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Sample records for hd ngv potential

  1. Growth of the NGV Market: Lessons Learned Roadmap for Infrastructure...

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

    Growth of the NGV Market: Lessons Learned Roadmap for Infrastructure Development Growth of the NGV Market: Lessons Learned Roadmap for Infrastructure Development Presented at ...

  2. Final Report on National NGV Infrastructure

    SciTech Connect (OSTI)

    GM Sverdrup; JG DeSteese; ND Malcosky

    1999-01-07

    This report summarizes work fimded jointly by the U.S. Department of Energy (DOE) and by the Gas Research Institute (GRI) to (1) identi& barriers to establishing sustainable natural gas vehicle (NGV) infrastructure and (2) develop planning information that can help to promote a NGV infrastructure with self-sustaining critical maw. The need for this work is driven by the realization that demand for NGVS has not yet developed to a level that provides sufficient incentives for investment by the commercial sector in all necessary elements of a supportive infrastructure. The two major objectives of this project were: (1) to identifi and prioritize the technical barriers that may be impeding growth of a national NGV infrastructure and (2) to develop input that can assist industry in overcoming these barriers. The approach used in this project incorporated and built upon the accumulated insights of the NGV industry. The project was conducted in three basic phases: (1) review of the current situation, (2) prioritization of technical infrastructure btiiers, and (3) development of plans to overcome key barriers. An extensive and diverse list of barriers was obtained from direct meetings and telephone conferences with sixteen industry NGV leaders and seven Clean Cities/Clean Corridors coordinators. This information is filly documented in the appendix. A distillation of insights gained in the interview process suggests that persistent barriers to developing an NGV market and supporting infrastructure can be grouped into four major categories: 1. Fuel station economics 2. Value of NGVs from the owner/operator perspective 3. Cooperation necessary for critical mass 4. Commitment by investors. A principal conclusion is that an efficient and effective approach for overcoming technical barriers to developing an NGV infrastructure can be provided by building upon and consolidating the relevant efforts of the NGV industry and government. The major recommendation of this project is the establishment of an ad hoc NGV Infrastructure Working Group (NGV-I WG) to address the most critical technical barriers to NGV infrastructure development. This recommendation has been considered and approved by both the DOE and GRI and is the basis of continued collaboration in this area.

  3. NGV fleet fueling station business plan: A public, private and utility partnership to identify economical business options for implementation of CNG fueling infrastructure

    SciTech Connect (OSTI)

    Not Available

    1993-07-01

    The City of Long Beach recently incorporated an additional 61 natural gas vehicles (NGV) within its own fleet, bringing the City`s current NGV fleet to 171 NGVs. During January 1992, the City opened its first public access compressed natural gas (CNG) fueling station (86 CFM). This action served as the City`s first step toward developing the required CNG infrastructure to accommodate its growing NGV fleet, as well as those of participating commercial and private fleet owners. The City of Long Beach is committed to promoting NGVs within its own fleet, as well as encouraging NGV use by commercial and private fleet owners and resolving market development barriers. The NGV Business Plan provides recommendations for priority locations, station size and design, capital investment, partnership and pricing options. The NGV Business Plan also includes an econometric model to calculate CNG infrastructure cost recovery options, based on CNG market research within the City of Long Beach and Southern California area. Furthermore, the NGV Business Plan provides the City with a guide regarding CNG infrastructure investment, partnerships and private fueling programs. Although the NGV Business Plan was developed to address the prevailing CNG-related issues affecting the City of Long Beach, the methodology used within the NGV Business Plan and, more significantly, the accompanying econometric model will assist local governments, nation-wide, in the successful implementation of similar CNG infrastructures required for effective market penetration of NGVs.

  4. Combatting urban air pollution through Natural Gas Vehicle (NGV) analysis, testing, and demonstration

    SciTech Connect (OSTI)

    1995-03-01

    Deteriorating urban air quality ranks as a top concern worldwide, since air pollution adversely affects both public health and the environment. The outlook for improving air quality in the world`s megacities need not be bleak, however, The use of natural gas as a transportation fuel can measurably reduce urban pollution levels, mitigating chronic threats to health and the environment. Besides being clean burning, natural gas vehicles (NGVs) are economical to operate and maintain. The current cost of natural gas is lower than that of gasoline. Natural gas also reduces the vehicle`s engine wear and noise level, extends engine life, and decreases engine maintenance. Today, about 700,000 NGVs operate worldwide, the majority of them converted from gasoline or diesel fuel. This article discusses the economic, regulatory and technological issues of concern to the NGV industry.

  5. Effects of the rotational excitation of D{sub 2} and of the potential energy surface on the H{sup +}+D{sub 2}{yields}HD+D{sup +} reaction

    SciTech Connect (OSTI)

    Gonzalez-Lezana, T. [Instituto de Fisica Fundamental (CSIC), Serrano 123, 28006 Madrid (Spain); Honvault, P. [Institut UTINAM, UMR CNRS 6213 and University of Franche-Comte, Campus de la Bouloie, 25030 Besancon Cedex (France); Jambrina, P. G. [Departamento de Quimica Fisica, Facultad de Ciencias Quimicas, Universidad de Salamanca, 37008 Salamanca (Spain); Departamento de Quimica Fisica I, Facultad de Quimica, Universidad Complutense, 28040 Madrid (Spain); Aoiz, F. J. [Departamento de Quimica Fisica I, Facultad de Quimica, Universidad Complutense, 28040 Madrid (Spain); Launay, J.-M. [Institute de Physique de Rennes, UMR CNRS 6251, University of Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex (France)

