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Sample records for near normal tropical

  1. A method for estimating direct normal solar irradiation from satellite data for a tropical environment

    SciTech Connect (OSTI)

    Janjai, Serm

    2010-09-15

    In order to investigate a potential use of concentrating solar power technologies and select an optimum site for these technologies, it is necessary to obtain information on the geographical distribution of direct normal solar irradiation over an area of interest. In this work, we have developed a method for estimating direct normal irradiation from satellite data for a tropical environment. The method starts with the estimation of global irradiation on a horizontal surface from MTSAT-1R satellite data and other ground-based ancillary data. Then a satellite-based diffuse fraction model was developed and used to estimate the diffuse component of the satellite-derived global irradiation. Based on this estimated global and diffuse irradiation and the solar radiation incident angle, the direct normal irradiation was finally calculated. To evaluate its performance, the method was used to estimate the monthly average hourly direct normal irradiation at seven pyrheliometer stations in Thailand. It was found that values of monthly average hourly direct normal irradiation from the measurements and those estimated from the proposed method are in reasonable agreement, with a root mean square difference of 16% and a mean bias of -1.6%, with respect to mean measured values. After the validation, this method was used to estimate the monthly average hourly direct normal irradiation over Thailand by using MTSAT-1R satellite data for the period from June 2005 to December 2008. Results from the calculation were displayed as hourly and yearly irradiation maps. These maps reveal that the direct normal irradiation in Thailand was strongly affected by the tropical monsoons and local topography of the country. (author)

  2. Water vapor and temperature inversions near the 0 deg C level over the tropical western Pacific. Master's thesis

    SciTech Connect (OSTI)

    Hart, K.A.

    1994-01-01

    During the Intensive Observation Period (IOP), several periods of water vapor and temperature inversions near the 0 deg C level were observed. Satellite and radiosonde data from TOGA COARE are used to document the large-scale conditions and thermodynamic and kinematic structures present during three extended periods in which moisture and temperature inversions near the freezing level were very pronounced. Observations from each case are synthesized into schematics which represent typical structures of the inversion phenomena. Frequency distributions of the inversion phenomena along with climatological humidity and temperature profiles are calculated for the four-month IOP.

  3. Local tunneling characteristics near a grain boundary of a d-wave superconductor as probed by a normal-metal or a low-Tc-superconductor STM tip 

    E-Print Network [OSTI]

    Zhao, Hongwei

    2005-08-29

    We studied the local single-particle tunneling characteristics [as observed with scanning tunnel microscopy (STM)] for N D and S D tunneling, where N is a normal metal, S is a s-wave superconductor, and D is a d-wave ...

  4. Normal Distribution

    E-Print Network [OSTI]

    User

    NORMAL DlSTRlBUTION TABLE. Entries represent the area under the standardized normal distribution from -w to z, Pr(Z

  5. CHARACTERIZATION OF CLOUDS IN TITAN'S TROPICAL ATMOSPHERE

    SciTech Connect (OSTI)

    Griffith, Caitlin A.; Penteado, Paulo; Rodriguez, Sebastien; Baines, Kevin H.; Buratti, Bonnie; Sotin, Christophe; Clark, Roger; Nicholson, Phil; Jaumann, Ralf

    2009-09-10

    Images of Titan's clouds, possible over the past 10 years, indicate primarily discrete convective methane clouds near the south and north poles and an immense stratiform cloud, likely composed of ethane, around the north pole. Here we present spectral images from Cassini's Visual Mapping Infrared Spectrometer that reveal the increasing presence of clouds in Titan's tropical atmosphere. Radiative transfer analyses indicate similarities between summer polar and tropical methane clouds. Like their southern counterparts, tropical clouds consist of particles exceeding 5 {mu}m. They display discrete structures suggestive of convective cumuli. They prevail at a specific latitude band between 8 deg. - 20 deg. S, indicative of a circulation origin and the beginning of a circulation turnover. Yet, unlike the high latitude clouds that often reach 45 km altitude, these discrete tropical clouds, so far, remain capped to altitudes below 26 km. Such low convective clouds are consistent with the highly stable atmospheric conditions measured at the Huygens landing site. Their characteristics suggest that Titan's tropical atmosphere has a dry climate unlike the south polar atmosphere, and despite the numerous washes that carve the tropical landscape.

  6. The frequency of tropical precipitating clouds as observed by the TRMM PR and ICESat/GLAS 

    E-Print Network [OSTI]

    Casey, Sean Patrick

    2009-06-02

    Convective clouds in the tropics can be grouped into three categories: shallow clouds with cloud-top heights near 2 km above the surface, mid-level congestus clouds with tops near the 0°C level, and deep convective clouds ...

  7. Ocean Barrier Layers’ Effect on Tropical Cyclone Intensification

    SciTech Connect (OSTI)

    Balaguru, Karthik; Chang, P.; Saravanan, R.; Leung, Lai-Yung R.; Xu, Zhao; Li, M.; Hsieh, J.

    2012-09-04

    Improving a tropical cyclone's forecast and mitigating its destructive potential requires knowledge of various environmental factors that influence the cyclone's path and intensity. Herein, using a combination of observations and model simulations, we systematically demonstrate that tropical cyclone intensification is significantly affected by salinity-induced barrier layers, which are 'quasi-permanent' features in the upper tropical oceans. When tropical cyclones pass over regions with barrier layers, the increased stratification and stability within the layer reduce storm-induced vertical mixing and sea surface temperature cooling. This causes an increase in enthalpy flux from the ocean to the atmosphere and, consequently, an intensification of tropical cyclones. On average, the tropical cyclone intensification rate is nearly 50% higher over regions with barrier layers, compared to regions without. Our finding, which underscores the importance of observing not only the upper-ocean thermal structure but also the salinity structure in deep tropical barrier layer regions, may be a key to more skillful predictions of tropical cyclone intensities through improved ocean state estimates and simulations of barrier layer processes. As the hydrological cycle responds to global warming, any associated changes in the barrier layer distribution must be considered in projecting future tropical cyclone activity.

  8. THE SPITZER MID-INFRARED ACTIVE GALACTIC NUCLEUS SURVEY. I. OPTICAL AND NEAR-INFRARED SPECTROSCOPY OF OBSCURED CANDIDATES AND NORMAL ACTIVE GALACTIC NUCLEI SELECTED IN THE MID-INFRARED

    SciTech Connect (OSTI)

    Lacy, M.; Ridgway, S. E.; Gates, E. L.; Petric, A. O.; Sajina, A.; Urrutia, T.; Cox Drews, S.; Harrison, C.; Seymour, N.; Storrie-Lombardi, L. J.

    2013-10-01

    We present the results of a program of optical and near-infrared spectroscopic follow-up of candidate active galactic nuclei (AGNs) selected in the mid-infrared. This survey selects both normal and obscured AGNs closely matched in luminosity across a wide range, from Seyfert galaxies with bolometric luminosities L {sub bol} ? 10{sup 10} L {sub ?} to highly luminous quasars (L {sub bol} ? 10{sup 14} L {sub ?}), all with redshifts ranging from 0 to 4.3. Samples of candidate AGNs were selected with mid-infrared color cuts at several different 24 ?m flux density limits to ensure a range of luminosities at a given redshift. The survey consists of 786 candidate AGNs and quasars, of which 672 have spectroscopic redshifts and classifications. Of these, 137 (20%) are type 1 AGNs with blue continua, 294 (44%) are type 2 objects with extinctions A{sub V} ?> 5 toward their AGNs, 96 (14%) are AGNs with lower extinctions (A{sub V} ? 1), and 145 (22%) have redshifts, but no clear signs of AGN activity in their spectra. Of the survey objects 50% have L {sub bol} > 10{sup 12} L {sub ?}, in the quasar regime. We present composite spectra for type 2 quasars and objects with no signs of AGN activity in their spectra. We also discuss the mid-infrared—emission-line luminosity correlation and present the results of cross correlations with serendipitous X-ray and radio sources. The results show that: (1) obscured objects dominate the overall AGN population, (2) mid-infrared selected AGN candidates exist which lack AGN signatures in their optical spectra but have AGN-like X-ray or radio counterparts, and (3) X-ray and optical classifications of obscured and unobscured AGNs often differ.

  9. Climate and the Tropical Atlantic

    E-Print Network [OSTI]

    Climate and the Tropical Atlantic Presenter: Rick Lumpkin AOML Program Review 4-6 March 2014 What drives Tropical Atlantic climate changes and what are their impacts? #12;AOML Program Review2 Climate and the Tropical Atlantic Why this matters to NOAA and to society: Climate variability in the Tropical Atlantic

  10. CIGUATERA: TROPICAL FISH POISONING

    E-Print Network [OSTI]

    CIGUATERA: TROPICAL FISH POISONING Marine Biological I · ·' iw« L I B R >*· ** Y JUL 3 -1350 WOODS POISONING By William Arcisz, Bacteriologist, Formerly with the Fishery Research Laboratory Branch in which Fish Poisoning is Prevalento........... 3 Symptoms of Ciguatera ...... 00

  11. Geographical distribution and interseasonal variability of tropical deep convection: UARS MLS observations and analyses

    E-Print Network [OSTI]

    Wang, Bin

    of water vapor maxima near the bottom of TTL are located directly above the deep convection centersGeographical distribution and interseasonal variability of tropical deep convection: UARS MLS December 2003; published 13 February 2004. [1] Tropical deep convection and its dynamical effect

  12. Interval eigenproblem in tropical and fuzzy algebra Tolerance eigenproblem in tropical algebra

    E-Print Network [OSTI]

    Mitchener, Paul

    Interval eigenproblem in tropical and fuzzy algebra Tolerance eigenproblem in tropical algebra Tolerance eigenproblem in fuzzy algebra Tolerance interval eigenvectors in tropical and fuzzy algebra Martin Workshop Birmingham, May 16, 2013 #12;Interval eigenproblem in tropical and fuzzy algebra Tolerance

  13. Geography 102, Spring 2007 Tropical Climatology

    E-Print Network [OSTI]

    Office: Bunche Hall 1176 Phone: 206-4590/825-1071, email:raphael@geog.ucla.edu Office Hours: M/W 10:30p the development of Tropical Cli- mates - the laws that govern the movement of air; solar radiation in the Tropics in the Tropics - the Hadley Cells, the Trade Winds, the InterTropical Convergence Zone, the Tropical ocean

  14. Normal, Not Paracompact Spaces

    E-Print Network [OSTI]

    Fleissner, William G.

    1982-07-01

    We describe some recently constructed counterexamples in general topology, including a normal, nonmetrizable Moore space, a normal para-Lindelof, not paracompact space, and a normal, screenable, not paracompact space....

  15. Effects of tropical cyclones on large-scale circulation and ocean heat transport in the South China Sea

    E-Print Network [OSTI]

    suggests that effects of TC can penetrate deeper into the ocean. This deep effect may result from the nearEffects of tropical cyclones on large-scale circulation and ocean heat transport in the South China the influence of tropical cyclones (TCs) on large-scale circulation and ocean heat transport in the South China

  16. Are tropical forests near a high temperature threshold?

    E-Print Network [OSTI]

    Doughty, Christopher E.; Goulden, Michael L.

    2008-01-01

    evaporative demand and Vapor Pressure Deficit (VPD) andslope of the saturation vapor pressure deficit curve (Pa Ka change in vapor pressure deficit or relative humidity

  17. The Role of Wave Energy Accumulation in Tropical Cyclogenesis over the Tropical North Atlantic

    E-Print Network [OSTI]

    Webster, Peter J.

    The Role of Wave Energy Accumulation in Tropical Cyclogenesis over the Tropical North Atlantic "wave energy"). Relative vorticity increases locally leading to an increase in the likelihood scales of interaction. The importance of wave energy accumulation for tropical cyclogenesis

  18. Tropical bases by regular projections

    E-Print Network [OSTI]

    Hept, Kerstin

    2007-01-01

    We consider the tropical variety $\\mathcal{T}(I)$ of a prime ideal $I$ generated by the polynomials $f_1, ..., f_r$ and revisit the regular projection technique introduced by Bieri and Groves from a computational point of view. In particular, we show that $I$ has a short tropical basis of cardinality at most $r + \\codim I + 1$ at the price of increased degrees, and we provide a computational description of these bases.

  19. Estimating tropical cyclone precipitation risk in Texas

    E-Print Network [OSTI]

    Zhu, Laiyin

    This paper uses a new rainfall algorithm to simulate the long-term tropical cyclone precipitation (TCP) climatology in Texas based on synthetic tropical cyclones generated from National Center for Atmospheric Research/National ...

  20. Climate Theme Global Tropical Moored Buoy Array

    E-Print Network [OSTI]

    Climate Theme Global Tropical Moored Buoy Array: Observing, Understanding Observing System for Climate #12;Performance 4 Global Tropical Moored Buoy Array: A coordinated multi-national effort to develop and sustain moored buoy observing systems for climate research

  1. The Dynamics and Predictability of Tropical Cyclones 

    E-Print Network [OSTI]

    Sippel, Jason A.

    2010-01-15

    Through methodology unique for tropical cyclones in peer-reviewed literature, this study explores how the dynamics of moist convection affects the predictability of tropical cyclogenesis. Mesoscale models are used to perform ...

  2. The multiple vortex nature of tropical cyclogenesis 

    E-Print Network [OSTI]

    Sippel, Jason Allen

    2005-02-17

    This thesis contains an observational analysis of the genesis of Tropical Storm Allison (2001). Using a paradigm of tropical cyclone formation as the superposition of potential vorticity (PV) anomalies, the importance of different scales of PV...

  3. A Ventilation Index for Tropical Cyclones

    E-Print Network [OSTI]

    Tang, Brian

    An important environmental control of both tropical cyclone intensity and genesis is vertical wind shear. One hypothesized pathway by which vertical shear affects tropical cyclones is midlevel ventilation—or the flux of ...

  4. 8, 42214266, 2008 Tropical forest fire

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ACPD 8, 4221­4266, 2008 Tropical forest fire emissions R. J. Yokelson et al. Title Page Abstract Chemistry and Physics Discussions The tropical forest and fire emissions experiment: laboratory fire Publications on behalf of the European Geosciences Union. 4221 #12;ACPD 8, 4221­4266, 2008 Tropical forest fire

  5. Geography 102, Spring 2006 Tropical Climatology

    E-Print Network [OSTI]

    Hours: Tu/Th 9:30p.m-10:30p.m., and by appointment Office: Bunche Hall 1176 Phone: 206 that underly the development of Tropical Cli- mates - the laws that govern the movement of air; solar radiation Circulation in the Tropics - the Hadley Cells, the Trade Winds, the InterTropical Convergence Zone

  6. Geography 102, Spring 2008 Tropical Climatology

    E-Print Network [OSTI]

    Hall 1176 Phone: 206-4590/825-1071, email:raphael@geog.ucla.edu Office Hours: M/W 10:00a.m-11:00a Cli- mates - the laws that govern the movement of air; solar radiation in the Tropics; temperature - the Hadley Cells, the Trade Winds, the InterTropical Convergence Zone, the Tropical ocean circulation

  7. Arguments to question Emanuel's hypothesis on the central role of tropical cyclones in driving the MOC are presented in attached papers.

    E-Print Network [OSTI]

    Miami, University of

    paper claims that most of the wind-forced near- inertial energy is lost. Jacob. Relationship between oceanic energy fluxes and surface winds during tropical (1995) estimated theoretical limits for the energy flux from traveling hurricanes

  8. Diurnal cycle of liquid water path over the subtropical and tropical oceans

    E-Print Network [OSTI]

    Wood, Robert

    (Tropical Rainfall Measuring Mission Microwave Imager) satellite microwave radiometer data. Diurnal, consistent with a diurnal cycle driven largely by cloud solar absorption. In deep convective regions], using a 17 day period of near-continuous ground based microwave radio- meter data around the time

  9. The tropical double description method

    E-Print Network [OSTI]

    Allamigeon, Xavier; Goubault, Eric

    2010-01-01

    We develop a tropical analogue of the classical double description method allowing one to compute an internal representation (in terms of vertices) of a polyhedron defined externally (by inequalities). The heart of the tropical algorithm is a characterization of the extreme points of a polyhedron in terms of a system of constraints which define it. We show that checking the extremality of a point reduces to checking whether there is only one minimal strongly connected component in an hypergraph. The latter problem can be solved in almost linear time, which allows us to eliminate quickly redundant generators. We report extensive tests (including benchmarks from an application to static analysis) showing that the method outperforms experimentally the previous ones by orders of magnitude. The present tools also lead to worst case bounds which improve the ones provided by previous methods.

  10. The Role of the Tropics in Abrupt Climate Changes

    SciTech Connect (OSTI)

    Fedorov, Alexey

    2013-12-07

    Topics addressed include: abrupt climate changes and ocean circulation in the tropics; what controls the ocean thermal structure in the tropics; a permanent El Niño in paleoclimates; the energetics of the tropical ocean.

  11. Cirrus cloud-temperature interactions over a tropical station, Gadanki from lidar and satellite observations

    SciTech Connect (OSTI)

    S, Motty G, E-mail: mottygs@gmail.com; Satyanarayana, M., E-mail: mottygs@gmail.com; Krishnakumar, V., E-mail: mottygs@gmail.com; Dhaman, Reji k., E-mail: mottygs@gmail.com [Department of Optoelectronics, University of Kerala, Kariavattom, Trivandrum-695 581, Kerala (India)

    2014-10-15

    The cirrus clouds play an important role in the radiation budget of the earth's atmospheric system and are important to characterize their vertical structure and optical properties. LIDAR measurements are obtained from the tropical station Gadanki (13.5{sup 0} N, 79.2{sup 0} E), India, and meteorological indicators derived from Radiosonde data. Most of the cirrus clouds are observed near to the tropopause, which substantiates the strength of the tropical convective processes. The height and temperature dependencies of cloud height, optical depth, and depolarization ratio were investigated. Cirrus observations made using CALIPSO satellite are compared with lidar data for systematic statistical study of cirrus climatology.

  12. Benefits of Tropical Forest Management Under the New Climate...

    Open Energy Info (EERE)

    Benefits of Tropical Forest Management Under the New Climate Change Agreement-A Case Study in Cambodia Jump to: navigation, search Name Benefits of Tropical Forest Management Under...

  13. 7, 69036958, 2007 Tropical Forest fire

    E-Print Network [OSTI]

    Boyer, Edmond

    ACPD 7, 6903­6958, 2007 Tropical Forest fire emissions R. J. Yokelson et al. Title Page Abstract Discussions The Tropical Forest and fire emissions experiment: overview and airborne fire emission factor Forest Service, Fire Sciences Laboratory, Missoula, MT, USA Received: 4 May 2007 ­ Accepted: 10 May 2007

  14. Normal Conducting CLIC Technology

    E-Print Network [OSTI]

    Jensen, E

    2006-01-01

    The CLIC (Compact Linear Collider) multi-lateral study group based at CERN is studying the technology for an electron-positron linear collider with a centre-of-mass energy up to 5 TeV. In contrast to the International Linear Collider (ILC) study which has chosen to use super-conducting cavities with accelerating gradients in the range of 30-40 MV/m to obtain centre-of-mass collision energies of 0.5-1 TeV, the CLIC study aims to use a normal-conducting system based on two-beam technology with gradients of 150 MV/m. It is generally accepted that this change in technology is not only necessary but the only viable choice for a cost-effective multi-TeV collider. The CLIC study group is studying the technology issues of such a machine, and is in particular developing state-of-the-art 30 GHz molybdenum-iris accelerating structures and power extraction and transfer structures (PETS). The accelerating structure has a new geometry which includes fully-profiled RF surfaces optimised to minimize surface fields, and hybri...

  15. Normal Conducting CLIC Technology

    SciTech Connect (OSTI)

    Jensen, Erk

    2006-01-03

    The CLIC (Compact Linear Collider) multi-lateral study group based at CERN is studying the technology for an electron-positron linear collider with a centre-of-mass energy up to 5 TeV. In contrast to the International Linear Collider (ILC) study which has chosen to use super-conducting cavities with accelerating gradients in the range of 30-40 MV/m to obtain centre-of-mass collision energies of 0.5-1 TeV, the CLIC study aims to use a normal-conducting system based on two-beam technology with gradients of 150 MV/m. It is generally accepted that this change in technology is not only necessary but the only viable choice for a cost-effective multi-TeV collider. The CLIC study group is studying the technology issues of such a machine, and is in particular developing state-of-the-art 30 GHz molybdenum-iris accelerating structures and power extraction and transfer structures (PETS). The accelerating structure has a new geometry which includes fully-profiled RF surfaces optimised to minimize surface fields, and hybrid damping using both iris slots and radial waveguides. A newly-developed structure-optimisation procedure has been used to simultaneously balance surface fields, power flow, short and long-range transverse wakefields, RF-to-beam efficiency and the ratio of luminosity to input power. The slotted irises allow a simple structure fabrication by high-precision high-speed 3D milling of just four pieces, and an even easier bolted assembly in a vacuum chamber.

  16. The global climate for December 1990-February 1991: Strong temperature and precipitation contrasts over North America and Eurasia; mixed ENSO conditions in the tropics

    SciTech Connect (OSTI)

    Chelliah, M. )

    1993-07-01

    During most of the December 1990-February 1991 season sharp transcontinental temperature anomaly contrasts were evident in North America, Eurasia, and Australia. Large-scale atmospheric precipitations are more difficult to characterize. In the equatorial tropics there was some evidence of conditions similar to ENSO near the date line, but an almost complete failure of other ENSO components to appear in the east Pacific and in the tropical atmospheric circulation. 12 refs., 21 figs., 1 tab.

  17. The Tropical Forest and Fire Emissions Experiment: overview and airborne fire emission factor measurements

    E-Print Network [OSTI]

    2007-01-01

    W. M. : The tropical forest and fire emissions experiment:Physics The Tropical Forest and Fire Emissions Experiment:A. : The tropical forest and fire emissions experiment:

  18. Tropical cyclone preparedness and response : opportunities for operations research

    E-Print Network [OSTI]

    Murphy, Maurice D

    2008-01-01

    This thesis explores how operations research methods can be applied in the emergency response community by looking at two recent tropical storm disasters; tropical cyclone Yemyin in Pakistan, June 2007 and super typhoon ...

  19. Diurnal analysis of intensity trends in Atlantic tropical cyclones

    E-Print Network [OSTI]

    Kowch, Roman S

    2013-01-01

    I postulate that a diurnal cycle may exist in observational variables related to tropical cyclone (TC) intensity. Prior studies document a significant diurnal signal in moist convection across tropical regions. Since ...

  20. Channel planform dynamics of an alluvial tropical river 

    E-Print Network [OSTI]

    Alvarez, Aldo

    2005-08-29

    apparently plays a relatively minor role as a formative event in shaping the overall humid tropical landscape. A third objective was to develop an empirical model for predicting bend migration rates in humid tropical rivers, resulting in empirical...

  1. The Precipitation Characteristics of ISCCP Tropical Weather States DONGMIN LEE

    E-Print Network [OSTI]

    Kang, In-Sik

    The Precipitation Characteristics of ISCCP Tropical Weather States DONGMIN LEE GESTAR, University The authors examine the daytime precipitation characteristics of the International Satellite Cloud Climatology precipitation dataset used is the Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation

  2. Ocean dynamics and thermodynamics in the tropical Indo- Pacific region

    E-Print Network [OSTI]

    Drushka, Kyla

    2011-01-01

    Pacific Oceans . . . . . . . . . . . . . . . . . . . . . . . . . . . . .in the eastern tropical Pacific Ocean associated with thethe western equatorial Pacific Ocean. J. Geophys. Res. , 96,

  3. Climate Science in the Tropics: Waves, Vortices, Boualem Khouider1

    E-Print Network [OSTI]

    Stechmann, Samuel N.

    Climate Science in the Tropics: Waves, Vortices, and PDEs Boualem Khouider1 , Andrew J Majda2 and climate on the entire globe, yet contemporary operational computer models are often deficient.10 Keywords: Climate science, Tropical meteorology, waves, vortices, convection, PDEs, MJO, GCMs, tropical

  4. Tropical cyclone energy dispersion under vertical shears Xuyang Ge,1

    E-Print Network [OSTI]

    Li, Tim

    Tropical cyclone energy dispersion under vertical shears Xuyang Ge,1 Tim Li,1,2 and Xiaqiong Zhou1] Tropical cyclone Rossby wave energy dispersion under easterly and westerly vertical shears is investigated, and X. Zhou (2007), Tropical cyclone energy dispersion under vertical shears, Geophys. Res. Lett., 34, L

  5. LOW LEVEL JETS IN THE TROPICAL AMERICAS Submitted by

    E-Print Network [OSTI]

    Schubert, Wayne H.

    THESIS LOW LEVEL JETS IN THE TROPICAL AMERICAS Submitted by GABRIELA MORA ROJAS Department LEVEL JETS IN THE TROP- ICAL AMERICAS BE ACCEPTED AS FULFILLING IN PART REQUIREMENTS FOR THE DEGREE JETS IN THE TROPICAL AMERICAS The climatologies of five tropical low level jets are studied through

  6. What is a Hurricane? Tropical system with maximum sustained

    E-Print Network [OSTI]

    Meyers, Steven D.

    Hurricane 101 #12;What is a Hurricane? · Tropical system with maximum sustained surface wind of 74 mph or greater. A hurricane is the worst and the strongest of all tropical systems. · Also known as a tropical cyclone. #12;Hurricanes in Florida · 1851-2004 Florida's Hurricane Total: 110 Southwest Florida

  7. Hurricane Isaac, August 28, 2012/NOAA Tropical Cyclones

    E-Print Network [OSTI]

    Hurricane Isaac, August 28, 2012/NOAA Tropical Cyclones A PREPAREDNESS GUIDE U.S. DEPARTMENT, 6 of which became hurricanes East Pacific Ocean: 15 tropical storms, 8 of which became hurricanes Central Pacific Ocean: 4 tropical storms, 2 of which became hurricanes Over a typical 2-year period, the U

  8. Alien plant invasions in tropical and sub-tropical savannas: patterns, processes and prospects

    E-Print Network [OSTI]

    Foxcroft, Llewellyn C.; Richardson, David M.; Rejmánek, Marcel; Pyšek, Petr

    2010-01-01

    Tanzania Species Family Alien plant invasions in savannasLo pez-Olmedo et al. 2007). Alien plant invasions in Africanspecies of naturalised alien plants for tropical savannas in

  9. Climate Science: Tropical Expansion by Ocean Swing

    SciTech Connect (OSTI)

    Lu, Jian

    2014-04-01

    The tropical belt has become wider over the past decades, but climate models fall short of capturing the full rate of the expansion. The latest analysis of the climate simulations suggests that a long-term swing of the Pacific Decadal Oscillation is the main missing cause.

  10. Chapter 4587 TROPICAL CYCLOGENESIS IN WIND SHEAR

    E-Print Network [OSTI]

    Nolan, David S.

    , it is shown that small values of wind shear in the range of 1.25 to 5 ms -1 are the most favorable, and very and middle troposphere, and a relatively small value of vertical wind shear, which is the change with heightChapter 4587 TROPICAL CYCLOGENESIS IN WIND SHEAR: CLIMATOLOGICAL RELATIONSHIPS AND PHYSICAL

  11. Near-Earth Asteroid Deflection Strategies Dan Mazanek

    E-Print Network [OSTI]

    Near-Earth Asteroid Deflection Strategies Dan Mazanek Senior Space Systems Engineer NASA Langley Deflection · The impact of a near-Earth asteroid (NEA) is a natural hazard that can be prevented or mitigated so it intersects the Earth's orbit earlier or later than normal. ­ Make sure that the object

  12. Normalized cDNA libraries

    DOE Patents [OSTI]

    Soares, M.B.; Efstratiadis, A.

    1997-06-10

    This invention provides a method to normalize a directional cDNA library constructed in a vector that allows propagation in single-stranded circle form comprising: (a) propagating the directional cDNA library in single-stranded circles; (b) generating fragments complementary to the 3{prime} noncoding sequence of the single-stranded circles in the library to produce partial duplexes; (c) purifying the partial duplexes; (d) melting and reassociating the purified partial duplexes to moderate Cot; and (e) purifying the unassociated single-stranded circles, thereby generating a normalized cDNA library. 4 figs.

  13. Normalized cDNA libraries

    DOE Patents [OSTI]

    Soares, Marcelo B. (New York, NY); Efstratiadis, Argiris (Englewood, NJ)

    1997-01-01

    This invention provides a method to normalize a directional cDNA library constructed in a vector that allows propagation in single-stranded circle form comprising: (a) propagating the directional cDNA library in single-stranded circles; (b) generating fragments complementary to the 3' noncoding sequence of the single-stranded circles in the library to produce partial duplexes; (c) purifying the partial duplexes; (d) melting and reassociating the purified partial duplexes to moderate Cot; and (e) purifying the unassociated single-stranded circles, thereby generating a normalized cDNA library.

  14. ContentsContents3399the normal distribution

    E-Print Network [OSTI]

    Vickers, James

    ContentsContents3399the normal distribution 1. The normal distribution 2. The normal approximation to the binomial distribution 3. Sums and differences of random variables Learning outcomes In a previous Workbook of a continuous random variables: the normal distribution. The probabilities of the normal distribution have

  15. Chapter 6 Continuous Distribution: The Normal Distribution

    E-Print Network [OSTI]

    Hong, Don

    Chapter 6 Continuous Distribution: The Normal Distribution 6.1 Introduction 6.2 Properties of a Normal Distribution 6.3 The Standard Normal Distribution 6.4 Applications of Normal Distribution 6.5 The Central Limit Theorem 6.6 The Normal Approximation to the Binomial Distribution Definition. A continuous

  16. cole normale suprieure de Lyon

    E-Print Network [OSTI]

    Vallette, Bruno

    école normale supérieure de Lyon ENS Lyon Electron quantum optics P. Degiovanni (ENS Lyon) C T. Martin(CPT Marseille) T. Jonckheere J. Rech C. Wahl #12;ENS Lyon A message from G. Fève Gwendal. #12;ENS Lyon ENS Lyon Outline · Introduction and motivation · Single electron coherence · Relaxation

  17. May 28-29, 2008/ARR Thermal Effect of Off-Normal Energy

    E-Print Network [OSTI]

    Raffray, A. René

    May 28-29, 2008/ARR 1 Thermal Effect of Off-Normal Energy Deposition on Bare Ferritic Steel First #12;May 28-29, 2008/ARR 2 Power Plant FW Under Energy Deposition from Off- Normal Conditions · Thermal Meeting) · Disruptions: ­ Parallel energy density for thermal quench = 28-45 MJ/m2 near X

  18. Experiment to Characterize Tropical Cloud Systems

    SciTech Connect (OSTI)

    May, Peter T.; Mather, Jim H.; Jakob, Christian

    2005-08-02

    A major experiment to study tropical convective cloud systems and their impacts will take place around Darwin, Northern Australia in early 2006. The Tropical Warm Pool International Cloud Experiment (TWP-ICE) is a collaboration including the DOE ARM (Atmospheric Radiation Measurement) and ARM-UAV programs, NASA centers, the Australian Bureau of Meteorology, CSIRO, and universities in the USA, Australia, Japan, the UK, and Canada. TWP-ICE will be preceded in November/December 2004 by a collaborating European aircraft campaign involving the EU SCOUT-O3 and UK NERC ACTIVE projects. Detailed atmospheric measurements will be made in the Darwin area through the whole Austral summer, giving unprecedented coverage through the pre-monsoon and monsoon periods.

  19. Near-electrode imager

    DOE Patents [OSTI]

    Rathke, Jerome W. (Lockport, IL); Klingler, Robert J. (Westmont, IL); Woelk, Klaus (Wachtberg, DE); Gerald, II, Rex E. (Brookfield, IL)

    2000-01-01

    An apparatus, near-electrode imager, for employing nuclear magnetic resonance imaging to provide in situ measurements of electrochemical properties of a sample as a function of distance from a working electrode. The near-electrode imager uses the radio frequency field gradient within a cylindrical toroid cavity resonator to provide high-resolution nuclear magnetic resonance spectral information on electrolyte materials.

  20. Radiative Heating of the ISCCP Upper Level Cloud Regimes and its Impact on the Large-scale Tropical Circulation

    SciTech Connect (OSTI)

    Li, Wei; Schumacher, Courtney; McFarlane, Sally A.

    2013-01-31

    Radiative heating profiles of the International Satellite Cloud Climatology Project (ISCCP) cloud regimes (or weather states) were estimated by matching ISCCP observations with radiative properties derived from cloud radar and lidar measurements from the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) sites at Manus, Papua New Guinea, and Darwin, Australia. Focus was placed on the ISCCP cloud regimes containing the majority of upper level clouds in the tropics, i.e., mesoscale convective systems (MCSs), deep cumulonimbus with cirrus, mixed shallow and deep convection, and thin cirrus. At upper levels, these regimes have average maximum cloud occurrences ranging from 30% to 55% near 12 km with variations depending on the location and cloud regime. The resulting radiative heating profiles have maxima of approximately 1 K/day near 12 km, with equal heating contributions from the longwave and shortwave components. Upper level minima occur near 15 km, with the MCS regime showing the strongest cooling of 0.2 K/day and the thin cirrus showing no cooling. The gradient of upper level heating ranges from 0.2 to 0.4 K/(day?km), with the most convectively active regimes (i.e., MCSs and deep cumulonimbus with cirrus) having the largest gradient. When the above heating profiles were applied to the 25-year ISCCP data set, the tropics-wide average profile has a radiative heating maximum of 0.45Kday-1 near 250 hPa. Column-integrated radiative heating of upper level cloud accounts for about 20% of the latent heating estimated by the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR). The ISCCP radiative heating of tropical upper level cloud only slightly modifies the response of an idealized primitive equation model forced with the tropics-wide TRMM PR latent heating, which suggests that the impact of upper level cloud is more important to large-scale tropical circulation variations because of convective feedbacks rather than direct forcing by the cloud radiative heating profiles. However, the height of the radiative heating maxima and gradient of the heating profiles are important to determine the sign and patterns of the horizontal circulation anomaly driven by radiative heating at upper levels.

  1. Clarence Strait Tidal Energy Project, Tenax Energy Tropical Tidal...

    Open Energy Info (EERE)

    Page Edit History Clarence Strait Tidal Energy Project, Tenax Energy Tropical Tidal Test Centre, Jump to: navigation, search 1 Retrieved from "http:en.openei.orgw...

  2. Nitrogen deposition in tropical forests from savanna and deforestation fires

    E-Print Network [OSTI]

    Chen, Y; Randerson, JT; Van Der Werf, GR; Morton, DC; Mu, M; Kasibhatla, PS

    2010-01-01

    15, Atkinson R (2000) Atmospheric chemistry of VOCs and NOx.tropics – impact on atmospheric chemistry and biogeochemicalimpact of fires on atmospheric chemistry. N r can be emitted

  3. "A New Paradigm for Secondary Eyewall Formation in Tropical Cyclones...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Road Princeton, NJ 08540-6649 "A New Paradigm for Secondary Eyewall Formation in Tropical Cyclones", Chun-Chieh Wu (National Taiwan University) Contact Information Website: Website...

  4. Power Normal Distribution Debasis Kundu1

    E-Print Network [OSTI]

    Kundu, Debasis

    Power Normal Distribution Debasis Kundu1 and Rameshwar D. Gupta2 Abstract Recently Gupta and Gupta [10] proposed the power normal distribution for which normal distribution is a special case. The power normal distribution is a skewed distri- bution, whose support is the whole real line. Our main aim

  5. Tropical cyclone size in observations and in radiative-convective equilibrium

    E-Print Network [OSTI]

    Chavas, Daniel Robert

    2013-01-01

    Tropical cyclone size remains an unsolved problem in tropical meteorology, yet size plays a significant role in the damage caused by tropical cyclones due to wind, storm surge, and inland freshwater flooding. This work ...

  6. Performance-based assessment of daylight on tropical buildings- a case Study

    E-Print Network [OSTI]

    Szu Cheng, CHIEN

    2013-01-01

    Sustainability in the Tropics For the visual performance ofSustainability in the Tropics Table 3 Metrics conducted to assess dayliglzting performanceSustainability in the Tropics APPROACH Description of the case study model Daylight performance

  7. Carbon sequestration potential of tropical pasture compared with afforestation in Panama

    E-Print Network [OSTI]

    Potvin, Catherine

    Carbon sequestration potential of tropical pasture compared with afforestation in Panama S E B) to estimate the carbon sequestration potential of tropical pasture compared with afforestation; and (3 show the potential for considerable carbon sequestration of tropical afforestation and highlight

  8. Diurnal Precipitation Regimes in the Global Tropics* KAZUYOSHI KIKUCHI AND BIN WANG

    E-Print Network [OSTI]

    Wang, Bin

    Diurnal Precipitation Regimes in the Global Tropics* KAZUYOSHI KIKUCHI AND BIN WANG Department tropical precipitation are documented by using two complementary Tropical Rainfall Measuring Mission (TRMM, and phase propagation characteristics of the diurnal precipitation. The oceanic regime is characterized

  9. Cascaded target normal sheath acceleration

    SciTech Connect (OSTI)

    Wang, W. P.; Shen, B. F.; Zhang, X. M.; Wang, X. F.; Xu, J. C.; Zhao, X. Y.; Yu, Y. H.; Yi, L. Q.; Shi, Y.; Zhang, L. G.; Xu, T. J.; Xu, Z. Z.

