS TYPE IIn SUPERNOVA 2010jl  

SciTech Connect

Supernovae (SNe) have been proposed to be the main production sites of dust grains in the universe. However, our knowledge of their importance to dust production is limited by observationally poor constraints on the nature and amount of dust particles produced by individual SNe. In this paper, we present a spectrum covering optical through near-Infrared (NIR) light of the luminous Type IIn supernova 2010jl around one and a half years after the explosion. This unique data set reveals multiple signatures of newly formed dust particles. The NIR portion of the spectrum provides a rare example where thermal emission from newly formed hot dust grains is clearly detected. We determine the main population of the dust species to be carbon grains at a temperature of ?1350-1450 K at this epoch. The mass of the dust grains is derived to be ?(7.5-8.5) 10{sup 4} M{sub ?}. Hydrogen emission lines show wavelength-dependent absorption, which provides a good estimate of the typical size of the newly formed dust grains (?< 0.1 ?m, and most likely ?< 0.01 ?m). We believe the dust grains were formed in a dense cooling shell as a result of a strong SN-circumstellar media (CSM) interaction. The dust grains occupy ?10% of the emitting volume, suggesting an inhomogeneous, clumpy structure. The average CSM density must be ?> 3 10{sup 7} cm{sup 3}, corresponding to a mass loss rate of ?> 0.02 M{sub ?} yr{sup 1} (for a mass loss wind velocity of ?100 km s{sup 1}). This strongly supports a scenario in which SN 2010jl and probably other luminous SNe IIn are powered by strong interactions within very dense CSM, perhaps created by Luminous-Blue-Variable-like eruptions within the last century before the explosion.

Maeda, K.; Nozawa, T.; Folatelli, G.; Moriya, T. J.; Nomoto, K.; Bersten, M.; Quimby, R. [Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 (Japan); Sahu, D. K.; Anupama, G. C. [Indian Institute of Astrophysics, Koramangala, Bangalore 560 034 (India); Minowa, Y.; Pyo, T.-S. [Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720 (United States); Motohara, K.; Kitagawa, Y. [Institute of Astronomy, University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015 (Japan); Ueno, I.; Kawabata, K. S.; Yamanaka, M. [Hiroshima Astrophysical Science Center, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526 (Japan); Kozasa, T. [Department of Cosmosciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810 (Japan); Iye, M., E-mail: keiichi.maeda@ipmu.jp [National Astronomical Observatory, Mitaka, Tokyo (Japan)

2013-10-10T23:59:59.000Z

47

Maximum mass of magnetic white dwarfs  

E-Print Network (OSTI)

We revisit in this work the problem of the maximum masses of magnetized White Dwarfs (WD). The impact of a strong magnetic field onto the structure equations is addressed. The pressures become anisotropic due to the presence of the magnetic field and split into a parallel and perpendicular components. We first construct stable solutions of TOV equations for the parallel pressures, and found that physical solutions vanish for the perpendicular pressure when $B \\gtrsim 10^{13}$ G. This fact establishes an upper bound for a magnetic field and the stability of the configurations in the (quasi) spherical approximation. Our findings also indicate that it is not possible to obtain stable magnetized WD with super Chandrasekhar masses because the values of the magnetic field needed for them are higher than this bound. To proceed into the anisotropic regime, we derived structure equations appropriated for a cylindrical metric with anisotropic pressures. From the solutions of the structure equations in cylindrical symme...

Paret, D Manreza; Horvath, J E

2015-01-01T23:59:59.000Z

48

Critical insulation thickness for maximum entropy generation  

Science Journals Connector (OSTI)

Critical insulation thickness is known to refer to the insulation thickness that maximises the rate of heat transfer in cylindrical and spherical systems. The same analogy is extended to the rate of entropy generation in the present study. The possible critical insulation thickness that yields a maximum rate of entropy generation is investigated. Entropy generation is related to heat transfer through and temperature distribution within the insulation material. It is found that there exists a critical insulation thickness for maximising the rate of entropy generation that is a function of the Bi number and the surface to ambient temperature ratio. The solution of such critical thickness is formulated analytically for both cylindrical and spherical geometries. It is also found that the critical insulation thickness for the rate of entropy generation does not coincide with that for the rate of heat transfer.

Ahmet Z. Sahin

2012-01-01T23:59:59.000Z

49

Parameters of the Luminous Region Surrounding Deuterium Pellets in the Princeton Large Torus Tokamak  

Science Journals Connector (OSTI)

The luminous region of the plasma cloud surrounding deuterium pellets injected into a tokamak is studied spectroscopically. At the time of peak luminosity the electron density is 2.41017 cm-3 to within 30% and the temperature is at most 2.0 eV. The intensity ratio of the Balmer-alpha and -beta light from the pellets, the total number of emitted photons, and the apparent size of the radiating region are consistent with local thermodynamic equilibrium at this temperature and density.

D. H. McNeill; G. J. Greene; D. D. Schuresko

1985-09-23T23:59:59.000Z

50

Tunable sub-luminal propagation of narrowband x-ray pulses  

E-Print Network (OSTI)

Group velocity control is demonstrated for x-ray photons of 14.4 keV energy via a direct measurement of the temporal delay imposed on spectrally narrow x-ray pulses. Sub-luminal light propagation is achieved by inducing a steep positive linear dispersion in the optical response of ${}^{57}$Fe M\\"ossbauer nuclei embedded in a thin film planar x-ray cavity. The direct detection of the temporal pulse delay is enabled by generating frequency-tunable spectrally narrow x-ray pulses from broadband pulsed synchrotron radiation. Our theoretical model is in good agreement with the experimental data.

K. P. Heeg; J. Haber; D. Schumacher; L. Bocklage; H. -C. Wille; K. S. Schulze; R. Loetzsch; I. Uschmann; G. G. Paulus; R. Rffer; R. Rhlsberger; J. Evers

2014-09-01T23:59:59.000Z

51

The Diverse Properties of the Most Ultraviolet Luminous Galaxies Discovered by the Galaxy Evolution Explorer  

E-Print Network (OSTI)

We report on the properties of a sample of ultraviolet luminous galaxies (UVLGs) selected by matching the Galaxy Evolution Explorer (GALEX) Surveys with the Sloan Digital Sky Survey Third Data Release. Out of 25362 galaxies between 0.02x10^10 L_solar at 1530 Angstroms (observed wavelength). The properties of this population are well correlated with ultraviolet surface brightness. We find that the galaxies with low UV surface brightness are primarily large spiral systems with a mixture of old and young stellar populations, while the high surface brightness galaxies consist primarily of compact starburst systems. In terms of the behavior of surface brightness with luminosity, size with luminosity, the mass-metallicity relation, and other parameters, the compact UVLGs clearly depart from the trends established by the full sample of galaxies. The subset of compact UVLGs with the highest surface brightness (``supercompact UVLGs'') have characteristics that are remarkably similar to Lyman Break Galaxies at higher redshift. They are much more luminous than typical local ultraviolet-bright starburst galaxies and blue compact dwarf galaxies. They have metallicities that are systematically lower than normal galaxies of the same stellar mass, indicating that they are less chemically evolved. In all these respects, they are the best local analogs for Lyman Break Galaxies.

Charles G. Hoopes; Timothy M. Heckman; Samir Salim; Mark Seibert; Christy A. Tremonti; David Schiminovich; R. Michael Rich; D. Christopher Martin; Stephane Charlot; Guinevere Kauffmann; Karl Forster; Peter G. Friedman; Patrick Morrissey; Susan G. Neff; Todd Small; Ted K. Wyder; Luciana Bianchi; Jose Donas; Young-Wook Lee; Barry F. Madore; Bruno Milliard; Alex S. Szalay; Barry Y. Welsh; Sukyoung K. Yi

2007-10-23T23:59:59.000Z

52

COMPLEX RADIO SPECTRAL ENERGY DISTRIBUTIONS IN LUMINOUS AND ULTRALUMINOUS INFRARED GALAXIES  

SciTech Connect

We use the Expanded Very Large Array to image radio continuum emission from local luminous and ultraluminous infrared galaxies (LIRGs and ULIRGs) in 1 GHz windows centered at 4.7, 7.2, 29, and 36 GHz. This allows us to probe the integrated radio spectral energy distribution (SED) of the most energetic galaxies in the local universe. The 4-8 GHz flux densities agree well with previous measurements. They yield spectral indices {alpha} {approx} -0.67 (where F {sub {nu}}{proportional_to}{nu}{sup {alpha}}) with {+-}0.15 (1{sigma}) scatter, typical of nonthermal (synchrotron) emission from star-forming galaxies. The contrast of our 4-8 GHz data with literature 1.5 and 8.4 GHz flux densities gives further evidence for curvature of the radio SED of U/LIRGs. The SED appears flatter near {approx}1 GHz than near {approx}6 GHz, suggesting significant optical depth effects at lower frequencies. The high-frequency (28-37 GHz) flux densities are low compared to extrapolations from the 4-8 GHz data. We confirm and extend to higher frequency a previously observed deficit of high-frequency radio emission for luminous starburst galaxies.

Leroy, Adam K.; Evans, Aaron S.; Condon, James [National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903-2475 (United States); Momjian, Emmanuel; Ott, Juergen; Meier, David S. [National Radio Astronomy Observatory, P.O. Box O, Socorro, NM 87801 (United States); Murphy, Eric [Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101 (United States); Armus, Lee; Haan, Sebastian; Mazzarella, Joseph M.; Surace, Jason [Spitzer Science Center, California Institute of Technology, MC 314-6, Pasadena, CA 91125 (United States); Privon, George C. [Department of Astronomy, University of Virginia, 530 McCormick Road, Charlottesville, VA 22904 (United States); Schinnerer, Eva; Walter, Fabian [Max Planck Institut fuer Astronomie, Koenigstuhl 17, Heidelberg D-69117 (Germany)

2011-09-20T23:59:59.000Z

53

FoxA1 as a lineage-specific oncogene in luminal type breast cancer  

SciTech Connect

The forkhead transcription factor FoxA1 is thought to be involved in mammary tumorigenesis. However, the precise role of FoxA1 in breast cancer development is controversial. We examined expression of FoxA1 in 35 human breast cancer cell lines and compared it with that of ErbB2, a marker of poor prognosis in breast cancer. We found that FoxA1 is expressed at high levels in all ErbB2-positive cell lines and a subset of ErbB2-negative cell lines. Down-regulation of FoxA1 by RNA interference significantly suppressed proliferation of ErbB2-negative and FoxA1-positive breast cancer cell lines. Down-regulation of FoxA1 also enhanced the toxic effect of Herceptin on ErbB2-positive cell lines through induction of apoptosis. Taken together with previous data that FoxA1 is a marker of luminal cells in mammary gland, our present results suggest that FoxA1 plays an important role as a lineage-specific oncogene in proliferation of cancer cells derived from mammary luminal cells.

Yamaguchi, Noritaka [Consolidated Research Institute for Advanced Science and Medical Care, Waseda University, 513 Wasedatsurumaki-cho, Shinjuku-ku, Tokyo 162-0041 (Japan); Division of Cellular and Molecular Biology, Department of Cancer Biology, Institute of Medical Science, University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639 (Japan); Ito, Emi [Department of Clinical Informatics, Graduate School of Medicine and Dentistry, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519 (Japan); Azuma, Sakura [Division of Cellular and Molecular Biology, Department of Cancer Biology, Institute of Medical Science, University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639 (Japan); Honma, Reiko; Yanagisawa, Yuka [Department of Clinical Informatics, Graduate School of Medicine and Dentistry, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519 (Japan); Nishikawa, Akira [Department of Clinical Informatics, Graduate School of Medicine and Dentistry, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519 (Japan); Nippon Gene, Co., Ltd, 1-5 Kandanishiki-cho, Chiyoda-ku, Tokyo 101-0054 (Japan); Medicrome, Inc., 1-18-8 Nishi-Shinjuku, Shinjuku-ku, Tokyo 160-0023 (Japan); Kawamura, Mika [Department of Clinical Informatics, Graduate School of Medicine and Dentistry, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519 (Japan); Medicrome, Inc., 1-18-8 Nishi-Shinjuku, Shinjuku-ku, Tokyo 160-0023 (Japan); Imai, Jun-ichi [Department of Clinical Informatics, Graduate School of Medicine and Dentistry, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519 (Japan); Expression Profiles Team, Biological Information Research Center, National Institute of Advanced Industrial Science and Technology, 2-42 Aomi, Koto-ku, Tokyo 135-0064 (Japan)] (and others)

2008-01-25T23:59:59.000Z

54

Table lamp with dynamically controlled lighting distribution and uniformly illuminated luminous shade  

DOE Patents (OSTI)

A double lamp table or floor lamp lighting system has a pair of compact fluorescent lamps (CFLs) or other lamps arranged vertically, i.e. one lamp above the other, with a reflective septum in between. By selectively turning on one or both of the CFLs, down lighting, up lighting, or both up and down lighting is produced. The control system can also vary the light intensity from each CFL. The reflective septum ensures that almost all the light produced by each lamp will be directed into the desired light distribution pattern which is selected and easily changed by the user. In a particular configuration, the reflective septum is bowl shaped, with the upper CFL sitting in the bowl, and a luminous shade hanging down from the bowl. The lower CFL provides both task lighting and uniform shade luminance. Planar compact fluorescent lamps, e.g. circular CFLs, particularly oriented horizontally, are preferable. CFLs provide energy efficiency. However, other types of lamps, including incandescent, halogen, and LEDs can also be used in the fixture. The lighting system may be designed for the home, hospitality, office or other environments.

Siminovitch, Michael J. (Pinole, CA); Page, Erik R. (Berkeley, CA)

2002-01-01T23:59:59.000Z

55

Maximum likelihood continuity mapping for fraud detection  

SciTech Connect

The author describes a novel time-series analysis technique called maximum likelihood continuity mapping (MALCOM), and focuses on one application of MALCOM: detecting fraud in medical insurance claims. Given a training data set composed of typical sequences, MALCOM creates a stochastic model of sequence generation, called a continuity map (CM). A CM maximizes the probability of sequences in the training set given the model constraints, CMs can be used to estimate the likelihood of sequences not found in the training set, enabling anomaly detection and sequence prediction--important aspects of data mining. Since MALCOM can be used on sequences of categorical data (e.g., sequences of words) as well as real valued data, MALCOM is also a potential replacement for database search tools such as N-gram analysis. In a recent experiment, MALCOM was used to evaluate the likelihood of patient medical histories, where ``medical history`` is used to mean the sequence of medical procedures performed on a patient. Physicians whose patients had anomalous medical histories (according to MALCOM) were evaluated for fraud by an independent agency. Of the small sample (12 physicians) that has been evaluated, 92% have been determined fraudulent or abusive. Despite the small sample, these results are encouraging.

Hogden, J.

1997-05-01T23:59:59.000Z

56

Comment on "Efficiency of Isothermal Molecular Machines at Maximum Power"  

E-Print Network (OSTI)

Comment on "Efficiency of Isothermal Molecular Machines at Maximum Power" (PRL 108, 210602 (2012), arXiv:1201.6396)

Yunxin Zhang

2012-06-06T23:59:59.000Z

57

The Ultra Luminous X-ray sources in the High Velocity System of NGC 1275  

E-Print Network (OSTI)

We report the results of a study of X-ray point sources coincident with the High Velocity System (HVS) projected in front of NGC 1275. A very deep X-ray image of the core of the Perseus cluster made with the Chandra Observatory has been used. We find a population of Ultra-Luminous X-ray sources (ULX; 7 sources with LX [0.5-7 keV] > 7x10^39 erg/s). As with the ULX populations in the Antennae and Cartwheel galaxies, those in the HVS are associated with a region of very active star formation. Several sources have possible optical counterparts found on HST images, although the X-ray brightest one does not. Absorbed power-law models fit the X-ray spectra, with most having a photon index between 2 and 3.

O. Gonzalez-Martin; A. C. Fabian; J. S. Sanders

2006-01-09T23:59:59.000Z

58

DISCOVERY OF TWO SUPERNOVAE IN THE NUCLEAR REGIONS OF THE LUMINOUS INFRARED GALAXY IC 883  

SciTech Connect

We report the discovery of two consecutive supernovae (SNe), 2010cu and 2011hi, located at 0.''37 (180 pc) and 0.''79 (380 pc) projected distance, respectively, from the center of the K-band nucleus of the luminous infrared galaxy (LIRG) IC 883. The SNe were discovered in an ongoing near-infrared K-band search for core-collapse SNe in such galaxies using the ALTAIR/NIRI adaptive optics system with laser guide star at the Gemini-North Telescope. These are thus the closest SNe yet discovered to an LIRG nucleus in optical or near-infrared wavelengths. The near-infrared light curves and colors of both SNe are consistent with core-collapse events. Both SNe seem to suffer from relatively low host galaxy extinction suggesting that regardless of their low projected galactocentric distances, they are not deeply buried in the nuclear regions of the host galaxy.

Kankare, E.; Mattila, S.; Takalo, A. [Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Vaeisaelaentie 20, FI-21500 Piikkioe (Finland); Ryder, S. [Australian Astronomical Observatory, P.O. Box 296, Epping, NSW 1710 (Australia); Vaeisaenen, P. [South African Astronomical Observatory, P.O. Box 9, Observatory 7935 (South Africa); Alberdi, A.; Perez-Torres, M.-A.; Romero-Canizales, C. [Instituto de Astrofsica de Andalucia, IAA-CSIC, Apartado 3004, 18080 Granada (Spain); Alonso-Herrero, A.; Colina, L. [Departamento de Astrofisica, Centro de Astrobiologia, CSIC/INTA, Carretera de Torrejon a Ajalvir, km 4, 28850, Torrejon de Ardoz, Madrid (Spain); Efstathiou, A. [School of Sciences, European University Cyprus, Diogenes Street, Engomi, 1516 Nicosia (Cyprus); Kotilainen, J. [Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Vaeisaelaentie 20, FI-21500 Piikkioe (Finland); Melinder, J., E-mail: erkki.kankare@utu.fi [Department of Astronomy, Oskar Klein Centre, Stockholm University, AlbaNova University Centre, 106 91 Stockholm (Sweden)

2012-01-10T23:59:59.000Z

59

Stellar Populations Found in the Central kpc of Four Luminous Compact Blue Galaxies at Intermediate Redshift  

E-Print Network (OSTI)

We investigate the star formation history of the central regions of four Luminous Compact Blue Galaxies (LCBGs). LCBGs are blue (B-V<0.6), compact (MU_B<21.5 mag arcsec^-2) galaxies with absolute magnitudes M_B brighter than -17.5. The LCBGs analyzed here are located at 0.436luminous (M_B < -20.5), blue (B-V < 0.4) and high surface brightness (MU_B < 19.0 mag arcsec^-2) of this population. The observational data used were obtained with the HST/STIS spectrograph, the HST/WF/PC-2 camera and the HST/NICMOS first camera. We find evidence for multiple stellar populations. One of them is identified as the ionizing population, and the other one corresponds to the underlying stellar generation. The estimated masses of the inferred populations are compatible with the dynamical masses, which are typically 2--10x 10^9 M_sun. Our models also indicate that the first episodes of star formation the presented LCBGs underwent happened between 5 and 7 Gyr ago. We compare the stellar populations found in LCBGs with the stellar populations present in bright, local HII galaxies, nearby spheroidal systems and Blue Compact Dwarf Galaxies. It turns out that the underlying stellar populations of LCBGs are similar yet bluer to those of local HII galaxies. It is also the case that the passive color evolution of the LCBGs could convert them into local Spheroidal galaxies if no further episode of star formation takes place. Our results help to impose constraints on evolutionary scenarios for the population of LCBGs found commonly at intermediate redshifts.

C. Hoyos; R. Guzman; A. I. Diaz; D. C. Koo; M. A. Bershady; .

2007-09-28T23:59:59.000Z

60

Galaxy groups in the 2dFGRS: the luminous content of the groups  

E-Print Network (OSTI)

The 2dFGRS Percolation-Inferred Galaxy Group (2PIGG) catalogue of ~29000 objects is used to study the luminous content of galaxy systems of various sizes. Mock galaxy catalogues constructed from cosmological simulations are used to gauge the accuracy with which intrinsic group properties can be recovered. A Schechter function is found to be a reasonable fit to the galaxy luminosity functions in groups of different mass in the real data. The characteristic luminosity L* is larger for more massive groups. However, the mock data show that the shape of the recovered luminosity function is expected to differ from the true shape, and this must be allowed for when interpreting the data. The variation of halo mass-to-light ratio with group size is studied in both these wavebands. A robust trend of increasing M/L with increasing group luminosity is found in the 2PIGG data. From groups with L_bj=10^{10}Lsol to those 100 times more luminous, the typical bj-band M/L increases by a factor of 5, whereas the rf-band M/L grows by a factor of 3.5. These trends agree well with the simulations, which also predict a minimum M/L on a scale corresponding to the Local Group. Our data indicate that if such a minimum exists, then it must occur at L<~10^{10}Lsol, below the range accurately probed by the 2PIGG catalogue. According to the mock data, the bj M/Ls of the largest groups are expected to be approximately 1.1 times the global value. Assuming that this correction applies to the real data yields an estimate of Omega_m=0.26+/-0.03 (statistical).

V. R. Eke; C. S. Frenk; C. M. Baugh; S. Cole; P. Norberg; J. A. Peacock; I. K. Baldry; J. Bland-Hawthorn; T. Bridges; R. Cannon; M. Colless; C. Collins; W. Couch; G. Dalton; R. De Propris; S. P. Driver; G. Efstathiou; R. S. Ellis; K. Glazebrook; C. Jackson; O. Lahav; I. Lewis; S. Lumsden; S. Maddox; D. Madgwick; B. A. Peterson; W. Sutherland; K. Taylor

2004-02-26T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Dynamical modelling of luminous and dark matter in 17 Coma early-type galaxies  

E-Print Network (OSTI)

Dynamical models for 17 Coma early-type galaxies are presented. The galaxy sample consists of flattened, rotating as well as non-rotating early-types including cD and S0 galaxies with luminosities between M=-18.79 and M=-22.56. Kinematical long-slit observations cover at least the major and minor axis and extend to 1-4 effective radii. Axisymmetric Schwarzschild models are used to derive stellar mass-to-light ratios and dark halo parameters. In every galaxy models with a dark matter halo match the data better than models without. The statistical significance is over 95 percent for 8 galaxies, around 90 percent for 5 galaxies and for four galaxies it is not significant. For the highly significant cases systematic deviations between observed and modelled kinematics are clearly seen; for the remaining galaxies differences are more statistical in nature. Best-fit models contain 10-50 percent dark matter inside the half-light radius. The central dark matter density is at least one order of magnitude lower than the luminous mass density. The central phase-space density of dark matter is often orders of magnitude lower than in the luminous component, especially when the halo core radius is large. The orbital system of the stars along the major-axis is slightly dominated by radial motions. Some galaxies show tangential anisotropy along the minor-axis, which is correlated with the minor-axis Gauss-Hermite coefficient H4. Changing the balance between data-fit and regularisation constraints does not change the reconstructed mass structure significantly. Model anisotropies tend to strengthen if the weight on regularisation is reduced, but the general property of a galaxy to be radially or tangentially anisotropic, respectively, does not change. (abridged)

J. Thomas; R. P. Saglia; R. Bender; D. Thomas; K. Gebhardt; J. Magorrian; E. M. Corsini; G. Wegner

2007-09-05T23:59:59.000Z

62

Properties of Luminous Red Galaxies in the Sloan Digital Sky Survey  

E-Print Network (OSTI)

We perform population synthesis modelling of a magnitude-limited sample of 4391 Luminous Red Galaxies selected from the Sloan Digital Sky Survey Data Release 4 (SDSS DR4). We fit measured spectral indices using a large library of high resolution spectra, covering a wide range of metallicities and assuming an exponentially decaying star-formation rate punctuated by bursts, to obtain median-likelihood estimates for the light-weighted age, metallicity, stellar mass and extinction for the galaxies. The ages lie in the range 4-10 Gyr, peaking near 6 Gyr, with metallicities in the range -0.4<[Z/H]<0.4, peaking at [Z/H] ~ 0.2. Only a few per cent of the spectra are better fit allowing for a burst in addition to continuous star-formation. The total stellar masses of all the galaxies are confined to a very narrow range. Our results broadly agree with those of previous groups using an independent population synthesis code. We find, however, that our choice in priors results in ages 1-2 Gyr smaller, decreasing the peak star formation epoch from z=2.3 to z=1.3. We develop a metal evolution model incorporating stochastic star-formation quenching motivated by recent attempts to solve the `anti-hierarchical' formation problem of ellipticals. Two scenarios emerge, a closed box with an effective stellar yield of 0.26, and an accreting box with an effective stellar yield of 0.10. Both scenarios require an IMF weighted towards massive stars and characteristic star-formation quenching times of about 100 Myr, the expected lifetime of luminous QSOs. The models predict an anti-correlation between the age and mean metallicity similar to that observed.

T. Barber; A. Meiksin; T. Murphy

2006-11-02T23:59:59.000Z

63

Pattern formation, logistics, and maximum path probability  

Science Journals Connector (OSTI)

The concept of pattern formation, which to current researchers is a synonym for self-organization, carries the connotation of deductive logic together with the process of spontaneous inference. Defining a pattern as an equivalence relation on a set of thermodynamic objects, we establish that a large class of irreversible pattern-forming systems, evolving along idealized quasisteady paths, approaches the stable steady state as a mapping upon the formal deductive imperatives of a propositional function calculus. In the preamble the classical reversible thermodynamics of composite systems is analyzed as an externally manipulated system of space partitioning and classification based on ideal enclosures and diaphragms. The diaphragms have discrete classificationcapabilities which are designated in relation to conserved quantities by descriptors such as impervious, diathermal, and adiabatic. Differentiability in the continuum thermodynamic calculus is invoked as equivalent to analyticity and consistency in the underlying class or sentential calculus. The seat of inference, however, rests with the thermodynamicist. In the transition to an irreversible pattern-forming system the defined nature of the composite reservoirs remains, but a given diaphragm is replaced by a pattern-forming system which by its nature is a spontaneously evolving volume partitioner and classifier of invariants. The seat of volition or inference for the classification system is thus transferred from the experimenter or theoretician to the diaphragm, and with it the full deductive facility. The equivalence relations or partitions associated with the emerging patterns may thus be associated with theorems of the natural pattern-forming calculus. The entropyfunction, together with its derivatives, is the vehicle which relates the logistics of reservoirs and diaphragms to the analog logistics of the continuum. Maximum path probability or second-order differentiability of the entropy in isolation are sufficiently strong interpretations of the second law of thermodynamics to define the approach to and the nature of patterned stable steady states. For many pattern-forming systems these principles define quantifiable stable states as maxima or minima (or both) in the dissipation. An elementary statistical-mechanical proof is offered. To turn the argument full circle, the transformations of the partitions and classes which are predicated upon such minimax entropic paths can through digital modeling be directly identified with the syntactic and inferential elements of deductive logic. It follows therefore that all self-organizing or pattern-forming systems which possess stable steady states approach these states according to the imperatives of formal logic, the optimum pattern with its rich endowment ofequivalence relations representing the central theorem of the associated calculus. Logic is thus the stuff of the universe, and biological evolution with its culmination in the human brain is the most significant example of all the irreversible pattern-forming processes. We thus conclude with a few remarks on the relevance of the contribution to the theory of evolution and to research on artificial intelligence.

J. S. Kirkaldy

1985-05-01T23:59:59.000Z

64

The WiggleZ Dark Energy Survey: star formation in UV-luminous galaxies from their luminosity functions  

Science Journals Connector (OSTI)

......research-article Article The WiggleZ Dark Energy Survey: star formation in UV-luminous...data release of the WiggleZ Dark Energy Survey. Our sample consists of 39-996...observations of the WiggleZ Dark Energy Survey of UV-selected galaxies using......

Russell J. Jurek; Michael J. Drinkwater; Kevin Pimbblet; Karl Glazebrook; Chris Blake; Sarah Brough; Matthew Colless; Carlos Contreras; Warrick Couch; Scott Croom; Darren Croton; Tamara M. Davis; Karl Forster; David Gilbank; Mike Gladders; Ben Jelliffe; I-hui Li; Barry Madore; D. Christopher Martin; Gregory B. Poole; Michael Pracy; Rob Sharp; Emily Wisnioski; David Woods; Ted K. Wyder; H. K. C. Yee

2013-01-01T23:59:59.000Z

65

8.4 White Dwarfs As an asymptotic giant branch star becomes larger and more luminous, the  

E-Print Network (OSTI)

8.4 White Dwarfs As an asymptotic giant branch star becomes larger and more luminous, the rate is the reminant core, the white dwarf. Our knowledge of white dwarfs began in 1850 with the discovery be both hot and faint was for Sirius B to be very, very small, and so they were called white dwarf stars

Peletier, Reynier

66

Vehicle Technologies Office: Fact #410: February 6, 2006 Maximum Speed  

NLE Websites -- All DOE Office Websites (Extended Search)

0: February 6, 0: February 6, 2006 Maximum Speed Limits by State, 2005 to someone by E-mail Share Vehicle Technologies Office: Fact #410: February 6, 2006 Maximum Speed Limits by State, 2005 on Facebook Tweet about Vehicle Technologies Office: Fact #410: February 6, 2006 Maximum Speed Limits by State, 2005 on Twitter Bookmark Vehicle Technologies Office: Fact #410: February 6, 2006 Maximum Speed Limits by State, 2005 on Google Bookmark Vehicle Technologies Office: Fact #410: February 6, 2006 Maximum Speed Limits by State, 2005 on Delicious Rank Vehicle Technologies Office: Fact #410: February 6, 2006 Maximum Speed Limits by State, 2005 on Digg Find More places to share Vehicle Technologies Office: Fact #410: February 6, 2006 Maximum Speed Limits by State, 2005 on AddThis.com...

67

Engineer End Uses for Maximum Efficiency | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

for Maximum Efficiency (August 2004) More Documents & Publications Maintaining System Air Quality Compressed Air Storage Strategies Alternative Strategies for Low Pressure End Uses...

68

Maximum Constant Boost Control of the Z-Source Inverter  

E-Print Network (OSTI)

Maximum Constant Boost Control of the Z-Source Inverter Miaosen Shen1 , Jin Wang1 , Alan Joseph1 Laboratory Abstract: This paper proposes two maximum constant boost control methods for the Z-source inverter to modulation index is analyzed in detail and verified by simulation and experiment. Keywords- Z-source inverter

Tolbert, Leon M.

69

Acceleration of Maximum Likelihood Estimation for Tomosynthesis Mammography  

E-Print Network (OSTI)

the amount of x-ray radiation exposure to the patients, tomosynthesis uses a lower dose of x-ray than convenAcceleration of Maximum Likelihood Estimation for Tomosynthesis Mammography Juemin Zhang, Waleed twu2@partners.org Abstract Maximum likelihood (ML) estimation is used dur- ing tomosynthesis

Meleis, Waleed

70

Maximum Residual Energy Routing with Reverse Energy Cost  

E-Print Network (OSTI)

node consumes energy, but the receiving node does not. This assumption is not true if acknowledgementsMaximum Residual Energy Routing with Reverse Energy Cost Qiling Xie, Chin-Tau Lea, Mordecai J-The Maximum Residual Energy Path (MREP) routing has been shown an effective routing scheme for energy

Fleischer, Rudolf

71

The Properties of Ultraviolet-Luminous Galaxies at the Current Epoch  

E-Print Network (OSTI)

We have used the first matched set of GALEX and SDSS data to investigate the properties of a sample of 74 nearby galaxies with far-ultraviolet luminosities chosen to overlap the luminosity range of typical high-z Lyman Break Galaxies (LBGs). GALEX deep surveys have shown that ultraviolet-luminous galaxies (UVLGs) similar to these are the fastest evolving component of the UV galaxy population. Model fits to the combined GALEX and SDSS photometry yield typical FUV extinctions similar to LBGs. The implied star formation rates are SFR ~ 3 to 30 solar mass per year. This overlaps the range of SFRs for LBGs. We find a strong inverse correlation between galaxy mass and far-ultraviolet surface brightness, and on this basis divide the sample into ``large'' and ``compact'' UVLGs. The compact UVLGs have half-light radii of a few kpc or less (similar to LBGs). They are relatively low mass galaxies (~10 billion solar masses) with typical velocity dispersions of 60 to 150 km/s. They span a range in metallicity from 0.3 to 1 times solar, have blue optical-UV colors, and are forming stars at a rate sufficient to build the present galaxy in ~a Gigayear. In all these respects they appear similar to the LBG population. These ``living fossils'' may therefore provide an opportunity for detailed investigation of the physical processes occurring in typical star forming galaxies in the early universe.

Timothy M. Heckman; Charles G. Hoopes; Mark Seibert; Christopher Martin; Samir Salim; R. Michael Rich; Guinevere Kauffmann; Stephane Charlot; Tom A. Barlow; Luciana Bianchi; Yong-Ik Byun; Jose Donas; Karl Forster; Patrick N. Jelinsky; Young-Wook Lee; Barry F. Madore; Roger F. Malina; Bruno Milliard; Patrick F. Morrissey; Susan G. Neff; David Schiminovich; Oswald H. W. Siegmund; Todd Small; Alex S. Szalay; Barry Y. Welsh; Ted K. Wyder

2004-12-21T23:59:59.000Z

72

Super-Eddington accretion in ultra-luminous neutron star binary  

E-Print Network (OSTI)

We discuss properties of the ultra-luminous $X$-ray source in the galaxy M82, NuSTAR J095551+6940.8, containing an accreting neutron star. The neutron star has surface magnetic field $ B_{NS} \\approx 1.4 \\times 10^{13 } \\, {\\rm G}$ and experiences accretion rate of $9 \\times 10^{-7} M_\\odot {\\rm \\, yr}^{-1} $. The magnetospheric radius, close to the corotation radius, is $\\sim 2 \\times 10^8$ cm. The accretion torque on the neutron star is reduce well below what is expected in a simple magnetospheric accretion due to effective penetration of the stellar magnetic field into the disk beyond the corotation radius. As a result, the radiative force of the surface emission does not lead to strong coronal wind, but pushes plasma along magnetic field lines towards the equatorial disk. The neutron star is nearly an orthogonal rotator, with the angle between the rotation axis and the magnetic moment $\\geq 80$ degrees. Accretion occurs through optically thick -- geometrically thin and flat accretion "curtain", which cuts...

Lyutikov, Maxim

2014-01-01T23:59:59.000Z

73

A Model for Most Luminous and Long Duration Cosmic Gamma Ray Bursts  

E-Print Network (OSTI)

We exploit the fact that General Theory of Relativity (GTR) predicts the existence of compact objects having surface gravitational redshift z_s burst rises dramatically with the value of z_c and can saturate to ~40%. This may explain a gamma ray burst of energy as high as ~5. 10**53 erg. By using the already existing detailed (Newtonian) calculations, it follows that the neutrino heating driven mass loss should be negligible, and the bulk Lorentz factor of the initial fireball could be ~1000. Most of the existing supernova calculations also show that it is extremely difficult to simulate the direct neutrino driven mass loss, and, the shock is not launched if the gravitational field becomes stronger. Since the gravitation potential well of the more compact NS is indded very deep, we do not expect additional baryonic mass ejection. So, without invoking any exotic physics (like strange stars) or overstretching any theory, we may explain most of the luminous GRBs in this simple model.

Abhas Mitra

1998-12-03T23:59:59.000Z

74

The Nuclear Spectral Energy Distribution of NGC 4395, The Least Luminous Type 1 Seyfert Galaxy  

E-Print Network (OSTI)

We present X-ray (ROSAT), infrared, and radio observations of NGC 4395, which harbors the optically least luminous type 1 Seyfert nucleus discovered thus far. In combination with published optical and ultraviolet spectra, we have used these data to assemble the broadband spectral energy distribution (SED) of the galaxy's nucleus. Interestingly, the SED of NGC 4395 differs markedly from the SEDs of both quasars and typical low-luminosity active galactic nuclei, which may be a manifestation of the different physical conditions (i.e., black hole masses, accretion rates, and/or accretion modes) that exist in these objects. The nuclear X-ray source in NGC 4395 is variable and has an observed luminosity of just ~ 10^38 ergs/s. Although this emission could plausibly be associated with either a weak active nucleus or a bright stellar-mass binary system, the optical and ultraviolet emission-line properties of the nucleus strongly suggest that the X-rays arise from a classical AGN.

E. C. Moran; A. V. Filippenko; L. C. Ho; J. C. Shields; T. Belloni; A. Comastri; S. L. Snowden; R. A. Sramek

1999-04-28T23:59:59.000Z

75

The Nature of Nearby Counterparts to Intermediate Redshift Luminous Compact Blue Galaxies II. CO Observations  

E-Print Network (OSTI)

We present the results of a single-dish beam-matched survey of the three lowest rotational transitions of CO in a sample of 20 local (D < 70 Mpc) Luminous Compact Blue Galaxies (LCBGs). These ~L*, blue, high surface brightness, starbursting galaxies were selected with the same criteria used to define LCBGs at higher redshifts. Our detection rate was 70%, with those galaxies having Lblue<7e9 Lsun no detected. We find the H2 masses of local LCBGs range from 6.6e6 to 2.7e9 Msun, assuming a Galactic CO-to-H2 conversion factor. Combining these results with our earlier HI survey of the same sample, we find that the ratio of molecular to atomic gas mass is low, typically 5-10%. Using a Large Velocity Gradient model, we find that the average gas conditions of the entire ISM in local LCBGs are similar to those found in the centers of star forming regions in our Galaxy, and nuclear regions of other galaxies. Star formation rates, determined from IRAS fluxes, are a few solar masses per year, much higher per unit dynamical mass than normal spirals. If this rate remains constant, the molecular hydrogen depletion time scales are short, 10-200 Myr.

C. A. Garland; J. P. Williams; D. J. Pisano; R. Guzman; F. J. Castander; J. Brinkmann

2005-02-03T23:59:59.000Z

76

Stellar Masses of Luminous Compact Blue Galaxies at Redshifts z=0.4-1.2  

E-Print Network (OSTI)

We present stellar mass measurements for a sample of 36 Luminous Compact Blue Galaxies (LCBGs) at redshifts z = 0.4-1.2 in the Flanking Fields around the Hubble Deep Field North. The technique is based on fitting a two-component galaxy population model to multi-broadband photometry. Best-fit models are found to be largely independent on the assumed values for the IMF and the metallicity of the stellar populations, but are sensitive to the amount of extinction and the extinction law adopted. On average, the best-fit model corresponds to a LMC extinction law with E(B-V)=0.5. Stellar mass estimates, however, are remarkably independent on the final model choice. Using a Salpeter IMF, the derived median stellar mass for this sample is 5 x 10^9 Mo, i.e., ~2 times smaller than previous virial mass estimates. Despite uncertainties of a factor 2-3, our results strengthen prior claims that L* CBGs at intermediate redshifts are, on average, about 10 times less massive than a typical L* galaxy today.

R. Guzman; G. Ostlin; D. Kunth; M. Bershady; D. Koo; M. Pahre

2003-02-12T23:59:59.000Z

77

The Consumption of Carbon in the Electric Arc. I. Variation with Current and Arc-Length. II. Influence upon the Luminous Radiation from the Arc  

Science Journals Connector (OSTI)

1 December 1915 research-article The Consumption of Carbon in the Electric Arc. I. Variation with Current and Arc-Length. II. Influence upon the Luminous Radiation from the...

1915-01-01T23:59:59.000Z

78

A robust distance measurement and dark energy constraints from the spherically averaged correlation function of Sloan Digital Sky Survey luminous red Galaxies  

Science Journals Connector (OSTI)

......measurement and dark energy constraints...Digital Sky Survey luminous red...Digital Sky Survey (SDSS) data...assuming a dark energy model or a...constraints on the dark energy and cosmological...largest effective survey volume to date......

Chia-Hsun Chuang; Yun Wang; Maddumage Don P. Hemantha

2012-06-21T23:59:59.000Z

79

NO CLEAR SUBMILLIMETER SIGNATURE OF SUPPRESSED STAR FORMATION AMONG X-RAY LUMINOUS ACTIVE GALACTIC NUCLEI  

SciTech Connect

Many theoretical models require powerful active galactic nuclei (AGNs) to suppress star formation in distant galaxies and reproduce the observed properties of today's massive galaxies. A recent study based on Herschel-SPIRE submillimeter observations claimed to provide direct support for this picture, reporting a significant decrease in the mean star formation rates (SFRs) of the most luminous AGNs (L{sub X} >10{sup 44} erg s{sup -1}) at z Almost-Equal-To 1-3 in the Chandra Deep Field-North (CDF-N). In this Letter, we extend these results using Herschel-SPIRE 250 {mu}m data in the COSMOS and Chandra Deep Field-South fields to achieve an order-of-magnitude improvement in the number of sources at L{sub X} >10{sup 44} erg s{sup -1}. On the basis of our analysis, we find no strong evidence for suppressed star formation in L{sub X} >10{sup 44} erg s{sup -1} AGNs at z Almost-Equal-To 1-3. The mean SFRs of the AGNs are constant over the broad X-ray luminosity range of L{sub X} Almost-Equal-To 10{sup 43}-10{sup 45} erg s{sup -1} (with mean SFRs consistent with typical star-forming galaxies at z Almost-Equal-To 2; (SFRs) Almost-Equal-To 100-200 M{sub Sun} yr{sup -1}). We suggest that the previous CDF-N results were likely due to low number statistics. We discuss our results in the context of current theoretical models.

Harrison, C. M.; Alexander, D. M.; Mullaney, J. R.; Del Moro, A.; Rovilos, E. [Department of Physics, Durham University, South Road, Durham DH1 3LE (United Kingdom); Altieri, B.; Coia, D. [Herschel Science Centre, European Space Astronomy Centre, Villanueva de la Canada, E-28691 Madrid (Spain); Charmandaris, V. [Department of Physics and Institute of Theoretical and Computation Physics, University of Crete, 71003 Heraklion (Greece); Daddi, E.; Le Floc'h, E.; Leiton, R. [Laboratoire AIM, CEA/DSM-CNRS-Universite Paris Diderot, Irfu/Service d Astrophysique, CEA-Saclay, Orme des Merisiers, F-91191 Gif-sur-Yvette Cedex (France); Dannerbauer, H. [Insitut fuer Astrophysik, Universitaet Wien, Tuerkenschanzstrasse 17, A-1180 Wien (Austria); Dasyra, K. [Observatoire de Paris, LERMA (CNRS:UMR8112), 61 Av. de l'Observatoire, F-75014 Paris (France); Dickinson, M.; Kartaltepe, J. [National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Hickox, R. C. [Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory, Hanover, NH 03755 (United States); Ivison, R. J. [UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); Magnelli, B.; Popesso, P.; Rosario, D. [Max-Planck-Institut fuer Extraterrestrische Physik (MPE), Postfach 1312, D-85741 Garching (Germany); and others

2012-11-20T23:59:59.000Z

80

ACOUSTIC SCALE FROM THE ANGULAR POWER SPECTRA OF SDSS-III DR8 PHOTOMETRIC LUMINOUS GALAXIES  

SciTech Connect

We measure the acoustic scale from the angular power spectra of the Sloan Digital Sky Survey III (SDSS-III) Data Release 8 imaging catalog that includes 872, 921 galaxies over {approx}10,000 deg{sup 2} between 0.45 < z < 0.65. The extensive spectroscopic training set of the Baryon Oscillation Spectroscopic Survey luminous galaxies allows precise estimates of the true redshift distributions of galaxies in our imaging catalog. Utilizing the redshift distribution information, we build templates and fit to the power spectra of the data, which are measured in our companion paper, to derive the location of Baryon acoustic oscillations (BAOs) while marginalizing over many free parameters to exclude nearly all of the non-BAO signal. We derive the ratio of the angular diameter distance to the sound horizon scale D{sub A} (z)/r{sub s} = 9.212{sup +0.416}{sub -{sub 0.404}} at z = 0.54, and therefore D{sub A} (z) = 1411 {+-} 65 Mpc at z = 0.54; the result is fairly independent of assumptions on the underlying cosmology. Our measurement of angular diameter distance D{sub A} (z) is 1.4{sigma} higher than what is expected for the concordance {Lambda}CDM, in accordance to the trend of other spectroscopic BAO measurements for z {approx}> 0.35. We report constraints on cosmological parameters from our measurement in combination with the WMAP7 data and the previous spectroscopic BAO measurements of SDSS and WiggleZ. We refer to our companion papers (Ho et al.; de Putter et al.) for investigations on information of the full power spectrum.

Seo, Hee-Jong [Berkeley Center for Cosmological Physics, LBL and Department of Physics, University of California, Berkeley, CA 94720 (United States); Ho, Shirley; White, Martin; Reid, Beth; Schlegel, David J. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States); Cuesta, Antonio J.; Padmanabhan, Nikhil [Yale Center for Astronomy and Astrophysics, Yale University, New Haven, CT 06511 (United States); Ross, Ashley J.; Percival, Will J.; Nichol, Robert C. [Institute of Cosmology and Gravitation, Dennis Sciama Building, University of Portsmouth, Portsmouth PO1 3FX (United Kingdom); Saito, Shun [Department of Astronomy, 601 Campbell Hall, University of California at Berkeley, Berkeley, CA 94720 (United States); De Putter, Roland [Instituto de Fisica Corpuscular, Valencia (Spain); Eisenstein, Daniel J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS 20, Cambridge, MA 02138 (United States); Xu Xiaoying; Skibba, Ramin [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Schneider, Donald P. [Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA 16802 (United States); Verde, Licia [Institucio Catalana de Recerca i Estudis Avancats, Barcelona (Spain); Bizyaev, Dmitry; Brewington, Howard; Brinkmann, J. [Apache Point Observatory, 2001 Apache Point Road, Sunspot, NM 88349 (United States); and others

2012-12-10T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

OBSERVATIONS OF DARK AND LUMINOUS MATTER: THE RADIAL DISTRIBUTION OF SATELLITE GALAXIES AROUND MASSIVE RED GALAXIES  

SciTech Connect

We study the projected radial distribution of satellite galaxies around more than 28,000 luminous red galaxies (LRGs) at 0.28 < z < 0.40 and trace the gravitational potential of LRG groups in the range 15 < r/kpc < 700. We show that at large radii the satellite number-density profile is well fitted by a projected Navarro-Frenk-White (NFW) profile with r{sub s} {approx} 270 kpc and that at small radii this model underestimates the number of satellite galaxies. Utilizing the previously measured stellar light distribution of LRGs from deep imaging stacks, we demonstrate that this small-scale excess is consistent with a non-negligible baryonic mass contribution to the gravitational potential of massive groups and clusters. The combined NFW+scaled stellar profile provides an excellent fit to the satellite number-density profile all the way from 15 kpc to 700 kpc. Dark matter dominates the total mass profile of LRG halos at r > 25 kpc whereas baryons account for more than 50% of the mass at smaller radii. We calculate the total dark-to-baryonic mass ratio and show that it is consistent with measurements from weak lensing for environments dominated by massive early-type galaxies. Finally, we divide the satellite galaxies in our sample into three luminosity bins and show that the satellite light profiles of all brightness levels are consistent with each other outside of roughly 25 kpc. At smaller radii we find evidence for a mild mass segregation with an increasing fraction of bright satellites close to the central LRG.

Tal, Tomer; Wake, David A.; Van Dokkum, Pieter G., E-mail: tomer.tal@yale.edu [Astronomy Department, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States)

2012-05-20T23:59:59.000Z

82

Maximum Photovoltaic Penetration Levels on Typical Distribution Feeders: Preprint  

SciTech Connect

This paper presents simulation results for a taxonomy of typical distribution feeders with various levels of photovoltaic (PV) penetration. For each of the 16 feeders simulated, the maximum PV penetration that did not result in steady-state voltage or current violation is presented for several PV location scenarios: clustered near the feeder source, clustered near the midpoint of the feeder, clustered near the end of the feeder, randomly located, and evenly distributed. In addition, the maximum level of PV is presented for single, large PV systems at each location. Maximum PV penetration was determined by requiring that feeder voltages stay within ANSI Range A and that feeder currents stay within the ranges determined by overcurrent protection devices. Simulations were run in GridLAB-D using hourly time steps over a year with randomized load profiles based on utility data and typical meteorological year weather data. For 86% of the cases simulated, maximum PV penetration was at least 30% of peak load.

Hoke, A.; Butler, R.; Hambrick, J.; Kroposki, B.

2012-07-01T23:59:59.000Z

83

On the maximum pressure rise rate in boosted HCCI operation  

E-Print Network (OSTI)

This paper explores the combined effects of boosting, intake air temperature, trapped residual gas fraction, and dilution on the Maximum Pressure Rise Rate (MPRR) in a boosted single cylinder gasoline HCCI engine with ...

Wildman, Craig B.