    2009-07-28

    The H{sup +}+D{sub 2}{yields}HD+D{sup +} reaction has been theoretically investigated by means of an exact quantum mechanical approach, a quasiclassical trajectory method, and two statistical methods based in the propagation of either wave functions or trajectories. The study addresses the possible changes on the overall dynamics of the title reaction when the D{sub 2} diatom is rotationally excited to its v=0, j=1 state. In addition, the reactivity for the ground rotational state on two different potential energy surfaces (PESs), namely, the surface by Aguado et al. [J. Chem. Phys. 112, 1240 (2000)] and the PES by Kamisaka et al. [J. Chem. Phys. 116, 654 (2002)], is examined. Reaction probabilities and cross sections at 0.524 and 0.1 eV collision energies are calculated. The major differences with respect to the reaction initiated with D{sub 2} in its ground rovibrational state are observed for the lowest collision energy E{sub c}=0.1 eV. Differential cross sections have been found to depend to some extend on the PES employed. In addition, at E{sub c}=0.1 eV further discrepancies in the total and rotational cross sections are noticeable.

  6. H-D Electric Coop Inc | Open Energy Information

    Open Energy Info (EERE)

    H-D Electric Coop Inc Jump to: navigation, search Name: H-D Electric Coop Inc Place: South Dakota Phone Number: 605.874.2171 Website: www.h-delectric.coop Facebook: https:...

  7. H-D Electric Coop Inc (Minnesota) | Open Energy Information

    Open Energy Info (EERE)

    H-D Electric Coop Inc (Minnesota) Jump to: navigation, search Name: H-D Electric Coop Inc Place: Minnesota Phone Number: 605.874.2171 Website: www.h-delectric.coopindex.htm...

  8. HOT DEBRIS DUST AROUND HD 106797

    SciTech Connect (OSTI)

    Fujiwara, Hideaki; Onaka, Takashi; Yamashita, Takuya; Ishihara, Daisuke; Kataza, Hirokazu; Ootsubo, Takafumi; Murakami, Hiroshi; Nakagawa, Takao; Hirao, Takanori; Enya, Keigo; Fukagawa, Misato; Marshall, Jonathan P.; White, Glenn J.

    2009-04-10

    Photometry of the A0 V main-sequence star HD 106797 with AKARI and Gemini/T-ReCS is used to detect excess emission over the expected stellar photospheric emission between 10 and 20 {mu}m, which is best attributed to hot circumstellar debris dust surrounding the star. The temperature of the debris dust is derived as T {sub d} {approx} 190 K by assuming that the excess emission is approximated by a single temperature blackbody. The derived temperature suggests that the inner radius of the debris disk is {approx}14 AU. The fractional luminosity of the debris disk is 1000 times brighter than that of our own zodiacal cloud. The existence of such a large amount of hot dust around HD 106797 cannot be accounted for by a simple model of the steady state evolution of a debris disk due to collisions, and it is likely that transient events play a significant role. Our data also show a narrow spectral feature between 11 and 12 {mu}m attributable to crystalline silicates, suggesting that dust heating has occurred during the formation and evolution of the debris disk of HD 106797.

  9. Development and Demonstration of a Fuel-Efficient HD Engine ...

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

    Development and Demonstration of a Fuel-Efficient HD Engine (DOE SuperTruck Program) Discusses engine efficiency contributions of enhanced fuel injection rematched to new piston ...

  10. HD Truck and Engine Fuel Efficiency Opportunities and Challenges...

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

    HD Truck and Engine Fuel Efficiency Opportunities and Challenges Post EPA2010 The key to successful commercialization of clean and efficient ICEs is technology integration to meet ...

  11. The Potential of Elelcltric Exhaust Gas Turbocharging for HD...

    Broader source: Energy.gov (indexed) [DOE]

    Design & Development of e-TurboTM for SUV and Light Truck Applications Downspeeding a Heavy-Duty Pickup Truck with a Combined Supercharger and Turbocharger Boosting System to ...

  12. NGV and FCV Light Duty Transportation Perspective

    Broader source: Energy.gov [DOE]

    Presentation by Matt Fronk, Matt Fronk and Associates, LLC, at the Natural Gas and Hydrogen Infrastructure Opportunities Workshop held October 18-19, 2011, in Lemont, Illinois.

  13. Technological advancements in NGV station design

    SciTech Connect (OSTI)

    Ledbetter, G.S.; Grimmer, J.E.; Ketcham, E.T.

    1995-12-31

    Hurricane Compressors` SPRINT System (patent pending) is designed to increase the rate of flow from compressed natural gas (CNG) fuel stations and provide greater utilization of stored CNG than is available from traditional compressor stations. Using a novel method of adapting compressor operation to changes in CNG storage system pressures, this advanced technology provides an alternative mechanism for fuel delivery when demand for fuel is high. Transfer of CNG may be made at higher rates of flow than would be possible either from a pressure depleted storage system or directly from the compressor.

  14. Potential

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

    Potential and Frictional Drag on a Floating Sphere in a Flowing Plasma I. H. Hutchinson Plasma Science and Fusion Center Massachusetts Institute of Technology, Cambridge, MA, USA...