    2013-11-15

    A cascaded target normal sheath acceleration (TNSA) scheme is proposed to simultaneously increase energy and improve energy spread of a laser-produced mono-energetic proton beam. An optimum condition that uses the maximum sheath field to accelerate the center of the proton beam is theoretically found and verified by two-dimensional particle-in-cell simulations. An initial 10 MeV proton beam is accelerated to 21 MeV with energy spread decreased from 5% to 2% under the optimum condition during the process of the cascaded TNSA. The scheme opens a way to scale proton energy lineally with laser energy.

  10. Tropical Warm Pool International Cloud Experiment TWP-ICE Cloud and rain characteristics in the Australian Monsoon

    SciTech Connect (OSTI)

    May, P.T., Jakob, C., and Mather, J.H.

    2004-05-31

    The impact of oceanic convection on its environment and the relationship between the characteristics of the convection and the resulting cirrus characteristics is still not understood. An intense airborne measurement campaign combined with an extensive network of ground-based observations is being planned for the region near Darwin, Northern Australia, during January-February, 2006, to address these questions. The Tropical Warm Pool International Cloud Experiment (TWP-ICE) will be the first field program in the tropics that attempts to describe the evolution of tropical convection, including the large scale heat, moisture, and momentum budgets, while at the same time obtaining detailed observations of cloud properties and the impact of the clouds on the environment. The emphasis will be on cirrus for the cloud properties component of the experiment. Cirrus clouds are ubiquitous in the tropics and have a large impact on their environment but the properties of these clouds are poorly understood. A crucial product from this experiment will be a dataset suitable to provide the forcing and testing required by cloud-resolving models and parameterizations in global climate models. This dataset will provide the necessary link between cloud properties and the models that are attempting to simulate them.

  11. Characterization of Trapped Lignin-Degrading Microbes in Tropical Forest Soil

    E-Print Network [OSTI]

    DeAngelis, Kristen

    2012-01-01

    of Trapped Lignin-Degrading Microbes in Tropical Forest Soilof Trapped Lignin-Degrading Microbes in Journals Tropicalof Trapped Lignin-Degrading Microbes in Tropical Forest Soil

  12. The impact of vertical shear on the sensitivity of tropical cyclogenes...

    Office of Scientific and Technical Information (OSTI)

    The impact of vertical shear on the sensitivity of tropical cyclogenesis to environmental rotation and thermodynamic state: TROPICAL CYCLOGENESIS AND SHEAR Citation Details...

  13. Tropical Forest Trust | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (Utility Company) Jump to: navigation,PowerNetworksEnergia LtdaTropical

  14. Chapter Number1 Biomass Prediction in Tropical Forests:2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Chapter Number1 Biomass Prediction in Tropical Forests:2 The Canopy Grain Approach3 Christophe France9 1. Introduction10 The challenging task of biomass prediction in dense and heterogeneous tropical different forest structures may indeed present similar above ground biomass (AGB) values.13 This is probably

  15. Neural Network forecasts of the tropical Pacific sea surface temperatures

    E-Print Network [OSTI]

    Hsieh, William

    Neural Network forecasts of the tropical Pacific sea surface temperatures Aiming Wu, William W Tang Jet Propulsion Laboratory, Pasadena, CA, USA Neural Networks (in press) December 11, 2005 title: Forecast of sea surface temperature 1 #12;Neural Network forecasts of the tropical Pacific sea

  16. CURRENT SKIPJACK OCEANOGRAPHY CRUISES IN EASTERN TROPICAL PACIFIC OCEAN

    E-Print Network [OSTI]

    CURRENT SKIPJACK OCEANOGRAPHY CRUISES IN EASTERN TROPICAL PACIFIC OCEAN F. Williams A series of skipjack oceanography cruises is planned for two offshore areas in the eastern tropical Pacific Ocean October 23 and arrived in Honolulu November 29; and the David Starr Jordan (Fishery-Oceanography C en t e

  17. Biological Oceanography of the Eastern Tropical Pacific: Summary

    E-Print Network [OSTI]

    540 Biological Oceanography of the Eastern Tropical Pacific: Summary of Existing Information Tuna Oceanography Research Program of the Institute of Marine Resources of the University of California Oceanography of the Eastern Tropical Pacific: Summary of Existing Information By MAURICE BLACKBURN tribution

  18. Facts about ENSO: . Originates in the tropical Pacific

    E-Print Network [OSTI]

    : . Computer models show skill in forecasting tropical Pacific Ocean temperatures one to two years in advance for Pacific Ocean observations that are the foundation of skillful ENSO forecasts: Moored buoys Drifting buoysaaaaaa Facts about ENSO: . Originates in the tropical Pacific . Has a periodicity of 2­7 years

  19. Tropical Moored Buoy Implementation Panel Scottish Association for Marine Science

    E-Print Network [OSTI]

    Tropical Moored Buoy Implementation Panel Scottish Association for Marine Science Oban, Scotland 26 September 2010 8:30 am Welcome and logistics 8:40 The Global Tropical Moored Buoy Array M. J. McPhaden, NOAA/PMEL, Seattle, USA 9:00 Current status of TRITON and m-TRITON buoy array and its data system K. Ando and I. Ueki

  20. Hybrid coupled modeling of the tropical Pacific using neural networks

    E-Print Network [OSTI]

    Hsieh, William

    Hybrid coupled modeling of the tropical Pacific using neural networks Shuyong Li, William W. Hsieh To investigate the potential for improving hybrid coupled models (HCM) of the tropical Pacific by the use: dynamical coupled models, statistical models and hybrid coupled models [Barnston et al., 1994]. A hybrid

  1. Ecological consequences of early Late Pleistocene megadroughts in tropical Africa

    E-Print Network [OSTI]

    Reiners, Peter W.

    Ecological consequences of early Late Pleistocene megadroughts in tropical Africa Andrew S. Cohen conditions in tropical Africa occurred in several discrete episodes between 135 and 90 ka, as demonstrated]. This resulted in extraordinarily low lake levels, even in Africa's deepest lakes. On the basis of well dated

  2. Southern Hemisphere Additional Ozonesondes (SHADOZ) 19982000 tropical ozone climatology

    E-Print Network [OSTI]

    Thompson, Anne

    Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998­2000 tropical ozone climatology 2; published 31 January 2003. [1] The first view of stratospheric and tropospheric ozone variability in the Southern Hemisphere tropics is provided by a 3-year record of ozone soundings from the Southern Hemisphere

  3. Southern Hemisphere Additional Ozonesondes (SHADOZ) 19982004 tropical ozone climatology

    E-Print Network [OSTI]

    Thompson, Anne

    Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998­2004 tropical ozone climatology: 3 more than 3000 ozone profiles from 14 tropical and subtropical sites using balloon- borne technique might cause small station-to-station biases in the total ozone measurement. We present further

  4. Climate change and tropical biodiversity: a new focus

    E-Print Network [OSTI]

    Wisenden, Brian D.

    Climate change and tropical biodiversity: a new focus Jedediah Brodie1 , Eric Post2 and William F, Australia Considerable efforts are focused on the consequences of climate change for tropical rainforests climatic changes and human land use) remain understudied. Key concerns are that aridification could

  5. The Tropical Warm Pool International Cloud Experiment

    SciTech Connect (OSTI)

    May, Peter T.; Mather, James H.; Vaughan, Geraint; Jakob, Christian; McFarquhar, Greg; Bower, Keith; Mace, Gerald G.

    2008-05-01

    One of the most complete data sets describing tropical convection ever collected will result from the upcoming Tropical Warm Pool International Cloud Experiment (TWP-ICE) in the area around Darwin, Northern Australia in January and February 2006. The aims of the experiment, which will be operated in conjunction with the DOE Atmospheric Radiation Measurement (ARM) site in Darwin, will be to examine convective cloud systems from their initial stages through to the decay of the cirrus generated and to measure their impact on the environment. The experiment will include an unprecedented network of ground-based observations (soundings, active and passive remote sensors) combined with low, mid and high altitude aircraft for in-situ and remote sensing measurements. A crucial outcome of the experiment will be a data set suitable to provide the forcing and evaluation data required by cloud resolving and single column models as well as global climate models (GCMs) with the aim to contribute to parameterization development. This data set will provide the necessary link between the observed cloud properties and the models that are attempting to simulate them. The experiment is a large multi-agency experiment including substantial contributions from the United States DOE ARM program, ARM-UAV program, NASA, the Australian Bureau of Meteorology, CSIRO, EU programs and many universities.

  6. Turing's normal numbers: towards randomness Veronica Becher

    E-Print Network [OSTI]

    presumably in 1938 Alan Turing gave an algorithm that produces real numbers normal to every integer base- putable normal numbers, and this result should be attributed to Alan Turing. His manuscript entitled "A

  7. Lacunarity as a texture measure for a tropical forest landscape

    SciTech Connect (OSTI)

    Su, Haiping; Krummel, J.

    1996-01-01

    Fragmentation and loss of tropical forest cover alters terrestrial plant and animal population dynamics, reduces biodiversity and carbon storage capacity, and, as a global phenomenon could affect regional and global climate patterns. Lacunarity as a texture measure can offer a simple solution to characterize the texture of tropical forest landscape and determine spatial patterns associated with ecological processes. Lacunarity quantifies the deviation from translational invariance by describing the distribution of gaps within a binary image at multiple scales. As lacunarity increases, the spatial arrangement of tropical forest gaps will also increase. In this study, we used the Spatial Modeler in Imagine as a graphic programming tool to calculate lacunarity indices for a tropical forest landscape in Southern Mexico and Northern Guatemala. Lacunarity indices were derived from classified Landsat MSS images acquired in 1974 and 1984. Random-generated binary images were also used to derive lacunarity indices and compared with the lacunarity of forest patterns derived from the classified MSS images. Tropical forest area declined about 17%, with most of the forest areas converted into pasture/grassland for grazing. During this period, lacunarity increased about 25%. Results of this study suggest that tropical forest fragmentation could be quantified with lacunarity measures. The study also demonstrated that the Spatial Modeler can be useful as a programming tool to quantify spatial patterns of tropical forest landscape by using remotely sensed data.

  8. NORTHWESTERN UNIVERSITY Thermal Transport Near The Normal-Metal/Superconductor Interface

    E-Print Network [OSTI]

    Chandrasekhar, Venkat

    from a tea lover to a coffee drinker in six years, he indeed leads me to the way of experimentalist. I, for opening the door of Green's function technique. I would like to appreciate the discussions on my thermal

  9. Near-normal-incidence extreme-ultraviolet efficiency of a flat crystalline anisotropically etched blazed grating

    E-Print Network [OSTI]

    designs for high- resolution EUV spectroscopy in astrophysics where high efficiency in high orders produce more scattered light. Second, deviations in the groove profile from an ideal shape cause power.kowalski@nrl.navy.mil) is with the U.S. Naval Research Laboratory, Code 7655.3, 4555 Overlook Avenue, SW, Washington, D.C. 20375. R. K

  10. Tropical Cloud Properties and Radiative Heating Profiles

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Mather, James

    2008-01-15

    We have generated a suite of products that includes merged soundings, cloud microphysics, and radiative fluxes and heating profiles. The cloud microphysics is strongly based on the ARM Microbase value added product (Miller et al., 2003). We have made a few changes to the microbase parameterizations to address issues we observed in our initial analysis of the tropical data. The merged sounding product is not directly related to the product developed by ARM but is similar in that it uses the microwave radiometer to scale the radiosonde column water vapor. The radiative fluxes also differ from the ARM BBHRP (Broadband Heating Rate Profile) product in terms of the radiative transfer model and the sampling interval.

  11. Tropical Cloud Properties and Radiative Heating Profiles

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Mather, James

    We have generated a suite of products that includes merged soundings, cloud microphysics, and radiative fluxes and heating profiles. The cloud microphysics is strongly based on the ARM Microbase value added product (Miller et al., 2003). We have made a few changes to the microbase parameterizations to address issues we observed in our initial analysis of the tropical data. The merged sounding product is not directly related to the product developed by ARM but is similar in that it uses the microwave radiometer to scale the radiosonde column water vapor. The radiative fluxes also differ from the ARM BBHRP (Broadband Heating Rate Profile) product in terms of the radiative transfer model and the sampling interval.

  12. A tropical influence on global climate

    SciTech Connect (OSTI)

    Schneider, E.K.; Kirtman, B.P.; Lindzen, R.S.

    1997-05-15

    A potential influence of tropical sea surface temperature on the global climate response to a doubling of the CO{sub 2} concentration is tested using an atmospheric general circulation model coupled to a slab mixed layer ocean. The warming is significantly reduced when sea surface temperatures in the eastern equatorial Pacific cold tongue region between latitudes 2.25{degrees}N and 2.25{degrees}S are held at the control simulation values. Warming of the global mean temperature outside of the cold tongue region is reduced from 2.4{degrees}C in the unconstrained case to 1.9{degrees}C when the sea surface temperature constraint is applied. The decrease in the warming results from a positive net heat flux into the ocean cold tongue region and implicit heat storage in the subsurface ocean, induced by horizontal atmospheric heat fluxes. The reduced surface temperature warming outside of the cold tongue region is due to reduction in the downward longwave radiative flux at the surface, caused in turn by reduced atmospheric temperature and moisture. The global mean surface temperature responds to the heat storage in the ocean as if the global mean radiative forcing due to the doubled CO{sub 2} (approximately 4 W m{sup {minus}2}) was reduced by the value of the global mean heat flux into the ocean. This mechanism also provides a possible explanation for the observed high correlation on interannual timescales between the global mean tropospheric temperature and sea surface temperature in the eastern tropical Pacific. The results emphasize the importance of correctly modeling the dynamical processes in the ocean and atmosphere that help determine the sea surface temperature in the equatorial eastern Pacific, in addition to the thermodynamical processes, in projecting global warming. 23 refs., 8 figs.

  13. Persistent drying in the tropics linked to natural forcing

    E-Print Network [OSTI]

    Winter, Amos; Zanchettin, Davide; Miller, Thomas; Kushnir, Yochanan; Black, David; Lohmann, Gerrit; Burnett, Allison; Haug, Gerald H.; Estrella-Martínez, Juan; Breitenbach, Sebastian F. M.; Beaufort, Luc; Rubino, Angelo; Cheng, Hai

    2015-07-14

    Approximately half of the world’s population lives in the tropics, and future changes in the hydrological cycle will impact not just the freshwater supplies but also energy production in areas dependent upon hydroelectric power. It is vital...

  14. Eddy formation and propagation in the eastern tropical Pacific 

    E-Print Network [OSTI]

    Jhingran, Vikas Gopal

    1997-01-01

    Observations of eddies in the eastern tropical Pacific from TOPEX altimetry data show that there are seasonal and interannual variations in eddy activity. Comparisons between time of eddy formation and corresponding wind ...

  15. Reduction of tropical land region precipitation variability via transpiration

    E-Print Network [OSTI]

    Lee, Jung-Eun

    Tropical rainforests are known to exhibit low intraseasonal precipitation variability compared with oceanic areas with similar mean precipitation in observations and models. In the present study, the potential role of ...

  16. Commercial Building HVAC Energy Usage in Semi-Tropical Climates 

    E-Print Network [OSTI]

    Worbs, H. E.

    1987-01-01

    . Another consideration is the high ventilation loads due to cooling the moist air prevalent in semi-tropical climates. This paper describes a computer program which assesses all the pertinent variables which comprise the annual heating and cooling energy...

  17. Hyperspectral Remote Sensing of Tropical Grass Quality and Quantity

    E-Print Network [OSTI]

    Hyperspectral Remote Sensing of Tropical Grass Quality and Quantity Onisimo Mutanga 7 April 2004, The Netherlands Prof. W. J. Bond University of Cape Town, South Africa #12;Hyperspectral Remote Sensing 1.2 Hyperspectral remote sensing

  18. Energy Design Guidelines for High Performance Schools: Tropical Island Climates

    SciTech Connect (OSTI)

    2004-11-01

    Design guidelines outline high performance principles for the new or retrofit design of K-12 schools in tropical island climates. By incorporating energy improvements into construction or renovation plans, schools can reduce energy consumption and costs.

  19. Tropical cyclone precipitation risk in the Southern United States

    E-Print Network [OSTI]

    Shedd, Sandra Michael

    2015-01-01

    This thesis works to evaluate the new rainfall algorithm that is used to simulate longterm tropical cyclone precipitation (TCP) climatology throughout the southeastern United States. The TCP climatology is based on a fleet ...

  20. Future precipitation changes and their implications for tropical peatlands

    E-Print Network [OSTI]

    Yang, Zong-Liang

    Future precipitation changes and their implications for tropical peatlands Wenhong Li,1 Robert E. Dickinson, R. Fu, G.-Y. Niu, Z.-L. Yang, and J. G. Canadell (2007), Future precipitation changes

  1. Precipitable water structure in tropical systems as estimated from TOVS 

    E-Print Network [OSTI]

    Hatfield, Eric

    1994-01-01

    The spatial and temporal structures of precipitable water (pW) in tropical systems are estimated using TIROS Operational Vertical Sounder (TOVS) radiances over ten cool seasons and two entire years. Statistical regression ...

  2. Layer inflow into precipitating convection over the western tropical Pacific

    E-Print Network [OSTI]

    Mechem, David B.; Houze, Robert A. Jr.; Chen, Shuyi S.

    2002-07-01

    A conceptual model of tropical convection frequently used in convective parametrization schemes is that of a parcel process in which boundary-layer air, characterized by high equivalent potential temperature, ascends to ...

  3. The Tropical Brown Alga Lobophora variegata (Lamouroux) Womersley: A Prospective Bioindicator for Ag Contamination in Tropical Coastal Waters

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    The Tropical Brown Alga Lobophora variegata (Lamouroux) Womersley: A Prospective Bioindicator determined in the brown alga Lobophora variegata, using radiotracer techniques. Results indicate that this widely distributed alga could be a useful bioindicator species for surveying silver contamination

  4. Response of tropical sea surface temperature, precipitation, and tropical cyclone-related variables to changes in global and local forcing

    E-Print Network [OSTI]

    Sobel, Adam

    A single-column model is used to estimate the equilibrium response of sea surface temperature (SST), precipitation, and several variables related to tropical cyclone (TC) activity to changes in both local and global forcing. ...

  5. Appearance Normalization of Histology Slides Jared Vicorya

    E-Print Network [OSTI]

    and intensity normalization of digitized histology slides stained with two different agents. In comparison to adjustment of faded slides are given, and the effectiveness of the method in aiding statistical classification is shown. Keywords: appearance normalization, histology 1. Introduction Stains are often used

  6. Normalizing the causality between time series

    E-Print Network [OSTI]

    Liang, X San

    2015-01-01

    Recently, a rigorous yet concise formula has been derived to evaluate the information flow, and hence the causality in a quantitative sense, between time series. To assess the importance of a resulting causality, it needs to be normalized. The normalization is achieved through distinguishing three types of fundamental mechanisms that govern the marginal entropy change of the flow recipient. A normalized or relative flow measures its importance relative to other mechanisms. In analyzing realistic series, both absolute and relative information flows need to be taken into account, since the normalizers for a pair of reverse flows belong to two different entropy balances; it is quite normal that two identical flows may differ a lot in relative importance in their respective balances. We have reproduced these results with several autoregressive models. We have also shown applications to a climate change problem and a financial analysis problem. For the former, reconfirmed is the role of the Indian Ocean Dipole as ...

  7. Pharmacological enhancement of memory or cognition in normal subjects

    E-Print Network [OSTI]

    Lynch, Gary; Cox, Conor D.; Gall, Christine M.

    2014-01-01

    enhancement in normal subjects Demeter, E. , and Sarter,enhancement in normal subjects Katche, C. , Goldin, A. ,enhancement in normal subjects by an ampakine (CX717) in

  8. Increase in the Intensity of Postmonsoon Bay of Bengal Tropical Cyclones

    SciTech Connect (OSTI)

    Balaguru, Karthik; Taraphdar, Sourav; Leung, Lai-Yung R.; Foltz, Gregory R.

    2014-05-28

    The post-monsoon (October-November) tropical cyclone (TC) season in the Bay of Bengal has spawned many of the deadliest storms in recorded history. Here it is shown that the intensity of post-monsoon Bay of Bengal TCs, and the contribution of major TCs to total TC power, increased during 1981-2010. It is found that changes in environmental parameters are responsible for the observed increases in TC intensity. Increases in sea surface temperature and upper ocean heat content made the ocean more conducive to TC development, while enhanced convective instability made the atmosphere more favorable for the growth of TCs. The largest changes in the atmosphere and ocean occurred in the eastern Bay of Bengal, where nearly all major TCs form. These changes are part of positive linear trends, suggesting that the intensity of post-monsoon Bay of Bengal TCs may continue to increase in the future.

  9. Tropical Warm Pool International Cloud Experiment (TWP-ICE): Cloud and Rain Characteristics in the Australian Monsoon

    SciTech Connect (OSTI)

    PT May; C Jakob; JH Mather

    2004-05-30

    The impact of oceanic convection on its environment and the relationship between the characteristics of the convection and the resulting cirrus characteristics is still not understood. An intense airborne measurement campaign combined with an extensive network of ground-based observations is being planned for the region near Darwin, Northern Australia, during January-February, 2006, to address these questions. The Tropical Warm Pool – International Cloud Experiment (TWP-ICE) will be the first field program in the tropics that attempts to describe the evolution of tropical convection, including the large scale heat, moisture, and momentum budgets, while at the same time obtaining detailed observations of cloud properties and the impact of the clouds on the environment. The emphasis will be on cirrus for the cloud properties component of the experiment. Cirrus clouds are ubiquitous in the tropics and have a large impact on their environment but the properties of these clouds are poorly understood. A crucial product from this experiment will be a dataset suitable to provide the forcing and testing required by cloud-resolving models and parameterizations in global climate models. This dataset will provide the necessary link between cloud properties and the models that are attempting to simulate them. The experiment is a collaboration between the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Program, the Bureau of Meteorology (BoM), the National Aeronautics and Space Administration (NASA), the European Commission DG RTD-1.2, and several United States, Australian, Canadian, and European Universities. This experiment will be undertaken over a 4-week period in early 2006. January and February corresponds to the wet phase of the Australia monsoon. This season has been selected because, despite Darwin’s coastal location, the convection that occurs over and near Darwin at this time is largely of maritime origin with a large fetch over water. Based on previous experiments, the convection appears typical of maritime convection with widespread convection that has complex organization, but is not as deep or as intense as continental or coastal convection. Therefore, it is expected that the convection and cloud characteristics will be representative of conditions typical for wide areas of the tropics.

  10. 100 E. Normal Street Kirksville, MO 63501

    E-Print Network [OSTI]

    Gering, Jon C.

    . Curran Prendergast Repertoire The 2015 Midwest Band Conductors' Symposium" and address to: Dr. Curran Prendergast, 100 East Normal St. Kirksville, MO 63501.truman.edu/mbcs Clinicians: Dr. Paul Popiel, Director of Bands, University of Kansas Dr. Curran

  11. Termination Checking with Types Strong Normalization for

    E-Print Network [OSTI]

    Abel, Andreas

    Termination Checking with Types Strong Normalization a program can be separated into two parts: As the first step, partial correctness is established by verifying that a program matches its specification; then, termination is shown to obtain full correctness

  12. NORMALITY VERSUS COUNTABLE PARACOMPACTNESS IN PERFECT SPACES

    E-Print Network [OSTI]

    Wage, M. L.; Fleissner, William G.; Reed, G. M.

    1976-07-01

    BULLETIN OF THE AMERICAN MATHEMATICAL SOCIETY Volume 82, Number 4, July 1976 NORMALITY VERSUS COUNTABLE PARACOMPACTNESS IN PERFECT SPACES BY M. L. WAGE, W. G. FLEISSNER, AND G. M. REED Communicated March 5, 1976 Introduction. The purpose... of this announcement is to present, in a unified fashion, solutions to long outstanding questions concerning the relationship between countable paracompactness and normality conditions in perfect spaces. Each section of this paper is the contribution of a single...

  13. Tropical climate variability from the last glacial maximum to the present

    E-Print Network [OSTI]

    Dahl, Kristina Ariel

    2005-01-01

    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 ...

  14. Equilibrium Tropical Cyclone Size in an Idealized State of Axisymmetric Radiative–Convective Equilibrium

    E-Print Network [OSTI]

    Chavas, Daniel Robert

    Tropical cyclone size remains an unsolved problem in tropical meteorology, yet size plays a significant role in modulating damage. This work employs the Bryan cloud model (CM1) to systematically explore the sensitivity of ...

  15. A climatology of tropical synoptic scale behavior from TOVS-estimated precipitable water 

    E-Print Network [OSTI]

    Mackey, Morgan Douglas

    1996-01-01

    Tropical synoptic scale behavior is examined using 3 to 8 day filtered precipitable water (PW) estimated from TOVS operational satellite observations for 24 three-month seasons. Zonally-oriented tropical convergence zones ...

  16. The role of piscivores in a species-rich tropical river 

    E-Print Network [OSTI]

    Layman, Craig Anthony

    2004-11-15

    Much of the world's species diversity is located in tropical and sub-tropical ecosystems, and a better understanding of the ecology of these systems is necessary to stem biodiversity loss and assess community- and ...

  17. Sensitivity of Tropical Cyclone Intensity to Ventilation in an Axisymmetric Model

    E-Print Network [OSTI]

    Tang, Brian

    The sensitivity of tropical cyclone intensity to ventilation of cooler, drier air into the inner core is examined using an axisymmetric tropical cyclone model with parameterized ventilation. Sufficiently strong ventilation ...

  18. Tropical Pacific nutrient dynamics in the modern and pleistocene ocean : insights from the nitrogen isotope system

    E-Print Network [OSTI]

    Rafter, Patrick Anthony

    2009-01-01

    eastern equatorial Pacific Ocean during the past 3 M.Y. ,in the western tropical Pacific Ocean in the Holocene epoch,eastern tropical North Pacific Ocean, Mar. Chem. , 3, 271–

  19. Tropical cyclone motion and recurvature in TCM-90. Master's thesis

    SciTech Connect (OSTI)

    Fitzpatrick, M.E.

    1992-01-01

    Rawinsonde and satellite data collected during the Tropical Cyclone Motion (TCM90) experiment, which was conducted during the summer of 1990 in the Western North pacific, is used to examine tropical cyclone steering motion and recurvature. TCM-90 composite results are compared with those found in a composite study using twenty-one years (1957-77) of Western North Pacific rawinsonde data during the same August-September period and also for all months during this same 21-year period. Both data sets indicate that the composite deep-layer-mean (850-300 mb) winds 5-7 deg from the cyclone center provide an important component of the steering flow for tropical cyclones. However, despite the rawinsonde data enhancements of the TCM-90 experiment, data limitations prevented an accurate observation of steering flow conditions at individual time periods or for the average of only 5-10 time periods when composited together.

  20. Tropical forest responses to increasing atmospheric CO2: current knowledge and opportunities for future research

    E-Print Network [OSTI]

    Bermingham, Eldredge

    their representation in Earth system models. Tropical forests play a significant role in the global carbon cycle

  1. The divergent wind component in data sparse tropical wind fields 

    E-Print Network [OSTI]

    Snyder, Bruce Alan

    1985-01-01

    THE DIVERGENT WIND COMPONENT IN DATA SPARSE TROPICAL WIND FIELDS A Thesis by BRUCE ALAN SNYDER Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December... 1985 Major Subject: Meteorology THE DIVERGENT WIND COMPONENT IN DATA SPARSE TROPICAL WIND FIELDS A Thesis by BRUCE ALAN SNYDER Approved as to style and content by: James P. McGuirk (Co-Chairman) Aylmer IL Thompson (Co-Chairman) W. Homer...

  2. Global warming shifts Pacific tropical cyclone location MinHo Kwon,1,3

    E-Print Network [OSTI]

    Li, Tim

    Global warming shifts Pacific tropical cyclone location Tim Li,1 MinHo Kwon,1,3 Ming Zhao,3 Jong) is used to investigate the change of tropical cyclone frequency in the North Pacific under global warming, and W. Yu (2010), Global warming shifts Pacific tropical cyclone location, Geophys. Res. Lett., 37, L

  3. An optimizing reduced order FDS for the tropical Pacific Ocean reduced gravity model

    E-Print Network [OSTI]

    Aluffi, Paolo

    An optimizing reduced order FDS for the tropical Pacific Ocean reduced gravity model Zhendong Luoa) for the tropical Pacific Ocean reduced gravity model. Ensembles of data are compiled from transient solutions computed from the discrete equation system derived by FDS for the tropical Pacific Ocean reduced gravity

  4. Reduced Order Modeling of the Upper Tropical Pacific Ocean Model Using Proper Orthogonal Decomposition

    E-Print Network [OSTI]

    Aluffi, Paolo

    Reduced Order Modeling of the Upper Tropical Pacific Ocean Model Using Proper Orthogonal of a large-scale upper ocean circulation in the tropic Pacific domain. We construct different POD models-scale seasonal variability of the tropic Pacific obtained by the original model is well captured by a low

  5. Multivariate Data Assimilation in the Tropics by Using Equatorial Waves NEDJELJKA ZAGAR

    E-Print Network [OSTI]

    Zagar, Nedjeljka

    Multivariate Data Assimilation in the Tropics by Using Equatorial Waves NEDJELJKA ZAGAR 1 multivariate assimila- tion methodology. This applies to both dry and moist idealized tropical systems as well as to a 4D-Var NWP assimilation system. Key words: Tropics, Data assimilation, 4D-Var, Multivariate

  6. Estimating recharge thresholds in tropical karst island aquifers: Barbados, Puerto Rico and Guam

    E-Print Network [OSTI]

    Banner, Jay L.

    Estimating recharge thresholds in tropical karst island aquifers: Barbados, Puerto Rico and Guam in tropical island aquifers, such as Barbados, Guam and Puerto Rico, are significantly influenced by tropical of rainfall. The karst aquifers on Barbados, Guam and Puerto Rico have similar rainwater and groundwater

  7. Primary production in the eastern tropical Pacific: A review J. Timothy Pennington a

    E-Print Network [OSTI]

    Pennington, J. Timothy

    , Peru Abstract The eastern tropical Pacific includes 28 million km2 of ocean between 23.5°N phytoplankton growth (and nitrogen fixation) over large portions of the open-ocean eastern tropical Pacific Pacific. Seasonal cycles are weak over much of the open-ocean eastern tropical Pacific, although several

  8. Eddy mean flow decomposition and eddy diffusivity estimates in the tropical Pacific Ocean

    E-Print Network [OSTI]

    Eddy mean flow decomposition and eddy diffusivity estimates in the tropical Pacific Ocean: 2] Eddy diffusivity of the surface velocity field in the tropical Pacific Ocean was estimated using diffusivity estimates in the tropical Pacific Ocean: 2. Results, J. Geophys. Res., 107(C10), 3154, doi:10

  9. Regional Patterns of Tropical Indo-Pacific Climate Change: Evidence of the Walker Circulation Weakening*

    E-Print Network [OSTI]

    Xie, Shang-Ping

    in the tropical eastern Pacific and western Indian Ocean than in the tropical western Pacific and eastern IndianRegional Patterns of Tropical Indo-Pacific Climate Change: Evidence of the Walker Circulation Weakening* HIROKI TOKINAGA, SHANG-PING XIE, AND AXEL TIMMERMANN International Pacific Research Center, SOEST

  10. Recent widening of the tropical belt from global tropopause statistics: Sensitivities

    E-Print Network [OSTI]

    Birner, Thomas

    Recent widening of the tropical belt from global tropopause statistics: Sensitivities Thomas Birner 2010. [1] Several recent studies have shown evidence for a widening of the tropical belt over the past of the resulting widening trend of the tropical belt to these thresholds is investigated using four different

  11. Handbook of normal frames and coordinates

    E-Print Network [OSTI]

    Bozhidar Z. Iliev

    2006-10-01

    The main subject of the book is an up-to-date and in-depth survey of the theory of normal frames and coordinates in differential geometry. The book can be used as a reference manual, review of the existing results and introduction to some new ideas and developments. In the book can be found practically all existing essential results and methods concerning normal frames and coordinates. Most of the results are represented in full detail with full, in some cases new, proofs. All classical results are expanded and generalized in various directions. Theorems of existence, uniqueness and, possibly, holonomicity of the normal frames and coordinates are proved; mostly, the proofs are constructive and some their parts can be used independently for other tasks. Besides published results, their extensions and generalizations, the book contains completely new results which appear for the first time.

  12. Computing Instantaneous Frequency by normalizing Hilbert Transform

    DOE Patents [OSTI]

    Huang, Norden E.

    2005-05-31

    This invention presents Normalized Amplitude Hilbert Transform (NAHT) and Normalized Hilbert Transform(NHT), both of which are new methods for computing Instantaneous Frequency. This method is designed specifically to circumvent the limitation set by the Bedorsian and Nuttal Theorems, and to provide a sharp local measure of error when the quadrature and the Hilbert Transform do not agree. Motivation for this method is that straightforward application of the Hilbert Transform followed by taking the derivative of the phase-angle as the Instantaneous Frequency (IF) leads to a common mistake made up to this date. In order to make the Hilbert Transform method work, the data has to obey certain restrictions.

  13. Increasing carbon storage in intact African tropical forests

    E-Print Network [OSTI]

    Malhi, Yadvinder

    to predictions of future levels of atmospheric carbon dioxide1,2 . The role of tropical forests is critical dioxide concentrations, may be the cause of the increase in carbon stocks13 , as some theory14 and models2 with estimates of fossil fuel emissions, ocean carbon fluxes and carbon released from land-use change, indicate

  14. WMO/CAS/WWW SEVENTH INTERNATIONAL WORKSHOP ON TROPICAL CYCLONES

    E-Print Network [OSTI]

    Smith, Roger K.

    .smith@lmu.de Working Group Members: Zhuo Wang (Univ. Illinois, USA), David Raymond (New Mexico Tech., New Mexico, USA (i.e. thunderstorm activity) and a definite cyclonic surface wind circulation (Holland 1993)." Notably, this definition does not invoke any wind threshold. The same glossary defines a tropical

  15. Reduction of tropical land region precipitation variability via transpiration

    E-Print Network [OSTI]

    Gentine, Pierre

    plants through open stomata: this process (transpiration) cools the plant and facilitates transportReduction of tropical land region precipitation variability via transpiration Jung-Eun Lee,1 in observations and models. In the present study, the potential role of transpiration for this difference

  16. In Situ Survival of Genetically Engineered Microorganisms in a Tropical

    E-Print Network [OSTI]

    Hazen, Terry

    . Alvarez, G. M. Yumet, and C. L. Santiago Department of Biology, P.O. Box 23360, University of Puerto Rico, Rio Piedras, Puerto Rico 00931-3360 T. C. Hazen Savannah River Laboratory, Environmental Sciences microorganisms (GEMs) and their interactions with the environmental microbiota of a tropical river

  17. MET 416: TROPICAL ANALYSIS AND FORECASTING Spring Semester 2013

    E-Print Network [OSTI]

    current (nowcasting) and expected weather, using all available real-time operational weather data Exam 4/9 Summer trade-wind weather based on HaRP 4/11-16 Large-scale influences, Diurnal cycle to the development of tropical storm systems and mesoscale weather. Lectures will include a forecasting perspective

  18. Hybrid coupled models of the tropical Pacific: I interannual variability

    E-Print Network [OSTI]

    Tang, Youmin

    Y. Tang Hybrid coupled models of the tropical Pacific: I interannual variability Received: 20 Two hybrid coupled models (HCMs), an intermediate complexity dynamical ocean model cou- pled to either), hybrid models (e.g., Barnett et al. 1993; Balmaseda et al. 1994,1995), and fully coupled general

  19. Tropical Pacific mid-latitude teleconnections in medieval times

    E-Print Network [OSTI]

    Cobb, Kim

    records from widely distributed regions around the planet, and in many cases is consistent with a cool centennial-scale drought, elevated incidence of wild fire, cool sea surface temperatures (SSTs) along). Proxy records from the tropical Pacific Ocean show contemporaneous changes indicating cool central

  20. The efficiency of diabatic heating and tropical cyclone intensification

    E-Print Network [OSTI]

    Smith, Roger K.

    The efficiency of diabatic heating and tropical cyclone intensification Roger K. Smitha and Michael cyclones to the increasing "efficiency" of diabatic heating in the cyclone's inner core region associated with deep convection. The efficiency, in essence the amount of temperature warming compared to the amount

  1. Tropical geometry of statistical models Lior Pachter and Bernd Sturmfels

    E-Print Network [OSTI]

    Marcolli, Matilde

    for graphical models in statistical learning theory (5), but it differs from other (more classical) notionsTropical geometry of statistical models Lior Pachter and Bernd Sturmfels Department of Mathematics, University of California, Berkeley, CA 94720 Communicated by Stephen E. Fienberg, Carnegie Mellon University

  2. Tropical forest soil microbial communities couple iron and carbon biogeochemistry

    SciTech Connect (OSTI)

    Dubinsky, E.A.; Silver, W.L.; Firestone, M.K.

    2009-10-15

    We report that iron-reducing bacteria are primary mediators of anaerobic carbon oxidation in upland tropical soils spanning a rainfall gradient (3500 - 5000 mm yr-1) in northeast Puerto Rico. The abundant rainfall and high net primary productivity of these tropical forests provide optimal soil habitat for iron-reducing and iron-oxidizing bacteria. Spatially and temporally dynamic redox conditions make iron-transforming microbial communities central to the belowground carbon cycle in these wet tropical forests. The exceedingly high abundance of iron-reducing bacteria (up to 1.2 x 10{sup 9} cells per gram soil) indicated that they possess extensive metabolic capacity to catalyze the reduction of iron minerals. In soils from the higher rainfall sites, measured rates of ferric iron reduction could account for up to 44 % of organic carbon oxidation. Iron reducers appeared to compete with methanogens when labile carbon availability was limited. We found large numbers of bacteria that oxidize reduced iron at sites with high rates of iron reduction and large numbers of iron-reducers. the coexistence of large populations of ironreducing and iron-oxidizing bacteria is evidence for rapid iron cycling between its reduced and oxidized states, and suggests that mutualistic interactions among these bacteria ultimately fuel organic carbon oxidation and inhibit CH4 production in these upland tropical forests.