84

Nonstationary analysis of annual maximum streamflow of Canada  

Science Journals Connector (OSTI)

Both natural climate change and anthropogenic impacts may cause nonstationarities in hydrological extremes. In this study, long-term annual maximum streamflow (AMS) records from 145 stations over Canada were used to investigate the nonstationary ...

Xuezhi Tan; Thian Yew Gan

85

Propane spectral resolution enhancement by the maximum entropy method  

Science Journals Connector (OSTI)

The Burg algorithm for maximum entropy power spectral density estimation is applied to a time series of data obtained from a Michelson interferometer and compared with a standard fast...

Bonavito, N L; Yeh, K C; Stewart, K P; Inguva, R; Hurley, E J

1990-01-01T23:59:59.000Z

86

Is there a maximum observable redshift in an open universe?  

E-Print Network (OSTI)

An estimate of the maximum observable redshift is obtained using only t_{0} approximately equal to (14+- 3)10^{9}years, H_{0} approximately equal to 65 +- 10Km\\sec^{-1}Mpc^{-1}(t_{0}H_{0} approximately equal to 0.91 +- 0.08/0.18) assuming \\Lambda approximately equal to 0. The resulting maximum redshift z_{+} approximately equal to 10 appears to give a reasonable upper limit to the highest actually observed redshifts. Some implications are discussed.

J. A. Gonzalo

2000-10-10T23:59:59.000Z

87

Efficiency at maximum power of interacting molecular machines  

E-Print Network (OSTI)

We investigate the efficiency of systems of molecular motors operating at maximum power. We consider two models of kinesin motors on a microtubule: for both the simplified and the detailed model, we find that the many-body exclusion effect enhances the efficiency at maximum power of the many-motor system, with respect to the single motor case. Remarkably, we find that this effect occurs in a limited region of the system parameters, compatible with the biologically relevant range.

N. Golubeva; A. Imparato

2012-10-22T23:59:59.000Z

88

Building Technologies Office: Pollution Impact on Cool Roof Efficacy  

NLE Websites -- All DOE Office Websites (Extended Search)

Pollution Impact on Pollution Impact on Cool Roof Efficacy Research Project to someone by E-mail Share Building Technologies Office: Pollution Impact on Cool Roof Efficacy Research Project on Facebook Tweet about Building Technologies Office: Pollution Impact on Cool Roof Efficacy Research Project on Twitter Bookmark Building Technologies Office: Pollution Impact on Cool Roof Efficacy Research Project on Google Bookmark Building Technologies Office: Pollution Impact on Cool Roof Efficacy Research Project on Delicious Rank Building Technologies Office: Pollution Impact on Cool Roof Efficacy Research Project on Digg Find More places to share Building Technologies Office: Pollution Impact on Cool Roof Efficacy Research Project on AddThis.com... About Take Action to Save Energy Partner with DOE

89

Property:Maximum Wave Height(m) | Open Energy Information  

Open Energy Info (EERE)

Property Property Edit with form History Facebook icon Twitter icon » Property:Maximum Wave Height(m) Jump to: navigation, search Property Name Maximum Wave Height(m) Property Type String Pages using the property "Maximum Wave Height(m)" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + 0.2 + 10-ft Wave Flume Facility + 0.5 + 11-ft Wave Flume Facility + 0.4 + 2 2-ft Flume Facility + 0.6 + 3 3-ft Wave Flume Facility + 0.2 + 5 5-ft Wave Flume Facility + 0.5 + 6 6-ft Wave Flume Facility + 0.4 + A Alden Large Flume + 0.0 + Alden Small Flume + 0.2 + Alden Wave Basin + 0.3 + B Breakwater Research Facility + 0.0 + C Carderock Maneuvering & Seakeeping Basin + 0.6 + Carderock Tow Tank 2 + 0.6 + Carderock Tow Tank 3 + 0.6 +

90

Efficiency of autonomous soft nano-machines at maximum power  

E-Print Network (OSTI)

We consider nano-sized artificial or biological machines working in steady state enforced by imposing non-equilibrium concentrations of solutes or by applying external forces, torques or electric fields. For unicyclic and strongly coupled multicyclic machines, efficiency at maximum power is not bounded by the linear response value 1/2. For strong driving, it can even approach the thermodynamic limit 1. Quite generally, such machines fall in three different classes characterized, respectively, as "strong and efficient", "strong and inefficient", and "balanced". For weakly coupled multicyclic machines, efficiency at maximum power has lost any universality even in the linear response regime.

Udo Seifert

2010-11-11T23:59:59.000Z

91

Maximum power tracking control scheme for wind generator systems  

E-Print Network (OSTI)

The purpose of this work is to develop a maximum power tracking control strategy for variable speed wind turbine systems. Modern wind turbine control systems are slow, and they depend on the design parameters of the turbine and use wind and/or rotor...

Mena, Hugo Eduardo

2009-05-15T23:59:59.000Z

92

Maximum power tracking control scheme for wind generator systems  

E-Print Network (OSTI)

The purpose of this work is to develop a maximum power tracking control strategy for variable speed wind turbine systems. Modern wind turbine control systems are slow, and they depend on the design parameters of the turbine and use wind and/or rotor...

Mena Lopez, Hugo Eduardo

2008-10-10T23:59:59.000Z

93

Performance of Civil Aviation Receivers during Maximum Solar Activity Events  

E-Print Network (OSTI)

Performance of Civil Aviation Receivers during Maximum Solar Activity Events Lina DEAMBROGIO on the fields of ionosphere scintillations, solar energetic particles and on the implementation of operational the upcoming period of high solar activity. Emilien ROBERT got his PhD in 2005 and started to work on behalf

Boyer, Edmond

94

Rapidly Solving an Online Sequence of Maximum Flow Problems  

E-Print Network (OSTI)

... an interdictor allocates a finite amount of resources to remove arcs from a net- ... is, the next maximum flow problem in the sequence differs from the previous one by ..... the appropriate reoptimization case and then taking the appropriate action to ..... Our first set of computational experiments tested the performance of our...

2008-02-29T23:59:59.000Z

95

THE MAXIMUM CAPACITY OF A LINE PLAN IS INAPPROXIMABLE  

E-Print Network (OSTI)

THE MAXIMUM CAPACITY OF A LINE PLAN IS INAPPROXIMABLE CHRISTINA PUHL AND SEBASTIAN STILLER Abstract a network, upper arc-capacities and a line pool. E-mail: puhl@math.tu-berlin.de, stiller of the European Commission under contract no. FP6-021235-2. 1 #12;2 CHRISTINA PUHL AND SEBASTIAN STILLER We

Nabben, Reinhard

96

Maximum-principle-satisfying and positivity-preserving high order ...  

E-Print Network (OSTI)

conservation laws: Survey and new developments ..... Notice that in (2.10) we need to evaluate the maximum/minimum of a ..... total energy, p is the pressure, e is the internal energy, and ? > 1 is a constant ... under a standard CFL condition.

2011-04-01T23:59:59.000Z

97

High-Energy Flare Observations from the Solar Maximum Mission  

Science Journals Connector (OSTI)

...research-article High-Energy Flare Observations from the Solar Maximum Mission W...Vestrand We review high-energy observations of solar flares with emphasis...expectation, high-energy emission is a common property of solar flares. Direct interpretation...

1991-01-01T23:59:59.000Z

98

Maximum Entropy in Support of Semantically Annotated Datasets  

E-Print Network (OSTI)

Maximum Entropy in Support of Semantically Annotated Datasets Paulo Pinheiro da Silva, Vladik whether two datasets describe the same quantity. The existing solution to this problem is to use these datasets' ontologies to deduce that these datasets indeed represent the same quantity. However, even when

Kreinovich, Vladik

99

O(1)-Approximations for Maximum Movement Piotr Berman1  

E-Print Network (OSTI)

movement of the pebbles, motivated by minimizing either execution time or energy usage. Spe- cific problems the maximum movement made by pebbles on a graph to reach a configuration in which the pebbles form a connected. For example, in the connectivity goal, the proximity of the robots should form a connected graph. Two

Demaine, Erik

100

Maximization of Recursive Utilities: A Dynamic Maximum Principle Approach  

E-Print Network (OSTI)

Maximization of Recursive Utilities: A Dynamic Maximum Principle Approach Wahid FAIDI LAMSIN, ENIT for a class of robust utility function introduced in Bordigoni, Matoussi et Schweizer (2005). Our method-investment strategy which is characterized as the unique solution of a forward-backward system. Key words : Utility

Di Girolami, Cristina

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Maximum stellar mass versus cluster membership number revisited  

E-Print Network (OSTI)

We have made a new compilation of observations of maximum stellar mass versus cluster membership number from the literature, which we analyse for consistency with the predictions of a simple random drawing hypothesis for stellar mass selection in clusters. Previously, Weidner and Kroupa have suggested that the maximum stellar mass is lower, in low mass clusters, than would be expected on the basis of random drawing, and have pointed out that this could have important implications for steepening the integrated initial mass function of the Galaxy (the IGIMF) at high masses. Our compilation demonstrates how the observed distribution in the plane of maximum stellar mass versus membership number is affected by the method of target selection; in particular, rather low n clusters with large maximum stellar masses are abundant in observational datasets that specifically seek clusters in the environs of high mass stars. Although we do not consider our compilation to be either complete or unbiased, we discuss the method by which such data should be statistically analysed. Our very provisional conclusion is that the data is not indicating any striking deviation from the expectations of random drawing.

Th. Maschberger; C. J. Clarke

2008-08-29T23:59:59.000Z

102

Renewable Energy Scheduling for Fading Channels with Maximum Power Constraint  

E-Print Network (OSTI)

Renewable Energy Scheduling for Fading Channels with Maximum Power Constraint Zhe Wang Electrical--In this paper, we develop efficient algorithm to obtain the optimal energy schedule for fading channel with energy harvesting. We assume that the side information of both the channel states and energy harvesting

Greenberg, Albert

103

Property:Maximum Velocity(m/s) | Open Energy Information  

Open Energy Info (EERE)

Velocity(m/s) Velocity(m/s) Jump to: navigation, search Property Name Maximum Velocity(m/s) Property Type String Pages using the property "Maximum Velocity(m/s)" Showing 25 pages using this property. (previous 25) (next 25) A Alden Large Flume + 0.9 + B Bucknell Hydraulic Flume + 2.7 + C Carderock Maneuvering & Seakeeping Basin + 7.2 + Carderock Rotating Arm Tow Tank + 25.8 + Carderock Tow Tank 1 + 9.3 + Carderock Tow Tank 2 + 10.3 + Carderock Tow Tank 3 + 25.8 + Chase Tow Tank + 2.5 + D Davidson Laboratory Tow Tank + 18.3 + H Haynes Tow Tank + 1.8 + I Ice Towing Tank + 0.5 + L Lakefront Tow Tank + 2.7 + M MHL Free Surface Channel + 2 + MHL High Speed Cavitation + 25.9 + MHL Tow Tank + 6.7 + MIT Tow Tank + 1.5 + MMA Tugboat/ Barge/ Vessel + 5.1 + Maine Tow Tank + 3 +

104

Radiative muon capture rates and the maximum photon energy  

Science Journals Connector (OSTI)

The differential photon spectrum for radiative muon capture is expanded about the average maximum photon energy km and the correction terms evaluated using for one a modified Thomas-Reiche-Kuhn sum rule, thus extending previous work for ordinary capture. The resulting rate is much less dependent on km than the usual closure result. The ratio km? appropriate for closure calculations, with ? the average neutrino energy, is determined and found to be approximately constant and, when correction terms are included, somewhat higher than values previously used. By similar techniques a consistency relation is derived which can be solved to explicitly estimate "physical" values of km and ?.NUCLEAR REACTIONS Radiative muon capture. Differential photon spectrum, relative rate for Ca40. Dipole sum rules used to correct closure approximation, obtain estimates of mean excitation energy, average maximum photon energy.

R. S. Sloboda and Harold W. Fearing

1978-11-01T23:59:59.000Z

105

When are microcircuits well-modeled by maximum entropy methods?  

E-Print Network (OSTI)

and fire. The inputs are chosen from distributions that are either gaussian, uniform, skewed, or bimodal. For each circuit, we compute the distribution on output spiking states either analytically or by sampling, approximate by a maximum entropy fit... generation is characterized by a simple static nonlinearity, or by integrate-and-fire (LIF) threshold-crossing dynamics. However, this circuit does generate substantial higher-order correlations if the common input to the three cells is bimodal. This approach...

2010-07-20T23:59:59.000Z

106

Maximum entanglement in squeezed boson and fermion states  

SciTech Connect

A class of squeezed boson and fermion states is studied with particular emphasis on the nature of entanglement. We first investigate the case of bosons, considering two-mode squeezed states. Then we construct the fermion version to show that such states are maximum entangled, for both bosons and fermions. To achieve these results, we demonstrate some relations involving squeezed boson states. The generalization to the case of fermions is made by using Grassmann variables.

Khanna, F. C. [Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada); TRIUMF, Vancouver, British Columbia V6T 2A3 (Canada); Malbouisson, J. M. C. [Instituto de Fisica, Universidade Federal da Bahia, 40210-340, Salvador, BA (Brazil); Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada); Santana, A. E. [Instituto de Fisica, Universidade de Brasilia, 70910-900, Brasilia, DF (Brazil); Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada); Santos, E. S. [Centro Federal de Educacao Tecnologica da Bahia, 40030-010, Salvador, BA (Brazil)

2007-08-15T23:59:59.000Z

107

Maximum Entry and Mandatory Separation Ages for Certain Security Employees  

Directives, Delegations, and Requirements

The policy establishes the DOE policy on maximum entry and mandatory separation ages for primary or secondary positions covered under special statutory retirement provisions and for those employees whose primary duties are the protection of officials of the United States against threats to personal safety or the investigation, apprehension, and detention of individuals suspected or convicted of offenses against the criminal laws of the United States. Admin Chg 1, dated 12-1-11, cancels DOE P 310.1.

2001-10-11T23:59:59.000Z

108

The Maximum Patch Method for Directional Dark Matter Detection  

E-Print Network (OSTI)

Present and planned dark matter detection experiments search for WIMP-induced nuclear recoils in poorly known background conditions. In this environment, the maximum gap statistical method provides a way of setting more sensitive cross section upper limits by incorporating known signal information. We give a recipe for the numerical calculation of upper limits for planned directional dark matter detection experiments, that will measure both recoil energy and angle, based on the gaps between events in two-dimensional phase space.

Shawn Henderson; Jocelyn Monroe; Peter Fisher

2008-01-10T23:59:59.000Z

109

Maximum patch method for directional dark matter detection  

SciTech Connect

Present and planned dark matter detection experiments search for WIMP-induced nuclear recoils in poorly known background conditions. In this environment, the maximum gap statistical method provides a way of setting more sensitive cross section upper limits by incorporating known signal information. We give a recipe for the numerical calculation of upper limits for planned directional dark matter detection experiments, that will measure both recoil energy and angle, based on the gaps between events in two-dimensional phase space.

Henderson, Shawn; Monroe, Jocelyn; Fisher, Peter [Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Laboratory for Nuclear Science, MIT Kavli Institute for Astrophysics and Space Research, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2008-07-01T23:59:59.000Z

110

Maximum entropy method for reconstruction of the CMB images  

E-Print Network (OSTI)

We propose a new approach for the accurate reconstruction of cosmic microwave background distributions from observations containing in addition to the primary fluctuations the radiation from unresolved extragalactic point sources and pixel noise. The approach uses some effective realizations of the well-known maximum entropy method and principally takes into account {\\it a priori} information about finiteness and spherical symmetry of the power spectrum of the CMB satisfying the Gaussian statistics.

A. T. Bajkova

2002-05-21T23:59:59.000Z

111

When Crime Pays: Measuring Judicial Efficacy against Corruption in Brazil  

E-Print Network (OSTI)

for now - crime pays in Brazil. Paginal5de27 ReferencesEfficacy against Corruption in Brazil Carlos Higino Ribeiroa widespread perception in Brazil that civil servants caught

Ribeiro de Alencar, Carlos Higino; Gico, Ivo Jr.

2010-01-01T23:59:59.000Z

112

Property:Maximum Wave Length(m) | Open Energy Information  

Open Energy Info (EERE)

Wave Length(m) Wave Length(m) Jump to: navigation, search Property Name Maximum Wave Length(m) Property Type String Pages using the property "Maximum Wave Length(m)" Showing 18 pages using this property. A Alden Small Flume + Variable + Alden Wave Basin + 1.8 + C Carderock Maneuvering & Seakeeping Basin + 12.2 + Carderock Tow Tank 2 + 12.2 + Carderock Tow Tank 3 + 12.2 + D Davidson Laboratory Tow Tank + 15.2 + DeFrees Large Wave Basin + 64 + DeFrees Small Wave Basin + 30 + H Haynes Wave Basin + 10.7 + L Lakefront Tow Tank + 22 + M MIT Tow Tank + 4.6 + O OTRC Wave Basin + 25 + Ohmsett Tow Tank + 18 + R Richmond Field Station Tow Tank + 2 + S SAFL Channel + 6.6 + Sandia Lake Facility + 4.57 + Sheets Wave Basin + 10 + Ship Towing Tank + 6 + Retrieved from "http://en.openei.org/w/index.php?title=Property:Maximum_Wave_Length(m)&oldid=597351

113

IEP - Water-Energy Interface: Total Maximum Daily Load Page  

NLE Websites -- All DOE Office Websites (Extended Search)

Total Maximum Daily Loads (TMDLs) Total Maximum Daily Loads (TMDLs) The overall goal of the Clean Water Act is to "restore and maintain the chemical, physical, and biological integrity of the Nation’s waters." In 1999, EPA proposed changes to Section 303(d), to establish Total Maximum Daily Loads (TMDLs) for watersheds that do not meet this goal. The TMDL is the highest amount of a given pollutant that is permissible in that body of water over a given period of time. TMDLs include both waste load allocation (WLA) for point sources and load allocations for non-point sources. In Appalachia, acid mine drainage (AMD) is the single most damaging non-point source. There is also particular concern of the atmospheric deposition of airborne sulfur, nitrogen, and mercury compounds. States are currently in the process of developing comprehensive lists of impaired waters and establishing TMDLs for those waters. EPA has recently proposed a final rule that will require states to develop TMDLs and implement plans for improving water quality within the next 10 years. Under the new rule, TMDL credits could be traded within a watershed.

114

Cost-Efficacy in Wetland Restoration Projects in Coastal Louisiana  

E-Print Network (OSTI)

ARTICLE Cost-Efficacy in Wetland Restoration Projects in Coastal Louisiana Joy Merino & Christiane, such as wetland loss, influence CWPPRA project selection for funding. We found that the program was selecting cost- effective projects overall. Cost efficacy varied significantly by restoration project type, with barrier

115

Maximum likelihood reconstruction for the Daya Bay Experiment  

E-Print Network (OSTI)

The Daya Bay Reactor Neutrino experiment is designed to precisely determine the neutrino mixing angle theta13. In this paper, we report a maximum likelihood (ML) method to reconstruct the vertex and energy of events in the anti-neutrino detector, based on a simplified optical model that describes light propagation. We calibrate the key paramters of the optical model with Co60 source, by comparing the predicted charges of the PMTs with the observed charges. With the optimized parameters, the resolution of the vertex reconstruction is about 25cm for Co60 gamma.

Xia Dongmei

2014-03-07T23:59:59.000Z

116

Pollution Impact on Cool Roof Efficacy Research Project | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Emerging Technologies » Pollution Impact on Cool Roof Efficacy Emerging Technologies » Pollution Impact on Cool Roof Efficacy Research Project Pollution Impact on Cool Roof Efficacy Research Project The Department of Energy (DOE) is currently determining how pollution impacts the efficacy of cool roofs. The project specifically is focusing on the efficacy of white roofs in Northern India. The first phase of the project will take physical measurements to characterize the cooling and climate effects of white roofs. Results from this project will provide important guidance to policymakers and planners as they decide where cool roofs would have the greatest benefits. Project Description The project involves the development of advanced surfaces and next-generation materials to improve solar reflectance of roofs; the ability to reflect the visible, infrared and ultraviolet wavelengths of the

117

Location of Maximum Credible Beam Losses in LCLS Injector  

SciTech Connect

The memo describes the maximum credible beam the LCLS injector can produce and lose at various locations along the beamline. The estimation procedure is based upon three previous reports [1, 2, 3]. While specific numbers have been updated to accurately reflect the present design parameters, the conclusions are very similar to those given in Ref 1. The source of the maximum credible beam results from the explosive electron emission from the photocathode if the drive laser intensity exceeds the threshold for plasma production. In this event, the gun's RF field can extract a large number of electrons from this plasma which are accelerated out of the gun and into the beamline. This electron emission persists until it has depleted the gun of all its energy. Hence the number of electrons emitted per pulse is limited by the amount of stored RF energy in the gun. It needs to be emphasized that this type of emission is highly undesirable, as it causes permanent damage to the cathode.

Mao, Stan

2010-12-13T23:59:59.000Z

118

Ionization and maximum energy of nuclei in shock acceleration theory  

E-Print Network (OSTI)

We study the acceleration of heavy nuclei at SNR shocks when the process of ionization is taken into account. Heavy atoms ($Z_N >$ few) in the interstellar medium which start the diffusive shock acceleration (DSA) are never fully ionized at the moment of injection. The ionization occurs during the acceleration process, when atoms already move relativistically. For typical environment around SNRs the photo-ionization due to the background galactic radiation dominates over Coulomb collisions. The main consequence of ionization is the reduction of the maximum energy which ions can achieve with respect to the standard result of the DSA. In fact the photo-ionization has a timescale comparable to the beginning of the Sedov-Taylor phase, hence the maximum energy is no more proportional to the nuclear charge, as predicted by standard DSA, but rather to the effective ions' charge during the acceleration process, which is smaller than the total nuclear charge $Z_N$. This result can have a direct consequence in the pred...

Morlino, Giovanni

2011-01-01T23:59:59.000Z

119

Boiler Maximum Achievable Control Technology (MACT) Technical Assistance- Fact Sheet, May 2014  

Energy.gov (U.S. Department of Energy (DOE))

Fact sheet about the Boiler Maximum Achievable Control Technology (MACT) Technical Assistance Program

120

Diffusion maximum as a function of size in dense liquids  

Science Journals Connector (OSTI)

We study the diffusion of small guest particles of different sizes in a host fluid at liquid densities using molecular dynamics simulations. We observe an enhancement of the diffusivity of guest particles for a size related to the structure of the void space of the host fluid, analogous to the levitation effect observed for guest diffusion in porous solids. Friction and activation energy are found to be minimum for the guest size with maximum self-diffusivity. Wavelength dependent self-diffusivity indicates a monotonic and oscillatory dependence on wave number k for anomalous and linear regimes, respectively. These are associated with single and bi-exponential decay of the incoherent intermediate scattering function.

Pradip Kr. Ghorai; A. V. Anil Kumar; Srikanth Sastry; S. Yashonath

2005-09-16T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Maximum-Likelihood Continuity Mapping (MALCOM): An Alternative to HMMs  

SciTech Connect

The authors describe Maximum-Likelihood Continuity Mapping (MALCOM) as an alternative to hidden Markov models (HMMs) for processing sequence data such as speech. While HMMs have a discrete ''hidden'' space constrained by a fixed finite-automata architecture, MALCOM has a continuous hidden space (a continuity map) that is constrained only by a smoothness requirement on paths through the space. MALCOM fits into the same probabilistic framework for speech recognition as HMMs, but it represents a far more realistic model of the speech production process. The authors support this claim by generating continuity maps for three speakers and using the resulting MALCOM paths to predict measured speech articulator data. The correlations between the MALCOM paths (obtained from only the speech acoustics) and the actual articulator movements average 0.77 on an independent test set not used to train MALCOM nor the predictor. On average, this unsupervised model achieves 92% of performance obtained using the corresponding supervised method.

Nix, D.A.; Hogden, J.E.

1998-12-01T23:59:59.000Z

122

Maximum Entropy Principle and the Higgs boson mass  

Science Journals Connector (OSTI)

Abstract A successful connection between Higgs boson decays and the Maximum Entropy Principle is presented. Based on the information theory inference approach we determine the Higgs boson mass as M H = 125.04 0.25 GeV , a value fully compatible to the LHC measurement. This is straightforwardly obtained by taking the Higgs boson branching ratios as the target probability distributions of the inference, without any extra assumptions beyond the Standard Model. Yet, the principle can be a powerful tool in the construction of any model affecting the Higgs sector. We give, as an example, the case where the Higgs boson has an extra invisible decay channel within a Higgs portal model.

Alexandre Alves; Alex G. Dias; Roberto da Silva

2014-01-01T23:59:59.000Z

123

Reduction in maximum time uncertainty of paired time signals  

DOE Patents (OSTI)

Reduction in the maximum time uncertainty (t/sub max/ - t/sub min/) of a series of paired time signals t/sub 1/ and t/sub 2/ varying between two input terminals and representative of a series of single events where t/sub 1/ less than or equal to t/sub 2/ and t/sub 1/ + t/sub 2/ equals a constant, is carried out with a circuit utilizing a combination of OR and AND gates as signal selecting means and one or more time delays to increase the minimum value (t/sub min/) of the first signal t/sub 1/ closer to t/sub max/ and thereby reduce the difference. The circuit may utilize a plurality of stages to reduce the uncertainty by factors of 20 to 800.

Theodosiou, G.E.; Dawson, J.W.

1981-02-11T23:59:59.000Z

124

Maximum Likelihood Analysis of Low Energy CDMS II Germanium Data  

E-Print Network (OSTI)

We report on the results of a search for a Weakly Interacting Massive Particle (WIMP) signal in low-energy data of the Cryogenic Dark Matter Search (CDMS~II) experiment using a maximum likelihood analysis. A background model is constructed using GEANT4 to simulate the surface-event background from $^{210}$Pb decay-chain events, while using independent calibration data to model the gamma background. Fitting this background model to the data results in no statistically significant WIMP component. In addition, we perform fits using an analytic ad hoc background model proposed by Collar and Fields, who claimed to find a large excess of signal-like events in our data. We confirm the strong preference for a signal hypothesis in their analysis under these assumptions, but excesses are observed in both single- and multiple-scatter events, which implies the signal is not caused by WIMPs, but rather reflects the inadequacy of their background model.

Agnese, R; Balakishiyeva, D; Thakur, R Basu; Bauer, D A; Billard, J; Borgland, A; Bowles, M A; Brandt, D; Brink, P L; Bunker, R; Cabrera, B; Caldwell, D O; Cerdeno, D G; Chagani, H; Chen, Y; Cooley, J; Cornell, B; Crewdson, C H; Cushman, P; Daal, M; Di Stefano, P C F; Doughty, T; Esteban, L; Fallows, S; Figueroa-Feliciano, E; Fritts, M; Godfrey, G L; Golwala, S R; Graham, M; Hall, J; Harris, H R; Hertel, S A; Hofer, T; Holmgren, D; Hsu, L; Huber, M E; Jastram, A; Kamaev, O; Kara, B; Kelsey, M H; Kennedy, A; Kiveni, M; Koch, K; Leder, A; Loer, B; Asamar, E Lopez; Mahapatra, R; Mandic, V; Martinez, C; McCarthy, K A; Mirabolfathi, N; Moffatt, R A; Moore, D C; Nelson, R H; Oser, S M; Page, K; Page, W A; Partridge, R; Pepin, M; Phipps, A; Prasad, K; Pyle, M; Qiu, H; Rau, W; Redl, P; Reisetter, A; Ricci, Y; Rogers, H E; Saab, T; Sadoulet, B; Sander, J; Schneck, K; Schnee, R W; Scorza, S; Serfass, B; Shank, B; Speller, D; Upadhyayula, S; Villano, A N; Welliver, B; Wright, D H; Yellin, S; Yen, J J; Young, B A; Zhang, J

2014-01-01T23:59:59.000Z

125

Probable maximum flood control; Yucca Mountain Site Characterization Project  

SciTech Connect

This study proposes preliminary design concepts to protect the waste-handling facilities and all shaft and ramp entries to the underground from the probable maximum flood (PMF) in the current design configuration for the proposed Nevada Nuclear Waste Storage Investigation (NNWSI) repository protection provisions were furnished by the United States Bureau of Reclamation (USSR) or developed from USSR data. Proposed flood protection provisions include site grading, drainage channels, and diversion dikes. Figures are provided to show these proposed flood protection provisions at each area investigated. These areas are the central surface facilities (including the waste-handling building and waste treatment building), tuff ramp portal, waste ramp portal, men-and-materials shaft, emplacement exhaust shaft, and exploratory shafts facility.

DeGabriele, C.E.; Wu, C.L. [Bechtel National, Inc., San Francisco, CA (United States)

1991-11-01T23:59:59.000Z

126

Fracture Toughness and Maximum Stress in a Disordered Lattice System  

E-Print Network (OSTI)

Fracture in a disordered lattice system is studied. In our system, particles are initially arranged on the triangular lattice and each nearest-neighbor pair is connected with a randomly chosen soft or hard Hookean spring. Every spring has the common threshold of stress at which it is cut. We make an initial crack and expand the system perpendicularly to the crack. We find that the maximum stress in the stress-strain curve is larger than those in the systems with soft or hard springs only (uniform systems). Energy required to advance fracture is also larger in some disordered systems, which indicates that the fracture toughness improves. The increase of the energy is caused by the following two factors. One is that the soft spring is able to hold larger energy than the hard one. The other is that the number of cut springs increases as the fracture surface becomes tortuous in disordered systems.

Chiyori Urabe; Shinji Takesue

2008-12-29T23:59:59.000Z

127

A new scanning photoemission microscope for ELETTRA: SuperMAXIMUM  

Science Journals Connector (OSTI)

High brightness third?generation synchrotrons allow diffraction?limited performance and large flux for scanning photoemission microscopes. A new microscope SuperMAXIMUM is being developed at the University of Wisconsin Center for X ray Lithography in collaboration with the Sincrotrone Trieste. The beamline being built in Trieste uses a variable angle spherical gratingmonochromator (VASGM). A combination of rotation of a plane mirror and rotation of the spherical grating keeps the slit positions and beam directions fixed. The microscope objectives are normal?incidence multilayer?coated Schwarzschild objectives. The project which is nearing completion utilizes novel designs for optics alignment sample rastering mechanics and software control. We will discuss the project status new designs and techniques.

John T. Welnak; H. Solak; J. Wallace; F. Cerrina; F. Barbo; M. Bertolo; A. Bianco; S. Di Fonzo; S. Fontana; W. Jark; F. Mazzolini; R. Rosei; A. Savoia; J.H. Underwood; G. Margaritondo

1996-01-01T23:59:59.000Z

128

A new scanning photoemission microscope for ELETTRA: SuperMAXIMUM  

SciTech Connect

High brightness, third-generation synchrotrons allow diffraction-limited performance and large flux for scanning photoemission microscopes. A new microscope, SuperMAXIMUM, is being developed at the University of Wisconsin Center for X ray Lithography in collaboration with the Sincrotrone Trieste. The beamline, being built in Trieste, uses a variable angle spherical grating monochromator (VASGM). A combination of rotation of a plane mirror and rotation of the spherical grating keeps the slit positions and beam directions fixed. The microscope objectives are normal-incidence, multilayer-coated Schwarzschild objectives. The project, which is nearing completion, utilizes novel designs for optics alignment, sample rastering mechanics, and software control. We will discuss the project status, new designs, and techniques. {copyright} {ital 1996 American Institute of Physics.}

Welnak, J.T.; Solak, H.; Wallace, J.; Cerrina, F.; Barbo, F.; Bertolo, M.; Bianco, A.; Di Fonzo, S.; Fontana, S.; Jark, W.; Mazzolini, F.; Rosei, R.; Savoia, A.; Underwood, J.; Margaritondo, G. [University of WI--Center for X ray Lithography, 3731 Schneider Drive, Stoughton, WI 53589 (United States)] [University of WI--Center for X ray Lithography, 3731 Schneider Drive, Stoughton, WI 53589 (United States); [Sincrotrone Trieste, Padriciano 99, 34012, Trieste (Italy); [Lawrence Berkeley Laboratory, Center for X ray Optics, 1 Cyclotron Road, 80-101, Berkeley, CA 94720 (United States); [Institut de Physique Appliqee, Ecole Polytechnique Federale, CH-1015, Lausanne (Switzerland)

1996-09-01T23:59:59.000Z

129

Glyphosate-Based Herbicidal Ionic Liquids with Increased Efficacy  

Science Journals Connector (OSTI)

Greenhouse testing indicated that while at a higher application rate of 360 g/ha the efficacy of all the HILs was comparable to the commercial herbicide control, at a lower application rate of 180 g/ha, the efficacy of all HILs was as much as two and a half to three times higher when compared to the commercial formulation, and the dianionic glyphosates were the most effective. ... In field trials, all but one of the tested HILs demonstrated excellent efficacy. ... Laboratory regrowth tests established that the ionic liquids of glyphosate are efficiently translocated to rhizomes preventing the regrowth of plants. ...

Juliusz Pernak; Micha? Niemczak; Rafa? Giszter; Julia L. Shamshina; Gabriela Gurau; O. Andreea Cojocaru; Tadeusz Praczyk; Katarzyna Marcinkowska; Robin D. Rogers

2014-11-04T23:59:59.000Z

130

LUMINOUS INFRARED GALAXIES WITH THE SUBMILLIMETER ARRAY. IV. {sup 12}CO J = 6-5 OBSERVATIONS OF VV 114  

SciTech Connect

We present high-resolution (?2.''5) observations of {sup 12}CO J = 6-5 toward the luminous infrared galaxy VV 114 using the Submillimeter Array. We detect {sup 12}CO J = 6-5 emission from the eastern nucleus of VV 114 but do not detect the western nucleus or the central region. We combine the new {sup 12}CO J = 6-5 observations with previously published or archival low-J CO observations, which include {sup 13}CO J = 1-0 Atacama Large Millimeter/submillimeter Array cycle 0 observations, to analyze the beam-averaged physical conditions of the molecular gas in the eastern nucleus. We use the radiative transfer code RADEX and a Bayesian likelihood code to constrain the temperature (T{sub kin}), density (n{sub H{sub 2}}), and column density (N{sub {sup 1}{sup 2}CO}) of the molecular gas. We find that the most probable scenario for the eastern nucleus is a cold (T{sub kin} = 38 K), moderately dense (n{sub H{sub 2}} = 10{sup 2.89} cm{sup 3}) molecular gas component. We find that the most probable {sup 12}CO to {sup 13}CO abundance ratio ([{sup 12}CO]/[{sup 13}CO]) is 229, which is roughly three times higher than the Milky Way value. This high abundance ratio may explain the observed high {sup 12}CO/ {sup 13}CO line ratio (>25). The unusual {sup 13}CO J = 2-1/J = 1-0 line ratio of 0.6 is produced by a combination of moderate {sup 13}CO optical depths (? = 0.4-1.1) and extremely subthermal excitation temperatures. We measure the CO-to-H{sub 2} conversion factor, ?{sub CO}, to be 0.5{sup +0.6}{sub -0.3} M{sub ?} (K km s{sup 1} pc{sup 2}){sup 1}, which agrees with the widely used factor for ultra luminous infrared galaxies of Downes and Solomon (?{sub CO} = 0.8 M{sub ?} (K km s{sup 1} pc{sup 2}){sup 1})

Sliwa, Kazimierz; Wilson, Christine D. [Department of Physics and Astronomy, McMaster University, Hamilton, ON L8S 4M1 (Canada); Krips, Melanie [Institut de Radio Astronomie Millimetrique, 300 Rue de la Piscine, Domaine Universitaire, F-38406 Saint Martin d'Heres (France); Petitpas, Glen R. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Iono, Daisuke [Chile Observatory, National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Juvela, Mika [University of Helsinki, FI-00014 Helsinki (Finland); Matsushita, Satoki [Academia Sinica Institute of Astronomy and Astrophysics, P.O. Box 23-141, Taipei 10617, Taiwan (China); Peck, Alison [National Radio Astronomy Observatory, Charlottesville, VA 22903 (United States); Yun, Min, E-mail: sliwak@mcmaster.ca, E-mail: wilson@physics.mcmaster.ca, E-mail: krips@iram.fr, E-mail: gpetitpa@cfa.harvard.edu, E-mail: d.iono@nao.ac.jp, E-mail: mika.juvela@helsinki.fi, E-mail: satoki@asiaa.sinica.edu.tw, E-mail: apeck@alma.cl, E-mail: myun@astro.umass.edu [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States)

2013-11-10T23:59:59.000Z

131

Tunable THz Generation by the Interaction of a Super-luminous Laser Pulse with Biased Semiconductor Plasma  

SciTech Connect

Terahertz (THz) radiation is electromagnetic radiation in the range between several hundred and a few thousand GHz. It covers the gap between fast-wave electronics (millimeter waves) and optics (infrared). This spectral region offers enormous potential for detection of explosives and chemical/biological agents, non-destructive testing of non-metallic structural materials and coatings of aircraft structures, medical imaging, bio-sensing of DNA stretching modes and high-altitude secure communications. The development of these applications has been hindered by the lack of powerful, tunable THz sources with controlled waveform. The need for such sources is accentuated by the strong, but selective absorption of THz radiation during transmission through air with high vapor content. The majority of the current experimental work relies on time-domain spectroscopy using fast electrically biased photoconductive sources in conjunction with femto-second mode-locked Ti:Sapphire lasers. These sources known as Large Aperture Photoconductive Antennas (LAPA) have very limited tunability, relatively low upper bound of power and no bandwidth control. The paper presents a novel source of THz radiation known as Miniature Photoconductive Capacitor Array (MPCA). Experiments demonstrated tunability between .1 - 2 THz, control of the relative bandwidth {delta}f/f between .5-.01, and controlled pulse length and pulse waveform (temporal shape, chirp, pulse-to-pulse modulation etc.). Direct scaling from the current device indicates efficiency in excess of 30% at 1 THz with 1/f2 scaling at higher frequencies, peak power of 100 kW and average power between .1-1 W. The physics underlying the MPCA is the interaction of a super-luminous ionization front generated by the oblique incidence of a Ti:Sapphire laser pulse on a semiconductor crystal (ZnSe) biased with an alternating electrostatic field, similar to that of a frozen wave generator. It is shown theoretically and experimentally that the interaction results in the emission of an electromagnetic wave at the plasma frequency of the ionization front. The device resembles the well-known DARC plasma device with two significant differences. First, the frozen wave is on a semiconductor crystal and not on a gas (Azulene Vapor). Second, the ionizing front is super-luminous. These differences result in a device with superior tunability, efficiency, compactness and flexibility. The paper concludes with examples of THz imaging using the MPCA.

Papadopoulos, K. [BAE Systems-ATI, University of Maryland, College Park MD 20742 (United States); Zigler, A. [BAE Systems-ATI, Hebrew University (Israel)

2006-01-03T23:59:59.000Z

132

Microneedle delivery for improved efficacy of antiretroviral and antibiotic drugs  

E-Print Network (OSTI)

Two classes of drugs, antiretrovirals and antibiotics, could benefit greatly from delivery through microneedles. Microneedles (MN) offer an increase in efficacy for these drugs by providing delivery to the lymphatic system ...

Stauber, Zachary Jason

2012-01-01T23:59:59.000Z

133

ForPeerReview Persuasive communication and advertising efficacy for  

E-Print Network (OSTI)

ForPeerReview Persuasive communication and advertising efficacy for public health policy Research Article Keywords: Persuasive communication, Pragmatics, Social advertising, Health communication and preventive advertising. http://mc.manuscriptcentral.com/commresearch Communication Researchhalshs-00410054

Paris-Sud XI, Université de

134

SSL Pricing and Efficacy Trend Analysis for Utility Program Planning  

Energy.gov (U.S. Department of Energy (DOE))

An LED lamp or luminaire can generally be found that matches or exceeds the efficacy of benchmark technologies in a given product category, and LED products continue to expand into ever-higher...

135

NEAR-INFRARED ADAPTIVE OPTICS IMAGING OF INFRARED LUMINOUS GALAXIES: THE BRIGHTEST CLUSTER MAGNITUDE-STAR FORMATION RATE RELATION  

SciTech Connect

We have established a relation between the brightest super star cluster (SSC) magnitude in a galaxy and the host star formation rate (SFR) for the first time in the near-infrared (NIR). The data come from a statistical sample of ?40 luminous IR galaxies (LIRGs) and starbursts utilizing K-band adaptive optics imaging. While expanding the observed relation to longer wavelengths, less affected by extinction effects, it also pushes to higher SFRs. The relation we find, M{sub K} ? 2.6log SFR, is similar to that derived previously in the optical and at lower SFRs. It does not, however, fit the optical relation with a single optical to NIR color conversion, suggesting systematic extinction and/or age effects. While the relation is broadly consistent with a size-of-sample explanation, we argue physical reasons for the relation are likely as well. In particular, the scatter in the relation is smaller than expected from pure random sampling strongly suggesting physical constraints. We also derive a quantifiable relation tying together cluster-internal effects and host SFR properties to possibly explain the observed brightest SSC magnitude versus SFR dependency.

Randriamanakoto, Z.; Visnen, P. [South African Astronomical Observatory, P.O. Box 9, 7935 Observatory, Cape Town (South Africa)] [South African Astronomical Observatory, P.O. Box 9, 7935 Observatory, Cape Town (South Africa); Escala, A. [Departamento de Astronoma, Universidad de Chile, Casilla 36-D, Santiago (Chile)] [Departamento de Astronoma, Universidad de Chile, Casilla 36-D, Santiago (Chile); Kankare, E.; Kotilainen, J.; Mattila, S. [Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Vislntie 20, FI-21500 Piikki (Finland)] [Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Vislntie 20, FI-21500 Piikki (Finland); Ryder, S., E-mail: zara@saao.ac.za [Australian Astronomical Observatory, P.O. Box 915, North Ryde, NSW 1670 (Australia)

2013-10-01T23:59:59.000Z

136

Efficacy of 45 lm/W Achieved in White OLED  

Energy.gov (U.S. Department of Energy (DOE))

Universal Display Corporation (UDC) successfully demonstrated an all phosphorescent white organic light emitting diode (WOLED) with a power efficacy of 45 lm/W at 1,000 cd/m2. This high-efficacy device was enabled by lowering the device operating voltage, increasing the outcoupling efficiency to ~40% from ~20%, and by incorporating highly efficient phosphorescent emitters that are capable of converting nearly all current passing through a WOLED into light.

137

Installation of the MAXIMUM microscope at the ALS  

SciTech Connect

The MAXIMUM scanning x-ray microscope, developed at the Synchrotron Radiation Center (SRC) at the University of Wisconsin, Madison was implemented on the Advanced Light Source in August of 1995. The microscope`s initial operation at SRC successfully demonstrated the use of multilayer coated Schwarzschild objective for focusing 130 eV x-rays to a spot size of better than 0.1 micron with an electron energy resolution of 250meV. The performance of the microscope was severely limited, because of the relatively low brightness of SRC, which limits the available flux at the focus of the microscope. The high brightness of the ALS is expected to increase the usable flux at the sample by a factor of 1,000. The authors will report on the installation of the microscope on bending magnet beamline 6.3.2 at the ALS and the initial measurement of optical performance on the new source, and preliminary experiments with surface chemistry of HF etched Si will be described.

Ng, W.; Perera, R.C.C.; Underwood, J.H. [Lawrence Berkeley Lab., CA (United States); Singh, S.; Solak, H.; Cerrina, F. [Univ. of Wisconsin, Stoughton, WI (United States). Center for X-ray Lithography

1995-10-01T23:59:59.000Z

138

LANDFILL OPERATION FOR CARBON SEQUESTRATION AND MAXIMUM METHANE EMISSION CONTROL  

SciTech Connect

The work described in this report, to demonstrate and advance this technology, has used two demonstration-scale cells of size (8000 metric tons [tonnes]), sufficient to replicate many heat and compaction characteristics of larger ''full-scale'' landfills. An enhanced demonstration cell has received moisture supplementation to field capacity. This is the maximum moisture waste can hold while still limiting liquid drainage rate to minimal and safely manageable levels. The enhanced landfill module was compared to a parallel control landfill module receiving no moisture additions. Gas recovery has continued for a period of over 4 years. It is quite encouraging that the enhanced cell methane recovery has been close to 10-fold that experienced with conventional landfills. This is the highest methane recovery rate per unit waste, and thus progress toward stabilization, documented anywhere for such a large waste mass. This high recovery rate is attributed to moisture, and elevated temperature attained inexpensively during startup. Economic analyses performed under Phase I of this NETL contract indicate ''greenhouse cost effectiveness'' to be excellent. Other benefits include substantial waste volume loss (over 30%) which translates to extended landfill life. Other environmental benefits include rapidly improved quality and stabilization (lowered pollutant levels) in liquid leachate which drains from the waste.

Don Augenstein

2001-02-01T23:59:59.000Z

139

An Analysis of Teacher Self-Efficacy, Teacher Trust, and Collective Efficacy in a Southwest Texas School District  

E-Print Network (OSTI)

The purpose of the study was to investigate relationships among teacher selfefficacy, trust, and collective efficacy among teachers in a southwest Texas school district. The research included three established surveys combined to create a single...

Ball, Jeanette

2011-02-22T23:59:59.000Z

140

Probable maximum point rainfall estimation for the southern half of the Indian peninsula  

Science Journals Connector (OSTI)

Preparation of a generalized chart of probable maximum precipitation (PMP) for the southern half of the Indian peninsula lying between lat. 8N to 16N has been attempted in this study. Maximum 1-day rainfall ...

O N Dhar; A K Kulkarni; P R Rakhecha

1981-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Luminous hot accretion discs  

Science Journals Connector (OSTI)

......of the high accretion rate and efficiency; therefore...accretion discs|black hole physics|hydrodynamics|radiation...to when the accretion rate passes across 1, while the transition...to when the accretion rate passes across the critical value......

Feng Yuan

2001-06-01T23:59:59.000Z

142

Cree Sets New Benchmarks for LED Efficacy and Brightness  

Energy.gov (U.S. Department of Energy (DOE))

Cree has successfully created a cool white LED prototype that delivers 107 lm/W at 350mA. This achievement builds on the Cree EZBright LED chip platform, developed in part with prior funding support from DOE. Cree made the prototype LED under their DOE project focused on developing LED chips incorporating photonic crystal elements for improved light extraction and novel package technology for higher down-conversion efficiency compared to conventional LEDs. Based on a 1 millimeter-square chip, the new prototype LED produces white light with a CCT of 5500K and a CRI of 73. Integration of four of these prototype LEDs can produce luminous flux of more than 450 lumens.

143

Maximum Entropy and Bayesian Statistics in Crystallography: a Review of Practical Applications  

Science Journals Connector (OSTI)

The applications of the maximum entropy and Bayesian methods to problems in X-ray, neutron and electron crystallography are reviewed.

Gilmore, C.J.

1996-07-01T23:59:59.000Z

144

Intergenerational parallelism of self-efficacy: moderating variables, mediating variables, and common antecedents  

E-Print Network (OSTI)

-Efficacy????????... 77 Differences among Family Structure, Gender, and Race/Ethnicity???????????????????.. 85 Intergenerational Transmission of Self-Efficacy?????.??.. 100 Intact Family Models??????????????.??.. 101 Single Family Models...???????????...???????????.?. 53 4 Unstandardized (Standardized) Structural Coefficients for Full Model of Intergenerational Transmission of Self-Efficacy among Intact Families??..111 5 Unstandardized (Standardized) Structural Coefficients for Full Model...

Lin, Cheng-Hsien

2004-11-15T23:59:59.000Z

145

An Improved Maximum Likelihood Formulation for Accurate Genome Assembly Aditya Varma, Abhiram Ranade and Srinivas Aluru  

E-Print Network (OSTI)

An Improved Maximum Likelihood Formulation for Accurate Genome Assembly Aditya Varma, Abhiram maximum likelihood method for genome assembly. We formulate the problem as one of direct convex estimate of the length of the genome or the need to use further expectation minimization to predict

Ranade, Abhiram G.

146

A 6/5-approximation algorithm for the maximum 3-cover problem  

Science Journals Connector (OSTI)

In the maximum cover problem, we are given a collection of sets over a ground set of elements and a positive integer w, and we are asked to compute a collection of at most w sets whose union contains the maximum ...

Ioannis Caragiannis; Gianpiero Monaco

2013-01-01T23:59:59.000Z

147

A Basic Thermodynamic Derivation of the Maximum Overburden Pressure Generated in Frost Heave  

E-Print Network (OSTI)

can derive the maximum overburden pressure. A similar argument can also produce the maximum Heave Engine Frost heave is a common environmental process in which the freezing of water into ice can produce forces large enough to seriously damage roads and bridges [1]. Contrary to common belief, frost

Libbrecht, Kenneth G.