  15. RADIO OBSERVATIONS OF HD 80606 NEAR PLANETARY PERIASTRON

    SciTech Connect (OSTI)

    Lazio, T. Joseph W.; Farrell, W. M.; Shankland, P. D.; Blank, D. L.

    2010-12-15

    This paper reports Very Large Array observations at 325 and 1425 MHz ({lambda}90 cm and {lambda}20 cm) during and near the periastron passage of HD 80606b on HJD 2454424.86 (2007 November 20). We obtain flux density limits (3{sigma}) of 1.7 mJy and 48 {mu}Jy at 325 and 1425 MHz, respectively, equivalent to planetary luminosity limits of 2.3 x 10{sup 24} erg s{sup -1} and 2.7 x 10{sup 23} erg s{sup -1}. Unfortunately, these are several orders of magnitude above the nominal Jovian value (at 40 MHz) of 2 x 10{sup 18} erg s{sup -1}. The motivation for these observations was that the planetary magnetospheric emission is driven by a stellar wind-planetary magnetosphere interaction so that the planetary luminosity would be elevated near periastron. We estimate that, near periastron, HD 80606b might be as much as 3000 times more luminous than Jupiter. Recent transit observations of HD 80606b provide reasonably stringent constraints on the planetary mass and radius, and, because of the planet's highly eccentric orbit, its rotation period is likely to be 'pseudo-synchronized' to its orbital period, allowing a robust estimate of the former. Consequently, we are able to make relatively robust estimates of the emission frequency of the planetary magnetospheric emission and find it to be around 60-90 MHz. While this is too low for our reported observations, we compare HD 80606b to other high-eccentricity systems and assess the detection possibilities for both near-term and more distant future systems. Of the known high-eccentricity planets, only HD 80606b is likely to be detectable, as the others (HD 20782B and HD 4113) are both lower mass and longer rotational periods, which imply weaker magnetic field strengths. We find that both the forthcoming 'EVLA low band' system, which will operate as low as 65 MHz, and the Low Frequency Array may be able to improve upon our planetary luminosity limits for HD 80606b, and do so at a more optimum frequency. If the low-frequency component of the Square Kilometre Array (SKA-lo) and a future lunar radio array are able to approach their thermal noise limits, they should be able to detect an HD 80606b-like planet, unless the amount by which the planet's luminosity increases is substantially less than the factor of 3000 that we estimate; for the SKA-lo, which is to be located in the southern hemisphere, future planetary surveys will have to find southern hemisphere equivalents of HD 80606b.

  16. Cummins MD & HD Accessory Hybridization CRADA -Annual Report FY15

    SciTech Connect (OSTI)

    Deter, Dean D.

    2015-10-01

    There are many areas of MD and HD vehicles that can be improved by new technologies and optimized control strategies. Component optimization and idle reduction need to be addressed, this is best done by a two part approach that includes selecting the best component technology, and/or architecture, and optimized controls that are vehicle focused. While this is a common focus in the light duty industry it has been gaining momentum in the MD and HD market as the market gets more competitive and the regulations become more stringent. When looking into systems optimization and idle reduction technologies, affected vehicle systems must first be considered, and if possible included in the new architecture to get the most benefit out of these new capabilities. Typically, when looking into idle reduction or component optimization for MD/HD, the vehicle s accessories become a prime candidate for electrification or hybridization. While this has already been studied on light duty vehicles (especially on hybrids and electric vehicles) it has not made any head way or market penetration in most MD and HD applications. If hybrids and electric MD and HD vehicles begin to break into the market this would be a necessary step into the ability to make those vehicles successful by allowing for independent, optimized operation separate from the engine.

  17. FMI-HD High-Definition Formation Microimager | Open Energy Information

    Open Energy Info (EERE)

    2013 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for FMI-HD High-Definition Formation Microimager Citation Schlumberger. FMI-HD...

  18. The 4.5 ?m full-orbit phase curve of the hot Jupiter HD 209458b

    SciTech Connect (OSTI)

    Zellem, Robert T.; Griffith, Caitlin A.; Showman, Adam P.; Lewis, Nikole K.; Knutson, Heather A.; Fortney, Jonathan J.; Laughlin, Gregory; Cowan, Nicolas B.; Agol, Eric; Burrows, Adam; Charbonneau, David; Deming, Drake; Langton, Jonathan

    2014-07-20

    The hot Jupiter HD 209458b is particularly amenable to detailed study as it is among the brightest transiting exoplanet systems currently known (V-mag = 7.65; K-mag = 6.308) and has a large planet-to-star contrast ratio. HD 209458b is predicted to be in synchronous rotation about its host star with a hot spot that is shifted eastward of the substellar point by superrotating equatorial winds. Here we present the first full-orbit observations of HD 209458b, in which its 4.5 ?m emission was recorded with Spitzer/IRAC. Our study revises the previous 4.5 ?m measurement of HD 209458b's secondary eclipse emission downward by ?35% to 0.1391%{sub ?0.0069%}{sup +0.0072%}, changing our interpretation of the properties of its dayside atmosphere. We find that the hot spot on the planet's dayside is shifted eastward of the substellar point by 40.9 6.0, in agreement with circulation models predicting equatorial superrotation. HD 209458b's dayside (T{sub bright} = 1499 15 K) and nightside (T{sub bright} = 972 44 K) emission indicate a day-to-night brightness temperature contrast smaller than that observed for more highly irradiated exoplanets, suggesting that the day-to-night temperature contrast may be partially a function of the incident stellar radiation. The observed phase curve shape deviates modestly from global circulation model predictions potentially due to disequilibrium chemistry or deficiencies in the current hot CH{sub 4} line lists used in these models. Observations of the phase curve at additional wavelengths are needed in order to determine the possible presence and spatial extent of a dayside temperature inversion, as well as to improve our overall understanding of this planet's atmospheric circulation.