  3. Southern Hemisphere Additional Ozonesondes (SHADOZ) 19982000 tropical ozone climatology

    E-Print Network [OSTI]

    Thompson, Anne

    Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998­2000 tropical ozone climatology 1. Comparison with Total Ozone Mapping Spectrometer (TOMS) and ground-based measurements Anne M. Thompson,1 Additional Ozonesondes (SHADOZ) project and established from operational sites, provided over 1000 ozone

  4. Geochronology of Quaternary glaciations from the tropical Cordillera Huayhuash, Peru

    E-Print Network [OSTI]

    Mark, Bryan G.

    Geochronology of Quaternary glaciations from the tropical Cordillera Huayhuash, Peru Sarah R. Hall to peaks >4800 m a.s.l. Geomorphology and geochronology in the nearby Cordillera Blanca and Junin Plain et al., 2005a, b) and thus completes a north-south glacial geochronologic transect spanning w1

  5. AGCM Precipitation Biases in the Tropical Atlantic M. BIASUTTI

    E-Print Network [OSTI]

    Biasutti, Michela

    AGCM Precipitation Biases in the Tropical Atlantic M. BIASUTTI Lamont-Doherty Earth Observatory precipitation in the Southern Hemisphere in boreal spring and in the Caribbean region in boreal summer precipitation maximum does not occur there. This is the case even though these GCMs accurately place the maximum

  6. Near infrared surfaceplasmonpolariton with hyperbolic metamaterials...

    Office of Scientific and Technical Information (OSTI)

    Near infrared surfaceplasmonpolariton with hyperbolic metamaterials. Citation Details In-Document Search Title: Near infrared surfaceplasmonpolariton with hyperbolic metamaterials....

  7. Possible linkages between Saharan dust and tropical cyclone rain band invigoration in the eastern Atlantic during NAMMA-06

    E-Print Network [OSTI]

    Rutledge, Steven

    for tropical cyclogenesis, it also provides an infusion of cloud condensation and ice nuclei which can

  8. Normal butane/iso-butane separation

    SciTech Connect (OSTI)

    Volles, W.K.; Cusher, N.A.

    1986-08-26

    This patent describes an improved pressure swing adsorption process for the separation of iso-butane from normal butane in an adsorption system having at least three adsorbent beds, each bed of which undergoes, on a cyclic basis and a processing sequence comprising: introducing a feed gas mixture of iso-butane and normal butane at an upper adsorption pressure to the feed end of the bed capable of selectively adsorbing normal butane as the more selectivity adsorbable component of the gas mixture. The iso-butane as the less readily adsorbable component passes through the bed and is discharged from the discharge end. The feed gas introduction is continued as a normal butane adsorption front is formed in the bed and passes through the bed from the feed end and breaks through at the discharge end of the bed, a portion of the iso-butane effluent stream thus discharged being diverted for passage as purge gas to another bed in the system; and countercurrently depressurizing the bed with release of gas from the feed end.

  9. Termination Checking with Types Strong Normalization for

    E-Print Network [OSTI]

    Abel, Andreas

    Termination Checking with Types Strong Normalization for Mendler­Style Course­Of­Value Recursion can be separated into two parts: As the first step, partial correctness is established by verifying that a program matches its specification; then, termination is shown to obtain full correctness. For practical

  10. Termination Checking with Types Strong Normalization for

    E-Print Network [OSTI]

    Abel, Andreas

    Termination Checking with Types Strong Normalization for Mendler-Style Course-Of-Value Recursion can be separated into two parts: As the first step, partial correctness is established by verifying that a program matches its specification; then, termination is shown to obtain full correctness. For practical

  11. The SNAP near infrared detectors

    E-Print Network [OSTI]

    2002-01-01

    it will detect Type Ia supernovæ between z = 1 and 1.7 andphotometry for all supernovæ. HgCdTe technology, with a cut-Keywords: Cosmology, Supernovae, Dark Energy, Near Infrared,

  12. Influence of Transcontinental arch on Cretaceous listric-normal faulting, west flank, Denver basin

    SciTech Connect (OSTI)

    Davis, T.L.

    1983-08-01

    Seismic studies along the west flank of the Denver basin near Boulder and Greeley, Colorado illustrate the interrelationship between shallow listric-normal faulting in the Cretaceous and deeper basement-controlled faulting. Deeper fault systems, primarily associated with the Transcontinental arch, control the styles and causative mechanisms of listric-normal faulting that developed in the Cretaceous. Three major stratigraphic levels of listric-normal faulting occur in the Boulder-Greeley area. These tectonic sensitive intervals are present in the following Cretaceous formations: Laramie-Fox Hills-upper Pierre, middle Pierre Hygiene zone, and the Niobrara-Carlile-Greenhorn. Documentation of the listric-normal fault style reveals a Wattenberg high, a horst block or positive feature of the greater Transcontinental arch, was active in the east Boulder-Greeley area during Cretaceous time. Paleotectonic events associated with the Wattenberg high are traced through analysis of the listric-normal fault systems that occur in the area. These styles are important to recognize because of their stratigraphic and structural influence on Cretaceous petroleum reservoir systems in the Denver basin. Similar styles of listric-normal faulting occur in the Cretaceous in many Rocky Mountain foreland basins.

  13. Normal Conditions of Transport Truck Test of a Surrogate Fuel...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Normal Conditions of Transport Truck Test of a Surrogate Fuel Assembly. Citation Details In-Document Search Title: Normal Conditions of Transport Truck Test of a Surrogate Fuel...

  14. Status of High Power Tests of Normal Conducting Short Standing...

    Office of Scientific and Technical Information (OSTI)

    Status of High Power Tests of Normal Conducting Short Standing Wave Structures Citation Details In-Document Search Title: Status of High Power Tests of Normal Conducting Short...

  15. Directions to the Ecole Normale Suprieure de Lyon The Ecole Normale Suprieure de Lyon

    E-Print Network [OSTI]

    Dauxois, Thierry

    Directions to the Ecole Normale Supérieure de Lyon The Ecole Normale Supérieure de Lyon is located in Gerland, a neighborhood in the southern part of Lyon, not far from the Rhône river and the Halle Tony. How to get to l'ENS-Lyon ... #12;· From Lyon-Saint Exupéry (Satolas) airport Every 20 min, a shuttle

  16. Static jaw collimation settings to minimize radiation dose to normal brain tissue during stereotactic radiosurgery

    SciTech Connect (OSTI)

    Han, Eun Young; Zhang Xin; Yan Yulong; Sharma, Sunil; Penagaricano, Jose; Moros, Eduardo; Corry, Peter

    2012-01-01

    At University of Arkansas for Medical Sciences (UAMS) intracranial stereotactic radiosurgery (SRS) is performed by using a linear accelerator with an add-on micromultileaf collimator (mMLC). In our clinical setting, static jaws are automatically adapted to the furthest edge of the mMLC-defined segments with 2-mm (X jaw) and 5-mm (Y jaw) margin and the same jaw values are applied for all beam angles in the treatment planning system. This additional field gap between the static jaws and the mMLC allows additional radiation dose to normal brain tissue. Because a radiosurgery procedure consists of a single high dose to the planning target volume (PTV), reduction of unnecessary dose to normal brain tissue near the PTV is important, particularly for pediatric patients whose brains are still developing or when a critical organ, such as the optic chiasm, is near the PTV. The purpose of this study was to minimize dose to normal brain tissue by allowing minimal static jaw margin around the mMLC-defined fields and different static jaw values for each beam angle or arc. Dose output factors were measured with various static jaw margins and the results were compared with calculated doses in the treatment planning system. Ten patient plans were randomly selected and recalculated with zero static jaw margins without changing other parameters. Changes of PTV coverage, mean dose to predefined normal brain tissue volume adjacent to PTV, and monitor units were compared. It was found that the dose output percentage difference varied from 4.9-1.3% for the maximum static jaw opening vs. static jaw with zero margins. The mean dose to normal brain tissue at risk adjacent to the PTV was reduced by an average of 1.9%, with negligible PTV coverage loss. This dose reduction strategy may be meaningful in terms of late effects of radiation, particularly in pediatric patients. This study generated clinical knowledge and tools to consistently minimize dose to normal brain tissue.

  17. Characterization of tropical near-shore fish communities by coastal habitat status on spatially complex island systems

    E-Print Network [OSTI]

    Sealey, Kathleen Sullivan

    complex island systems Vanessa L. Nero & Kathleen Sullivan Sealey Coastal Ecology Project, Department communities for Andros Island, Bahamas, a complex coastal-reef island system. Benthic assessments and beach available to fishes on island bank systems. Since habitat mapping is often incorpo- rated into marine

  18. Normal force controlled rheology for thermoreversible gels

    E-Print Network [OSTI]

    Bosi Mao; Thibaut Divoux; Patrick Snabre

    2015-08-07

    A wide range of thermoreversible gels are prepared by cooling down to ambient temperature hot aqueous solutions of polymers. During the sol-gel transition, such soft solids may experience a volume contraction leading to experimental issues regarding rheological measurements such as the stress-induced release of solvent, and the partial loss of contact between the sample and the shear cell. In this article, we revisit the formation of thermoreversible gels through a series of benchmark experiments conducted on agar gels in a plate-plate geometry. Monitoring the gelation with a constant gap results in an artificial drift of the gel elastic modulus $G'$ because of the sample contraction. We show that maintaining a constant normal force equals to zero instead of a constant gap allows $G'$ to reach a plateau as the gap variation compensates the sample contraction. The latter method provides a way to measure more reliably the gel linear properties with either rough or smooth boundary conditions, and allows us to quantify the sample contraction. Furthermore, we also unravel two subtle artifacts associated with metallic boundary conditions that may impact rheological measurements during the early stage of the gelation. We show that the slow oxidation of the plate by the solution and/or the presence of an oil layer around the sample, that is traditionally used to prevent evaporation, may both lead to a premature and artificial growth of $G'$ which should not be misinterpreted as the formation of a pre-gel. Finally, we illustrate the relevance of the controlled normal force protocol, by investigating the influence of thermal history on the mechanical properties of agar gels. Our work offers an extensive review of the artifacts associated with the rheology of thermoreversible gels and paves the way for a more systematic use of normal force controlled rheology.

  19. ARM - Measurement - Shortwave broadband direct normal irradiance

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments?govInstrumentsnoaacrnBarrow, Alaska Outreach Homepolarization ARM Data Discoverydiffusedirect normal

  20. Reduced impact logging minimally alters tropical rainforest carbon and energy exchange

    E-Print Network [OSTI]

    2011-01-01

    variations in energy and carbon exchange over forest andon tropical forest carbon, water, and energy exchange. Twothe role of forest in the water and energy cycles and

  1. Tropical Storm Frances Situation Report, September 6, 2004 (10:00 AM EDT)

    SciTech Connect (OSTI)

    none,

    2004-09-06

    The report provides highlights related to impacts of Tropical Storm Frances. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  2. Tropical Storm Frances Situation Report, September 6, 2004 (10:00 PM EDT)

    SciTech Connect (OSTI)

    none,

    2004-09-06

    The report provides highlights related to impacts of Tropical Storm Frances. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  3. Tropical Storm Frances Situation Report, September 6, 2004 (4:00 PM EDT)

    SciTech Connect (OSTI)

    none,

    2004-09-06

    The report provides highlights related to impacts of Tropical Storm Frances. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  4. Tropical Storm Frances Situation Report, September 7, 2004 (10:00 AM EDT)

    SciTech Connect (OSTI)

    none,

    2004-09-07

    The report provides highlights related to impacts of Tropical Storm Frances. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  5. Tropical Storm Frances Situation Report, September 7, 2004 (4:00 PM EDT)

    SciTech Connect (OSTI)

    none,

    2004-09-07

    The report provides highlights related to impacts of Tropical Storm Frances. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  6. Characterization of trapped lignin-degrading microbes in tropical forest soil

    E-Print Network [OSTI]

    DeAngelis, K.M.

    2012-01-01

    of trapped lignin-degrading microbes in tropical forest soilunseen majority: soil microbes as drivers of plant diversitya challenge for soil microbes and biofuels engineers alike.

  7. Holocene hydrologic balance of tropical South America from oxygen isotopes of lake sediment opal, Venezuelan Andes

    E-Print Network [OSTI]

    Wolfe, Alexander P.

    Holocene hydrologic balance of tropical South America from oxygen isotopes of lake sediment opal.V. All rights reserved. Keywords: oxygen isotopes; biogenic opal; hydrologic balance; Holocene; Venezuela

  8. Local asymptotic normality in quantum statistics

    E-Print Network [OSTI]

    Madalin Guta; Anna Jencova

    2007-05-24

    The theory of local asymptotic normality for quantum statistical experiments is developed in the spirit of the classical result from mathematical statistics due to Le Cam. Roughly speaking, local asymptotic normality means that the family varphi_{\\theta_{0}+ u/\\sqrt{n}}^{n} consisting of joint states of n identically prepared quantum systems approaches in a statistical sense a family of Gaussian state phi_{u} of an algebra of canonical commutation relations. The convergence holds for all "local parameters" u\\in R^{m} such that theta=theta_{0}+ u/sqrt{n} parametrizes a neighborhood of a fixed point theta_{0}\\in Theta\\subset R^{m}. In order to prove the result we define weak and strong convergence of quantum statistical experiments which extend to the asymptotic framework the notion of quantum sufficiency introduces by Petz. Along the way we introduce the concept of canonical state of a statistical experiment, and investigate the relation between the two notions of convergence. For reader's convenience and completeness we review the relevant results of the classical as well as the quantum theory.

  9. Distinct p53 genomic binding patterns in normal and cancer-derived human cells

    SciTech Connect (OSTI)

    Botcheva K.; McCorkle S. R.; McCombie W. R.; Dunn J. J.; Anderson C. W.

    2011-12-15

    We report here genome-wide analysis of the tumor suppressor p53 binding sites in normal human cells. 743 high-confidence ChIP-seq peaks representing putative genomic binding sites were identified in normal IMR90 fibroblasts using a reference chromatin sample. More than 40% were located within 2 kb of a transcription start site (TSS), a distribution similar to that documented for individually studied, functional p53 binding sites and, to date, not observed by previous p53 genome-wide studies. Nearly half of the high-confidence binding sites in the IMR90 cells reside in CpG islands, in marked contrast to sites reported in cancer-derived cells. The distinct genomic features of the IMR90 binding sites do not reflect a distinct preference for specific sequences, since the de novo developed p53 motif based on our study is similar to those reported by genome-wide studies of cancer cells. More likely, the different chromatin landscape in normal, compared with cancer-derived cells, influences p53 binding via modulating availability of the sites. We compared the IMR90 ChIPseq peaks to the recently published IMR90 methylome1 and demonstrated that they are enriched at hypomethylated DNA. Our study represents the first genome-wide, de novo mapping of p53 binding sites in normal human cells and reveals that p53 binding sites reside in distinct genomic landscapes in normal and cancer-derived human cells.

  10. Overview Report: Normal and Emergency Operation Visualization

    SciTech Connect (OSTI)

    Greitzer, Frank L.

    2011-05-01

    This is an overview report to document and illustrate methods used in a project entitled “Normal and Emergency Operations Visualization” for a utility company, conducted in 2009-2010 timeframe with funding from the utility company and the U.S. Department of Energy. The original final report (about 180 pages) for the project is not available for distribution because it alludes to findings that assessed the design of an operational system that contained proprietary information; this abridged version contains descriptions of methods and some findings to illustrate the approach used, while avoiding discussion of sensitive or proprietary information. The client has approved this abridged version of the report for unlimited distribution to give researchers and collaborators the benefit of reviewing the research concepts and methods that were applied in this study.

  11. Asymptotic normalization coefficients from ab initio calculations

    E-Print Network [OSTI]

    Kenneth M. Nollett; R. B. Wiringa

    2011-04-14

    We present calculations of asymptotic normalization coefficients (ANCs) for one-nucleon removals from nuclear states of mass numbers 3 to 9. Our ANCs were computed from variational Monte Carlo solutions to the many-body Schroedinger equation with the combined Argonne v18 two-nucleon and Urbana IX three-nucleon potentials. Instead of computing explicit overlap integrals, we applied a Green's function method that is insensitive to the difficulties of constructing and Monte Carlo sampling the long-range tails of the variational wave functions. This method also allows computation of the ANC at the physical separation energy, even when it differs from the separation energy for the Hamiltonian. We compare our results, which for most nuclei are the first ab initio calculations of ANCs, with existing experimental and theoretical results and discuss further possible applications of the technique.

  12. Quantum effects near future singularities

    E-Print Network [OSTI]

    John D. Barrow; Antonio B. Batista; Giuseppe Dito; Julio C. Fabris; M. J. S. Houndjo

    2012-01-09

    General relativity allows a variety of future singularities to occur in the evolution of the universe. At these future singularities, the universe will end in a singular state after a finite proper time and geometrical invariants of the space time will diverge. One question that naturally arises with respect to these cosmological scenarios is the following: can quantum effects lead to the avoidance of these future singularities? We analyze this problem considering massless and conformally coupled scalar fields in an isotropic and homogeneous background leading to future singularities. It is shown that near strong, big rip-type singularities, with violation of the energy conditions, the quantum effects are very important, while near some milder classes of singularity like the sudden singularity, which preserve the energy conditions, quantum effects are irrelevant.

  13. Stone-Cech remainder which make continuous images normal

    E-Print Network [OSTI]

    Fleissner, William G.; Levy, Ronnie

    1989-07-01

    from a normal space X onto a regular space Y , then there are a space Z and a perfect map bf : Z —» Y extending / such that X C Z C ßX . If / is a continuous surjection from normal X onto Tychonov Y and ßX\\X is sequential, then Y is normal. More... generally, if / is a continuous surjection from normal X onto regular Y and ßX\\X has the property that countably compact subsets are closed (this property is called C-closed), then Y is normal. There is an example of a normal space X such that ßX\\X is C...

  14. Dilatonic effects near naked singularities

    E-Print Network [OSTI]

    J. R. Morris

    2011-11-03

    Static spherically symmetric solutions of 4d Brans-Dicke theory include a set of naked singularity solutions. Dilatonic effects near the naked singularities result in either a shielding or an antishielding effect from intruding massive test particles. One result is that for a portion of the solution parameter space, no communication between the singularity and a distant observer is possible via massive particle exchanges. Kaluza-Klein gravity is considered as a special case.

  15. Tropical Africa: Land use, biomass, and carbon estimates for 1980

    SciTech Connect (OSTI)

    Brown, S.; Gaston, G.; Daniels, R.C.

    1996-06-01

    This document describes the contents of a digital database containing maximum potential aboveground biomass, land use, and estimated biomass and carbon data for 1980 and describes a methodology that may be used to extend this data set to 1990 and beyond based on population and land cover data. The biomass data and carbon estimates are for woody vegetation in Tropical Africa. These data were collected to reduce the uncertainty associated with the possible magnitude of historical releases of carbon from land use change. Tropical Africa is defined here as encompassing 22.7 x 10{sup 6} km{sup 2} of the earth`s land surface and includes those countries that for the most part are located in Tropical Africa. Countries bordering the Mediterranean Sea and in southern Africa (i.e., Egypt, Libya, Tunisia, Algeria, Morocco, South Africa, Lesotho, Swaziland, and Western Sahara) have maximum potential biomass and land cover information but do not have biomass or carbon estimate. The database was developed using the GRID module in the ARC/INFO{sup TM} geographic information system. Source data were obtained from the Food and Agriculture Organization (FAO), the U.S. National Geophysical Data Center, and a limited number of biomass-carbon density case studies. These data were used to derive the maximum potential and actual (ca. 1980) aboveground biomass-carbon values at regional and country levels. The land-use data provided were derived from a vegetation map originally produced for the FAO by the International Institute of Vegetation Mapping, Toulouse, France.

  16. A Model Evaluation Data Set for the Tropical ARM Sites

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Jakob, Christian

    2008-01-15

    This data set has been derived from various ARM and external data sources with the main aim of providing modelers easy access to quality controlled data for model evaluation. The data set contains highly aggregated (in time) data from a number of sources at the tropical ARM sites at Manus and Nauru. It spans the years of 1999 and 2000. The data set contains information on downward surface radiation; surface meteorology, including precipitation; atmospheric water vapor and cloud liquid water content; hydrometeor cover as a function of height; and cloud cover, cloud optical thickness and cloud top pressure information provided by the International Satellite Cloud Climatology Project (ISCCP).

  17. Differences Between Tropical and Trade-Wind Shallow Cumuli

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalent BondingMeetingDifferences Between Tropical and Trade-Wind Shallow

  18. A Model Evaluation Data Set for the Tropical ARM Sites

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Jakob, Christian

    This data set has been derived from various ARM and external data sources with the main aim of providing modelers easy access to quality controlled data for model evaluation. The data set contains highly aggregated (in time) data from a number of sources at the tropical ARM sites at Manus and Nauru. It spans the years of 1999 and 2000. The data set contains information on downward surface radiation; surface meteorology, including precipitation; atmospheric water vapor and cloud liquid water content; hydrometeor cover as a function of height; and cloud cover, cloud optical thickness and cloud top pressure information provided by the International Satellite Cloud Climatology Project (ISCCP).

  19. Volume 48 February 1984 The signature of an air gun array: Computation from near-field

    E-Print Network [OSTI]

    Volume 48 February 1984 GEOPHYSICS Number 2 The signature of an air gun array: Computation from of an interacting air gun array from near-field measurements of its pressure field. We use an iterative technique gun. In normal operation the forward motion of the hy- drophones and upward motion of the air gun

  20. Tropical Cyclone Wind Retrievals from the Advanced Microwave Sounding Unit: Application to Surface Wind Analysis

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    Tropical Cyclone Wind Retrievals from the Advanced Microwave Sounding Unit: Application to Surface Wind Analysis KOTARO BESSHO Japan Meteorological Agency/Meteorological Research Institute, Tsukuba City winds at 850 hPa from tropical cyclones retrieved using the nonlinear balance equation, where the mass

  1. Estimation of tropical forest structural characteristics using large-footprint lidar

    E-Print Network [OSTI]

    Weishampel, John F.

    Estimation of tropical forest structural characteristics using large-footprint lidar Jason B in identifying the amount of carbon in terrestrial vegetation pools and is central to global carbon cycle studies. Although current remote sensing techniques recover such tropical forest structure poorly, new large-footprint

  2. Energy dynamics and modeled evapotranspiration from a wet tropical forest in Costa Rica

    E-Print Network [OSTI]

    Energy dynamics and modeled evapotranspiration from a wet tropical forest in Costa Rica H). #12;1. Introduction The energy balance of tropical forests is complex due to feedback mechanisms among.W. Loeschera, *, H.L. Gholza,b , J.M. Jacobsc , S.F. Oberbauerd,e a School of Forest Resources and Conservation

  3. 130 Florida Entomologist 93(1) March 2010 BIOLOGICAL CONTROL OF TROPICAL SODA APPLE

    E-Print Network [OSTI]

    Ma, Lena

    130 Florida Entomologist 93(1) March 2010 BIOLOGICAL CONTROL OF TROPICAL SODA APPLE (SOLANACEAE for natural ene- mies of the invasive plant tropical soda apple, Solanum viarum Dunal (Solanaceae) were con apple in Brazil and Paraguay (Medal et al. 1996). A biological control program was initiated

  4. A Climatology of Tropical Anvil and Its Relationship to the Large-Scale Circulation 

    E-Print Network [OSTI]

    Li, Wei

    2011-02-22

    of anvil formation, and to provide a more realistic assessment of the radiative impact of tropical anvil on the large-scale circulation. Based on 10 years (1998-2007) of observations, anvil observed by the Tropical Rainfall Measuring Mission (TRMM...

  5. Stem respiration in tropical forests along an elevation gradient in the Amazon and Andes

    E-Print Network [OSTI]

    Malhi, Yadvinder

    Stem respiration in tropical forests along an elevation gradient in the Amazon and Andes A M A N D metabolism, resulting in the release of carbon dioxide as a by-product. Little is known of how autotrophic respiration components vary across environmental gradients, particularly in tropical ecosystems. Here, we

  6. Effects of ozone cooling in the tropical lower stratosphere and upper troposphere

    E-Print Network [OSTI]

    Effects of ozone cooling in the tropical lower stratosphere and upper troposphere Piers M. Forster lower stratosphere and upper troposphere and elucidate the key role of ozone changes in driving of tropical ozone decreases at 70 hPa and lower pressures can lead to significant cooling not only

  7. Intermediate Zonal Jets in the Tropical Pacific Ocean Observed by Argo Floats* SOPHIE CRAVATTE

    E-Print Network [OSTI]

    Boyer, Edmond

    Intermediate Zonal Jets in the Tropical Pacific Ocean Observed by Argo Floats* SOPHIE CRAVATTE´veloppement, LEGOS, Toulouse, France WILLIAM S. KESSLER National Oceanic and Atmospheric Administration/Pacific Argo float data in the tropical Pacific Ocean during January 2003­August 2011 are analyzed to obtain

  8. Tropical Moored Buoy Implementation Panel (TIP) Report Michael J. McPhaden, TIP Chairman

    E-Print Network [OSTI]

    Tropical Moored Buoy Implementation Panel (TIP) Report Michael J. McPhaden, TIP Chairman NOAA Michael McPhaden, chairman of the Tropical Moored Buoy Implementation Panel (TIP), briefed the panel on three topics: 1) the current successes of the TAO/TRITON partnership in maintaining the moored buoy

  9. U.S Markets for Certified and Non-Certified Hardwood Tropical Forest Products

    E-Print Network [OSTI]

    in the fact that tropical forests have a longer growing period, hence encouraging the paper industry to use tropical hardwood pulp for paper production (U.S. and International Institutions 1983). In 2000, the United Agricultural Center Baton Rouge, Louisiana Louisiana Forest Products Development Center Working Paper #76

  10. United States and Caribbean tropical cyclone activity related to the solar cycle

    E-Print Network [OSTI]

    Elsner, James B.

    United States and Caribbean tropical cyclone activity related to the solar cycle J. B. Elsner1 related to solar activity. The relationship results from fewer intense tropical cyclones over the Caribbean and Gulf of Mexico when sunspot numbers are high. The finding is in accord with the heat- engine

  11. Auritella foveata, a new species of Inocybaceae (Agaricales) from tropical India

    E-Print Network [OSTI]

    Matheny, P. Brandon

    Auritella foveata, a new species of Inocybaceae (Agaricales) from tropical India P. Brandon Matheny & Matheny is described as new from mixed evergreen forests in tropical India. The species is distinctive due, systematics. Introduction India is exceedingly rich in fungal diversity (Manoharachary et al. 2005). Indeed

  12. THE EXTENT AND CAUSES OF ILLEGAL LOGGING: AN ANALYSIS OF A MAJOR CAUSE OF TROPICAL

    E-Print Network [OSTI]

    THE EXTENT AND CAUSES OF ILLEGAL LOGGING: AN ANALYSIS OF A MAJOR CAUSE OF TROPICAL DEFORESTATION;2 THE EXTENT AND CAUSES OF ILLEGAL LOGGING: AN ANALYSIS OF A MAJOR CAUSE OF TROPICAL DEFORESTATION IN INDONESIA (CIFOR). ISSN 0967-8875 #12;3 Abstract: This paper considers the scale and underlying causes of recent

  13. Cloud properties and associated radiative heating rates in the tropical western Pacific

    E-Print Network [OSTI]

    Cloud properties and associated radiative heating rates in the tropical western Pacific James H radiative fluxes and heating rates. Maxima in cloud occurrence are found in the boundary layer and the upper radiative heating rates in the tropical western Pacific, J. Geophys. Res., 112, D05201, doi:10.1029/2006JD

  14. Tropical ozone as an indicator of deep convection Ian Folkins and Christopher Braun

    E-Print Network [OSTI]

    Folkins, Ian

    Tropical ozone as an indicator of deep convection Ian Folkins and Christopher Braun Department] The climatological ozone profile in the tropics is shaped like an ``S,'' with a minimum at the surface, a maximum. These features can be reproduced by a very simple model whose only free parameter is the mean ozone mixing ratio

  15. Tropical timber import export Africa Asia volume Congo India Nigeria Papua New Guinea & the Solomon Islands

    E-Print Network [OSTI]

    Tropical timber import export Africa Asia volume Congo India Nigeria Papua New Guinea & the Solomon/14/2008 12:55:54 PM] #12;Tropical timber import export Africa Asia volume Congo India Nigeria Volume ('000 m3 import export Africa Asia volume Congo India Nigeria Papua New Guinea Reports (commissioned

  16. An overview of coupled GCM biases in the tropics Ingo Richter1,2

    E-Print Network [OSTI]

    tropical South America and un- derpredict it over tropical Africa. Despite cold SST biases over much), excessive shortwave solar radiation due to insufficient low- level cloud, and weak oceanic stratification biases affect seasonal forecasts and climate change projections, in order to maximize their utility

  17. Shipboard Measurements and Estimations of AirSea Fluxes in the Western Tropical Pacific Ocean

    E-Print Network [OSTI]

    California at Irvine, University of

    Ship­board Measurements and Estimations of Air­Sea Fluxes in the Western Tropical Pacific Ocean E dur­ ing the Tropical Ocean Global Atmosphere (TOGA) Coupled Ocean and Atmospheric Response of the surface­layer turbulence properties are compared with those from previous land and ocean results. Momentum

  18. Tropical Cyclogenesis Associated with Rossby Wave Energy Dispersion of a Preexisting Typhoon. Part II: Numerical Simulations*

    E-Print Network [OSTI]

    Wang, Bin

    Tropical Cyclogenesis Associated with Rossby Wave Energy Dispersion of a Preexisting Typhoon. Part (1987) and Fiorino and Els- berry (1989) showed that a cyclonic vortex experiences Rossby wave energy) ABSTRACT The cyclogenesis events associated with the tropical cyclone (TC) energy dispersion are simulated

  19. SCALAR WIND SPEED AND DIRECTION TROPICAL CYCLONE RETRIEVALS FOR CONICAL SCANNING SCATTEROMETERS

    E-Print Network [OSTI]

    Hennon, Christopher C.

    SCALAR WIND SPEED AND DIRECTION TROPICAL CYCLONE RETRIEVALS FOR CONICAL SCANNING SCATTEROMETERS--Scatterometer measurements of ocean vector winds (OVW) are significantly degraded in the presence of the precipitation, especially in tropical cyclones. This paper presents a new ocean hurricane/typhoon wind vector retrieval

  20. Mesoscale Simulation of Tropical Cyclones in the South Pacific: Climatology and Interannual Variability

    E-Print Network [OSTI]

    Mesoscale Simulation of Tropical Cyclones in the South Pacific: Climatology and Interannual is shown to reproduce a wide range of mesoscale convective systems. Tropical cyclones grow from the most related to mesoscale in- teractions, which also affect TC tracks and the resulting occurrence. 1

  1. Very high resolution precipitation climatologies from the Tropical Rainfall Measuring Mission precipitation radar

    E-Print Network [OSTI]

    Nesbitt, Steve

    Very high resolution precipitation climatologies from the Tropical Rainfall Measuring Mission precipitation radar Stephen W. Nesbitt1 and Alison M. Anders2 Received 4 March 2009; revised 6 July 2009 of topography and precipitation, a tropics-wide (±36° latitude) high resolution (0.1°) ten year (1998

  2. Minimal left ideals of centralizer near-rings 

    E-Print Network [OSTI]

    Gilliam, Debbie Irene

    1981-01-01

    such that f(b) f 0. Lame 2. 2: L t 2 and be such that )aero) 2. Choose b, c g im o. Then b+c c im o. Proof: (G:im u5 = 2 since oker oI = 2 by the first isomorphism theorem. This implies that im 22 is a normal subgroup of G and thus that IG/im al = 2...(S;6) gives us that g is in C(S;G) since 9(b2) = b2 k. Now Q(b2) = h(k2 bZ k)-h(b2 k) = h(bl+k)-h(b2+k) = 0, b? g(bl) = h(kl+bl)-h(bl) = h(b2)-h(bl) = -k. so IG(g)l = I and M = Mb. Suppose, however, that K = (O, k). Here r(bl) = r(b2) = r...

  3. Lyapunov Exponents and Uniform Weak Normally Repelling Invariant Sets

    E-Print Network [OSTI]

    Smith, Hal

    Lyapunov Exponents and Uniform Weak Normally Repelling Invariant Sets Paul Leonard Salceanu and Hal repelling in directions normal to the boundary in which M resides provided all normal Lyapunov exponents that Lyapunov exponents can be used to establish the requisite repelling properties for both discrete

  4. Two tests for multivariate normality based on the characteristic function

    E-Print Network [OSTI]

    Arcones, Miguel A.

    Two tests for multivariate normality based on the characteristic function Miguel A. Arcones-mail:arcones@math.binghamton.edu April 10, 2007 Abstract We present two tests for multivariate normality. The presented tests are based on the L´evy characterization of the normal distribution and on the BHEP tests. The tests are affine

  5. Proper orthogonal decomposition approach and error estimation of mixed finite element methods for the tropical Pacific Ocean

    E-Print Network [OSTI]

    Navon, Michael

    for the tropical Pacific Ocean reduced gravity model Zhendong Luo a , Jiang Zhu b , Ruiwen Wang b , I.M. Navon c Available online 8 May 2007 Abstract In this paper, the tropical Pacific Ocean reduced gravity model and the insufficient knowledge of air­sea exchange processes. The tropical Pacific Ocean reduced gravity model

  6. Fractal Fluctuations and Statistical Normal Distribution

    E-Print Network [OSTI]

    A. M. Selvam

    2008-05-22

    Dynamical systems in nature exhibit selfsimilar fractal fluctuations and the corresponding power spectra follow inverse power law form signifying long-range space-time correlations identified as self-organized criticality. The physics of self-organized criticality is not yet identified. The Gaussian probability distribution used widely for analysis and description of large data sets underestimates the probabilities of occurrence of extreme events such as stock market crashes, earthquakes, heavy rainfall, etc. The assumptions underlying the normal distribution such as fixed mean and standard deviation, independence of data, are not valid for real world fractal data sets exhibiting a scale-free power law distribution with fat tails. A general systems theory for fractals visualizes the emergence of successively larger scale fluctuations to result from the space-time integration of enclosed smaller scale fluctuations. The model predicts a universal inverse power law incorporating the golden mean for fractal fluctuations and for the corresponding power spectra, i.e., the variance spectrum represents the probabilities, a signature of quantum systems. Fractal fluctuations therefore exhibit quantum-like chaos. The model predicted inverse power law is very close to the Gaussian distribution for small-scale fluctuations, but exhibits a fat long tail for large-scale fluctuations. Extensive data sets of Dow Jones index, Human DNA, Takifugu rubripes (Puffer fish) DNA are analysed to show that the space/time data sets are close to the model predicted power law distribution.

  7. Utilization of geothermal heat in tropical fruit-drying process

    SciTech Connect (OSTI)

    Chen, B.H.; Lopez, L.P.; King, R.; Fujii, J.; Tanaka, M.

    1982-10-01

    The power plant utilizes only the steam portion of the HGP-A well production. There are approximately 50,000 pounds per hour of 360/sup 0/F water produced (approximately 10 million Btu per hour) and the water is currently not used and is considered a waste. This tremendous resource could very well be used in applications such as food processing, food dehydration and other industrial processing that requires low-grade heat. One of the applications is examined, namely the drying of tropical fruits particularly the papaya. The papaya was chosen for the obvious reason that it is the biggest crop of all fruits produced on the Big Island. A conceptual design of a pilot plant facility capable of processing 1000 pounds of raw papaya per day is included. This facility is designed to provide a geothermally heated dryer to dehydrate papayas or other tropical fruits available on an experimental basis to obtain data such as drying time, optimum drying temperature, etc.

  8. Transmission resonances, quasi-normal modes and quasi-normal frequencies: Key analytic results

    E-Print Network [OSTI]

    Boonserm, Petarpa

    2010-01-01

    Exact solutions for transmission amplitudes and transmission probabilities, the existence of transmission resonances, and the closely related study of exact quasi-normal modes [QNMs] and quasi-normal frequencies [QNFs], has had a long and convoluted history - replete with many rediscoveries of previously known results. In this article we shall collect and survey a number of analytic results, and develop several new results, in a form amenable to comparison with the extant literature. In particular we shall discuss the delta-function potential, double-delta-function potential, and asymmetric double-delta-function potential; the step barrier, symmetric rectangular potential barrier, and asymmetric rectangular potential barrier; and then discuss the Eckart potential and its simplifications - the tanh potential and sech^2 potential. The history of the Eckart potential is particularly complicated: Apart from the special case of the Morse potential, other special cases and equivalent reformulations of Eckart's resu...

  9. The Use of Catalysts in Near-Critical Water Processing

    SciTech Connect (OSTI)

    Elliott, Douglas C.