148

LANGMUIR WAVE ACTIVITY: COMPARING THE ULYSSES SOLAR MINIMUM AND SOLAR MAXIMUM ORBITS  

E-Print Network (OSTI)

). The top three panels correspond to the southern segment of the solar minimum orbit; repeated passesLANGMUIR WAVE ACTIVITY: COMPARING THE ULYSSES SOLAR MINIMUM AND SOLAR MAXIMUM ORBITS R. J at the electron plasma frequency) during the solar minimum and solar maximum orbits of Ulysses. At high latitudes

California at Berkeley, University of

149

Comparison of VLF Wave Activity in the Solar Wind During Solar Maximum and Minimum  

E-Print Network (OSTI)

second fast latitude scan (near the solar maximum) with the wave observations during the first fast Experiments (URAP) of Ulysses during its first orbit, which occurred when the solar activity was approachingComparison of VLF Wave Activity in the Solar Wind During Solar Maximum and Minimum: Ulysses

California at Berkeley, University of

150

On the duration of the Paleocene-Eocene thermal maximum Ursula Rohl and Thomas Westerhold  

E-Print Network (OSTI)

On the duration of the Paleocene-Eocene thermal maximum (PETM) Ursula Ro¨hl and Thomas Westerhold of California, Santa Cruz, California 95064, USA [1] The Paleocene-Eocene thermal maximum (PETM) is one of global warming and a massive perturbation of the global carbon cycle from injection of isotopically light

Zachos, James

151

Vegetation and Fire at the Last Glacial Maximum in Tropical South America  

E-Print Network (OSTI)

Chapter 4 Vegetation and Fire at the Last Glacial Maximum in Tropical South America Francis E temperatures. Keywords Charcoal · Last Glacial Maximum · pollen · Quaternary · tropical South America F-mail: Francis.Mayle@ed.ac.uk 89F. Vimeux et al. (eds.), Past Climate Variability in South America

Binford, Michael W.

152

Low-energy particle response to CMEs during the Ulysses solar maximum northern polar passage  

E-Print Network (OSTI)

Low-energy particle response to CMEs during the Ulysses solar maximum northern polar passage D. Reisenfeld, and T. R. Sanderson (2004), Low-energy particle response to CMEs during the Ulysses solar maximum, New Mexico, USA T. R. Sanderson Research and Scientific Support Department of European Space Agency

Sanahuja, Blai

153

Use of Two Distillation Columns in Systems with Maximum Temperature Limitations  

E-Print Network (OSTI)

Use of Two Distillation Columns in Systems with Maximum Temperature Limitations Rebecca H. Masel, Pennsylvania 18015, United States ABSTRACT: Maximum temperature limitations are encountered in distillation of the bottoms product fixes the column base pressure and, hence, the condenser pressure. The distillate

Gilchrist, James F.

154

An Optimal Randomized Algorithm for Maximum Tukey Depth Timothy M. Chan  

E-Print Network (OSTI)

An Optimal Randomized Algorithm for Maximum Tukey Depth Timothy M. Chan Abstract We present the first optimal algorithm to compute the maximum Tukey depth (also known as location or halfspace depth , the Tukey depth of a point q IRd is defined as: min{|P | : over all halfspaces containing q}. We

Chan, Timothy M.

155

High order maximum principle preserving semi-Lagrangian finite difference WENO schemes for the Vlasov equation  

Science Journals Connector (OSTI)

In this paper, we propose the parametrized maximum principle preserving (MPP) flux limiter, originally developed in [37], to the semi-Lagrangian finite difference weighted essentially non-oscillatory scheme for solving the Vlasov equation. The MPP flux ... Keywords: Finite difference WENO scheme, Maximum principle preserving, Parametrized flux limiter, Semi-Lagrangian method, Vlasov equation

Tao Xiong, Jing-Mei Qiu, Zhengfu Xu, Andrew Christlieb

2014-09-01T23:59:59.000Z

156

Beating the maximum cooling limit with graded thermoelectric materials Zhixi Bian and Ali Shakouria  

E-Print Network (OSTI)

.1063/1.2396895 The maximum cooling temperature is one of the perfor- mance parameters for a thermoelectric module. ExcludingBeating the maximum cooling limit with graded thermoelectric materials Zhixi Bian and Ali Shakouria cooling of a single element thermoelectric material cannot be improved by changing its geometry.3

157

Frequency Moments Inverse Problem and Maximum (Shannon vs. R enyi-Tsallis) Entropy  

E-Print Network (OSTI)

) maximization of Shannon's entropy (MaxEnt), b) maximization of R#19;enyi-Tsallis entropy (maxTent). ConcerningEnt 4 1.2 Aims 5 2 Frequency moment constraints 5 2.1 Characteristics of MaxEnt choice 6 2.2 Maximum RFrequency Moments Inverse Problem and Maximum (Shannon vs. R#19;enyi-Tsallis) Entropy #3; A case

158

SSL Pricing and Efficacy Trend Analysis for Utility Program Planning  

SciTech Connect

An LED lamp or luminaire can generally be found that matches or exceeds the efficacy of benchmark technologies in a given product category, and LED products continue to expand into ever-higher lumen output niches. However, the price premium for LED continues to pose a barrier to adoption in many applications, in spite of expected savings from reduced energy use and maintenance. Other factorssuch as dimmability and quality of lightcan also present challenges. The appropriate type, timing, and magnitude of energy efficiency activities will vary from organization to organization based on local variables and the method of evaluation. A number of factors merit consideration when prioritizing activities for development. Category-specific projections for pricing and efficacy are provided herein to assist in efficiency program planning efforts.

Tuenge, Jason R.

2013-10-01T23:59:59.000Z

159

"Table A52. Nonswitchable Minimum Requirements and Maximum Consumption"  

U.S. Energy Information Administration (EIA) Indexed Site

2. Nonswitchable Minimum Requirements and Maximum Consumption" 2. Nonswitchable Minimum Requirements and Maximum Consumption" " Potential by Census Region, 1991" " (Estimates in Physical Units)" ,,,,"RSE" ,"Actual","Minimum","Maximum","Row" "Type of Energy","Consumption","Consumption(a)","Consumption(b)","Factors" "RSE Column Factors:",1,1.2,0.8 ," Total United States" ,"-","-","-" "Electricity Receipts(c) (million kilowatthours)",718480,701478,766887,2 "Natural Gas (billion cubic feet)",5345,3485,5887,2 "Distillate Fuel Oil (thousand barrels)",23885,19113,201081,3.7 "Residual Fuel Oil (thousand barrels)",65837,36488,201921,2.6

160

Matching of photovolatic motor-pump systems for maximum efficiency operation  

Science Journals Connector (OSTI)

A PV array is a nonlinear d.c. source and its operation has to be carefully matched to that of its equivalent electrical load in order to extract the maximum available energy. Two PV pumping schemes are investigated to get the maximum gross mechanical power. The system based on the separately-excited d.c. motor is matched through the control of the motor excitation, while for the system based on the induction motor, the voltage source inverter frequency is controlled by maximum mechanical power operation.

Aziza M. Zaki; Mona N. Eskander

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

LUMINOUS SUPERNOVA-LIKE UV/OPTICAL/INFRARED TRANSIENTS ASSOCIATED WITH ULTRA-LONG GAMMA-RAY BURSTS FROM METAL-POOR BLUE SUPERGIANTS  

SciTech Connect

Metal-poor massive stars typically end their lives as blue supergiants (BSGs). Gamma-ray bursts (GRBs) from such progenitors could have an ultra-long duration of relativistic jets. For example, Population III (Pop III) GRBs at z {approx} 10-20 might be observable as X-ray-rich events with a typical duration of T{sub 90} {approx} 10{sup 4}(1 + z) s. The recent GRB111209A at z = 0.677 has an ultra-long duration of T{sub 90} {approx} 2.5 Multiplication-Sign 10{sup 4} s and it has been suggested that its progenitor might have been a metal-poor BSG in the local universe. Here, we suggest that luminous UV/optical/infrared emission is associated with this new class of GRBs from metal-poor BSGs. Before the jet head breaks out of the progenitor envelope, the energy injected by the jet is stored in a hot plasma cocoon, which finally emerges and expands as a baryon-loaded fireball. We show that the photospheric emissions from the cocoon fireball could be intrinsically very bright (L{sub peak} {approx} 10{sup 42}-10{sup 44} erg s{sup -1}) in UV/optical bands ({epsilon}{sub peak} {approx} 10 eV) with a typical duration of {approx}100 days in the rest frame. Such cocoon emissions from Pop III GRBs might be detectable in infrared bands at {approx}years after Pop III GRBs at up to z {approx} 15 by upcoming facilities such as the James Webb Space Telescope. We also suggest that GRB111209A might have been rebrightening in UV/optical bands up to an AB magnitude of {approx}< 26. The cocoon emission from local metal-poor BSGs might have been observed previously as luminous supernovae without GRBs since they can be seen from the off-axis direction of the jet.

Kashiyama, Kazumi; Yajima, Hidenobu [Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States); Nakauchi, Daisuke; Nakamura, Takashi [Department of Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502 (Japan); Suwa, Yudai, E-mail: kzk15@psu.edu [Yukawa Institute for Theoretical Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502 (Japan)

2013-06-10T23:59:59.000Z

162

The Nature of Nearby Counterparts to Intermediate-Redshift Luminous Compact Blue Galaxies. III. Interferometric Observations of Neutral Atomic and Molecular Gas  

E-Print Network (OSTI)

We present the results of a VLA and OVRO-MMA follow-up to our single-dish surveys of the neutral atomic and molecular gas in a sample of nearby Luminous Compact Blue Galaxies (LCBGs). These luminous, blue, high surface brightness, starbursting galaxies were selected using criteria similar to that used to define LCBGs at higher redshifts. The surveys were undertaken to study the nature and evolutionary possibilities of LCBGs, using dynamical masses and gas depletion time scales as constraints. Here we present nearly resolved VLA H I maps of four LCBGs, as well as results from the literature for a fifth LCBG. In addition, we present OVRO-MMA maps of CO(J=1-0) in two of these LCBGs. We have used the resolved H I maps to separate the H I emission from target galaxies and their companions to improve the accuracy of our gas and dynamical mass estimates. For this sub-sample of LCBGs, we find that the dynamical masses measured with the single-dish telescope and interferometer are in agreement. However, we find that we have overestimated the mass of H I in two galaxies by a significant amount, possibly as much as 75%, when compared to the single-dish estimates. These two galaxies have companions within a few arc minutes; we find that our single-dish and interferometric measurements of H I masses are in reasonable agreement for galaxies with more distant companions. The H I velocity fields indicate that all five galaxies are clearly rotating yet distorted, likely due to recent interactions. Our measurements of the gas and dynamical masses of LCBGs point towards evolution into low mass galaxies such as dwarf ellipticals, irregulars, and low mass spirals, consistent with studies of LCBGs at higher redshifts.

C. A. Garland; D. J. Pisano; J. P. Williams; R. Guzman; F. J. Castander; L. J. Sage

2007-08-20T23:59:59.000Z

163

Maximum one-day point rainfall estimation for North Indian plains using district average rainfall ratios  

Science Journals Connector (OSTI)

A quick and simple procedure has been developed for evaluating maximum point rainfall for different return periods for any ... to different return periods. The estimates of point rainfall obtained by this procedu...

O. N. Dhar; A. K. Kulkarni; P. R. Rakhecha

1980-01-01T23:59:59.000Z

164

Delay Analysis of Maximum Weight Scheduling in Wireless Ad Hoc Networks  

E-Print Network (OSTI)

This paper studies delay properties of the well-known maximum weight scheduling algorithm in wireless ad hoc networks. We consider wireless networks with either one-hop or multihop flows. Specifically, this paper shows ...

Modiano, Eytan H.

165

E-Print Network 3.0 - analog fixed maximum Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

SUBGROUPS OF A FREE GROUP Summary: , by the Bestvina-Handel Theorem, and if H has rank exactly n, then H is said to be a maximum-rank 1-auto-fixed... subgroup of F, and...

166

Delineation of the Indo-Malayan Centre of Maximum Marine Biodiversity: The Coral Triangle  

Science Journals Connector (OSTI)

The ranges of many tropical marine species overlap in a centre of maximum marine biodiversity, which is located in the Indo-Malayan ... efforts involve the establishment of a network of Marine Protected Areas (MP...

Bert W. Hoeksema

2007-01-01T23:59:59.000Z

167

Achieving Consistent Maximum Brake Torque with Varied Injection Timing in a DI Diesel Engine  

E-Print Network (OSTI)

, the characteristics of combustion for swept injection timings along the maximum brake torque plateau are determined. The research is conducted by varying injection timing at constant engine speed and load while measuring engine emissions and in-cylinder pressure...

Kroeger, Timothy H

2013-09-19T23:59:59.000Z

168

Wind Mixing and Restratification in a Lake near the Temperature of Maximum Density  

Science Journals Connector (OSTI)

The cooling of a freshwater take provides an opportunity for studying wind mixing and restratification under the peculiar conditions associated with a density maximum. The concepts are explored using a mixing-layer model that incorporates both ...

David M. Farmer; Eddy Carmack

1981-11-01T23:59:59.000Z

169

Investment Options TFLIC Guaranteed Pooled Fund seeks to provide maximum yield  

E-Print Network (OSTI)

Investment Options TFLIC Guaranteed Pooled Fund seeks to provide maximum yield consistent Financial Life Insurance Company (TFLIC) that invests in a diverse pool of high quality fixed: Galliard Capital Management Transamerica Partners Core Bond invests primarily in investment grade debt

Meyers, Steven D.

170

Tropical climate variability from the last glacial maximum to the present  

E-Print Network (OSTI)

This thesis evaluates the nature and magnitude of tropical climate variability from the Last Glacial Maximum to the present. The temporal variability of two specific tropical climate phenomena is examined. The first is the ...

Dahl, Kristina Ariel

2005-01-01T23:59:59.000Z

171

Atlantic Ocean circulation at the last glacial maximum : inferences from data and models  

E-Print Network (OSTI)

This thesis focuses on ocean circulation and atmospheric forcing in the Atlantic Ocean at the Last Glacial Maximum (LGM, 18-21 thousand years before present). Relative to the pre-industrial climate, LGM atmospheric CO? ...

Dail, Holly Janine

2012-01-01T23:59:59.000Z

172

Variable-Speed Wind Generator System with Maximum Output Power Control  

Science Journals Connector (OSTI)

To achieve maximum output power from wind generator systems, the rotational speed of wind generators should be adjusted in real time according to natural wind speed. This chapter pays attention to an optimum rota...

Yoko Amano

2013-01-01T23:59:59.000Z

173

Heterogeneity-corrected vs -uncorrected critical structure maximum point doses in breast balloon brachytherapy  

SciTech Connect

Recent studies have reported potentially clinically meaningful dose differences when heterogeneity correction is used in breast balloon brachytherapy. In this study, we report on the relationship between heterogeneity-corrected and -uncorrected doses for 2 commonly used plan evaluation metrics: maximum point dose to skin surface and maximum point dose to ribs. Maximum point doses to skin surface and ribs were calculated using TG-43 and Varian Acuros for 20 patients treated with breast balloon brachytherapy. The results were plotted against each other and fit with a zero-intercept line. Max skin dose (Acuros) = max skin dose (TG-43) ? 0.930 (R{sup 2} = 0.995). The average magnitude of difference from this relationship was 1.1% (max 2.8%). Max rib dose (Acuros) = max rib dose (TG-43) ? 0.955 (R{sup 2} = 0.9995). The average magnitude of difference from this relationship was 0.7% (max 1.6%). Heterogeneity-corrected maximum point doses to the skin surface and ribs were proportional to TG-43-calculated doses. The average deviation from proportionality was 1%. The proportional relationship suggests that a different metric other than maximum point dose may be needed to obtain a clinical advantage from heterogeneity correction. Alternatively, if maximum point dose continues to be used in recommended limits while incorporating heterogeneity correction, institutions without this capability may be able to accurately estimate these doses by use of a scaling factor.

Kim, Leonard, E-mail: kimlh@umdnj.edu [Department of Radiation Oncology, Cancer Institute of New Jersey, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, New Brunswick, NJ (United States); Narra, Venkat; Yue, Ning [Department of Radiation Oncology, Cancer Institute of New Jersey, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, New Brunswick, NJ (United States)

2013-07-01T23:59:59.000Z

174

Polymeric Microcapsules of Cyanazine:? Preparation and Evaluation of Efficacy  

Science Journals Connector (OSTI)

Pesticide efficacy studies on five weed species (barnyardgrass, smallflower morningglory, crowfootgrass, Florida beggarweed, and Palmer amaranth) were conducted under greenhouse conditions over a period of 12 weeks for study 1 and 25 weeks for study 2, using the commercial formulation Bladex 90 DF for comparison purposes. ... The treated flats were placed in a greenhouse with day length maintained at approximately 14 h by natural or supplemental fluorescent lighting (80-W double fluorescent tubes 8 feet in length) and the temperature ranging from 20 to 34 C. ...

Oliver D. Dailey, Jr.; Clyde C. Dowler

1998-08-22T23:59:59.000Z

175

On the "viscosity maximum" during the uniaxial extension of a low density polyethylene  

E-Print Network (OSTI)

An experimental investigation of the viscosity overshoot phenomenon observed during uniaxial extension of a low density polyethylene is pre- sented. For this purpose, traditional integral viscosity measurements on a Muenstedt type extensional rheometer are combined with local mea- surements based on the in-situ visualization of the sample under exten- sion. For elongational experiments at constant strain rates within a wide range of Weissenberg numbers (Wi), three distinct deformation regimes are identified. Corresponding to low values of Wi (regime I), the tensile stress displays a broad maximum. This maximum can be explained by simple mathematical arguments as a result of low deformation rates and it should not be confused with the viscosity overshoot phenomenon. Corre- sponding to intermediate values of Wi (regime II), a local maximum of the integral extensional viscosity is systematically observed. However, within this regime, the local viscosity measurements reveal no maximum, but a plateau. Careful inspection of the images of samples within this regime shows that, corresponding to the maximum of the integral viscosity, sec- ondary necks develop along the sample. The emergence of a maximum of the integral elongational viscosity is thus related to the distinct in- homogeneity of deformation states and is not related to the rheological properties of the material. In the fast stretching limit (high Wi, regime III), the overall geometric uniformity of the sample is well preserved, no secondary necks are observed and both the integral and the local transient elongational viscosity show no maximum. A detailed comparison of the experimental findings with results from literature is presented.

Teodor I. Burghelea; Zdenek Stary; Helmut Muenstedt

2010-01-13T23:59:59.000Z

176

An Investigation of the Effect of After-Action Reviews on Teams' Performance-Efficacy Relationships  

E-Print Network (OSTI)

work has provided strong evidence that past performance is a better predictor of future performance than self-efficacy and that self- efficacy explains very little variance in future performance when examined longitudinally after controlling for past...?s assessment of its efficacy will be more congruent with its actual past performance of the task and as such, can be used more effectively by the team in allocating resources in pursuit of successful task performance. For example, a team that performs poorly...

Schurig, Ira

2012-07-16T23:59:59.000Z

177

Factors affecting toxicity and efficacy of polymeric nanomedicines  

SciTech Connect

Nanomedicine is the application of nanotechnology to medicine. The purpose of this article is to review common characteristics of polymeric nanomedicines with respect to passive targeting. We consider several biodegradable polymeric nanomedicines that are between 1 and 100 nm in size, and discuss the impact of this technology on efficacy, pharmacokinetics, toxicity and targeting. The degree of toxicity of polymeric nanomedicines is strongly influenced by the biological conditions of the local environment, which influence the rate of degradation or release of polymeric nanomedicines. The dissemination of polymeric nanomedicines in vivo depends on the capillary network, which can provide differential access to normal and tumor cells. The accumulation of nanomedicines in the microlymphatics depends upon retention time in the blood and extracellular compartments, as well as the type of capillary endothelium surrounding specific tissues. Finally, the toxicity or efficacy of intact nanomedicines is also dependent upon tissue type, i.e., non-endocrine or endocrine tissue, spleen, or lymphatics, as well as tumor type.

Igarashi, Eiki [NanoCarrier Co., Ltd., Chiba 277-0882 (Japan)], E-mail: igarashi@nanocarrier.co.jp

2008-05-15T23:59:59.000Z

178

A review of maximum power point tracking algorithms for wind energy systems  

Science Journals Connector (OSTI)

This paper reviews state of the art maximum power point tracking (MPPT) algorithms for wind energy systems. Due to the instantaneous changing nature of the wind, it is desirable to determine the one optimal generator speed that ensures maximum energy yield. Therefore, it is essential to include a controller that can track the maximum peak regardless of wind speed. The available MPPT algorithms can be classified as either with or without sensors, as well as according to the techniques used to locate the maximum peak. A comparison has been made between the performance of different MPPT algorithms on the basis of various speed responses and ability to achieve the maximum energy yield. Based on simulation results available in the literature, the optimal torque control (OTC) has been found to be the best MPPT method for wind energy systems due to its simplicity. On the other hand, the perturbation and observation (P&O) method is flexible and simple in implementation, but is less efficient and has difficulties determining the optimum step-size.

M.A. Abdullah; A.H.M. Yatim; C.W. Tan; R. Saidur

2012-01-01T23:59:59.000Z

179

Landscape Planning and Biogeochemistry: Estimating and Analyzing Carbon Sequestration Efficacy In Dryland Open Space.  

E-Print Network (OSTI)

??Despite public demand for climate change mitigation and natural open space conservancy, existing political and design efforts are only beginning to address the declining efficacy (more)

Huck, Erick Otto

2012-01-01T23:59:59.000Z

180

Resources Matter: The Role of Social Capital and Collective Efficacy in Mediating Gun Violence.  

E-Print Network (OSTI)

??Abstract This study explains how community activists make use of available social capital and collective efficacy while attempting to mediate gun violence. It specifically focuses (more)

Dean, Jennifer Lynne

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Mathematics Self-Efficacy of Community College Students in Developmental Mathematics Courses.  

E-Print Network (OSTI)

??Mathematics self-efficacy was defined as an individual's beliefs about how he or she would perform a specific math task or in a specific mathematics or (more)

Clutts, David Walker

2010-01-01T23:59:59.000Z

182

E-Print Network 3.0 - affected saflufenacil efficacy Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

(group efficacy), pi is the marginal influence of the individual's ... Source: Lubell, Mark - Department of Environmental Science and Policy, University of California,...

183

E-Print Network 3.0 - adjust efficacy estimates Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

expected value of collective action increases as perceived personal efficacy Source: Lubell, Mark - Department of Environmental Science and Policy, University of California,...

184

E-Print Network 3.0 - assessor-blind comparative efficacy Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

expected value of collective action increases as perceived personal efficacy Source: Lubell, Mark - Department of Environmental Science and Policy, University of California,...

185

ULTRALUMINOUS STAR-FORMING GALAXIES AND EXTREMELY LUMINOUS WARM MOLECULAR HYDROGEN EMISSION AT z = 2.16 IN THE PKS 1138-26 RADIO GALAXY PROTOCLUSTER  

SciTech Connect

A deep Spitzer Infrared Spectrograph map of the PKS 1138-26 galaxy protocluster reveals ultraluminous polycyclic aromatic hydrocarbon (PAH) emission from obscured star formation in three protocluster galaxies, including H{alpha}-emitter (HAE) 229, HAE 131, and the central Spiderweb Galaxy. Star formation rates of {approx}500-1100 M{sub Sun} yr{sup -1} are estimated from the 7.7 {mu}m PAH feature. At such prodigious formation rates, the galaxy stellar masses will double in 0.6-1.1 Gyr. We are viewing the peak epoch of star formation for these protocluster galaxies. However, it appears that extinction of H{alpha} is much greater (up to a factor of 40) in the two ULIRG HAEs compared to the Spiderweb. This may be attributed to different spatial distributions of star formation-nuclear star formation in the HAEs versus extended star formation in accreting satellite galaxies in the Spiderweb. We find extremely luminous mid-IR rotational line emission from warm molecular hydrogen in the Spiderweb Galaxy, with L(H{sub 2} 0-0 S(3)) = 1.4 Multiplication-Sign 10{sup 44} erg s{sup -1} (3.7 Multiplication-Sign 10{sup 10} L{sub Sun }), {approx}20 times more luminous than any previously known H{sub 2} emission galaxy (MOHEG). Depending on the temperature, this corresponds to a very large mass of >9 Multiplication-Sign 10{sup 6}-2 Multiplication-Sign 10{sup 9} M{sub Sun} of T > 300 K molecular gas, which may be heated by the PKS 1138-26 radio jet, acting to quench nuclear star formation. There is >8 times more warm H{sub 2} at these temperatures in the Spiderweb than what has been seen in low-redshift (z < 0.2) radio galaxies, indicating that the Spiderweb may have a larger reservoir of molecular gas than more evolved radio galaxies. This is the highest redshift galaxy yet in which warm molecular hydrogen has been directly detected.

Ogle, P.; Davies, J. E.; Helou, G. [IPAC, California Institute of Technology, Mail Code 220-6, Pasadena, CA 91125 (United States); Appleton, P. N. [NHSC, California Institute of Technology, Mail Code 220-6, Pasadena, CA 91125 (United States); Bertincourt, B. [Department of Astronomy, Columbia University, 550 West 120th Street, New York, New York 10027 (United States); Seymour, N., E-mail: ogle@ipac.caltech.edu [CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710 (Australia)

2012-05-20T23:59:59.000Z

186

Estimating the maximum potential revenue for grid connected electricity storage : arbitrage and regulation.  

SciTech Connect

The valuation of an electricity storage device is based on the expected future cash ow generated by the device. Two potential sources of income for an electricity storage system are energy arbitrage and participation in the frequency regulation market. Energy arbitrage refers to purchasing (stor- ing) energy when electricity prices are low, and selling (discharging) energy when electricity prices are high. Frequency regulation is an ancillary service geared towards maintaining system frequency, and is typically procured by the independent system operator in some type of market. This paper outlines the calculations required to estimate the maximum potential revenue from participating in these two activities. First, a mathematical model is presented for the state of charge as a function of the storage device parameters and the quantities of electricity purchased/sold as well as the quantities o ered into the regulation market. Using this mathematical model, we present a linear programming optimization approach to calculating the maximum potential revenue from an elec- tricity storage device. The calculation of the maximum potential revenue is critical in developing an upper bound on the value of storage, as a benchmark for evaluating potential trading strate- gies, and a tool for capital nance risk assessment. Then, we use historical California Independent System Operator (CAISO) data from 2010-2011 to evaluate the maximum potential revenue from the Tehachapi wind energy storage project, an American Recovery and Reinvestment Act of 2009 (ARRA) energy storage demonstration project. We investigate the maximum potential revenue from two di erent scenarios: arbitrage only and arbitrage combined with the regulation market. Our analysis shows that participation in the regulation market produces four times the revenue compared to arbitrage in the CAISO market using 2010 and 2011 data. Then we evaluate several trading strategies to illustrate how they compare to the maximum potential revenue benchmark. We conclude with a sensitivity analysis with respect to key parameters.

Byrne, Raymond Harry; Silva Monroy, Cesar Augusto.

2012-12-01T23:59:59.000Z

187

Carbonization of Coal Evaluation of Effects of Rate of Heating and of Maximum Temperature on Pyrolysis of a Coking Coal  

Science Journals Connector (OSTI)

Carbonization of Coal Evaluation of Effects of Rate of Heating and of Maximum Temperature on Pyrolysis of a Coking Coal ...

William B. Warren

1935-01-01T23:59:59.000Z

188

On the Vertical Decay Rate of the Maximum Tangential Winds in Tropical Cyclones DANIEL P. STERN* AND DAVID S. NOLAN  

E-Print Network (OSTI)

On the Vertical Decay Rate of the Maximum Tangential Winds in Tropical Cyclones DANIEL P. STERN independent of both the maximum wind speed and the radius of maximum winds (RMW). This can be seen winds change with height. Above 2-km height, vertical profiles of Vmaxnorm are nearly independent

Nolan, David S.

189

The Nature of Nearby Counterparts to Intermediate Redshift Luminous Compact Blue Galaxies I. Optical/H I Properties and Dynamical Masses  

E-Print Network (OSTI)

We present single-dish H I spectra obtained with the Green Bank Telescope, along with optical photometric properties from the Sloan Digital Sky Survey, of 20 nearby (D < 70 Mpc) Luminous Compact Blue Galaxies (LCBGs). These ~L*, blue, high surface brightness, starbursting galaxies were selected with the same criteria used to define LCBGs at higher redshifts. We find these galaxies are gas-rich, with M(HI) ranging from 5*10^8 to 8*10^9 M_sun, and M(HI)/L_B ranging from 0.2 to 2 M_sun/L_sun, consistent with a variety of morphological types of galaxies. We find the dynamical masses (measured within R_25) span a wide range, from 3*10^9 to 1*10^11 M_sun. However, at least half have dynamical mass-to-light ratios smaller than nearby galaxies of all Hubble types, as found for LCBGs at intermediate redshifts. By comparing line widths and effective radii with local galaxy populations, we find that LCBGs are consistent with the dynamical mass properties of Magellanic (low luminosity) spirals, and the more massive irregulars and dwarf ellipticals, such as NGC 205.

C. A. Garland; D. J. Pisano; J. P. Williams; R. Guzman; F. J. Castander

2004-07-20T23:59:59.000Z

190

ALMA DETECTION OF THE VIBRATIONALLY EXCITED HCN J = 4-3 EMISSION LINE IN THE AGN-HOSTING LUMINOUS INFRARED GALAXY IRAS 205514250  

SciTech Connect

We present results from our ALMA Cycle 0 observations, at the frequencies around the HCN, HCO{sup +}, and HNC J = 4-3 transition lines, of the luminous infrared galaxy IRAS 205514250 at z = 0.043, which is known to host an energetically important obscured active galactic nucleus (AGN). In addition to the targeted HCN, HCO{sup +}, and HNC J = 4-3 emission lines, two additional strong emission lines are seen, which we attribute to H{sub 2}S and CH{sub 3}CN(+CCH). The HCN-to-HCO{sup +} J = 4-3 flux ratio (?0.7) is higher than in the other starburst-dominated galaxy (?0.2) observed in our ALMA Cycle 0 program. We tentatively (?5?) detected the vibrationally excited (v {sub 2} = 1) HCN J = 4-3 (l = 1f) emission line, which is important for testing an infrared radiative pumping scenario for HCN. This is the second detection of this molecular transition in external galaxies. The most likely reason for this detection is not only the high flux of this emission line, but also the small molecular line widths observed in this galaxy, suggesting that vibrational excitation of HCN may be relatively common in AGN-hosting galaxies.

Imanishi, Masatoshi [Subaru Telescope, 650 North A'ohoku Place, Hilo, Hawaii, 96720 (United States); Nakanishi, Kouichiro, E-mail: masa.imanishi@nao.ac.jp [Joint ALMA Observatory, Alonso de Crdova 3107, Vitacura 763-0355, Santiago de Chile (Chile)

2013-10-01T23:59:59.000Z

191

Maximum-entropy meshfree method for nonlinear static analysis of planar reinforced concrete structures  

E-Print Network (OSTI)

the nonlinear system of equations. Maximum-entropy basis functions are used to discretize the two displacement control method is implemented to solve the nonlinear system of equations and to obtain tools in the field of structural engineering, Yaw and co-workers [1] presented a blended FE and meshfree

Sukumar, N.

192

Magnetofossil spike during the Paleocene-Eocene thermal maximum: Ferromagnetic resonance, rock magnetic, and electron microscopy  

E-Print Network (OSTI)

Magnetofossil spike during the Paleocene-Eocene thermal maximum: Ferromagnetic resonance, rock,2 Timothy D. Raub,3,4 Dirk Schumann,5 Hojatollah Vali,5 Alexei V. Smirnov,3,6 and Joseph L. Kirschvink1 controversial hypothesis that a cometary impact triggered the PETM. Here we present ferromagnetic resonance (FMR

193

Maximum late Holocene extent of the western Greenland Ice Sheet during the late 20th century  

E-Print Network (OSTI)

the 20th century. This suggests a lagged ice-margin response to prior cooling, such as the Little Ice AgeMaximum late Holocene extent of the western Greenland Ice Sheet during the late 20th century Samuel Keywords: Greenland Ice Sheet Little Ice Age 10 Be exposure dating Ice-dammed lake Lake sediment core a b

Briner, Jason P.

194

Sufficient Stochastic Maximum Principle in a Regime-Switching Diffusion Model  

SciTech Connect

We prove a sufficient stochastic maximum principle for the optimal control of a regime-switching diffusion model. We show the connection to dynamic programming and we apply the result to a quadratic loss minimization problem, which can be used to solve a mean-variance portfolio selection problem.

Donnelly, Catherine, E-mail: C.Donnelly@hw.ac.uk [Heriot-Watt University, Department of Actuarial Mathematics and Statistics (United Kingdom)

2011-10-15T23:59:59.000Z

195

SAWSA-LPR: Astochastic search strategy for estimation of maximum likelihood DNA phylogenetic trees  

Science Journals Connector (OSTI)

In the spirit of the ''grand challenge'', this paper covers the development of novel concepts for inference of large phylogenies based on the maximum likelihood method, which has proved to be the most accurate model for inference of huge and complex ... Keywords: DNA, Inferencing, LPR, Phylogenetic tree, Simulated annealing

Sanchita Paul, Gadadhar Sahoo

2014-05-01T23:59:59.000Z

196

On the maximum and minimum mass of protoneutron stars in the Brueckner theory  

E-Print Network (OSTI)

We study the structure of protoneutron stars within the finite-temperature Brueckner-Bethe-Goldstone theoretical approach, paying particular attention to the joining with a low-density nuclear equation of state (EOS). We find a slight sensitivity of the minimum value of the protoneutron star mass on the low-density EOS, whereas the maximum mass is hardly affected.

Burgio, G F

2010-01-01T23:59:59.000Z

197

Maximum Feedrate Interpolator for Multi-axis CNC Machining with Jerk Constraints  

E-Print Network (OSTI)

Maximum Feedrate Interpolator for Multi-axis CNC Machining with Jerk Constraints X. Beudaert, S name@lurpa.ens-cachan.fr Abstract A key role of the CNC is to perform the feedrate interpolation which for the next point along the path is computed. Examples and comparisons with an industrial CNC demonstrate

Paris-Sud XI, Université de

198

Ocean Circulation During the Last Glacial Maximum Simulated by PMIP3 Climate Models  

E-Print Network (OSTI)

in the intensity of the Atlantic Overturning Circulation (distinguished by the local maximum at approximately 30 N %. In the plot corresponding to the World Ocean Circulation, an increase in the Deep Circulation, associated of the water masses as well as the impact on ocean carbon storage. References: [1] Godfrey J. S., Geophysics

Schmittner, Andreas

199

Environmental and Ecological Statistics 10, 455467, 2003 Moment and maximum likelihood  

E-Print Network (OSTI)

Environmental and Ecological Statistics 10, 455±467, 2003 Moment and maximum likelihood estimators are probability proportional to size methods. These methods are also referred to as size-biased because sampling are special cases of size-biased sampling where the probability weighting comes from a lineal or areal

200

Towards a frequency-dependent discrete maximum principle for the implicit Monte Carlo equations  

SciTech Connect

It has long been known that temperature solutions of the Implicit Monte Carlo (IMC) equations can exceed the external boundary temperatures, a so-called violation of the 'maximum principle.' Previous attempts at prescribing a maximum value of the time-step size {Delta}{sub t} that is sufficient to eliminate these violations have recommended a {Delta}{sub t} that is typically too small to be used in practice and that appeared to be much too conservative when compared to numerical solutions of the IMC equations for practical problems. In this paper, we derive a new estimator for the maximum time-step size that includes the spatial-grid size {Delta}{sub x}. This explicitly demonstrates that the effect of coarsening {Delta}{sub x} is to reduce the limitation on {Delta}{sub t}, which helps explain the overly conservative nature of the earlier, grid-independent results. We demonstrate that our new time-step restriction is a much more accurate means of predicting violations of the maximum principle. We discuss how the implications of the new, grid-dependent timestep restriction can impact IMC solution algorithms.

Wollaber, Allan B [Los Alamos National Laboratory; Larsen, Edward W [Los Alamos National Laboratory; Densmore, Jeffery D [Los Alamos National Laboratory

2010-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Maximum Class Separability for Rough-Fuzzy C-Means Based Brain MR Image Segmentation  

E-Print Network (OSTI)

Maximum Class Separability for Rough-Fuzzy C-Means Based Brain MR Image Segmentation Pradipta Maji of brain MR images. The RFCM algorithm comprises a judicious integration of the of rough sets, fuzzy sets with vagueness and incompleteness in class definition of brain MR images, the membership function of fuzzy sets

Pal, Sankar Kumar

202

Maximum Utility Product Pricing Models and Algorithms Based on Reservation Prices  

E-Print Network (OSTI)

Maximum Utility Product Pricing Models and Algorithms Based on Reservation Prices R. Shioda L. Tun for pricing a product line with several customer segments under the assumption that customers' product choices utility model and formulate it as a mixed-integer programming problem, design heuristics and valid cuts

Tunçel, Levent

203

Self-Assembly for Maximum Yields Under Constraints Michael J. Fox and Jeff S. Shamma  

E-Print Network (OSTI)

Self-Assembly for Maximum Yields Under Constraints Michael J. Fox and Jeff S. Shamma Abstract-- We present an algorithm that, given any target tree, synthesizes reversible self-assembly rules that provide states that cannot be recovered from the unlabeled graph. I. INTRODUCTION Self-assembly is the phenomenon

Shamma, Jeff S.

204

Optimization of stomatal conductance for maximum carbon gain under dynamic soil moisture  

E-Print Network (OSTI)

Optimization of stomatal conductance for maximum carbon gain under dynamic soil moisture Stefano Accepted 26 September 2013 Available online 9 October 2013 Keywords: Optimization Photosynthesis Soil moisture Stomatal conductance Transpiration a b s t r a c t Optimization theories explain a variety

Katul, Gabriel

205

Power and Sample Size Determination for a Stepwise Test Procedure for Finding the Maximum Safe Dose  

E-Print Network (OSTI)

Power and Sample Size Determination for a Stepwise Test Procedure for Finding the Maximum Safe Dose This paper addresses the problem of power and sample size calculation for a stepwise multiple test procedure of a compound. A general expression for the power of this procedure is derived. It is used to find the minimum

Tamhane, Ajit C.

206

Generalized Local Maximum Principles for Finite-Difference Operators Author(s): Achi Brandt  

E-Print Network (OSTI)

Generalized Local Maximum Principles for Finite-Difference Operators Author(s): Achi Brandt Source://www.jstor.org/action/showPublisher?publisherCode=ams. . Each copy of any part of a JSTOR transmission must contain the same copyright notice that appears on the screen or printed page of such transmission. JSTOR is a not-for-profit service that helps scholars

207

Design of wind farm layout for maximum wind energy capture Andrew Kusiak*, Zhe Song  

E-Print Network (OSTI)

Design of wind farm layout for maximum wind energy capture Andrew Kusiak*, Zhe Song Intelligent sources of alternative energy. The construction of wind farms is destined to grow in the U.S., possibly twenty-fold by the year 2030. To maximize the wind energy capture, this paper presents a model for wind

Kusiak, Andrew

208

Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated Tropical Cyclone  

E-Print Network (OSTI)

0 Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated) viewed as a heat engine converts heat energy extracted from the ocean to kinetic energy of the TC, which is eventually dissipated due to surface friction. Since the energy production rate is a linear function while

Wang, Yuqing

209

Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated Tropical Cyclone*  

E-Print Network (OSTI)

Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated as a heat engine converts heat energy extracted from the ocean into the kinetic energy of the TC, which is eventually dissipated due to surface friction. Since the energy production rate is a linear function while

Wang, Yuqing

210

THE SECOND LAW OF THERMODYNAMICS AND THE GLOBAL CLIMATE SYSTEM: A REVIEW OF THE MAXIMUM  

E-Print Network (OSTI)

THE SECOND LAW OF THERMODYNAMICS AND THE GLOBAL CLIMATE SYSTEM: A REVIEW OF THE MAXIMUM ENTROPY of the global climate system and those of turbulent fluid systems are reviewed from a thermodynamic viewpoint production, energetics Citation: Ozawa, H., A. Ohmura, R. D. Lorenz, and T. Pujol, The second law

Lorenz, Ralph D.

211

Integrating ecophysiology and plankton dynamics into projected changes in maximum fisheries catch potential under climate  

E-Print Network (OSTI)

). In addition, average surface water pH of the ocean has dropped by 0.1 units since pre- industrial timesIntegrating ecophysiology and plankton dynamics into projected changes in maximum fisheries catch 7TJ, UK 2 Centre for Environment, Fisheries and Aquaculture Science, Pakefield Road, Lowestoft

Pauly, Daniel

212

Accurate Single Molecule FRET Efficiency Determination for Surface Immobilized DNA Using Maximum Likelihood Calculated Lifetimes  

E-Print Network (OSTI)

Accurate Single Molecule FRET Efficiency Determination for Surface Immobilized DNA Using MaximumVed: October 4, 2006; In Final Form: January 12, 2007 Single molecule fluorescent lifetime trajectories directly measured using time-tagged single-photon counting and scanning confocal microscopy. A modified

213

A PROXIMITY CONTROL ALGORITHM TO MINIMIZE NONSMOOTH AND NONCONVEX SEMI-INFINITE MAXIMUM  

E-Print Network (OSTI)

in the context of eigen- value optimization, and [8] gives an overview of the history. The bases for the presentA PROXIMITY CONTROL ALGORITHM TO MINIMIZE NONSMOOTH AND NONCONVEX SEMI-INFINITE MAXIMUM EIGENVALUE function, semi-infinite problem, H-norm. 1. Introduction. Proximity control for bundle methods has been

Noll, Dominikus

214

A PROXIMITY CONTROL ALGORITHM TO MINIMIZE NONSMOOTH AND NONCONVEX SEMI-INFINITE MAXIMUM  

E-Print Network (OSTI)

in the context of eigen- value optimization, and [9] gives an overview of the history. The bases for the presentA PROXIMITY CONTROL ALGORITHM TO MINIMIZE NONSMOOTH AND NONCONVEX SEMI-INFINITE MAXIMUM EIGENVALUE function, semi-infinite problem, H-norm. 1. Introduction. Proximity control for bundle methods has been

Noll, Dominikus

215

Abstract 4241: Preclinical studies of brain/brain tumor disposition and antitumor efficacy of the aromatase inhibitor letrozole  

Science Journals Connector (OSTI)

...San Diego, CA Abstract 4241: Preclinical studies of brain/brain tumor disposition and antitumor efficacy of the aromatase...target for the treatment of CNS malignancies, as well as brain disposition and anti-tumor efficacy of letrozole, an...

Nimita Dave; Pankaj B. Desai; Gary A. Gudelsky; Kathleen LaSance; Lionel M.L. Chow; Xiaoyang Qi

2014-10-01T23:59:59.000Z

216

An Ad-Hoc Method for Obtaining chi**2 Values from Unbinned Maximum Likelihood Fits  

E-Print Network (OSTI)

A common goal in an experimental physics analysis is to extract information from a reaction with multi-dimensional kinematics. The preferred method for such a task is typically the unbinned maximum likelihood method. In fits using this method, the likelihood is a goodness-of-fit quantity in that it effectively discriminates between available hypotheses; however, it does not provide any information as to how well the best hypothesis describes the data. In this paper, we present an {\\em ad-hoc} procedure for obtaining chi**2/n.d.f. values from unbinned maximum likelihood fits. This method does not require binning the data, making it very applicable to multi-dimensional problems.

M. Williams; C. A. Meyer

2008-06-30T23:59:59.000Z

217

A comparison of maximum likelihood and other estimators of eigenvalues from several correlated Monte Carlo samples  

SciTech Connect

The maximum likelihood method for the multivariate normal distribution is applied to the case of several individual eigenvalues. Correlated Monte Carlo estimates of the eigenvalue are assumed to follow this prescription and aspects of the assumption are examined. Monte Carlo cell calculations using the SAM-CE and VIM codes for the TRX-1 and TRX-2 benchmark reactors, and SAM-CE full core results are analyzed with this method. Variance reductions of a few percent to a factor of 2 are obtained from maximum likelihood estimation as compared with the simple average and the minimum variance individual eigenvalue. The numerical results verify that the use of sample variances and correlation coefficients in place of the corresponding population statistics still leads to nearly minimum variance estimation for a sufficient number of histories and aggregates.

Beer, M.

1980-12-01T23:59:59.000Z

218

Maximum-Entropy Meshfree Method for Compressible and Near-Incompressible Elasticity  

SciTech Connect

Numerical integration errors and volumetric locking in the near-incompressible limit are two outstanding issues in Galerkin-based meshfree computations. In this paper, we present a modified Gaussian integration scheme on background cells for meshfree methods that alleviates errors in numerical integration and ensures patch test satisfaction to machine precision. Secondly, a locking-free small-strain elasticity formulation for meshfree methods is proposed, which draws on developments in assumed strain methods and nodal integration techniques. In this study, maximum-entropy basis functions are used; however, the generality of our approach permits the use of any meshfree approximation. Various benchmark problems in two-dimensional compressible and near-incompressible small strain elasticity are presented to demonstrate the accuracy and optimal convergence in the energy norm of the maximum-entropy meshfree formulation.

Ortiz, A; Puso, M A; Sukumar, N

2009-09-04T23:59:59.000Z

219

A maximum entropy theorem with applications to the measurement of biodiversity  

E-Print Network (OSTI)

This is a preliminary article stating and proving a new maximum entropy theorem. The entropies that we consider can be used as measures of biodiversity. In that context, the question is: for a given collection of species, which frequency distribution(s) maximize the diversity? The theorem provides the answer. The chief surprise is that although we are dealing not just with a single entropy, but a one-parameter family of entropies, there is a single distribution maximizing all of them simultaneously.

Leinster, Tom

2009-01-01T23:59:59.000Z

220

Computation of the maximum loadability of a power system using nonlinear optimization  

E-Print Network (OSTI)

Between Generator and Load. . . . . . . . . 34 E. Flowchart for Optimization Program F. Tutorial Example G. Conclusion. . 35 36 44 V SIMULATION RESULTS. 45 A. Introduction. B. Results of Simulation for Maximum Loadability of the Total System. I... of this work starting from the basics. Chapter III will cover concepts of power flow and loadability along with tutorial example. The literature survey over this topic and previous work as well as problem statement and solution method will be covered...

Khabirov, Abdufarrukh

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Interval analysis applied to the maximum loading point of electric power systems considering load data uncertainties  

Science Journals Connector (OSTI)

Abstract This paper proposes a simple and efficient power flow method to calculate, in an interval manner, the main variables corresponding to the maximum loading point, under load data uncertainties. The resulting interval nonlinear system of equations is solved using Krawczyk method. The proposed methodology is implemented in the Matlab environment using the Intlab toolbox. Results are compared with those obtainable by Monte Carlo simulations. IEEE 30 bus system and a South-southeastern Brazilian network are used to validate the proposed methodology.

L.E.S. Pereira; V.M. da Costa

2014-01-01T23:59:59.000Z

222

Hydrodynamic equations for electrons in graphene obtained from the maximum entropy principle  

SciTech Connect

The maximum entropy principle is applied to the formal derivation of isothermal, Euler-like equations for semiclassical fermions (electrons and holes) in graphene. After proving general mathematical properties of the equations so obtained, their asymptotic form corresponding to significant physical regimes is investigated. In particular, the diffusive regime, the Maxwell-Boltzmann regime (high temperature), the collimation regime and the degenerate gas limit (vanishing temperature) are considered.

Barletti, Luigi, E-mail: luigi.barletti@unifi.it [Dipartimento di Matematica e Informatica Ulisse Dini, Universit degli Studi di Firenze, Viale Morgagni 67/A, 50134 Firenze (Italy)

2014-08-15T23:59:59.000Z

223

An Analysis of Maximum Residential Energy Efficiency in Hot and Humid Climates  

E-Print Network (OSTI)

the high efficiency instantaneous water heater with electronic ignition. The largest equipment energy savings (20%) was achieved from the horizontal-axis clothes washer. Compact fluorescent lamps (CFLs) saved 75% lighting energy use. Among all...AN ANALYSIS OF MAXIMUM RESIDENTIAL ENERGY EFFICIENCY IN HOT AND HUMID CLIMATES Mini Malhotra Graduate Research Assistant Jeff Haberl, Ph.D., P.E. Professor/Associate Director Energy Systems Laboratory, Texas A&M University College...

Malhotra, M.; Haberl, J. S.