  19. The chemical abundances of the Ap star HD94660

    SciTech Connect (OSTI)

    Giarrusso, M. [Universit di Catania, Dipartimento di Fisica e Astronomia, Sezione Astrofisica, Via S. Sofia 78, 95123 Catania (Italy); INAF - Osservatorio Astrofisico di Catania, via S. Sofia 78, 95123 Catania (Italy); INFN - Laboratori Nazionali del Sud (Italy)

    2014-05-09

    In this work I present the determination of chemical abundances of the Ap star HD94660, a possible rapid oscillating star. As all the magnetic chemically peculiar objects, it presents CNO underabundance and overabundance of iron peak elements of ?100 times and of rare earths up to 4 dex with respect to the Sun. The determination was based on the conversion of the observed equivalent widths into abundances simultaneously to the determination of effective temperature and gravity. Since the Balmer lines of early type stars are very sensitive to the surface gravity while the flux distribution is sensitive to the effective temperature, I have adopted an iterative procedure to match the H{sub ?} line profile and the observed UV-Vis-NIR magnitudes of HD94660 looking for a consistency between the metallicity of the atmosphere model and the derived abundances. From my spectroscopic analysis, this star belongs to the no-rapid oscillating class.

  20. DIRECT SPECTRUM OF THE BENCHMARK T DWARF HD19467B

    SciTech Connect (OSTI)

    Crepp, Justin R.; Matthews, Christopher T.; Rice, Emily L.; Giorla, Paige; Veicht, AAron; Nilsson, Ricky; Luszcz-Cook, Statia H.; Oppenheimer, Rebecca; Brenner, Douglas; Aguilar, Jonathan; Pueyo, Laurent; Sivaramakrishnan, Anand; Soummer, Remi; Hinkley, Sasha; Hillenbrand, Lynne A.; Vasisht, Gautam; Cady, Eric; Lockhart, Thomas; Roberts, Lewis C. Jr.; Beichman, Charles A.; and others

    2015-01-10

    HD19467B is presently the only directly imaged T dwarf companion known to induce a measurable Doppler acceleration around a solar-type star. We present spectroscopy measurements of this important benchmark object taken with the Project 1640 integral field unit at Palomar Observatory. Our high-contrast R ? 30 observations obtained simultaneously across the JH bands confirm the cold nature of the companion as reported from the discovery article and determine its spectral type for the first time. Fitting the measured spectral energy distribution to SpeX/IRTF T dwarf standards and synthetic spectra from BT-Settl atmospheric models, we find that HD19467B is a T5.5 1 dwarf with effective temperature T{sub eff}=978{sub ?43}{sup +20}K. Our observations reveal significant methane absorption affirming its substellar nature. HD19467B shows promise to become the first T dwarf that simultaneously reveals its mass, age, and metallicity independent from the spectrum of light that it emits.

  1. SHADOWS CAST BY A WARP IN THE HD 142527 PROTOPLANETARY DISK

    SciTech Connect (OSTI)

    Marino, S.; Perez, S.; Casassus, S.

    2015-01-10

    Detailed observations of gaps in protoplanetary disks have revealed structures that drive current research on circumstellar disks. One such feature is the two intensity nulls seen along the outer disk of the HD 142527 system, which are particularly well traced in polarized differential imaging. Here we propose that these are shadows cast by the inner disk. The inner and outer disk are thick, in terms of the unit-opacity surface in the H band, so that the shape and orientation of the shadows inform on the three-dimensional structure of the system. Radiative transfer predictions on a parametric disk model allow us to conclude that the relative inclination between the inner and outer disks is 70° ± 5°. This finding taps the potential of high-contrast imaging of circumstellar disks, and bears consequences on the gas dynamics of gapped disks, as well as on the physical conditions in the shadowed regions.

  2. H.D. Cochran, Questions for the Workshop | U.S. DOE Office of...

    Office of Science (SC) Website

    H.D. Cochran, Questions for the Workshop Chemical Sciences, Geosciences, & Biosciences (CSGB) Division CSGB Home About Research Areas Reports and Activities Science Highlights ...

  3. THE NEARBY, YOUNG, ISOLATED, DUSTY STAR HD 166191

    SciTech Connect (OSTI)

    Schneider, Adam; Song, Inseok; Hufford, Tara; Melis, Carl; Zuckerman, B.; Bessell, Mike; Hinkley, Sasha E-mail: song@physast.uga.edu E-mail: cmelis@ucsd.edu E-mail: bessell@mso.anu.edu.au

    2013-11-01

    We report an in-depth study of the F8-type star HD 166191, identified in an ongoing survey for stars exhibiting infrared emission above their expected photospheres in the Wide-field Infrared Survey Explorer all-sky catalog. The fractional IR luminosity measured from 3.5 to 70 μm is exceptionally high (L{sub IR}/L{sub bol} ∼ 10%). Near-diffraction-limited imaging observations with the T-ReCS Si filter set on the Gemini South telescope and adaptive optics imaging with the NIRC2 Lp filter on the Keck II telescope confirmed that the excess emission coincides with the star. Si-band images show a strong solid-state emission feature at ∼10 μm. Theoretical evolutionary isochrones and optical spectroscopic observations indicate a stellar age in the range 10-100 Myr. The large dust mass seen in HD 166191's terrestrial planet zone is indicative of a recent collision between planetary embryos or massive ongoing collisional grinding associated with planet building.