    2005-06-26

    The use of heterogeneous catalysts in near-critical water processing provides many challenges of material stability in addition to the normal questions of chemical activity. Conventional catalyst materials developed in traditional organic chemistry or petroleum chemistry applications provide a source of information of materials with the required activities but often without the required stability when used in hot liquid water. The importance of the use of catalysts in near-critical water processing plays a particularly crucial role for the development of renewable fuels and chemicals based on biomass feedstocks. Stability issues include both those related to the catalytic metal and also to the catalyst support material. In fact, the stability of the support is the most likely concern when using conventional catalyst formulations in near-critical water processing. Processing test results are used to show important design parameters for catalyst formulations for use in wet biomass gasification in high-pressure water and in catalytic hydrogenations in water for production of value-added chemical products from biomass in the biorefinery concept. Analytical methods including powder x-ray diffraction for crystallite size and composition determination, surface area and porosity measurements, and elemental analysis have all been used to quantify differences in catalyst materials before and after use. By these methods both the chemical and physical stability of heterogeneous catalysts can be verified.

  10. Management of Philippine tropical forests: Implications to global warming

    SciTech Connect (OSTI)

    Lasco, R.D.

    1997-12-31

    The first part of the paper presents the massive changes in tropical land management in the Philippines as a result of a {open_quotes}paradigm shift{close_quotes} in forestry. The second part of the paper analyzes the impacts of the above management strategies on global warming, in general, preserved forests are neither sinks not sources of greenhouse gasses (GHG). Reforestation activities are primarily net sinks of carbon specially the use of fast growing reforestation species. Estimates are given for the carbon-sequestering ability of some commonly used species. The last part of the paper policy recommendations and possible courses of action by the government to maximize the role of forest lands in the mitigation of global warming. Private sector initiatives are also explored.

  11. Can the vertical motions in the eyewall of tropical cyclones support persistent UAV flight?

    E-Print Network [OSTI]

    Poh, Chung-Kiak

    2014-01-01

    Powered flights in the form of manned or unmanned aerial vehicles (UAVs) have been flying into tropical cyclones to obtain vital atmospheric measurements with flight duration typically lasting between 12 and 36 hours. Convective vertical motion properties of tropical cyclones have previously been studied. This work investigates the possibility to achieve persistent flight by harnessing the generally pervasive updrafts in the eyewall of tropical cyclones. A sailplane UAV capable of vertical take-off and landing (VTOL) is proposed and its flight characteristics simulated. Results suggest that the concept of persistent flight within the eyewall is promising and may be extendable to the rainband regions.

  12. Near approximations via general ordered topological spaces

    E-Print Network [OSTI]

    M. Abo-Elhamayel

    2014-12-27

    Rough set theory is a new mathematical approach to imperfect knowledge. The notion of rough sets is generalized by using an arbitrary binary relation on attribute values in information systems, instead of the trivial equality relation. The topology induced by binary relations is used to generalize the basic rough set concepts. This paper studies near approximation via general ordered topological approximation spaces which may be viewed as a generalization of the study of near approximation from the topological view. The basic concepts of some increasing (decreasing) near approximations, increasing (decreasing) near boundary regions and increasing (decreasing) near accuracy were introduced and sufficiently illustrated. Moreover, proved results, implications and add examples.

  13. Some results on embeddings of near rings 

    E-Print Network [OSTI]

    McCracken, John David

    1970-01-01

    ideal in the ring with identity. Of the d. g. near rings exhibited in ~ 2] only 429 ot Section 2. 5 cannot be embedded by one of the techniques presented in [3]. The purpose of this thesis is to evhib- it an embedding of this near ring as a right... in formu) ating a general technique f or embedding d. g. near rings as rioht ideals in d. g. near rings with left identities. CHAPTER II THE EMBEDDING OF R The near ring R given as 429 in Section 2. 5 of L2] is displayed in Table I. It should...

  14. Normal Conditions of Transport Truck Test of a Surrogate Fuel...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Normal Conditions of Transport Truck Test of a Surrogate Fuel Assembly. McConnell, Paul E.; Wauneka, Robert; Saltzstein, Sylvia J.; Sorenson, Ken B. Abstract not provided. Sandia...

  15. Log-normal distribution for correlators in lattice QCD?

    E-Print Network [OSTI]

    Thomas DeGrand

    2012-04-20

    Many hadronic correlators used in spectroscopy calculations in lattice QCD simulations appear to show a log-normal distribution at intermediate time separations.

  16. Genome Wide Evaluation of Normal Human Tissue in Response to...

    Office of Scientific and Technical Information (OSTI)

    Wide Evaluation of Normal Human Tissue in Response to Controlled, In vivo Low-Dose Low LET Ionizing Radiation Exposure: Pathways and Mechanisms Final Report, September 2013 Rocke,...

  17. Flavor dependence of normalization constant for an infrared renormalon

    E-Print Network [OSTI]

    Taekoon Lee

    2015-02-09

    An ansatz is proposed for the flavor dependence of the normalization constant for the first IR renormalon in heavy quark pole mass.

  18. Neural Effects of Beta Amyloid in Normal Aging

    E-Print Network [OSTI]

    Mormino, Elizabeth Charlotte

    2011-01-01

    age   categories.  Neurobiol  Aging  1997;  18:  351-­?7.  JK,  McIntosh  AR.  Aging  gracefully:  compensatory  B.  The  effect  of  normal  aging  on  the  coupling  of  

  19. Used Nuclear Fuel Loading and Structural Performance Under Normal...

    Energy Savers [EERE]

    Used Nuclear Fuel Loading and Structural Performance Under Normal Conditions of Transport - Modeling, Simulation and Experimental Integration RD&D Plan Used Nuclear Fuel Loading...

  20. Fault interaction near Hollister, California

    SciTech Connect (OSTI)

    Mavko, G.M.

    1982-09-10

    A numerical model is used to study fault stress slip near Hollister, California. The geometrically complex system of interacting faults, including the San Andreas, Calaveras, Sargent, and Busch faults, is approximated with a two-dimensional distribution of short planar fault segments in an elastic medium. The steady stress and slip rate are simulated by specifying frictional strength and stepping the remote stress ahead in time. The resulting computed fault stress is roughly proportional to the observed spatial density of small earthquakes, suggesting that the distinction between segments characterized by earthquakes and those with aseismic creep results, in part, from geometry. A nonsteady simulation is made by introducing, in addition, stress drops for individual moderate earthquakes. A close fit of observed creep with calculated slip on the Calaveras and San Andreas faults suggests that many changes in creep rate (averaged over several months) are caused by local moderate earthquakes. In particular, a 3-year creep lag preceding the August 6, 1979, Coyote Lake earthquake on the Calaveras fault seems to have been a direct result of the November 28, 1974, Thanksgiving Day earthquake on the Busch fault. Computed lags in slip rate preceding some other moderate earthquakes in the area are also due to earlier earthquakes. Although the response of the upper 1 km of the fault zone may cause some individual creep events and introduce delays in others, the long-term rate appears to reflect deep slip.

  1. Near-infrared line identification in type Ia supernovae during the transitional phase

    SciTech Connect (OSTI)

    Friesen, Brian; Baron, E.; Wisniewski, John P.; Miller, Timothy R. [Homer L. Dodge Department of Physics and Astronomy, 440 West Brooks Street, Room 100, Norman, OK 73019 (United States); Parrent, Jerod T. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Thomas, R. C. [Computational Cosmology Center, Computational Research Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road MS 50B-4206, Berkeley, CA 94720 (United States); Marion, G. H. [University of Texas at Austin, 1 University Station C1400, Austin, TX 78712-0259 (United States)

    2014-09-10

    We present near-infrared synthetic spectra of a delayed-detonation hydrodynamical model and compare them to observed spectra of four normal Type Ia supernovae ranging from day +56.5 to day +85. This is the epoch during which supernovae are believed to be undergoing the transition from the photospheric phase, where spectra are characterized by line scattering above an optically thick photosphere, to the nebular phase, where spectra consist of optically thin emission from forbidden lines. We find that most spectral features in the near-infrared can be accounted for by permitted lines of Fe II and Co II. In addition, we find that [Ni II] fits the emission feature near 1.98 ?m, suggesting that a substantial mass of {sup 58}Ni exists near the center of the ejecta in these objects, arising from nuclear burning at high density.

  2. S17 near Zero Energy in a Direct Radiative Capture Analysis

    E-Print Network [OSTI]

    Kyung Hoon Kim

    2011-10-23

    S17 near zero energy was calculated without using the effective expansion of the S factor or the asymptotic wave functions. Variations of the nuclear potential parameters scarcely affect the d-wave capture cross section below 0.1 MeV, but the s-wave capture cross section near zero energy is affected strongly by the shape of the nuclear potential in our calculations. This result is contrary to the existing assumption that the value of the S factor near zero energy depends on the asymptotic wave function (or asymptotic normalization coefficient). We showed that although the s-wave contribution is dominant near zero energy, the d-wave contribution is not negligible.

  3. Stress-dependent normal mode frequencies from the effective mass of granular matter

    E-Print Network [OSTI]

    Yanqing Hu; David L. Johnson; John J. Valenza; Francisco Santibanez; Hernán A. Makse

    2014-10-20

    A zero-temperature critical point has been invoked to control the anomalous behavior of granular matter as it approaches jamming or mechanical arrest. Criticality manifests itself in an anomalous spectrum of low-frequency normal modes and scaling behavior near the jamming transition. The critical point may explain the peculiar mechanical properties of dissimilar systems such as glasses and granular materials. Here, we study the critical scenario via an experimental measurement of the normal modes frequencies of granular matter under stress from a pole decomposition analysis of the effective mass. We extract a complex-valued characteristic frequency which displays scaling $|\\omega^*(\\sigma)|\\sim\\sigma^{\\Omega'}$ with vanishing stress $\\sigma$ for a variety of granular systems. The critical exponent is smaller than that predicted by mean-field theory opening new challenges to explain the exponent for frictional and dissipative granular matter. Our results shed light on the anomalous behavior of stress-dependent acoustics and attenuation in granular materials near the jamming transition.

  4. Tropical Pacific response to 20th century Atlantic warming F. Kucharski,1

    E-Print Network [OSTI]

    Kang, In-Sik

    and L. Feudale1 Received 16 November 2010; accepted 13 December 2010; published 1 February 2011. [1. Feudale (2011), Tropical Pacific response to 20th century Atlantic warming, Geophys. Res. Lett., 38, L

  5. The tropical cyclone-induced flux of carbon between the ocean and the atmosphere

    E-Print Network [OSTI]

    Zimmerman, Neil L

    2012-01-01

    Tropical cyclones are known to cause phytoplankton blooms in regions of the ocean that would otherwise support very little life; it is also known that these storms entrain carbon-rich deep water, which can cause ...

  6. Tropical cyclones within the sedimentary record : analyzing overwash deposition from event to millennial timescales

    E-Print Network [OSTI]

    Woodruff, Jonathan Dalrymple

    2009-01-01

    Tropical cyclone activity over the last 5000 years is investigated using overwash sediments from coastal lagoons on the islands of Vieques, Puerto Rico and Koshikijima, Japan. A simple sediment transport model can reproduce ...

  7. Do Gravity Waves Transport Angular Momentum away from Tropical Cyclones? YUMIN MOON AND DAVID S. NOLAN

    E-Print Network [OSTI]

    Nolan, David S.

    Do Gravity Waves Transport Angular Momentum away from Tropical Cyclones? YUMIN MOON AND DAVID S be represented solely as vorticity perturbations. For this reason, these studies (e.g., Carr and Williams 1989

  8. Population Dynamics and Tropical Deforestation: State of the Debate and Conceptual Challenges

    E-Print Network [OSTI]

    Lopez-Carr, David

    ); population. Please address correspondence to David L. Carr, University of California, Santa Barbara, CA, USAPopulation Dynamics and Tropical Deforestation: State of the Debate and Conceptual Challenges David L. Carr Laurel Suter University of California Alisson Barbieri Carolina Population Center What

  9. Tropical Storm Frances Situation Report, September 8, 2004 (10:00 PM EDT)

    SciTech Connect (OSTI)

    None

    2004-09-08

    The report provides highlights related to impacts of Tropical Storm Frances n the Florida area. Sections on electric information, oil and gas information, and county outage data are provided.

  10. Assessing impact of the sulfate aerosol first indirect effect on tropical cyclone activity

    E-Print Network [OSTI]

    Chang, Hao-yu Derek

    2015-01-01

    Tropical cyclones (TCs) are among the most expensive and lethal geophysical hazards. Studies suggest that the intensity of TCs will increase due to the thermodynamic effects of anthropogenic greenhouse gas input. In contrast, ...

  11. Connections between deep tropical clouds and the Earth's ionosphere M. E. Hagan,1

    E-Print Network [OSTI]

    California at Berkeley, University of

    Connections between deep tropical clouds and the Earth's ionosphere M. E. Hagan,1 A. Maute,1 R. G troposphere. Citation: Hagan, M. E., A. Maute, R. G. Roble, A. D. Richmond, T. J. Immel, and S. L. England

  12. Tropical Moored Buoy Implementation Panel (TIP) Report Michael J. McPhaden, TIP Chairman

    E-Print Network [OSTI]

    1 Tropical Moored Buoy Implementation Panel (TIP) Report Michael J. McPhaden, TIP Chairman NOAA-Ocean Buoy Network) moored buoy array is designed to provide high quality data in real-time for improved

  13. The biogeochemistry of tropical lakes: A case study from Lake Matano, Indonesia

    E-Print Network [OSTI]

    Crowe, S. A.; O'Neill, A. H.; Katsev, S.; Hehanussa, P.; Haffner, G. Douglas; Sundby, Bjorn; Mucci, Alfonso; Fowle, David A.

    2008-01-16

    We examined the chemical composition of the water column of Lake Matano, Sulawesi Island, Indonesia, to document how the high abundances of Fe (hydr)oxides in tropical soils and minimal seasonal temperature variability affect biogeochemical cycling...

  14. 13. Tropical Cyclone Landfall Experiment Principal Investigators: John Kaplan Peter Dodge

    E-Print Network [OSTI]

    97! 13. Tropical Cyclone Landfall Experiment ! Principal Investigators: John Kaplan Peter Dodge operational statistical models (such as the Kaplan/DeMaria decay model) and numerical models like the HWRF

  15. Organic farming practices for rice under diversified cropping systems in humid tropics.

    E-Print Network [OSTI]

    Varughese, Kuruvilla Dr; Rani, B Dr; Abraham, Suja; John, Jacob Dr; M, Vijayan Dr

    2009-01-01

    HTM (accessed on 15-1- KAU (Kerala Agricultural University).Crops. (2002) 12 th edition, Kerala Agricultural University,humid tropical regions of Kerala there is a reduction in

  16. On the role of wind driven ocean dynamics in tropical Atlantic variability 

    E-Print Network [OSTI]

    Da Silva, Meyre Pereira

    2006-08-16

    The response of the tropical Atlantic Ocean to wind stress forcing on seasonal and interannual time scales is examined using an ocean data assimilation product from the Geophysical Fluid Dynamics Laboratory (GFDL), and an ocean general circulation...

  17. Extreme rainfall intensities and long-term rainfall risk from tropical cyclones

    E-Print Network [OSTI]

    Langousis, Andreas, 1981-

    2009-01-01

    We develop a methodology for the frequency of extreme rainfall intensities caused by tropical cyclones (TCs) in coastal areas. The mean rainfall field associated with a TC with maximum tangential wind speed Vmax, radius ...

  18. Downscaling CMIP5 climate models shows increased tropical cyclone activity over the 21st century

    E-Print Network [OSTI]

    Emanuel, Kerry Andrew

    A recently developed technique for simulating large [O(10[superscript 4])] numbers of tropical cyclones in climate states described by global gridded data is applied to simulations of historical and future climate states ...

  19. Tropical Storm Frances Situation Report, September 8, 2004 (10:00 AM EDT)

    SciTech Connect (OSTI)

    2004-09-08

    The report provides highlights related to impacts of Tropical Storm Frances in the Florida area. Sections on electric information, oil and gas information, and county outage data are provided.

  20. Tropical Storm Frances Situation Report, September 7, 2004 (10:00 PM EDT)

    SciTech Connect (OSTI)

    2004-09-07

    The report provides highlights related to impacts of Tropical Storm Frances in the Florida area. Sections on electric information, oil and gas information, storm track, and county outage data are provided.

  1. Leaf traits and foliar CO2 exchange in a Peruvian tropical montane cloud forest 

    E-Print Network [OSTI]

    Van de Weg, Marjan

    2011-06-28

    Tropical montane cloud forests (TMCF) are one of the most fascinating, but least understood ecosystems in the world, and the interest in the carbon (C) cycle of TMCFs with regard to carbon sequestration and storage ...

  2. Does It Make Sense To Modify Tropical Cyclones? A Decision-Analytic Assessment

    E-Print Network [OSTI]

    Klima, Kelly

    Recent dramatic increases in damages caused by tropical cyclones (TCs) and improved understanding of TC physics have led DHS to fund research on intentional hurricane modification. We present a decision analytic assessment ...

  3. Alkyl nitrate (C 1 -C 3 ) depth profiles in the tropical Pacific Ocean

    E-Print Network [OSTI]

    Dahl, E. E; Yvon-Lewis, S. A; Saltzman, E. S

    2007-01-01

    Experiment (WOCE), vol. 2, Pacific Ocean DRAFT, edited by M.over the equatorial Pacific Ocean during SAGA 3, J. Geophys.the troposphere over the Pacific Ocean during PEM- Tropics A

  4. Reduced impact logging minimally alters tropical rainforest carbon and energy exchange

    E-Print Network [OSTI]

    2011-01-01

    Brazil | Amazon | land use | micrometeorology D eforestation in the tropics affects the land–atmosphere ex- change of trace gases and energyand energy (W·m ?2 ) ?uxes, calculated as (? = logged ? unlogged), in Tapajos National Forest, Para, Brazil.

  5. Diatom-based Late Quaternary precipitation record for lowland tropical South America 

    E-Print Network [OSTI]

    Fitzpatrick, Katharine Anne

    2012-06-25

    The late Quaternary palaeoclimatic history of the lowland Southern Hemisphere Tropics of South America (SHTSA) has been little studied and analysis of key climatic events, such as the Last Glacial Maximum (centred ~ ...

  6. Energy and Cost Associated with Ventilating Office Buildings in a Tropical Climate

    E-Print Network [OSTI]

    Rim, Donghyun; Schiavon, Stefano; Nazaroff, William W

    2015-01-01

    Building Ventilation and Energy Use in Tropical Climatesbuildings. Florida Solar Energy Center. USDOE (2011) ReportReview. U.S. Department of Energy. Pérez-Lombard L, Ortiz J,

  7. The effect of subsurface temperature variability on the predictability of SST in the tropical Atlantic Ocean 

    E-Print Network [OSTI]

    Bates, Susan Carr

    1999-01-01

    The role of thermocouple variability and its effects on tropical Atlantic SST is investigated through the generation of SST predictions using a linear inverse modeling technique developed by Penland (1989). In order to ...

  8. Analysis of TRMM Precipitation Radar Algorithms and Rain over the Tropics and Southeast Texas 

    E-Print Network [OSTI]

    Funk, Aaron

    2013-12-10

    The Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) 2A23 algorithm classifies rain echo as stratiform or convective while the 2A25 algorithm corrects vertical profiles of radar reflectivity for attenuation ...

  9. Statistical Relationships of the Tropical Rainfall Measurement Mission (TRMM) Precipitation and Large-scale Flow 

    E-Print Network [OSTI]

    Borg, Kyle

    2010-07-14

    The relationship between precipitation and large-flow is important to understand and characterize in the climate system. We examine statistical relationships between the Tropical Rainfall Measurement Mission (TRMM) 3B42 ...

  10. Photo: Bruno Marty / IRD Observed and expected changes to the tropical

    E-Print Network [OSTI]

    Qiu, Bo

    simulations 104 3.2 Features of the tropical Pacific Ocean 105 3.2.1 Large-scale currents 105 3.2.2 Ocean.3 Observed and projected changes in the tropical Pacific Ocean 141 3.3.1 Large-scale currents 141 3.3.2 Ocean, dissolved oxygen concentration and pH affect biological activity; and oceanic currents, waves and sea level

  11. Airborne LiDAR Detects Selectively Logged Tropical Forest Even in an Advanced Stage of Recovery

    E-Print Network [OSTI]

    Kent, Rafi; Lindsell, Jeremy A.; Laurin, Gaia Vaglio; Valentini, Riccardo; Coomes, David A.

    2015-01-01

    logged tropical forests: the attained and the attainable. Conserv. Lett. 2012, 5, 296–303. 10. Silver, W. L.; Ostertag, R.; Lugo, a. E. The Potential for Carbon Sequestration Through Reforestation of Abandoned Tropical Agricultural and Pasture Lands... be of high conservation value [2,7–9] and act as globally-important carbon sinks [9–12]. However, there is much uncertainty regarding the changing extent of regenerating forests, their rate and stage of recovery, and the influence of recovery on further...

  12. Interactions of tropical synoptic-scale features as viewed from satellite 

    E-Print Network [OSTI]

    Winton, Susan Elizabeth

    1991-01-01

    INTERACTIONS OF TROPICAL SYNOPTIC-SCALE FEATURES AS VIEWED FROM SATELLITE Thesis by SUSAN ELIZABETH WINTON Submitted to tbe Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1991 Major Subject: Meteorology INTERACTIONS QF TROPICAL SYNOPTIC-SCALE FEATURES AS VIEWED FROM SATELLITE A Thesis by SUSAN ELIZABETH WINTON Approved as to style and content by: James P. McGuirk (Chair of Committee...

  13. Normal Basis Multiplication Algorithms for GF(2n ) (Full Version)

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    1 Normal Basis Multiplication Algorithms for GF(2n ) (Full Version) Haining Fan, Duo Liu and Yiqi. fan_haining@yahoo.com Abstract - In this paper, we propose a new normal basis multiplication algorithm for GF(2n ). This algorithm can be used to design not only fast software algorithms but also low

  14. Ordered Spaces all of whose Continuous Images are Normal

    E-Print Network [OSTI]

    Fleissner, William G.; Levy, Ronnie

    1989-01-01

    Some spaces, such as compact Hausdorff spaces, have the property that every regular continuous image is normal. In this paper, we look at such spaces. In particular, it is shown that if a normal space has finite Stone-Cech remainder, then every...

  15. N d'ordre: 011 Ecole Normale Suprieure de Lyon

    E-Print Network [OSTI]

    Benoit, Anne

    N d'ordre: 011 Ecole Normale Supérieure de Lyon Laboratoire de l'Informatique du Parallélisme recherches in Computer Science from Ecole Normale Supérieure de Lyon. Scheduling Pipelined Applications. Yves Robert Professor, ENS Lyon, France M. Denis Trystram Professor, IMAG, Grenoble, France #12

  16. DATA NORMALIZATION : A KEY FOR STRUCTURAL HEALTH MONITORING

    SciTech Connect (OSTI)

    Farrar, C. R. (Charles R.); Sohn, H. (Hoon); Worden, K.

    2001-01-01

    Structural health monitoring (SHM) is the implementation of a damage detection strategy for aerospace, civil and mechanical engineering infrastructure. Typical damage experienced by this infrastructure might be the development of fatigue cracks, degradation of structural connections, or bearing wear in rotating machinery. For SHM strategies that rely on vibration response measurements, the ability to normalize the measured data with respect to varying operational and environmental conditions is essential if one is to avoid false-positive indications of damage. Examples of common normalization procedure include normalizing the response measurements by the measured inputs as is commonly done when extracting modal parameters. When environmental cycles influence the measured data, a temporal normalization scheme may be employed. This paper will summarize various strategies for performing this data normalization task. These strategies fall into two general classes: (1) Those employed when measures of the varying environmental and operational parameters are available; (2) Those employed when such measures are not available. Whenever data normalization is performed, one runs the risk that the damage sensitive features to be extracted from the data will be obscured by the data normalization procedure. This paper will summarize several normalization procedures that have been employed by the authors and issues that have arose when trying to implement them on experimental and numerical data.

  17. Oil production models with normal rate curves Dudley Stark

    E-Print Network [OSTI]

    Stark, Dudley

    Oil production models with normal rate curves Dudley Stark School of Mathematical Sciences Queen;Abstract The normal curve has been used to fit the rate of both world and U.S.A. oil production. In this paper we give the first theoretical basis for these curve fittings. It is well known that oil field

  18. New Equipartition Results for Normal Mode Energies of Anharmonic Chains

    E-Print Network [OSTI]

    Henry, Bruce Ian

    New Equipartition Results for Normal Mode Energies of Anharmonic Chains B.I. Henry 1 and T. Szeredi 2;3 Date: 26 September 1995 The canonical and micro­canonical distribution of energy among. If the inter­particle potential is an even function then energy is distributed uniformly among the normal modes

  19. Banded Matrix Fraction Representation of Triangular Input Normal Pairs

    E-Print Network [OSTI]

    Banded Matrix Fraction Representation of Triangular Input Normal Pairs Andrew P. Mullhaupt #3 if and only if A is triangular and AA #3; + BB #3; = I n , where I n is the identity matrix. Input normal and A is a matrix fraction, A = M 1 N , where M and N are triangular matrices of low bandwidth. For single input

  20. On the normalization of the HBT correlation function

    E-Print Network [OSTI]

    D. Miskowiec; S. Voloshin

    1998-03-16

    We discuss the question of the normalization of the correlation function and its consistency with the often used form C(p1,p2) = 1+|f(p1,p2)|^2. We suggest an event mixing method which allows one to obtain absolutely normalized correlation functions from experimental data.

  1. Towards Direct Simulation of Future Tropical Cyclone Statistics in a High-Resolution Global Atmospheric Model

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Wehner, Michael F.; Bala, G.; Duffy, Phillip; Mirin, Arthur A.; Romano, Raquel

    2010-01-01

    We present a set of high-resolution global atmospheric general circulation model (AGCM) simulations focusing on the model's ability to represent tropical storms and their statistics. We find that the model produces storms of hurricane strength with realistic dynamical features. We also find that tropical storm statistics are reasonable, both globally and in the north Atlantic, when compared to recent observations. The sensitivity of simulated tropical storm statistics to increases in sea surface temperature (SST) is also investigated, revealing that a credible late 21st century SST increase produced increases in simulated tropical storm numbers and intensities in all ocean basins. Whilemore »this paper supports previous high-resolution model and theoretical findings that the frequency of very intense storms will increase in a warmer climate, it differs notably from previous medium and high-resolution model studies that show a global reduction in total tropical storm frequency. However, we are quick to point out that this particular model finding remains speculative due to a lack of radiative forcing changes in our time-slice experiments as well as a focus on the Northern hemisphere tropical storm seasons.« less

  2. Laser-induced differential normalized fluorescence method for cancer diagnosis

    DOE Patents [OSTI]

    Vo-Dinh, T.; Panjehpour, M.; Overholt, B.F.

    1996-12-03

    An apparatus and method for cancer diagnosis are disclosed. The diagnostic method includes the steps of irradiating a tissue sample with monochromatic excitation light, producing a laser-induced fluorescence spectrum from emission radiation generated by interaction of the excitation light with the tissue sample, and dividing the intensity at each wavelength of the laser-induced fluorescence spectrum by the integrated area under the laser-induced fluorescence spectrum to produce a normalized spectrum. A mathematical difference between the normalized spectrum and an average value of a reference set of normalized spectra which correspond to normal tissues is calculated, which provides for amplifying small changes in weak signals from malignant tissues for improved analysis. The calculated differential normalized spectrum is correlated to a specific condition of a tissue sample. 5 figs.

  3. Laser-induced differential normalized fluorescence method for cancer diagnosis

    DOE Patents [OSTI]

    Vo-Dinh, Tuan (Knoxville, TN); Panjehpour, Masoud (Knoxville, TN); Overholt, Bergein F. (Knoxville, TN)

    1996-01-01

    An apparatus and method for cancer diagnosis are disclosed. The diagnostic method includes the steps of irradiating a tissue sample with monochromatic excitation light, producing a laser-induced fluorescence spectrum from emission radiation generated by interaction of the excitation light with the tissue sample, and dividing the intensity at each wavelength of the laser-induced fluorescence spectrum by the integrated area under the laser-induced fluorescence spectrum to produce a normalized spectrum. A mathematical difference between the normalized spectrum and an average value of a reference set of normalized spectra which correspond to normal tissues is calculated, which provides for amplifying small changes in weak signals from malignant tissues for improved analysis. The calculated differential normalized spectrum is correlated to a specific condition of a tissue sample.

  4. Communications Near-Field Fluorescence Microscopy of

    E-Print Network [OSTI]

    ** By Grace M. Credo and Steven K. Buratto* We use near-field scanning optical microscopy (NSOM) to probe. Buratto, G. M. Credo Department of Chemistry U

  5. Near-Blackbody Enclosed Particle Receiver

    Broader source: Energy.gov [DOE]

    This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 23–25, 2013 near Phoenix, Arizona.

  6. Tropical waves in a GCM with zonal symmetry

    SciTech Connect (OSTI)

    Yip, K.J.J.; North, G.R. (Texas A M Univ., College Station, TX (United States))

    1993-09-01

    Tropical wave phenomena have been examined in the last 520 days of two 15-year runs of a low-resolution general circulation model (CCMO). The model boundary conditions were simplified to all-land, perpetual equinox, and no topography. The two runs were for fixed soil moisture at 75% and 0%, the so-called [open quotes]wet[close quotes] and [open quotes]dry[close quotes] models. Both models develop well-defined ITCZs with low-level convergence erratically concentrated along the equator. Highly organized eastward-propagating waves are detectable in both models with different wave speeds depending on the presence of moisture. The wave amplitudes (in, e.g., vertical velocity) are many orders of magnitude stronger in the wet model. The waves have a definite transverse nature as precipitation (low-level convergence) patches tend to move systematically north and south across the equator. In the wet model the waves are distinctly nondispersive and the transit time for passage around the earth is about 50 days, consistent with the Madden-Julian frequency. The authors are also able to see most of the expected linear wave modes in spectral density plots in the frequency-wavenumber plane and compare them for the wet and dry cases. 28 refs., 16 figs.

  7. Chemical composition of biomass from tall perennial tropical grasses

    SciTech Connect (OSTI)

    Prine, G.M.; Stricker, J.A.; Anderson, D.L.

    1995-11-01

    The tall perennial tropical grasses, elephantgrass (Pennisetum purpureum Schum.), sugarcane and energycane (Saccharum sp.) and erianthus (Erianthus arundenaceum (Retz) Jesw.) have given very high oven dry biomass yields in Florida and the warm Lower South USA. No good complete analyses of the chemical composition of these grasses for planning potential energy use was available. We sampled treatments of several tall grass demonstrations and experiments containing high-biomass yielding genotypes of the above tall grass crops at several locations in Florida over the two growing seasons, 1992 and 1993. These samples were analyzed for crude protein, NDF, ADF, cellulose, hemicellulose, lignin, and IVDMD or IVOMD. The analysis for the above constituents are reported, along with biomass yields where available, for the tall grass accessions in the various demonstrations and experiments. Particular attention is given to values obtained from the high-yielding tall grasses grown on phosphatic clays in Polk County, FL, the area targeted by a NREL grant to help commercialize bioenergy use from these crops.

  8. World Bank to raise $250M for avoided deforestation in tropics World Bank to raise $250M for avoided deforestation in tropics

    E-Print Network [OSTI]

    Street Journal. The $250 million fund will reward Indonesia, Brazil, Congo and other tropical forest argue that the Reducing Emissions from Deforestation (RED) initiative, launched in 2005 by the United their forests to offset greenhouse gas emissionsm. Meanwhile, last month Brazil -- which has the world's largest

  9. Patterns of water and heat flux across a biome gradient from tropical forest to savanna in Brazil

    E-Print Network [OSTI]

    2009-01-01

    variations in energy and carbon exchange over forest andexample, the energy stored in tropical forest biomass variedforest (JRU) and that illustrates the control that available energy

  10. Tropical biomass burning smoke plume size, shape, reflectance, and age based on 2001â??2009 MISR imagery of Borneo

    E-Print Network [OSTI]

    Zender, C. S.; Krolewski, A. G.; Tosca, M. G.; Randerson, J. T.

    2012-01-01

    C. S. Zender et al. : Tropical biomass burning smoke plumeslaboratory measurements of biomass-burning emis- sions: 1.aerosol optical depth biomass burning events: a comparison

  11. Tropical biomass burning smoke plume size, shape, reflectance, and age based on 2001-2009 MISR imagery of Borneo

    E-Print Network [OSTI]

    Zender, CS; Krolewski, AG; Tosca, MG; Randerson, JT

    2012-01-01

    C. S. Zender et al. : Tropical biomass burning smoke plumeslaboratory measurements of biomass-burning emis- sions: 1.aerosol optical depth biomass burning events: a comparison

  12. Statistical Inference for Models with Intractable Normalizing Constants 

    E-Print Network [OSTI]

    Jin, Ick Hoon

    2011-06-27

    In this dissertation, we have proposed two new algorithms for statistical inference for models with intractable normalizing constants: the Monte Carlo Metropolis-Hastings algorithm and the Bayesian Stochastic Approximation Monte Carlo algorithm...

  13. The normalization of citation counts based on classification systems

    E-Print Network [OSTI]

    Bornmann, Lutz; Barth, Andreas

    2013-01-01

    If we want to assess whether the paper in question has had a particularly high or low citation impact compared to other papers, the standard practice in bibliometrics is to normalize citations in respect of the subject category and publication year. A number of proposals for an improved procedure in the normalization of citation impact have been put forward in recent years. Against the background of these proposals this study describes an ideal solution for the normalization of citation impact: in a first step, the reference set for the publication in question is collated by means of a classification scheme, where every publication is associated with a single principal research field or subfield entry (e. g. via Chemical Abstracts sections) and a publication year. In a second step, percentiles of citation counts are calculated for this set and used to assign the normalized citation impact score to the publications (and also to the publication in question).

  14. Testicular function in normal and poor semen quality stallions 

    E-Print Network [OSTI]

    Bryan, Tina Michelle

    2006-04-12

    The chromosomal location of endocrine genes was established, and relationships between expression of specific endocrine genes and measures of testis function in normal and poor semen quality stallions was assessed. Consensus ...

  15. Mapping Technology Space by Normalizing Technology Relatedness Networks

    E-Print Network [OSTI]

    Alstott, Jeff; Yan, Bowen; Luo, Jianxi

    2015-01-01

    Technology is a complex system, with technologies relating to each other in a space that can be mapped as a network. The technology relatedness network's structure can reveal properties of technologies and of human behavior, if it can be mapped accurately. Technology networks have been made from patent data, using several measures of relatedness. These measures, however, are influenced by factors of the patenting system that do not reflect technologies or their relatedness. We created technology networks that precisely controlled for these impinging factors and normalized them out, using data from 3.9 million patents. The normalized technology relatedness networks were sparse, with only ~20% of technology domain pairs more related than would be expected by chance. Different measures of technology relatedness became more correlated with each other after normalization, approaching a single dimension of technology relatedness. The normalized network corresponded with human behavior: we analyzed the patenting his...

  16. Electron transport in normal-metal/superconductor junctions 

    E-Print Network [OSTI]

    Yan, XZ; Zhao, HW; Hu, Chia-Ren.

    2000-01-01

    On the basis of the Keldysh method of nonequilibrium systems, we develop a theory of electron tunneling in normal-metal-superconductor junctions. By using the tunneling Hamiltonian model (being appropriate for the tight-binding systems...

  17. NORMALITY OF NILPOTENT VARIETIES IN E6 ERIC SOMMERS

    E-Print Network [OSTI]

    Sommers, Eric

    NORMALITY OF NILPOTENT VARIETIES IN E6 ERIC SOMMERS ABSTRACT. We determine which nilpotent orbits for a careful reading of the paper leading to its improvement. 1 #12;2 ERIC SOMMERS Our proof is direct

  18. Converting normal insulators into topological insulators via tuning orbital levels

    E-Print Network [OSTI]

    Shi, Wu-Jun

    Tuning the spin-orbit coupling strength via foreign element doping and modifying bonding strength via strain engineering are the major routes to convert normal insulators to topological insulators. We here propose an ...

  19. Connection between asymptotic normalization coefficients, subthreshold bound states, and resonances 

    E-Print Network [OSTI]

    Mukhamedzhanov, AM; Tribble, Robert E.

    1999-01-01

    We present here useful relations showing the connection between the asymptotic normalization coefficient (ANC) and the fitting parameters in K- and R-matrix theory methods which are often used when analyzing low energy experimental data. It is shown...

  20. Near-Field Based Communication and Electrical Systems

    E-Print Network [OSTI]

    Azad, Umar

    2013-01-01

    on near-field communication system performance", IEEEcoupled near field communication system”, IEEE Internationaltransfer and inductive communication systems," Progress in

  1. Land cover change and remote sensing: Examples of quantifying spatiotemporal dynamics in tropical forests

    SciTech Connect (OSTI)

    Krummel, J.R.; Su, Haiping; Fox, J.; Yarnasan, S.; Ekasingh, M.

    1995-06-01

    Research on human impacts or natural processes that operate over broad geographic areas must explicitly address issues of scale and spatial heterogeneity. While the tropical forests of Southeast Asia and Mexico have been occupied and used to meet human needs for thousands of years, traditional forest management systems are currently being transformed by rapid and far-reaching demographic, political, economic, and environmental changes. The dynamics of population growth, migration into the remaining frontiers, and responses to national and international market forces result in a demand for land to produce food and fiber. These results illustrate some of the mechanisms that drive current land use changes, especially in the tropical forest frontiers. By linking the outcome of individual land use decisions and measures of landscape fragmentation and change, the aggregated results shows the hierarchy of temporal and spatial events that in summation result in global changes to the most complex and sensitive biome -- tropical forests. By quantifying the spatial and temporal patterns of tropical forest change, researchers can assist policy makers by showing how landscape systems in these tropical forests are controlled by physical, biological, social, and economic parameters.