2006-01-01T23:59:59.000Z

224

U.S. Maximum Number of Active Crews Engaged in Seismic Surveying (Number of  

Gasoline and Diesel Fuel Update (EIA)

Maximum Number of Active Crews Engaged in Seismic Surveying (Number of Elements) Maximum Number of Active Crews Engaged in Seismic Surveying (Number of Elements) U.S. Maximum Number of Active Crews Engaged in Seismic Surveying (Number of Elements) Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2000 0 0 62 63 59 63 58 61 59 63 62 65 2001 61 61 63 65 64 60 58 56 54 58 59 58 2002 54 57 54 50 51 50 52 50 56 57 50 43 2003 40 41 41 40 38 39 41 43 39 39 38 42 2004 43 45 45 45 44 49 48 49 48 48 49 50 2005 52 53 51 50 55 57 54 55 56 57 57 58 2006 55 57 59 58 58 57 66 62 63 64 65 64 2007 63 63 68 71 70 69 69 71 73 77 79 75 2008 76 77 75 72 73 73 72 72 NA 77 72 73 2009 75 76 72 70 65 60 61 60 60 63 62 63 2010 64 65 63 66 67 67 67 65 64 62 62 62

225

Effect of altered boundary conditions on GCM studies of the climate of the last glacial maximum  

SciTech Connect

The authors address a problem discovered recently with global climate model results for the last glacial maximum. Bard, et. al. pointed out a mismatch in boundary conditions entered into the model. Ice sheet conditions were derived from CLIMAP based on a time 18000 radiocarbon years ago. It was assumed that radiocarbon and sidereal dates coincide. However it was recently shown that the sidereal data of the last glacial maximum is nearer 21kbp. The authors perform model calculations to attempt to evaluate the seriousness of this mismatch in terms of calculated results from the global climate model runs for the last glacial maximum. The authors find that one result of the timing mismatch is a sizable difference in northern hemisphere summer and Eurasian winter climates. These changes should have a major impact on circulation patterns in the GCM simulations. In addition new ice sheet model programs are available now which appear to improve on CLIMAP models. The authors urge that these GCM simulations be rerun.

Hyde, W.T.; Peltier, W.R.

1993-05-21T23:59:59.000Z

226

A proposed methodology for medium-range maximum demand anticipation and application  

Science Journals Connector (OSTI)

One to three years' anticipation of monthly and weekly peak demand is required to prepare maintenance schedules, develop power pooling agreements, select peaking capacity and provide data required by certain reliability coordinating centers. A total monthly forecast of the maximum demand is deduced and computed for the three years up to April 1981. This is accomplished for an important electrical network in Egypt. The anticipated maximum demand is executed for El-Mehalla El-Kubra city network. This network has an industrial and residential daily load characteristic. Direct monthly maximum demand forecasting is executed by separate treatment of weather-independent and weather-induced demand. The required forecast is derived by two methodologies: the probabilistic extrapolation-correlation, and that suggested by the authors. Daily and monthly data have been collected for more reliable determination of weather load models. Complete analysis, discussion and comments on the results are presented, and the results compared. This comparison reveals that an acceptable and reasonable percentage error is obtained on applying the proposed methodology.

M.S. Kandil; M.Helmy El-Maghraby; H. El-Dosouky

1981-01-01T23:59:59.000Z

227

LUMINOUS AND HIGH STELLAR MASS CANDIDATE GALAXIES AT z Almost-Equal-To 8 DISCOVERED IN THE COSMIC ASSEMBLY NEAR-INFRARED DEEP EXTRAGALACTIC LEGACY SURVEY  

SciTech Connect

One key goal of the Hubble Space Telescope Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey is to track galaxy evolution back to z Almost-Equal-To 8. Its two-tiered ''wide and deep'' strategy bridges significant gaps in existing near-infrared surveys. Here we report on z Almost-Equal-To 8 galaxy candidates selected as F105W-band dropouts in one of its deep fields, which covers 50.1 arcmin{sup 2} to 4 ks depth in each of three near-infrared bands in the Great Observatories Origins Deep Survey southern field. Two of our candidates have J < 26.2 mag, and are >1 mag brighter than any previously known F105W-dropouts. We derive constraints on the bright end of the rest-frame ultraviolet luminosity function of galaxies at z Almost-Equal-To 8, and show that the number density of such very bright objects is higher than expected from the previous Schechter luminosity function estimates at this redshift. Another two candidates are securely detected in Spitzer Infrared Array Camera images, which are the first such individual detections at z Almost-Equal-To 8. Their derived stellar masses are on the order of a few Multiplication-Sign 10{sup 9} M{sub Sun }, from which we obtain the first measurement of the high-mass end of the galaxy stellar mass function at z Almost-Equal-To 8. The high number density of very luminous and very massive galaxies at z Almost-Equal-To 8, if real, could imply a large stellar-to-halo mass ratio and an efficient conversion of baryons to stars at such an early time.

Yan Haojing [Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211 (United States); Finkelstein, Steven L. [Department of Astronomy, University of Texas at Austin, Austin, TX 78712 (United States); Huang, Kuang-Han [Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218 (United States); Ryan, Russell E.; Ferguson, Henry C.; Koekemoer, Anton M.; Grogin, Norman A. [Space Telescope Science Institute, Baltimore, MD 21218 (United States); Dickinson, Mark [National Optical Astronomy Observatory, Tucson, AZ 85719 (United States); Newman, Jeffrey A. [Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260 (United States); Somerville, Rachel S. [Physics and Astronomy Department, Rutgers University, Piscataway, NJ 08854 (United States); Dave, Romeel [Astronomy Department, University of Arizona, Tucson, AZ 85721 (United States); Faber, S. M. [University of California Observatories/Lick Observatory, University of California, Santa Cruz, CA 95064 (United States); Papovich, Casey [George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy, Texas A and M University, College Station, TX 77843-4242 (United States); Guo Yicheng; Giavalisco, Mauro [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States); Lee, Kyoung-soo [Department of Physics, Purdue University, West Lafayette, IN 47907 (United States); Reddy, Naveen; Siana, Brian D. [Department of Physics and Astronomy, University of California, Riverside, CA 92521 (United States); Cooray, Asantha R. [Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States); Hathi, Nimish P. [Observatories of the Carnegie Institution for Science, Pasadena, CA 91101 (United States); and others

2012-12-20T23:59:59.000Z

228

A maximum power tracking algorithm based on photovoltaic current control for matching loads to a photovoltaic generator  

Science Journals Connector (OSTI)

In this paper, a novel maximum power point tracking (MPPT) approach is studied. It is based on the photovoltaic (PV) current control. The last one...

Ben Hamed Mouna; Sbita Lassad

2012-10-01T23:59:59.000Z

229

An investigation of the effect of spacing of practice on the performance-efficacy relationship  

E-Print Network (OSTI)

The objective of the current study was to investigate the relationship between training performance and selfefficacy using a longitudinal design (approximately 11 weeks) in the context of massed and distributed practice. Limited attention...

Bhupatkar, Alok Ashutosh

2009-05-15T23:59:59.000Z

230

Structured communication: effects on teaching efficacy of student teachers and student teacher - cooperating teacher relationships  

E-Print Network (OSTI)

Teaching efficacy beliefs of agricultural science student teachers, and their relationship with their cooperating teachers during field experiences, are variables that may affect the number of student teachers entering the profession. The purpose...

Edgar, Don Wayne

2007-09-17T23:59:59.000Z

231

An Exploratory Study of Teacher Self-Efficacy Beliefs and Profssional Learning Community  

E-Print Network (OSTI)

The exploratory study sought to examine the relationships between teachers' self-efficacy beliefs and professional learning community. Specifically, this study presents a quantitative analysis of the relationship between teachers' perceptions...

Romeo, Susan M.

2010-12-15T23:59:59.000Z

232

Relation Among Efficacy of Insecticides, Resistance Levels, and Sanitation in the Control of the  

E-Print Network (OSTI)

correlation was confirmed between poor sanitation and higher cockroach populations. Improved sanitaryRelation Among Efficacy of Insecticides, Resistance Levels, and Sanitation in the Control test). KEY WORDS Insecta, Blattella germanica, sanitation, resistance CURRENT RECOMMENDAn

233

Map-making in small field modulated CMB polarisation experiments: approximating the maximum-likelihood method  

E-Print Network (OSTI)

Map-making presents a significant computational challenge to the next generation of kilopixel CMB polarisation experiments. Years worth of time ordered data (TOD) from thousands of detectors will need to be compressed into maps of the T, Q and U Stokes parameters. Fundamental to the science goal of these experiments, the observation of B-modes, is the ability to control noise and systematics. In this paper, we consider an alternative to the maximum-likelihood method, called destriping, where the noise is modelled as a set of discrete offset functions and then subtracted from the time-stream. We compare our destriping code (Descart: the DEStriping CARTographer) to a full maximum-likelihood map-maker, applying them to 200 Monte-Carlo simulations of time-ordered data from a ground based, partial-sky polarisation modulation experiment. In these simulations, the noise is dominated by either detector or atmospheric 1/f noise. Using prior information of the power spectrum of this noise, we produce destriped maps of T, Q and U which are negligibly different from optimal. The method does not filter the signal or bias the E or B-mode power spectra. Depending on the length of the destriping baseline, the method delivers between 5 and 22 times improvement in computation time over the maximum-likelihood algorithm. We find that, for the specific case of single detector maps, it is essential to destripe the atmospheric 1/f in order to detect B-modes, even though the Q and U signals are modulated by a half-wave plate spinning at 5-Hz.

D. Sutton; B. R. Johnson; M. L. Brown; P. Cabella; P. G. Ferreira; K. M. Smith

2008-07-23T23:59:59.000Z

234

A reliable, fast and low cost maximum power point tracker for photovoltaic applications  

SciTech Connect

This work presents a new maximum power point tracker system for photovoltaic applications. The developed system is an analog version of the ''P and O-oriented'' algorithm. It maintains its main advantages: simplicity, reliability and easy practical implementation, and avoids its main disadvantages: inaccurateness and relatively slow response. Additionally, the developed system can be implemented in a practical way at a low cost, which means an added value. The system also shows an excellent behavior for very fast variables in incident radiation levels. (author)

Enrique, J.M.; Andujar, J.M.; Bohorquez, M.A. [Departamento de Ingenieria Electronica, de Sistemas Informaticos y Automatica, Universidad de Huelva (Spain)

2010-01-15T23:59:59.000Z

235

Lensmem a gravitational lens inversion algorithm using the maximum entropy method  

E-Print Network (OSTI)

We present a new algorithm for inverting poorly resolved gravitational lens systems using the maximum entropy method (MEM). We test the method with simulations and then apply it to an 8 GHz VLA map of the radio ring lens MG1654+134. We model the lens as a singular isothermal sphere embedded in an external shear field and find the critical radius of the lens is b=0\\parcs9820, the dimensionless shear is \\gamma=0.0771, and the position angle of the shear is \\theta=100\\pdeg8. These results are consistent with the results obtained by Kochanek (1995) using a complementary inversion algorithm based on Clean.

Wallington, S; Narayan, R

1995-01-01T23:59:59.000Z

236

LensMEM: A Gravitational Lens Inversion Algorithm Using the Maximum Entropy Method  

E-Print Network (OSTI)

We present a new algorithm for inverting poorly resolved gravitational lens systems using the maximum entropy method (MEM). We test the method with simulations and then apply it to an 8 GHz VLA map of the radio ring lens MG1654+134. We model the lens as a singular isothermal sphere embedded in an external shear field and find the critical radius of the lens is $b=0\\parcs9820$, the dimensionless shear is $\\gamma=0.0771$, and the position angle of the shear is $\\theta=100\\pdeg8$. These results are consistent with the results obtained by Kochanek (1995) using a complementary inversion algorithm based on Clean.

S. Wallington; C. S. Kochanek; R. Narayan

1995-11-28T23:59:59.000Z

237

Interpretation of the depths of maximum of extensive air showers measured by the Pierre Auger Observatory  

SciTech Connect

To interpret the mean depth of cosmic ray air shower maximum and its dispersion, we parametrize those two observables as functions of the first two moments of the ln A distribution. We examine the goodness of this simple method through simulations of test mass distributions. The application of the parameterization to Pierre Auger Observatory data allows one to study the energy dependence of the mean ln A and of its variance under the assumption of selected hadronic interaction models. We discuss possible implications of these dependences in term of interaction models and astrophysical cosmic ray sources.

Collaboration: Pierre Auger Collaboration

2013-02-01T23:59:59.000Z

238

Detection-estimation of very close emitters: performance breakdown, ambiguity, and general statistical analysis of maximum-likelihood estimation  

Science Journals Connector (OSTI)

We reexamine the well-known problem of "threshold behavior" or "performance breakdown" in the detection-estimation of very closely spaced emitters. In this extreme regime, we analyze the performance for maximum-likelihood estimation (MLE) of directions-of-arrival ... Keywords: direction-of-arrival (DOA) estimation, maximum-likelihood estimation, random matrix theory, signal detection, signal resolution

Yuri I. Abramovich; Ben A. Johnson

2010-07-01T23:59:59.000Z

239

EXPLAINING THE [C II]157.7 {mu}m DEFICIT IN LUMINOUS INFRARED GALAXIES-FIRST RESULTS FROM A HERSCHEL/PACS STUDY OF THE GOALS SAMPLE  

SciTech Connect

We present the first results of a survey of the [C II]157.7 {mu}m emission line in 241 luminous infrared galaxies (LIRGs) comprising the Great Observatories All-sky LIRG Survey (GOALS) sample, obtained with the PACS instrument on board the Herschel Space Observatory. The [C II] luminosities, L{sub [C{sub II]}}, of the LIRGs in GOALS range from {approx}10{sup 7} to 2 Multiplication-Sign 10{sup 9} L{sub Sun }. We find that LIRGs show a tight correlation of [C II]/FIR with far-IR (FIR) flux density ratios, with a strong negative trend spanning from {approx}10{sup -2} to 10{sup -4}, as the average temperature of dust increases. We find correlations between the [C II]/FIR ratio and the strength of the 9.7 {mu}m silicate absorption feature as well as with the luminosity surface density of the mid-IR emitting region ({Sigma}{sub MIR}), suggesting that warmer, more compact starbursts have substantially smaller [C II]/FIR ratios. Pure star-forming LIRGs have a mean [C II]/FIR {approx} 4 Multiplication-Sign 10{sup -3}, while galaxies with low polycyclic aromatic hydrocarbon (PAH) equivalent widths (EWs), indicative of the presence of active galactic nuclei (AGNs), span the full range in [C II]/FIR. However, we show that even when only pure star-forming galaxies are considered, the [C II]/FIR ratio still drops by an order of magnitude, from 10{sup -2} to 10{sup -3}, with {Sigma}{sub MIR} and {Sigma}{sub IR}, implying that the [C II]157.7 {mu}m luminosity is not a good indicator of the star formation rate (SFR) for most local LIRGs, for it does not scale linearly with the warm dust emission most likely associated to the youngest stars. Moreover, even in LIRGs in which we detect an AGN in the mid-IR, the majority (2/3) of galaxies show [C II]/FIR {>=} 10{sup -3} typical of high 6.2 {mu}m PAH EW sources, suggesting that most AGNs do not contribute significantly to the FIR emission. We provide an empirical relation between the [C II]/FIR and the specific SFR for star-forming LIRGs. Finally, we present predictions for the starburst size based on the observed [C II] and FIR luminosities which should be useful for comparing with results from future surveys of high-redshift galaxies with ALMA and CCAT.

Diaz-Santos, T.; Armus, L.; Howell, J. H.; Surace, J. A. [Spitzer Science Center, California Institute of Technology, MS 220-6, Pasadena, CA 91125 (United States); Charmandaris, V. [IESL/Foundation for Research and Technology-Hellas, GR-71110, Heraklion (Greece); Stierwalt, S.; Evans, A. S.; Mazzarella, J. M. [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904 (United States); Murphy, E. J. [Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101 (United States); Haan, S. [CSIRO Astronomy and Space Science, Marsfield NSW 2122 (Australia); Inami, H. [National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Malhotra, S. [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 (United States); Meijerink, R. [Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, NL-9700 AV Groningen (Netherlands); Stacey, G. [Department of Astronomy, Cornell University, Ithaca, NY 14853 (United States); Petric, A. O.; Lu, N. [Astronomy Department, California Institute of Technology, Pasadena, CA 91125 (United States); Veilleux, S. [Joint Space-Science Institute, University of Maryland, College Park, MD 20742 (United States); Van der Werf, P. P. [Leiden Observatory, Leiden University, P.O. Box 9513, NL-2300 RA Leiden (Netherlands); Lord, S.; Appleton, P., E-mail: tanio@ipac.caltech.edu [NASA Herschel Science Center, IPAC, California Institute of Technology, MS 100-22, Cech, Pasadena, CA 91125 (United States); and others

2013-09-01T23:59:59.000Z

240

Property:Maximum Wave Height(m) at Wave Period(s) | Open Energy Information  

Open Energy Info (EERE)

Wave Height(m) at Wave Period(s) Wave Height(m) at Wave Period(s) Jump to: navigation, search Property Name Maximum Wave Height(m) at Wave Period(s) Property Type String Pages using the property "Maximum Wave Height(m) at Wave Period(s)" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + 10.0 + 10-ft Wave Flume Facility + 10.0 + 11-ft Wave Flume Facility + 10.0 + 2 2-ft Flume Facility + 10.0 + 3 3-ft Wave Flume Facility + 10.0 + 5 5-ft Wave Flume Facility + 10.0 + 6 6-ft Wave Flume Facility + 10.0 + A Alden Large Flume + 0.0 + Alden Wave Basin + 1.0 + C Chase Tow Tank + 3.1 + Coastal Harbors Modeling Facility + 2.3 + Coastal Inlet Model Facility + 2.3 + D Davidson Laboratory Tow Tank + 4.0 + DeFrees Large Wave Basin + 3.0 + DeFrees Small Wave Basin + 3.0 +

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Application of maximum likelihood methods to laser Thomson scattering measurements of low density plasmas  

SciTech Connect

Laser Thomson scattering (LTS) is an established plasma diagnostic technique that has seen recent application to low density plasmas. It is difficult to perform LTS measurements when the scattered signal is weak as a result of low electron number density, poor optical access to the plasma, or both. Photon counting methods are often implemented in order to perform measurements in these low signal conditions. However, photon counting measurements performed with photo-multiplier tubes are time consuming and multi-photon arrivals are incorrectly recorded. In order to overcome these shortcomings a new data analysis method based on maximum likelihood estimation was developed. The key feature of this new data processing method is the inclusion of non-arrival events in determining the scattered Thomson signal. Maximum likelihood estimation and its application to Thomson scattering at low signal levels is presented and application of the new processing method to LTS measurements performed in the plume of a 2-kW Hall-effect thruster is discussed.

Washeleski, Robert L.; Meyer, Edmond J. IV; King, Lyon B. [Michigan Technological University, Houghton, Michigan 49931 (United States)] [Michigan Technological University, Houghton, Michigan 49931 (United States)

2013-10-15T23:59:59.000Z

242

Maximum power point tracking of permanent magnet wind turbines equipped with direct matrix converter  

Science Journals Connector (OSTI)

This paper presents a novel control method for Maximum Power Point Tracking of wind turbines (WTs) equipped with a Permanent Magnet Synchronous Generator (PMSG) and a Direct Matrix Converter (DMC). The method calculates the optimum wind turbine speed and maximizes the extracted power from wind turbine. This is done by Hill Climb Search method which is simple and does not need to know the generator parameters and no need to solve the complicated differential equations of generator. WT rotor speed is compared with its optimal value and then DMC controls WT until its rotor speed reaches its optimum value. Under this situation maximum power is extracted from WT and is injected to the grid with unity power factor. It is implemented by controlling the phase and the amplitude of the DMC output voltage by Venturini switching method. Simulations are done on a 2?MW PMSG WT in MATLAB/SIMULINK to obtain the results the wind speed was varied both using the Van Der Hoven method and changing the wind step. The obtained results verify the accuracy and simplicity of proposed method.

2014-01-01T23:59:59.000Z

243

Dependency of U.S. Hurricane Economic Loss on Maximum Wind Speed and Storm Size  

E-Print Network (OSTI)

Many empirical hurricane economic loss models consider only wind speed and neglect storm size. These models may be inadequate in accurately predicting the losses of super-sized storms, such as Hurricane Sandy in 2012. In this study, we examined the dependencies of normalized U.S. hurricane loss on both wind speed and storm size for 73 tropical cyclones that made landfall in the U.S. from 1988 to 2012. A multi-variate least squares regression is used to construct a hurricane loss model using both wind speed and size as predictors. Using maximum wind speed and size together captures more variance of losses than using wind speed or size alone. It is found that normalized hurricane loss (L) approximately follows a power law relation with maximum wind speed (Vmax) and size (R). Assuming L=10^c Vmax^a R^b, c being a scaling factor, the coefficients, a and b, generally range between 4-12 and 2-4, respectively. Both a and b tend to increase with stronger wind speed. For large losses, a weighted regression model, with...

Zhai, Alice R

2014-01-01T23:59:59.000Z

244

Maximum wind energy contribution in autonomous electrical grids based on thermal power stations  

Science Journals Connector (OSTI)

Greek islands cover their continuously increasing electricity demand on the basis of small autonomous thermal power stations. This electrification solution is related with increased operational cost and power insufficiency, especially during summer. On the other hand, the stochastic behaviour of the wind and the important fluctuations of daily and seasonal electricity load in almost all Greek islands pose a substantial penetration limit for the exploitation of the high wind potential of the area. In this context, the present study is concentrated on developing an integrated methodology which can estimate the maximum wind energy contribution to the existing autonomous electrical grids, using the appropriate stochastic analysis. For this purpose one takes into account the electrical demand probability density profile of every island under investigation as well as the operational characteristics of the corresponding thermal power stations. Special attention is paid in order to protect the existing internal combustion engines from unsafe operation below their technical minima as well as to preserve the local system active power reserve and the corresponding dynamic stability. In order to increase the reliability of the results obtained, one may use extensive information for several years. Finally, the proposed study is integrated with an appropriate parametrical analysis, investigating the impact of the main parameters variation on the expected maximum wind energy contribution.

J.K. Kaldellis

2007-01-01T23:59:59.000Z

245

Impact of orthorectification and spatial sampling on maximum NDVI composite data in mountain regions  

Science Journals Connector (OSTI)

Topography and accuracy of image geometric registration significantly affect the quality of satellite data, since pixels are displaced depending on surface elevation and viewing geometry. This effect should be corrected for through the process of accurate image navigation and orthorectification in order to meet the geolocation accuracy for systematic observations specified by the Global Climate Observing System (GCOS) requirements for satellite climate data records. We investigated the impact of orthorectification on the accuracy of maximum Normalized Difference Vegetation Index (NDVI) composite data for a mountain region in north-western Canada at various spatial resolutions (1km, 4km, 5km, and 8km). Data from AVHRR on board NOAA-11 (1989 and 1990) and NOAA-16 (2001, 2002, and 2003) processed using a system called CAPS (Canadian AVHRR Processing System) for the month of August were considered. Results demonstrate the significant impact of orthorectification on the quality of composite NDVI data in mountainous terrain. Differences between orthorectified and non-orthorectified NDVI composites (?NDVI) adopted both large positive and negative values, with the 1% and 99% percentiles of ?NDVI at 1km resolution spanning values between ?0.16maximum NDVI composites at 1km resolution, large differences between orthorectified and non-orthorectified AVHRR data were identified at spatial scales between 4km and 10km. Validation of NOAA-16 AVHRR NDVI with MODIS NDVI composites revealed higher correlation coefficients (by up to 0.1) for orthorectified composites relative to the non-orthorectified case. Uncertainties due to the AVHRR Global Area Coverage (GAC) sampling scheme introduce an average positive bias of 0.020.03 at maximum NDVI composite level that translates into an average relative bias of 10.6%19.1 for sparsely vegetated mountain regions. This can at least partially explain the systematic average positive biases we observed relative to our results in AVHRR GAC-based composites from the Global Inventory Modeling and Mapping Studies (GIMMS) and Polar Pathfinder (PPF) datasets (0.19 and 0.05, respectively). With regard to the generation of AVHRR long-term climate data records, results suggest that orthorectification should be an integral part of AVHRR pre-processing, since neglecting the terrain displacement effect may lead to important biases and additional noise in time series at various spatial scales.

Fabio M.A. Fontana; Alexander P. Trishchenko; Konstantin V. Khlopenkov; Yi Luo; Stefan Wunderle

2009-01-01T23:59:59.000Z

246

Confining sets and avoiding bottleneck cases: A simple maximum independent set algorithm in degree-3 graphs  

Science Journals Connector (OSTI)

We present an O ? ( 1.083 6 n ) -time algorithm for finding a maximum independent set in an n -vertex graph with degree bounded by 3, which improves all previous running time bounds for this problem. Our approach has the following two features. Without increasing the number of reduction/branching rules to get an improved time bound, we first successfully extract the essence from the previously known reduction rules such as domination, which can be used to get simple algorithms. More formally, we introduce a procedure for computing confining sets, which unifies several known reducible subgraphs and covers new reducible subgraphs. Second we identify those instances that generate the worst recurrence among all recurrences of our branching rules as bottleneck instances and prove that bottleneck instances cannot appear consecutively after each branching operation.

Mingyu Xiao; Hiroshi Nagamochi

2013-01-01T23:59:59.000Z

247

Coulomb explosion effect and the maximum energy of protons accelerated by high-power lasers  

Science Journals Connector (OSTI)

The acceleration of light ions (protons) through the interaction of a high-power laser pulse with a double-layer target is theoretically studied by means of two-dimensional particle-in-cell simulations and a one-dimensional analytical model. It is shown that the maximum energy acquired by the accelerated light ions (protons) depends on the physical characteristics of a heavy-ion layer (electron-ion mass ratio and effective charge state of the ions). In our theoretical model, the hydrodynamic equations for both electron and heavy-ion species are solved and the test-particle approximation for the light ions (protons) is applied. The heavy-ion motion is found to modify the longitudinal electric field distribution, thus changing the acceleration conditions for the protons.

E. Fourkal; I. Velchev; C.-M. Ma

2005-03-25T23:59:59.000Z

248

Online Robot Dead Reckoning Localization Using Maximum Relative Entropy Optimization With Model Constraints  

SciTech Connect

The principle of Maximum relative Entropy optimization was analyzed for dead reckoning localization of a rigid body when observation data of two attached accelerometers was collected. Model constraints were derived from the relationships between the sensors. The experiment's results confirmed that accelerometers each axis' noise can be successfully filtered utilizing dependency between channels and the dependency between time series data. Dependency between channels was used for a priori calculation, and a posteriori distribution was derived utilizing dependency between time series data. There was revisited data of autocalibration experiment by removing the initial assumption that instantaneous rotation axis of a rigid body was known. Performance results confirmed that such an approach could be used for online dead reckoning localization.

Urniezius, Renaldas [Kaunas University of Technology, Kaunas (Lithuania)

2011-03-14T23:59:59.000Z

249

Maximum likelihood method to correct for missed levels based on the ?3(L) statistic  

Science Journals Connector (OSTI)

The ?3(L) statistic of random matrix theory is defined as the average of a set of random numbers {?}, derived from a spectrum. The distribution p(?) of these random numbers is used as the basis of a maximum likelihood method to gauge the fraction x of levels missed in an experimental spectrum. The method is tested on an ensemble of depleted spectra from the Gaussian orthogonal ensemble (GOE) and accurately returned the correct fraction of missed levels. Neutron resonance data and acoustic spectra of an aluminum block were analyzed. All results were compared with an analysis based on an established expression for ?3(L) for a depleted GOE spectrum. The effects of intruder levels are examined and seen to be very similar to those of missed levels. Shell model spectra were seen to give the same p(?) as the GOE.

Declan Mulhall

2011-05-26T23:59:59.000Z

250

Netest: A Tool to Measure the Maximum Burst Size, Available Bandwidth and Achievable Throughput  

SciTech Connect

Distinguishing available bandwidth and achievable throughput is essential for improving network applications' performance. Achievable throughput is the throughput considering a number of factors such as network protocol, host speed, network path, and TCP buffer space, where as available bandwidth only considers the network path. Without understanding this difference, trying to improve network applications' performance is like ''blind men feeling the elephant'' [4]. In this paper, we define and distinguish bandwidth and throughput, and debate which part of each is achievable and which is available. Also, we introduce and discuss a new concept - Maximum Burst Size that is crucial to the network performance and bandwidth sharing. A tool, netest, is introduced to help users to determine the available bandwidth, and provides information to achieve better throughput with fairness of sharing the available bandwidth, thus reducing misuse of the network.

Jin, Guojun; Tierney, Brian

2003-01-31T23:59:59.000Z

251

Comparative analysis of structural transformations of two bituminous coals with different maximum fluidity during carbonization  

SciTech Connect

The variation of the volume of two bituminous coals with different maximum fluidity (MF) values has been determined using carbonization tests, and the quality of coke obtained has been examined using scanning electron microscopy (SEM) micrographs. The structural and chemical changes in bituminous coals at the pre-plastic stage during carbonization were studied using X-ray diffraction (XRD) and Fourier transform infrared (FTIR) techniques and compared to the changes in their electric and dielectric parameters. It was observed that the structural and chemical transformations occurred in the disordered phase of both coals in different ways. These differences are attributed to the different redistributions of hydrogen between the radicals generated in the aliphatic and aromatic parts of the macromolecule fragments. 42 refs., 12 figs., 2 tabs.

Valentina Zubkova; Victor Prezhdo; Andrzej Strojwas [Jan Kochanowski University, Kielce (Poland). Institute of Chemistry

2007-06-15T23:59:59.000Z

252

Maximum Achievable Control Technology for New Industrial Boilers (released in AEO2005)  

Reports and Publications (EIA)

As part of Clean Air Act 90 (CAAA90, the EPA on February 26, 2004, issued a final rulethe National Emission Standards for Hazardous Air Pollutants (NESHAP) to reduce emissions of hazardous air pollutants (HAPs) from industrial, commercial, and institutional boilers and process heaters. The rule requires industrial boilers and process heaters to meet limits on HAP emissions to comply with a Maximum Achievable Control Technology (MACT) floor level of control that is the minimum level such sources must meet to comply with the rule. The major HAPs to be reduced are hydrochloric acid, hydrofluoric acid, arsenic, beryllium, cadmium, and nickel. The EPA predicts that the boiler MACT rule will reduce those HAP emissions from existing sources by about 59,000 tons per year in 2005.

2005-01-01T23:59:59.000Z

253

Is the friction angle the maximum slope of a free surface of a non cohesive material?  

E-Print Network (OSTI)

Starting from a symmetric triangular pile with a horizontal basis and rotating the basis in the vertical plane, we have determined the evolution of the stress distribution as a function of the basis inclination using Finite Elements method with an elastic-perfectly plastic constitutive model, defined by its friction angle, without cohesion. It is found that when the yield function is the Drucker-Prager one, stress distribution satisfying equilibrium can be found even when one of the free-surface slopes is larger than the friction angle. This means that piles with a slope larger than the friction angle can be (at least) marginally stable and that slope rotation is not always a destabilising perturbation direction. On the contrary, it is found that the slope cannot overpass the friction angle when a Mohr-Coulomb yield function is used. Theoretical explanation of these facts is given which enlightens the role plaid by the intermediate principal stress in both cases of the Mohr-Coulomb criterion and of the Drucker-Prager one. It is then argued that the Mohr-Coulomb criterion assumes a spontaneous symmetry breaking, as soon as the two smallest principal stresses are different ; this is not physical most likely; so this criterion shall be replaced by a Drucker-Prager criterion in the vicinity of the equality, which leads to the previous anomalous behaviour ; so these numerical computations enlighten the avalanche process: they show that no dynamical angle larger than the static one is needed to understand avalanching. It is in agreement with previous experimental results. Furthermore, these results show that the maximum angle of repose can be modified using cyclic rotations; we propose a procedure that allows to achieve a maximum angle of repose to be equal to the friction angle .

A. Modaressi; P. Evesque

2005-07-13T23:59:59.000Z

254

MID-INFRARED ATOMIC FINE-STRUCTURE EMISSION-LINE SPECTRA OF LUMINOUS INFRARED GALAXIES: SPITZER/IRS SPECTRA OF THE GOALS SAMPLE  

SciTech Connect

We present the data and our analysis of mid-infrared atomic fine-structure emission lines detected in Spitzer/Infrared Spectrograph high-resolution spectra of 202 local Luminous Infrared Galaxies (LIRGs) observed as part of the Great Observatories All-sky LIRG Survey (GOALS). We readily detect emission lines of [S IV], [Ne II], [Ne V], [Ne III], [S III]{sub 18.7{sub ?m}}, [O IV], [Fe II], [S III]{sub 33.5{sub ?m}}, and [Si II]. More than 75% of these galaxies are classified as starburst-dominated sources in the mid-infrared, based on the [Ne V]/[Ne II] line flux ratios and equivalent width of the 6.2 ?m polycyclic aromatic hydrocarbon feature. We compare ratios of the emission-line fluxes to those predicted from stellar photo-ionization and shock-ionization models to constrain the physical and chemical properties of the gas in the starburst LIRG nuclei. Comparing the [S IV]/[Ne II] and [Ne III]/[Ne II] line ratios to the Starburst99-Mappings III models with an instantaneous burst history, the emission-line ratios suggest that the nuclear starbursts in our LIRGs have ages of 1-4.5 Myr, metallicities of 1-2 Z{sub ?}, and ionization parameters of 2-8 10{sup 7} cm s{sup 1}. Based on the [S III]{sub 33.5{sub ?m}}/[S III]{sub 18.7{sub ?m}} ratios, the electron density in LIRG nuclei is typically one to a few hundred cm{sup 3}, with a median electron density of ?300 cm{sup 3}, for those sources above the low density limit for these lines. We also find that strong shocks are likely present in 10 starburst-dominated sources of our sample. A significant fraction of the GOALS sources (80) have resolved neon emission-line profiles (FWHM ?600 km s{sup 1}) and five show clear differences in the velocities of the [Ne III] or [Ne V] emission lines, relative to [Ne II], of more than 200 km s{sup 1}. Furthermore, six starburst and five active galactic nucleus dominated LIRGs show a clear trend of increasing line width with ionization potential, suggesting the possibility of a compact energy source and stratified interstellar medium in their nuclei. We confirm a strong correlation between the sum of the [Ne II]{sub 12.8{sub ?m}} and [Ne III]{sub 15.5{sub ?m}} emission, as well as [S III]{sub 33.5{sub ?m}}, with both the infrared luminosity and the 24 ?m warm dust emission measured from the spectra, consistent with all three lines tracing ongoing star formation. Finally, we find no correlation between the hardness of the radiation field or the emission-line width and the ratio of the total infrared to 8 ?m emission (IR8), a measure of the strength of the starburst and the distance of the LIRGs from the star-forming main sequence. This may be a function of the fact that the infrared luminosity and the mid-infrared fine-structure lines are sensitive to different timescales over the starburst, or that IR8 is more sensitive to the geometry of the region emitting the warm dust than the radiation field producing the H II region emission.

Inami, H. [National Optical Astronomy Observatory, Tucson, AZ 85719 (United States); Armus, L.; Stierwalt, S.; Daz-Santos, T.; Surace, J.; Howell, J.; Marshall, J. [Spitzer Science Center, California Institute of Technology, CA 91125 (United States); Charmandaris, V. [Department of Physics and Institute of Theoretical and Computational Physics, University of Crete, GR-71003 Heraklion (Greece); Groves, B. [Max Planck Institute for Astronomy, Knigstuhl 17, D-69117 Heidelberg (Germany); Kewley, L. [Research School of Astronomy and Astrophysics, The Australian National University, Cotter Road, Weston Creek, ACT 2611 (Australia); Petric, A. [Department of Astronomy, California Institute of Technology, MS 320-47, Pasadena, CA 91125 (United States); Rich, J. [The Observatories, Carnegie Institute of Washington, 813 Santa Barbara Street, Pasadena, CA 91101 (United States); Haan, S. [CSIRO Astronomy and Space Science, Marsfield, NSW 2122 (Australia); Evans, A. S. [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904 (United States); Mazzarella, J.; Lord, S. [Infrared Processing and Analysis Center, MS 100-22, California Institute of Technology, Pasadena, CA 91125 (United States); Appleton, P. [NASA Herschel Science Center, 770 South Wilson Avenue, Pasadena, CA 91125 (United States); Spoon, H. [Astronomy Department, Cornell University, Ithaca, NY 14853 (United States); Frayer, D. [National Radio Astronomy Observatory, P.O. Box 2, Green Bank, WV 24944 (United States); Matsuhara, H., E-mail: inami@noao.edu [Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan); and others

2013-11-10T23:59:59.000Z

255

The Effect of Equilibrating Mounted Dental Stone Casts in Maximum Intercuspation on the Occlusal Harmony of an Indirect Restoration  

E-Print Network (OSTI)

The purpose of this study was to determine if equilibration of dental stone casts mounted in maximum intercuspation can improve occlusal harmony of a cast gold restoration. A dentoform mounted on an articulator with crown preparation on tooth #19...

Benson, Peter Andrew

2013-12-13T23:59:59.000Z

256

An Eddy Parameterization Based on Maximum Entropy Production with Application to Modeling of the Arctic Ocean Circulation  

Science Journals Connector (OSTI)

An eddy parameterization derived from statistical mechanics of potential vorticity is applied for inviscid shallow-water equations. The solution of a variational problem based on the maximum entropy production (MEP) principle provides, with some ...

Igor Polyakov

2001-08-01T23:59:59.000Z

257

Predictors of Working Alliance Efficacy Among State VR Counselors as a Function of Ex-offender Status.  

E-Print Network (OSTI)

??The purpose of this study was to determine if statistically significant relationships existed between burnout, stigma, flourishing, caseload size, experience, and working alliance self-efficacy and (more)

Bates, Julie

2012-01-01T23:59:59.000Z

258

Efficacy, Safety, and Immunogenicity of an Enterovirus 71 Vaccine in China  

Science Journals Connector (OSTI)

...for 80% statistical power to show that the lower bound of the 95% confidence interval for vaccine efficacy exceeded that observed with placebo at a significance level of 0.05, assuming a vaccine efficacy rate of 80% and an incidence density of 8 cases of EV71-associated hand, foot, and mouth disease or... Enterovirus 71 (EV71) is an important cause of hand, foot, and mouth disease, especially in China. In this phase 3 trial involving 10,077 infants and children in China, an EV71 vaccine provided protection against EV71-associated disease.

Zhu F.; Xu W.; Xia J.

2014-02-27T23:59:59.000Z

259

Structure of Turbulence in Katabatic Flows below and above the Wind-Speed Maximum  

E-Print Network (OSTI)

Measurements of small-scale turbulence made over the complex-terrain atmospheric boundary layer during the MATERHORN Program are used to describe the structure of turbulence in katabatic flows. Turbulent and mean meteorological data were continuously measured at multiple levels at four towers deployed along the East lower slope (2-4 deg) of Granite Mountain. The multi-level observations made during a 30-day long MATERHORN-Fall field campaign in September-October 2012 allowed studying of temporal and spatial structure of katabatic flows in detail, and herein we report turbulence and their variations in katabatic winds. Observed vertical profiles show steep gradients near the surface, but in the layer above the slope jet the vertical variability is smaller. It is found that the vertical (normal to the slope) momentum flux and horizontal (along the slope) heat flux in a slope-following coordinate system change their sign below and above the wind maximum of a katabatic flow. The vertical momentum flux is directed...

Grachev, Andrey A; Di Sabatino, Silvana; Fernando, Harindra J S; Pardyjak, Eric R; Fairall, Christopher W

2015-01-01T23:59:59.000Z

260

Parametric study on maximum transportable distance and cost for thermal energy transportation using various coolants  

SciTech Connect

The operation temperature of advanced nuclear reactors is generally higher than commercial light water reactors and thermal energy from advanced nuclear reactor can be used for various purposes such as district heating, desalination, hydrogen production and other process heat applications, etc. The process heat industry/facilities will be located outside the nuclear island due to safety measures. This thermal energy from the reactor has to be transported a fair distance. In this study, analytical analysis was conducted to identify the maximum distance that thermal energy could be transported using various coolants such as molten-salts, helium and water by varying the pipe diameter and mass flow rate. The cost required to transport each coolant was also analyzed. The coolants analyzed are molten salts (such as: KClMgCl2, LiF-NaF-KF (FLiNaK) and KF-ZrF4), helium and water. Fluoride salts are superior because of better heat transport characteristics but chloride salts are most economical for higher temperature transportation purposes. For lower temperature water is a possible alternative when compared with He, because low pressure He requires higher pumping power which makes the process very inefficient and economically not viable for both low and high temperature application.

Su-Jong Yoon; Piyush Sabharwall

2014-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Occurrence of high-speed solar wind streams over the Grand Modern Maximum  

E-Print Network (OSTI)

In the declining phase of the solar cycle, when the new-polarity fields of the solar poles are strengthened by the transport of same-signed magnetic flux from lower latitudes, the polar coronal holes expand and form non-axisymmetric extensions toward the solar equator. These extensions enhance the occurrence of high-speed solar wind streams (HSS) and related co-rotating interaction regions in the low-latitude heliosphere, and cause moderate, recurrent geomagnetic activity in the near-Earth space. Here, using a novel definition of geomagnetic activity at high (polar cap) latitudes and the longest record of magnetic observations at a polar cap station, we calculate the annually averaged solar wind speeds as proxies for the effective annual occurrence of HSS over the whole Grand Modern Maximum (GMM) from 1920s onwards. We find that a period of high annual speeds (frequent occurrence of HSS) occurs in the declining phase of each solar cycle 16-23. For most cycles the HSS activity clearly maximizes during one year...

Mursula, Kalevi; Holappa, Lauri

2015-01-01T23:59:59.000Z

262

Depth of Maximum of Air-Shower Profiles at the Pierre Auger Observatory: Composition Implications  

E-Print Network (OSTI)

Using the data taken at the Pierre Auger Observatory between December 2004 and December 2012, we have examined the implications of the distributions of depths of atmospheric shower maximum (Xmax), using a hybrid technique, for composition and hadronic interaction models. We do this by fitting the distributions with predictions from a variety of hadronic interaction models for variations in the composition of the primary cosmic rays and examining the quality of the fit. Regardless of what interaction model is assumed, we find that our data are not well described by a mix of protons and iron nuclei over most of the energy range. Acceptable fits can be obtained when intermediate masses are included, and when this is done consistent results for the proton and iron-nuclei contributions can be found using the available models. We observe a strong energy dependence of the resulting proton fractions, and find no support from any of the models for a significant contribution from iron nuclei. However, we also observe a...

,

2014-01-01T23:59:59.000Z

263

Maximum Reasonable Radioxenon Releases from Medical Isotope Production Facilities and Their Effect on Monitoring Nuclear Explosions  

SciTech Connect

Fission gases such as 133Xe are used extensively for monitoring the world for signs of nuclear testing in systems such as the International Monitoring System (IMS). These gases are also produced by nuclear reactors and by fission production of 99Mo for medical use. Recently, medical isotope production facilities have been identified as the major contributor to the background of radioactive xenon isotopes (radioxenon) in the atmosphere (Saey, et al., 2009). These releases pose a potential future problem for monitoring nuclear explosions if not addressed. As a starting point, a maximum acceptable daily xenon emission rate was calculated, that is both scientifically defendable as not adversely affecting the IMS, but also consistent with what is possible to achieve in an operational environment. This study concludes that an emission of 5109 Bq/day from a medical isotope production facility would be both an acceptable upper limit from the perspective of minimal impact to monitoring stations, but also appears to be an achievable limit for large isotope producers.

Bowyer, Ted W. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Kephart, Rosara F.; Eslinger, Paul W. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Friese, Judah I. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Miley, Harry S. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Saey, Paul R. [Vienna University of Technology, Atomic Institute of the Austrian Universities, Vienna (Austria)

2013-01-01T23:59:59.000Z

264

Thermal properties for the thermal-hydraulics analyses of the BR2 maximum nominal heat flux.  

SciTech Connect

This memo describes the assumptions and references used in determining the thermal properties for the various materials used in the BR2 HEU (93% enriched in {sup 235}U) to LEU (19.75% enriched in {sup 235}U) conversion feasibility analysis. More specifically, this memo focuses on the materials contained within the pressure vessel (PV), i.e., the materials that are most relevant to the study of impact of the change of fuel from HEU to LEU. This section is regrouping all of the thermal property tables. Section 2 provides a summary of the thermal properties in form of tables while the following sections present the justification of these values. Section 3 presents a brief background on the approach used to evaluate the thermal properties of the dispersion fuel meat and specific heat capacity. Sections 4 to 7 discuss the material properties for the following materials: (i) aluminum, (ii) dispersion fuel meat (UAlx-Al and U-7Mo-Al), (iii) beryllium, and (iv) stainless steel. Section 8 discusses the impact of irradiation on material properties. Section 9 summarizes the material properties for typical operating temperatures. Appendix A elaborates on how to calculate dispersed phase's volume fraction. Appendix B shows the evolution of the BR2 maximum heat flux with burnup.

Dionne, B.; Kim, Y. S.; Hofman, G. L. (Nuclear Engineering Division) [Nuclear Engineering Division

2011-05-23T23:59:59.000Z

265

The wind potential impact on the maximum wind energy penetration in autonomous electrical grids  

Science Journals Connector (OSTI)

According to long-term wind speed measurements the Aegean Archipelago possesses excellent wind potential, hence properly designed wind energy applications can substantially contribute to fulfill the energy requirements of the island societies. On top of this, in most islands the electricity production cost is extremely high, while significant insufficient power supply problems are often encountered, especially during the summer. Unfortunately, the stochastic behaviour of the wind and the important fluctuations of daily and seasonal electricity load pose a strict penetration limit for the contribution of wind energy in the corresponding load demand. The application of this limit is necessary in order to avoid hazardous electricity grid fluctuations and to protect the existing thermal power units from operating near or below their technical minima. In this context, the main target of the proposed study is to present an integrated methodology able to estimate the maximum wind energy penetration in autonomous electrical grids on the basis of the available wind potential existing in the Aegean Archipelago area. For this purpose a large number of representative wind potential types have been investigated and interesting conclusions have been derived.

J.K. Kaldellis

2008-01-01T23:59:59.000Z

266

Collective efficacy as identified by teachers at Heritage Middle School, East Central Independent School District, San Antonio, Texas  

E-Print Network (OSTI)

the students at Heritage Middle School successful. iv The second question studied was, What is the relationship between selected demographic variables and the perceptions of the teachers regarding collective efficacy at Heritage Middle School, East Central... Based on Ethnicity ............................................................................................. 64 10 Independent Samples t-test of the White and Hispanic Teachers From Heritage Middle School in the Perceived Collective Efficacy Survey...

Naumann, Luisa Maria

2008-10-10T23:59:59.000Z

267

REAL-WORLD EFFICACY OF HEAVY DUTY DIESEL TRUCK NOX AND PM EMISSIONS CONTROLS  

E-Print Network (OSTI)

are International. b DOC = Diesel Oxidation Catalyst; DPF = Diesel Particulate Filter; EGR = Exhaust GasREAL-WORLD EFFICACY OF HEAVY DUTY DIESEL TRUCK NOX AND PM EMISSIONS CONTROLS Gurdas Sandhu H 26-28, 2012 #12;2 Objectives 1. Quantify inter-run variability in exhaust emission rates 2. Assess

Frey, H. Christopher

268

OBIT DEVELOPMENT MEMO SERIES NO. 21 1 Efficacy of Obit Threading on an EVLA Dataset  

E-Print Network (OSTI)

OBIT DEVELOPMENT MEMO SERIES NO. 21 1 Efficacy of Obit Threading on an EVLA Dataset W. D. Cotton, R of the Obit wide bandwidth imager MFImage in realistic tests on an EVLA dataset including multiple iterations://www.cv.nrao.edu/bcotton/Obit.html) to do wide- band imaging of a recent EVLA dataset. This test uses multiple iterations of self

Groppi, Christopher

269

Efficacy of intramuscular amopyroquin for treatment of Plasmodium falciparum malaria in the Gabon Republic.  

Science Journals Connector (OSTI)

...of Plasmodium falciparum malaria in the Gabon Republic. C Gaudebout E Pussard F Clavier...152 patients (children and adults) in Gabon with Plasmodium falciparum malaria. All...of Plasmodium falciparum malaria in the Gabon Republic. | The efficacy of a 12-mg...