  4. Growth of the NGV Market: Lessons Learned Roadmap for Infrastructure

    Broader source: Energy.gov (indexed) [DOE]

    of 2014 | Department of Energy Bioenergy Technologies Office (BETO) forms cost-share public-private partnerships to help sustainably develop cost-competitive biofuels and bioproducts in the United States from non-food biomass resources. PDF icon accomplishments_two_pager_2014.pdf More Documents & Publications Bioenergy Technologies Office FY 2016 Budget At-A-Glance September 2014 Monthly News Blast Bioenergy Impact Posters Development | Department of Energy

    Refueling

  5. On-Road Particle Matter Emissions from a MY 2010 Compliant HD...

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

    from a 2010 compliant HD Diesel tractor while traveling on-road for 2300 miles found average gravimetric TPM over the entire route to be well below EPAs 2010 PM standard. ...

  6. The HD 5980 multiple system: Masses and evolutionary status

    SciTech Connect (OSTI)

    Koenigsberger, Gloria [Instituto de Ciencias Fsicas, Universidad Nacional Autnoma de Mxico, Ave. Universidad S/N, Cuernavaca, Morelos 62210 (Mexico); Morrell, Nidia [Las Campanas Observatory, The Carnegie Observatories, Colina El Pino s/n, Casillas 601, La Serena (Chile); Hillier, D. John [Department of Physics and Astronomy, and Pittsburgh Particle Physics, Astrophysics and Cosmology Center (PITT PACC), 3941 O'Hara Street, University of Pittsburgh, Pittsburgh, PA 15260 (United States); Gamen, Roberto [Facultad de Ciencias Astronmicas y Geofsicas, Universidad Nacional de La Plata, and Instituto de Astrofsica de La Plata (CCT La Plata-CONICET), Paseo del Bosque S/N, B1900FWA La Plata (Argentina); Schneider, Fabian R. N.; Gonzlez-Jimnez, Nicols; Langer, Norbert [Argelander-Institut fr Astronomie, Auf dem Hgel 71, D-53121 Bonn (Germany); Barb, Rodolfo, E-mail: gloria@astro.unam.mx, E-mail: nmorrell@lco.edu, E-mail: hillier@pitt.edu, E-mail: rgamen@fcaglp.unlp.edu.ar, E-mail: fschneid@astro.uni-bonn.de, E-mail: ngonzalez@astro.uni-bonn.de, E-mail: nlanger@astro.uni-bonn.de, E-mail: rbarba@dfuls.cl [Departamento de Fsica, Av. Juan Cisternas 1200 Norte, Universidad de la Serena, La Serena (Chile)

    2014-10-01

    New spectroscopic observations of the LBV/WR multiple system HD 5980 in the Small Magellanic Cloud are used to address the question of the masses and evolutionary status of the two very luminous stars in the 19.3 day eclipsing binary system. Two distinct components of the N V 4944 line are detected in emission and their radial velocity variations are used to derive masses of 61 and 66 M {sub ?}, under the assumption that binary interaction effects on this atomic transition are negligible. We propose that this binary system is the product of quasi-chemically homogeneous evolution with little or no mass transfer. Thus, both of these binary stars may be candidates for gamma-ray burst progenitors or even pair instability supernovae. Analysis of the photospheric absorption lines belonging to the third-light object in the system confirm that it consists of an O-type star in a 96.56 day eccentric orbit (e = 0.82) around an unseen companion. The 5:1 period ratio and high eccentricities of the two binaries suggest that they may constitute a hierarchical quadruple system.

  7. H.D. Cochran, Questions for the Workshop | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    H.D. Cochran, Questions for the Workshop Chemical Sciences, Geosciences, & Biosciences (CSGB) Division CSGB Home About Research Areas Reports and Activities Science Highlights Principal Investigators' Meetings BES Home Third DOE BES Separations Research Workshop H.D. Cochran, Questions for the Workshop Print Text Size: A A A FeedbackShare Page Third DOE/Basic Energy Sciences Separations Research Workshop Savannah DeSoto Hilton, Savannah, Georgia May 12-14, 1999 Questions for the Workshop H.

  8. Does the debris disk around HD 32297 contain cometary grains?

    SciTech Connect (OSTI)

    Rodigas, Timothy J.; Hinz, Philip M.; Bailey, Vanessa; Defrere, Denis; Leisenring, Jarron; Schneider, Glenn; Skemer, Andrew J.; Vaitheeswaran, Vidhya; Debes, John H.; Mamajek, Eric E.; Pecaut, Mark J.; Currie, Thayne; De Rosa, Robert J.; Ward-Duong, Kimberly; Hill, John M.; Skrutskie, Michael

    2014-03-01

    We present an adaptive optics imaging detection of the HD 32297 debris disk at L' (3.8 ?m) obtained with the LBTI/LMIRcam infrared instrument at the Large Binocular Telescope. The disk is detected at signal-to-noise ratio per resolution element ?3-7.5 from ?0.''3 to 1.''1 (30-120 AU). The disk at L' is bowed, as was seen at shorter wavelengths. This likely indicates that the disk is not perfectly edge-on and contains highly forward-scattering grains. Interior to ?50 AU, the surface brightness at L' rises sharply on both sides of the disk, which was also previously seen at Ks band. This evidence together points to the disk containing a second inner component located at ?50 AU. Comparing the color of the outer (50