  2. Tropical Ocean Climate Study (TOCS) and Japan-United States Tropical Ocean Study (JUSTOS) on the R/V KAIYO, 25 Jan to 2 March 1997, to the Tropical Western Pacific Ocean BNL component

    SciTech Connect (OSTI)

    Reynolds, R.M.; Smith, S.

    1997-04-11

    The Japanese U.S. Tropical Ocean Study (JUSTOS) cruise on the R/V KAIYO in the Tropical Western Pacific Ocean was a collaborative effort with participants from the Japanese Marine Science and Technology Center (JAMSTEC), the National Center for Atmospheric Research (NCAR), and Brookhaven National Laboratory BNL. This report is a summary of the instruments, measurements, and initial analysis of the BNL portion of the cruise only. It includes a brief description of the instrument system, calibration procedures, problems and resolutions, data collection, processing and data file descriptions. This is a working document, which is meant to provide both a good description of the work and as much information as possible in one place for future analysis.

  3. Spectral Modeling of SNe Ia Near Maximum Light: Probing the Characteristics of Hydro Models

    E-Print Network [OSTI]

    E. Baron; S. Bongard; David Branch; Peter H. Hauschildt

    2006-03-03

    We have performed detailed NLTE spectral synthesis modeling of 2 types of 1-D hydro models: the very highly parameterized deflagration model W7, and two delayed detonation models. We find that overall both models do about equally well at fitting well observed SNe Ia near to maximum light. However, the Si II 6150 feature of W7 is systematically too fast, whereas for the delayed detonation models it is also somewhat too fast, but significantly better than that of W7. We find that a parameterized mixed model does the best job of reproducing the Si II 6150 line near maximum light and we study the differences in the models that lead to better fits to normal SNe Ia. We discuss what is required of a hydro model to fit the spectra of observed SNe Ia near maximum light.

  4. School of Meteorology Comprehensive Exam Policy Below is the Comprehensive Exam Policy as approved by the School of Meteorology Faculty at the

    E-Print Network [OSTI]

    Oklahoma, University of

    , tropical meteorology, mesoscale meteorology, turbulence and computational fluid dynamics. Normally

  5. Ideal near-field thermophotovoltaic cells

    E-Print Network [OSTI]

    Molesky, Sean

    2015-01-01

    We ask the question, what are the ideal characteristics of a near-field thermophotovoltaic cell? Our search leads us to a reexamination of near-field photonic heat transfer in terms of the joint density of electronic states. This form reveals that the presence of matched van Hove singularities resulting from quantum-confinement in the emitter and converter of a thermophotovoltaic cell boosts both the magnitude and spectral selectivity of photonic heat transfer; dramatically improving energy conversion efficiency. We provide a model near-field thermophotovoltaic design making use of this idea by employing the van Hove singularities present in carbon nanotubes. Shockely Queisser analysis shows that the predicted heat transfer characteristics of this model device are fundamentally better than existing thermophotovoltaic designs. Our work paves the way for the use of quantum dots, carbon nanotubes and two-dimensional materials as future materials for thermophotovoltaic near-field energy conversion devices.

  6. THE NEAR FIELD REFRACTOR CRISTIAN E. GUTIERREZ

    E-Print Network [OSTI]

    Huang, Qingbo

    THE NEAR FIELD REFRACTOR CRISTIAN E. GUTI´ERREZ AND QINGBO HUANG Abstract. We present an abstract #12;2 C. E. GUTI´ERREZ AND QINGBO HUANG to illuminate D. This implies that one can design a lens

  7. Carbon nanotubes as near infrared laser susceptors

    E-Print Network [OSTI]

    Bahrami, Amir

    2011-01-11

    The coupling efficiency of carbon nanotubes with near infrared laser radiation at 940nm wavelength was investigated. Nanotubes treated with different post processing methods were irradiated at different laser power intensities as dry samples...

  8. Tropical Cyclone Changes in the Western North Pacific in a Global Warming Scenario MARKUS STOWASSER, YUQING WANG, AND KEVIN HAMILTON

    E-Print Network [OSTI]

    Wang, Yuqing

    Tropical Cyclone Changes in the Western North Pacific in a Global Warming Scenario MARKUS STOWASSER The influence of global warming on the climatology of tropical cyclones in the western North Pacific basin Model version 2 (CCSM2) coupled global climate model. The regional model is first tested in 10 yr

  9. Mixed-phase clouds, thin cirrus clouds, and OLR over the tropics: observations, retrievals, and radiative impacts 

    E-Print Network [OSTI]

    Lee, Joonsuk

    2009-06-02

    The tropics is a very important region in terms of earth’s radiation budget because the net radiative heating is largest in the tropics and that surplus energy is redistributed by the circulations of oceans and atmospheres. Moreover, a large number...

  10. Climate response to tropical cyclone-induced ocean mixing in an1 Earth system model of intermediate complexity2

    E-Print Network [OSTI]

    Climate response to tropical cyclone-induced ocean mixing in an1 Earth system model of intermediate system model of intermediate complexity. The parameterization is based on21 previously published global. Abstract19 We introduce a parameterization of ocean mixing by tropical cyclones (TCs) into20 an Earth

  11. Anatomy and evolution of a cyclonic mesoscale eddy observed in the northeastern Pacific tropical-subtropical transition zone

    E-Print Network [OSTI]

    Anatomy and evolution of a cyclonic mesoscale eddy observed in the northeastern Pacific tropical and evolution of a cyclonic mesoscale eddy observed in the northeastern Pacific tropical-subtropical transition zone, J. Geophys. Res. Oceans, 118, doi:10.1002/ 2013JC009339. 1. Introduction [2] Mesoscale eddy

  12. Analysis and prediction of hazard risks caused by tropical cyclones in Southern China with fuzzy mathematical and grey models

    E-Print Network [OSTI]

    Zhang, Da-Lin

    Analysis and prediction of hazard risks caused by tropical cyclones in Southern China with fuzzy 2011 Keywords: Combined weights Fuzzy mathematical models Hazard risk analysis Exceeded probability Tropical cyclones Grey prediction model a b s t r a c t A hazard-risk assessment model and a grey hazard

  13. Impact of Tropical Cyclones on the Heat Budget of the South Pacific Ocean S. JULLIEN,* C. E. MENKES,1

    E-Print Network [OSTI]

    Impact of Tropical Cyclones on the Heat Budget of the South Pacific Ocean S. JULLIEN,* C. E. MENKES cyclones (TCs) in the South Pacific convergence zone through a complete ocean heat budget. The TC impact, in final form 4 May 2012) ABSTRACT The present study investigates the integrated ocean response to tropical

  14. October 1986 R. H. Johnson 721 Lower-Tropospheric Warming and Drying in Tropical Mesoscale Convective Systems

    E-Print Network [OSTI]

    Johnson, Richard H.

    October 1986 R. H. Johnson 721 Lower-Tropospheric Warming and Drying in Tropical Mesoscale components of tropical mesoscale convective systems. It is found that while the apparent heat source Q1 of mesoscale downdrafts within the mesoscale convective systems. The warming and drying at low levels

  15. Predictability of a Mediterranean Tropical-Like Storm Downstream of the Extratropical Transition of Hurricane Helene (2006)

    E-Print Network [OSTI]

    Chaboureau, Jean-Pierre

    2006-01-01

    northeastward by an upstream trough during ET and contributed to the building of a downstream ridge. A troughPredictability of a Mediterranean Tropical-Like Storm Downstream of the Extratropical Transition downstream. The present study focuses on the predictability of a Mediterranean tropical-like storm (Medicane

  16. Hydrogeologic and climatic influences on spatial and interannual variation of recharge to a tropical karst island aquifer

    E-Print Network [OSTI]

    Banner, Jay L.

    of groundwater in tropical island aquifers, such as on Barbados, are significantly influenced by tropical of rainfall. This study shows that estimates of average annual recharge to the limestone aquifer on Barbados, island aquifers, Barbados, ENSO Citation: Jones, I. C., and J. L. Banner, Hydrogeologic and climatic

  17. Internal variability of the tropical Pacific ocean Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

    E-Print Network [OSTI]

    Jochum, Markus

    Internal variability of the tropical Pacific ocean M. Jochum Earth, Atmospheric and Planetary model of the tropical Pacific ocean is analyzed to quantify the interannual variability caused by internal variability of ocean dynamics. It is found that along the Pacific cold tongue internal variability

  18. Tropical Cyclogenesis Associated with Rossby Wave Energy Dispersion of a Preexisting Typhoon. Part I: Satellite Data Analyses*

    E-Print Network [OSTI]

    Li, Tim

    Tropical Cyclogenesis Associated with Rossby Wave Energy Dispersion of a Preexisting Typhoon. Part with the Rossby wave energy dispersion of a preexisting TC. The wave trains are oriented in a northwest induced by tropical cyclone (TC) energy dispersion are revealed based on the Quick Scatterometer (Quik

  19. High Cloud Properties from Three Years of MODIS Terra and Aqua Collection-4 Data over the Tropics

    E-Print Network [OSTI]

    Baum, Bryan A.

    High Cloud Properties from Three Years of MODIS Terra and Aqua Collection-4 Data over the Tropics) ABSTRACT This study surveys the optical and microphysical properties of high (ice) clouds over the Tropics on the gridded level-3 cloud products derived from the measurements acquired by the Moderate Resolution Imaging

  20. Method for construction of normalized cDNA libraries

    DOE Patents [OSTI]

    Soares, M.B.; Efstratiadis, A.

    1998-11-03

    This invention provides a method to normalize a directional cDNA library constructed in a vector that allows propagation in single-stranded circle form comprising: (a) propagating the directional cDNA library in single-stranded circles; (b) generating fragments complementary to the 3` noncoding sequence of the single-stranded circles in the library to produce partial duplexes; (c) purifying the partial duplexes; (d) melting and reassociating the purified partial duplexes to appropriate Cot; and (e) purifying the unassociated single-stranded circles, thereby generating a normalized cDNA library. This invention also provides normalized cDNA libraries generated by the above-described method and uses of the generated libraries. 19 figs.

  1. Method for construction of normalized cDNA libraries

    DOE Patents [OSTI]

    Soares, Marcelo B. (New York, NY); Efstratiadis, Argiris (Englewood, NJ)

    1998-01-01

    This invention provides a method to normalize a directional cDNA library constructed in a vector that allows propagation in single-stranded circle form comprising: (a) propagating the directional cDNA library in single-stranded circles; (b) generating fragments complementary to the 3' noncoding sequence of the single-stranded circles in the library to produce partial duplexes; (c) purifying the partial duplexes; (d) melting and reassociating the purified partial duplexes to appropriate Cot; and (e) purifying the unassociated single-stranded circles, thereby generating a normalized cDNA library. This invention also provides normalized cDNA libraries generated by the above-described method and uses of the generated libraries.

  2. Tropical Medicine and International Health voLUME 2 NO rr SUPPLEMENT PP Ar-A54 NOVEMBER 1997 Human behaviour and cultural context in disease control

    E-Print Network [OSTI]

    Tropical Medicine and International Health voLUME 2 NO rr SUPPLEMENT PP Ar-A54 NOVEMBER 1997 Human, Department of Tropical Medicine, Twlane School of Public Health and Tropical Medicine, N ew Orleans, USA medicine and medical anthropology researchers contributed to a successful community- based cost recovery

  3. Closeness to spheres of hypersurfaces with normal curvature bounded below

    SciTech Connect (OSTI)

    Borisenko, A A; Drach, K D

    2013-11-30

    For a Riemannian manifold M{sup n+1} and a compact domain ?? M{sup n+1} bounded by a hypersurface ?? with normal curvature bounded below, estimates are obtained in terms of the distance from O to ?? for the angle between the geodesic line joining a fixed interior point O in ? to a point on ?? and the outward normal to the surface. Estimates for the width of a spherical shell containing such a hypersurface are also presented. Bibliography: 9 titles.

  4. The normalized Laplacian spectrum of subdivisions of a graph

    E-Print Network [OSTI]

    Pinchen Xie; Zhongzhi Zhang; Francesc Comellas

    2015-10-07

    Determining and analyzing the spectra of graphs is an important and exciting research topic in theoretical computer science. The eigenvalues of the normalized Laplacian of a graph provide information on its structural properties and also on some relevant dynamical aspects, in particular those related to random walks. In this paper, we give the spectra of the normalized Laplacian of iterated subdivisions of simple connected graphs. As an example of application of these results we find the exact values of their multiplicative degree-Kirchhoff index, Kemeny's constant and number of spanning trees.

  5. Method for construction of normalized cDNA libraries

    DOE Patents [OSTI]

    Soares, M.B.; Efstratiadis, A.

    1996-01-09

    This invention provides a method to normalize a directional cDNA library constructed in a vector that allows propagation in single-stranded circle form. The method comprises: (a) propagating the directional cDNA library in single-stranded circles; (b) generating fragments complementary to the 3` noncoding sequence of the single-stranded circles in the library to produce partial duplexes; (c) purifying the partial duplexes; (d) melting and reassociating the purified partial duplexes to moderate Cot; and (e) purifying the unassociated single-stranded circles, thereby generating a normalized cDNA library. 4 figs.

  6. Method for construction of normalized cDNA libraries

    DOE Patents [OSTI]

    Soares, Marcelo B. (New York, NY); Efstratiadis, Argiris (Englewood, NJ)

    1996-01-01

    This invention provides a method to normalize a directional cDNA library constructed in a vector that allows propagation in single-stranded circle form comprising: (a) propagating the directional cDNA library in single-stranded circles; (b) generating fragments complementary to the 3' noncoding sequence of the single-stranded circles in the library to produce partial duplexes; (c) purifying the partial duplexes; (d) melting and reassociating the purified partial duplexes to moderate Cot; and (e) purifying the unassociated single-stranded circles, thereby generating a normalized cDNA library.

  7. Primary and secondary organics in tropical Amazonian rainforest aerosols: Chiral analysis of 2-methyltetrols

    SciTech Connect (OSTI)

    Gonzalez, Nelida; Borg-Karlson, Anna-Karin; Artaxo, Paulo; Guenther, Alex B.; Krejci, R.; Noziere, Barbara; Noone, Kevin

    2014-06-01

    This work presents the application of a newly developed method to facilitate the distinction between primary and secondary organic compounds in ambient aerosols based on their chiral analysis. The organic constituents chosen for chiral analysis are the four stereomers of the 2-methyltetrols, (2R,3S)- and (2S,3R)- methylerythritol and (2S,3S)- and (2R,3R)- methylthreitol. Ambient PM10 aerosol samples were collected between June 2008 and June 2009 near Manaus, Brazil, in a remote tropical rainforest environment of central Amazonia. The samples were analyzed for the presence of these four stereomers because qualitatively, in a previous study, they have been demonstrated to have partly primary origins. Thus the origin of these compounds may be primary and secondary from the biosynthesis and oxidation processes of isoprene within plants and also in the atmosphere. Using authentic standards, the quantified concentrations were in average 78.2 and 72.8 ng m-3 for (2R,3S)- and (2S,3R)- methylerythritol and 3.1 and 3.3 ng m-3 for (2S,3S)- and (2R,3R)- methylthreitol during the dry season and 7.1, 6.5, 2.0, and 2.2 ng m-3 during the wet season, respectively. Furthermore, these compounds were found to be outside the confidence interval for racemic mixtures (enantiomeric fraction, Ef = 0.5 -0.01) in nearly all the samples, with deviations of up to 32 % (Ef = 0.61) for (2R,3S)-methylerythritol and 47 % (Ef = 0.65) for (2S,3S)-methylthreitol indicating (99% confidence level) biologically-produced 2-methyltetrols. The minimum primary origin contribution ranged between 0.19 and 29.67 ng m-3 for the 2-methylerythritols and between 0.15 and 1.2 ng m-3 for the 2-methylthreitols. The strong correlation of the diatereomers (racemic 2-methylerythritol and 2-methylthreitol) in the wet season implied a secondary origin. Assuming the maximum secondary contribution in the dry season, the secondary fraction in the wet season was 81-99 % and in the dry season, 10 - 95 %. Nevertheless, from the total 2-methyltetrol mass, the secondary mass represented 31 % whereas the primary 69 %. These results could have been expected for PM10 aerosols and might be different for fine particles at the same site. In addition, correlations with isoprene emission estimates for this site only showed an anti-correlation with 2-methylthreitol suggesting their direct emission from biological activity. The present study reinforces the importance of the analysis of chiral organic compounds to correctly assess the contribution of primary biogenic emissions and isoprene oxidation products to biogenic secondary organic aerosol.

  8. Attenuation of Beaming Oscillations Near Neutron Stars

    E-Print Network [OSTI]

    M. Coleman Miller

    2000-07-17

    Observations with RXTE have revealed kilohertz quasi-periodic brightness oscillations (QPOs) from nearly twenty different neutron-star low-mass X-ray binaries (LMXBs). These frequencies often appear as a pair of kilohertz QPOs in a given power density spectrum. In many models the higher-frequency of these QPOs is a beaming oscillation at the frequency of a nearly circular orbit at some radius near the neutron star. In such models it is expected that there will also be beaming oscillations at the stellar spin frequency and at overtones of the orbital frequency, but no strong QPOs have been detected at these frequencies. We therefore examine the processes that can attenuate beaming oscillations near neutron stars, and in doing so extend the work on this subject that was initiated by the discovery of lower-frequency QPOs from LMXBs. Among our main results are (1)in a spherical scattering cloud, all overtones of rotationally modulated beaming oscillations are attenuated strongly, not just the even harmonics, and (2)it is possible to have a relatively high-amplitude modulation near the star at, e.g., the stellar spin frequency, even if no peak at that frequency is detectable in a power density spectrum taken at infinity. We discuss the application of these results to modeling of kilohertz QPOs.

  9. Convex Deep Learning via Normalized Kernels Ozlem Aslan

    E-Print Network [OSTI]

    Schuurmans, Dale

    Convex Deep Learning via Normalized Kernels ¨Ozlem Aslan Dept of Computing Science University Deep learning has been a long standing pursuit in machine learning, which until recently was hampered meth- ods while expanding the range of representable structures toward deep models. In this paper, we

  10. Computation of Normal Logic Programs by Fibring Neural Networks

    E-Print Network [OSTI]

    Seda, Anthony Karel

    Computation of Normal Logic Programs by Fibring Neural Networks Vladimir Komendantsky1 and Anthony of the integration of fibring neural net- works (a generalization of conventional neural networks) into model by fibring neural networks of semantic immediate consequence operators TP and TP , where TP denotes

  11. RADIO PROCEDURES DURING NORMAL OPERATING CONDITIONS CALLING AND COMMUNICATING TECHNIQUES

    E-Print Network [OSTI]

    Brody, James P.

    RADIO PROCEDURES DURING NORMAL OPERATING CONDITIONS CALLING AND COMMUNICATING TECHNIQUES The secret are going to say. Many people with radios have a tendency to talk and/or repeat too much. Say what you need until it is second nature. Practicing proper day-to-day radio procedures will make emergency radio

  12. PAS kinase is required for normal cellular energy balance

    E-Print Network [OSTI]

    Rutter, Jared

    PAS kinase is required for normal cellular energy balance Huai-Xiang Hao*, Caleb M. Cardon*, Wojtek in a cell-autonomous manner to maintain cellular energy homeostasis and is a potential therapeutic target). The World Health Organization estimates that the current decade will witness a 46% increase in diabetes

  13. Coarser connected topologies and non-normality points

    E-Print Network [OSTI]

    Yengulalp, Lynne Christine

    2009-01-01

    point of the Stone-Cech remainder of a space a non-normality point of the remainder? We will discuss the question in the case that X is a discrete space and then when X is a metric space without isolated points. We show that under certain set...

  14. Extremal unital completely positive normal maps and its symmetries

    E-Print Network [OSTI]

    Anilesh Mohari

    2015-07-30

    We consider the convex set of ( unital ) positive ( completely ) maps from a $C^*$ algebra $\\cla$ to a von-Neumann sub-algebra $\\clm$ of $\\clb(\\clh)$, the algebra of bounded linear operators on a Hilbert space $\\clh$ and study its extreme points via its canonical lifting to the convex set of ( unital ) positive ( complete ) normal maps from $\\hat{\\cla}$ to $\\clm$, where $\\hat{\\cla}$ is the universal enveloping von-Neumann algebra over $\\cla$. If $\\cla=\\clm$ and a ( complete ) positive operator $\\tau$ is a unique sum of a normal and a singular ( complete ) positive maps. Furthermore, a unital complete positive map is a unique convex combination of unital normal and singular complete positive maps. We used a duality argument to find a criteria for extremal elements in the convex set of unital completely positive maps having a given faithful normal invariant state. In our investigation, gauge symmetry in Stinespring representation and Kadison theorem on order isomorphism played an important role.

  15. Mixed Inductive/Coinductive Types and Strong Normalization

    E-Print Network [OSTI]

    Abel, Andreas

    and coinductive types. Most research on inductive types has focused on the iso-style, i. e., there are explicit programming language. Research partially supported by the EU coordination action TYPES (510996). #12;InMixed Inductive/Coinductive Types and Strong Normalization Andreas Abel Department of Computer

  16. Some Properties of Realcompact Subspaces and Coarser Normal Spaces

    E-Print Network [OSTI]

    Niknejad, Jila

    2009-04-23

    William Fleissner. In 1997 Buzjakova proved that for a pseudocompact space X, there exists an ordinal such that the product of X and that ordinal condenses onto a normal space if and only if X condenses onto a compact space. In the third chapter, we extend...

  17. LARGE-SCALE NORMAL COORDINATE ANALYSIS ON DISTRIBUTED

    E-Print Network [OSTI]

    Raghavan, Padma

    is presented in this paper. This method combines the implicitly restarted Lanczos algorithm with a state) plays an important role in the study of vibrational and thermal properties of various molecular by a collection of fundamental (normal) vibrational modes. These modes correspond to eigenvectors of a matrix

  18. Electromechanical imaging of the myocardium at normal and pathological states

    E-Print Network [OSTI]

    Konofagou, Elisa E.

    Electromechanical imaging of the myocardium at normal and pathological states Mathieu Pernot here a method for measuring the electromechanical coupling properties in the myocardium. Our method of the electromechanical wave is found to decrease to approximately 0.66 m/s in the ischemic region. I. INTRODUCTION

  19. Computational Model for Forced Expiration from Asymmetric Normal Lungs

    E-Print Network [OSTI]

    Lutchen, Kenneth

    Computational Model for Forced Expiration from Asymmetric Normal Lungs ADAM G. POLAK 1 losses along the airway branches. Calculations done for succeeding lung volumes result in the semidynamic to the choke points, characteristic differences of lung regional pressures and volumes, and a shape

  20. Jacobi's bound and normal forms computations. A historical survey

    E-Print Network [OSTI]

    Ollivier, François

    Jacobi's bound and normal forms computations. A historical survey F. Ollivier, LIX UMRS CNRS'evich Pankratiev. Abstract Jacobi is one of the most famous mathematicians of his century. His name is attached of Jacobi's results on ordinary differential equations and the available, published or unpublished material

  1. TESTS FOR NORMALITY BASED ON DENSITY ESTIMATORS OF CONVOLUTIONS

    E-Print Network [OSTI]

    Wefelmeyer, Wolfgang

    TESTS FOR NORMALITY BASED ON DENSITY ESTIMATORS OF CONVOLUTIONS ANTON SCHICK, YISHI WANG-type kernel density estimator, goodness-of-fit test. Anton Schick was supported by NSF Grant DMS0906551. 1 #12;2 ANTON SCHICK, YISHI WANG AND WOLFGANG WEFELMEYER Instead of comparing distribution functions, we can

  2. Microwaving of normally opaque and semi-opaque substances

    DOE Patents [OSTI]

    Sheinberg, H.; Meek, T.T.; Blake, R.D.

    1990-07-17

    Disclosed is a method of heating small particles using microwave radiation which are not normally capable of being heated by microwaves. The surfaces of the particles are coated with a material which is transparent to microwave radiation in order to cause microwave coupling to the particles and thus accomplish heating of the particles.

  3. Deep Borehole Disposal Remediation Costs for Off-Normal Outcomes

    SciTech Connect (OSTI)

    Finger, John T.; Cochran, John R.; Hardin, Ernest

    2015-08-17

    This memo describes rough-order-of-magnitude (ROM) cost estimates for a set of off-normal (accident) scenarios, as defined for two waste package emplacement method options for deep borehole disposal: drill-string and wireline. It summarizes the different scenarios and the assumptions made for each, with respect to fishing, decontamination, remediation, etc.

  4. PROPERTIES OF NEAR-SUN ASTEROIDS

    SciTech Connect (OSTI)

    Jewitt, David

    2013-05-15

    Asteroids near the Sun can attain equilibrium temperatures sufficient to induce surface modification from thermal fracture, desiccation, and decomposition of hydrated silicates. We present optical observations of nine asteroids with perihelia <0.25 AU (sub-solar temperatures {>=}800 K) taken to search for evidence of thermal modification. We find that the broadband colors of these objects are diverse but statistically indistinguishable from those of planet-crossing asteroids having perihelia near 1 AU. Furthermore, images of these bodies taken away from perihelion show no evidence for on-going mass-loss (model-dependent limits {approx}<1 kg s{sup -1}) that might result from thermal disintegration of the surface. We conclude that, while thermal modification may be an important process in the decay of near-Sun asteroids and in the production of debris, our new data provide no evidence for it.

  5. Near-perfect diffraction grating rhomb

    DOE Patents [OSTI]

    Wantuck, Paul J. (Santa Fe, NM)

    1990-01-01

    A near-perfect grating rhomb enables an output beam to be diffracted to an angle offset from the input beam. The correcting grating is tipped relative to the dispersing grating to provide the offset angle. The correcting grating is further provided with a groove spacing which differs from the dispersing grating groove space by an amount effective to substantially remove angular dispersion in the output beam. A near-perfect grating rhomb has the capability for selective placement in a FEL to suppress sideband instabilities arising from the FEL.

  6. Isodynamic axisymmetric equilibrium near the magnetic axis

    SciTech Connect (OSTI)

    Arsenin, V. V., E-mail: arsenin@nfi.kiae.ru [National Research Centre Kurchatov Institute (Russian Federation)

    2013-08-15

    Plasma equilibrium near the magnetic axis of an axisymmetric toroidal magnetic confinement system is described in orthogonal flux coordinates. For the case of a constant current density in the vicinity of the axis and magnetic surfaces with nearly circular cross sections, expressions for the poloidal and toroidal magnetic field components are obtained in these coordinates by using expansion in the reciprocal of the aspect ratio. These expressions allow one to easily derive relationships between quantities in an isodynamic equilibrium, in which the absolute value of the magnetic field is constant along the magnetic surface (Palumbo’s configuration)

  7. Mechanisms for Tropical Tropospheric Circulation Change in Response to Global Warming*

    E-Print Network [OSTI]

    Xie, Shang-Ping

    Mechanisms for Tropical Tropospheric Circulation Change in Response to Global Warming* JIAN MA change in global warming is studied by comparing the response of an atmospheric general circulation model globally in response to SST warming. A diagnostic framework is developed based on a linear baroclinic model

  8. Early Cretaceous benthic associations (foraminifera and calcareous algae) of a shallow tropical-water platform

    E-Print Network [OSTI]

    Husinec, Antun

    Early Cretaceous benthic associations (foraminifera and calcareous algae) of a shallow tropical of benthic foraminifera and calcareous algae in order to establish a precise, combined benthic biozonation species of calcareous algae, distributed among 11 genera, were recovered from the Lower Cretaceous shallow

  9. The Response of Quasigeostrophic Oceanic Vortices to Tropical Cyclone Forcing BENJAMIN JAIMES AND LYNN K. SHAY

    E-Print Network [OSTI]

    Miami, University of

    . Idealized oceanic currents and wind fields derived from observational data acquired during Hurricane Katrina of wind-driven acceleration of oceanic mixed layer (OML) currents rather than a function of the windThe Response of Quasigeostrophic Oceanic Vortices to Tropical Cyclone Forcing BENJAMIN JAIMES

  10. Momentum Flux Budget across the AirSea Interface under Uniform and Tropical Cyclone Winds

    E-Print Network [OSTI]

    Rhode Island, University of

    into ocean currents is equal to the flux from air (wind stress). However, when the surface wave field grows into currents under TCs. 1. Introduction The passage of a tropical cyclone (TC) over a warm ocean represents one is mainly due to the vertical turbulent mixing induced by the strong momentum flux into ocean currents

  11. On the interaction of Tropical Cyclone Flossie and emissions from Hawaii's Kilauea volcano

    E-Print Network [OSTI]

    Businger, Steven

    On the interaction of Tropical Cyclone Flossie and emissions from Hawaii's Kilauea volcano Andre Pattantyus1 and Steven Businger1 1 Department of Meteorology, University of Hawai`i at Mnoa, Honolulu, Hawaii et al. [2013]. Given the persistent northeast trade winds in Hawai`i, the emissions cause frequent

  12. Passive microwave observations of mesoscale convective systems over the tropical Pacific Ocean 

    E-Print Network [OSTI]

    McGaughey, Gary Rae

    1994-01-01

    the Advanced Microwave Precipitation Radiometer (AMPR) aboard the NASA ER2 during the Tropical Ocean and Global Atmosphere Coupled-Ocean Atmosphere Response Experiment (TOGA-COARE). The AMPR measures linearly polarized radiation at 10.7, 19.35, 37. 1, and 85...

  13. Wind Farms in Regions Exposed to Tropical Cyclones Niels-Erik Clausen1

    E-Print Network [OSTI]

    Wind Farms in Regions Exposed to Tropical Cyclones Niels-Erik Clausen1 , niels Energy A/S, A.C. Meyers Vænge 9, DK-2450 Copenhagen SV, Denmark, Phone +45 44 80 65 71 3 Tripod Wind 6001 Summary The present paper analyses the design basis of wind farms to be established in regions

  14. The QBO's influence on lightning production and deep convection in the tropics 

    E-Print Network [OSTI]

    Hernandez, Celina Anne

    2009-05-15

    . THE QBO?S INFLUENCE ON LIGHTING PRODUCTION IN THE TROPICS ................................................................................................................ 10 3.1 Africa... lightning flash densities observed over land (Fig.8). Therefore, this analysis focuses on four land regions: Africa, India, Maritime continent/Australia, and South America. 3.1 Africa West minus east flash density anomalies for DJF (Fig. 9a) show...

  15. Impact of tropical cyclones on the ocean heat budget in the Bay of Bengal during 1999

    E-Print Network [OSTI]

    Han, Weiqing

    ­November in 1999 on the Bay of Bengal (BoB) heat budget are examined using the Hybrid Coordinate Ocean Model estimates using previously published methods based on surface observations. The relatively weak heat pumping pumping (DOHP) by tropical cyclones (TCs), which mea- sures the amount of heat that is pumped down from

  16. The relationship between wood density and mortality in a global tropical forest data set

    E-Print Network [OSTI]

    Kraft, Nathan

    The relationship between wood density and mortality in a global tropical forest data set Nathan J-offs, long-term ecological research, phylogenetic independent contrasts, trait conservatism. Summary · Wood in mortality rates with wood density, drawing on data for 765 500 trees from 1639 species at 10 sites located

  17. Available online at www.sciencedirect.com The carbon balance of tropical forest regions, 19902005

    E-Print Network [OSTI]

    Malhi, Yadvinder

    the biosphere to the atmosphere, through the combustion and decomposition of vegetation biomass. The exact of knowledge of the carbon balance of the tropical bio- sphere, looking at both CO2 emissions from land use, principally because they contain the more substantial biomass carbon stocks, but also because so few data

  18. Low energy architecture in the tropics: from design to building construction

    E-Print Network [OSTI]

    Harry Boyer; Frédéric Miranville; François Payet

    2012-12-23

    This paper presents a realization of passive construction in Reunion, French Department in the Indian Ocean (southern hemisphere) submitted to a wet tropical climate. Aspects of passive construction were integrated at the design stage and this house does not present additional costs towards classical ones. This project was awarded a prize for architecture climate.

  19. Using Objective Analyses (H*Wind) in Tropical Cyclone Wind Vector Verification Christopher C. Hennon

    E-Print Network [OSTI]

    Hennon, Christopher C.

    of the wind field from Hurricane Katrina (2005) while in the Gulf of Mexico. Figure 4 is a plot of the dataUsing Objective Analyses (H*Wind) in Tropical Cyclone Wind Vector Verification Christopher C Florida to verify a new QuikSCAT wind retrieval algorithm ("Q-wind"). We are performing point to point

  20. Tropical Moored Buoy Implementation Panel (TIP) Report M. J. McPhaden, NOAA/PMEL

    E-Print Network [OSTI]

    Tropical Moored Buoy Implementation Panel (TIP) Report M. J. McPhaden, NOAA/PMEL Prepared of physical, chemical and biological parameters made on repeat routine buoy serving cruises. These cruises a convenient platform for buoy, drifter and weather balloon launches and other measurement activities

  1. FORECASTING OF ATLANTIC TROPICAL CYCLONES USING A KILO-MEMBER ENSEMBLE

    E-Print Network [OSTI]

    Schubert, Wayne H.

    system using an efficient multigrid barotropic vorticity equation model (MBAR). Five perturbation classes Advisor Department Head ii #12;ABSTRACT OF THESIS FORECASTING OF ATLANTIC TROPICAL CYCLONES USING A KILO forecasts. These increases have been largely driven by improved numerical weather prediction models

  2. Hybrid coupled models of the tropical Paci c | II ENSO prediction

    E-Print Network [OSTI]

    Hsieh, William

    Hybrid coupled models of the tropical Paci#12;c | II ENSO prediction by Youmin Tang 1 , William W: ytang@cims.nyu.edu #12; Abstract Two hybrid coupled models (HCMs), a dynamical ocean model coupled Introduction Models for ENSO prediction can be categorized into purely statistical models, hybrid coupled

  3. ECOLOGICAL AND ECONOMIC SUSTAINABILITY OF TROPICAL REEF SYSTEMS: ESTABLISHING SUSTAINABLE TOURISM IN THE EXUMA CAYS, BAHAMAS

    E-Print Network [OSTI]

    Sealey, Kathleen Sullivan

    ECOLOGICAL AND ECONOMIC SUSTAINABILITY OF TROPICAL REEF SYSTEMS: ESTABLISHING SUSTAINABLE TOURISM destination in the wider Carib- bean and entertains two tourism markets: 1) cruise ship and resort (overnight to that which will sustain rather than destroy the environment, the very product marketed and sought. In order

  4. Optimizing turbine withdrawal from a tropical reservoir for improved water quality in downstream wetlands

    E-Print Network [OSTI]

    Wehrli, Bernhard

    Optimizing turbine withdrawal from a tropical reservoir for improved water quality in downstream using Itezhi-Tezhi Reservoir (Zambia) as a model system aims at defining optimized turbine withdrawal. The water depth of turbine withdrawals was varied in a set of simulations to optimize outflow water quality

  5. Characterization of Throughfall Heterogeneity in a Tropical Pre-Montane Could Forest in Costa Rica 

    E-Print Network [OSTI]

    Berger, Amelie Cecile

    2013-09-26

    of this study, rain gauge networks were deployed in a 2.2-hectare watershed within a tropical pre-montane transitional cloud forest in Costa Rica. Throughfall data were collected daily for a total of 39 events from 28 June–17 July 2012 and 12 June–16 July 2013...

  6. Thesis proposal CSF Brazil 2014 Dendrimers as new drugs against neglected tropical diseases

    E-Print Network [OSTI]

    Bordenave, Charles

    Thesis proposal CSF Brazil 2014 Title: Dendrimers as new drugs against neglected tropical diseases America, particularly in Brazil. The #12;disease is severe in people with weakened immune systems, finding new medications is of high interest both for France and Brazil. We propose to use dendrimers

  7. Pelagic and coastal sources of P wave microseisms: Generation under tropical cyclones

    E-Print Network [OSTI]

    Gerstoft, Peter

    Pelagic and coastal sources of P wave microseisms: Generation under tropical cyclones Jian Zhang,1 2010; published 6 August 2010. [1] Nonlinear wave wave interactions generate double frequency (DF it is unclear whether DF surface waves generated in deep oceans are observed on land, we show that beamforming

  8. South temperate birds have higher apparent adult survival than tropical birds in Africa

    E-Print Network [OSTI]

    Martin, Thomas E.