C Gaudebout; E Pussard; F Clavier; D Gueret; J Le Bras; O Brandicourt; F Verdier

1993-05-01T23:59:59.000Z

270

Efficacy of Imazapyr and Glyphosate in the Control of Non-Native Phragmites australis  

E-Print Network (OSTI)

Efficacy of Imazapyr and Glyphosate in the Control of Non-Native Phragmites australis Thomas J reed (Phragmites australis) has been expanding into previously unoccupied wetland habitats throughout, phragmites, wetlands. Introduction The common reed (Phragmites australis (Cav.) Trin. Ex Steud.) has been

McGlathery, Karen

271

Evaluation of a photovoltaic energy mechatronics system with a built-in quadratic maximum power point tracking algorithm  

SciTech Connect

The historically high cost of crude oil price is stimulating research into solar (green) energy as an alternative energy source. In general, applications with large solar energy output require a maximum power point tracking (MPPT) algorithm to optimize the power generated by the photovoltaic effect. This work aims to provide a stand-alone solution for solar energy applications by integrating a DC/DC buck converter to a newly developed quadratic MPPT algorithm along with its appropriate software and hardware. The quadratic MPPT method utilizes three previously used duty cycles with their corresponding power outputs. It approaches the maximum value by using a second order polynomial formula, which converges faster than the existing MPPT algorithm. The hardware implementation takes advantage of the real-time controller system from National Instruments, USA. Experimental results have shown that the proposed solar mechatronics system can correctly and effectively track the maximum power point without any difficulties. (author)

Chao, R.M.; Ko, S.H.; Lin, I.H. [Department of Systems and Naval Mechatronics Engineering, National Cheng Kung University, Tainan, Taiwan 701 (China); Pai, F.S. [Department of Electronic Engineering, National University of Tainan (China); Chang, C.C. [Department of Environment and Energy, National University of Tainan (China)

2009-12-15T23:59:59.000Z

272

Eliminating the Renormalization Scale Ambiguity for Top-Pair Production Using the Principle of Maximum Conformality  

SciTech Connect

The uncertainty in setting the renormalization scale in finite-order perturbative QCD predictions using standard methods substantially reduces the precision of tests of the Standard Model in collider experiments. It is conventional to choose a typical momentum transfer of the process as the renormalization scale and take an arbitrary range to estimate the uncertainty in the QCD prediction. However, predictions using this procedure depend on the choice of renormalization scheme, leave a non-convergent renormalon perturbative series, and moreover, one obtains incorrect results when applied to QED processes. In contrast, if one fixes the renormalization scale using the Principle of Maximum Conformality (PMC), all non-conformal {l_brace}{beta}{sub i}{r_brace}-terms in the perturbative expansion series are summed into the running coupling, and one obtains a unique, scale-fixed, scheme-independent prediction at any finite order. The PMC renormalization scale {mu}{sub R}{sup PMC} and the resulting finite-order PMC prediction are both to high accuracy independent of choice of the initial renormalization scale {mu}{sub R}{sup init}, consistent with renormalization group invariance. Moreover, after PMC scale-setting, the n!-growth of the pQCD expansion is eliminated. Even the residual scale-dependence at fixed order due to unknown higher-order {l_brace}{beta}{sub i}{r_brace}-terms is substantially suppressed. As an application, we apply the PMC procedure to obtain NNLO predictions for the t{bar t}-pair hadroproduction cross-section at the Tevatron and LHC colliders. There are no renormalization scale or scheme uncertainties, thus greatly improving the precision of the QCD prediction. The PMC prediction for {sigma}{sub t{bar t}} is larger in magnitude in comparison with the conventional scale-setting method, and it agrees well with the present Tevatron and LHC data. We also verify that the initial scale-independence of the PMC prediction is satisfied to high accuracy at the NNLO level: the total cross-section remains almost unchanged even when taking very disparate initial scales {mu}{sub R}{sup init} equal to m{sub t}, 20 m{sub t}, {radical}s.

Brodsky, Stanley J.; /SLAC; Wu, Xing-Gang; /Chongqing U.

2012-04-02T23:59:59.000Z

273

Efficacy of ICON(R) Maxx in the laboratory and against insecticide-resistant Anopheles gambiae in central Cote d'Ivoire  

E-Print Network (OSTI)

21]. Bioassays Efficacy of ICON Maxx was assessed in WHOand blood-feeding rate in ICON Maxx-treated huts versusOpen Access Efficacy of ICON Maxx in the laboratory and

2012-01-01T23:59:59.000Z

274

VLT-SINFONI integral field spectroscopy of low-z luminous and ultraluminous infrared galaxies I. Atlas of the 2D gas structure  

E-Print Network (OSTI)

We present an atlas of a sample of local (U)LIRGs covering the luminosity range log(L_IR/L_sun)=11.1-12.4. The atlas is based on near-infrared H and K-band VLT-SINFONI IFS, and presents the ionised, partially ionised, and warm molecular gas 2D flux distributions and kinematics over a FoV of 3x3 kpc (LIRGs) and 12x12kpc (ULIRGs) and with average linear resolutions of 0.2kpc and 0.9kpc, respectively. The different phases of the gas show a wide morphological variety with the nucleus as the brightest Br_g source for 33% of the LIRGs and 71% of the ULIRGs, whereas all the (U)LIRGs have their maximum H_2 emission in their nuclear regions. In LIRGs, the ionised gas distribution is dominated by the emission from the star-forming rings or giant HII regions in the spiral arms. The Br_g and [FeII] line at 1.644 micron trace the same structures, although the emission peaks at different locations in some of the objects, and the [FeII] seems to be more extended and diffuse. The ULIRG subsample contains mainly pre-coalescen...

Lpez, J Piqueras; Arribas, S; Alonso-Herrero, A; Bedregal, A G

2012-01-01T23:59:59.000Z

275

Exploring wind-driving dust species in cool luminous giants III. Wind models for M-type AGB stars: dynamic and photometric properties  

E-Print Network (OSTI)

Stellar winds observed in asymptotic giant branch (AGB) stars are usually attributed to a combination of stellar pulsations and radiation pressure on dust. Shock waves triggered by pulsations propagate through the atmosphere, compressing the gas and lifting it to cooler regions, which create favourable conditions for grain growth. If sufficient radiative acceleration is exerted on the newly formed grains through absorption or scattering of stellar photons, an outflow can be triggered. Strong candidates for wind-driving dust species in M-type AGB stars are magnesium silicates (Mg$_2$SiO$_4$ and MgSiO$_3$). Such grains can form close to the stellar surface, they consist of abundant materials and, if they grow to sizes comparable to the wavelength of the stellar flux maximum, they experience strong acceleration by photon scattering. We use a frequency-dependent radiation-hydrodynamics code with a detailed description for the growth of Mg$_2$SiO$_4$ grains to calculate the first extensive set of time-dependent wi...

Bladh, S; Aringer, B; Eriksson, K

2015-01-01T23:59:59.000Z

276

Improved maximum cooling by optimizing the geometry of thermoelectric leg elements Yan Zhang, Zhixi Bian and Ali Shakouri*  

E-Print Network (OSTI)

in improving the thermoelectric efficiency and maximum cooling mainly focuses on improving materials' figure , power factor; , thermal conductivity. Bi2Te3 has been the most popular thermoelectric material at room a high power factor. Most of the recent research on thermoelectrics focuses on improving the material

277

Maximum-Intensity Volumes for Fast Contouring of Lung Tumors Including Respiratory Motion in 4DCT Planning  

SciTech Connect

Purpose: To assess the accuracy of maximum-intensity volumes (MIV) for fast contouring of lung tumors including respiratory motion. Methods and Materials: Four-dimensional computed tomography (4DCT) data of 10 patients were acquired. Maximum-intensity volumes were constructed by assigning the maximum Hounsfield unit in all CT volumes per geometric voxel to a new, synthetic volume. Gross tumor volumes (GTVs) were contoured on all CT volumes, and their union was constructed. The GTV with all its respiratory motion was contoured on the MIV as well. Union GTVs and GTVs including motion were compared visually. Furthermore, planning target volumes (PTVs) were constructed for the union of GTVs and the GTV on MIV. These PTVs were compared by centroid position, volume, geometric extent, and surface distance. Results: Visual comparison of GTVs demonstrated failure of the MIV technique for 5 of 10 patients. For adequate GTV{sub MIV}s, differences between PTVs were <1.0 mm in centroid position, 5% in volume, {+-}5 mm in geometric extent, and {+-}0.5 {+-} 2.0 mm in surface distance. These values represent the uncertainties for successful MIV contouring. Conclusion: Maximum-intensity volumes are a good first estimate for target volume definition including respiratory motion. However, it seems mandatory to validate each individual MIV by overlaying it on a movie loop displaying the 4DCT data and editing it for possible inadequate coverage of GTVs on additional 4DCT motion states.

Rietzel, Eike [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States); Abteilung Biophysik, Gesellschaft fuer Schwerionenforschung, Darmstadt (Germany)], E-mail: eike@rietzel.net; Liu, Arthur K.; Chen, George T.Y.; Choi, Noah C. [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States)

2008-07-15T23:59:59.000Z

278

OSRAM SYLVANIA Demonstrates 1,439-Lumen Downlight with Efficacy of 82 lm/W  

Energy.gov (U.S. Department of Energy (DOE))

OSRAM SYLVANIA researchers have demonstrated a downlight luminaire that achieves 1,439 lumens at an efficacy of 82 lm/W in steady-state operation. These results exceed the project goals of achieving 1,300 lumens and 70 lm/W at a CCT of 3500K and CRI of 80. Improvements in LED chips, phosphors, optics, electronics, and thermal management at OSRAM all contributed to the higher-than-projected luminaire performance.

279

Brain-Penetrating Nanoparticles Improve Paclitaxel Efficacy in Malignant Glioma Following Local Administration  

Science Journals Connector (OSTI)

Brain-Penetrating Nanoparticles Improve Paclitaxel Efficacy in Malignant Glioma Following Local Administration ... At day 15 after tumor inoculation, brains were harvested standard hematoxylin and eosin (H&E) staining to identify any changes in histological architecture, cell morphology, cellularity, and overall tumor integrity caused by the treatment. ... A 400-kHz focused ultrasound generator was used to transcranially disrupt the blood-brain barrier (BBB) in rat brains by delivering burst-tone ultrasound energy in the presence of microbubbles. ...

Elizabeth Nance; Clark Zhang; Ting-Yu Shih; Qingguo Xu; Benjamin S. Schuster; Justin Hanes

2014-09-26T23:59:59.000Z

280

Influence of top removal on tebuthiuron efficacy for live oak control  

E-Print Network (OSTI)

1986 Major Subject: Range Science INFLUENCE OF TOP REMOVAL ON TEBUTHIURON EFFICACY FOR LIVE OAK CONTROL A Thesis by STEPHEN MICHAEL SWETISH Approved as to style and content by: Char es J cifr (Chair of Committee) Rodney W. Bovey (Member.... ACKNOWLEDGEMENTS I extend my love and appreciation to my lovely wife Liz for her understanding and support throughout the term of this study. Also, special thanks to my parents Paul and Elvira Swetish for their never ending supoort and confidence. I wish...

Swetish, Stephen Michael

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
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281

Outcome-expectancy and self-efficacy: Reasons or results of flood preparedness intention?  

Science Journals Connector (OSTI)

Abstract This study will examine whether the relationship between flood disaster preparedness intention and outcome-expectancy is mediated by self-efficacy (Casual chain model) or whether outcome-expectancy and self-efficacy of a disaster preparedness measure and/or action are expression of a more general attitude toward disaster preparedness (Associationist view). The nature of relationships between these three variables had been explored by comparing the zero-order relations and the correlations after controlling the third variable. The study primarily was on a survey conducted through face to face structured interviews in three flood prone slum communities in Mumbai. We found that Casual chain method was applicable only for evacuation behavior, otherwise strong support was observed in favor of Associationist view in other flood preparedness measures such as raising plinth level, use durable building materials, store drinking water and food and using sandbags. These findings counter the conventional cognitive approach or casual chain model which advocates the relationship between outcome-expectancy, self-efficacy and preparedness intention; respectively sequential. Instead, this study suggest that disaster preparedness in many cases may depend on individuals general attitude which may be governed by their culture and group norms.

Subhajyoti Samaddar; Roshni Chatterjee; Bijayanad Misra; Hirokazu Tatano

2014-01-01T23:59:59.000Z

282

AN EMPIRICAL INVESTIGATION INTO THE MODERATING RELATIONSHIP OF COMPUTER SELF-EFFICACY ON PERFORMANCE IN A COMPUTER-SUPPORTED TASK  

E-Print Network (OSTI)

Computer Self-Efficacy has been shown to be a critical construct in a number of research areas within the Information Systems literature, most notably training, technology adoption, and performance in computer-related tasks. Attention has been...

Aguirre Urreta, Miguel Ignacio

2008-01-01T23:59:59.000Z

283

Abstract 2986: Novel vascular targeting strategy using pegylated liposomal doxorubicin to increase drug accumulation to tumor site and therapeutic efficacy  

Science Journals Connector (OSTI)

...and therapeutic efficacy Kenji Yokoi Tomonori Tanei Yuki Saito Mauro Ferrari Houston Methodist Research Institute, Houston, TX...Citation Format: Kenji Yokoi, Tomonori Tanei, Yuki Saito, Mauro Ferrari. Novel vascular targeting strategy using pegylated...

Kenji Yokoi; Tomonori Tanei; Yuki Saito; Mauro Ferrari

2014-10-01T23:59:59.000Z

284

The Efficacy of Trichlorphon and Naphthalophos against Multiple Anthelmintic-Resistant Nematodes of Naturally Infected Sheep in Argentina  

Science Journals Connector (OSTI)

An anthelmintic efficacy trial was conducted in sheep harbouring anthelmintic-resistant worms in Argentina. Seventy lambs were selected from a flock that had been grazed on pastures infected with trichostrongy...

Csar Fiel; Maricel Guzmn; Pedro Steffan; Edgardo Rodriguez

2011-08-01T23:59:59.000Z

285

The potential impact of global warming on the efficacy of field margins sown for the conservation of bumble-bees  

Science Journals Connector (OSTI)

...Raffaelli The potential impact of global warming on the efficacy of field margins...change. We simulated the effect of global warming on the network of plant-pollinator...future-proof margins against global warming are discussed. climate change...

2010-01-01T23:59:59.000Z

286

Abstract 835: Fisetin enhances the efficacy of cabazitaxel chemotherapy in prostate metastatic and multidrug- resistant cancer cells  

Science Journals Connector (OSTI)

...2014; San Diego, CA Abstract 835: Fisetin enhances the efficacy of cabazitaxel chemotherapy...patients. Here, we investigated whether fisetin, a dietary flavonoid, could sensitize...cabazitaxel treatment. The effect of fisetin in enhancing the response of cancer cells...

Eiman Mukhtar; Vaqar Mustafa Adhami; Hasan Mukhtar

2014-10-01T23:59:59.000Z

287

Development and Validation of an In Vitro Pharmacokinetic/Pharmacodynamic Model to Test the Antibacterial Efficacy of Antibiotic Polymer Conjugates.  

Science Journals Connector (OSTI)

...Rights Reserved. 2014 research-article Development and Validation of an In Vitro Pharmacokinetic/Pharmacodynamic Model to Test the Antibacterial Efficacy of Antibiotic Polymer Conjugates. Ernest A. Azzopardi 1 2 * Elaine L. Ferguson 1 David W. Thomas...

Ernest A. Azzopardi; Elaine L. Ferguson; David W. Thomas

2014-12-15T23:59:59.000Z

288

Encapsulated interferon-tau during Theiler's virus-induced demyelinating disease: efficacy of treatment and immune response profile  

E-Print Network (OSTI)

significant number suffer severe negative side effects and must cease treatment. Thus, alternative therapeutics that offer less cytotoxicity and greater efficacy are a major objective of research. This dissertation evaluated a novel type I interferon...

Dean, Dana Deanna

2009-05-15T23:59:59.000Z

289

Teacher self-efficacy in Cape Town : a bottom up approach to enhancing the quality of education  

E-Print Network (OSTI)

Personal teacher self-efficacy (PTE), or the belief in one's own ability to overcome a particular challenge, often acts as a catalyst for teachers to improve the effectiveness of their teaching. Gaining PTE can translate ...

Kim, YeSeul

2011-01-01T23:59:59.000Z

290

Room at the Mountain: Estimated Maximum Amounts of Commercial Spent Nuclear Fuel Capable of Disposal in a Yucca Mountain Repository  

SciTech Connect

The purpose of this paper is to present an initial analysis of the maximum amount of commercial spent nuclear fuel (CSNF) that could be emplaced into a geological repository at Yucca Mountain. This analysis identifies and uses programmatic, material, and geological constraints and factors that affect this estimation of maximum amount of CSNF for disposal. The conclusion of this initial analysis is that the current legislative limit on Yucca Mountain disposal capacity, 63,000 MTHM of CSNF, is a small fraction of the available physical capacity of the Yucca Mountain system assuming the current high-temperature operating mode (HTOM) design. EPRI is confident that at least four times the legislative limit for CSNF ({approx}260,000 MTHM) can be emplaced in the Yucca Mountain system. It is possible that with additional site characterization, upwards of nine times the legislative limit ({approx}570,000 MTHM) could be emplaced. (authors)

Kessler, John H. [Electric Power Research Institute - EPRI, 3420 Hillview Avenue, Palo Alto, California 94304 (United States); Kemeny, John [University of Arizona, Tucson AZ 85721 (United States); King, Fraser [Integrity Corrosion Consulting, Ltd., 6732 Silverview Drive NW, Calgary, Alberta (Canada); Ross, Alan M. [Alan M. Ross and Associates, 1061 Gray Fox Circle Pleasanton, CA 94566 (Canada); Ross, Benjamen [Disposal Safety, Inc., Bethesda, MD 20814 (United States)

2006-07-01T23:59:59.000Z

291

Compact stars with a small electric charge: the limiting radius to mass relation and the maximum mass for incompressible matter  

E-Print Network (OSTI)

One of the stiffest equations of state for matter in a compact star is constant energy density and this generates the interior Schwarzschild radius to mass relation and the Misner maximum mass for relativistic compact stars. If dark matter populates the interior of stars, and this matter is supersymmetric or of some other type, some of it possessing a tiny electric charge, there is the possibility that highly compact stars can trap a small but non-negligible electric charge. In this case the radius to mass relation for such compact stars should get modifications. We use an analytical scheme to investigate the limiting radius to mass relation and the maximum mass of relativistic stars made of an incompressible fluid with a small electric charge. The investigation is carried out by using the hydrostatic equilibrium equation, i.e., the Tolman-Oppenheimer-Volkoff (TOV) equation, together with the other equations of structure, with the further hypothesis that the charge distribution is proportional to the energy density. The approach relies on Volkoff and Misner's method to solve the TOV equation. For zero charge one gets the interior Schwarzschild limit, and supposing incompressible boson or fermion matter with constituents with masses of the order of the neutron mass one gets that the maximum mass is the Misner mass. For a small electric charge, our analytical approximating scheme valid in first order in the star's electric charge, shows that the maximum mass increases relatively to the uncharged case, whereas the minimum possible radius decreases, an expected effect since the new field is repulsive aiding the pressure to sustain the star against gravitational collapse.

Jos P. S. Lemos; Francisco J. Lopes; Gonalo Quinta; Vilson T. Zanchin

2015-01-09T23:59:59.000Z

292

SUZAKU VIEW OF THE SWIFT/BAT ACTIVE GALACTIC NUCLEI. V. TORUS STRUCTURE OF TWO LUMINOUS RADIO-LOUD ACTIVE GALACTIC NUCLEI (3C 206 AND PKS 0707-35)  

SciTech Connect

We present the results from broadband X-ray spectral analysis of 3C 206 and PKS 0707-35 with Suzaku and Swift/BAT, two of the most luminous unobscured and obscured radio-loud active galactic nuclei (AGNs) with hard X-ray luminosities of 10{sup 45.5} erg s{sup -1} and 10{sup 44.9} erg s{sup -1} (14-195 keV), respectively. Based on the radio core luminosity, we estimate that the X-ray spectrum of 3C 206 contains a significant ({approx}60% in the 14-195 keV band) contribution from the jet, while it is negligible in PKS 0707-35. We can successfully model the spectra with the jet component (for 3C 206), the transmitted emission, and two reflection components from the torus and the accretion disk. The reflection strengths from the torus are found to be R{sub torus}({identical_to} {Omega}/2{pi}) = 0.29 {+-} 0.18 and 0.41 {+-} 0.18 for 3C 206 and PKS 0707-35, respectively, which are smaller than those in typical Seyfert galaxies. Utilizing the torus model by Ikeda et al., we quantify the relation between the half-opening angle of a torus ({theta}{sub oa}) and the equivalent width of an iron-K line. The observed equivalent width of 3C 206, < 71 eV, constrains the column density in the equatorial plane to N{sub H}{sup eq} <10{sup 23} cm{sup -2}, or the half-opening angle to {theta}{sub oa} > 80 Degree-Sign if N{sub H}{sup eq} =10{sup 24} cm{sup -2} is assumed. That of PKS 0707-35, 72 {+-} 36 eV, is consistent with N{sub H}{sup eq} {approx}10{sup 23} cm{sup -2}. Our results suggest that the tori in luminous radio-loud AGNs are only poorly developed. The trend is similar to that seen in radio-quiet AGNs, implying that the torus structure is not different between AGNs with jets and without jets.

Tazaki, Fumie; Ueda, Yoshihiro [Department of Astronomy, Kyoto University, Kyoto 606-8502 (Japan); Terashima, Yuichi [Department of Physics, Ehime University, Matsuyama 790-8577 (Japan); Mushotzky, Richard F.; Tombesi, Francesco [Department of Astronomy, University of Maryland, College Park, MD 20742-2421 (United States)

2013-07-20T23:59:59.000Z

293

Development of a methodology to evaluate probable maximum precipitation (PMP) under changing climate conditions: Application to southern Quebec, Canada  

Science Journals Connector (OSTI)

Summary Climate change (CC) needs to be accounted for in the estimation of probable maximum floods (PMFs). However, there does not exist a unique way to estimate \\{PMFs\\} and, furthermore the challenge in estimating them is that they should neither be underestimated for safety reasons nor overestimated for economical ones. By estimating \\{PMFs\\} without accounting for CC, the risk of underestimation could be high for Quebec, Canada, since future climate simulations indicate that in all likelihood extreme precipitation events will intensify. In this paper, simulation outputs from the Canadian Regional Climate Model (CRCM) are used to develop a methodology to estimate probable maximum precipitations (PMPs) while accounting for changing climate conditions for the southern region of the Province of Quebec, Canada. The Knogami and Yamaska watersheds are herein of particular interest, since dam failures could lead to major downstream impacts. Precipitable water (w) represents one of the key variables in the estimation process of PMPs. Results of stationary tests indicate that CC will not only affect precipitation and temperature but also the monthly maximum precipitable water, wmax, and the ensuing maximization ratio used for the estimation of PMPs. An up-to-date computational method is developed to maximize w using a non-stationary frequency analysis, and then calculate the maximization ratios. The ratios estimated this way are deemed reliable since they rarely exceed threshold values set for Quebec, and, therefore, provide consistent PMP estimates. The results show an overall significant increase of the \\{PMPs\\} throughout the current century compared to the recent past.

Alain N. Rousseau; Iris M. Klein; Daphn Freudiger; Patrick Gagnon; Anne Frigon; Claudie Ratt-Fortin

2014-01-01T23:59:59.000Z

294

Excellent color rendering indexes of multi-package white LEDs  

Science Journals Connector (OSTI)

This study introduces multi-package white light-emitting diodes (LEDs) system with the ability to realize high luminous efficacy and an excellent color rendering index (CRI,...

Oh, Ji Hye; Yang, Su Ji; Sung, Yeon-Goog; Do, Y R

2012-01-01T23:59:59.000Z

295

Statistical analysis of COMPTEL maximum likelihood-ratio distributions: evidence for a signal from previously undetected AGN  

SciTech Connect

The maximum likelihood-ratio method is frequently used in COMPTEL analysis to determine the significance of a point source at a given location. In this paper we do not consider whether the likelihood-ratio at a particular location indicates a detection, but rather whether distributions of likelihood-ratios derived from many locations depart from that expected for source free data. We have constructed distributions of likelihood-ratios by reading values from standard COMPTEL maximum-likelihood ratio maps at positions corresponding to the locations of different categories of AGN. Distributions derived from the locations of Seyfert galaxies are indistinguishable, according to a Kolmogorov-Smirnov test, from those obtained from ''random'' locations, but differ slightly from those obtained from the locations of flat spectrum radio loud quasars, OVVs, and BL Lac objects. This difference is not due to known COMPTEL sources, since regions near these sources are excluded from the analysis. We suggest that it might arise from a number of sources with fluxes below the COMPTEL detection threshold.

Williams, O. R.; Bennett, K.; Much, R. [Astrophysics Division, ESTEC, P.O. Box 299, NL-2200 AG Noordwijk (Netherlands); Schoenfelder, V. [Max-Planck Institut fuer Extraterrestrische Physik, P.O. Box 1603, 85740 Garching (Germany); Blom, J. J. [SRON-Utrecht, Sorbonnelaan 2, NL-3584 CA Utrecht (Netherlands); Ryan, J. [Space Science Center, Univ. of New Hampshire, Durham New Hampshire 03824 (United States)

1997-05-10T23:59:59.000Z

296

Potential cellular targets and antibacterial efficacy of atmospheric pressure non-thermal plasma  

Science Journals Connector (OSTI)

Abstract Atmospheric pressure non-thermal plasma (APNTP) has been gaining increasing interest as a new alternative antibacterial approach. Although this approach has demonstrated promising antibacterial activity, its exact mechanism of action remains unclear. Mechanistic elucidation of the antimicrobial activity will facilitate development and rational optimisation of this approach for potential medical applications. In this study, the antibacterial efficacy of an in-house-built APNTP jet was evaluated alongside an investigation of the interactions between APNTP and major cellular components in order to identify the potential cellular targets involved in plasma-mediated bacterial destruction mechanisms. The investigated plasma jet exhibited excellent, rapid antibacterial activity against a selected panel of clinically significant bacterial species including Bacillus cereus, meticillin-resistant Staphylococcus aureus (MRSA), Escherichia coli and Pseudomonas aeruginosa, all of which were completely inactivated within 2min of plasma exposure. Plasma-mediated damaging effects were observed, to varying degrees, on all of the investigated cellular components including DNA, a model protein enzyme, and lipid membrane integrity and permeability. The antibacterial efficacy of APNTP appears to involve a multiple-target mechanism, which potentially reduces the likelihood of emergence of microbial resistance towards this promising antimicrobial approach. However, cellular membrane damage and resulting permeability perturbation was found to be the most likely rate-determining step in this mechanism.

Mahmoud Y. Alkawareek; Sean P. Gorman; William G. Graham; Brendan F. Gilmore

2014-01-01T23:59:59.000Z

297

Efficacy and Safety of a Novel Vascular Closure Device (Glubran 2 Seal) After Diagnostic and Interventional Angiography in Patients with Peripheral Arterial Occlusive Disease  

SciTech Connect

To prospectively evaluate safety and efficacy of a novel vascular closure device (Glubran 2 Seal) after peripheral angiography in patients with peripheral arterial occlusive disease (PAOD). From December 2010 to June 2011, all consecutive patients with PAOD undergoing peripheral angiography were prospectively enrolled onto the study after percutaneous antegrade or retrograde puncture of the common femoral artery. After angiography, the Glubran 2 Seal device was used to achieve hemostasis. The following data were registered: technical success and manual compression duration, patients' discomfort (scale 0-5), operators' technical difficulty (scale 0-5), and vascular complications. The site of hemostasis was evaluated by clinical inspection and color-coded Duplex ultrasound performed 1 day and 1 month after the procedure. One hundred seventy-eight patients were enrolled (112 male, mean age 70.8 years) with a total of 206 puncture sites, including 104 (50.5 %) antegrade accesses. The device was successful in 198(96.1 %) of 206 procedures, with 8 cases of manual compression lasting longer than 5 min (maximum 20 min). No major vascular complications were observed, resulting in 100 % procedural success. Minor complications occurred in seven procedures (3.4 %), including two cases of pseudoaneurysms, successfully treated by ultrasound-guided glue injection. The mean {+-} standard deviation score for patients' discomfort was 0.9 {+-} 0.7, whereas the mean score for operators' difficulty was 1.2 {+-} 0.9. In patients with PAOD, the Glubran 2 Seal represents a simple, painless, and efficient vascular closure device, able to achieve hemostasis both in antegrade and retrograde accesses.

Del Corso, Andrea [University of Pisa, Department of Vascular Surgery (Italy)] [University of Pisa, Department of Vascular Surgery (Italy); Bargellini, Irene, E-mail: irenebargellini@hotmail.com; Cicorelli, Antonio; Perrone, Orsola [University of Pisa, Department of Diagnostic and Interventional Radiology (Italy)] [University of Pisa, Department of Diagnostic and Interventional Radiology (Italy); Leo, Michele [University of Pisa, Department of Vascular Surgery (Italy)] [University of Pisa, Department of Vascular Surgery (Italy); Lunardi, Alessandro [University of Pisa, Department of Diagnostic and Interventional Radiology (Italy)] [University of Pisa, Department of Diagnostic and Interventional Radiology (Italy); Alberti, Aldo; Tomei, Francesca [University of Pisa, Department of Vascular Surgery (Italy)] [University of Pisa, Department of Vascular Surgery (Italy); Cioni, Roberto [University of Pisa, Department of Diagnostic and Interventional Radiology (Italy)] [University of Pisa, Department of Diagnostic and Interventional Radiology (Italy); Ferrari, Mauro [University of Pisa, Department of Vascular Surgery (Italy)] [University of Pisa, Department of Vascular Surgery (Italy); Bartolozzi, Carlo [University of Pisa, Department of Diagnostic and Interventional Radiology (Italy)] [University of Pisa, Department of Diagnostic and Interventional Radiology (Italy)

2013-04-15T23:59:59.000Z

298

Tumor blood vessel "normalization" improves the therapeutic efficacy of boron neutron capture therapy (BNCT) in experimental oral cancer  

SciTech Connect

We previously demonstrated the efficacy of BNCT mediated by boronophenylalanine (BPA) to treat tumors in a hamster cheek pouch model of oral cancer with no normal tissue radiotoxicity and moderate, albeit reversible, mucositis in precancerous tissue around treated tumors. It is known that boron targeting of the largest possible proportion of tumor cells contributes to the success of BNCT and that tumor blood vessel normalization improves drug delivery to the tumor. Within this context, the aim of the present study was to evaluate the effect of blood vessel normalization on the therapeutic efficacy and potential radiotoxicity of BNCT in the hamster cheek pouch model of oral cancer.

D. W. Nigg

2012-01-01T23:59:59.000Z

299

Density Functional Theory for Fractional Particle Number: Derivative Discontinuity of the Energy at the Maximum Number of Bound Electrons  

E-Print Network (OSTI)

The derivative discontinuity in the exact exchange-correlation potential of ensemble Density Functional Theory (DFT) is investigated at the specific integer number that corresponds to the maximum number of bound electrons, $J_{max}$. A recently developed complex-scaled analog of DFT is extended to fractional particle numbers and used to study ensembles of both bound and metastable states. It is found that the exact exchange-correlation potential experiences discontinuous jumps at integer particle numbers including $J_{max}$. For integers below $J_{max}$ the jump is purely real because of the real shift in the chemical potential. At $J_{max}$, the jump has a non-zero imaginary component reflecting the finite lifetime of the $(J_{max}+1)$ state.

Daniel L. Whitenack; Yu Zhang; Adam Wasserman

2011-11-08T23:59:59.000Z

300

Maximum edge-cuts in~cubic graphs with large girth and in~random cubic graphs  

E-Print Network (OSTI)

We show that for every cubic graph G with sufficiently large girth there exists a probability distribution on edge-cuts of G such that each edge is in a randomly chosen cut with probability at least 0.88672. This implies that G contains an edge-cut of size at least 1.33008n, where n is the number of vertices of G, and has fractional cut covering number at most 1.12776. The lower bound on the size of maximum edge-cut also applies to random cubic graphs. Specifically, a random n-vertex cubic graph a.a.s. contains an edge cut of size 1.33008n.

Kardos, Frantisek; Volec, Jan

2011-01-01T23:59:59.000Z

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301

Switching characteristics and maximum repetitive frequency of InGaAsP/InP bistable injection lasers  

SciTech Connect

Switching characteristics of nonuniformly pumped InGaAsP/InP BH Structure bistable lasers are investigated both experimentally and theoretically. First observation of automatic turn-on phenomenon was made, which is found to be a random process. For repetitive operation, turn-on delay time and necessary duration of switch-off pulse practically limited the maximum repetitive frequency. For ''switch-on,'' triggering the saturable absorption region is more effective. For reducing the minimum switch-off pulse width, either higher doping or reverse biasing at the absorption region is recommended. Tradeoff relation of OFF pulse width with threshold current and stable operation are discussed. With some improvements in device parameters, bistable operation at repetitive frequency over 1 GHz is expected.

Liu, H.F.; Hashimoto, Y.; Kamiya, T.

1988-01-01T23:59:59.000Z

302

Autothermal Reforming of Glycerol with Supercritical Water for Maximum Power through a Turbine Plus a Fuel Cell  

Science Journals Connector (OSTI)

An autothermal reforming of glycerol process using supercritical water was proposed to produce maximum power by means of a turbine, from the huge pressure energy of product gas just at the outlet of the reformer, and a proton exchange membrane (PEM) fuel cell, which is fed by a hydrogen-rich stream. ... Supercritical water (SCW) has many advantageous properties and is extremely reactive,(5-8) and it may allow for the performance of a catalyst-free process, because of its relevant thermophysical properties, such as a high capability to solubilize gaseous organic molecules and high reactivity, among others. ... This research is supported by the Science and Technology Ministry of Spain under Research Project ENE2009-13755, as a Project of Fundamental Research inside the framework of the National Plan of Scientific Research, Development and Technological Innovation 20082011. ...

F. J. Gutirrez Ortiz; P. Ollero; A. Serrera; S. Galera

2012-12-06T23:59:59.000Z

303

Spatial and Quantitative Approach to Incorporating Stakeholder Values into Total Maximum Daily Loads: Dominguez Channel Case Study  

SciTech Connect

The Federal Clean Water Act (CWA) Section 303(d)(1)(A) requires each state to identify those waters that are not achieving water quality standards. The result of this assessment is called the 303(d) list. The CWA also requires states to develop and implement Total Maximum Daily Loads (TMDLs) for these waters on the 303(d) list. A TMDL specifies the maximum amount of a pollutant that a water body can receive and still meet water quality standards, and allocates the pollutant loadings to point and non-point sources. Nationwide, over 34,900 segments of waterways have been listed as impaired by the Environmental Protection Agency (EPA 2006). The EPA enlists state agencies and local communities to submit TMDL plans to reduce discharges by specified dates or have them developed by the EPA. The Department of Energy requested Lawrence Livermore National Laboratory (LLNL) to develop appropriate tools to assist in improving the TMDL process. An investigation of this process by LLNL found that plans to reduce discharges were being developed based on a wide range of site investigation methods. Our investigation found that given the resources available to the interested and responsible parties, developing a quantitative stakeholder input process and using visualization tools to display quantitative information could improve the acceptability of TMDL plans. We developed a stakeholder allocation model (SAM) which uses multi-attribute utility theory to quantitatively structure the preferences of the major stakeholder groups. We then applied GIS to display allocation options in maps representing economic activity, community groups, and city agencies. This allows allocation options and stakeholder concerns to be represented in both space and time. The primary goal of this tool is to provide a quantitative and visual display of stakeholder concerns over possible TMDL options.

Stewart, J S; Baginski, T A; Greene, K G; Smith, A; Sicherman, A

2006-06-23T23:59:59.000Z

304

Potential Impact of Adopting Maximum Technologies as Minimum Efficiency Performance Standards in the U.S. Residential Sector  

SciTech Connect

The US Department of Energy (US DOE) has placed lighting and appliance standards at a very high priority of the U.S. energy policy. However, the maximum energy savings and CO2 emissions reduction achievable via minimum efficiency performance standards (MEPS) has not yet been fully characterized. The Bottom Up Energy Analysis System (BUENAS), first developed in 2007, is a global, generic, and modular tool designed to provide policy makers with estimates of potential impacts resulting from MEPS for a variety of products, at the international and/or regional level. Using the BUENAS framework, we estimated potential national energy savings and CO2 emissions mitigation in the US residential sector that would result from the most aggressive policy foreseeable: standards effective in 2014 set at the current maximum technology (Max Tech) available on the market. This represents the most likely characterization of what can be maximally achieved through MEPS in the US. The authors rely on the latest Technical Support Documents and Analytical Tools published by the U.S. Department of Energy as a source to determine appliance stock turnover and projected efficiency scenarios of what would occur in the absence of policy. In our analysis, national impacts are determined for the following end uses: lighting, television, refrigerator-freezers, central air conditioning, room air conditioning, residential furnaces, and water heating. The analyzed end uses cover approximately 65percent of site energy consumption in the residential sector (50percent of the electricity consumption and 80percent of the natural gas and LPG consumption). This paper uses this BUENAS methodology to calculate that energy savings from Max Tech for the U.S. residential sector products covered in this paper will reach an 18percent reduction in electricity demand compared to the base case and 11percent in Natural Gas and LPG consumption by 2030 The methodology results in reductions in CO2 emissions of a similar magnitude.

Letschert, Virginie; Desroches, Louis-Benoit; McNeil, Michael; Saheb, Yamina

2010-05-03T23:59:59.000Z

305

Safety and Efficacy of a Pentavalent HumanBovine (WC3) Reassortant Rotavirus Vaccine  

Science Journals Connector (OSTI)

...and safety end-point adjudication committee (listed in Part I of the Supplementary Appendix). The investigators had access to all study data. This report was drafted primarily by Drs. Vesikari, Dallas, DiNubile, and Heaton and was reviewed and approved by each coauthor. The Indian Health Service approved... In this randomized trial, the clinical efficacy of an oral, live pentavalent humanbovine reassortant vaccine was estimated to be 98.0 percent against severe gastroenteritis due to rotavirus. In the safety study, which included 68,038 infants, the rates of intussusception were similar in the vaccine and placebo groups (relative risk, 0.8; 95 percent confidence interval, 0.3 to 1.8).

Vesikari T.; Matson D.O.; Dennehy P.

2006-01-05T23:59:59.000Z

306

Efficacy of multimedia learning modules as preparation for lecture-based tutorials in electromagnetism  

E-Print Network (OSTI)

We have investigated the efficacy of online, multimedia learning modules (MLMs) as preparation for in-class, lecture-based tutorials in electromagnetism in a physics course for natural science majors (biology and marine science). Specifically, we report the results of a multiple-group pre/post-test research design comparing two groups receiving different treatments with respect to activities preceding participation in Tutorials in Introductory Physics. The different pre-tutorial activities where as follows: (1) students were assigned reading from a traditional textbook, followed by a traditional lecture; and (2) students completed online multimedia learning modules developed by the Physics Education Research Group at the University of Illinois at Urbana Champaign (UIUC), and commercially known as smartPhysics. The MLM treatment group earned significantly higher mid-term examination scores and larger gains in content knowledge as measured by the Conceptual Survey of Electricity and Magnetism (CSEM). Student at...

Moore, J Christopher

2014-01-01T23:59:59.000Z

307

Systematic review of efficacy of LIFT procedure in crpytoglandular fistula-in-ano  

Science Journals Connector (OSTI)

AbstractBackground fistula-in-ano is a common problem. Ligation of intersphincteric fistula tract (LIFT) is a new addition to the list of operations available to deal with complex fistula-in-ano. Objective we sought to qualitatively analyze studies describing LIFT for crpytoglandular fistula-in-ano and determine its efficacy. Data sources MEDLINE (Pubmed, Ovid), Embase, Scopus and Cochrane Library were searched. Study selection all clinical trials which studied LIFT or compared LIFT with other methods of treatment for anal fistulae, prospective observational studies, clinical registry data and retrospective case series which reported clinical healing of the fistula as the outcome were included. Case reports, studies reporting a combination with other technique, modified technique, abstracts, letters and comments were excluded. Intervention the intervention was ligation of intersphincteric fistula tract in crpytoglandular fistula-in-ano. Main outcome measure primary outcome measured was success rate (fistula healing rate) and length of follow-up.

Jothi Murugesan; Isabella Mor; Stephen Fulham; Kerry Hitos

2014-01-01T23:59:59.000Z

308

The Impact of Teachers' Expectations, Parents' Expectations, and Academic Self-Efficacy on the Achievement of English Language Learners  

E-Print Network (OSTI)

, and Academic Self-Efficacy on the Achievement of English Language Learners. (August 2012) Vivina Yukari Rivera, B.A., Texas A&M University Chair of Advisory Committee: Dr. Cynthia A. Riccio Given the projected increase of Hispanic Spanish... ...................................................................................................... 101 APPENDIX A ....................................................................................................... 145 APPENDIX B ........................................................................................................ 147...

Rivera, Vivina

2012-10-19T23:59:59.000Z

309

Safety and efficacy for new techniques and imaging using new equipment to support European legislation: an EU coordination action  

Science Journals Connector (OSTI)

......JAFROC) 2.0 software. A method for...ethical issues in radiation protection research...medical imaging, safety dilemmas and...special issue of Radiation Protection Dosimetry...Open-Source software that was regarded...use of ionising radiation in this field...efficacy and safety in IR, the achievements......

J. Zoetelief; K. Faulkner

2008-08-01T23:59:59.000Z

310

199USDAForestServiceGen.Tech.Rep.PSW-GTR-160.1997. Efficacy of HerbicideApplication Methods  

E-Print Network (OSTI)

version of this paper was presented at the Symposium on Oak Woodlands: Ecology,Management,andUrban199USDAForestServiceGen.Tech.Rep.PSW-GTR-160.1997. Efficacy of HerbicideApplication Methods Used tanoak (although tanoak is presently useful for fuelwood in the Santa Cruz area). Finding an effective

Standiford, Richard B.

311

The efficacy of salmon carcass analogs for enhancing stream and fish production in the Wind River watershed  

E-Print Network (OSTI)

The efficacy of salmon carcass analogs for enhancing stream and fish production in the Wind River watershed, Washington, to evaluate the effects of nutrient enhancement on measures of stream and fish production. We compared low level water chemistry, water quality, and periphyton, insect, and fish production

312

Students' self-concept and self-efficacy in the sciences: Differential relations to antecedents and educational outcomes  

Science Journals Connector (OSTI)

Abstract Self-concept and self-efficacy are two of the most important motivational predictors of educational outcomes. As most research has studied these constructs separately, little is known about their differential relations to peer ability, opportunities-to-learn in classrooms, and educational outcomes. We investigated these relations by applying (multilevel) structural equation modeling to the German PISA 2006 data set. We found a correlation of ??=?.57 between self-concept and self-efficacy in science, advocating distinguishable constructs. Furthermore, science self-concept was better predicted by the average peer achievement (Big-Fish-Little-Pond Effect), whereas science self-efficacy was more strongly affected by inquiry-based learning opportunities. There were also differences in the predictive potential for educational outcomes: Self-concept was a better predictor of future-oriented motivation to aspire a career in the sciences, whereas self-efficacy was a better predictor of current ability. The study at hand provides strong evidence for the related but distinct nature of the two constructs and extends existing research on students' competence beliefs toward social comparisons and opportunities-to-learn. Further implications for the relevance of inquiry-based classroom activities and for the assessment of competence beliefs are discussed.

Malte Jansen; Ronny Scherer; Ulrich Schroeders

2015-01-01T23:59:59.000Z

313

To quiver or to shiver: increased melanization benefits thermoregulation, but reduces warning signal efficacy in the wood tiger moth  

Science Journals Connector (OSTI)

...reduces warning signal efficacy in the wood tiger moth Robert H. Hegna 1 Ossi Nokelainen...variation in the warning signal of adult male wood tiger moths (Parasemia plantaginis...and thermoregulation [17,34]. The wood tiger moth (Parasemia plantaginis) is...

2013-01-01T23:59:59.000Z

314

Thoracic target volume delineation using various maximum-intensity projection computed tomography image sets for radiotherapy treatment planning  

SciTech Connect

Purpose: Four-dimensional computed tomography (4D-CT) is commonly used to account for respiratory motion of target volumes in radiotherapy to the thorax. From the 4D-CT acquisition, a maximum-intensity projection (MIP) image set can be created and used to help define the tumor motion envelope or the internal gross tumor volume (iGTV). The purpose of this study was to quantify the differences in automatically contoured target volumes for usage in the delivery of stereotactic body radiation therapy using MIP data sets generated from one of the four methods: (1) 4D-CT phase-binned (PB) based on retrospective phase calculations, (2) 4D-CT phase-corrected phase-binned (PC-PB) based on motion extrema, (3) 4D-CT amplitude-binned (AB), and (4) cine CT built from all available images. Methods: MIP image data sets using each of the four methods were generated for a cohort of 28 patients who had prior thoracic 4D-CT scans that exhibited lung tumor motion of at least 1 cm. Each MIP image set was automatically contoured on commercial radiation treatment planning system. Margins were added to the iGTV to observe differences in the final simulated planning target volumes (PTVs). Results: For all patients, the iGTV measured on the MIP generated from the entire cine CT data set (iGTV{sub cine}) was the largest. Expressed as a percentage of iGTV{sub cine}, 4D-CT iGTV (all sorting methods) ranged from 83.8% to 99.1%, representing differences in the absolute volume ranging from 0.02 to 4.20 cm{sup 3}; the largest average and range of 4D-CT iGTV measurements was from the PC-PB data set. Expressed as a percentage of PTV{sub cine} (expansions applied to iGTV{sub cine}), the 4D-CT PTV ranged from 87.6% to 99.6%, representing differences in the absolute volume ranging from 0.08 to 7.42 cm{sup 3}. Regions of the measured respiratory waveform corresponding to a rapid change of phase or amplitude showed an increased susceptibility to the selection of identical images for adjacent bins. Duplicate image selection was most common in the AB implementation, followed by the PC-PB method. The authors also found that the image associated with the minimum amplitude measurement did not always correlate with the image that showed maximum tumor motion extent. Conclusions: The authors identified cases in which the MIP generated from a 4D-CT sorting process under-represented the iGTV by more than 10% or up to 4.2 cm{sup 3} when compared to the iGTV{sub cine}. They suggest utilization of a MIP generated from the full cine CT data set to ensure maximum inclusive tumor extent.

Zamora, David A.; Riegel, Adam C.; Sun Xiaojun; Balter, Peter; Starkschall, George; Mawlawi, Osama; Pan Tinsu [Department of Imaging Physics, University of Texas MD Anderson Cancer Center, Houston, Texas 77030 (United States); Department of Radiation Physics, University of Texas MD Anderson Cancer Center, Houston, Texas 77030 (United States); Department of Imaging Physics, University of Texas MD Anderson Cancer Center, Houston, Texas 77030 (United States)

2010-11-15T23:59:59.000Z

315

Liquid-Liquid Transition at Tg and Stable-Glass Phase Nucleation Rate Maximum at the Kauzmann Temperature TK  

E-Print Network (OSTI)

An undercooled liquid is unstable. The driving force of the glass transition at Tg is a change of the undercooled-liquid Gibbs free energy. The classical Gibbs free energy change for a crystal formation is completed including an enthalpy saving. The crystal growth critical nucleus is used as a probe to observe the Laplace pressure change Dp accompanying the enthalpy change -Vm*Dp at Tg where Vm is the molar volume. A stable glass-liquid transition model predicts the specific heat jump of fragile liquids at temperatures smaller than Tg, the Kauzmann temperature TK where the liquid entropy excess with regard to crystal goes to zero, the equilibrium enthalpy between TK and Tg, the maximum nucleation rate at TK of superclusters containing magic atom numbers, and the equilibrium latent heats at Tg and TK. Strong-to-fragile and strong-to-strong liquid transitions at Tg are also described and all their thermodynamic parameters are determined from their specific heat jumps. The existence of fragile liquids quenched in the amorphous state, which do not undergo liquid-liquid transition during heating preceding their crystallization, is predicted. Long ageing times leading to the formation at TK of a stable glass composed of superclusters containing up to 147 atoms, touching and interpenetrating, are evaluated from nucleation rates.

Robert Felix Tournier

2014-04-10T23:59:59.000Z

316

One-dimensional delayed-detonation models of Type Ia supernovae: Confrontation to observations at bolometric maximum  

E-Print Network (OSTI)

The delayed-detonation explosion mechanism applied to a Chandrasekhar-mass white dwarf offers a very attractive model to explain the inferred characteristics of Type Ia supernovae (SNe Ia). The resulting ejecta are chemically stratified, have the same mass and roughly the same asymptotic kinetic energy, but exhibit a range in 56Ni mass. We investigate the contemporaneous photometric and spectroscopic properties of a sequence of delayed-detonation models, characterized by 56Ni masses between 0.18 and 0.81 Msun. Starting at 1d after explosion, we perform the full non-LTE, time-dependent radiative transfer with the code CMFGEN, with an accurate treatment of line blanketing, and compare our results to SNe Ia at bolometric maximum. Despite the 1D treatment, our approach delivers an excellent agreement to observations. We recover the range of SN Ia luminosities, colours, and spectral characteristics from the near-UV to 1 micron, for standard as well as low-luminosity 91bg-like SNe Ia. Our models predict an increase...