  9. The Potential of Elelcltric Exhaust Gas Turbocharging for HD DIesel Engines

    Broader source: Energy.gov (indexed) [DOE]

    | Department of Energy 5 Diesel Engine Emissions Reduction (DEER) Conference Presentations and Posters PDF icon 2005_deer_millo.pdf More Documents & Publications Design & Development of e-TurboTM for SUV and Light Truck Applications Downspeeding a Heavy-Duty Pickup Truck with a Combined Supercharger and Turbocharger Boosting System to Improve Drive Cycle Fuel Economy Design and Development of e-Turbo for SUV and Light Truck Applications

  10. THE GEMINI NICI PLANET-FINDING CAMPAIGN: DISCOVERY OF A MULTIPLE SYSTEM ORBITING THE YOUNG A STAR HD 1160

    SciTech Connect (OSTI)

    Nielsen, Eric L.; Liu, Michael C.; Wahhaj, Zahed; Bowler, Brendan; Kraus, Adam; Chun, Mark; Ftaclas, Christ; Biller, Beth A.; Hayward, Thomas L.; Shkolnik, Evgenya L.; Tecza, Matthias; Clarke, Fraser; Close, Laird M.; Hartung, Markus; Males, Jared R.; Skemer, Andrew J.; Reid, I. Neill; Alencar, Silvia H. P.; Burrows, Adam; and others

    2012-05-01

    We report the discovery of two low-mass companions to the young A0V star HD 1160 at projected separations of 81 {+-} 5 AU (HD 1160 B) and 533 {+-} 25 AU (HD 1160 C) by the Gemini NICI Planet-Finding Campaign. Very Large Telescope images of the system taken over a decade for the purpose of using HD 1160 A as a photometric calibrator confirm that both companions are physically associated. By comparing the system to members of young moving groups and open clusters with well-established ages, we estimate an age of 50{sup +50}{sub -40} Myr for HD 1160 ABC. While the UVW motion of the system does not match any known moving group, the small magnitude of the space velocity is consistent with youth. Near-IR spectroscopy shows HD 1160 C to be an M3.5 {+-} 0.5 star with an estimated mass of 0.22{sup +0.03}{sub -0.04} M{sub Sun }, while NIR photometry of HD 1160 B suggests a brown dwarf with a mass of 33{sup +12}{sub -9} M{sub Jup}. The very small mass ratio (0.014) between the A and B components of the system is rare for A star binaries, and would represent a planetary-mass companion were HD 1160 A to be slightly less massive than the Sun.

  11. Cutaneous uptake of 14C-HD vapor by the hairless guinea pig. Technical report, December 1992-June 1993

    SciTech Connect (OSTI)

    Logan, T.P.; Bongiovanni, R.; Millard, C.B.; Shutz, M.B.; Schultz, S.M.

    1996-10-01

    The hairless guinea pig (HGP) is used by our laboratory to model the human cutaneous response to sulfur mustard (HD) exposure. We have determined the HD content in the skin of HOP after 7-minute exposures to vapors saturated with a mixture of HD and 14C-HD. Concentration/time (C1) values in the range of 2 mg/sq cm/min were determined by counting skin 14C disintegrations per minute (dpm) in animals euthanized immediately after exposure. These values are similar to human penetration rates obtained by other investigators. A direct relationship between C1 and relative humidity was demonstrated in 5 of 6 studies. A rate curve monitoring the reduction in skin 14C dpm was developed for animals euthanized between 0 and 24 hours post exposure. This curve showed the greatest change after 1 hour. Epidermal and dermal distribution of 14C at 24 hours was measured for two animals. Site preference for HD penetration, multiple use of a vapor cap containing HD, and 14C content of adhesive tape were also investigated with radiolabeled HD to evaluate other aspects of the experimental model. These results contribute to a better understanding of the cutaneous response to HD in the HGP model.

  12. ENERGETIC NEUTRAL ATOMS AROUND HD 209458b: ESTIMATIONS OF MAGNETOSPHERIC PROPERTIES

    SciTech Connect (OSTI)

    Ekenbaeck, A.; Holmstroem, M.; Wurz, P.; Griessmeier, J.-M.; Lammer, H.; Selsis, F.; Penz, T.

    2010-02-01

    HD 209458b is an exoplanet found to transit the disk of its parent star. Observations have shown a broad absorption signature about the Lyalpha stellar line during transit, suggesting the presence of a thick cloud of atomic hydrogen around the 'hot Jupiter' HD 209458b. This work expands on an earlier work studying the production of energetic neutral atoms (ENAs) as a result of the interaction between the stellar wind and the exosphere. We present an improved flow model of HD 209458b and use stellar wind values similar to those in our solar system. We find that the ENA production is high enough to explain the observations, and we show that-using expected values for the stellar wind and exosphere-the spatial and velocity distributions of ENAs would give absorption in good agreement with the observations. We also study how the production of ENAs depends on the exospheric parameters and establish an upper limit for the obstacle standoff distance at approximately 4-10 planetary radii. Finally, we compare the results obtained for the obstacle standoff distance with existing exomagnetospheric models and show how the magnetic moment of HD 209458b can be estimated from ENA observations.