    493 South temperate birds have higher apparent adult survival than tropical birds in Africa PennPatrick Inst., DST/NRF Centre of Excellence, Univ. of Cape Town, P/Bag X3, Rondebosch, 7701, South Africa African National Biodiversity Inst., P/Bag X7, Claremont 7735, South Africa, and School of Statistics

  9. Presentation 2.6: Wood waste for energy: lessons learnt from tropical regions Paul Vantomme

    E-Print Network [OSTI]

    the production chain MalaysiaResearch and development in energy alternative from biomass through briquetting and forest industries GhanaDevelopment of energy alternatives for the efficient utilization of woodPresentation 2.6: Wood waste for energy: lessons learnt from tropical regions Paul Vantomme

  10. Influence of compost on soil organic matter quality under tropical conditions

    E-Print Network [OSTI]

    Ma, Lena

    Influence of compost on soil organic matter quality under tropical conditions Carmen Riveroa , T was conducted in Puerto Rico to evaluate the impact of compost on soil quality and crop production in an ultisol. In particular, the effect of compost on the quality of soil organic mater (SOM) was investigated. Compost

  11. Regional climate responses to geoengineering with tropical and Arctic SO2 injections

    E-Print Network [OSTI]

    Robock, Alan

    insolation and cool Earth, has been suggested as an emergency response to geoengineer the planet in response aerosols cooling the planet, the volcano analog actually argues against geoengineering because of ozone2 into the lower stratosphere, it would produce global cooling. Tropical SO2 injection would produce

  12. ORIGINAL PAPER Soil aggregates in a tropical deciduous forest: effects on C

    E-Print Network [OSTI]

    Forney, Larry J.

    within soil micro- and macro-aggregates in a tropical deciduous forest in Me´xico. We measured, for three nutrients dynamics. Keywords Macro-aggregates Á Micro-aggregates Á Mexico Á Soil bacteria Á t, Instituto de Ecologi´a, Universidad Nacional Auto´noma de Me´xico, Me´xico, D.F., Me´xico L. J. Forney

  13. Bio-Char Soil Management on Highly Weathered Soils in the Humid Tropics

    E-Print Network [OSTI]

    Lehmann, Johannes

    36 Bio-Char Soil Management on Highly Weathered Soils in the Humid Tropics Johannes Lehmann1), ColombiaQ1 CONTENTS 36.1 Bio-Char Management and Soil Nutrient Availability ............................................. 518 36.2 Microbial Cycling of Nutrients in Soils with Bio-Char

  14. Validation of Atmospheric Infrared Sounder temperature and moisture profiles over tropical oceans and their impact

    E-Print Network [OSTI]

    Pu, Zhaoxia

    ] Tropical cyclones are one of the costliest and deadliest natural disasters in the United States and other the potential for economic damage and deaths. However, due to the lack of the conventional observations over/I satellite rainfall rates results in improvements in hurricane track forecasts in the GEOS global model [Hou

  15. Nitrogen management is essential to prevent tropical oil palm plantations from causing ground-level

    E-Print Network [OSTI]

    on the assumption that palm oil is an ``environmentally friendly'' fuel feedstock. Here we show, using measurementsNitrogen management is essential to prevent tropical oil palm plantations from causing ground the Industrial Revolution. Among the most widespread trop- ical crops is oil palm (Elaeis guineensis): global

  16. Increased sensitivity of tropical cyclogenesis to wind shear in higher SST environments

    E-Print Network [OSTI]

    Nolan, David S.

    Increased sensitivity of tropical cyclogenesis to wind shear in higher SST environments David S in environments of radiative- convective equilibrium (RCE) generated by the same model. This method is extended to allow for the incorporation of mean wind shear into the RCE states, thus providing much more realistic

  17. Wintertime observations of SubTropical Mode Water formation within the Gulf Stream

    E-Print Network [OSTI]

    Joyce, Terrence M.

    Wintertime observations of SubTropical Mode Water formation within the Gulf Stream Terrence M) within the eastward-flowing Gulf Stream as it forms during strong winter cooling. Shipboard observations that the deepest wintertime mixed layers (MLs) of EDW were found immediately south of the GS, and the distribution

  18. Tropical cyclones and permanent El Nino in the early Pliocene epoch

    E-Print Network [OSTI]

    Fedorov, Alexey V.

    Tropical cyclones (also known as hurricanes and typhoons) are now believed to be an important component of the Earth’s climate system1, 2, 3. In particular, by vigorously mixing the upper ocean, they can affect the ocean’s ...

  19. A coupled model study of the remote influence of enso on tropical Atlantic sst variability 

    E-Print Network [OSTI]

    Fang, Yue

    2006-08-16

    To investigate the tropical Atlantic response to the remote El Nino-Southern Oscillation (ENSO) forcing, a Reduced Physics Â? Coupled Global Circulation Model (RP-CGCM) is developed, and four experiments are carried out. The results show that the RP...

  20. Tropical Cyclone Energy Dispersion in a Three-Dimensional Primitive Equation Model: Upper-Tropospheric Influence*

    E-Print Network [OSTI]

    Wang, Yuqing

    The three-dimensional (3D) Rossby wave energy dispersion of a tropical cyclone (TC) is studied using of the beta effect. A synoptic-scale wave train forms in its wake a few days later. The energy energy. Because of the vertical differential inertial stability, the upper-level wave train develops

  1. Reproducibility by Climate Models of Cloud Radiative Forcing Associated with Tropical Convection

    E-Print Network [OSTI]

    Masunaga, Hirohiko

    for monthly mean data from twentieth-century simulations of 18 climate models participating in phase 3 perturbation is thus fundamental for our understanding of climate change, but shows no consistency in eitherReproducibility by Climate Models of Cloud Radiative Forcing Associated with Tropical Convection

  2. Radiative Energy Balance in the Tropical Tropopause Layer: An Investigation with ARM Data

    SciTech Connect (OSTI)

    Fu, Qiang

    2013-10-22

    The overall objective of this project is to use the ARM observational data to improve our understanding of cloud-radiation effects in the tropical tropopause layer (TTL), which is crucial for improving the simulation and prediction of climate and climate change. In last four and half years, we have been concentrating on (i) performing the comparison of the ice cloud properties from the ground-based lidar observations with those from the satellite CALIPSO lidar observations at the ARM TWP sites; (ii) analyzing TTL cirrus and its relation to the tropical planetary waves; (iii) calculating the radiative heating rates using retrieved cloud microphysical properties by combining the ground-based lidar and radar observations at the ARM TWP sites and comparing the results with those using cloud properties retrieved from CloudSat and CALIPSO observations; (iv) comparing macrophysical properties of tropical cirrus clouds from the CALIPSO satellite and from ground-based micropulse and Raman lidar observations; (v) improving the parameterization of optical properties of cirrus clouds with small effective ice particle sizes; and (vi) evaluating the enhanced maximum warming in the tropical upper troposphere simulated by the GCMs. The main results of our research efforts are reported in the 12 referred journal publications that acknowledge the DOE Grant No. DE-FG02-09ER64769.

  3. Limited sampling hampers "big data" estimation of species richness in a tropical biodiversity hotspot

    E-Print Network [OSTI]

    Schierup, Mikkel Heide

    and future of the world's biodiversity in the face of human-induced climate and land-use change has focussedLimited sampling hampers "big data" estimation of species richness in a tropical biodiversity by the National Center for Ecological Analysis and Synthesis, a center funded by the National Science Foundation

  4. Diurnal cycle of liquid water path over the subtropical and tropical oceans

    E-Print Network [OSTI]

    Hartmann, Dennis

    (Tropical Rainfall Measuring Mission Microwave Imager) satellite microwave radiometer data. Diurnal, consistent with a diurnal cycle driven largely by cloud solar absorption. In deep convective regions [1995] examined a two-point sampling of the LWP diurnal cycle of using the special sensor microwave

  5. The depth of the tropical Pacific Ocean's warm surface layer shrank during the last three

    E-Print Network [OSTI]

    Yanik, Mehmet Fatih

    The depth of the tropical Pacific Ocean's warm surface layer shrank during the last three decades Pacific Ocean, off an island in Palau. They analysed the ratio of nitrogen and carbon isotopes.1029/2010GL044867 (2010) OceanOgraphy Cold water rising in the Pacific DrUg DeVeLOpMenT Worm surgery on a chip

  6. Organisation of the soil mantle in tropical southeastern Brazil (Serra do Mar)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Organisation of the soil mantle in tropical southeastern Brazil (Serra do Mar) in relation-900 Sao Paulo ­ SP, Brazil And INRA-ENSA. Laboratoire des sciences du sol 65 rue de St Brieuc 35042 RennesORSTOM - Instituto de geociencias - DGG ­ USP C.P. 11 348 Cep: 05 422-970 Sao Paulo ­ SP, Brazil Correspondence

  7. Predicting species diversity in tropical forests Joshua B. Plotkina,b

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    of Malaysia, Kepong, Malaysia 52109; kSarawak Forestry Department, Kuching, Sarawak, Malaysia SW 93750; and l to the size of the area raised to some exponent. The exponent often turns out to be roughly 1 4. This power, individually identified trees from five tropical forests on three continents. Although the power law

  8. Effect of Convective Entrainment/Detrainment on the Simulation of the Tropical Precipitation Diurnal Cycle*

    E-Print Network [OSTI]

    Wang, Yuqing

    Effect of Convective Entrainment/Detrainment on the Simulation of the Tropical Precipitation the effect of assumed fractional convective entrainment/detrainment rates in the Tiedtke mass flux convective measurements. In a control experiment with the default fractional convective entrainment/detrainment rates

  9. Using lightweight unmanned aerial vehicles to monitor tropical forest Rakan A. Zahawi a,

    E-Print Network [OSTI]

    Ellis, Erle C.

    Using lightweight unmanned aerial vehicles to monitor tropical forest recovery Rakan A. Zahawi a from lightweight unmanned aerial vehicles (UAV) are a cost-effective substitute for tradi- tional field Rica. Ecosynth methods combine aerial images from consumer-grade digital cameras with com- puter vision

  10. Low energy architecture in the tropics: from design to building construction

    E-Print Network [OSTI]

    Boyer, Harry; Payet, François

    2012-01-01

    This paper presents a realization of passive construction in Reunion, French Department in the Indian Ocean (southern hemisphere) submitted to a wet tropical climate. Aspects of passive construction were integrated at the design stage and this house does not present additional costs towards classical ones. This project was awarded a prize for architecture climate.

  11. Monitoring groundwater storage changes in the highly1 seasonal humid tropics: validation of GRACE measurements2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Monitoring groundwater storage changes in the highly1 seasonal humid tropics: validation of GRACE the seasonality and trend in groundwater storage associated with intensive groundwater19 abstraction for dry to 2007) groundwater storage changes21 (GWS) correlate well (r=0.77 to 0.93, p-value

  12. Mesoscale eddies in the northeastern Pacific tropical-subtropical transition zone: Statistical characterization from satellite altimetry

    E-Print Network [OSTI]

    Mesoscale eddies in the northeastern Pacific tropical-subtropical transition zone: Statistical February 2012; revised 24 August 2012; accepted 6 September 2012; published 24 October 2012. [1] Mesoscale cycle. Although mesoscale eddies in these areas have been previously reported, this study provides

  13. Solid precipitation on a tropical glacier in Bolivia measured with an ultrasonic depth gauge

    E-Print Network [OSTI]

    Berthier, Etienne

    Solid precipitation on a tropical glacier in Bolivia measured with an ultrasonic depth gauge Jean effect produces precipitation at midday in the Andean valleys and in the afternoon in the high mountains the main source of melting energy. INDEX TERMS: 3354 Meteorology and Atmospheric Dynamics: Precipitation

  14. Intervention Analysis of Hurricane Effects on Snail Abundance in a Tropical Forest Using

    E-Print Network [OSTI]

    Willig, Michael

    Intervention Analysis of Hurricane Effects on Snail Abundance in a Tropical Forest Using Long disturbances, such as hurricanes, have profound effects on pop- ulations, either directly by causing mortality of resources. In the last 20 years, two major disturbances, Hurricane Hugo in 1989 and Hurricane Georges

  15. Remote sensing of soil radionuclide fluxes in a tropical ecosystem

    SciTech Connect (OSTI)

    Clegg, B.; Koranda, J.; Robinson, W.; Holladay, G.

    1980-11-06

    We are using a transponding geostationary satellite to collect surface environmental data to describe the fate of soil-borne radionuclides. The remote, former atomic testing grounds at the Eniwetok and Bikini Atolls present a difficult environment in which to collect continuous field data. Our land-based, solar-powered microprocessor and environmental data systems remotely acquire measurements of net and total solar radiation, rain, humidity, temperature, and soil-water potentials. For the past year, our water flux model predicts wet season plant transpiration rates nearly equal to the 6 to 7 mm/d evaporation pan rate, which decreases to 2 to 3 mm/d for the dry season. Radioisotopic analysis confirms the microclimate-estimated 1:3 to 1:20 soil to plant /sup 137/Cs dry matter concentration ratio. This ratio exacerbates the dose to man from intake of food plants. Nephelometer measurements of airborne particulates presently indicate a minimum respiratory radiological dose.

  16. Reduced MHD in Nearly Potential Magnetic Fields

    E-Print Network [OSTI]

    Strauss, Hank

    Reduced MHD in Nearly Potential Magnetic Fields H.R. Strauss Courant Institute of Mathematical that the magnetic field is close to a potential field. The potential field can have an arbitrary three dimensional. It is also the case in solar and stellar coronal magnetic fields, and in regions of the geomagnetic field

  17. Structure and Groundwater Flow in the Espanola Basin Near Rio...

    Office of Environmental Management (EM)

    Structure and Groundwater Flow in the Espanola Basin Near Rio Grande and Buckman Wellfield Structure and Groundwater Flow in the Espanola Basin Near Rio Grande and Buckman...

  18. EIS-0412: TX Energy, LLC, Industrial Gasification Facility Near...

    Office of Environmental Management (EM)

    2: TX Energy, LLC, Industrial Gasification Facility Near Beaumont, TX EIS-0412: TX Energy, LLC, Industrial Gasification Facility Near Beaumont, TX February 18, 2009 EIS-0412:...

  19. Obama Administration Announces Nearly $100 Million for Smart...

    Energy Savers [EERE]

    Obama Administration Announces Nearly 100 Million for Smart Grid Workforce Training and Development Obama Administration Announces Nearly 100 Million for Smart Grid Workforce...

  20. Secretary Chu Announces Nearly $15 Million for Next Generation...

    Energy Savers [EERE]

    Secretary Chu Announces Nearly 15 Million for Next Generation Energy-Efficient Lighting Secretary Chu Announces Nearly 15 Million for Next Generation Energy-Efficient Lighting...

  1. Thermal And-Or Near Infrared At Yellowstone Region (Hellman ...

    Open Energy Info (EERE)

    Thermal And-Or Near Infrared At Yellowstone Region (Hellman & Ramsey, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal And-Or Near...

  2. Obama Administration Delivers Nearly $72 Million for Energy Efficiency...

    Energy Savers [EERE]

    Nearly 72 Million for Energy Efficiency and Conservation Projects in 7 States and Territories Obama Administration Delivers Nearly 72 Million for Energy Efficiency and...

  3. Science Magazine Highlight: Moving Towards Near Zero Platinum...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Science Magazine Highlight: Moving Towards Near Zero Platinum Fuel Cells Science Magazine Highlight: Moving Towards Near Zero Platinum Fuel Cells Presentation slides and speaker...

  4. Identification and Characterization of Near-Term Direct Hydrogen...

    Energy Savers [EERE]

    Identification and Characterization of Near-Term Direct Hydrogen Proton Exchange Membrane Fuel Cell Markets Identification and Characterization of Near-Term Direct Hydrogen Proton...

  5. Department of Energy to Invest Nearly $18 Million for Advanced...

    Office of Environmental Management (EM)

    Department of Energy to Invest Nearly 18 Million for Advanced Biofuels User Facility Department of Energy to Invest Nearly 18 Million for Advanced Biofuels User Facility March...

  6. The Business of Near Zero Emissions | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    The Business of Near Zero Emissions The Business of Near Zero Emissions deer10charbonneau.pdf More Documents & Publications Advanced Vehicle Electrification Navistar-Driving...

  7. Secretary Moniz Announces Nearly $50 Million to Advance High...

    Office of Environmental Management (EM)

    Announces Nearly 50 Million to Advance High-Tech, Fuel Efficient American Autos Secretary Moniz Announces Nearly 50 Million to Advance High-Tech, Fuel Efficient American Autos...

  8. A comparison of normal and worst case cement plant emissions

    SciTech Connect (OSTI)

    Woodford, J.; Gossman, D.; Johnson, N.

    1996-12-31

    Lone Star Industries, Inc. in Cape Girardeau, Missouri conducted a trial burn in October, 1995. Two metals emissions test days were conducted. One of the test days was a worst case metals spiking day and one of the test days was a normal emissions day. This paper examines and compares the emissions from these two test days. Much has been made of metals emissions from hazardous waste burning cement kilns, but for the most part, this has been due to the worst case metals emissions data that became available from the 1992 BIF compliance testing performed and reported by 24 cement plants. By comparison, very little data exists on normal cement kiln emissions. This paper provides one comparison.

  9. High Power Tests of Normal Conducting Single-Cell Structures

    SciTech Connect (OSTI)

    Dolgashev, V.A.; Tantawi, S.G.; Nantista, C.D.; /SLAC; Higashi, Y.; Higo, T.; /KEK, Tsukuba

    2007-11-07

    We report the results of the first high power tests of single-cell traveling-wave and standing-wave structures. These tests are part of an experimental and theoretical study of rf breakdown in normal conducting structures at 11.4 GHz. The goal of this study is to determine the gradient potential of normal-conducting rf-powered particle beam accelerators. The test setup consists of reusable mode converters and short test structures and is powered by SLAC's XL-4 klystron. This setup was created for economical testing of different cell geometries, cell materials and preparation techniques with short turn-around time. The mode launchers and structures were manufactured at SLAC and KEK and tested in the SLAC Klystron Test Lab.

  10. Procedure for normalization of cDNA libraries

    DOE Patents [OSTI]

    Bonaldo, Maria DeFatima (New York, NY); Soares, Marcelo Bento (New York, NY)

    1997-01-01

    This invention provides a method to normalize a cDNA library constructed in a vector capable of being converted to single-stranded circles and capable of producing complementary nucleic acid molecules to the single-stranded circles comprising: (a) converting the cDNA library in single-stranded circles; (b) generating complementary nucleic acid molecules to the single-stranded circles; (c) hybridizing the single-stranded circles converted in step (a) with complementary nucleic acid molecules of step (b) to produce partial duplexes to an appropriate Cot; (e) separating the unhybridized single-stranded circles from the hybridized single-stranded circles, thereby generating a normalized cDNA library.

  11. Procedure for normalization of cDNA libraries

    DOE Patents [OSTI]

    Bonaldo, M.D.; Soares, M.B.

    1997-12-30

    This invention provides a method to normalize a cDNA library constructed in a vector capable of being converted to single-stranded circles and capable of producing complementary nucleic acid molecules to the single-stranded circles comprising: (a) converting the cDNA library in single-stranded circles; (b) generating complementary nucleic acid molecules to the single-stranded circles; (c) hybridizing the single-stranded circles converted in step (a) with complementary nucleic acid molecules of step (b) to produce partial duplexes to an appropriate Cot; (e) separating the unhybridized single-stranded circles from the hybridized single-stranded circles, thereby generating a normalized cDNA library. 1 fig.

  12. Surface Tension between Kaon Condensate and Normal Nuclear Matter Phase

    E-Print Network [OSTI]

    Michael B. Christiansen; Norman K. Glendenning; Jurgen Schaffner-Bielich

    2000-03-20

    We calculate for the first time the surface tension and curvature coefficient of a first order phase transition between two possible phases of cold nuclear matter, a normal nuclear matter phase in equilibrium with a kaon condensed phase, at densities a few times the saturation density. We find the surface tension is proportional to the difference in energy density between the two phases squared. Furthermore, we show the consequences for the geometrical structures of the mixed phase region in a neutron star.

  13. Qualitative properties of optimal portfolios in log-normal markets

    E-Print Network [OSTI]

    Zariphopoulou, Thaleia

    ), t (stock allocation) · Value of allocation Xt = 0 t + t dXt = t( dt + dWt) ; = 4 #12;Value function-normal markets (with S. Kallblad) · Completely monotone functions and marginal utilities (with S. Kallblad securities dSt = St dt + St dWt , S0 > 0 dBt = 0 , B0 = 1 · Self-financing strategies 0 t (bond allocation

  14. Universal spectral correlations in ensembles of random normal matrices

    E-Print Network [OSTI]

    Ravi Prakash; Akhilesh Pandey

    2014-12-20

    We consider non-gaussian ensembles of random normal matrices with the constraint that the ensembles are invariant under unitary transformations. We show that the level density of eigenvalues exhibits disk to ring transition in the complex plane. We also show that the n-eigenvalue correlation and the spacing distribution are universal and identical to that of complex (Gaussian) Ginibre ensemble. Our results are confirmed by Monte Carlo calculations. We verify the universality for dissipative quantum kicked rotor system.

  15. Carbon dioxide emitted from live stems of tropical trees is several years old.

    E-Print Network [OSTI]

    2013-01-01

    ing atmospheric testing of thermonuclear weapons during theearly 1960s, atmospheric thermonuclear weapon tests nearly

  16. Probability density functions for the variable solar wind near the solar cycle minimum

    E-Print Network [OSTI]

    Vörös,; Leitner, M; Narita, Y; Consolini, G; Kovács, P; Tóth, A; Lichtenberger, J

    2015-01-01

    Unconditional and conditional statistics is used for studying the histograms of magnetic field multi-scale fluctuations in the solar wind near the solar cycle minimum in 2008. The unconditional statistics involves the magnetic data during the whole year 2008. The conditional statistics involves the magnetic field time series splitted into concatenated subsets of data according to a threshold in dynamic pressure. The threshold separates fast stream leading edge compressional and trailing edge uncompressional fluctuations. The histograms obtained from these data sets are associated with both large-scale (B) and small-scale ({\\delta}B) magnetic fluctuations, the latter corresponding to time-delayed differences. It is shown here that, by keeping flexibility but avoiding the unnecessary redundancy in modeling, the histograms can be effectively described by a limited set of theoretical probability distribution functions (PDFs), such as the normal, log-normal, kappa and logkappa functions. In a statistical sense the...

  17. Force-free magnetosphere on near-horizon geometry of near-extreme Kerr black holes

    E-Print Network [OSTI]

    Huiquan Li; Cong Yu; Jiancheng Wang; Zhaoyi Xu

    2015-04-03

    We study force-free magnetospheres in the Blandford-Znajek process from rapidly rotating black holes by adopting the near-horizon geometry of near-extreme Kerr black holes (near-NHEK). It is shown that the Znajek regularity condition on the horizon can be directly derived from the resulting stream equation. In terms of the condition, we split the full stream equation into two separate equations. Approximate solutions around the rotation axis are derived. They are found to be consistent with previous solutions obtained in the asymptotic region. The solutions indicate energy and angular-momentum extraction from the hole.

  18. Near-field thermal electromagnetic transport

    E-Print Network [OSTI]

    Edalatpour, Sheila

    2015-01-01

    A general near-field thermal electromagnetic transport formalism that is independent of the size, shape and number of heat sources is derived. The formalism is based on fluctuational electrodynamics, where fluctuating currents due to thermal agitation are added into Maxwell's curl equations, and is thus valid for heat sources in local thermodynamic equilibrium. Using a volume integral formulation, it is shown that the proposed formalism is a generalization of the classical electromagnetic scattering framework in which thermal emission is implicitly assumed to be negligible. The near-field thermal electromagnetic transport formalism is afterwards applied to a problem involving three spheres exchanging thermal radiation, where all multipolar interactions are taken into account. Using the thermal discrete dipole approximation, it is shown that depending on the dielectric function, the presence of a third sphere slightly affects the spatial distribution of power absorbed compared to the two-sphere case. The forma...

  19. Kepler constraints on planets near hot Jupiters

    SciTech Connect (OSTI)

    Steffen, Jason H.; /Fermilab; Ragozzine, Darin; /Harvard-Smithsonian Ctr. Astrophys.; Fabrycky, Daniel C.; /UC, Santa Cruz, Astron. Astrophys.; Carter, Joshua A.; /Harvard-Smithsonian Ctr. Astrophys.; Ford, Eric B.; /Florida U.; Holman, Matthew J.; /Harvard-Smithsonian Ctr. Astrophys.; Rowe, Jason F.; /NASA, Ames; Welsh, William F.; /San Diego State U., Astron. Dept.; Borucki, William J.; /NASA, Ames; Boss, Alan P.; /Carnegie Inst., Wash., D.C., DTM; Ciardi, David R.; /Caltech /Harvard-Smithsonian Ctr. Astrophys.

    2012-05-01

    We present the results of a search for planetary companions orbiting near hot Jupiter planet candidates (Jupiter-size candidates with orbital periods near 3 d) identified in the Kepler data through its sixth quarter of science operations. Special emphasis is given to companions between the 2:1 interior and exterior mean-motion resonances. A photometric transit search excludes companions with sizes ranging from roughly two-thirds to five times the size of the Earth, depending upon the noise properties of the target star. A search for dynamically induced deviations from a constant period (transit timing variations) also shows no significant signals. In contrast, comparison studies of warm Jupiters (with slightly larger orbits) and hot Neptune-size candidates do exhibit signatures of additional companions with these same tests. These differences between hot Jupiters and other planetary systems denote a distinctly different formation or dynamical history.

  20. Near-horizon Extreme Kerr Magnetospheres

    E-Print Network [OSTI]

    Compère, G

    2015-01-01

    Analytical solutions to force-free electrodynamics around black holes are fundamental to build simple models of accretion disk and jet dynamics. We present a (non-exhaustive) classification of complex highest weight solutions to the force-free equations in the near-horizon region of the extremal Kerr black hole. Bounds on the weights of solutions are derived from the finiteness of energy and the existence of a variational principle. Two classes of real magnetically dominated solutions, respectively axisymmetric and non-axisymmetric, are described which admit finite energy with respect to the asymptotically flat observer. Subtleties related to the velocity of light surface in the near-horizon region are discussed.

  1. Dynamic trapping near a quantum critical point

    E-Print Network [OSTI]

    Michael Kolodrubetz; Emanuel Katz; Anatoli Polkovnikov

    2015-03-02

    The study of dynamics in closed quantum systems has recently been revitalized by the emergence of experimental systems that are well-isolated from their environment. In this paper, we consider the closed-system dynamics of an archetypal model: spins near a second order quantum critical point, which are traditionally described by the Kibble-Zurek mechanism. Imbuing the driving field with Newtonian dynamics, we find that the full closed system exhibits a robust new phenomenon -- dynamic critical trapping -- in which the system is self-trapped near the critical point due to efficient absorption of field kinetic energy by heating the quantum spins. We quantify limits in which this phenomenon can be observed and generalize these results by developing a Kibble-Zurek scaling theory that incorporates the dynamic field. Our findings can potentially be interesting in the context of early universe physics, where the role of the driving field is played by the inflaton or a modulus.

  2. Electrically floating, near vertical incidence, skywave antenna

    DOE Patents [OSTI]

    Anderson, Allen A.; Kaser, Timothy G.; Tremblay, Paul A.; Mays, Belva L.

    2014-07-08

    An Electrically Floating, Near Vertical Incidence, Skywave (NVIS) Antenna comprising an antenna element, a floating ground element, and a grounding element. At least part of said floating ground element is positioned between said antenna element and said grounding element. The antenna is separated from the floating ground element and the grounding element by one or more electrical insulators. The floating ground element is separated from said antenna and said grounding element by one or more electrical insulators.

  3. Adhesive rough contacts near complete contact

    E-Print Network [OSTI]

    M. Ciavarella

    2015-05-01

    Recently, there has been some debate over the effect of adhesion on the contact of rough surfaces. Classical asperity theories predict, in agreement with experimental observations, that adhesion is always destroyed by roughness except if the amplitude of the same is extremely small, and the materials are particularly soft. This happens for all fractal dimensions. However, these theories are limited due to the geometrical simplification, which may be particularly strong in conditions near full contact. We introduce therefore a simple model for adhesion, which aims at being rigorous near full contact, where we postulate there are only small isolated gaps between the two bodies. The gaps can be considered as "pressurized cracks" by using Ken Johnson's idea of searching a corrective solution to the full contact solution. The solution is an extension of the adhesive-less solution proposed recently by Xu, Jackson, and Marghitu (XJM model) (2014). This process seems to confirm recent theories using the JKR theory, namely that the effect of adhesion depends critically on the fractal dimension. For D2.5, seems for large enough magnifications that a full fractal roughness completely destroys adhesion. These results are partly paradoxical since strong adhesion is not observed in nature except in special cases. A possible way out of the paradox may be that the conclusion is relevant for the near full contact regime, where the strong role of flaws at the interfaces, and of gaps full of contaminant, trapped air or liquid in pressure, needs to be further explored. If conditions near full contact are not achieved on loading, probably the conclusions of classical asperity theories may be confirmed.

  4. Functional connectivity of coral reef fishes in a tropical seascape assessed by compound-specific stable isotope analyses

    E-Print Network [OSTI]

    McMahon, Kelton Wells

    2011-01-01

    The ecological integrity of tropical habitats, including mangroves, seagrass beds and coral reefs, is coming under increasing pressure from human activities. Many coral reef fish species are thought to use mangroves and ...

  5. Hydrologic responses of a tropical catchment in Thailand and two temperate/cold catchments in north America to global warming

    SciTech Connect (OSTI)

    Gan, T.Y.; Ahmad, Z.

    1997-12-31

    The hydrologic impact or sensitivities of three medium-sized catchments to global warming, one of tropical climate in Northern Thailand and two of temperate climate in the Sacramento and San Joaquin River basins of California, were investigated.

  6. Integrating soil macroinvertebrate diversity, litter decomposition and secondary succession in a tropical montane cloud forest in Mexico 

    E-Print Network [OSTI]

    Negrete-Yankelevich, Simoneta

    This research considers human impacts on three components of biodiversity (composition, spatial structure and function). Given the relict character and unusual biogeochemical balance of tropical montane cloud forests in ...

  7. A multi-resolution ensemble study of a tropical urban environment and its interactions with the background regional atmosphere

    E-Print Network [OSTI]

    Li, Xian-Xiang

    This study employed the Weather Research and Forecasting model with a single-layer urban canopy model to investigate the urban environment of a tropical city, Singapore. The coupled model was evaluated against available ...

  8. Ecosystem services in tropical agriculture: evaluating biodiversity and ecosystem function Understanding the relationship between biodiversity, ecosystem function, and service

    E-Print Network [OSTI]

    Todd, Brian

    1 Ecosystem services in tropical agriculture: evaluating biodiversity and ecosystem function Overview: Understanding the relationship between biodiversity, ecosystem function, and service provision a pressing concern: ecological degradation is leading to permanent reduction or loss of critical ecosystem

  9. Air-sea interaction at contrasting sites in the Eastern Tropical Pacific : mesoscale variability and atmospheric convection at 10°N

    E-Print Network [OSTI]

    Farrar, J. Thomas (John Thomas), 1976-

    2007-01-01

    The role of ocean dynamics in driving air-sea interaction is examined at two contrasting sites on 125°W in the eastern tropical Pacific Ocean using data from the Pan American Climate Study (PACS) field program. Analysis ...

  10. Patterns of water and heat flux across a biome gradient from tropical forest to savanna in Brazil

    E-Print Network [OSTI]

    2009-01-01

    Porto Velho, RO 78900-000, Brazil. P. Artaxo, L. S. Borma,tropical forest to savanna in Brazil Humberto R. da Rocha, 1RIMA Editora, Sa˜o Carlos, Brazil. Oliveira, R. , et al. (

  11. Long-term variations of North Atlantic tropical cyclone activity downscaled from a coupled model simulation of the last millennium

    E-Print Network [OSTI]

    Kozar, Michael E.

    The observed historical record of North Atlantic tropical cyclones (TCs) is relatively short and is subject to potential biases owing to a lack of observation platforms such as aircraft reconnaissance and satellite imagery ...

  12. The 1996 U.S. Purse Seine Fishery for Tropical Tunas in the Central-Western Pacific Ocean

    E-Print Network [OSTI]

    for tropical tu nas (yellowfin, Thunnus albacares; skipjack, Katsuwonus pelamis; and big eye, T. obesus, and skipjack tuna, Katsuwonus pelamis, and continued a de clining trend that started in 1995. Catch rates also

  13. Thermal Comfort Study in a Naturally Ventilated Residential Building in a Tropical Hot-Humid Climate Region 

    E-Print Network [OSTI]

    Soebarto, V. I.; Handjarinto, S.

    1998-01-01

    This paper presents a thermal comfort study in a naturally ventilated residential building located in a tropical hot-humid climate region. The specific objective of this study is to investigate whether thermal comfort in this house can be achieved...

  14. Observed Characteristics of Clouds and Precipitating Systems Associated with the Tropical Circulation in Global Models and Reanalyses 

    E-Print Network [OSTI]

    Stachnik, Justin Paul

    2013-03-25

    This dissertation presents a series of work related to the representation of the Hadley circulation (HC) in atmospheric reanalyses and general circulation models (GCMs), with connections to the underlying tropical and ...

  15. Tropical precipitation simulated by the NCAR Community Climate Model (CCM3): an evaluation based on TRMM satellite measurements 

    E-Print Network [OSTI]

    Collier, Jonathan Craig

    2005-11-01

    This study evaluates the simulation of tropical precipitation by the Community Climate Model, Version 3, developed at the National Center for Atmospheric Research. For an evaluation of the annual cycle of precipitation, ...

  16. SN~2012cg: Evidence for Interaction Between a Normal Type Ia Supernova and a Non-Degenerate Binary Companion

    E-Print Network [OSTI]

    Marion, G H; Vinkó, Jozsef; Silverman, Jeffrey M; Sand, David J; Challis, Peter; Kirshner, Robert P; Wheeler, J Craig; Berlind, Perry; Brown, Warren R; Calkins, Michael L; Dhungana, Govinda; Foley, Ryan J; Friedman, Andrew S; Graham, Melissa L; Howell, D Andrew; Hsiao, Eric Y; Irwin, Jonathan M; Kehoe, Robert; Macri, Lucas M; Mandel, Kaisey; McCully, Curtis; Rines, Kenneth J; Wilhelmy, Steven; Zheng, Weikang

    2015-01-01

    We report evidence for excess blue light from the Type Ia supernova SN~2012cg at fifteen and sixteen days before maximum B-band brightness. The emission is consistent with predictions for the impact of the supernova on a non-degenerate binary companion. This is the first evidence for emission from a companion to a normal SN~Ia. Sixteen days before maximum light, the B-V color of SN~2012cg is 0.2 mag bluer than for other normal SN~Ia. At later times, this supernova has a typical SN~Ia light curve, with extinction-corrected M_B = -19.62 \\pm 0.02 mag and Delta m_{15}(B) = 0.86 \\pm 0.02. Our data set is extensive, with photometry in 7 filters from 5 independent sources. Early spectra also show the effects of blue light, and high-velocity features are observed at early times. Near maximum, the spectra are normal with a silicon velocity v_{Si} = -10,500 km/s. Comparing the early data with models by Kasen (2010) favors a main-sequence companion of about 6 solar masses. It is possible that many other SN Ia have main-...

  17. Sources for Pu in near surface air

    SciTech Connect (OSTI)

    Hartmann, G.; Thom, C.; Baechmann, K.

    1989-01-01

    This paper provides evidence that most of the Pu in the near surface air today is due to resuspension. Vertical and particle size distribution in near surface air over a period of three years were measured. The seasonal variations of Pu in air and the influence of meteorological parameters on these variations are shown. Samples were taken before the Chernobyl accident in an area where only Pu fallout from the atmospheric nuclear tests of the early sixties occurs. The comparison of the behavior of Pu with other trace elements, which were also measured, showed similar behavior of Pu and elements like Ca, Ti and Fe in near surface air. This confirms that most Pu is resuspended because the main source for these elements in air is the soil surface. Resuspension factors and resuspension rate are estimated for all measured elements. A resuspension factor of 0.8 X 10(-8) m-1 and a resuspension rate of 0.09 X 10(-9) s-1 is calculated for Pu.

  18. Earth resistivity measurement near substation ground grids

    SciTech Connect (OSTI)

    Lodwig, S.G.; Mateja, S.A. [ComEd, Chicago, IL (United States)

    1996-11-01

    Proper substation grounding grid design requires good, accurate soil resistivity measurements. This data is essential to model the substation ground grid to design a safe ground grid with a satisfactory ground grid resistance at minimum cost. For substations with several decades of service, there is some concern that a grid may have deteriorated, been damaged during equipment installation or excavation, or that initial soil resistivity measurements were lost or may not have been correctly performed. Ground grid conductors change the substation surface voltage distribution. Any voltage measurements taken at the complete substation will also vary from the tests made without conductors present. During testing, current was injected in the soil by probes placed near the ground grid. The current tends to follow the ground grid conductors since copper is a far better conductor than the soil it is placed in. Resistance readings near grids will be lower than readings in undisturbed soil. Since computer models were unavailable for many years, analyzing the effect of the grid conductors on soil resistivity measurements was very difficult. As a result, soil resistivity measurements made close to substations were of little use to the engineer unless some means of correcting the measured values could be developed. This paper will present results of soil resistivity measurements near a substation ground grid before and after a ground grid has been installed and describes a means of calculating the undisturbed soil model.

  19. Photon sorting in the near field using subwavelength cavity arrays in the near-infrared

    SciTech Connect (OSTI)

    Mandel, Isroel M. Lansey, Eli; Gollub, Jonah N.; Sarantos, Chris H.; Akhmechet, Roman; Golovin, Andrii B.; Crouse, David T.

    2013-12-16

    A frequency selective metasurface capable of sorting photons in the near-infrared spectral range is designed, fabricated, and characterized. The metasurface, a periodic array of dielectric cylindrical cavities in a gold film, localizes and transmits light of two spectral frequency bands into spatially separated cavities, resulting in near-field light splitting. The design and fabrication methodologies of the metasurface are discussed. The transmittance and photon sorting properties of the designed structure is simulated numerically and the measured transmission is presented.