Blondin, Stphane; Hillier, D John; Khokhlov, Alexei M

2012-01-01T23:59:59.000Z

317

Maximum magnitude in bias-dependent spin accumulation signals of CoFe/MgO/Si on insulator devices  

SciTech Connect

We study in detail how the bias voltage (V{sub bias}) and interface resistance (RA) depend on the magnitude of spin accumulation signals (|?V| or |?V|/I, where I is current) as detected by three-terminal Hanle measurements in CoFe/MgO/Si on insulator (SOI) devices with various MgO layer thicknesses and SOI carrier densities. We find the apparent maximum magnitude of spin polarization as a function of V{sub bias} and the correlation between the magnitude of spin accumulation signals and the shape of differential conductance (dI/dV) curves within the framework of the standard spin diffusion model. All of the experimental results can be explained by taking into account the density of states (DOS) in CoFe under the influence of the applied V{sub bias} and the quality of MgO tunnel barrier. These results indicate that it is important to consider the DOS of the ferromagnetic materials under the influence of an applied V{sub bias} and the quality of tunnel barrier when observing large spin accumulation signals in Si.

Ishikawa, M., E-mail: mizue.ishikawa@toshiba.co.jp; Sugiyama, H.; Inokuchi, T.; Tanamoto, T.; Saito, Y. [Corporate Research and Development Center, Toshiba Corporation, 1 Komukai Toshiba-cho, Kawasaki, Kanagawa 212-8582 (Japan); Hamaya, K. [Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395 (Japan); Tezuka, N. [Department of Materials Science, Graduate School of Engineering, Tohoku University, 6-6-02 Aramaki-aza-Aoba, Sendai, Miyagi 980-8579 (Japan)

2013-12-28T23:59:59.000Z

318

Phantom and Clinical Study of Differences in Cone Beam Computed Tomographic Registration When Aligned to Maximum and Average Intensity Projection  

SciTech Connect

Purpose: To determine whether maximum or average intensity projection (MIP or AIP, respectively) reconstructed from 4-dimensional computed tomography (4DCT) is preferred for alignment to cone beam CT (CBCT) images in lung stereotactic body radiation therapy. Methods and Materials: Stationary CT and 4DCT images were acquired with a target phantom at the center of motion and moving along the superiorinferior (SI) direction, respectively. Motion profiles were asymmetrical waveforms with amplitudes of 10, 15, and 20 mm and a 4-second cycle. Stationary CBCT and dynamic CBCT images were acquired in the same manner as stationary CT and 4DCT images. Stationary CBCT was aligned to stationary CT, and the couch position was used as the baseline. Dynamic CBCT was aligned to the MIP and AIP of corresponding amplitudes. Registration error was defined as the SI deviation of the couch position from the baseline. In 16 patients with isolated lung lesions, free-breathing CBCT (FBCBCT) was registered to AIP and MIP (64 sessions in total), and the difference in couch shifts was calculated. Results: In the phantom study, registration errors were within 0.1 mm for AIP and 1.5 to 1.8 mm toward the inferior direction for MIP. In the patient study, the difference in the couch shifts (mean, range) was insignificant in the right-left (0.0 mm, ?1.0 mm) and anteriorposterior (0.0 mm, ?2.1 mm) directions. In the SI direction, however, the couch position significantly shifted in the inferior direction after MIP registration compared with after AIP registration (mean, ?0.6 mm; ranging 1.7 mm to the superior side and 3.5 mm to the inferior side, P=.02). Conclusions: AIP is recommended as the reference image for registration to FBCBCT when target alignment is performed in the presence of asymmetrical respiratory motion, whereas MIP causes systematic target positioning error.

Shirai, Kiyonori [Department of Radiation Oncology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka (Japan); Nishiyama, Kinji, E-mail: sirai-ki@mc.pref.osaka.jp [Department of Radiation Oncology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka (Japan); Katsuda, Toshizo [Department of Radiology, National Cerebral and Cardiovascular Center, Osaka (Japan); Teshima, Teruki; Ueda, Yoshihiro; Miyazaki, Masayoshi; Tsujii, Katsutomo [Department of Radiation Oncology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka (Japan)

2014-01-01T23:59:59.000Z

319

Parental reports on the efficacy of treatments and therapies for their children with autism spectrum disorders  

Science Journals Connector (OSTI)

Parents of children with autism spectrum disorders (ASD) try many and varied interventions and therapies in the hopes of improving their children's outcomes; however, empirical evidence supporting (or opposing) the vast majority of treatments is limited or nonexistent. This study examined caregiver efficacy ratings for a wide range of biological and educational/behavioral treatments commonly used for children with ASD. A web-based questionnaire regarding the development of children with ASD was distributed nationally and internationally through more than 200 autism-support organizations; results were analyzed from 479 parents (91% mothers) who reported on their children with autism, Asperger's syndrome, or PDD-NOS (M age=8.3 years, 80.2% male). Improvement whether small or dramatic was rated for 5080% of children in each of 9 drug categories, while ratings of child became worse were reported for 1520.3%. Approximately half of children were said to improve while on a special diet; 51% of those on a gluten-free and/or casein-free (GF/CF) diet were reportedly improved, while no observable effects of the GF/CF diet were indicated for about one quarter of participating children. For 10 of the 16 educational/behavioral therapies, parents reported improvement for approximately 70% of children. The most common rating was child improved somewhat followed by child improved dramatically. Results are discussed relative to the meaning of improvement in ASD and in light of both placebo effects and cost of treatments/therapies.

Robin P. Goin-Kochel; Virginia H. Mackintosh; Barbara J. Myers

2009-01-01T23:59:59.000Z

320

Liposomal encapsulation of the natural flavonoid fisetin improves bioavailability and antitumor efficacy  

Science Journals Connector (OSTI)

The natural flavonoid fisetin (3,3?,4?,7-tetrahydroxyflavone) has shown antiangiogenic and anticancer properties. Because of fisetin limited water solubility, we designed a liposomal formulation and evaluated its biological properties in vitro and in Lewis lung carcinoma (LLC) bearing mice. A liposomal formulation was developed with DOPC and DODA-PEG2000, possessing a diameter in the nanometer range (173.52.4nm), a high homogeneity (polydispersity index 0.1810.016) and high fisetin encapsulation (58%). Liposomal fisetin incubated with LLC cells were internalized, induced a typical fisetin morphological effect and increased the sub-G1 cell distribution. In vivo, liposomal fisetin allowed a 47-fold increase in relative bioavailability compared to free fisetin. The effect of liposomal fisetin on LLC tumor growth in mice at low dose (21mg/kg) allowed a higher tumor growth delay (3.3 days) compared to free fisetin at the same dose (1.6 day). Optimization of liposomal fisetin therapy was attempted by co-treatment with cyclophosphamide which led to a significant improvement in tumor growth delay (7.2 days) compared to cyclophosphamide with control liposomes (4.2 days). In conclusion, fisetin liposomes markedly improved fisetin bioavailability and anticancer efficacy in mice and this formulation could facilitate the administration of this flavonoid in the clinical setting.

Johanne Seguin; Laura Brull; Renaud Boyer; Yen Mei Lu; Miriam Ramos Romano; Yasmine S. Touil; Daniel Scherman; Michel Bessodes; Nathalie Mignet; Guy G. Chabot

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Antivenom for snakebite envenoming in Sri Lanka: The need for geographically specific antivenom and improved efficacy  

Science Journals Connector (OSTI)

Sri Lanka is a tropical developing island nation that endures significant economic and medical burden as a result of snakebite envenomation, having not only a high prevalence of envenomations, but also one of the highest incidence rates (200 snakebites/100,000people/year) of venomous snakebite in the world (Kasturiratne etal., 2005). Ironically, the very snakes responsible for this human morbidity and mortality are a valuable biomedical and ecological national resource, despite the medical and economic consequences of envenomation. Currently, no snake antivenom is produced using venoms from native Sri Lankan snakes as immunogens, and there is a true need for an efficacious Sri Lanka, poly-specific snake antivenom. An approach to fulfilling this need via combining the scientific, technological and economical resources from Costa Rica and the United States with the knowledge and talent of Sri Lankan official governmental agencies, legal counsels, environmental, medical and veterinary academic institutions, and religious and cultural leaders has been initiated, coordinated and funded by Animal Venom Research International (AVRI), a nonprofit charity. This bridging of nations and the cooperative pooling of their resources represents a potential avenue for antivenom development in a developing country that suffers the consequences of few specific resources for the medical management of venomous snakebite. The desired final outcome of such an endeavor for Sri Lanka is, most importantly, improved medical outcomes for snakebite patients, with enhanced and expanded science and technology relating to snake venoms and antivenoms, and the collateral benefits of reduced economic cost for the country.

D.E. Keyler; I. Gawarammana; J.M. Gutirrez; K.H. Sellahewa; K. McWhorter; R. Malleappah

2013-01-01T23:59:59.000Z

322

Efficacy of selected probiotic cultures to inhibit Enterobacter sakazakii ATCC 12868 in model reconstituted dairy products  

Science Journals Connector (OSTI)

Enterobacter sakazakii ATCC 12868 (ES) is a very dangerous opportunistic organism likely to contaminate post-pasteurised dry milk products with a high mortality rate (40-80%). This study evaluated the antimicrobial efficacy of probiotics against ES in reconstituted dried infant formula. Initial study at 30C showed that Enterococcus faecium M-74 (EF) to exhibit the strongest inhibition when compared with Lactobacillus acidophilus 74-2 (LA) and Pediococcus acidilacticii (PA). In later study, initial populations of ES and EF were ~10 CFU/ml and 109 CFU/ml in infant formula, respectively. At 12h, ES in controls at 30 and 35C increased to 6.54 and 7.95 log10 CFU/ml, respectively. At 12 hours, ES in formula (30C) with EF decreased to 0.52 log10 CFU/ml and was undetected (< 1.0 CFU/ml) at 35C. EF rapidly reduce the pH of the infant formula below pH 5.0 in the first four hours of fermentation at 35C, more than at 30C. The inhibitory effect of EF may be due to the acidification of the formula.

Makuba A. Lihono; Aubrey F. Mendonca; Bledar Bisha; La Tanya Bankston; Terri D. Boylston

2011-01-01T23:59:59.000Z

323

Dental radiography: efficacy in the assessment of intraosseous lesions of the face and jaws in asymptomatic patients  

SciTech Connect

In this investigation the efficacy of dental radiography for the detection of occult intraosseous lesions of the face and jaws was evaluated. An analysis of 30 million health insurance records indicated that the period prevalence of malignant lesions was less than 5 cases/million/year, and for benign lesions approximately 100 cases/million/year. Data from a controlled observer-performance study showed that radiographic sensitivities ranged between 50% and 80%. The cost per true-positive finding was estimated to be +8.6 million per malignant case and +430,000 per benign case. An assessment of the dosimetric literature indicated that the benefits of radiographic screening as a means for early detection of a malignancy appear to be counterbalanced by the risk of causing a radiation-induced malignancy. Taken together, these data demonstrate that dental radiography is not efficacious for the purpose of detecting occult lesions.

Zeichner, S.J.; Ruttimann, U.E.; Webber, R.L.

1987-03-01T23:59:59.000Z

324

Dosimetric comparison of treatment plans based on free breathing, maximum, and average intensity projection CTs for lung cancer SBRT  

SciTech Connect

Purpose: To determine whether there is a CT dataset may be more favorable for planning and dose calculation by comparing dosimetric characteristics between treatment plans calculated using free breathing (FB), maximum and average intensity projection (MIP and AIP, respectively) CTs for lung cancer patients receiving stereotactic body radiation therapy (SBRT). Methods: Twenty lung cancer SBRT patients, treated on a linac with 2.5 mm width multileaf-collimator (MLC), were analyzed retrospectively. Both FB helical and four-dimensional CT scans were acquired for each patient. Internal target volume (ITV) was delineated based on MIP CTs and modified based on both ten-phase datasets and FB CTs. Planning target volume (PTV) was then determined by adding additional setup margin to ITV. The PTVs and beams in the optimized treatment plan based on FB CTs were copied to MIP and AIP CTs, with the same isocenters, MLC patterns and monitor units. Mean effective depth (MED) of beams, and some dosimetric parameters for both PTVs and most important organ at risk (OAR), lung minus PTV, were compared between any two datasets using two-tail paired t test. Results: The MEDs in FB and AIP plans were similar but significantly smaller (Ps < 0.001) than that in MIP plans. Minimum dose, mean dose, dose covering at least 90% and 95% of PTVs in MIP plans were slightly higher than two other plans (Ps < 0.008). The absolute volume of lung minus PTV receiving greater than 5, 10, and 20 Gy in MIP plans were significantly smaller than those in both FB and AIP plans (Ps < 0.008). Conformity index for FB plans showed a small but statistically significantly higher. Conclusions: Dosimetric characteristics of AIP plans are similar to those of FB plans. Slightly better target volume coverage and significantly lower low-dose region ({<=}30 Gy) in lung was observed in MIP plans. The decrease in low-dose region in lung was mainly caused by the change of lung volume contoured on two datasets rather than the differences of dose distribution between AIP and MIP plans. Compare with AIP datasets, FB datasets were more prone to significant image artifacts and MIP datasets may overestimate or underestimate the target volume when the target is closer to the denser tissue, so AIP seems favorable for planning and dose calculation for lung SBRT.

Tian Yuan; Wang Zhiheng; Ge Hong; Zhang Tian; Cai Jing; Kelsey, Christopher; Yoo, David; Yin Fangfang [Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina 27710 (United States) and Department of Radiation Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Science, Beijing 100021 (China); Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina 27710 (United States); Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina 27710 and Department of Radiation Oncology, Henan Cancer Hospital, Zhengzhou, Henan 450008 (China); Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina 27710 (United States)

2012-05-15T23:59:59.000Z

325

Maternal feeding self-efficacy and fruit and vegetable intakes in infants. Results from the SAIDI study  

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Abstract Adequate consumption of fruits and vegetables (FV) is a characteristic of a healthy diet but remains a challenge in nutrition interventions. This cross-sectional study explored the multi-directional relationships between maternal feeding self-efficacy, parenting confidence, child feeding behaviour, exposure to new food and FV intake in a cohort of 277 infants. Mothers with healthy infants weighing ?2500?g and ?37?weeks gestation were recruited post-natally from 11 South Australian hospitals. Socio-demographic data were collected at recruitment. At 6?months postnatal, infants were weighed and measured, and mothers completed a questionnaire exploring their perceptions of child feeding behaviour and child exposure to new foods. The questionnaire also included the Short Temperament Scale for Infants, Kessler 10 to measure maternal psychological distress and 5 items measuring maternal feeding self-efficacy. The number of occasions and variety of FV (number of subgroups within food groups) consumed by infants were estimated from a 24-hour dietary recall and 2?days food record. Structural equation modelling was performed using Mplus version 6.11. Median (IQR) variety scores were 2 (13) for fruit and 3 (25) for vegetable intake. The most popular FV consumed were apple (n?=?108, 45.0%) and pumpkin (n?=?143, 56.3%). None of the variables studied predicted the variety of child fruit intake. Parenting confidence, exposure to new foods and child feeding behaviour were indirectly related to child vegetable intake through maternal feeding self-efficacy while total number of children negatively predicted child vegetable variety (p?efficacy and the family eating environment as key strategies towards development of healthy eating in children.

Gloria A. Koh; Jane A. Scott; Richard J. Woodman; Susan W. Kim; Lynne A. Daniels; Anthea M. Magarey

2014-01-01T23:59:59.000Z

326

The use of a prodrug approach to minimize potential CNS exposure of next generation quinoline methanols while maintaining efficacy in in vivo animal models  

Science Journals Connector (OSTI)

The use of mefloquine (MQ) for antimalarial treatment and prophylaxis has diminished largely in response to concerns about its neurologic side effects. An analog campaign designed to maintain the efficacy of M...

Jason C. Sousa; Erin Milner; Dustin Carroll

2014-12-01T23:59:59.000Z

327

ANG4043, a Novel Brain-Penetrant PeptidemAb Conjugate, Is Efficacious against HER2-Positive Intracranial Tumors in Mice  

Science Journals Connector (OSTI)

...author-choice ANG4043, a Novel Brain-Penetrant Peptide-mAb Conjugate, Is Efficacious...breast cancer, but they are ineffective against brain metastases due to poor brain penetration. In previous studies, we identified...

Anthony Regina; Michel Demeule; Sasmita Tripathy; Simon Lord-Dufour; Jean-Christophe Currie; Mustapha Iddir; Borhane Annabi; Jean-Paul Castaigne; Jean E. Lachowicz

328

An Empirical Comparison between the NEO-FFI and the WPI and the Relationship between Self-Efficacy and Workplace Personality  

E-Print Network (OSTI)

satisfaction, with self-esteem and generalized self-efficacy contributing the most. Judge and Bono (2001) point out that Conscientiousness is often thought of as the ?primary dispositional predictor of job performance? (p. 85). They were able to show...

Orozco, Lauren Michel

2011-02-22T23:59:59.000Z

329

Safety and efficacy of carotid angioplasty and stenting for radiation-associated carotid artery stenosis  

Science Journals Connector (OSTI)

Introduction Prior neck irradiation may induce atherosclerosis in the carotid artery and is considered an indication for carotid angioplasty and stenting (CAS). This study sought to evaluate the effect of neck radiation therapy (XRT) on the rate of restenosis and embolic potential in patients undergoing CAS. Methods Two hundred ten CAS procedures were performed on 193 patients (XRT [N = 28], non-XRT [N = 182]). Mean follow-up was 347 339 days (median, 305 days; range, 16-1354 days). Duplex velocity criteria for restenosis after CAS were: >50% restenosis (peak systolic velocity [PSV] > 125 cm/sec, end diastolic velocity [EDV] 40-99 cm/sec, and internal carotid artery to common carotid artery systolic ratio [ICA/CCA] > 2.0); >70% restenosis (PSV>230 cm/sec, EDV>100 cm/sec, and ICA/CCA ratio >4.0). Restenosis >70% was confirmed by digital subtraction angiography. Additional endpoints included groin hematoma, groin pseudoaneurysm, myocardial infarction, stroke, mortality, and the combined myocardial infarction/stroke/mortality rate. Captured particulate data was obtained from microporous filters used during CAS. Nineteen XRT and 128 non-XRT consecutive filters were analyzed. Photomicroscopy was performed along three axes for each filter, and the quantity and size of the captured particles were analyzed using video image analysis software. Results There were more men (XRT: 85.7% vs. non-XRT: 52.8%, P 1000 ?m (XRT: 47.4% vs. non-XRT: 30.5%, P = NS). Conclusions This study suggests that the durability of CAS and the characteristics of captured embolic particles are not altered by a history of neck XRT. This supports the safety and efficacy of CAS for the treatment of patients with a history of neck XRT. Prior neck XRT may predispose the patient to the de novo development of stenoses at locations that were not previously treated.

Mikel Sadek; Neal S. Cayne; Hyun J. Shin; Irene C. Turnbull; Michael L. Marin; Peter L. Faries

2009-01-01T23:59:59.000Z

330

Safety and Efficacy of Bevacizumab With Hypofractionated Stereotactic Irradiation for Recurrent Malignant Gliomas  

SciTech Connect

Purpose: Preclinical studies suggest that inhibition of vascular endothelial growth factor (VEGF) improves glioma response to radiotherapy. Bevacizumab, a monoclonal antibody against VEGF, has shown promise in recurrent gliomas, but the safety and efficacy of concurrent bevacizumab with brain irradiation has not been extensively studied. The objectives of this study were to determine the safety and activity of this combination in malignant gliomas. Methods and Materials: After prior treatment with standard radiation therapy patients with recurrent glioblastoma (GBM) and anaplastic gliomas (AG) received bevacizumab (10 mg/kg intravenous) every 2 weeks of 28-day cycles until tumor progression. Patients also received 30 Gy of hypofractionated stereotactic radiotherapy (HFSRT) in five fractions after the first cycle of bevacizumab. Results: Twenty-five patients (20 GBM, 5 AG; median age 56 years; median Karnofsky Performance Status 90) received a median of seven cycles of bevacizumab. One patient did not undergo HFSRT because overlap with prior radiotherapy would exceed the safe dose allowed to the optic chiasm. Three patients discontinued treatment because of Grade 3 central nervous system intratumoral hemorrhage, wound dehiscence, and bowel perforation. Other nonhematologic and hematologic toxicities were transient. No radiation necrosis was seen in these previously irradiated patients. For the GBM cohort, overall response rate was 50%, 6-month progression-free survival was 65%; median overall survival was 12.5 months, and 1-year survival was 54%. Discussion: Bevacizumab with HFSRT is safe and well tolerated. Radiographic responses, duration of disease control, and survival suggest that this regimen is active in recurrent malignant glioma.

Gutin, Philip H. [Brain Tumor Center, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Department of Neurosurgery, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Department of Neurological Surgery, Weill Medical College of Cornell University, New York, New York (United States)], E-mail: gutinp@mskcc.org; Iwamoto, Fabio M. [Brain Tumor Center, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Department of Neurology, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Beal, Kathryn [Brain Tumor Center, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Mohile, Nimish A. [Department of Neurology, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Karimi, Sasan [Brain Tumor Center, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Hou, Bob L. [Brain Tumor Center, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Lymberis, Stella [Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Yamada, Yoshiya [Brain Tumor Center, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Chang, Jenghwa [Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, New York (United States)] (and others)

2009-09-01T23:59:59.000Z

331

The Efficacy of Ultraviolet Radiation for Sterilizing Tools Used for Surgically Implanting Transmitters into Fish  

SciTech Connect

Telemetry is frequently used to examine the behavior of fish, and the transmitters used are normally surgically implanted into the coelom of fish. Implantation requires the use of surgical tools such as scalpels, forceps, needle holders, and sutures. When several fish are implanted consecutively for large telemetry studies, it is common for surgical tools to be sterilized or, at minimum, disinfected between each use so that pathogens that may be present are not spread among fish. However, autoclaving tools can take a long period of time, and chemical sterilants or disinfectants can be harmful to both humans and fish and have varied effectiveness. Ultraviolet (UV) radiation is commonly used to disinfect water in aquaculture facilities. However, this technology has not been widely used to sterilize tools for surgical implantation of transmitters in fish. To determine its efficacy for this application, Pacific Northwest National Laboratory researchers used UV radiation to disinfect surgical tools (i.e., forceps, needle holder, stab scalpel, and suture) that were exposed to one of four aquatic organisms that typically lead to negative health issues for salmonids. These organisms included Aeromonas salmonicida, Flavobacterium psychrophilum, Renibacterium salmoninarum, and Saprolegnia parasitica. Surgical tools were exposed to the bacteria by dipping them into a confluent suspension of three varying concentrations (i.e., low, medium, high). After exposure to the bacterial culture, tools were placed into a mobile Millipore UV sterilization apparatus. The tools were then exposed for three different time periods2, 5, or 15 min. S. parasitica, a water mold, was tested using an agar plate method and forceps-pinch method. UV light exposures of 5 and 15 min were effective at killing all four organisms. UV light was also effective at killing Geobacillus stearothermophilus, the organism used as a biological indicator to verify effectiveness of steam sterilizers. These techniques appear to provide a quick alternative disinfection technique for some surgical tools that is less harmful to both humans and fish while not producing chemical waste. However, we do not recommend using these methods with tools that have overlapping parts or other structures that cannot be directly exposed to UV light such as needle holders.

Walker, Ricardo W.; Markillie, Lye Meng; Colotelo, Alison HA; Gay, Marybeth E.; Woodley, Christa M.; Brown, Richard S.

2013-02-28T23:59:59.000Z

332

Single-particle spectral density of the unitary Fermi gas: Novel approach based on the operator product expansion, sum rules and the maximum entropy method  

E-Print Network (OSTI)

Making use of the operator product expansion, we derive a general class of sum rules for the imaginary part of the single-particle self-energy of the unitary Fermi gas. The sum rules are analyzed numerically with the help of the maximum entropy method, which allows us to extract the single-particle spectral density as a function of both energy and momentum. These spectral densities contain basic information on the properties of the unitary Fermi gas, such as the dispersion relation and the superfluid pairing gap, for which we obtain reasonable agreement with the available results based on quantum Monte-Carlo simulations.

Gubler, Philipp; Hatsuda, Tetsuo; Nishida, Yusuke

2015-01-01T23:59:59.000Z

333

We study the continuous extractive distillation of minimum and maximum boiling azeotropic mixtures A-B with a heavy or a light entrainer E, intending to assess its feasibility based on thermodynamic insights.  

E-Print Network (OSTI)

#12;#12;Abstract We study the continuous extractive distillation of minimum and maximum boiling on operating parameters: distillate product purity and recovery, reflux ratio R and entrainer ­ feed flow rate. For the 1.0-2 class both A and B can be distillated. For one of them there exists a maximum entrainer - feed

Mailhes, Corinne

334

Novel fuzzy logic based sensorless maximum power point tracking strategy for wind turbine systems driven DFIG (doubly-fed induction generator)  

Science Journals Connector (OSTI)

Abstract This paper presents a novel FLC MPPT (fuzzy logic sensorless maximum power point tracking) method for WECS (wind energy conversion systems). The proposed method greatly reduces the speed variation range of the wind generator which leads to the downsizing the PWM (pulse width modulation) back-to-back converters by approximately 40% in comparison with conventional techniques. The method also increases the system's reliability by reducing the converter losses. Firstly, a MRAS (model reference adaptive system) based on fuzzy logic technique is used to estimate the DFIG (doubly-fed induction generator) rotor's speed. Then, a FLC MPPT (Fuzzy Logic Maximum Power Point Tracking) method is applied to provide the reference electromagnetic torque. Subsequently, in order to achieve the overall sensorless MPPT technique, the wind power is approximated from estimated generator speed and the reference of electromagnetic torque. Finally, the wind speed is estimated from the mechanical power using a fuzzy logic technique. The proposed control method has been applied to a WTG (wind turbine generator) driving a 3.7kW DFIG in variable speed mode. In order to validate the simulation results, experimental tests have been performed on a 3.7kW test bench, consisting of a DFIG and DC motor drive.

K. Belmokhtar; M.L. Doumbia; K. Agbossou

2014-01-01T23:59:59.000Z

335

Simultaneous use of MRM (maximum rectangle method) and optimization methods in determining nominal capacity of gas engines in CCHP (combined cooling, heating and power) systems  

Science Journals Connector (OSTI)

Abstract Energy, economic, and environmental analyses of combined cooling, heating and power (CCHP) systems were performed here to select the nominal capacities of gas engines by combination of optimization algorithm and maximum rectangle method (MRM). The analysis was performed for both priority of providing electricity (PE) and priority of providing heat (PH) operation strategies. Four scenarios (SELL-PE, SELL-PH, No SELL-PE, No SELL-PH) were followed to specify design parameters such as the number and nominal power of prime movers, heating capacities of both backup boiler and energy storage tank, and the cooling capacities of electrical and absorption chillers. By defining an objective function called the Relative Annual Benefit (RAB), Genetic Algorithm optimization method was used for finding the optimal values of design parameters. The optimization results indicated that two gas engines (with nominal powers of 3780 and 3930kW) in SELL-PE scenario, two gas engines (with nominal powers of 5290 and 5300kW) in SELL-PH scenario, one gas engine (with nominal power of 2440kW) in No SELL-PE scenario provided the maximum value of the objective function. Furthermore in No SELL-PE scenario (which had the lowest RAB value in comparison with that for the above mentioned scenarios), thermal energy storage was not required. Due to very low value of RAB, any gas engine in No SELL-PH scenario was not recommended.

Sepehr Sanaye; Navid Khakpaay

2014-01-01T23:59:59.000Z

336

Complementary and Alternative Medicine in Autism: An Evidence-Based Approach to Negotiating Safe and Efficacious Interventions with Families  

Science Journals Connector (OSTI)

Summary This review focuses on helping clinicians identify resources and develop strategies they may use to effectively negotiate safe and effective use of complementary and alternative medicine (CAM) treatments with families of children with autism spectrum disorders (ASD), as well as other neurodevelopmental disorders. Since new types of CAM continue to be introduced into the autism community, emphasis is placed on providing clinicians with tools to help families negotiate the myriad of available treatments and make decisions based on current safety and efficacy data, while remaining mindful of the reasons families may be considering these treatments. We familiarize readers with high-quality, evidence-based resources that providers and families may use to ascertain current information about specific types of CAM, verify the content of biologically-based treatments, identify ongoing CAM research and obtain toolkits designed to help healthcare providers raise the topic of CAM usage and facilitate disclosure and discussion of CAM use with patients and their families.

R. Scott Akins; Kathy Angkustsiri; Robin L. Hansen

2010-01-01T23:59:59.000Z

337

A review of age-old antimalarial drug to combat malaria: efficacy up-gradation by nanotechnology based drug delivery  

Science Journals Connector (OSTI)

Abstract Malaria is uncontrolled burden in the world till now. Despite of different efforts to develop antimalarial drug for decades, any anti-malarial drug can able to eradicate completely till now. Many anti-malarial substances are practically ineffectual because of their physicochemical limitations, cytotoxicity, chemical instability and degradation, and limited activities against intracellular parasites. Taking into consideration, the amount of research is going to conduct in the field of nanoparticle based drug delivery systems, lead to new ways of improving the treatment of infectious diseases. The study has focused on the progress and advancement of research on nanotechnology based drug delivery to eradicate the malaria. We like to focus the efficacy of nanotechnology based drug application for the opening out of novel chemotherapeutics in laboratory research, which may show the way to better use with age-old antimalarial drug and may draw the attention of pharmaceutical industries for the improvement and designing of effective anti-malarial drugs in future.

Satyajit Tripathy; Somenath Roy

2014-01-01T23:59:59.000Z

338

Hardness of Maximum Constraint Satisfaction  

E-Print Network (OSTI)

1.4 Non-boolean Max-k-CSP . . . . . .Techniques 3 Preliminaries 4 Max-CSP given by a predicate 5Results for Every CSP?. In Symposium on Theory of

Chan, Siu On

2013-01-01T23:59:59.000Z

339

The Atacama Surface Solar Maximum  

Science Journals Connector (OSTI)

Solar radiation reaching the earth's surface is one of the major drivers of climate dynamics. By setting the surface energy balance, downwelling solar radiation indirectly heats the atmosphere and controls the hydrological cycle. Besides its critical ...

Roberto Rondanelli; Alejandra Molina; Mark Falvey

340

Maximum Principles in Analytical Economics  

Science Journals Connector (OSTI)

...what he is saying is that the sci-entist who formulates laws of observed empirical phenomena is essentially an economist or economizer. Nonetheless, I must point out that these distinct roles are, almost by coin-cidence so to speak, closely related...

Paul A. Samuelson

1971-09-10T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Ultrasonic Maximum Aperture Saft Imaging  

Science Journals Connector (OSTI)

The focused transducer combined with C-scan imaging is currently the workhorse of ultrasonic nondestructive evaluation (NDE) [1]. Its strength lies in its simplicity and high quality images. There is room for imp...

P. J. Howard; R. Y. Chiao

1995-01-01T23:59:59.000Z

342

Abstract 4479: Influence of the blood-brain barrier on drug distribution and efficacy of PI3K/mTOR inhibitors  

Science Journals Connector (OSTI)

...Abstract 4479: Influence of the blood-brain barrier on drug distribution and efficacy...is influenced by the presence of blood-brain barrier (BBB). PI3K/mTOR/AKT is...with the former molecule optimized for brain delivery. Here the influence of the BBB...

Rajneet K. Oberoi; William F. Elmquist; Rajendar Mittapalli; Jenny Pokorny; Jann Sarkaria

2014-10-01T23:59:59.000Z

343

The Impact of Fish Oil on the Chemopreventive Efficacy of Tamoxifen against Development of N-Methyl-N-NitrosoureaInduced Rat Mammary Carcinogenesis  

Science Journals Connector (OSTI)

...research-article Research Articles The Impact of Fish Oil on the Chemopreventive Efficacy of Tamoxifen...first time that the combination of a fish oil diet rich in n-3 PUFA and tamoxifen seemed...322-30 breast cancer prevention|fish oil|omega-3 fatty acids|Tamoxifen| Introduction...

Andrea Manni; Haifang Xu; Sharlene Washington; Cesar Aliaga; Timothy Cooper; John P. Richie, Jr.; Richard Bruggeman; Bogdan Prokopczyk; Ana Calcagnotto; Neil Trushin; David Mauger; Michael F. Verderame; Karam El-Bayoumy

2010-03-01T23:59:59.000Z

344

Accident analysis of railway transportation of low-level radioactive and hazardous chemical wastes: Application of the /open quotes/Maximum Credible Accident/close quotes/ concept  

SciTech Connect

The maximum credible accident (MCA) approach to accident analysis places an upper bound on the potential adverse effects of a proposed action by using conservative but simplifying assumptions. It is often used when data are lacking to support a more realistic scenario or when MCA calculations result in acceptable consequences. The MCA approach can also be combined with realistic scenarios to assess potential adverse effects. This report presents a guide for the preparation of transportation accident analyses based on the use of the MCA concept. Rail transportation of contaminated wastes is used as an example. The example is the analysis of the environmental impact of the potential derailment of a train transporting a large shipment of wastes. The shipment is assumed to be contaminated with polychlorinated biphenyls and low-level radioactivities of uranium and technetium. The train is assumed to plunge into a river used as a source of drinking water. The conclusions from the example accident analysis are based on the calculation of the number of foreseeable premature cancer deaths the might result as a consequence of this accident. These calculations are presented, and the reference material forming the basis for all assumptions and calculations is also provided.

Ricci, E.; McLean, R.B.

1988-09-01T23:59:59.000Z

345

Energy efficiency and color quality limits in artificial light sources emulating natural illumination  

Science Journals Connector (OSTI)

We present in this work a calculation of the theoretical limits attainable for natural light emulation with regard to the joint optimization of the Luminous Efficacy of Radiation and...

Hertog, Wim; Llenas, Aleix; Quintero, Jess M; Hunt, Charles E; Carreras, Josep

2014-01-01T23:59:59.000Z

346

A Phase II Study of the Efficacy and Safety of the Combination Therapy of the MEK Inhibitor Refametinib (BAY 86-9766) Plus Sorafenib for Asian Patients with Unresectable Hepatocellular Carcinoma  

Science Journals Connector (OSTI)

...400 mg (evening), with dose escalation to sorafenib 400 mg twice daily from cycle...control rate. Secondary endpoints: time to progression, overall survival, pharmacokinetic...efficacy analysis; n = 58). Median time to progression was 122 days, median overall...

Ho Yeong Lim; Jeong Heo; Hye Jin Choi; Cheng-Yao Lin; Jung-Hwan Yoon; Chiun Hsu; Kun-Ming Rau; Ronnie T.P. Poon; Winnie Yeo; Joong-Won Park; Miah Hiang Tay; Wen-Son Hsieh; Christian Kappeler; Prabhu Rajagopalan; Heiko Krissel; Michael Jeffers; Chia-Jui Yen; Won Young Tak

2014-12-01T23:59:59.000Z

347

Computed Tomography-Guided High-Dose-Rate Brachytherapy in Hepatocellular Carcinoma: Safety, Efficacy, and Effect on Survival  

SciTech Connect

Purpose: To determine the saftety and efficacy of computed tomography (CT)-guided brachytherapy in hepatocellular carcinoma (HCC). Methods and Materials: A total of 83 patients were recruited, presenting with 140 HCC- lesions. Treatment was performed by CT-guided high-dose-rate (HDR) brachytherapy with an iridium-192 source. The primary endpoint was time to progression; secondary endpoints included local tumor control and overall survival (OS). A matched-pair analysis with patients not receiving brachytherapy was performed. Match criteria included the Cancer of the Liver Italian Program (CLIP) score, alpha-fetoprotein, presence, and extent of multifocal disease. For statistical analysis, Kaplan-Meier and Cox regression were performed. Results: Mean and median cumulative TTP for all patients (n = 75) were 17.7 and 10.4 months. Five local recurrences were observed. The OS after inclusion reached median times of 19.4 months (all patients), 46.3 months (CLIP score, 0), 20.6 months (CLIP score, 1) 12.7 months, (CLIP score, 2), and 8.3 months (CLIP score, {>=}3). The 1- and 3-year OS were 94% and 65% (CLIP score, 0), 69% and 12% (CLIP score, 1), and 48% and 19% (CLIP score, 2), respectively. Nine complications requiring intervention were encountered in 124 interventions. Matched-pair analysis revealed a significantly longer OS for patients undergoing CT-guided brachytherapy. Conclusion: Based on our results the study treatment could be safely performed. The study treatment had a beneficial effect on OS in patients with advanced HCC, with respect to (and depending on) the CLIP score and compared with OS in a historical control group. A high rate of local control was also observed, regardless of applied dose in a range of 15 to 25 Gy.

Mohnike, Konrad; Wieners, Gero; Schwartz, Franziska; Seidensticker, Max; Pech, Maciej; Ruehl, Ricarda [Klinik fuer Radiologie und Nuklearmedizin, Otto von Guericke University, Magdeburg (Germany); Wust, Peter [Klinik fuer Strahlentherapie, Charite Universitaetsmedizin, Berlin (Germany); Lopez-Haenninen, Enrique [Klinik fuer Radiologie und Nuklearmedizin, Martin-Luther-Krankenhaus, Berlin (Germany); Gademann, Guenther; Peters, Nils [Klinik fuer Strahlentherapie, Otto von Guericke University, Magdeburg (Germany); Berg, Thomas [Medizinische Klinik mit Schwerpunkt Hepato-Gastroenterologie, Charite Universitaetsmedizin, Berlin (Germany); Malfertheiner, Peter [Klinik fuer Gastroenterologie und Hepatologie, Otto von Guericke University, Magdeburg (Germany); Ricke, Jens, E-mail: ricke@med.ovgu.d [Klinik fuer Radiologie und Nuklearmedizin, Otto von Guericke University, Magdeburg (Germany)

2010-09-01T23:59:59.000Z

348

Efficacy of an integrated continuing medical education (CME) and quality improvement (QI) program on radiation oncologist (RO) clinical practice  

SciTech Connect

Purpose: There has been little radiation oncologist (RO)-specific research in continuing medical education (CME) or quality improvement (QI) program efficacy. Our aim was to evaluate a CME/QI program for changes in RO behavior, performance, and adherence to department protocols/studies over the first 12 months of the program. Methods and Materials: The CME/QI program combined chart audit with feedback (C-AWF), simulation review AWF (SR-AWF), reminder checklists, and targeted CME tutorials. Between April 2003 and March 2004, management of 75 patients was evaluated by chart audit with feedback (C-AWF) and 178 patients via simulation review audit (SR-AWF) using a validated instrument. Scores were presented, and case management was discussed with individualized educational feedback. RO behavior and performance was compared over the first year of the program. Results: Comparing the first and second 6 months, there was a significant improvement in mean behavior (12.7-13.6 of 14, p = 0.0005) and RO performance (7.6-7.9 of 8, p = 0.018) scores. Protocol/study adherence significantly improved from 90.3% to 96.6% (p = 0.005). A total of 50 actions were generated, including the identification of learning needs to direct CME tutorials, the systematic change of suboptimal RO practice, and the alteration of deficient management of 3% of patients audited during the program. Conclusion: An integrated CME/QI program combining C-AWF, SR-AWF, QI reminders, and targeted CME tutorials effectively improved targeted RO behavior and performance over a 12-month period. There was a corresponding increase in departmental protocol and study adherence.

Leong, Cheng Nang [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore) and Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore)]. E-mail: Cheng_Nang_Leong@mail.nhg.com.sg; Shakespeare, Thomas Philip [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); North Coast Cancer Institute, Coffs Harbour (Australia); Mukherjee, Rahul K. [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Back, Michael F. [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Lee, Khai Mun [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Lu, Jiade Jay [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Wynne, Christopher J. [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Lim, Keith [Department of Radiation Oncology, The Cancer Institute, National University Hospital (Singapore); Tang, Johann [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Zhang Xiaojian [Department of Radiation Oncology, Cancer Hospital, Fudan Hospital, Shanghai (China)

2006-12-01T23:59:59.000Z

349

SDSS J2222+2745: A GRAVITATIONALLY LENSED SEXTUPLE QUASAR WITH A MAXIMUM IMAGE SEPARATION OF 15.''1 DISCOVERED IN THE SLOAN GIANT ARCS SURVEY  

SciTech Connect

We report the discovery of a unique gravitational lens system, SDSS J2222+2745, producing five spectroscopically confirmed images of a z{sub s} = 2.82 quasar lensed by a foreground galaxy cluster at z{sub l} = 0.49. We also present photometric and spectroscopic evidence for a sixth lensed image of the same quasar. The maximum separation between the quasar images is 15.''1. Both the large image separations and the high image multiplicity are in themselves rare among known lensed quasars, and observing the combination of these two factors is an exceptionally unlikely occurrence in present data sets. This is only the third known case of a quasar lensed by a cluster, and the only one with six images. The lens system was discovered in the course of the Sloan Giant Arcs Survey, in which we identify candidate lenses in the Sloan Digital Sky Survey and target these for follow-up and verification with the 2.56 m Nordic Optical Telescope. Multi-band photometry obtained over multiple epochs from 2011 September to 2012 September reveals significant variability at the {approx}10%-30% level in some of the quasar images, indicating that measurements of the relative time delay between quasar images will be feasible. In this lens system, we also identify a bright (g = 21.5) giant arc corresponding to a strongly lensed background galaxy at z{sub s} = 2.30. We fit parametric models of the lens system, constrained by the redshift and positions of the quasar images and the redshift and position of the giant arc. The predicted time delays between different pairs of quasar images range from {approx}100 days to {approx}6 yr.

Dahle, H.; Groeneboom, N. [Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029, Blindern, NO-0315 Oslo (Norway); Gladders, M. D.; Abramson, L. E. [Department of Astronomy and Astrophysics, The University of Chicago, 5640 S. Ellis Avenue, Chicago, IL 60637 (United States); Sharon, K. [Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 48109 (United States); Bayliss, M. B. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Wuyts, E. [Max-Planck-Institut fuer extraterrestrische Physik, Giessenbackstrasse 1, D-85748 Garching bei Muenchen (Germany); Koester, B. P. [Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI 48109 (United States); Brinckmann, T. E.; Kristensen, M. T.; Lindholmer, M. O.; Nielsen, A.; Krogager, J.-K.; Fynbo, J. P. U., E-mail: hdahle@astro.uio.no [Dark Cosmology Centre, Niels Bohr Institute, Juliane Maries Vej 30, DK-2100 Copenhagen O (Denmark)

2013-08-20T23:59:59.000Z

350

Maximum Entropy Method and Charge Flipping, a Powerful Combination to Visualize the True Nature of Structural Disorder from in situ X-ray Powder Diffraction Data  

SciTech Connect

In a systematic approach, the ability of the Maximum Entropy Method (MEM) to reconstruct the most probable electron density of highly disordered crystal structures from X-ray powder diffraction data was evaluated. As a case study, the ambient temperature crystal structures of disordered {alpha}-Rb{sub 2}[C{sub 2}O{sub 4}] and {alpha}-Rb{sub 2}[CO{sub 3}] and ordered {delta}-K{sub 2}[C{sub 2}O{sub 4}] were investigated in detail with the aim of revealing the 'true' nature of the apparent disorder. Different combinations of F (based on phased structure factors) and G constraints (based on structure-factor amplitudes) from different sources were applied in MEM calculations. In particular, a new combination of the MEM with the recently developed charge-flipping algorithm with histogram matching for powder diffraction data (pCF) was successfully introduced to avoid the inevitable bias of the phases of the structure-factor amplitudes by the Rietveld model. Completely ab initio electron-density distributions have been obtained with the MEM applied to a combination of structure-factor amplitudes from Le Bail fits with phases derived from pCF. All features of the crystal structures, in particular the disorder of the oxalate and carbonate anions, and the displacements of the cations, are clearly obtained. This approach bears the potential of a fast method of electron-density determination, even for highly disordered materials. All the MEM maps obtained in this work were compared with the MEM map derived from the best Rietveld refined model. In general, the phased observed structure factors obtained from Rietveld refinement (applying F and G constraints) were found to give the closest description of the experimental data and thus lead to the most accurate image of the actual disorder.

Samy, A.; Dinnebier, R; van Smaalen, S; Jansen, M

2010-01-01T23:59:59.000Z

351

Audio-Visual Biofeedback Does Not Improve the Reliability of Target Delineation Using Maximum Intensity Projection in 4-Dimensional Computed Tomography Radiation Therapy Planning  

SciTech Connect

Purpose: To investigate whether coaching patients' breathing would improve the match between ITV{sub MIP} (internal target volume generated by contouring in the maximum intensity projection scan) and ITV{sub 10} (generated by combining the gross tumor volumes contoured in 10 phases of a 4-dimensional CT [4DCT] scan). Methods and Materials: Eight patients with a thoracic tumor and 5 patients with an abdominal tumor were included in an institutional review board-approved prospective study. Patients underwent 3 4DCT scans with: (1) free breathing (FB); (2) coaching using audio-visual (AV) biofeedback via the Real-Time Position Management system; and (3) coaching via a spirometer system (Active Breathing Coordinator or ABC). One physician contoured all scans to generate the ITV{sub 10} and ITV{sub MIP}. The match between ITV{sub MIP} and ITV{sub 10} was quantitatively assessed with volume ratio, centroid distance, root mean squared distance, and overlap/Dice coefficient. We investigated whether coaching (AV or ABC) or uniform expansions (1, 2, 3, or 5 mm) of ITV{sub MIP} improved the match. Results: Although both AV and ABC coaching techniques improved frequency reproducibility and ABC improved displacement regularity, neither improved the match between ITV{sub MIP} and ITV{sub 10} over FB. On average, ITV{sub MIP} underestimated ITV{sub 10} by 19%, 19%, and 21%, with centroid distance of 1.9, 2.3, and 1.7 mm and Dice coefficient of 0.87, 0.86, and 0.88 for FB, AV, and ABC, respectively. Separate analyses indicated a better match for lung cancers or tumors not adjacent to high-intensity tissues. Uniform expansions of ITV{sub MIP} did not correct for the mismatch between ITV{sub MIP} and ITV{sub 10}. Conclusions: In this pilot study, audio-visual biofeedback did not improve the match between ITV{sub MIP} and ITV{sub 10}. In general, ITV{sub MIP} should be limited to lung cancers, and modification of ITV{sub MIP} in each phase of the 4DCT data set is recommended.

Lu, Wei, E-mail: wlu@umm.edu [Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland (United States); Neuner, Geoffrey A.; George, Rohini; Wang, Zhendong; Sasor, Sarah [Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland (United States); Huang, Xuan [Research and Development, Care Management Department, Johns Hopkins HealthCare LLC, Glen Burnie, Maryland (United States); Regine, William F.; Feigenberg, Steven J.; D'Souza, Warren D. [Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland (United States)

2014-01-01T23:59:59.000Z

352

Development and Performance of Detectors for the Cryogenic Dark Matter Search Experiment with an Increased Sensitivity Based on a Maximum Likelihood Analysis of Beta Contamination  

SciTech Connect

The Cryogenic Dark Matter Search (CDMS) uses cryogenically-cooled detectors made of germanium and silicon in an attempt to detect dark matter in the form of Weakly-Interacting Massive Particles (WIMPs). The expected interaction rate of these particles is on the order of 1/kg/day, far below the 200/kg/day expected rate of background interactions after passive shielding and an active cosmic ray muon veto. Our detectors are instrumented to make a simultaneous measurement of both the ionization energy and thermal energy deposited by the interaction of a particle with the crystal substrate. A comparison of these two quantities allows for the rejection of a background of electromagnetically-interacting particles at a level of better than 99.9%. The dominant remaining background at a depth of {approx} 11 m below the surface comes from fast neutrons produced by cosmic ray muons interacting in the rock surrounding the experiment. Contamination of our detectors by a beta emitter can add an unknown source of unrejected background. In the energy range of interest for a WIMP study, electrons will have a short penetration depth and preferentially interact near the surface. Some of the ionization signal can be lost to the charge contacts there and a decreased ionization signal relative to the thermal signal will cause a background event which interacts at the surface to be misidentified as a signal event. We can use information about the shape of the thermal signal pulse to discriminate against these surface events. Using a subset of our calibration set which contains a large fraction of electron events, we can characterize the expected behavior of surface events and construct a cut to remove them from our candidate signal events. This thesis describes the development of the 6 detectors (4 x 250 g Ge and 2 x 100 g Si) used in the 2001-2002 CDMS data run at the Stanford Underground Facility with a total of 119 livedays of data. The preliminary results presented are based on the first use of a beta-eliminating cut based on a maximum-likelihood characterization described above.

Driscoll, Donald D.; /Case Western Reserve U.

2004-01-01T23:59:59.000Z

353

Theory of Winds from Hot, Luminous Massive Stars  

E-Print Network (OSTI)

The high luminosities of massive stars drive strong stellar winds, through line scattering of the star's continuum radiation. This paper reviews the dynamics of such line driving, building first upon the standard CAK model for steady winds, and deriving the associated analytic scalings for the mass loss rate and wind velocity law. It next summarizes the origin and nature of the strong Line Deshadowing Instability (LDI) intrinsic to such line-driving, including also the role of a diffuse-line-drag effect that stabilizes the wind base, and then describes how both instability and drag are incorporated in the Smooth Source Function (SSF) method for time-dependent simulations of the nonlinear evolution of the resulting wind structure. The review concludes with a discussion of the effect of the resulting extensive structure in temperature, density and velocity for interpreting observational diagnostics. In addition to the usual clumping effect on density-squared diagnostics, the spatial porosity of optically thick ...