  13. Development and Demonstration of a Fuel-Efficient HD Engine | Department of

    Broader source: Energy.gov (indexed) [DOE]

    Energy Approach to selection of technologies and their contribution to enhance heavy-duty truck fuel efficiency. PDF icon deer12_deojeda.pdf More Documents & Publications Development and Demonstration of a Fuel-Efficient HD Engine (DOE SuperTruck Program)

  14. Advanced HD Engine Systems and Emissions Control Modeling and Analysis |

    Broader source: Energy.gov (indexed) [DOE]

    Department of Energy Three new/under-utilized ground loop designs being evaluated for their ground loop cost reduction potential<br /> Credit: Oak Ridge National Lab Three new/under-utilized ground loop designs being evaluated for their ground loop cost reduction potential Credit: Oak Ridge National Lab Cumulative GSHP conditioned building floor space in the United States and China<br /> Credit: Oak Ridge National Lab Cumulative GSHP conditioned building floor space in the United

  15. Hyperdynamics boost factor achievable with an ideal bias potential

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

    Huang, Chen; Perez, Danny; Voter, Arthur F.

    2015-08-20

    Hyperdynamics is a powerful method to significantly extend the time scales amenable to molecular dynamics simulation of infrequent events. One outstanding challenge, however, is the development of the so-called bias potential required by the method. In this work, we design a bias potential using information about all minimum energy pathways (MEPs) out of the current state. While this approach is not suitable for use in an actual hyperdynamics simulation, because the pathways are generally not known in advance, it allows us to show that it is possible to come very close to the theoretical boost limit of hyperdynamics while maintainingmore » high accuracy. We demonstrate this by applying this MEP-based hyperdynamics (MEP-HD) to metallic surface diffusion systems. In most cases, MEP-HD gives boost factors that are orders of magnitude larger than the best existing bias potential, indicating that further development of hyperdynamics bias potentials could have a significant payoff. Lastly, we discuss potential practical uses of MEP-HD, including the possibility of developing MEP-HD into a true hyperdynamics.« less

  16. HD gas purification for polarized HDice targets production at Jefferson Lab

    SciTech Connect (OSTI)

    Whisnant, Charles; D'Angelo, Annalisa; Colaneri, Luca; Devilbiss, J.; Kageya, Tsuneo; Loving, D.A.; Lowry, Michael; Rizzo, Alessandro; Sandorfi, Andrew; Schaerf, Carlo; Storey, J.D.; Wallace, C.M.; Wei, Xiangdong; Zonta, Irene

    2014-06-01

    Solid, frozen-spin targets of molecular HD were #12;rst developed for nuclear physics by a collaboration between Syracuse University and Brookhaven National Lab. They have been successfully used in measurements with photon beams, #12;rst at the Laser-Electron-Gamma-Source [1] and most recently at Je#11;erson Lab during the running of the E06-101 (g14) experiment [2]. Preparations are underway to utilize the targets in future electron experiments after the completion of the 12 GeV JLab upgrade [3]. HD is an attractive target since all of the material is polarizable, of low Z, and requires only modest holding #12;elds. At the same time, the small contributions from the target cell can be subtracted from direct measurements. Reaching the frozen-spin state with both high polarization and a signi#12;cant spin relaxation time requires careful control of H2 and D2 impurities. Commercially available HD contains 0.5 - 2% concentrations of H2 and D2. Low-temperature distillation is required to reduce these concentrations to the 10􀀀4 level to enable useful target production. This distillation is done using a column #12;lled with heli-pack C [4] to give good separation e#14;ciency. Approximately 12 moles of commercial HD is condensed into the mechanically refrigerated system at the base temperature of 11K. The system is then isolated and the temperature stabilized at 18K producing liquid HD, which is boiled by a resistive heater. The circulation established by the boil-o#11; condensing throughout the column then #12;ltering back down produces a steady-state isotopic separation permitting the extraction of HD gas with very low H2 and D2 content. A residual gas analyzer initially monitors distillation. Once the H2 concentration falls below its useful operating range, samples are periodically collected for analysis using gas chromatography [5] and Raman scattering. Where the measurement techniques overlap, good agreement is obtained. The operation of the distillery and results of gas analysis will be discussed. References [1] Phy. Rev. Lett. 101 (2009) 172002. [2] www.jlab.org/exp_prog/proposals/06/PR-06-101.pdf [3] www.jlab.org/exp_prog/proposals/12/PR12-12-009.pdf, www.jlab.org/exp_prog/proposals/12/PR12-12-010.pdf, and www.jlab.org/exp_prog/proposals/11/PR12-11-111.pdf [4] Nucl. Inst. Meth. 664 (2012) 347, www.wilmad-labglass.com/Products/LG-6730-104/ [5] Rev. Sci. Instrum. 82, 024101 (2011).

  17. Hydraulic HEV Fuel Consumption Potential | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    vss071_rousseau_2012_o.pdf More Documents & Publications Evaluation of Powertrain Options and Component Sizing for MD and HD Applications on Real World Drive Cycles Roadmap and Technical White Papers for 21st Century Truck Partnership Fuel Displacement & Cost Potential of CNG, LNG, and LPG Vehicles

  18. NON-DETECTION OF THE PUTATIVE SUBSTELLAR COMPANION TO HD 149382

    SciTech Connect (OSTI)

    Norris, Jackson M.; Wright, Jason T.; Mahadevan, Suvrath; Gettel, Sara; Wade, Richard A.