  20. Vertical profiles of radar reflectivity of convective cells in tropical and mid-latitude mesoscale convective systems 

    E-Print Network [OSTI]

    Lutz, Kurt Reed

    1992-01-01

    VERTICAL PROFILES OF RADAR REFLECTIVITY OF CONVECTIVE CELLS IN TROPICAL AND MID-LATITUDE MESOSCALE CONVECTIVE SYSTEMS A Thesis by KURT REED LUTZ Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1992 Major Subject: Meteorology VERTICAL PROFILES OF RADAR REFLECTIVITY OF CONVECTIVE CELLS IN TROPICAL AND MID-LATITUDE MESOSCALE CONVECTIVE SYSTEMS A Thesis by KURT REED LUTZ Approved...

  1. Overview Normal Observations Two-Sample Proportions Extensions on the Likelihood Ratio

    E-Print Network [OSTI]

    Watkins, Joseph C.

    Overview Normal Observations Two-Sample Proportions Topic 19 Extensions on the Likelihood Ratio Two-Sided Tests 1 / 12 #12;Overview Normal Observations Two-Sample Proportions Outline Overview Normal Observations Two-Sample Proportions Power Analysis 2 / 12 #12;Overview Normal Observations Two

  2. Final Technical Report for "Radiative Heating Associated with Tropical Convective Cloud Systems: Its Importance at Meso and Global Scales"

    SciTech Connect (OSTI)

    Schumacher, Courtney

    2012-12-13

    Heating associated with tropical cloud systems drive the global circulation. The overall research objectives of this project were to i) further quantify and understand the importance of heating in tropical convective cloud systems with innovative observational techniques, and ii) use global models to determine the large-scale circulation response to variability in tropical heating profiles, including anvil and cirrus cloud radiative forcing. The innovative observational techniques used a diversity of radar systems to create a climatology of vertical velocities associated with the full tropical convective cloud spectrum along with a dissection of the of the total heating profile of tropical cloud systems into separate components (i.e., the latent, radiative, and eddy sensible heating). These properties were used to validate storm-scale and global climate models (GCMs) and were further used to force two different types of GCMs (one with and one without interactive physics). While radiative heating was shown to account for about 20% of the total heating and did not have a strong direct response on the global circulation, the indirect response was important via its impact on convection, esp. in how radiative heating impacts the tilt of heating associated with the Madden-Julian Oscillation (MJO), a phenomenon that accounts for most tropical intraseasonal variability. This work shows strong promise in determining the sensitivity of climate models and climate processes to heating variations associated with cloud systems.

  3. Tropical Western Pacific site science mission plan. Semiannual project report, January--June 1998

    SciTech Connect (OSTI)

    Ackerman, T.; Mather, J.; Clements, W.; Barnes, F.

    1998-11-01

    The Department of Energy`s Atmospheric Radiation Measurement (ARM) program was created in 1989 as part of the US Global Change Research Program to improve the treatment of atmospheric radiative and cloud processes in computer models used to predict climate change. The overall goal of the ARM program is to develop and test parameterizations of important atmospheric processes, particularly cloud and radiative processes, for use in atmospheric models. This goal is being achieved through a combination of field measurements and modeling studies. Three primary locales were chosen for extensive field measurement facilities. These are the Southern Great Plains (SGP) of the United States, the Tropical Western Pacific (TWP), and the North Slope of Alaska and Adjacent Arctic Ocean (NSA/AAO). This Site Science Mission Plan [RPT(TWP)-010.000] describes the ARM program in the Tropical Western Pacific locale.

  4. Comparison of reduced-order, sequential and variational data assimilation methods in the tropical Pacific Ocean

    E-Print Network [OSTI]

    Robert, Céline; Verron, Jacques

    2006-01-01

    This paper presents a comparison of two reduced-order, sequential and variational data assimilation methods: the SEEK filter and the R-4D-Var. A hybridization of the two, combining the variational framework and the sequential evolution of covariance matrices, is also preliminarily investigated and assessed in the same experimental conditions. The comparison is performed using the twin-experiment approach on a model of the Tropical Pacific domain. The assimilated data are simulated temperature profiles at the locations of the TAO/TRITON array moorings. It is shown that, in a quasi-linear regime, both methods produce similarly good results. However the hybrid approach provides slightly better results and thus appears as potentially fruitful. In a more non-linear regime, when Tropical Instability Waves develop, the global nature of the variational approach helps control model dynamics better than the sequential approach of the SEEK filter. This aspect is probably enhanced by the context of the experiments in tha...

  5. Energy Spectrum of Superfluid Turbulence without Normal Fluid

    E-Print Network [OSTI]

    Tsunehiko Araki; Makoto Tsubota; Sergey K. Nemirovskii

    2002-09-03

    The energy spectrum of the superfluid turbulence without the normal fluid is studied numerically under the vortex filament model. Time evolution of the Taylor-Green vortex is calculated under the full nonlocal Biot-Savart law. It is shown that for kenergy spectrum is very similar to the Kolmogorov's -5/3 law which is the most important statistical property of the conventional turbulence, where k is the wave number of the Fourier component of the velocity field and 1 the average intervortex spacing. The vortex length distribution becomes to obey a scaling property reflecting the self-similarity of the tangle.

  6. Tropical synoptic scale moisture fields observed from the Nimbus-7 SMMR 

    E-Print Network [OSTI]

    Fink, Jeffrey David

    1989-01-01

    eastern Pacific Ocean weather systems are ea. sy to observe on visual and infrared satellite images. However, it is difficult to quantify their moisture fields due to the great scarcity of conventional data. . In addition, it is difficult to examine... rainfall over the eastern part of the tropical Pacific Ocean because there are few island stations or ship reports available. Satellite passive microwave instruments have been used to determine precip- itable water, liquid water and precipitation over...

  7. Synoptic scale sensitivity of TIROS-N moisture channels in the tropics 

    E-Print Network [OSTI]

    Blackwell, Keith Gordon

    1987-01-01

    -Chairmen of Advisory Committee: Dr. James P. McGuirk Dr. Aylmer H. Thompson Water vapor radiance data obtained from a satellite-borne radiometer were evaluated for synoptic information content and accuracy over the tropical eastern Pac'fic Ocean. An upper moist... cluster of elevated BTs was observed over the subtropical Pacific adjacent to the western flank of a series of moisture bursts. Collocated rawinsonde soundings and satellite BTs consistently showed excellent agreement within this region, indicating...

  8. An algorithm to solve any tropical linear system $A\\odot x=B\\odot x$

    E-Print Network [OSTI]

    Lorenzo, E

    2010-01-01

    An algorithm to solve any tropical linear system $A\\odot x=B\\odot x$ is presented. The given system is converted into two classical linear systems: a system of equations and a system of inequalities, each item (equation or inequality) involving exactly two variables, one with coefficient $1$, and another with coefficient $-1$. The two classical linear systems are solved, essentially, by triangulation and backward substitution.

  9. Rethinking Tropical Ocean Response to Global Warming: The Enhanced Equatorial Warming*

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    of tropical Pacific SST to increased atmospheric CO2 concentration is reexamined with a new focus in Fig. 1, which shows the SST trends in response to a 1% transient CO2 in- crease in 14 fully coupled.gov/ipcc/about_ipcc.php), and 1 as an in-house Fast Ocean­Atmosphere Model (FOAM; Jacob 1997). If we define the El Niño

  10. The Impact of Tropical Cyclones on the Geomorphic Evolution of Bolivar Peninsula, TX 

    E-Print Network [OSTI]

    Hales, Billy

    2012-07-16

    . ............................................................................ 203 1 This thesis follows the style of Journal of Coastal Research. CHAPTER I INTRODUCTION Research Purpose Tropical cyclones are agents of coastal change in the Northern Gulf of Mexico (Doran et al., 2009; Gibeaut, Gutierrez, and Hepner..., 2002; McBride, Byrnes and Hiland, 1995). Shorelines are often used to measure the geomorphic change that has been brought by these storms (Gutierrez et al., 2001; Gibeaut, Gutierrez, and Hepner, 2002; McBride, Byrnes and Hiland, 1995). Within...

  11. Long-Term Operation Of Ground-Based Atmospheric Sensing Systems In The Tropical Western Pacific

    SciTech Connect (OSTI)

    Ivey, Mark; Jones, Larry J.; Porch, W. M.; Apple, Monty L.; Widener, Kevin B.

    2004-10-14

    Three semi-autonomous atmospheric sensing systems were installed in the tropical western Pacific region. The first of these Atmospheric Radiation and Cloud Stations (ARCS) began operation in 1996. Each ARCS is configured as a system-of-systems since it comprises an ensemble of independent instrument systems. The ARCS collect, process, and transmit large volumes of cloud, solar and thermal radiation, and meteorological data to support climate studies and climate-modeling improvements as part of the U.S Department of Energy’s Atmospheric and Radiation Measurement (ARM) Program. Data from these tropical ARCS stations have been used for satellite ground-truth data comparisons and validations, including comparisons for MTI and AQUA satellite data. Our experiences with these systems in the tropics led to modifications in their design. An ongoing international logistics effort is required to keep gigabytes per day of quality-assured data flowing to the ARM program’s archives. Design criteria, performance, communications methods, and the day-to-day logistics required to support long-term operations of ground-based remote atmospheric sensing systems are discussed. End-to-end data flow from the ARCS systems to the ARM Program archives is discussed.

  12. Tropical Africa: Land Use, Biomass, and Carbon Estimates for 1980 (NDP-055)

    SciTech Connect (OSTI)

    Brown, S.

    2002-04-16

    This document describes the contents of a digital database containing maximum potential aboveground biomass, land use, and estimated biomass and carbon data for 1980. The biomass data and carbon estimates are associated with woody vegetation in Tropical Africa. These data were collected to reduce the uncertainty associated with estimating historical releases of carbon from land use change. Tropical Africa is defined here as encompassing 22.7 x 10{sup 6} km{sup 2} of the earth's land surface and is comprised of countries that are located in tropical Africa (Angola, Botswana, Burundi, Cameroon, Cape Verde, Central African Republic, Chad, Congo, Benin, Equatorial Guinea, Ethiopia, Djibouti, Gabon, Gambia, Ghana, Guinea, Ivory Coast, Kenya, Liberia, Madagascar, Malawi, Mali, Mauritania, Mozambique, Namibia, Niger, Nigeria, Guinea-Bissau, Zimbabwe (Rhodesia), Rwanda, Senegal, Sierra Leone, Somalia, Sudan, Tanzania, Togo, Uganda, Burkina Faso (Upper Volta), Zaire, and Zambia). The database was developed using the GRID module in the ARC/INFO{trademark} geographic information system. Source data were obtained from the Food and Agriculture Organization (FAO), the U.S. National Geophysical Data Center, and a limited number of biomass-carbon density case studies. These data were used to derive the maximum potential and actual (ca. 1980) aboveground biomass values at regional and country levels. The land-use data provided were derived from a vegetation map originally produced for the FAO by the International Institute of Vegetation Mapping, Toulouse, France.

  13. Impacts of different cumulus physics over south Asia region with case study tropical cyclone Viyaru

    E-Print Network [OSTI]

    Fahad, Abdullah Al

    2015-01-01

    Tropical Cyclone Viyaru, formerly known as Cyclonic Storm Mahasen was a rapidly intensifying, category 01B storm that made landfall in Chittagong, Bangladesh on the 16th of May, 2013. In this study, the sensitivity of numerical simulations of tropical cyclone to cumulus physics parametrization is carried out with a view to determine the best cumulus physics option for prediction of the cyclones track, timing, and central pressure evolution in the Bay of Bengal. For this purpose, the tropical cyclone Viyaru has been simulated by WRF ARW in a nested domain with NCEP Global Final Analysis(FNL) data as initial and boundary conditions. The model domain consists of one parent domain and one nested domain. The resolution of the parent domain is 36 km while the nested domain has a resolution of 12 km. Five numerical simulations have been done with the same micro-physics scheme (WSM3), planetary boundary layer scheme,NOAH land surface scheme but different Cumulus Parametrization scheme. Four cumulus Parametrization sc...

  14. Quasi-normal acoustic oscillations in the transonic Bondi flow

    E-Print Network [OSTI]

    Eliana Chaverra; Olivier Sarbach

    2015-09-17

    In recent work, we analyzed the dynamics of spherical and nonspherical acoustic perturbations of the Michel flow, describing the steady radial accretion of a relativistic perfect fluid into a nonrotating black hole. We showed that such perturbations undergo quasi-normal oscillations and computed the corresponding complex frequencies as a function of the black hole mass M and the radius r_c of the sonic horizon. It was found that when r_c is much larger than the Schwarzschild radius r_H = 2GM/c^2 of the black hole, these frequencies scale like the surface gravity of the analogue black hole associated with the acoustic metric. In this work, we analyze the Newtonian limit of the Michel solution and its acoustic perturbations. In this limit, the flow outside the sonic horizon reduces to the transonic Bondi flow, and the acoustic metric reduces to the one introduced by Unruh in the context of experimental black hole evaporation. We show that for the transonic Bondi flow, Unruh's acoustic metric describes an analogue black hole and compute the associated quasi-normal frequencies. We prove that they do indeed scale like the surface gravity of the acoustic black hole, thus providing an explanation for our previous results in the relativistic setting.

  15. Quasi-normal acoustic oscillations in the Michel flow

    E-Print Network [OSTI]

    Eliana Chaverra; Manuel D. Morales; Olivier Sarbach

    2015-06-09

    We study spherical and nonspherical linear acoustic perturbations of the Michel flow, which describes the steady radial accretion of a perfect fluid into a nonrotating black hole. The dynamics of such perturbations are governed by a scalar wave equation on an effective curved background geometry determined by the acoustic metric, which is constructed from the spacetime metric and the particle density and four-velocity of the fluid. For the problem under consideration in this article the acoustic metric has the same qualitative features as an asymptotically flat, static and spherically symmetric black hole, and thus it represents a natural astrophysical analogue black hole. As for the case of a scalar field propagating on a Schwarzschild background, we show that acoustic perturbations of the Michel flow exhibit quasi-normal oscillations. Based on a new numerical method for determining the solutions of the radial mode equation, we compute the associated frequencies and analyze their dependency on the radii of the event and sonic horizons and the angular momentum number. Our results for the fundamental frequencies are compared to those obtained from an independent numerical Cauchy evolution, finding good agreement between the two approaches. When the radius of the sonic horizon is large compared to the event horizon radius, we find that the quasi-normal frequencies scale approximately like the surface gravity associated with the sonic horizon.

  16. Scanning tip microwave near field microscope

    DOE Patents [OSTI]

    Xiang, Xiao-Dong (Alameda, CA); Schultz, Peter G. (Oakland, CA); Wei, Tao (Albany, CA)

    1998-01-01

    A microwave near field microscope has a novel microwave probe structure wherein the probing field of evanescent radiation is emitted from a sharpened metal tip instead of an aperture or gap. This sharpened tip, which is electrically and mechanically connected to a central electrode, extends through and beyond an aperture in an endwall of a microwave resonating device such as a microwave cavity resonator or a microwave stripline resonator. Since the field intensity at the tip increases as the tip sharpens, the total energy which is radiated from the tip and absorbed by the sample increases as the tip sharpens. The result is improved spatial resolution without sacrificing sensitivity.

  17. The endomorphism near ring on D? 

    E-Print Network [OSTI]

    Guthrie, Edgar Raymond

    1969-01-01

    The Endomorphism Rear Ring on Dg. (August 1969) Edgar R. Guthrie, B. S. , Sam Houston State; Directed by: Dr. J. J. Malone, Jr. The study of near rings is motivated by consideration of the system generated by the endomorphisms of a group. In this thesis...-tuple: The first coordinate is the image of a, the accord coordinate is the image of 2a, and so on. For examp) e, the identity mapping li is represented as (a, 2a, 3a, b, a+b, 2a+b, 3a+b) . Addition of elements in E(Dg) is done by adoition of coordi- nates...

  18. Localization length of nearly periodic layered metamaterials

    E-Print Network [OSTI]

    del Barco, O

    2015-01-01

    We have analyzed numerically the localization length of light $\\xi$ for nearly periodic arrangements of homogeneous stacks (formed exclusively by right-handed materials) and mixed stacks (with alternating right and left-handed metamaterials). Layers with index of refraction $n_1$ and thickness $L_1$ alternate with layers of index of refraction $n_2$ and thickness $L_2$. Positional disorder has been considered by shifting randomly the positions of the layer boundaries with respect to periodic values. For homogeneous stacks, we have shown that the localization length is modulated by the corresponding bands and that $\\xi$ is enhanced at the center of each allowed band. In the limit of long-wavelengths $\\lambda$, the parabolic behavior previously found in purely disordered systems is recovered, whereas for $\\lambda \\ll L_1 + L_2$ a saturation is reached. In the case of nearly periodic mixed stacks with the condition $|n_1 L_1|=|n_2 L_2|$, instead of bands there is a periodic arrangement of Lorenztian resonances, ...

  19. Perturbative String Thermodynamics near Black Hole Horizons

    E-Print Network [OSTI]

    Thomas G. Mertens; Henri Verschelde; Valentin I. Zakharov

    2015-07-01

    We provide further computations and ideas to the problem of near-Hagedorn string thermodynamics near (uncharged) black hole horizons, building upon our earlier work JHEP 1403 (2014) 086. The relevance of long strings to one-loop black hole thermodynamics is emphasized. We then provide an argument in favor of the absence of $\\alpha'$-corrections for the (quadratic) heterotic thermal scalar action in Rindler space. We also compute the large $k$ limit of the cigar orbifold partition functions (for both bosonic and type II superstrings) which allows a better comparison between the flat cones and the cigar cones. A discussion is made on the general McClain-Roth-O'Brien-Tan theorem and on the fact that different torus embeddings lead to different aspects of string thermodynamics. The black hole/string correspondence principle for the 2d black hole is discussed in terms of the thermal scalar. Finally, we present an argument to deal with arbitrary higher genus partition functions, suggesting the breakdown of string perturbation theory (in $g_s$) to compute thermodynamical quantities in black hole spacetimes.

  20. Near Field Environment Process Model Report

    SciTech Connect (OSTI)

    R.A. Wagner

    2000-11-14

    Waste emplacement and activities associated with construction of a repository system potentially will change environmental conditions within the repository system. These environmental changes principally result from heat generated by the decay of the radioactive waste, which elevates temperatures within the repository system. Elevated temperatures affect distribution of water, increase kinetic rates of geochemical processes, and cause stresses to change in magnitude and orientation from the stresses resulting from the overlying rock and from underground construction activities. The recognition of this evolving environment has been reflected in activities, studies and discussions generally associated with what has been termed the Near-Field Environment (NFE). The NFE interacts directly with waste packages and engineered barriers as well as potentially changing the fluid composition and flow conditions within the mountain. As such, the NFE defines the environment for assessing the performance of a potential Monitored Geologic Repository at Yucca Mountain, Nevada. The NFe evolves over time, and therefore is not amenable to direct characterization or measurement in the ambient system. Analysis or assessment of the NFE must rely upon projections based on tests and models that encompass the long-term processes of the evolution of this environment. This NFE Process Model Report (PMR) describes the analyses and modeling based on current understanding of the evolution of the near-field within the rock mass extending outward from the drift wall.

  1. Tropical dry-forest mammals of Palo Verde: Ecology and conservation in a changing landscape

    E-Print Network [OSTI]

    Stoner, Kathryn E.; Timm, Robert M.

    2004-02-01

    More than 114 species of mammals originally were present in Costa Rica’s tropical dry forest, and perhaps 110 species are still found there today. Bats are the most diverse group, with more than 66 species, followed by 11 species of rodents, 7 species of marsupials, 6 species in the weasel family, 5 species of cats, 3 species in the raccoon family, 3 species of primates, 3 species of artiodactyls, 2 species of canids, 2 species of xenarthrans (edentates), 1 rabbit, and 1 tapir. Costa Rica has no endemic dry forest mammals. The species that have been extirpated from this region were either highly prized game species that have been eliminated by overhunting (white-lipped peccaries) or were specialists that either feed on specific foods or have very specific habitat requirements that have been eliminated by habitat destruction. In Costa Rica 10 of the 13 mammal species recognized as endangered and 7 of the 14 found in reduced populations are found within tropical dry forest habitat. Mammals that inhabit tropical dry forest areas must be capable of dealing with high temperatures, low precipitation in the dry season, and large fluctuations in the availability of food resources during the year. Most mammals of the dry forest can be characterized as resident generalists that shift their diets in order to utilize seasonally available food resources; as resident specialists that forage on insects, seeds, or fruit and nectar; or as migrants that occupy dry forests only seasonally and move to other habitats during periods of low food availability in their foraging area in search of food sources in other areas. Bats, some of which serve as pollinators and seed dispersers, are important components of the dry forest fauna. Some species of bats change habitats within the dry forest or migrate into and out of the dry forest seasonally. Hunting has been, and continues to be, an important threat to most large mammals in dry forest habitats. As early as 1880, large numbers of deer skins were exported from Costa Rica to Europe, the majority of which came from Guanacaste. Illegal poaching is still a serious problem in the protected areas of Guanacaste. Throughout Mesoamerica, deforestation to create pastures and, in recent years, for crop cultivation has negatively affected many populations of tropical dry forest mammals. Approximately 50% of the 250,000 ha area in the lower Tempisque Basin had been deforested by 1956 and by 1970 most of the dry forest had been converted into pastureland. The spread of introduced African grasses and seasonal fires have continued to eliminate mature dry forest in northern Costa Rica in the last decades. Contamination by pesticides from agricultural fields has become a serious threat to the mammalian fauna in the region. The use of cattle as a management tool also threatens the mammalian fauna in tropical dry forest due to their affect on the natural vegetation. Cattle were reintroduced into Parque Nacional Palo Verde in the 1980s in an attempt to control the rapidly expanding cattails in the marsh, which were eliminating habitat for aquatic birds. However, cattle have been ineffective at controlling cattails, and overgrazing of tree seedlings has hindered regeneration of the forest because cattle graze selectively on seedlings of native species. The mammals of the tropical dry forest are among the most poorly known of any of the bioclimatic life zones. Conservation measures for this endangered fauna should include expanded research, training and educational programs for park personnel, economic alternatives, and sustainable development. In addition, efforts should be made for the creation of additional protected areas with buffer zones and for the development of natural regeneration programs.... contaminación por pesticidas en los campos agrícolas se ha convertido en una seria amenaza para los mamíferos de la región. El uso de ganado como herramienta de manejo también es una amenaza para la fauna de mamíferos en el bosque tropical seco debido a su...

  2. Can N 2 O stable isotopes and isotopomers be useful tools to characterize sources and microbial pathways of N 2 O production and consumption in tropical soils?

    E-Print Network [OSTI]

    2011-01-01

    in Microbial Production and Consumption of Green- housesoil denitrification: Production and consumption of nitrouspathways of N 2 O production and consumption in tropical

  3. Can N 2 O stable isotopes and isotopomers be useful tools to characterize sources and microbial pathways of N 2 O production and consumption in tropical soils?

    E-Print Network [OSTI]

    2011-01-01

    from tropical forest soils, Global Biogeochem. Cycles, 14,2 O source partitioning in soils: recent progress, remaininga temperate grassland soil after fertiliser application,

  4. Fluvial Fluxes of Water, Suspended Particulate Matter, and Nutrients and Potential Impacts on Tropical Coastal Water Biogeochemistry: Oahu, Hawai‘i

    E-Print Network [OSTI]

    Hoover, D. J.; Mackenzie, F. T.

    2009-01-01

    watersheds: Island of Oahu. Water Resources Research Center,PAPER Fluvial Fluxes of Water, Suspended Particulate Matter,Impacts on Tropical Coastal Water Biogeochemistry: Oahu,

  5. Monsoons as eddy-mediated regime transitions of the tropical overturning circulation

    E-Print Network [OSTI]

    Bordoni, Simona

    monsoons are prominent features of the summertime circulation of Earth's atmo- 1 #12;sphere, the mechanisms their largest values (Fig. 2b, f). Consistent with the Coriolis force on the meridional near-surface flow approximately balancing the drag on the zonal near- surface wind, the zonal near-surface wind in the northern

  6. A normal metal tunnel-junction heat diode

    SciTech Connect (OSTI)

    Fornieri, Antonio, E-mail: antonio.fornieri@sns.it; Martínez-Pérez, María José; Giazotto, Francesco, E-mail: giazotto@sns.it [NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, I-56127 Pisa (Italy)

    2014-05-05

    We propose a low-temperature thermal rectifier consisting of a chain of three tunnel-coupled normal metal electrodes. We show that a large heat rectification is achievable if the thermal symmetry of the structure is broken and the central island can release energy to the phonon bath. The performance of the device is theoretically analyzed and, under the appropriate conditions, temperature differences up to ?200 mK between the forward and reverse thermal bias configurations are obtained below 1?K, corresponding to a rectification ratio R?2000. The simplicity intrinsic to its design joined with the insensitivity to magnetic fields make our device potentially attractive as a fundamental building block in solid-state thermal nanocircuits and in general-purpose cryogenic electronic applications requiring energy management.

  7. Quasi-normal acoustic oscillations in the Michel flow

    E-Print Network [OSTI]

    Chaverra, Eliana; Sarbach, Olivier

    2015-01-01

    We study spherical and nonspherical linear acoustic perturbations of the Michel flow, which describes the steady radial accretion of a perfect fluid into a nonrotating black hole. The dynamics of such perturbations are governed by a scalar wave equation on an effective curved background geometry determined by the acoustic metric, which is constructed from the spacetime metric and the particle density and four-velocity of the fluid. For the problem under consideration in this article the acoustic metric has the same qualitative features as an asymptotically flat, static and spherically symmetric black hole, and thus it represents a natural astrophysical analogue black hole. As for the case of a scalar field propagating on a Schwarzschild background, we show that acoustic perturbations of the Michel flow exhibit quasi-normal oscillations. Based on a new numerical method for determining the solutions of the radial mode equation, we compute the associated frequencies and analyze their dependency on the radii of t...

  8. Normal Conducting Deflecting Cavity Development at the Cockcroft Institute

    E-Print Network [OSTI]

    Burt, G; Dexter, A C; Woolley, B; Jones, R M; Grudiev, A; Dolgashev, V; Wheelhouse, A; Mackenzie, J; McIntosh, P A; Hill, C; Goudket, P; Buckley, S; Lingwood, C

    2013-01-01

    Two normal conducting deflecting structures are currently being developed at the Cockcroft Institute, one as a crab cavity for CERN linear collider CLIC and one for bunch slice diagnostics on low energy electron beams for Electron Beam Test Facility EBTF at Daresbury. Each has its own challenges that need overcome. For CLIC the phase and amplitude tolerances are very stringent and hence beamloading effects and wakefields must be minimised. Significant work has been undertook to understand the effect of the couplers on beamloading and the effect of the couplers on the wakefields. For EBTF the difficulty is avoiding the large beam offset caused by the cavities internal deflecting voltage at the low beam energy. Prototypes for both cavities have been manufactured and results will be presented.

  9. Galaxy rotation curves with log-normal density distribution

    E-Print Network [OSTI]

    Marr, John H

    2015-01-01

    The log-normal distribution represents the probability of finding randomly distributed particles in a micro canonical ensemble with high entropy. To a first approximation, a modified form of this distribution with a truncated termination may represent an isolated galactic disk, and this disk density distribution model was therefore run to give the best fit to the observational rotation curves for 37 representative galaxies. The resultant curves closely matched the observational data for a wide range of velocity profiles and galaxy types with rising, flat or descending curves in agreement with Verheijen's classification of 'R', 'F' and 'D' type curves, and the corresponding theoretical total disk masses could be fitted to a baryonic Tully Fisher relation (bTFR). Nine of the galaxies were matched to galaxies with previously published masses, suggesting a mean excess dynamic disk mass of dex0.61+/-0.26 over the baryonic masses. Although questionable with regard to other measurements of the shape of disk galaxy g...

  10. Semi-analytic results for quasi-normal frequencies

    E-Print Network [OSTI]

    Skakala, Jozef

    2010-01-01

    The last decade has seen considerable interest in the quasi-normal frequencies [QNFs] of black holes (and even wormholes), both asymptotically flat and with cosmological horizons. There is wide agreement that the QNFs are often of the form omega_n = (offset) + i n (gap), though some authors have encountered situations where this behaviour seems to fail. To get a better understanding of the general situation we consider a semi-analytic model based on a piecewise Eckart (Poeschl--Teller) potential, allowing for different heights and different rates of exponential falloff in the two asymptotic directions. This model is sufficiently general to capture and display key features of the black hole QNFs while simultaneously being analytically tractable, at least for asymptotically large imaginary parts of the QNFs. We shall derive an appropriate "quantization condition" for the asymptotic QNFs, and extract as much analytic information as possible. In particular, we shall explicitly verify that the (offset)+ i n (gap) ...

  11. Generic master equations for quasi-normal frequencies

    E-Print Network [OSTI]

    Skakala, Jozef

    2010-01-01

    Generic master equations governing the highly-damped quasi-normal frequencies [QNFs] of one-horizon, two-horizon, and even three-horizon spacetimes can be obtained through either semi-analytic or monodromy techniques. While many technical details differ, both between the semi-analytic and monodromy approaches, and quite often among various authors seeking to apply the monodromy technique, there is nevertheless widespread agreement regarding the the general form of the QNF master equations. Within this class of generic master equations we can establish some rather general results, relating the existence of "families" of QNFs of the form omega_{a,n} = (offset)_a + i n (gap) to the question of whether or not certain ratios of parameters are rational or irrational.

  12. Mineral density volume gradients in normal and diseased human tissues

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Djomehri, Sabra I.; Candell, Susan; Case, Thomas; Browning, Alyssa; Marshall, Grayson W.; Yun, Wenbing; Lau, S. H.; Webb, Samuel; Ho, Sunita P.; Aikawa, Elena

    2015-04-09

    Clinical computed tomography provides a single mineral density (MD) value for heterogeneous calcified tissues containing early and late stage pathologic formations. The novel aspect of this study is that, it extends current quantitative methods of mapping mineral density gradients to three dimensions, discretizes early and late mineralized stages, identifies elemental distribution in discretized volumes, and correlates measured MD with respective calcium (Ca) to phosphorus (P) and Ca to zinc (Zn) elemental ratios. To accomplish this, MD variations identified using polychromatic radiation from a high resolution micro-computed tomography (micro-CT) benchtop unit were correlated with elemental mapping obtained from a microprobe X-raymore »fluorescence (XRF) using synchrotron monochromatic radiation. Digital segmentation of tomograms from normal and diseased tissues (N=5 per group; 40-60 year old males) contained significant mineral density variations (enamel: 2820-3095mg/cc, bone: 570-1415mg/cc, cementum: 1240-1340mg/cc, dentin: 1480-1590mg/cc, cementum affected by periodontitis: 1100-1220mg/cc, hypomineralized carious dentin: 345-1450mg/cc, hypermineralized carious dentin: 1815-2740mg/cc, and dental calculus: 1290-1770mg/cc). A plausible linear correlation between segmented MD volumes and elemental ratios within these volumes was established, and Ca/P ratios for dentin (1.49), hypomineralized dentin (0.32-0.46), cementum (1.51), and bone (1.68) were observed. Furthermore, varying Ca/Zn ratios were distinguished in adapted compared to normal tissues, such as in bone (855-2765) and in cementum (595-990), highlighting Zn as an influential element in prompting observed adaptive properties. Hence, results provide insights on mineral density gradients with elemental concentrations and elemental footprints that in turn could aid in elucidating mechanistic processes for pathologic formations.« less

  13. Crossover from anomalous to normal diffusion in porous media

    E-Print Network [OSTI]

    F. D. A. Aarao Reis; Dung di Caprio

    2015-06-16

    Random walks (RW) of particles adsorbed in the internal walls of porous deposits produced by ballistic-type growth models are studied. The particles start at the external surface of the deposits and enter their pores, in order to simulate an external flux of a species towards a porous solid. For short times, the walker concentration decays as a stretched exponential of the depth z, but a crossover to long time normal diffusion is observed in most samples. The anomalous concentration profile remains at long times in very porous solids if the walker steps are restricted to nearest neighbors and is accompanied with subdiffusion features. These findings are correlated with a decay of the explored area with z. The study of RW of tracer particles left at the internal part of the solid rules out an interpretation by diffusion equations with position-dependent coefficients. A model of RW in a tube of decreasing cross section explains those results by showing long crossovers from an effective subdiffusion regime to an asymptotic normal diffusion. The crossover position and density are analytically calculated for a tube with area decreasing exponentially with z and show good agreement with numerical data. The anomalous decay of the concentration profile is interpreted as a templating effect of the tube shape on the total number of diffusing particles at each depth, while the volumetric concentration in the actually explored porous region may not have significant decay. These results may explain the anomalous diffusion of metal atoms in porous deposits observed in recent works. They also confirm the difficulty in interpreting experimental or computational data on anomalous transport reported in recent works, particularly if only the concentration profiles are measured.

  14. Insolation data manual and direct normal solar radiation data manual

    SciTech Connect (OSTI)

    none,

    1990-07-01

    The Insolation Data Manual presents monthly averaged data which describes the availability of solar radiation at 248 National Weather Service (NWS) stations, principally in the United States. Monthly and annual average daily insolation and temperature values have been computed from a base of 24--25 years of data, generally from 1952--1975, and listed for each location. Insolation values represent monthly average daily totals of global radiation on a horizontal surface and are depicted using the three units of measurement: kJ/m{sup 2} per day, Btu/ft{sup 2} per day and langleys per day. Average daily maximum, minimum and monthly temperatures are provided for most locations in both Celsius and Fahrenheit. Heating and cooling degree-days were computed relative to a base of 18.3 C (65 F). For each station, global {bar K}{sub T} (cloudiness index) values were calculated on a monthly and annual basis. Global {bar K}{sub T} is an index of cloudiness and indicates fractional transmittance of horizontal radiation, from the top of the atmosphere to the earth's surface. The second section of this volume presents long-term monthly and annual averages of direct normal solar radiation for 235 NWS stations, including a discussion of the basic derivation process. This effort is in response to a generally recognized need for reliable direct normal data and the recent availability of 23 years of hourly averages for 235 stations. The relative inaccessibility of these data on microfiche further justifies reproducing at least the long-term averages in a useful format. In addition to a definition of terms and an overview of the ADIPA model, a discussion of model validation results is presented.

  15. Ocean General Circula-on near 1000 m depth

    E-Print Network [OSTI]

    Lherminier, Pascale

    currents near 1000 m depth · Eddy Kine-c Energy near 1000 m depth · Seasonal hemisphere), Kuroshio, Oyashio, East Kamchatka, Alaska Stream, Gulf Stream, Labrador, East and West Greenland (northern hemisphere). · Alternate zonal bands

  16. BUILDING CONNECTION ACCESS VIA ENTRANCE NEAR ROUNDABOUT AND ENTRANCE FACING

    E-Print Network [OSTI]

    Shoubridge, Eric

    1ST FLOOR ENTRANCE ELEVATOR WASHROOMS BUILDING CONNECTION ACCESS VIA ENTRANCE NEAR ROUNDABOUT AND 7TH FLOOR CONNECT WITH MCINTYRE MEDICAL BUILDING LIFE SCIENCES COMPLEX 3649 PROMENADE SIR WASHROOM #12;ENTRANCE ELEVATOR WASHROOMS BUILDING CONNECTION ACCESS VIA ENTRANCE NEAR ROUNDABOUT

  17. Photovoltaic (PV) Pricing Trends: Historical, Recent, and Near-Term

    E-Print Network [OSTI]

    Photovoltaic (PV) Pricing Trends: Historical, Recent, and Near-Term Projections November 2012 #12;Photovoltaic (PV) Pricing Trends: Historical, Recent, and Near-Term Projections David Feldman1 , Galen Barbose2........................................................................................................................................... 1 2. Historical and Recent Reported Prices

  18. KRONECKER COEFFICIENTS FOR SOME NEAR-RECTANGULAR VASU V. TEWARI

    E-Print Network [OSTI]

    Fournier, John J.F.

    KRONECKER COEFFICIENTS FOR SOME NEAR-RECTANGULAR PARTITIONS VASU V. TEWARI Abstract. We give function, Young tableau, near-rectangle, bounded height. 1 #12;2 VASU V. TEWARI computing them

  19. Nucleon Resonances Near 2 GeV

    E-Print Network [OSTI]

    He, Jun

    2015-01-01

    The nucleon resonances near 2 GeV are investigated through the $\\Sigma$(1385) and $\\Lambda(1520)$ photoproductions within a Regge-plus-resonance approach based on the new experimental data released by the CLAS Collaboration. The $\\Delta(2000)$ and the $N(2120)$ are found essential to reproduce the experimental data and should be assigned as second $[\\Delta 5/2^+]$ and third $[N3/2^-]$ in the constituent quark model, respectively. A calculation of the binding energy and decay pattern supports that the $N(1875)$, which is listed in the PDG as the third $N3/2^-$ nucleon resonance instead of the $N(2120)$, is from the $\\Sigma(1385)K$ interaction rather than a three quark state.

  20. Capturing near-Earth asteroids around Earth Zaki Hasnain n

    E-Print Network [OSTI]

    Ross, Shane

    Capturing near-Earth asteroids around Earth Zaki Hasnain n , Christopher A. Lamb, Shane D. Ross Keywords: Near-Earth asteroids Asteroid capture a b s t r a c t The list of detected near-Earth asteroids metals and semiconducting elements on Earth may be supplemented or even replaced by the reserves floating

  1. The History of Near-field Optics1 Lukas Novotny

    E-Print Network [OSTI]

    Novotny, Lukas

    The History of Near-field Optics1 Lukas Novotny The Institute of Optics, University of Rochester of near-field optics. The roots trace back to the letters exchanged between Edward Hutchinson Synge of scanning probe microscopy and by the first optical near-field measurements by Dieter W. Pohl and co

  2. Factor Analysis for Skewed Data and Skew-Normal Maximum Likelihood Factor Analysis 

    E-Print Network [OSTI]

    Gaucher, Beverly Jane

    2013-04-04

    This research explores factor analysis applied to data from skewed distributions for the general skew model, the selection-elliptical model, the selection-normal model, the skew-elliptical model and the skew-normal model ...