Owocki, Stanley

2014-01-01T23:59:59.000Z

354

To Appear in Astrophysical Journal 1998 Outflows and Luminous YSOs  

E-Print Network (OSTI)

.16 Massive Bipolar Outflow D.S. Shepherd 1 , A.M. Watson 2 , A.I. Sargent 1 , & E. Churchwell 3 ABSTRACT We M fi yr \\Gamma1 . The flow appears to be driven by an early­B star that is surrounded. 1997; Hunter et al. 1997; Shepherd & Churchwell 1996, hereafter SC96; Hartquist & Dyson 1997

Shepherd, Debra

355

A Connection between Obscuration and Star Formation in Luminous Quasars  

E-Print Network (OSTI)

We present a measurement of the star formation properties of a uniform sample of mid-IR selected, unobscured and obscured quasars (QSO1s and QSO2s) in the Bo\\"otes survey region. We use an spectral energy distribution (SED) analysis for photometric data spanning optical to far-IR wavelengths to decompose AGN and host galaxy components. We find that when compared to a matched sample of QSO1s, the QSO2s have higher far-IR detection fractions, far-IR fluxes and infrared star formation luminosities ($L_{\\rm IR}^{\\rm SF}$) by a factor of $\\sim2$. Correspondingly, we show that the AGN obscured fraction rises from 0.3 to 0.7 between $4-40\\times10^{11}L_\\odot$. We also find evidence associating the absorption in the X-ray emission with the presence of far-IR emitting dust. Overall, these results are consistent with galaxy evolution models in which quasar obscurations can be associated with a dust-enshrouded starburst galaxies.

Chen, Chien-Ting J; Alberts, Stacey; Harrison, Chris M; Alexander, David M; Assef, Roberto; Brown, Michael J I; Del Moro, Agnese; Forman, William R; Gorjian, Varoujan; Goulding, Andrew D; Hainline, Kevin N; Jones, Christine; Kochanek, Christopher S; Murray, Stephen S; Pope, Alexandra; Rovilos, Emmanouel; Stern, Daniel

2015-01-01T23:59:59.000Z

356

Luminance probes for contrast measurements in medical displays  

E-Print Network (OSTI)

processes in cathode-ray tubes [3]­[5], and elec- tronic crosstalk patterns in high-resolution active in materials and surfaces can be measured. I. INTRODUCTION Many radiology departments and laboratories], it was found that 54% of readings are performed using light-boxes, 33% are performed using cathode-ray tube

Kanicki, Jerzy

357

Human Mammary Luminal Epithelial Cells Contain Progenitors to Myoepithelial Cells  

E-Print Network (OSTI)

18 and 19 (K18K19), vimentin (vim) and ?-sm actin (ASMA) inDako), and vimentin (VIM; MEDAC, GmbH). Other antibodiesa mAb against vimentin (VIM, IgG1). The secondary antibodies

Pechoux, Christine

2010-01-01T23:59:59.000Z

358

Presentation 2.8: Program for the conversion of Russian municipal boilers with 20MW maximum capacity to biofuel due to funds from the emissions reduction units sell, under the Kyoto Protocol  

E-Print Network (OSTI)

economy in XXI century · High consumption of basic and service equipment · Low efficiency of equipment. roubles. Reconstruction period: 3 months Basic results: · Increased boiler's efficiency factor from 50Presentation 2.8: Program for the conversion of Russian municipal boilers with 20MW maximum

359

7-122 A solar pond power plant operates by absorbing heat from the hot region near the bottom, and rejecting waste heat to the cold region near the top. The maximum thermal efficiency that the power plant  

E-Print Network (OSTI)

calculated above. 7-123 A Carnot heat engine cycle is executed in a closed system with a fixed mass of steam can have is to be determined. Analysis The highest thermal efficiency a heat engine operating between transfer. Therefore, the maximum efficiency of the actual heat engine will be lower than the value

Bahrami, Majid

360

BPA COMMODITY LISTING July 2014 OM/FSS -O= Open Market/F= Federal Supply Bus. Sz. -S= Small Business/O= Other than Small MOL= Maximum Order Limit  

E-Print Network (OSTI)

BPA COMMODITY LISTING July 2014 OM/FSS - O= Open Market/F= Federal Supply Bus. Sz. - S= Small Business/O= Other than Small MOL= Maximum Order Limit B.P.A. # Vendor Name ATTN: Phone # City State/30/2014 O S $25,000.00 #12;BPA COMMODITY LISTING July 2014 B.P.A. # Vendor Name ATTN: Phone # City State

Rau, Don C.

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
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361

BPA COMMODITY LISTING February 2014 OM/FSS -O= Open Market/F= Federal Supply Bus. Sz. -S= Small Business/O= Other than Small MOL= Maximum Order Limit  

E-Print Network (OSTI)

BPA COMMODITY LISTING February 2014 OM/FSS - O= Open Market/F= Federal Supply Bus. Sz. - S= Small Business/O= Other than Small MOL= Maximum Order Limit B.P.A. # Vendor Name ATTN: Phone # City State,000.00 #12;BPA COMMODITY LISTING February 2014 B.P.A. # Vendor Name ATTN: Phone # City State Expiration O

Rau, Don C.

362

BPA COMMODITY LISTING August 2014 OM/FSS -O= Open Market/F= Federal Supply Bus. Sz. -S= Small Business/O= Other than Small MOL= Maximum Order Limit  

E-Print Network (OSTI)

BPA COMMODITY LISTING August 2014 OM/FSS - O= Open Market/F= Federal Supply Bus. Sz. - S= Small Business/O= Other than Small MOL= Maximum Order Limit B.P.A. # Vendor Name ATTN: Phone # City State/30/2014 O S $25,000.00 #12;BPA COMMODITY LISTING August 2014 B.P.A. # Vendor Name ATTN: Phone # City State

Rau, Don C.

363

Unveiling the Hearts of Luminous and Ultra-Luminous Infrared Galaxy Mergers with Laser Guide Star Adaptive Optics  

E-Print Network (OSTI)

precursor model with solar abundance and density n = 10 3 cmof shock models with solar abundance and density n = 10 3 cm

Medling, Anne Marie

2013-01-01T23:59:59.000Z

364

Unveiling the Hearts of Luminous and Ultra-Luminous Infrared Galaxy Mergers with Laser Guide Star Adaptive Optics  

E-Print Network (OSTI)

Boker, T. , Falc on-Barroso, J. , Schinnerer, E. , Knapen,ApJ, 675, L69 Falc on-Barroso, J. , Bacon, R. , Bureau,MNRAS, 369, 529 Falc on-Barroso, J. , Bacon, R. , Bureau,

Medling, Anne Marie

2013-01-01T23:59:59.000Z

365

Definition 0.1. Let D be any set and f W D ! R a function. An element 2 D is a (global or absolute) maximum for f on D if for all x 2 D, f ./ f .x/. The  

E-Print Network (OSTI)

Definition 0.1. Let D be any set and f W D ! R a function. An element 2 D is a (global or absolute the maximum value. Minimum is defined similarly. Definition 0.2. Let f W D ! R as above. The function f. The function f is said to be bounded if it is bounded both above and below. Now let D be a subset of R (the

Goodman, Fred

366

RTOG 0417: Efficacy of Bevacizumab in Combination With Definitive Radiation Therapy and Cisplatin Chemotherapy in Untreated Patients With Locally Advanced Cervical Carcinoma  

SciTech Connect

Purpose: Radiation Therapy Oncology Group 0417 was a phase II study that explored the safety and efficacy of the addition of bevacizumab to chemoradiation therapy. The safety results have been previously reported. Herein we report the secondary efficacy endpoints of overall survival (OS), locoregional failure (LRF), para-aortic nodal failure (PAF), distant failure (DF), and disease-free survival (DFS). Methods and Materials: Eligible patients with bulky Stage IB-IIIB disease were treated with once-weekly cisplatin (40 mg/m{sup 2}) chemotherapy and standard pelvic radiation therapy and brachytherapy. Bevacizumab was administered at 10 mg/kg intravenously every 2 weeks for 3 cycles during chemoradiation. For OS, failure was defined as death of any cause and was measured from study entry to date of death. LRF was defined as any failure in the pelvis. PAF was defined as any para-aortic nodal failure. DF was analyzed both including and excluding PAF. DFS was measured from study entry to date of first LRF. DF was measured with or without PAF or death. OS and DFS were estimated by the Kaplan-Meier method, and LRF and DF rates were estimated by the cumulative incidence method. Results: 49 eligible patients from 28 institutions were enrolled between 2006 and 2009. The median follow-up time was 3.8 years (range, 0.8-6.0 years). The surviving patients had a median follow-up time of 3.9 years (range, 2.1-6.0 years). Most patients had tumors of International Federation of Gynecology and Obstetrics Stage IIB (63%), and 80% were squamous. The 3-year OS, DFS, and LRF were 81.3% (95% confidence interval [CI], 67.2%-89.8%), 68.7% (95% CI, 53.5%-79.8%), and 23.2% (95% CI, 11%-35.4%), respectively. The PAF, DF without PAF, and DF with PAF at 3 years were 8.4% (95% CI, 0.4%-16.3%), 14.7% (95% CI, 4.5%-24.9%), and 23.1% (95% CI 11.0%-35.2%), respectively. Conclusion: In this study, bevacizumab in combination with standard pelvic chemoradiation therapy for locally advanced cervical cancer showed efficacy results that are promising and may warrant further investigation.

Schefter, Tracey, E-mail: tracey.schefter@ucdenver.edu [University of Colorado, Denver, Aurora, Colorado (United States); Winter, Kathryn [RTOG Statistical Center, Philadelphia, Pennsylvania (United States); Kwon, Janice S. [University of British Columbia and BC Cancer Agency, Vancouver, British Columbia (Canada); Stuhr, Kelly [University of Colorado, Denver, Aurora, Colorado (United States); Balaraj, Khalid [King Faisal Specialist Hospital and Research Centre, Riyadh (Saudi Arabia); Yaremko, Brian Patrick [Western University, London Regional Cancer Program, London, Ontario (Canada); Small, William [Loyola University Chicago Stritch School of Medicine, Chicago, Illinois (United States); Sause, William [Intermountain Medical Center, Murray, Utah (United States); Gaffney, David [University of Utah Health Sciences Center, Salt Lake City, Utah (United States)

2014-01-01T23:59:59.000Z

367

Buildings Energy Data Book: 5.6 Lighting  

Buildings Energy Data Book (EERE)

9 9 Typical Efficacies and Lifetimes of Lamps (1) Current Technology CRI (2) Incandescent 10 - 19 97 Halogen 14 - 20 99 Fluorescent - T5 25 - 55 52 - 75 Fluorescent - T8 35 - 87 7,500 - 20,000 52 - 90 Fluorescent - T12 35 - 92 7,500 - 20,000 50 - 92 Compact Fluorescent 40 - 70 82 Mercury Vapor 25 - 50 15 - 50 Metal Halide 65 - 70 High-Pressure Sodium 22 Low-Pressure Sodium 0 Solid State Lighting 33-97 Note(s): Source(s): 18 - 180 18,000 20 - 100 15,000 - 50,000 1) Theoretical maximum luminous efficacy of white light is 220 lumens/Watt. 2) CRI = Color Rendering Index, which indicates a lamp's ability to show natural colors. 3) The DOE Solid State Lighting program has set an efficacy goal twice that of fluorescent lights (160 lumen per Watt). DOE, EERE, Building Technology Program/Navigant Consulting, U.S. Lighting Market Characterization, Volume I: National Lighting Inventory and Energy

368

Data analysis: The maximum entropy method  

Science Journals Connector (OSTI)

... we go about it? Suppose the experiment is repeated TV times. We are at liberty to treat each experiment independently. In this case, our selection algorithm (whatever it ... overall distribution Pj for the outcomes / after the N repetitions. We are also at liberty to treat the whole as one large experiment, in which case our selection algorithm ...

John Skilling

1984-06-28T23:59:59.000Z

369

Maximum-Demand Rectangular Location Problem  

E-Print Network (OSTI)

Oct 1, 2014 ... Demand and service can be defined in the most general sense. ... Industrial and Systems Engineering, Texas A&M University, September 2014.

Manish Bansal

2014-10-01T23:59:59.000Z

370

Maximum Delay Computation for Interdomain Path Selection  

E-Print Network (OSTI)

and establishment of interdomain QoS-constrained tunnels, that mainly rely on RSVP-TE [3] and the PCE architecture tunnels, like the PCE-based mechanisms, since they are more suitable in the context we are working on

371

MAXIMUM ADDITIONAL SCORE: 2 points Description  

E-Print Network (OSTI)

; Many-Core Accelerator Architectures 1. A Performance and Energy Comparison of Convolution on GPUs in Production Processors via Software-Guided Thread Scheduling 7. Power Gating Strategies on GPUs #12; Network. #12;1. For a given simulator record its input parameters and its output metrics. 2. Experiment

Silvano, Cristina

372

Speech processing using maximum likelihood continuity mapping  

DOE Patents (OSTI)

Speech processing is obtained that, given a probabilistic mapping between static speech sounds and pseudo-articulator positions, allows sequences of speech sounds to be mapped to smooth sequences of pseudo-articulator positions. In addition, a method for learning a probabilistic mapping between static speech sounds and pseudo-articulator position is described. The method for learning the mapping between static speech sounds and pseudo-articulator position uses a set of training data composed only of speech sounds. The said speech processing can be applied to various speech analysis tasks, including speech recognition, speaker recognition, speech coding, speech synthesis, and voice mimicry.

Hogden, John E. (Santa Fe, NM)

2000-01-01T23:59:59.000Z

373

De Bruijn Sequences with Maximum Density  

E-Print Network (OSTI)

? Paint floor with a de Bruijn sequence Tuesday, June 21, 2011 #12;Fun Applications Where am I? Paint floor with a de Bruijn sequence Tuesday, June 21, 2011 #12;Fun Applications 1. Robot location 2. Tire tread design micro differences ensure even wear Tuesday, June 21, 2011 #12;Fun Applications 1. Robot

Williams, Aaron

374

Maximum likelihood estimation of aggregated Markov processes  

Science Journals Connector (OSTI)

...calculated derivatives for the search of the likelihood surface...probabilities for the process to enter the states in class a...summation in the last term takes into account the...maximally efficient in terms of the information content...optimization method for search of the likelihood space...

1997-01-01T23:59:59.000Z

375

Higher Order Maximum Persistency and Comparison Theorems  

E-Print Network (OSTI)

discrete variables (energy minimization in graphical models, weighted constraint ... 1.2 Energy Minimization . ...... This is useful in proofs, providing an alternative.

2014-10-15T23:59:59.000Z

376

Maximum Vacation Carryover Balance & Upcoming Holiday Shutdown...  

NLE Websites -- All DOE Office Websites (Extended Search)

24, 2014 through Sunday, January 4, 2015 for the annual holiday shutdown. The Lab will resume normal business operations on Monday, January 5, 2015. As a reminder, December 24, 25,...

377

ON SEMIDEFINITE PROGRAMMING RELAXATIONS OF MAXIMUM ...  

E-Print Network (OSTI)

Page 1 ... 1Department of Econometrics and OR, Tilburg University, The Netherlands, Warandelaan 2,. 5000 LE, Tilburg, The Netherlands; e.deklerk@uvt.

2010-07-27T23:59:59.000Z

378

Monthly and Annual Maximum Temperatures - Hanford Site  

NLE Websites -- All DOE Office Websites (Extended Search)

Station Real Time Met Data from Around the Site Current HMS Observations Daily HMS Extremes in Met Data Met and Climate Data Summary Products Historical Weather Charts Contacts...

379

Efficacy of rhBMP-2 loaded PCL/PLGA/?-TCP guided bone regeneration membrane fabricated by 3D printing technology for reconstruction of calvaria defects in rabbit  

Science Journals Connector (OSTI)

We successfully fabricated a three-dimensional (3D) printing-based PCL/PLGA/?-TCP guided bone regeneration (GBR) membrane that slowly released rhBMP-2. To impregnate the GBR membrane with intact rhBMP-2, collagen solution encapsulating rhBMP-2 (5?g?ml?1) was infused into pores of a PCL/PLGA/?-TCP membrane constructed using a 3D printing system with four dispensing heads. In a release profile test, sustained release of rhBMP-2 was observed for up to 28?d. To investigate the efficacy of the GBR membrane on bone regeneration, PCL/PLGA/?-TCP membranes with or without rhBMP-2 were implanted in an 8?mm calvaria defect of rabbits. Bone formation was evaluated at weeks 4 and 8 histologically and histomorphometrically. A space making ability of the GBR membrane was successfully maintained in both groups, and significantly more new bone was formed at post-implantation weeks 4 and 8 by rhBMP-2 loaded GBR membranes. Interestingly, implantation with rhBMP-2 loaded GBR membranes led to almost entire healing of calvaria defects within 8?weeks.

Jin-Hyung Shim; Min-Chul Yoon; Chang-Mo Jeong; Jinah Jang; Sung-In Jeong; Dong-Woo Cho; Jung-Bo Huh

2014-01-01T23:59:59.000Z

380

Nevada Test Site probable maximum flood study, part of US Geological Survey flood potential and debris hazard study, Yucca Mountain Site for US Department of Energy, Office of Civilian Radioactive Waste Management  

SciTech Connect

The US Geological Survey (USGS), as part of the Yucca Mountain Project (YMP), is conducting studies at Yucca Mountain, Nevada. The purposes of these studies are to provide hydrologic and geologic information to evaluate the suitability of Yucca Mountain for development as a high-level nuclear waste repository, and to evaluate the ability of the mined geologic disposal system (MGDS) to isolate the waste in compliance with regulatory requirements. In particular, the project is designed to acquire information necessary for the Department of Energy (DOE) to demonstrate in its environmental impact statement (EIS) and license application whether the MGDS will meet the requirements of federal regulations 10 CFR Part 60, 10 CFR Part 960, and 40 CFR Part 191. Complete study plans for this part of the project were prepared by the USGS and approved by the DOE in August and September of 1990. The US Bureau of Reclamation (Reclamation) was selected by the USGS as a contractor to provide probable maximum flood (PMF) magnitudes and associated inundation maps for preliminary engineering design of the surface facilities at Yucca Mountain. These PMF peak flow estimates are necessary for successful waste repository design and construction. The PMF technique was chosen for two reasons: (1) this technique complies with ANSI requirements that PMF technology be used in the design of nuclear related facilities (ANSI/ANS, 1981), and (2) the PMF analysis has become a commonly used technology to predict a ``worst possible case`` flood scenario. For this PMF study, probable maximum precipitation (PMP) values were obtained for a local storm (thunderstorm) PMP event. These values were determined from the National Weather Services`s Hydrometeorological Report No. 49 (HMR 49).

Bullard, K.L.

1994-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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381

Preliminary Study of the Efficacy of Using Nuclear Resonance Fluorescence with Quasi-Monoenergetic Gamma-Ray Sources for Nuclear Safeguards Assay  

SciTech Connect

We have studied the efficacy of using nuclear resonance fluorescence (NRF)-based techniques to assay spent nuclear fuel for Pu content using quasi-monoenergetic sources. We have developed two techniques to precisely determine the Pu content in a fuel rod/pin. One of our approaches is virtually free of systematic uncertainties. Using analytical models, we have determined the amount of time required to measure the Pu content in spent nuclear fuel rods and spent fuel assemblies to within 1% precision. We note that Pu content can be determined in a fuel assembly about as fast as in a single fuel pin. The performance of NRF-based assay techniques with improved photon sources, which are currently under development, will also estimated. For follow-on research we propose to: (1) Construct research prototype detection systems for both of the NRF-based assay systems proposed in this paper and measure their calibration curves; (2) Determine the systematic errors associated with both assay methods, explore ways to reduce the errors and fold the results into future performance calculations; (3) Develop an algorithm to assay a fuel assembly; (4) Perform validation measurements using a single pin and scaled assemblies; (5) Research and develop current-mode detection and/or threshold detection techniques to improve assay times; (6) Characterize the flux of newly constructed sources and fold the results into the calculations presented here to determine the feasibility of a variety of proposed sources; and (7) Collaborate with others in the safeguards community to build a prototype system and perform an NRF-based assay demonstration on spent fuel.

Johnson, M S; McNabb, D P; Hall, J M; Gonzalez, J J

2011-02-17T23:59:59.000Z

382

Efficacy of memantine in the treatment of fibromyalgia: A double-blind, randomised, controlled trial with 6-month follow-up  

Science Journals Connector (OSTI)

Abstract Fibromyalgia (FM) is a prevalent and disabling chronic disease. Recent studies have found elevated levels of glutamate in several brain regions, leading to hypotheses about the usefulness of glutamate-blocking drugs such as memantine in the treatment of FM. The aim of this study was to evaluate the efficacy of memantine in the treatment of pain and other clinical variables (global function, clinical impression, depression, anxiety, quality of life) in FM patients. A double-blind, parallel randomised controlled trial was developed. A total of 63 patients diagnosed with FM were recruited from primary health care centres in Zaragoza, Spain. Memantine was administered at doses of 20mg/d after 1month of titration. Assessments were carried out at baseline, posttreatment, and 3- and 6-month follow-up. Compared with a placebo group, memantine significantly decreased ratings on a pain visual analogue scale (Cohens d=1.43 at 6months) and pain measured with a sphygmomanometer (d=1.05). All other secondary outcomes except anxiety also improved, with moderate-to-large effect sizes at 6months. Compared with placebo, the absolute risk reduction obtained with memantine was 16.13% (95% confidence interval=2.0% to 32.6%), and the number needed to treat was 6.2 (95% confidence interval=3 to 47). Tolerance was good, with dizziness (8 patients) and headache (4 patients) being the most frequent side effects of memantine. Although additional studies with larger sample sizes and longer follow-up times are needed, this study provides preliminary evidence of the utility of memantine for the treatment of FM.

Brbara Olivan-Blzquez; Paola Herrera-Mercadal; Marta Puebla-Guedea; Mari-Cruz Prez-Yus; Eva Andrs; Nicolas Fayed; Yolanda Lpez-Del-Hoyo; Rosa Magallon; Miquel Roca; Javier Garcia-Campayo

2014-01-01T23:59:59.000Z

383

Tumor models for efficacy determination  

Science Journals Connector (OSTI)

...GFP or RFP have been developed (Hoffman website). The molecular characterization of many...with tumor response. In addition to the search for better models, there remains an effort...Cancer 1996;65:695-9. 25 Rockwell SC. Tumor-cell survival. In: Teicher...

Beverly A. Teicher

2006-10-01T23:59:59.000Z

384

OPERATIONAL NOTE EFFICACY OF DUETTM  

E-Print Network (OSTI)

in 3 rows stationed 30.5, 61.0, and 91.5 m downwind of the spray vehicle. Initial knockdown was .99, short environmental persistence, no bioaccumulation, and low mammalian toxicity reducing ecological risk

385

Chief Joseph Kokanee Enhancement Project; Strobe Light Deterrent Efficacy Test and Fish Behavior Determination at the Grand Coulee Dam Third Powerplant Forebay, 2002-2003 Annual Report.  

SciTech Connect

Since 1995, the Confederated Tribes of the Colville Reservation (Colville Confederated Tribes) have managed the Chief Joseph Kokanee Enhancement Project as part of the Northwest Power Planning Council (NWPPC) Fish and Wildlife Program. Project objectives have focused on understanding natural production of kokanee (a land-locked sockeye salmon) and other fish stocks in the area above Grand Coulee and Chief Joseph Dams on the Columbia River. A 42-month investigation concluded that entrainment at Grand Coulee Dam ranged from 211,685 to 576,676 fish annually. Further analysis revealed that 85% of the total entrainment occurred at the dam's third powerplant. These numbers represent a significant loss to the tribal fisheries upstream of the dam. In response to a suggestion by the NWPPC Independent Scientific Review Panel, the scope of work for the Chief Joseph Kokanee Enhancement Project was expanded to include a multiyear pilot test of a strobe light system to help mitigate fish entrainment. This report details the work conducted during the second year of the study by researchers of the Colville Confederated Tribes in collaboration with the Pacific Northwest National Laboratory. The 2002 study period extended from May 18 through July 30. The objective of the study was to determine the efficacy of a prototype strobe light system to elicit a negative phototactic response in kokanee and rainbow trout. The prototype system consisted of six strobe lights affixed to an aluminum frame suspended vertically underwater from a barge secured in the center of the entrance to the third powerplant forebay. The lights, controlled by a computer, were aimed to illuminate a specific region directly upstream of the barge. Three light level treatments were used: 6 of 6 lights on, 3 of 6 lights on, and all lights off. These three treatment conditions were applied for an entire 24-hr day and were randomly assigned within a 3-day block throughout the study period. A seven-transducer splitbeam hydroacoustic system was used to evaluate the effectiveness of the strobe lights in eliciting a negative phototactic response in fish. The transducers were deployed so they tracked fish entering and within the region illuminated by the strobe lights. Two of the seven transducers were mounted to the frame containing the strobe lights and were oriented horizontally. The remaining five transducers were spaced approximately 4 m apart on individual floating frames upstream of the barge, with the transducers looking vertically downward.

Johnson, R.; McKinstry, C.; Simmons, C. (Pacific Northwest National Laboratory)

2003-01-01T23:59:59.000Z

386

NOAA Technical Memorandum NMFS-SEFSC-570 ESTIMATION OF EFFORT, MAXIMUM SUSTAINABLE YIELD, AND MAXIMUM  

E-Print Network (OSTI)

Fisheries Service Southeast Fisheries Science Center Galveston Laboratory 4700 Avenue U Galveston, Texas 5825 Port Royal Galveston Laboratory Springfield, VA 22161 4700 Avenue U (800) 553-6847 or Galveston

387

Safety profile, efficacy, and biodistribution of a bicistronic high-capacity adenovirus vector encoding a combined immunostimulation and cytotoxic gene therapy as a prelude to a phase I clinical trial for glioblastoma  

SciTech Connect

Adenoviral vectors (Ads) are promising gene delivery vehicles due to their high transduction efficiency; however, their clinical usefulness has been hampered by their immunogenicity and the presence of anti-Ad immunity in humans. We reported the efficacy of a gene therapy approach for glioma consisting of intratumoral injection of Ads encoding conditionally cytotoxic herpes simplex type 1 thymidine kinase (Ad-TK) and the immunostimulatory cytokine fms-like tyrosine kinase ligand 3 (Ad-Flt3L). Herein, we report the biodistribution, efficacy, and neurological and systemic effects of a bicistronic high-capacity Ad, i.e., HC-Ad-TK/TetOn-Flt3L. HC-Ads elicit sustained transgene expression, even in the presence of anti-Ad immunity, and can encode large therapeutic cassettes, including regulatory elements to enable turning gene expression on or off according to clinical need. The inclusion of two therapeutic transgenes within a single vector enables a reduction of the total vector load without adversely impacting efficacy. Because clinically the vectors will be delivered into the surgical cavity, normal regions of the brain parenchyma are likely to be transduced. Thus, we assessed any potential toxicities elicited by escalating doses of HC-Ad-TK/TetOn-Flt3L (1 10{sup 8}, 1 10{sup 9}, or 1 10{sup 10} viral particles [vp]) delivered into the rat brain parenchyma. We assessed neuropathology, biodistribution, transgene expression, systemic toxicity, and behavioral impact at acute and chronic time points. The results indicate that doses up to 1 10{sup 9} vp of HC-Ad-TK/TetOn-Flt3L can be safely delivered into the normal rat brain and underpin further developments for its implementation in a phase I clinical trial for glioma. - Highlights: ? High capacity Ad vectors elicit sustained therapeutic gene expression in the brain. ? HC-Ad-TK/TetOn-Flt3L encodes two therapeutic genes and a transcriptional switch. ? We performed a dose escalation study at acute and chronic time points. ? Doses up to 1 10{sup 9} vp of HC-Ad-TK/TetOn-Flt3L can be safely delivered in the brain. ? Efficacy and safety of HC-Ad-TK/TetOn-Flt3L merits its use in a GBM Phase I trial.

Puntel, Mariana [Department of Neurosurgery, The University of Michigan School of Medicine, MSRB II, RM 4570C, 1150 West Medical Center Drive, Ann Arbor, MI 48109-5689 (United States); Department of Cell and Developmental Biology, The University of Michigan School of Medicine, MSRB II, RM 4570C, 1150 West Medical Center Drive, Ann Arbor, MI 48109-5689 (United States); Gene Therapeutics Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048 (United States); Ghulam, Muhammad A.K.M. [Gene Therapeutics Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048 (United States); Farrokhi, Catherine [Department of Psychiatry and Behavioral Neurosciences, Cedars Sinai Medical Center, Los Angeles, CA 90048 (United States); VanderVeen, Nathan; Paran, Christopher; Appelhans, Ashley [Department of Neurosurgery, The University of Michigan School of Medicine, MSRB II, RM 4570C, 1150 West Medical Center Drive, Ann Arbor, MI 48109-5689 (United States); Department of Cell and Developmental Biology, The University of Michigan School of Medicine, MSRB II, RM 4570C, 1150 West Medical Center Drive, Ann Arbor, MI 48109-5689 (United States); Kroeger, Kurt M.; Salem, Alireza [Gene Therapeutics Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048 (United States); Lacayo, Liliana [Department of Psychiatry and Behavioral Neurosciences, Cedars Sinai Medical Center, Los Angeles, CA 90048 (United States); Pechnick, Robert N. [Department of Psychiatry and Behavioral Neurosciences, Cedars Sinai Medical Center, Los Angeles, CA 90048 (United States); Department of Psychiatry and Behavioral Neurosciences, David Geffen School of Medicine, University of California, Los Angeles, CA (United States); Kelson, Kyle R.; Kaur, Sukhpreet; Kennedy, Sean [Gene Therapeutics Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048 (United States); Palmer, Donna; Ng, Philip [Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030 (United States); and others

2013-05-01T23:59:59.000Z

388

Discovery of N-(4-(2-Amino-3-chloropyridin-4-yloxy)-3-fluorophenyl)-4-ethoxy-1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide (BMS-777607), a Selective and Orally Efficacious Inhibitor of the Met Kinase Superfamily  

SciTech Connect

Substituted N-(4-(2-aminopyridin-4-yloxy)-3-fluoro-phenyl)-1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamides were identified as potent and selective Met kinase inhibitors. Substitution of the pyridine 3-position gave improved enzyme potency, while substitution of the pyridone 4-position led to improved aqueous solubility and kinase selectivity. Analogue 10 demonstrated complete tumor stasis in a Met-dependent GTL-16 human gastric carcinoma xenograft model following oral administration. Because of its excellent in vivo efficacy and favorable pharmacokinetic and preclinical safety profiles, 10 has been advanced into phase I clinical trials.

Schroeder, Gretchen M.; An, Yongmi; Cai, Zhen-Wei; Chen, Xiao-Tao; Clark, Cheryl; Cornelius, Lyndon A.M.; Dai, Jun; Gullo-Brown, Johnni; Gupta, Ashok; Henley, Benjamin; Hunt, John T.; Jeyaseelan, Robert; Kamath, Amrita; Kim, Kyoung; Lippy, Jonathan; Lombardo, Louis J.; Manne, Veeraswamy; Oppenheimer, Simone; Sack, John S.; Schmidt, Robert J.; Shen, Guoxiang; Stefanski, Kevin; Tokarski, John S.; Trainor, George L.; Wautlet, Barri S.; Wei, Donna; Williams, David K.; Zhang, Yingru; Zhang, Yueping; Fargnoli, Joseph; Borzilleri, Robert M.; (BMS)

2009-12-01T23:59:59.000Z

389

"Research to Improve the Efficacy of Captive Broodstock Programs and Advance Hatchery Reform Throughout the Columbia River Basin." [from the Abstract], 2008-2009 Progress Report.  

SciTech Connect

This project was developed to conduct research to improve the efficacy of captive broodstock programs and advance hatchery reform throughout the Columbia River Basin. The project has three objectives: (1) maintain adaptive life history characteristics in Chinook salmon, (2) improve imprinting in juvenile sockeye salmon, and (3) match wild phenotypes in Chinook and sockeye salmon reared in hatcheries. A summary of the results are as follows: Objective 1: The ratio of jack to adult male Chinook salmon were varied in experimental breeding populations to test the hypothesis that reproductive success of the two male phenotypes would vary with their relative frequency in the population. Adult Chinook salmon males nearly always obtained primary access to nesting females and were first to enter the nest at the time of spawning. Jack male spawning occurred primarily by establishing satellite positions downstream of the courting pair, and 'sneaking' into the nest at the time of spawning. Male dominance hierarchies were fairly stable and strongly correlated with the order of nest entry at the time of spawning. Observed participation in spawning events and adult-to-fry reproductive success of jack and adult males was consistent with a negative frequency-dependent selection model. Overall, jack males sired an average of 21% of the offspring produced across a range of jack male frequencies. Implications of these and additional findings on Chinook salmon hatchery broodstock management will be presented in the FY 2009 Annual Report. Objective 2: To determine the critical period(s) for imprinting for sockeye salmon, juvenile salmon were exposed to known odorants at key developmental stages. Molecular assessments of imprinting-induced changes in odorant receptor gene expression indicated that regulation of odorant expression is influenced by developmental status and odor exposure history. Expression levels of basic amino acid receptor (BAAR) mRNA in the olfactory epithelium increased dramatically during final maturation in both Stanley Basin and Okanogan River sockeye. These increases appeared to be independent of odor exposure history, rising significantly in both arginine-naive and arginine-exposed fish. However, sockeye exposed to arginine during smolting demonstrated a larger increase in BAAR mRNA than arginine-naive fish. These results are consistent with the hypothesis that odorant receptors sensitive to home stream waters may be upregulated at the time of the homing migration and may afford opportunities to exploit this system to experimentally characterize imprinting success and ultimately identify hatchery practices that will minimize straying of artificially produced salmonids. Additional analysis of Sockeye salmon imprinting and further implications of these findings will be presented in the FY 2009 Annual Report. Objective 3: Photoperiod at emergence and ration after ponding were varied in Yakima River spring Chinook salmon to test the hypothesis that seasonal timing of emergence and growth during early stages of development alter seasonal timing of smoltification and age of male maturation. Fish reared under conditions to advance fry emergence and accelerate growth had the greatest variation in seasonal timing of smolting (fall, spring and summer) and highest rates of early male maturation with most males maturing at age 1 (35-40%). In contrast, fish with delayed emergence and slow growth had the least variation in phenotypes with most fish smolting as yearlings in the spring and no age-1 male maturation. Growth (not emergence timing) altered rates of age-2 male maturation. Results of this study demonstrate that altering fry development, as is often done in hatcheries, can profoundly affect later life history transitions and the range of phenotypes within a spring Chinook salmon population. Additional work in the next funding period will determine if these rearing regimes affected other aspects of smolt quality, which may affect ultimate survival upon ocean entry.

Berejikian, Barry A. [National Oceanic and Atmospheric Administration, National Marine Fisheries Service

2009-08-18T23:59:59.000Z

390

Chief Joseph Kokanee Enhancement Project; Strobe Light Deterrent Efficacy Test and Fish Behavior Determination at the Grand Coulee Dam Third Powerplant Forebay, 2003-2004 Annual Report.  

SciTech Connect

Since 1995, the Confederated Tribes of the Colville Reservation (Colville Confederated Tribes) have managed the Chief Joseph Kokanee Enhancement Project as part of the Northwest Power Planning Council (NWPPC) Fish and Wildlife Program. Project objectives have focused on understanding natural production of kokanee (a land-locked sockeye salmon) and other fish stocks in the area above Grand Coulee and Chief Joseph Dams on the Columbia River. A 42-month investigation from 1996 to 1999 determined that from 211,685 to 576,676 fish were entrained annually at Grand Coulee Dam. Analysis of the entrainment data found that 85% of the total entrainment occurred at the dam's third powerplant. These numbers represent a significant loss to the tribal fisheries upstream of the dam. In response to a suggestion by the NWPPC Independent Scientific Review Panel, the scope of work for the Chief Joseph Kokanee Enhancement Project was expanded to include a multiyear pilot test of a strobe light system to help mitigate fish entrainment. This report details the work conducted during the third year of the strobe light study by researchers of the Colville Confederated Tribes in collaboration with the Pacific Northwest National Laboratory. The objective of the study is to determine the efficacy of a prototype strobe light system to elicit a negative phototactic response in kokanee and rainbow trout under field conditions. The prototype system consists of six strobe lights affixed to an aluminum frame suspended 15 m vertically underwater from a barge secured in the center of the entrance to the third powerplant forebay. The lights, controlled by a computer, illuminate a region directly upstream of the barge. The 2003 study period extended from June 16 through August 1. Three light treatments were used: all six lights on for 24 hours, all lights off for 24 hours, and three of six lights cycled on and off every hour for 24 hours. These three treatment conditions were assigned randomly within a 3-day block throughout the study period. Hydroacoustic technology was used to evaluate the effectiveness of the strobe lights in eliciting a negative phototactic response in fish. The hydroacoustic system in 2003 comprised seven splitbeam transducers arrayed in front of the strobe lights, two multibeam transducers behind the lights, and a mobile splitbeam system. The seven splitbeam transducers were deployed so they tracked fish entering and within the region illuminated by the strobe lights. These transducers were spaced approximately 4 m apart on an aluminum frame floating upstream of the barge and looked vertically downward. The multibeam transducers monitored the distribution of fish directly behind and to both sides of the lights, while the mobile splitbeam system looked at the distribution of fish within the third powerplant forebay. To augment the hydroacoustic data, additional studies were conducted. The hydrodynamic characteristics of the third powerplant forebay were measured, and acoustically tagged juvenile kokanee were released upstream of the strobe lights and tracked within the forebay and downstream of the dam. Analysis of the effect of strobe lights on kokanee and rainbow trout focused on the number of fish detected in each of the areas covered by one of the downlooking transducers, the timing of fish arrivals after the status of the strobe lights changed, fish swimming effort (detected velocity minus flow velocity), and fish swimming direction. Water velocity measurements were used to determine fish swimming effort. The tracking of tagged kokanee provided data on fish movements into and out of the third powerplant forebay, including entrainment.

Simmons, M.; McKinstry, C.; Cook, C.

2004-01-01T23:59:59.000Z

391

"Research to Improve the Efficacy of Captive Broodstock Programs and Advance Hatchery Reform Throughout the Columbia River Basin." [from the Abstract], 2007-2008 Annual Progress Report.  

SciTech Connect

This project was developed to conduct research to improve the efficacy of captive broodstock programs and advance hatchery reform throughout the Columbia river basin. The project has three objectives: (1) maintain adaptive life history characteristics in Chinook salmon, (2) improve imprinting in juvenile sockeye salmon, and (3) match wild phenotypes in Chinook and sockeye salmon reared in hatcheries. A summary of the results are as follows: Objective 1: Adult and jack Chinook salmon males were stocked into four replicate spawning channels at a constant density (N = 16 per breeding group), but different ratios, and were left to spawn naturally with a fixed number of females (N = 6 per breeding group). Adult males obtained primary access to females and were first to enter the nest at the time of spawning. Jack male spawning occurred primarily by establishing satellite positions downstream of the courting pair, and 'sneaking' into the nest at the time of spawning. Male dominance hierarchies were fairly stable and strongly correlated with the order of nest entry at the time of spawning. Spawning participation by jack and adult males is consistent with a negative frequency dependent selection model, which means that selection during spawning favors the rarer life history form. Results of DNA parentage assignments will be analyzed to estimate adult-to-fry fitness of each male. Objective 2: To determine the critical period(s) for imprinting for sockeye salmon, juvenile salmon were exposed to known odorants at key developmental stages. Molecular assessments of imprinting-induced changes in odorant receptor gene expression indicated that regulation of odorant expression is influenced by developmental status and odor exposure history. The results suggest that sockeye salmon are capable of imprinting to homing cues during the developmental periods that correspond to several of current release strategies employed as part of the Captive Broodstock program (specifically, planting eyed eggs, fall and smolt releases into the lake) appear to be appropriate for successful homing of sockeye in Redfish Lake. Also, our findings indicated that sockeye salmon were capable of olfactory imprinting at multiple life stages and over varying exposure durations. Fish exposed to odors just prior to smolting showed the strongest attraction to the imprinting odor arginine and this period corresponds to the period of highest plasma thyroxine levels and increased BAAR receptor mRNA in juveniles. Objective 3: Spring Chinook salmon were exposed to three different photoperiods and three feed rations at the button-up stage of development. Both photoperiod at emergence and ration post-ponding affected the number of males maturing at age one. Nearly 70% of the males in the early emergence and satiation fed group matured after the first year of rearing, while none of the fish reared on late emergence photoperiod (equivalent to emergence on May 1) matured during this time irrespective of ration treatment. Within the early emergence groups, reducing growth using ration (low or high) appeared to reduce the number of males maturing at age one from 70% to 40-50%. Maturation rates of fish that emerged in a photoperiod equivalent to mid-February (middle emergence) ranged from 10-25%. Together these data indicate that the seasonal timing of fry emergence and growth after ponding can alter life history patterns in spring Chinook salmon. The results imply that hatchery rearing practices that alter seasonal timing of fry emergence can have drastic effects on life history patterns in juvenile Chinook salmon. All three objectives are on-going and will result in recommendations (at the end of the FY 2009 performance period) to advance hatchery reforms in conventional and captive broodstock programs.

Berejikian, Barry A. [National Marine Fisheries Service

2009-04-08T23:59:59.000Z

392

Highly Efficient Small Form Factor LED Retrofit Lamp  

SciTech Connect

This report summarizes work to develop a high efficiency LED-based MR16 lamp downlight at OSRAM SYLVANIA under US Department of Energy contract DE-EE0000611. A new multichip LED package, electronic driver, and reflector optic were developed for these lamps. At steady-state, the lamp luminous flux was 409 lumens (lm), luminous efficacy of 87 lumens per watt (LPW), CRI (Ra) of 87, and R9 of 85 at a correlated color temperature (CCT) of 3285K. The LED alone achieved 120 lumens per watt efficacy and 600 lumen flux output at 25 C. The driver had 90% electrical conversion efficiency while maintaining excellent power quality with power factor >0.90 at a power of only 5 watts. Compared to similar existing MR16 lamps using LED sources, these lamps had much higher efficacy and color quality. The objective of this work was to demonstrate a LED-based MR16 retrofit lamp for replacement of 35W halogen MR16 lamps having (1) luminous flux of 500 lumens, (2) luminous efficacy of 100 lumens per watt, (3) beam angle less than 40{sup o} and center beam candlepower of at least 1000 candelas, and (4) excellent color quality.

Steven Allen; Fred Palmer; Ming Li

2011-09-11T23:59:59.000Z

393

Confocal microphotoluminescence of InGaN-based light-emitting diodes Koichi Okamoto,a  

E-Print Network (OSTI)

for conventional incandescent and fluorescent light bulbs.5 However, luminous efficacies of commercial white LEDs spectrum region, the external quantum efficiency ext of the LED has achieved 20% at room temperature 25 lm/W have been still lower than that of fluorescent tubes 75 lm/W . Thus, the most important re

Okamoto, Koichi

394

Luminous blue variable eruptions and related transients: diversity of progenitors and outburst properties  

Science Journals Connector (OSTI)

......ejected mass and velocity, different input radiative and kinetic energy budgets...lower mass stars require a substantial input of extra energy to bring them to the...imagine that the energy source could be nuclear fusion of a small amount of material, if oscillations......

Nathan Smith; Weidong Li; Jeffrey M. Silverman; Mohan Ganeshalingam; Alexei V. Filippenko

2011-07-21T23:59:59.000Z

395

HESS J1640465 an exceptionally luminous TeV -ray supernova remnant  

Science Journals Connector (OSTI)

......6-arcmin (2sigma) larger than in the...lines. 610-MHz radio contours...uncertainties in e.g. atmospheric conditions...the missing area due to excluded...the SNR have a large influence on...especially if the plasma temperature...10erg2-s1 at 610-MHz within the X-ray...expected to have a larger extent in radio......

HESS Collaboration; A. Abramowski; F. Aharonian; F. Ait Benkhali; A. G. Akhperjanian; E. Angner; G. Anton; S. Balenderan; A. Balzer; A. Barnacka; Y. Becherini; J. Becker Tjus; K. Bernlhr; E. Birsin; E. Bissaldi; J. Biteau; M. Bttcher; C. Boisson; J. Bolmont; P. Bordas; J. Brucker; F. Brun; P. Brun; T. Bulik; S. Carrigan; S. Casanova; M. Cerruti; P. M. Chadwick; R. Chalme-Calvet; R. C. G. Chaves; A. Cheesebrough; M. Chrtien; S. Colafrancesco; G. Cologna; J. Conrad; C. Couturier; Y. Cui; M. Dalton; M. K. Daniel; I. D. Davids; B. Degrange; C. Deil; P. deWilt; H. J. Dickinson; A. Djannati-Ata; W. Domainko; L. O'C. Drury; G. Dubus; K. Dutson; J. Dyks; M. Dyrda; T. Edwards; K. Egberts; P. Eger; P. Espigat; C. Farnier; S. Fegan; F. Feinstein; M. V. Fernandes; D. Fernandez; A. Fiasson; G. Fontaine; A. Frster; M. Fling; M. Gajdus; Y. A. Gallant; T. Garrigoux; G. Giavitto; B. Giebels; J. F. Glicenstein; M.-H. Grondin; M. Grudzi?ska; S. Hffner; J. Hahn; J. Harris; G. Heinzelmann; G. Henri; G. Hermann; O. Hervet; A. Hillert; J. A. Hinton; W. Hofmann; P. Hofverberg; M. Holler; D. Horns; A. Jacholkowska; C. Jahn; M. Jamrozy; M. Janiak; F. Jankowsky; I. Jung; M. A. Kastendieck; K. Katarzy?ski; U. Katz; S. Kaufmann; B. Khlifi; M. Kieffer; S. Klepser; D. Klochkov; W. Klu?niak; T. Kneiske; D. Kolitzus; Nu. Komin; K. Kosack; S. Krakau; F. Krayzel; P. P. Krger; H. Laffon; G. Lamanna; J. Lefaucheur; A. Lemire; M. Lemoine-Goumard; J.-P. Lenain; D. Lennarz; T. Lohse; A. Lopatin; C.-C. Lu; V. Marandon; A. Marcowith; R. Marx; G. Maurin; N. Maxted; M. Mayer; T. J. L. McComb; J. Mhault; P. J. Meintjes; U. Menzler; M. Meyer; R. Moderski; M. Mohamed; E. Moulin; T. Murach; C. L. Naumann; M. de Naurois; J. Niemiec; S. J. Nolan; L. Oakes; S. Ohm; E. de Oa Wilhelmi; B. Opitz; M. Ostrowski; I. Oya; M. Panter; R. D. Parsons; M. Paz Arribas; N. W. Pekeur; G. Pelletier; J. Perez; P.-O. Petrucci; B. Peyaud; S. Pita; H. Poon; G. Phlhofer; M. Punch; A. Quirrenbach; S. Raab; M. Raue; A. Reimer; O. Reimer; M. Renaud; R. de los Reyes; F. Rieger; L. Rob; C. Romoli; S. Rosier-Lees; G. Rowell; B. Rudak; C. B. Rulten; V. Sahakian; D. A. Sanchez; A. Santangelo; R. Schlickeiser; F. Schssler; A. Schulz; U. Schwanke; S. Schwarzburg; S. Schwemmer; H. Sol; G. Spengler; F. Spies; ?. Stawarz; R. Steenkamp; C. Stegmann; F. Stinzing; K. Stycz; I. Sushch; A. Szostek; J.-P. Tavernet; T. Tavernier; A. M. Taylor; R. Terrier; M. Tluczykont; C. Trichard; K. Valerius; C. van Eldik; B. van Soelen; G. Vasileiadis; C. Venter; A. Viana; P. Vincent; J. Vink; H. J. Vlk; F. Volpe; M. Vorster; T. Vuillaume; S. J. Wagner; P. Wagner; M. Ward; M. Weidinger; Q. Weitzel; R. White; A. Wierzcholska; P. Willmann; A. Wrnlein; D. Wouters; V. Zabalza; M. Zacharias; A. Zajczyk; A. A. Zdziarski; A. Zech; H.-S. Zechlin

2014-01-01T23:59:59.000Z

396

A Genetic Basis for Luminal and Basal-Type Breast Cancer.  