  3. Normal form approach for dispersive equations with low-regularity data

    E-Print Network [OSTI]

    Oh, Seungly

    2012-01-01

    In this dissertation, we examine applications of the normal form technique to nonlinear dispersive equations with rough initial data. Working within the framework of Bourgain spaces, the normal form method often produces ...

  4. Sensitivity of global tropical climate to land surface processes: Mean state and interannual variability

    SciTech Connect (OSTI)

    Ma, Hsi-Yen; Xiao, Heng; Mechoso, C. R.; Xue, Yongkang

    2013-03-01

    This study examines the sensitivity of global tropical climate to land surface processes (LSP) using an atmospheric general circulation model both uncoupled (with prescribed SSTs) and coupled to an oceanic general circulation model. The emphasis is on the interactive soil moisture and vegetation biophysical processes, which have first order influence on the surface energy and water budgets. The sensitivity to those processes is represented by the differences between model simulations, in which two land surface schemes are considered: 1) a simple land scheme that specifies surface albedo and soil moisture availability, and 2) the Simplified Simple Biosphere Model (SSiB), which allows for consideration of interactive soil moisture and vegetation biophysical process. Observational datasets are also employed to assess the reality of model-revealed sensitivity. The mean state sensitivity to different LSP is stronger in the coupled mode, especially in the tropical Pacific. Furthermore, seasonal cycle of SSTs in the equatorial Pacific, as well as ENSO frequency, amplitude, and locking to the seasonal cycle of SSTs are significantly modified and more realistic with SSiB. This outstanding sensitivity of the atmosphere-ocean system develops through changes in the intensity of equatorial Pacific trades modified by convection over land. Our results further demonstrate that the direct impact of land-atmosphere interactions on the tropical climate is modified by feedbacks associated with perturbed oceanic conditions ("indirect effect" of LSP). The magnitude of such indirect effect is strong enough to suggest that comprehensive studies on the importance of LSP on the global climate have to be made in a system that allows for atmosphere-ocean interactions.

  5. The Relation Between Dry Vortex Merger and Tropical Cyclone Genesis over the Atlantic Ocean

    SciTech Connect (OSTI)

    Chen, Shu-Hua; Liu, Yi-Chin

    2014-10-27

    A strong, convective African tropical disturbance has a greater chance to develop into a Tropical 23 Depression (TD) if it merges with a shallow, dry vortex (D-vortex) from the north of the African 24 easterly jet (AEJ) after leaving the western coast. Using 11-year reanalysis data we found that the 25 western tip of a vortex strip at northwestern Africa can serve as dry vortices for the D-vortex 26 merger if it shifts southward. Another source of D-vortices is the westward propagating lows 27 along the southern edge of the Saharan air. The D-vortex merger process occurred for 63.5% of 28 tropical cyclones (TCs) or developing systems over the main development region of the Atlantic 29 Ocean, while it occurred for 54% of non-developing systems. TC genesis could be largely 30 controlled by the large-scale environment, but the differences in characteristics of vortices 31 associated with the D-vortex merger between developing and non-developing systems could 32 potentially help determine their destinies; in general, developing systems were dominated by a 33 more intense and moist south vortex, while non-developing systems were dominated by a north 34 vortex which was more intense, drier, and larger in size. Analysis also shows that 74% of intense 35 developing systems were involved with the D-vortex merger process. More attention needs to be 36 paid to the D-vortex merger and the characteristics of those vortices as they can play significant 37 roles or have a strong indication in Atlantic TC genesis.

  6. TRENDS IN DIRECT NORMAL SOLAR IRRADIANCE IN OREGON FROM 1979-2003 Laura Riihimaki

    E-Print Network [OSTI]

    Oregon, University of

    TRENDS IN DIRECT NORMAL SOLAR IRRADIANCE IN OREGON FROM 1979-2003 Laura Riihimaki Frank Vignola of trends in direct normal irradiance from three sites around Oregon over a period of 25 years. An overall. This article studies the trends in direct normal beam irradiance at three locations in Oregon. These sites have

  7. Modeling and Generating Daily Changes in Market Variables Using A Multivariate Mixture of Normal Distributions

    E-Print Network [OSTI]

    Wang, Jin

    Modeling and Generating Daily Changes in Market Variables Using A Multivariate Mixture of Normal of the normal distribution for modeling of daily changes in market variables with fatter-than-normal tails is to transform (linearly) a multivariate normalwith an input covariance matrix into the desired multivariate

  8. Sampling Plan for Assaying Plates Containing Depleted or Normal Uranium

    SciTech Connect (OSTI)

    Ivan R. Thomas

    2011-11-01

    This paper describes the rationale behind the proposed method for selecting a 'representative' sample of uranium metal plates, portions of which will be destructively assayed at the Y-12 Security Complex. The total inventory of plates is segregated into two populations, one for Material Type 10 (depleted uranium (DU)) and one for Material Type 81 (normal [or natural] uranium (NU)). The plates within each population are further stratified by common dimensions. A spreadsheet gives the collective mass of uranium element (and isotope for DU) and the piece count of all plates within each stratum. These data are summarized in Table 1. All plates are 100% uranium metal, and all but approximately 60% of the NU plates have Kel-F{reg_sign} coating. The book inventory gives an overall U-235 isotopic percentage of 0.22% for the DU plates, ranging from 0.19% to 0.22%. The U-235 ratio of the NU plates is assumed to be 0.71%. As shown in Table 1, the vast majority of the plates are comprised of depleted uranium, so most of the plates will be sampled from the DU population.

  9. FACT SHEET U.S. Department of Energy Tropical Western Pacific

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFES OctoberEvan Racah Evan-5InformationValues shown forTropical

  10. SU-E-T-568: Improving Normal Brain Sparing with Increasing Number of Arc Beams for Volume Modulated Arc Beam Radiosurgery of Multiple Brain Metastases

    SciTech Connect (OSTI)

    Hossain, S; Hildebrand, K; Ahmad, S; Larson, D; Ma, L; Sahgal, A

    2014-06-01

    Purpose: Intensity modulated arc beams have been newly reported for treating multiple brain metastases. The purpose of this study was to determine the variations in the normal brain doses with increasing number of arc beams for multiple brain metastases treatments via the TrueBeam Rapidarc system (Varian Oncology, Palo Alto, CA). Methods: A patient case with 12 metastatic brain lesions previously treated on the Leksell Gamma Knife Perfexion (GK) was used for the study. All lesions and organs at risk were contoured by a senior radiation oncologist and treatment plans for a subset of 3, 6, 9 and all 12 targets were developed for the TrueBeam Rapidarc system via 3 to 7 intensity modulated arc-beams with each target covered by at least 99% of the prescribed dose of 20 Gy. The peripheral normal brain isodose volumes as well as the total beam-on time were analyzed with increasing number of arc beams for these targets. Results: All intensisty modulated arc-beam plans produced efficient treatment delivery with the beam-on time averaging 0.6–1.5 min per lesion at an output of 1200 MU/min. With increasing number of arc beams, the peripheral normal brain isodose volumes such as the 12-Gy isodose line enclosed normal brain tissue volumes were on average decreased by 6%, 11%, 18%, and 28% for the 3-, 6-, 9-, 12-target treatment plans respectively. The lowest normal brain isodose volumes were consistently found for the 7-arc treatment plans for all the cases. Conclusion: With nearly identical beam-on times, the peripheral normal brain dose was notably decreased when the total number of intensity modulated arc beams was increased when treating multiple brain metastases. Dr Sahgal and Dr Ma are currently serving on the board of international society of stereotactic radiosurgery.

  11. Large fluxes and rapid turnover of mineral-associated carbon across topographic gradients in a humid tropical forest: insights from paired 14C analysis

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Hall, S. J.; McNicol, G.; Natake, T.; Silver, W. L.

    2015-04-29

    It has been proposed that the large soil carbon (C) stocks of humid tropical forests result predominantly from C stabilization by reactive minerals, whereas oxygen (O2) limitation of decomposition has received much less attention. We examined the importance of these factors in explaining patterns of C stocks and turnover in the Luquillo Experimental Forest, Puerto Rico, using radiocarbon (14C) measurements of contemporary and archived samples. Samples from ridge, slope, and valley positions spanned three soil orders (Ultisol, Oxisol, Inceptisol) representative of humid tropical forests, and differed in texture, reactive metal content, O2 availability, and root biomass. Mineral-associated C comprised themore »large majority (87 ± 2%, n = 30) of total soil C. Turnover of most mineral-associated C (66 ± 2%) was rapid (11 to 26 years; mean and SE: 18 ± 3 years) in 25 of 30 soil samples across surface horizons (0–10 and 10–20 cm depths) and all topographic positions, independent of variation in reactive metal concentrations and clay content. Passive C with centennial–millennial turnover was typically much less abundant (34 ± 3%), even at 10–20 cm depths. Carbon turnover times and concentrations significantly increased with concentrations of reduced iron (Fe(II)) across all samples, suggesting that O2 availability may have limited the decomposition of mineral-associated C over decadal scales. Steady-state inputs of mineral-associated C were statistically similar among the three topographic positions, and could represent 10–25% of annual litter production. Observed trends in mineral-associated ?14C over time could not be fit using the single-pool model used in many other studies, which generated contradictory relationships between turnover and ?14C as compared with a more realistic two-pool model. The large C fluxes in surface and near-surface soils documented here are supported by findings from paired 14C studies in other types of ecosystems, and suggest that most mineral-associated C cycles relatively rapidly (decadal scales) across ecosystems that span a broad range of state factors.« less

  12. Large fluxes and rapid turnover of mineral-associated carbon across topographic gradients in a humid tropical forest: insights from paired 14C analysis

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Hall, S. J.; McNicol, G.; Natake, T.; Silver, W. L.

    2015-01-16

    It has been proposed that the large soil carbon (C) stocks of humid tropical forests result predominantly from C stabilization by reactive minerals, whereas oxygen (O2) limitation of decomposition has received much less attention. We examined the importance of these factors in explaining patterns of C stocks and turnover in the Luquillo Experimental Forest, Puerto Rico, using radiocarbon (14C) measurements of contemporary and archived samples. Samples from ridge, slope, and valley positions spanned three soil orders (Ultisol, Oxisol, Inceptisol) representative of humid tropical forests, and differed in texture, reactive metal content, O2 availability, and root biomass. Mineral-associated C comprised themore »large majority (87 ± 2%, n = 30) of total soil C. Turnover of most mineral-associated C (74 ± 4%) was rapid (9 to 29 years, mean and SE 20 ± 2 years) in 25 of 30 soil samples across surface horizons (0–10 and 10–20 cm depths) and all topographic positions, independent of variation in reactive metal concentrations and clay content. Passive C with centennial – millennial turnover was much less abundant (26%), even at 10–20 cm depths. Carbon turnover times and concentrations significantly increased with concentrations of reduced iron (Fe(II)) across all samples, suggesting that O2 availability may have limited the decomposition of mineral associated C over decadal scales. Steady-state inputs of mineral-associated C were similar among the three topographic positions, and could represent 10–30% of annual litterfall production (estimated by doubling aboveground litterfall). Observed trends in mineral-associated ?14C over time could not be fit using the single pool model used in many other studies, which generated contradictory relationships between turnover and ?14C as compared with a more realistic constrained two-pool model. The large C fluxes in surface and near-surface soils implied by our data suggest that other studies using single-pool ?14C models of mineral-associated C dynamics, unconstrained by multiple time points, may have systematically underestimated C turnover.« less

  13. Singapore Journal of Tropical Geography 27 (2006) 13 2006 Department of Geography, National University of Singapore and Blackwell Publishing Asia Pty Ltd

    E-Print Network [OSTI]

    Roy Chowdhury, Rinku

    2006-01-01

    Singapore Journal of Tropical Geography 27 (2006) 1­3 © 2006 Department of Geography, National of Geography and Regional Studies, University of Miami, Miami, Florida, USA Correspondence: Douglas O. Fuller (email:dofuller@miami.edu) This Special Issue of the Singapore Journal of Tropical Geography derives from

  14. P h y s i c a l O c e a n o g r a p h y D i v i s i o n The Tropical Atlantic Sea Surface Temperature Bias in Coupled

    E-Print Network [OSTI]

    using the NCAR community earth system model version 1 (CESM1). The tropical Atlantic SST bias (simulated

  15. P h y s i c a l O c e a n o g r a p h y D i v i s i o n The Tropical Atlantic Sea Surface Temperature Bias in Coupled

    E-Print Network [OSTI]

    numerical model experiments using the NCAR community earth system model version 1 (CESM1). The tropic al

  16. Field Exploration of Methane Seep Near Atqasuk

    SciTech Connect (OSTI)

    Katey Walter, Dennis Witmer, Gwen Holdmann

    2008-12-31

    Methane (CH{sub 4}) in natural gas is a major energy source in the U.S., and is used extensively on Alaska's North Slope, including the oilfields in Prudhoe Bay, the community of Barrow, and the National Petroleum Reserve, Alaska (NPRA). Smaller villages, however, are dependent on imported diesel fuel for both power and heating, resulting in some of the highest energy costs in the U.S. and crippling local economies. Numerous CH{sub 4} gas seeps have been observed on wetlands near Atqasuk, Alaska (in the NPRA), and initial measurements have indicated flow rates of 3,000-5,000 ft{sup 3} day{sup -1} (60-100 kg CH{sub 4} day{sup -1}). Gas samples collected in 1996 indicated biogenic origin, although more recent sampling indicated a mixture of biogenic and thermogenic gas. In this study, we (1) quantified the amount of CH{sub 4} generated by several seeps and evaluated their potential use as an unconventional gas source for the village of Atqasuk; (2) collected gas and analyzed its composition from multiple seeps several miles apart to see if the source is the same, or if gas is being generated locally from isolated biogenic sources; and (3) assessed the potential magnitude of natural CH{sub 4} gas seeps for future use in climate change modeling.

  17. Vibrationally excited molecular hydrogen near Herschel 36

    SciTech Connect (OSTI)

    Rachford, Brian L. [Department of Physics, Embry-Riddle Aeronautical University, 3700 Willow Creek Road, Prescott, AZ 86301-3720 (United States); Snow, Theodore P. [Center for Astrophysics and Space Astronomy, Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309-0389 (United States); Ross, Teresa L., E-mail: rachf7ac@erau.edu [Department of Astronomy, New Mexico State University, Las Cruces, NM 88003-8001 (United States)

    2014-05-10

    We present the first high resolution UV spectra toward Herschel 36, a Trapezium-like system of high-mass stars contained within the Lagoon Nebula (M8, NGC 6523). The spectra reveal extreme rovibrational excitation of molecular hydrogen in material at a single velocity or very small range of velocities, with this component presumably lying near the star system and undergoing fluorescent excitation. The overall H{sub 2} excitation is similar to, but apparently larger than, that seen toward HD 37903 which previously showed the largest vibrationally excited H{sub 2} column densities seen in UV absorption spectra. While the velocities of the highly excited H{sub 2} lines are consistent within each observation, it appears that they underwent a ?60 km s{sup –1} redshift during the 3.6 yr between observations. In neither case does the velocity of the highly excited material match the velocity of the bulk of the line-of-sight material which appears to mostly be in the foreground of M8. Recent work shows unusually excited CH and CH{sup +} lines and several unusually broad diffuse interstellar bands toward Herschel 36. Along with the H{sub 2} excitation, all of these findings appear to be related to the extreme environment within ?0.1 pc of the massive young stellar system.

  18. Optimizing near real time accountability for reprocessing.

    SciTech Connect (OSTI)

    Cipiti, Benjamin B.

    2010-06-01

    Near Real Time Accountability (NRTA) of actinides at high precision in reprocessing plants has been a long sought-after goal in the safeguards community. Achieving this goal is hampered by the difficulty of making precision measurements in the reprocessing environment, equipment cost, and impact to plant operations. Thus the design of future reprocessing plants requires an optimization of different approaches. The Separations and Safeguards Performance Model, developed at Sandia National Laboratories, was used to evaluate a number of NRTA strategies in a UREX+ reprocessing plant. Strategies examined include the incorporation of additional actinide measurements of internal plant vessels, more use of process monitoring data, and the option of periodic draining of inventory to key tanks. Preliminary results show that the addition of measurement technologies can increase the overall measurement uncertainty due to additional error propagation, so care must be taken when designing an advanced system. Initial results also show that relying on a combination of different NRTA techniques will likely be the best option. The model provides a platform for integrating all the data. The modeling results for the different NRTA options under various material loss conditions will be presented.

  19. A nearly pure monoclinic nanocrystalline zirconia

    SciTech Connect (OSTI)

    Guo Gongyi . E-mail: guo_gongyi@hotmail.com; Chen Yuli

    2005-05-15

    Generally, monoclinic zirconia is considered to be much more difficult to prepare at low temperatures and particularly in a pure state. The present work is the first example that shows that the hydrous zirconia formed by precipitation can yield a nearly pure nanocrystalline monoclinic zirconia at a temperature as low as 320 deg. C. The crystallite size of the monoclinic zirconia produced in the present work is around 15nm, and it does not change appreciably as calcination temperature is increased from 320 to or above 400 deg. C. Such a small monoclinic crystallite arises from some of the chemical and physical factors built into the solution-gelation-xerogel process such as acidic preparation-pH, rapid precipitation, and moderate aging time and drying temperature, which result in a structure different from those of the existing zirconium hydroxides. In addition, the hydrous zirconia exhibits a unique thermal behavior in two respects: first, a sudden weight drop in the region of exothermic peak of the thermogravimetric curve is seen, suggesting that the main decomposition of the hydrous zirconia occurs in this region; second, there is an endothermic peak at high temperature in the differential thermal analysis curve, indicating the presence of coordinated water in the hydrous zirconia.

  20. CANDELS/GOODS-S, CDFS, and ECDFS: photometric redshifts for normal and X-ray-detected galaxies

    SciTech Connect (OSTI)

    Hsu, Li-Ting; Salvato, Mara; Nandra, Kirpal; Brusa, Marcella; Bender, Ralf; Buchner, Johannes; Brightman, Murray; Georgakakis, Antonis; Donley, Jennifer L.; Kocevski, Dale D.; Guo, Yicheng; Barro, Guillermo; Faber, Sandra M.; Rangel, Cyprian; Willner, S. P.; Ashby, Matthew L. N.; Budavári, Tamás; Szalay, Alexander S.; Dahlen, Tomas; and others

    2014-11-20

    We present photometric redshifts and associated probability distributions for all detected sources in the Extended Chandra Deep Field South (ECDFS). This work makes use of the most up-to-date data from the Cosmic Assembly Near-IR Deep Legacy Survey (CANDELS) and the Taiwan ECDFS Near-Infrared Survey (TENIS) in addition to other data. We also revisit multi-wavelength counterparts for published X-ray sources from the 4 Ms CDFS and 250 ks ECDFS surveys, finding reliable counterparts for 1207 out of 1259 sources (?96%). Data used for photometric redshifts include intermediate-band photometry deblended using the TFIT method, which is used for the first time in this work. Photometric redshifts for X-ray source counterparts are based on a new library of active galactic nuclei/galaxy hybrid templates appropriate for the faint X-ray population in the CDFS. Photometric redshift accuracy for normal galaxies is 0.010 and for X-ray sources is 0.014 and outlier fractions are 4% and 5.2%, respectively. The results within the CANDELS coverage area are even better, as demonstrated both by spectroscopic comparison and by galaxy-pair statistics. Intermediate-band photometry, even if shallow, is valuable when combined with deep broadband photometry. For best accuracy, templates must include emission lines.

  1. FREQUENCY DEPENDENCE OF PULSE WIDTH FOR 150 RADIO NORMAL PULSARS

    SciTech Connect (OSTI)

    Chen, J. L. [Department of Physics and Electronic Engineering, Yuncheng University, 044000, Yuncheng, Shanxi (China); Wang, H. G., E-mail: hgwang.gz@gmail.com [Center for Astrophysics, Guangzhou University, 510006, Guangzhou (China)

    2014-11-01

    The frequency dependence of the pulse width is studied for 150 normal pulsars, mostly selected from the European Pulsar Network, for which the 10% multifrequency pulse widths can be well fit with the Thorsett relationship W {sub 10} = A?{sup ?} + W {sub 10,} {sub min}. The relative fraction of pulse width change between 0.4 GHz and 4.85 GHz, ? = (W {sub 4.85} – W {sub 0.4})/W {sub 0.4}, is calculated in terms of the best-fit relationship for each pulsar. It is found that 81 pulsars (54%) have ? < –10% (group A), showing considerable profile narrowing at high frequencies, 40 pulsars (27%) have –10% ?? ? 10% (group B), meaning a marginal change in pulse width, and 29 pulsars (19%) have ? > 10% (group C), showing a remarkable profile broadening at high frequencies. The fractions of the group-A and group-C pulsars suggest that the profile narrowing phenomenon at high frequencies is more common than the profile broadening phenomenon, but a large fraction of the group-B and group-C pulsars (a total of 46%) is also revealed. The group-C pulsars, together with a portion of group-B pulsars with slight pulse broadening, can hardly be explained using the conventional radius-to-frequency mapping, which only applies to the profile narrowing phenomenon. Based on a recent version of the fan beam model, a type of broadband emission model, we propose that the diverse frequency dependence of pulse width is a consequence of different types of distribution of emission spectra across the emission region. The geometrical effect predicting a link between the emission beam shrinkage and spectrum steepening is tested but disfavored.

  2. Modeling pore corrosion in normally open gold- plated copper connectors.

    SciTech Connect (OSTI)

    Battaile, Corbett Chandler; Moffat, Harry K.; Sun, Amy Cha-Tien; Enos, David George; Serna, Lysle M.; Sorensen, Neil Robert

    2008-09-01

    The goal of this study is to model the electrical response of gold plated copper electrical contacts exposed to a mixed flowing gas stream consisting of air containing 10 ppb H{sub 2}S at 30 C and a relative humidity of 70%. This environment accelerates the attack normally observed in a light industrial environment (essentially a simplified version of the Battelle Class 2 environment). Corrosion rates were quantified by measuring the corrosion site density, size distribution, and the macroscopic electrical resistance of the aged surface as a function of exposure time. A pore corrosion numerical model was used to predict both the growth of copper sulfide corrosion product which blooms through defects in the gold layer and the resulting electrical contact resistance of the aged surface. Assumptions about the distribution of defects in the noble metal plating and the mechanism for how corrosion blooms affect electrical contact resistance were needed to complete the numerical model. Comparisons are made to the experimentally observed number density of corrosion sites, the size distribution of corrosion product blooms, and the cumulative probability distribution of the electrical contact resistance. Experimentally, the bloom site density increases as a function of time, whereas the bloom size distribution remains relatively independent of time. These two effects are included in the numerical model by adding a corrosion initiation probability proportional to the surface area along with a probability for bloom-growth extinction proportional to the corrosion product bloom volume. The cumulative probability distribution of electrical resistance becomes skewed as exposure time increases. While the electrical contact resistance increases as a function of time for a fraction of the bloom population, the median value remains relatively unchanged. In order to model this behavior, the resistance calculated for large blooms has been weighted more heavily.

  3. Normal and lateral Casimir forces between deformed plates

    SciTech Connect (OSTI)

    Emig, Thorsten; Hanke, Andreas; Golestanian, Ramin; Kardar, Mehran [Institut fuer Theoretische Physik, Universitaet zu Koeln, Zuelpicher Strasse 77, D-50937 Cologne (Germany); Institut fuer Theoretische Physik, Universitaet Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart (Germany); Institute for Advanced Studies in Basic Sciences, Zanjan 45195-159 (Iran, Islamic Republic of); Institute for Studies in Theoretical Physics and Mathematics, P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Physics Department, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

    2003-02-01

    The Casimir force between macroscopic bodies depends strongly on their shape and orientation. To study this geometry dependence in the case of two deformed metal plates, we use a path-integral quantization of the electromagnetic field which properly treats the many-body nature of the interaction, going beyond the commonly used pairwise summation (PWS) of van der Waals forces. For arbitrary deformations we provide an analytical result for the deformation induced change in the Casimir energy, which is exact to second order in the deformation amplitude. For the specific case of sinusoidally corrugated plates, we calculate both the normal and the lateral Casimir forces. The deformation induced change in the Casimir interaction of a flat and a corrugated plate shows an interesting crossover as a function of the ratio of the mean plate distance H to the corrugation length {lambda}: For {lambda}<>H. The amplitude of the lateral force between two corrugated plates which are out of registry is shown to have a maximum at an optimal wavelength of {lambda}{approx_equal}2.5 H. With increasing H/{lambda} > or approx. 0.3 the PWS approach becomes a progressively worse description of the lateral force due to many-body effects. These results may be of relevance for the design and operation of novel microelectromechanical systems (MEMS) and other nanoscale devices.

  4. Near-field/altered-zone models report

    SciTech Connect (OSTI)

    Hardin, E. L., LLNL

    1998-03-01

    The U.S. Department of Energy is studying Yucca Mountain as the possible site for the first underground repository for permanent disposal of spent fuel from commercial nuclear reactors as well as for other types high-level nuclear waste. Emplacement of high-level radioactive waste, especially commercial spent nuclear fuel (CSNF), in Yucca Mountain will release a large amount of heat into the rock above and below the repository. The heating rate will decrease with time, creating a thermal pulse. Over a period of several thousand years, the rock temperature will rise initially, then drop when the production of decay heat falls below the rate at which heat escapes from the hot zone. Besides raising the rock temperature, much of this heat will vaporize water, which will then condense in cooler regions. The condensate is likely to form a gravity-driven heat pipe above the repository, creating the possibility that water may drain back onto the waste packages (WPs) or that it may ''shed'' through the pillars between emplacement drifts. The long-term importance of these effects has been investigated through the development, testing, and application of thermohydrologic (TH) models. Other effects, such coupled chemical and mechanical processes, may also influence the movement of water above, within, and below the emplacement drifts. A recent report on thermally driven coupled processes (Hardin and Chesnut, 1997) provides a qualitative assessment of the probable significance of these processes for the Yucca Mountain Site Characterization Project (YMSCP) and is the phenomenological framework for the present report. This report describes the conceptual and numerical models that have been developed to predict the thermal, mechanical, hydrologic, and chemical responses to the cumulative heat production of the potential host rock at Yucca Mountain. As proposed, the repository horizon will be situated within the Topopah Spring tuff, in the adjacent middle nonlithophysal and lower lithophysal units. These units are made up of moderately to densely welded, devitrified, fractured tuff. The rock's chemical composition is comparable to that of typical granite, but has textural features and mineralogical characteristics of large-scale, silicic volcanism. Because the repository horizon will be approximately 300 m below the ground surface and 200 m above the water table, the repository will be partially saturated. The welded tuff matrix in the host units is highly impermeable, but water and gas flow readily through fractures. The degree of fracturing in these units is highly variable, and the hydrologic significance of fracturing is an important aspect of site investigation. This report describes the characterization and modeling of a region around the potential repository--the altered zone--a region in which the temperature will be increased significantly by waste-generated heat. Numerical simulation has shown that, depending on the boundary conditions, rock properties, and repository design features incorporated in the models, the altered zone (AZ) may extend from the water table to the ground surface. This report also describes models of the near field, the region comprising the repository emplacement drifts and the surrounding rock, which are critical to the performance of engineered components. Investigations of near-field and altered-zone (NF/AZ) processes support the design of underground repository facilities and engineered barriers and also provide constraint data for probabilistic calculations of waste-isolation performance (i.e., performance assessment). The approach to investigation, which is an iterative process involving hypothesis testing and experimentation, has relied on conceptualizing engineered barriers and on performance analysis. This report is a collection, emphasizing conceptual and numerical models, of the recent results contributed from studies of NF/AZ processes and of quantitative measures of NF/AZ performance. The selection and presentation of contributions are intended to show the iterative development of understand

  5. Modeling High-Impact Weather and Climate: Lessons From a Tropical Cyclone Perspective

    SciTech Connect (OSTI)

    Done, James; Holland, Greg; Bruyere, Cindy; Leung, Lai-Yung R.; Suzuki-Parker, Asuka

    2012-06-01

    Although the societal impact of a weather event increases with the rarity of the event, our current ability to assess extreme events and their impacts is limited by not only rarity but also by current model fidelity and a lack of understanding of the underlying physical processes. This challenge is driving fresh approaches to assess high-impact weather and climate. Recent lessons learned in modeling high-impact weather and climate are presented using the case of tropical cyclones as an illustrative example. Through examples using the Nested Regional Climate Model to dynamically downscale large-scale climate data the need to treat bias in the driving data is illustrated. Domain size, location, and resolution are also shown to be critical and should be guided by the need to: include relevant regional climate physical processes; resolve key impact parameters; and to accurately simulate the response to changes in external forcing. The notion of sufficient model resolution is introduced together with the added value in combining dynamical and statistical assessments to fill out the parent distribution of high-impact parameters. Finally, through the example of a tropical cyclone damage index, direct impact assessments are presented as powerful tools that distill complex datasets into concise statements on likely impact, and as highly effective communication devices. Capsule: "Combining dynamical modeling of high-impact weather using traditional regional climate models with statistical techniques allows for comprehensive sampling of the full distribution, uncertainty estimation, direct assessment of impacts, and increased confidence in future changes."

  6. Modeling High-Impact Weather and Climate: Lessons From a Tropical Cyclone Perspective

    SciTech Connect (OSTI)

    Done, James; Holland, Greg; Bruyere, Cindy; Leung, Lai-Yung R.; Suzuki-Parker, Asuka

    2013-10-19

    Although the societal impact of a weather event increases with the rarity of the event, our current ability to assess extreme events and their impacts is limited by not only rarity but also by current model fidelity and a lack of understanding of the underlying physical processes. This challenge is driving fresh approaches to assess high-impact weather and climate. Recent lessons learned in modeling high-impact weather and climate are presented using the case of tropical cyclones as an illustrative example. Through examples using the Nested Regional Climate Model to dynamically downscale large-scale climate data the need to treat bias in the driving data is illustrated. Domain size, location, and resolution are also shown to be critical and should be guided by the need to: include relevant regional climate physical processes; resolve key impact parameters; and to accurately simulate the response to changes in external forcing. The notion of sufficient model resolution is introduced together with the added value in combining dynamical and statistical assessments to fill out the parent distribution of high-impact parameters. Finally, through the example of a tropical cyclone damage index, direct impact assessments are resented as powerful tools that distill complex datasets into concise statements on likely impact, and as highly effective communication devices.

  7. Near-threshold $J/?$ photoproduction off nuclei

    E-Print Network [OSTI]

    E. Ya. Paryev; Yu. T. Kiselev

    2015-10-01

    We study the $J/\\psi$ photoproduction from nuclei near the kinematic threshold within the first collision model, based on the nuclear spectral function, for incoherent primary photon--nucleon charmonium creation processes. The model takes into account the final $J/\\psi$ absorption, target nucleon binding and Fermi motion, the formation length of $J/\\psi$ mesons as well as the effect of their nuclear mean-field potential on these processes. We calculate the A dependences of the absolute and relative (transparency ratio) charmonium yields as well as its absolute and relative excitation functions within the different scenarios for the $J/\\psi N$ absorption cross section, for the $J/\\psi$ formation length and for $J/\\psi$ in-medium modification. We demonstrate that the studied observables, on the one hand, are not practically affected by the charmonium formation length and mass shift effects and, on the other hand, they are appreciably sensitive to the genuine $J/\\psi N$ absorption cross section at above threshold beam energies, which means that these observables can be useful to help determine the $J/\\psi N$ absorption cross section from the comparison of the results of our calculations with the future data from the experiments in the Hall C at the upgraded up to 12 GeV CEBAF facility. We also show that the absolute and relative excitation functions for $J/\\psi$ subthreshold production in ${\\gamma}A$ reactions reveal some sensitivity to adopted in-medium modification scenarios for $J/\\psi$ mesons. Therefore, such observables, measured in the subthreshold energy domain, may be an important tool to get valuable information on the charmonium in-medium properties in cold nuclear matter.

  8. Control of normal and abnormal bipolar resistive switching by interface junction on In/Nb:SrTiO{sub 3} interface

    SciTech Connect (OSTI)

    Sun, J.; Jia, C. H.; Li, G. Q.; Zhang, W. F.

    2012-09-24

    The resistive switching behaviors of indium (In)/Nb:SrTiO{sub 3} (NSTO) with different metal/semiconductor contacts are investigated. The In electrodes with the Schottky contacts are fabricated on NSTO surface using direct current reactive magnetron sputtering, and the fresh In is directly pressed to form the Ohmic contact. The device with one Schottky barrier displays a normal bipolar resistive switching (BRS) behavior, while the device with two Schottky barriers shows an abnormal BRS behavior. The results demonstrate that the injection and trapping or detrapping of carriers near the interface between the metal electrode and semiconductor are closely related to the resistive switching performance.

  9. Method for solvent extraction with near-equal density solutions

    DOE Patents [OSTI]

    Birdwell, Joseph F. (Knoxville, TN); Randolph, John D. (Maryville, TN); Singh, S. Paul (Oak Ridge, TN)

    2001-01-01

    Disclosed is a modified centrifugal contactor for separating solutions of near equal density. The modified contactor has a pressure differential establishing means that allows the application of a pressure differential across fluid in the rotor of the contactor. The pressure differential is such that it causes the boundary between solutions of near-equal density to shift, thereby facilitating separation of the phases. Also disclosed is a method of separating solutions of near-equal density.

  10. Mixing it up - Measuring diffusion in supercooled liquid solutions of methanol and ethanol at temperatures near the glass transition

    SciTech Connect (OSTI)

    Matthiesen, Jesper; Smith, R. Scott; Kay, Bruce D.

    2011-03-17

    Do liquid mixtures, cooled to temperatures below their freezing point, behave as normal liquids? We address this question using nanoscale films of methanol and ethanol supercooled liquid solutions of varying composition (7 -93% methanol) at temperatures near their glass transition,Tg. The permeation of Kr through these films is used to determine the diffusivities of the supercooled liquid mixtures. We find that the temperature dependent diffusivities of the mixtures are well-fit by a Vogel-Fulcher-Tamman equation indicating that the mixtures exhibit fragile behavior at temperatures just above their Tg. Further, for a given temperature, the composition dependent diffusivity is well-fit by a Vignes-type equation, i.e. the diffusivity of any mixture can be predicted using an exponential weighting of the diffusion of the pure methanol and ethanol diffusivities. These results show that deeply supercooled liquid mixtures can be used to provide valuable insight into the properties of normal liquid mixtures.

  11. Tropical implicitization

    E-Print Network [OSTI]

    Cueto, Maria Angelica

    2010-01-01

    Macaulay2/, 2009. [45] Paul Hacking, Sean Keel, and Jeniatropicalization developed by Hacking, Keel and Tevelev.and further developed by Hacking, Keel and Tevelev [45]. The

  12. Demolition/Construction to Close Parking Areas Near Accelerator...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    DemolitionConstruction to Close Parking Areas Near Accelerator Site Entrance Demolition of the two Radiation Control Department trailers and Building 52 is expected to begin on...

  13. NEAR-FIELD IMAGING OF OBSTACLES Peijun Li and Yuliang ...

    E-Print Network [OSTI]

    2015-01-15

    applications in modern science and technology, such as nanotechnology, biology, information storage, and surface chemistry. Using near-field imaging, we

  14. Numerical solution of inverse scattering for near-field optics

    E-Print Network [OSTI]

    2007-04-30

    May 2, 2007 ... tering problem that arises in near-field optics, which reconstructs the scatterer of an inhomogeneous me- dium located on a substrate from data ...

  15. Secretary Chu Announces Nearly $300 Million Rebate Program to...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Rebate Program to Encourage Purchases of Energy Efficient Appliances Secretary Chu Announces Nearly 300 Million Rebate Program to Encourage Purchases of Energy Efficient...

  16. DOE Hydrogen Program Saved Nearly 30 Million by Investing in...

    Broader source: Energy.gov (indexed) [DOE]

    of Energy's Office of Energy Efficiency and Renewable Energy, outllines how "DOE Hydrogen Program Saved Nearly 30 Million by Investing in Annual In-Progress Peer Reviews."...

  17. Molecular Structure and Ion Transport near Electrode-Electrolyte...

    Office of Scientific and Technical Information (OSTI)

    Structure and Ion Transport near Electrode-Electrolyte Interfaces in Lithium-Ion Batteries Citation Details In-Document Search Title: Molecular Structure and Ion Transport...

  18. Electrohydraulic Forming of Near Net Shape Automotive Panels

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Electrohydraulic Forming of Near Net Shape Automotive Panels The Development of Advancing Automotive Panel Manufacturing for Increased Energy and Material Savings The U.S....

  19. EIS-0407: Abengoa Biomass Bioenergy Project near Hugoton, Stevens...

    Broader source: Energy.gov (indexed) [DOE]

    6, 2011 EIS-0407: Record of Decision Issuance of a Loan Guarantee to Abengoa Bioenergy Biomass of Kansas, LLC for the Abengoa Biorefinery Project Near Hugoton, Stevens County,...

  20. Identification and Evaluation of Near-term Opportunities for...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    and Evaluation of Near-term Opportunities for Efficiency Improvement First- and Second-Law thermodynamic evaluation of experimental engine data and detailed modeling of engine...