E-Print Network (OSTI)

??abstractIn the Western world, breast cancer not only is the most frequently diagnosed cancer in women, but also the second leading cause of cancer death. (more)

A. Hollestelle (Antoinette)

2009-01-01T23:59:59.000Z

397

Effect of ambient light on electronically displayed medical images as measured by luminance-discrimination thresholds  

Science Journals Connector (OSTI)

The effect of ambient light on linearization of gray scales was studied in two experiments by measuring brightness-discrimination thresholds for stimuli as a function of ambient-light...

Rogers, Diane C; Pizer, Stephen M; Johnston, R Eugene

1987-01-01T23:59:59.000Z

398

E-Print Network 3.0 - antegrade colonic luminal Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

was found for the CSM (r Source: Brasseur, James G. - Department of Mechanical and Nuclear Engineering, Pennsylvania State University Collection: Engineering 4 Pfl0gers Arch...

399

Local luminance nonlinearity and receptor aliasing in the detection of high-frequency gratings  

Science Journals Connector (OSTI)

Contrast sensitivity for orientation discrimination is limited to spatial frequencies below 5060 cycles per degree by neural spatial integration, and we find that contrast...

He, Sheng; MacLeod, Donald I A

1996-01-01T23:59:59.000Z

400

Transient luminous events above two mesoscale convective systems: Charge moment change analysis  

E-Print Network (OSTI)

in a cloudtoground (CG) lightning flash [Pasko et al., 1996, 1997; Williams, 2001; Pasko, 2010]. Related to sprites] Charge moment change (DMQ) data were examined for 41 positive cloudtoground (+CG) lightning discharges afterward. Threedimensional lightning mapping data provided positions for the incloud components

Rutledge, Steven

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

On the X-ray spectra of luminous, inhomogeneous accretion flows  

E-Print Network (OSTI)

We discuss the expected X-ray spectral and variability properties of black hole accretion discs at high luminosity, under the hypothesis that radiation pressure dominated discs are subject to violent clumping instabilities and, as a result, have a highly inhomogeneous two-phase structure. After deriving the full accretion disc solutions explicitly in terms of the parameters of the model, we study their radiative properties both with a simple two-zones model, treatable analytically, and with radiative transfer simulations which account simultaneously for energy balance and Comptonisation in the hot phase, together with reflection, reprocessing, ionization and thermal balance in the cold phase. We show that, if not only the density, but also the heating rate within these flows is inhomogeneous, then complex reflection-dominated spectra can be obtained for a high enough covering fraction of the cold phase. In general, large reflection components in the observed X-ray spectra should be associated with strong soft excesses, resulting from the combined emission of ionized atomic emission lines. The variability properties of such systems are such that, even when contributing to a large fraction of the hard X-ray spectrum, the reflection component is less variable than the power-law like emission originating from the hot Comptonising phase, in agreement with what is observed in many Narrow Line Seyfert 1 galaxies and bright Seyfert 1. Our model falls within the family of those trying to explain the complex X-ray spectra of bright AGN with ionized reflection, but presents an alternative, specific, physically motivated, geometrical setup for the complex multi-phase structure of the inner regions of near-Eddington accretion flows.

A. Merloni; J. Malzac; A. C. Fabian; R. R. Ross

2006-06-12T23:59:59.000Z

402

The angular power spectra of photometric Sloan Digital Sky Survey luminous red galaxies  

Science Journals Connector (OSTI)

......prototype to next generation surveys such as the Dark Energy Survey and, furthermore, is a photometric precursor...these papers. Upcoming surveys, such as the Dark Energy Survey (The Dark Energy Survey Collaboration 2005), are heavily based on......

Shaun A. Thomas; Filipe B. Abdalla; Ofer Lahav

2011-04-11T23:59:59.000Z

403

MAGNETIC INFLUENCE ON THE STABILITY OF LUMINOUS STELLAR ENVELOPES Richard B. Stothers  

E-Print Network (OSTI)

generates small local magnetic fields. These magnetic structures would consist of well-tangled field lines that the magnetic field lines became twisted and shredded into small flux tubes by the turbulent motions probably shreds any magnetic field that is buoyed up from the radiative region below and probably also

404

Luminous blue variable eruptions and related transients: diversity of progenitors and outburst properties  

Science Journals Connector (OSTI)

......kinetic to radiated energy in Car (Smith et al...examples such as Car, where the kinetic energy budget of 1050...outburst like that of Car. For example...has described alternative stellar evolution...mass and thermal energy are above the......

Nathan Smith; Weidong Li; Jeffrey M. Silverman; Mohan Ganeshalingam; Alexei V. Filippenko

2011-07-21T23:59:59.000Z

405

Rapid formation of large dust grains in the luminous supernova SN 2010jl  

E-Print Network (OSTI)

The origin of dust in galaxies is still a mystery. The majority of the refractory elements are produced in supernova explosions but it is unclear how and where dust grains condense and grow, and how they avoid destruction in the harsh environments of star-forming galaxies. The recent detection of 0.1-0.5 solar masses of dust in nearby supernova remnants suggests in situ dust formation, while other observations reveal very little dust in supernovae the first few years after explosion. Observations of the bright SN 2010jl have been interpreted as pre-existing dust, dust formation or no dust at all. Here we report the rapid (40-240 days) formation of dust in its dense circumstellar medium. The wavelength dependent extinction of this dust reveals the presence of very large (> 1 micron) grains, which are resistant to destructive processes. At later times (500-900 days), the near-IR thermal emission shows an accelerated growth in dust mass, marking the transition of the supernova from a circumstellar- to an ejecta-...

Gall, Christa; Watson, Darach; Dwek, Eli; Maund, Justyn R; Fox, Ori; Leloudas, Giorgos; Malesani, Daniele; Day-Jones, Avril C

2014-01-01T23:59:59.000Z

406

Discovery of two new Galactic candidate luminous blue variables with Wide-field Infrared Survey Explorer  

Science Journals Connector (OSTI)

......simbad/ 4 http://webviz.u-strasbg.fr/viz-bin/VizieR 5 http://irsa.ipac.caltech.edu/cgi-bin/Gator/nph-dd 6 http://www.lsw.uni-heidelberg.de/users/ostahl/pcyg/ 7 We measured the EWs of DIBs in both spectra......

V. V. Gvaramadze; A. Y. Kniazev; A. S. Miroshnichenko; L. N. Berdnikov; N. Langer; G. S. Stringfellow; H. Todt; W.-R. Hamann; E. K. Grebel; D. Buckley; L. Crause; S. Crawford; A. Gulbis; C. Hettlage; E. Hooper; T.-O. Husser; P. Kotze; N. Loaring; K. H. Nordsieck; D. O?Donoghue; T. Pickering; S. Potter; E. Romero Colmenero; P. Vaisanen; T. Williams; M. Wolf; D. E. Reichart; K. M. Ivarsen; J. B. Haislip; M. C. Nysewander; A. P. LaCluyze

2012-04-21T23:59:59.000Z

407

DOE Publishes GATEWAY Report on High-Luminous-Flux LED Lighting...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

of the lighting system, despite the reduction in pole height. The combination of the optics and lower pole height reduced stray light considerably. The expected annual...

408

The application of luminance mapping to discomfort glare : a modified glare index for green buildings.  

E-Print Network (OSTI)

??Unfortunately, there is no reliable method to adequately quantify discomfort glare. One of the world's largest investigations on discomfort glare was conducted in five Green (more)

Hirning, Michael B.

2014-01-01T23:59:59.000Z

409

High Quality Down Lighting Luminaire with 73% Overall System Efficiency  

SciTech Connect

This report summarizes work to develop a high flux, high efficiency LED-based downlight at OSRAM SYLVANIA under US Department of Energy contract DE-FC26-08NT01582. A new high power LED and electronic driver were developed for these downlights. The LED achieved 100 lumens per watt efficacy and 1700 lumen flux output at a correlated color temperature of 3500K. The driver had 90% electrical conversion efficiency while maintaining excellent power quality with power factor >0.99, and total harmonic distortion <10%. Two styles of downlights using the LED and driver were shown to exceed the project targets for steady-state luminous efficacy and flux of 70 lumens per watt and 1300 lumens, respectively. Compared to similar existing downlights using compact fluorescent or LED sources, these downlights had much higher efficacy at nearly the same luminous flux.

Robert Harrison; Steven C. Allen; Joseph Bernier; Robert Harrison

2010-08-31T23:59:59.000Z

410

Development of more efficacious Tc-99m organ imaging agents for use in nuclear medicine by analytical characterization of radiopharmaceutical mixtures: Progress report for period September 1, 1986-August 31, 1987  

SciTech Connect

The long-range objective of this research is the development of more efficacious technetium-99m radiopharmaceuticals for use as imaging agents in diagnostic nuclear medicine. The author developed analytical techniques that are capable of separating radiopharmaceutical mixtures into their component technetium complexes for subsequent evaluation. During this one-year period, a chromatographic procedure has been developed for the separation of technetium phosphonoacetic acid (PAA) complexes and five Tc-PAA complexes have been isolated from radiopharmaceutical preparations. The concentration of each complex in the preparation varies significantly depending on the pH of the preparation. Radiopharmaceutical preparations based on the ligand methylene diphosphonate (MDP) have been prepared by electrochemical reduction of TcO/sub 4//sup -/. The yields of different Tc-MDP complexes are affected by the potential applied to the electrochemical cell. The control of both potential and pH enables a specific Tc-MDP complex to be produced in purer form and higher yield than by chemical reduction. An EXAFS spectrum of a solution of chromatographically isolated Tc-HEDP (hydroxyethylidine diphosphonate) complex shows evidence for a Tc-Tc bond, which is supportive of the postulated oligomeric/polymeric nature of these complexes. 9 refs., 4 figs.

Heineman, W.R.

1987-06-01T23:59:59.000Z

411

Vacuum ultra-violet emission of plasma discharges with high Xe partial pressure using a cathode protective layer with high secondary electron emission  

SciTech Connect

In this work, the mechanism of the vacuum ultra-violet (VUV) emission of plasma discharges, with high Xe partial pressure and high ion-induced secondary electrons emission protective layer, is studied by measuring the VUV light emission directly and comparing it with two-dimensional simulations. From the panel measurement, we find that the high intensity of excimer VUV mainly contributes to the high luminous efficacy of SrCaO-plasma display panels (PDP) at a low sustain voltage. The unchanged Xe excitation efficiency indicates that the electron temperature is not decreased by the high secondary electrons emission protective layer, even though the sustain voltage is much lower. From the two-dimensional simulations, we can find that the ratio of excimer VUV to resonant VUV, which is determined by the collision rate in the discharge, is only significantly affected by the Xe partial pressure, while it is independent of the sustain voltage and the secondary-electrons-emission capability of protective layer. The unchanged average electron energy at the moment when the electric field becomes maximum confirms that the improvement of the VUV production efficiency mainly is attributed to the increase in electron heating efficiency of a PDP with high ion-induced secondary electrons emission protective layer. Combining the experimental and the simulation results, we conclude about the mechanism by which the VUV production is improved for the plasma display panel with a high Xe partial pressure and a cold cathode with high ion-induced secondary electrons emission.

Zhu, Di [School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin (China); Song, Le, E-mail: songle@tju.edu.cn [State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin (China); Zhang, Xiong [School of Electronic Science and Engineering, Southeast University, Nanjing (China); Kajiyama, Hiroshi [Graduate School of Advanced Science of Matter, Hiroshima University, Higashi-hiroshima, Hiroshima (Japan)

2014-02-14T23:59:59.000Z

412

GRASP with path-relinking for the weighted maximum satisfiability ...  

E-Print Network (OSTI)

Jan 17, 2005 ... take longer, we seek to determine if the longer iterations pay off in terms of a reduction in number of iterations .... S.A. Cook. The complexity of...

2005-01-17T23:59:59.000Z

413

Maximum and minimum sensitizable timing analysis using data dependent delays  

E-Print Network (OSTI)

.5 ps is given by: t30:5o;rise = t30:5 53:0a;1 t30:5 53:0c;f all +t30:5 50:5a;f all t30:5 50:5c;1 +t30:5 30:5a;f all t30:5 30:5c;f all +St30:5 50:5

Singh, Karandeep

2007-09-17T23:59:59.000Z

414

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network (OSTI)

Oxford ; New York ; Oxford University Press. Fuel- Trac,Spent Fuel / Reprocessing, in Nuclear Industry Statusto Burn Non-Fissile Fuels. 2008. GA. Energy Multiplier

Heidet, Florent

2010-01-01T23:59:59.000Z

415

Retrocommissioning Case Study - Applying Building Selection Criteria for Maximum Results  

E-Print Network (OSTI)

and effectively (Haasl, Sharp 1999). This paper presents a case study of a utility-funded retrocommissioning evaluation on a 125,000 SF office facility in La Mesa, California. The commissioning process consisted of site visits, interviews with facility staff, data...

Luskay, L.; Haasl, T.; Irvine, L.; Frey, D.

2002-01-01T23:59:59.000Z

416

Hefting for a Maximum Distance Throw: A Smart Perceptual  

E-Print Network (OSTI)

for the hefting machine. This research illustrates a methodological paradigm for the study of perceptual categories. Comparison is made to size-weight illusion methodology. INTRODUCTION A task familiar to many from (Bingham. in press; Fowler & Turvey. 1978; Kugler & Tuxvey. 1987; Saltzman & Kelso. 1987; Solomon & Turvey

417

A Continuous Characterization of the Maximum-Edge Biclique ...  

E-Print Network (OSTI)

Dec 20, 2012 ... Let A ? {0,1}mn be the biadjacency matrix of the bipartite graph G ...... on a desktop computer running MATLAB R2012b (64 bits) on an IntelR.

2012-12-20T23:59:59.000Z

418

"Maximum recycling of Material and Energy, Minimum of Landfilling"  

E-Print Network (OSTI)

in "Recycling". "Waste-to-Energy" is now defined as Recycling, when energy efficiency is > 0,65 Prevention Reuse Recycling and Waste-to Energy? #12;6 European Policies on Landfill Ban The EU Landfill Directive The amount Ban decided upon in 2000, in force in 2005. A very strong effect, with a strong increase of Waste-to-Energy

Columbia University

419

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network (OSTI)

As the heavy metal density of carbide fuel is 6% smallera heavy metal density close to that of the carbide fuel butcarbide fuel or inert matrix dispersion fuel due to the lowered heavy metal

Heidet, Florent

2010-01-01T23:59:59.000Z

420

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network (OSTI)

1996. 12 p. Toshinsky, G.I. , LMFBR Operation in the Nuclearand characterization of LMFBR carbide and nitride fuels andcores with oxide fuel, LMFBR recycle Pu/U, are used.

Heidet, Florent

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Copulas with Maximum Entropy Julia Piantadosi, Phil Howlett, Jonathan Borwein  

E-Print Network (OSTI)

correlation coefficients. This problem is formulated as the maximization of a concave function on a convex of the feasible region. The theory of Fenchel duality is used to reformulate the problem as an unconstrained marginal probability distributions. A checkerboard copula is a distribution with a corresponding density

Borwein, Jonathan

422

Maximum Partial Area Rule for Phase Equilibrium Calculations  

Science Journals Connector (OSTI)

Figure 5 shows an area (AOC) related to the overall composition (z1). ... The numerical value of AOC equals that of the distance between the Gibbs curve and its tangent line at the fixed input overall composition as illustrated by Figure 6 on which ML denotes a value calculated from the model at the overall composition and TL denotes the tangent-line value for the same composition. ... On Figure 5, EAR requires that AOC + U2 equal |L|. ...

Guor-Shiarn Shyu; Nishawn S. M. Hanif; Kenneth R. Hall; Philip T. Eubank

1996-11-07T23:59:59.000Z

423

Interhemispheric Ice-Sheet Synchronicity During the Last Glacial Maximum  

Science Journals Connector (OSTI)

...Model (AGCM) simulations indicate that...used these AGCM simulations as sensitivity...caused an initial rapid global mean sea-level...Peltier W. R. , Modeling of polar ocean...New methods for automated laminae recognition...Jacobs S. S. , Rapid bottom melting...three PMIP2 LGM simulations . J. Clim...

Michael E. Weber; Peter U. Clark; Werner Ricken; Jerry X. Mitrovica; Steven W. Hostetler; Gerhard Kuhn

2011-12-02T23:59:59.000Z

424

EERE Takes Important Steps to Ensure Maximum Impact of Technology...  

Office of Environmental Management (EM)

the clean energy economy today, developing and delivering market-driven solutions for energy-saving homes, buildings, and manufacturing; sustainable transportation; and...

425

THE MAXIMUM k-COLORABLE SUBGRAPH PROBLEM AND ...  

E-Print Network (OSTI)

It is well known that such symmetry has negative effects on the performance of branch- .... The wave length assignment problem arises in the design of optical net- works (e.g. ..... their orbits under the group action of Sk. It is not hard to see that a matrix ... The solution in the previous proof lies in the relative interior of the face...

2011-03-16T23:59:59.000Z

426

Bacteria Total Maximum Daily Load Task Force Final Report  

E-Print Network (OSTI)

Research and Development Needs 51 References 64 Appendix 1: Bacteria TMDL Task Force Members and Expert Advisors 71 Appendix 2: Models Used in Bacteria Projects 73 as Described in EPA Publications... Appendix 3: EPA Bacteria TMDL Guidelines 78 Appendix 4: State Approaches to Bacteria TMDL 88 Development Appendix 5: Comments from Expert Advisory Group 100 1 Executive Summary In September 2006, the Texas...

Jones, C. Allan; Wagner, Kevin; Di Giovanni, George; Hauck, Larry; Mott, Joanna; Rifai, Hanadi; Srinivasan, Raghavan; Ward, George; Wythe, Kathy

427

BOOK REVIEW Karin Nickelsen and Govindjee: The Maximum Quantum Yield  

E-Print Network (OSTI)

- synthesis in the green alga Chlorella. 123 Photosynth Res DOI 10.1007/s11120-011-9705-6 #12;Urbana Chlorella pyrenoidosa as the experimental system. Equally important is the fact that the majo

Govindjee

428

Nomenclature a maximum width of the cross-section m  

E-Print Network (OSTI)

, ``Effect of Channel Roughness on Heat Transfer and Fluid Flow Characteristics at Low Reynolds Numbers., 2002, ``Numerical Computation of Fluid flow and Heat Transfer in Microchannels,'' Int. J. Heat Mass Microchannels,'' Int. J. Heat Mass Transfer 43, pp. 353­364. 3 Celata, G. P., Cumo, M., Guglielmi, M., and Zummo

Roy, Subrata

429

LANDFILL OPERATION FOR CARBON SEQUESTRATION AND MAXIMUM METHANE EMISSION CONTROL  

SciTech Connect

''Conventional'' waste landfills emit methane, a potent greenhouse gas, in quantities such that landfill methane is a major factor in global climate change. Controlled landfilling is a novel approach to manage landfills for rapid completion of total gas generation, maximizing gas capture and minimizing emissions of methane to the atmosphere. With controlled landfilling, methane generation is accelerated and brought to much earlier completion by improving conditions for biological processes (principally moisture levels) in the landfill. Gas recovery efficiency approaches 100% through use of surface membrane cover over porous gas recovery layers operated at slight vacuum. A field demonstration project's results at the Yolo County Central Landfill near Davis, California are, to date, highly encouraging. Two major controlled landfilling benefits would be the reduction of landfill methane emissions to minuscule levels, and the recovery of greater amounts of landfill methane energy in much shorter times than with conventional landfill practice. With the large amount of US landfill methane generated, and greenhouse potency of methane, better landfill methane control can play a substantial role in reduction of US greenhouse gas emissions.

Don Augenstein

1999-01-11T23:59:59.000Z

430

Maximum Likelihood Estimation (MLE) of students' understanding of vector subtraction  

E-Print Network (OSTI)

and Electricity and Magnetism have been collapsed together. In this short paper, we use an easily-understood exam (Mechanics) or second quarter (Electricity and Magnetism) introductory calculus-based physics course homework assignment con- sisted of participating in a one-hour session in a physics education research lab

Zollman, Dean

431

Fitting Reduced Rank Regression Models by Alternating Maximum Likelihoods  

E-Print Network (OSTI)

Fitting longitudinal reduced rank regression models byA J . (1965). Reduced-rank regression for the multivariateFITTING LONGITUDINAL REDUCED RANK REGRESSION MODELS BY

Jan de Leeuw

2011-01-01T23:59:59.000Z

432

Maximum Norm Error Estimators For Three Dimensional Elliptic Problems  

E-Print Network (OSTI)

Bariloche, CNEA, 8400 Bariloche, Rio Negro, Argentina. y Departamento de Matem#19;atica, Facultad de Ciencias Exactas, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina. 1 #12; behaviour of the Green, error estimators for the energy norm for this method were introduced and analyzed in [7, 8, 13, 16]. Our

Duran, Ricardo

433

Research Workshop & Conference Grant (Maximum: $2,000)  

E-Print Network (OSTI)

date ________ (MM/YY) Faculty: Arts Science Theology Education Business and Administration 2. Co Peer Reviewed Conferences and Workshops (e.g., conference proceedings and posters, keynotes

Martin, Jeff

434

Maximum force production: why are crabs so strong?  

Science Journals Connector (OSTI)

...the vicinity of the Bam eld Marine Station, Bam eld, British...based on their estimated claw wear (claw index 2 as described...grant and the sta of the Bam eld Marine Station for providing research...and adaptation. Patterns of marine life. Cambridge, MA: Harvard...

2000-01-01T23:59:59.000Z

435

Maximum-Demand Rectangular Location Problem 1. Introduction  

E-Print Network (OSTI)

Sep 29, 2014 ... The basic form of MCLP [Church and ReVelle, 1974], several succeeding studies [Daskin et al., 1989, Murray and O'Kelly, 2002,. Murray et al.

2014-10-01T23:59:59.000Z

436

Efficiency of some heat engines at maximum?power conditions  

Science Journals Connector (OSTI)

In the present paper a simple model is presented for a heat engine where the power output is limited by the rate of heat supply (and/or heat release). The model leads to a variety of results. Some of them are established laws such as the Carnot law the CurzonAhlborn efficiency and the Castas efficiency. Other results are new and are related to phenomena as different as geothermal energy conversion and the Penfield paradox of electric circuits.

Alexis De Vos

1985-01-01T23:59:59.000Z

437

Facets for the Maximum Common Induced Subgraph Problem ...  

E-Print Network (OSTI)

such that (i, j) ? E ? (?(i),?(j)) ? F and (i, j) ? F ? (??1(i),??1(j)) ? E. Besides, given a graph G ... therefore, there are n + 1 afine independent vectors (where n is the number of variables in the model). ...... [4] M. R. Garey and D. S. Johnson.

2011-09-02T23:59:59.000Z

438

Biologically Plausible Neural Circuits for Realization of Maximum Operations  

E-Print Network (OSTI)

Object recognition in the visual cortex is based on a hierarchical architecture, in which specialized brain regions along the ventral pathway extract object features of increasing levels of complexity, accompanied by greater ...

Yu, Angela J.

2001-09-01T23:59:59.000Z

439

Oxidation State Optimization for Maximum Efficiency of NOx Adsorber...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Directions in Engine-Efficiency and Emissions Research (DEER) Conference in Detroit, MI, September 27-30, 2010. deer10li.pdf More Documents & Publications Lean NOx Trap...

440

Oxidation State Optimization for Maximum Efficiency of NOx Adsorber Catalysts  

Energy.gov (U.S. Department of Energy (DOE))

Presentation given at the 16th Directions in Engine-Efficiency and Emissions Research (DEER) Conference in Detroit, MI, September 27-30, 2010.

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

The Maximum Flow Network Interdiction Problem: Valid Inequalities ...  

E-Print Network (OSTI)

H. Milton Stewart School of Industrial and Systems Engineering, Georgia Institute of Technology,. 765 Ferst Drive ... 315 N. Grant Street, West Lafayette, Indiana 47907, nuhan@purdue.edu. ...... Mathematical and Computer Modelling, 17: 1

2009-05-03T23:59:59.000Z

442

Efficiency Improvement of an IPMSM using Maximum Efficiency Operating Strategy  

E-Print Network (OSTI)

, Joachim Böcker Paderborn University Department of Power Electronics and Electrical Drives 33095 Paderborn ma- chines (IPMSM) are preferably used for traction drives in electric vehicles in the machine control. Keywords-- Automotive application, Control of Drive, Electrical Drive, Efficiency

Paderborn, Universität

443

Optimal Neighborhood Preserving Visualization by Maximum Satisfiability Kerstin Bunte  

E-Print Network (OSTI)

University Finland Matti J¨arvisalo HIIT, University of Helsinki Finland Jeremias Berg HIIT, University of Helsinki Finland Petri Myllym¨aki HIIT, University of Helsinki Finland Jaakko Peltonen University of Tampere, Finland HIIT, Aalto University, Finland Samuel Kaski HIIT, Aalto University, University

Kaski, Samuel

444

Maximum Entry and Mandatory Separation Ages for Certain Security Employees  

Directives, Delegations, and Requirements

The Policy in response to government-wide Office of Personnel Management regulations regarding establishment of mandatory retirement ages for employees in certain security related positions. Superseded by DOE P 310.1 Admin Chg 1, 12-1-11.

2001-10-11T23:59:59.000Z

445

Maximum Attainable Drag Limits for Atmospheric Entry via Supersonic Retropropulsion  

E-Print Network (OSTI)

entry through a flow control approach which increases aerodynamic drag, based on SRP jet manipulation-fidelity simulations of SRP jets. These flow models use SRP jets to recover shock losses normally associated if only a modicum of the stagnation pressure losses can be recovered through SRP flow control. Finally

Alonso, Juan J.

446

Maximum likelihood tting using ordinary least squares algorithms  

E-Print Network (OSTI)

. Sidiropoulos2 and Age K. Smilde3 1 Chemometrics Group, Food Technology, Department of Dairy and Food Science no distributional assumptions are valid (or applied) on the parameters. The algorithm may also more generally homoscedastic, the different magnitudes of different errors can be handled by using weighted least squares

Sidiropoulos, Nikolaos D.

447

Maximum-principle-satisfying high order finite volume WENO ...  

E-Print Network (OSTI)

3Department of Mathematics, University of Science and Technology of China, Hefei, Anhui 230026, ...... Procedure 5: Apply Procedure 1 at twelve points x?.

2014-05-05T23:59:59.000Z

448

Fitting Reduced Rank Regression Models by Alternating Maximum Likelihoods  

E-Print Network (OSTI)

to use a new blood sphygmomanometer, at '+ diureticum' thewas high. The new sphygmomanometer gives a considerable

Jan de Leeuw

2011-01-01T23:59:59.000Z

449

Fitting Reduced Rank Regression Models by Alternating Maximum Likelihoods  

E-Print Network (OSTI)

to use a new blood sphygmomanometer, at '+ diureticum' thewas high. The new sphygmomanometer gives a considerable

Leeuw, Jan de

1991-01-01T23:59:59.000Z

450

Asymptotics for the maximum likelihood estimators of diffusion models  

E-Print Network (OSTI)

. Background Consider the time-homogeneous stochastic difierential equation dXt = ?(Xt;fi)dt+ (Xt;fl)dWt (2.1) where ? and are the drift and difiusion functions, respectively. I will denote = (fi0;fl0)0 hereafter. I let D = (x; ?x) denotes the domain... of the difiusion process Xt. The Euler approximation of this SDE is Xi? ?X(i?1)? ? ?(X(i?1)?)?+ (X(i?1)?)(Wi? ?W(i?1)?) and the closed-form solution of this approximated transition density from x to y with an interval ? is given by pE(x;y) = 1p2?? (x) exp ? ? ?y ?x...

Jeong, Minsoo

2009-05-15T23:59:59.000Z

451

annual maximum extent: Topics by E-print Network  

NLE Websites -- All DOE Office Websites (Extended Search)

Report 2010Annual Report Engineering Websites Summary: 2010Annual Report 2010Annual Report 2010Annual Report 2010 Annual Report Technology Transfer Office Assistant Vice...

452

Maximum entropy production in environmental and ecological systems  

Science Journals Connector (OSTI)

...practical level, the MEP principle could pave the way for better and more theoretically grounded parameterizations in Earth system models of different complexities. Here, MEP would play a critical role in scaling spatial heterogeneities and temporal...

2010-01-01T23:59:59.000Z

453

Confidence regions for maximum response and associated design optimization  

E-Print Network (OSTI)

BECAUSE I GF IRREGULAR (TIES IN THE DATA ) GO TG 1 6 STOP END SUBROUTINE iVEWT (ApB&C yD&E pXp I pN) 060 010 C C C C C C C C C C C C C C C C 1 2 10 15 20 25 26 30 h I S 4 U. '. Clfr, =!~SICNAL ARRAY CF COEFFICIENTS. 8 I 5 TIJ...65?60 R 1=R5 GO TO 53 I=I+1 X( I)=85 GO TO 15 RETURN ENO SUBROUTINE SUBRTl (NgM?NM&Ct 8 ~ XKy Al) 380 390 400 410 420 430 440 450 460 470 480 490 500 510 520 530 540 550 560 570 580 590 600 610 THIS SUBRCUTINE SETS UP...

Hartmann, Norbert Alfred

2012-06-07T23:59:59.000Z

454

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network (OSTI)

Potential Uses for Depleted Uranium Oxide. 2009, DOE. p.15. WNA. Uranium and Depleted Uranium. 2009 [cited 2010R. , Direct Use of Depleted Uranium As Fuel in a Traveling-

Heidet, Florent

2010-01-01T23:59:59.000Z

455

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network (OSTI)

Physics Optimization of Breed and Burn Fast Reactor Systems.reactors: Fabrication and properties and their optimization.

Heidet, Florent

2010-01-01T23:59:59.000Z

456

Maximum power point tracker for solar arrays using controlled rectifier.  

E-Print Network (OSTI)

??M.S. Solar energy offers a large potential as a source of energy and in light of financial and ethical reasons, people are looking to harvest (more)

Manadan, Anvin Joe, 1987-

2012-01-01T23:59:59.000Z

457

Solar Tracing Sensors for Maximum Solar Concentrator Efficiency  

Concentrating Solar Power (CSP) relies on thermodynamic processes to convert concentrated light into useful forms of energy. Accurate sun tracking enables higher concentration ratios and improved efficiency through higher temperature processes and lower losses...

2013-03-12T23:59:59.000Z

458

Reducing Inconsistencies in Point Observations of Maximum Flood Inundation Level  

Science Journals Connector (OSTI)

Flood simulation models and hazard maps are only as good as the underlying data against which they are calibrated and tested. However, extreme flood events are by definition rare, so the observational data of flood inundation extent are limited in ...

Brandon L. Parkes; Hannah L. Cloke; Florian Pappenberger; Jeff Neal; David Demeritt

2013-08-01T23:59:59.000Z

459

A computer program for maximum likelihood estimation of variance components  

E-Print Network (OSTI)

IF(L( +EQ ~ NOVMAX)GO TO 32 GO TO 28 300 I 0000 91 00 9002 9003 9020 9010 CALI FILF(7t I ) WR f TE(7) (UPY ( J) t J?1 t NSAV ) WRITE(7) (XPY(I ) ~ I?1 ~ IXCOL) WRfTF(7) (IXPRMX( J) t J?l tKJ) END F I LE 7 END FILE 3 WRITE(3) (Y(1)tl?1... IF(L( +EQ ~ NOVMAX)GO TO 32 GO TO 28 300 I 0000 91 00 9002 9003 9020 9010 CALI FILF(7t I ) WR f TE(7) (UPY ( J) t J?1 t NSAV ) WRITE(7) (XPY(I ) ~ I?1 ~ IXCOL) WRfTF(7) (IXPRMX( J) t J?l tKJ) END F I LE 7 END FILE 3 WRITE(3) (Y(1)tl?1...

Hays, John Howard

2012-06-07T23:59:59.000Z

460

A maximum entropy framework for non-exponential distributions  

E-Print Network (OSTI)

Probability distributions having power-law tails are observed in a broad range of social, economic, and biological systems. We describe here a potentially useful common framework. We derive distribution functions $\\{p_k\\}$ for situations in which a `joiner particle' $k$ pays some form of price to enter a `community' of size $k-1$, where costs are subject to economies-of-scale (EOS). Maximizing the Boltzmann-Gibbs-Shannon entropy subject to this energy-like constraint predicts a distribution having a power-law tail; it reduces to the Boltzmann distribution in the absence of EOS. We show that the predicted function gives excellent fits to 13 different distribution functions, ranging from friendship links in social networks, to protein-protein interactions, to the severity of terrorist attacks. This approach may give useful insights into when to expect power-law distributions in the natural and social sciences.

Peterson, Jack; Dill, Ken A

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

BRANCH-CUT-AND-PROPAGATE FOR THE MAXIMUM k ...  

E-Print Network (OSTI)

Annals of Mathematics and Artificial Intelligence, 57(1):3757, 2009. [12] F. V. Fomin, F. Grandoni, and D. Kratsch. A measure & conquer approach for the.

2011-03-16T23:59:59.000Z

462

MaximumA Posteriori Estimation of Transient Enhanced Diffusion Energetics  

E-Print Network (OSTI)

into the wafer. However, ion implantation causes lattice damage, producing junctions with high sheet resistance. 2000 . Here, a comprehensive TED model is developed combin- Zing elementary physicochemical processes continuity equations describing Fickian diffusion and electric drift motion, and formation and Zannihilation

Braatz, Richard D.

463

Maximum-principle-satisfying and positivity-preserving high order ...  

E-Print Network (OSTI)

pressure, e is the internal energy, and ? > 1 is a constant (? = 1.4 for the air). ...... Example 6.5 The vortex patch problem in the domain [0,2?][0,2?] with periodic ..... [16] H. Schardin, High frequency cinematography in the shock tube, Journal of

2014-05-05T23:59:59.000Z

464

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network (OSTI)

According to the DOE handbook [57], a shutdown margin largerp. 812. Not, A. , DOE fundamentals handbook: Nuclear physics

Heidet, Florent

2010-01-01T23:59:59.000Z

465

Monthly Number of Days for Maximum Temperature - Hanford Site  

NLE Websites -- All DOE Office Websites (Extended Search)

Station Real Time Met Data from Around the Site Current HMS Observations Daily HMS Extremes in Met Data Met and Climate Data Summary Products Historical Weather Charts Contacts...

466

Structural Models of Corporate Bond Pricing with Maximum Likelihood  

E-Print Network (OSTI)

-mail: jefferykaleungli@hsbc.com.hk; Ka Leung Li is at the Department of Credit Risk Management in HSBC, Hong Kong

Chaudhuri, Sanjay

467

On globally solving the maximum weighted clique problem  

E-Print Network (OSTI)

(?1() is defined as the smallest eigen value of matrix ) we obtain an equivalent ... where g and h are lower semi-continuous proper convex functions on IRn.

2014-12-01T23:59:59.000Z

468

14 Applications of the Maximum Principle We discuss the terminal conditions of the maximum principle and further examples of  

E-Print Network (OSTI)

by the variable t. We then have the augmented variables x x t a a 1 0 . We keep the same definition (13.2 Example: monopolist Miss Prout holds the entire remaining stock of Cambridge elderberry wine for the vintage year 1959. If she releases it at rate u (in continuous time) she realises a unit price p(u) = (1

Weber, Richard

469

Safety and Efficacy of Prehospital Diltiazem  

E-Print Network (OSTI)

HR was ,100 beats per minute (bpm) or if it decreased 20%.The average initial HR was 154 bpm. On arrival to theof the patients had an HR , 100 bpm and 69% had a drop in HR

Luk, Jeffrey H; Walsh, Brian; Yasbin, Paul

2013-01-01T23:59:59.000Z

470

New Efficiency Record Achieved for White OLED Device  

Energy.gov (U.S. Department of Energy (DOE))

Osram Opto-Semiconductors, Inc. has successfully demonstrated a white organic light emitting diode (OLED) with a record efficiency of 25 lumens per watt, the highest known efficiency achieved to date for a polymer-based white OLED. The 25 LPW cool-white-emitting device was produced by applying a standard external inorganic phosphor to Osram's record-breaking blue-emitting phosphorescent polymer device with a peak luminous efficacy of 14 LPW.

471

Supplementary Methods The stimuli were displayed on a high-resolution color monitor. Background luminance was set to  

E-Print Network (OSTI)

, resulting in 1.1-cpd. The orientation was magnified according to the orientation threshold function3 : TH = 0.257º [1+14.5'L­1(1+E/1.95º)]2 where TH refers to the orientation threshold, L­1 is the inverse

Carrasco, Marisa

472

Origin of Ne Emission Line of Very Luminous Soft X-ray Transient MAXI J0158$-$744  

E-Print Network (OSTI)

We investigate the mechanism to reproduce notable spectral features at the ignition phase of nova explosion observed for a super-Eddington X-ray transient source MAXI J0158$-$744 in the Small Magellanic Cloud. These are a strong Ne IX emission line at 0.92 keV with a large equivalent width of $0.32^{+0.21}_{-0.11}$ keV and the absence of Ne X line at 1.02 keV. In this paper, we calculate the radiative transfer using a Monte Carlo code, taking into account the line blanketing effect due to transitions of N, O, Ne, Mg and Al ions in an accelerating wind emanating from a white dwarf with a structure based on a spherically symmetric stationary model. We found that the strong Ne IX line can be reproduced if the mass fraction of Ne is enhanced to $10^{-3}$ or more and that of O is reduced to $\\sim5\\times10^{-9}$ or less and that the absence of other lines including Ne X ions at higher energies can be also reproduced by the line blanketing effect. This enhancement of the Ne mass fraction indicates that the ejecta ar...

Ohtani, Yukari; Shigeyama, Toshikazu

2014-01-01T23:59:59.000Z

473

A massive, cooling-flow-induced starburst in the core of a highly luminous cluster of galaxies  

E-Print Network (OSTI)

In the cores of some clusters of galaxies the hot intracluster plasma is dense enough that it should cool radiatively in the clusters lifetime, leading to continuous cooling flows of gas sinking towards the cluster ...

McDonald, Michael A.

474

Distinct Luminal-Type Mammary Carcinomas Arise from Orthotopic Trp53-Null Mammary Transplantation of Juvenile versus Adult Mice  

Science Journals Connector (OSTI)

...Program, funding from the Department of Energy, Office of Biological and Environmental...1049-56. 2. Rakha EA , El-Sayed ME, Green AR, Lee AH, Robertson JF Ellis IO.Prognostic...Elsheikh SE, Aleskandarany MA, Habashi HO, Green AR, Powe DG, et alTriple-negative breast...

David H. Nguyen; Haoxu Ouyang; Jian-Hua Mao; Lynn Hlatky; and Mary Helen Barcellos-Hoff

2014-12-01T23:59:59.000Z

475

The XMM-LSS Survey: Mapping hot, luminous, obscured and dark material out to z~1-2  

E-Print Network (OSTI)

We review the unique cosmological implications of the XMM-LSS survey in association with its multi-WL follow-up: (1) Large Scale Structures traced by X-ray clusters and AGNs, optical galaxies, weak lensing as well as Sunyaev-Zel'dovich effect; (2) location of IR star forming galaxies and IR (obscured) AGNs within the cosmic web. The XMM/MegaCam/VIRMOS/SIRTF data base will provide the first comprehensive study of structure formation - from hundreds of Mpc to galaxy scale - in close connection with environmental processes.

Marguerite Pierre

2001-11-13T23:59:59.000Z

476

XMM-NEWTON FINDS THAT SAX J1750.8-2900 MAY HARBOR THE HOTTEST, MOST LUMINOUS KNOWN NEUTRON STAR  

SciTech Connect

We have performed the first sensitive X-ray observation of the low-mass X-ray binary (LMXB) SAX J1750.8-2900 in quiescence with XMM-Newton. The spectrum was fit to both a classical blackbody model, and a non-magnetized, pure hydrogen neutron star (NS) atmosphere model. A power-law component was added to these models, but we found that it was not required by the fits. The distance to SAX J1750.8-2900 is known to be D = 6.79 kpc from a previous analysis of photospheric radius expansion bursts. This distance implies a bolometric luminosity (as given by the NS atmosphere model) of (1.05 {+-} 0.12) Multiplication-Sign 10{sup 34} (D/6.79 kpc){sup 2} erg s{sup -1}, which is the highest known luminosity for a NS LMXB in quiescence. One simple explanation for this surprising result could be that the crust and core of the NS were not in thermal equilibrium during the observation. We argue that this was likely not the case, and that the core temperature of the NS in SAX J1750.8-2900 is unusually high.

Lowell, A. W.; Tomsick, J. A.; Bodaghee, A.; Boggs, S. E. [Space Sciences Laboratory, 7 Gauss Way, University of California, Berkeley, CA 94720-7450 (United States); Heinke, C. O. [Department of Physics, University of Alberta, Room 238 CEB, Edmonton, AB T6G 2G7 (Canada); Kaaret, P. [Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242 (United States); Chaty, S.; Rodriguez, J. [AIM-Astrophysique Instrumentation Modelisation (UMR 7158 CEA/CNRS/Universite Paris 7 Denis Diderot), CEA Saclay, DSM/IRFU/Service d'Astrophysique, Bat. 709, L'Orme des Merisiers, FR-91 191 Gif-sur-Yvette Cedex (France); Walter, R., E-mail: alowell@ssl.berkeley.edu [INTEGRAL Science Data Centre, Observatoire de Geneve, Universite de Geneve, Chemin d'Ecogia, 16, 1290 Versoix (Switzerland)

2012-04-20T23:59:59.000Z

477

The WiggleZ Dark Energy Survey: high-resolution kinematics of luminous star-forming galaxies  

Science Journals Connector (OSTI)

......research-article Papers The WiggleZ Dark Energy Survey: high-resolution kinematics...galaxies selected from the WiggleZ Dark Energy Survey. Selected via ultraviolet and...surveys, such as the WiggleZ Dark Energy Survey. The WiggleZ survey contains......

Emily Wisnioski; Karl Glazebrook; Chris Blake; Ted Wyder; Chris Martin; Gregory B. Poole; Rob Sharp; Warrick Couch; Glenn G. Kacprzak; Sarah Brough; Matthew Colless; Carlos Contreras; Scott Croom; Darren Croton; Tamara Davis; Michael J. Drinkwater; Karl Forster; David G. Gilbank; Michael Gladders; Ben Jelliffe; Russell J. Jurek; I-hui Li; Barry Madore; Kevin Pimbblet; Michael Pracy; David Woods; H. K. C. Yee

2011-11-11T23:59:59.000Z

478

DOE Publishes GATEWAY Report on High-Luminous-Flux LED Lighting in a High-Temperature Environment  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Department of Energy has released a GATEWAY report on a trial demonstration in which the incumbent quartz metal halide (QMH) area lighting was replaced with LED at three pole locations...

479

Near-infrared evolution of brightest cluster galaxies in the most X-ray luminous clusters since z=1  

E-Print Network (OSTI)

We investigate the near infrared evolution of brightest cluster galaxies (BCGs) from a sample of rich galaxy clusters since z=1. By employing an X-ray selection of Lx>1e44 erg s-1 we limit environmental effects by selecting BCGs in comparably high density regions. We find a positive relationship between X-ray and near-infrared luminosity for BCGs in clusters with Lx>5e44 erg s-1. Applying a correction for this relation we reduce the scatter in the BCG absolute magnitude by a factor of 30%. The near-infrared J-K colour evolution demonstrates that the stellar population in BCGs has been in place since at least z=2 and that we expect a shorter period of star formation than that predicted by current hierarchical merger models. We also confirm that there is a relationship between `blue' J-K colour and the presence of BCG emission lines associated with star formation in cooling flows.

J. P. Stott; A. C. Edge; G. P. Smith; A. M. Swinbank; H. Ebeling

2007-12-04T23:59:59.000Z

480

THE DENSITY PROFILES OF MASSIVE, RELAXED GALAXY CLUSTERS. II. SEPARATING LUMINOUS AND DARK MATTER IN CLUSTER CORES  

SciTech Connect

We present stellar and dark matter (DM) density profiles for a sample of seven massive, relaxed galaxy clusters derived from strong and weak gravitational lensing and resolved stellar kinematic observations within the centrally located brightest cluster galaxies (BCGs). In Paper I of the series, we demonstrated that the total density profile derived from these data, which span three decades in radius, is consistent with numerical DM-only simulations at radii {approx}> 5-10 kpc, despite the significant contribution of stellar material in the core. Here, we decompose the inner mass profiles of these clusters into stellar and dark components. Parameterizing the DM density profile as a power law {rho}{sub DM}{proportional_to}r {sup -{beta}} on small scales, we find a mean slope ({beta}) = 0.50 {+-} 0.10(random){sup +0.14} {sub -0.13}(systematic). Alternatively, cored Navarro-Frenk-White (NFW) profiles with (log r {sub core}/kpc) = 1.14 {+-} 0.13{sup +0.14} {sub -0.22} provide an equally good description. These density profiles are significantly shallower than canonical NFW models at radii {approx}< 30 kpc, comparable to the effective radii of the BCGs. The inner DM profile is correlated with the distribution of stars in the BCG, suggesting a connection between the inner halo and the assembly of stars in the central galaxy. The stellar mass-to-light ratio inferred from lensing and stellar dynamics is consistent with that inferred using stellar population synthesis models if a Salpeter initial mass function is adopted. We compare these results to theories describing the interaction between baryons and DM in cluster cores, including adiabatic contraction models and the possible effects of galaxy mergers and active galactic nucleus feedback, and evaluate possible signatures of alternative DM candidates.

Newman, Andrew B.; Ellis, Richard S. [Cahill Center for Astronomy and Astrophysics, California Institute of Technology, MS 249-17, Pasadena, CA 91125 (United States)] [Cahill Center for Astronomy and Astrophysics, California Institute of Technology, MS 249-17, Pasadena, CA 91125 (United States); Treu, Tommaso; Sand, David J., E-mail: anewman@astro.caltech.edu [Department of Physics, University of California, Santa Barbara, CA 93106 (United States)

2013-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "maximum luminous efficacy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Structure of columns in monkey striate cortex induced by luminant-contrast and color-contrast stimulation  

Science Journals Connector (OSTI)

...6, 7) reported columns induced by oscillating B/W, vertically oriented stripes which...superimpose the density outlines of a string of columns generated by B/W stimulation...magnification they appear as beads on a string- i.e., periodic densities along...

M L Crawford; L S Meharg; D A Johnston

1982-01-01T23:59:59.000Z

482

Heart mass and the maximum cardiac output of birds and mammals: implications for estimating the maximum aerobic power input of flying animals  

Science Journals Connector (OSTI)

...due to the intrinsic interest of studying car- diovascular adaptation to changes in...expenditure from heart rate and doubly-labeled water in exercising geese. Ph s. ool. 65...1968 Respiratory exchange and evaporative water loss in the flying budgerigar. . Exp...

1997-01-01T23:59:59.000Z

483

Biocidal Efficacy of a Flocculating Emergency Water Purification Tablet  

Science Journals Connector (OSTI)

...of a Flocculating Emergency Water Purification Tablet Edmund M. Powers 1...Chlor-Floc (CF) emergency water purification tablets were tested for bactericidal...requirements for emergency water purification and are safe and acceptable...

Edmund M. Powers; C. Hernandez; S. N. Boutros; B. G. Harper

1994-07-01T23:59:59.000Z

484

Tumor localization and antitumor efficacy of novel sapphyrin compounds  

Science Journals Connector (OSTI)

...expanded porphyrins with potential medical use in a variety of areas...cells was done under subdued lighting and sapphyrin-treated cells...sapphyrins, have potential medical use, including in the area...Synthetic materials with potential medical utility. Pure Appl Chem 1999...

Louie Naumovski; Mint Sirisawad; Philip Lecane; Jun Chen; Jason Ramos; Zhong Wang; Cecilia Cortez; Darren Magda; Patti Thiemann; Garry Boswell; Dale Miles; Dong Gyu Cho; Jonathan L. Sessler; and Richard Miller

2006-11-01T23:59:59.000Z

485

Tumor localization and antitumor efficacy of novel sapphyrin compounds  

Science Journals Connector (OSTI)

...Texas TD T program. The costs of publication of this...porphyrins with potential medical use as anticancer agents...porphyrins with potential medical use in a variety of areas...was done under subdued lighting and sapphyrin-treated...sapphyrins, have potential medical use, including in the...

Louie Naumovski; Mint Sirisawad; Philip Lecane; Jun Chen; Jason Ramos; Zhong Wang; Cecilia Cortez; Darren Magda; Patti Thiemann; Garry Boswell; Dale Miles; Dong Gyu Cho; Jonathan L. Sessler; and Richard Miller

2006-11-01T23:59:59.000Z

486

The Efficacy of Radiotherapy in the Treatment of Orbital Pseudotumor  

SciTech Connect

Purpose: To review institutional outcomes for patients treated with external-beam radiotherapy (EBRT) for orbital pseudotumor. Methods and Materials: This is a single-institution retrospective review of 20 orbits in 16 patients diagnosed with orbital pseudotumor that received EBRT at the University of Oklah