    2011-12-10

    It has been argued that a substellar companion may significantly influence the evolution of the progenitors of subdwarf B (sdB) stars. Recently, the bright sdB star HD 149382 has been claimed to host a substellar (possibly planetary) companion with a period of 2.391 days. This has important implications for the evolution of the progenitors of sdB stars as well as the source of the UV excess seen in elliptical galaxies. In order to verify this putative companion, we made 10 radial velocity measurements of HD 149382 over 17 days with the High Resolution Spectrograph at the Hobby-Eberly Telescope. Our data conclusively demonstrate that the putative substellar companion does not exist, and they exclude the presence of almost any substellar companion with P < 28 days and Msin i {approx}> 1 M{sub Jup}.

  19. IMPROVED V II log(gf) VALUES, HYPERFINE STRUCTURE CONSTANTS, AND ABUNDANCE DETERMINATIONS IN THE PHOTOSPHERES OF THE SUN AND METAL-POOR STAR HD 84937

    SciTech Connect (OSTI)

    Wood, M. P.; Lawler, J. E.; Den Hartog, E. A.; Sneden, C.; Cowan, J. J. E-mail: jelawler@wisc.edu E-mail: chris@verdi.as.utexas.edu

    2014-10-01

    New experimental absolute atomic transition probabilities are reported for 203 lines of V II. Branching fractions are measured from spectra recorded using a Fourier transform spectrometer and an echelle spectrometer. The branching fractions are normalized with radiative lifetime measurements to determine the new transition probabilities. Generally good agreement is found between this work and previously reported V II transition probabilities. Two spectrometers, independent radiometric calibration methods, and independent data analysis routines enable a reduction in systematic uncertainties, in particular those due to optical depth errors. In addition, new hyperfine structure constants are measured for selected levels by least squares fitting line profiles in the FTS spectra. The new V II data are applied to high resolution visible and UV spectra of the Sun and metal-poor star HD 84937 to determine new, more accurate V abundances. Lines covering a range of wavelength and excitation potential are used to search for non-LTE effects. Very good agreement is found between our new solar photospheric V abundance, log ε(V) = 3.95 from 15 V II lines, and the solar-system meteoritic value. In HD 84937, we derive [V/H] = –2.08 from 68 lines, leading to a value of [V/Fe] = 0.24.

  20. Fuel economy and emissions reduction of HD hybrid truck over transient

    Broader source: Energy.gov (indexed) [DOE]

    driving cycles and interstate roads | Department of Energy Compares simulated fuel economy and emissions fro conventional and hybrid Class 8 heavy trucks PDF icon p-12_gao.pdf More Documents & Publications Advanced HD Engine Systems and Emissions Control Modeling and Analysis Vehicle Technologies Office: 2014 Vehicle and Systems Simulation and Testing Annual Progress Report Vehicle Technologies Office Merit Review 2014: Advanced Heavy-Duty Engine Systems and Emissions Control Modeling

  1. Measurements of spin observables in pseudo-scalar meson photo-production using polarized neutrons in solid HD

    SciTech Connect (OSTI)

    Kageya, Tsuneo

    2014-01-01

    A measurement of psuedo-scalar meson photo production from longitudinally polarized solid HD has been carried out with the CLAS at Thomas Jefferson National Accelerator Facility (Jlab) with circularly and linearly polarized photon beams. Its aim is to measure a complete set of spin observables for the neutron simultaneously from the same experiment. As a polarized neutron, deutron in HD was used. Preliminary asymmetries are shown for the {pi}{sup -} channel.

  2. Discovery of multiple pulsations in the new ? Scuti star HD 92277: Asteroseismology from Dome A, Antarctica

    SciTech Connect (OSTI)

    Zong, Weikai; Fu, Jian-Ning; Niu, Jia-Shu; Zhu, Zonghong; Charpinet, S.; Vauclair, G.; Ashley, Michael C. B.; Lawrence, Jon S.; Luong-Van, Daniel; Cui, Xiangqun; Gong, Xuefei; Feng, Longlong; Wang, Lifan; Yuan, Xiangyan; Zhu, Zhenxi; Liu, Qiang; Wang, Lingzhi; Zhou, Xu; Pennypacker, Carl R.; York, Donald G.

    2015-02-01

    We report the discovery of low-amplitude oscillations in the star HD 92277 from long, continuous observations in the r and g bands using the CSTAR telescopes in Antarctica. A total of more than 1950 hours of high-quality light curves were used to categorize HD 92277 as a new member of the ? Scuti class. We have detected 21 (20 frequencies are independent and one is the linear combination) and 14 (13 frequencies are independent and one is the linear combination) pulsation frequencies in the r and g bands, respectively, indicating a multi-periodic pulsation behavior. The primary frequency f{sub 1} = 10.810 days{sup ?1} corresponds to a period of 0.0925 days and is an l = 1 mode. We estimate a B ? V index of 0.39 and derive an effective temperature of 6800 K for HD 92277. We conclude that long, continuous and uninterrupted time-series photometry can be performed from Dome A, Antarctica, and that this is especially valuable for asteroseismology where multi-color observations (often not available from space-based telescopes) assist with mode identification.

  3. Nuclear interference in dissociating of HD{sup +} in ultrashort laser fields

    SciTech Connect (OSTI)

    Yang Di [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Cong Shulin [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)

    2011-07-15

    The dissociation dynamics of HD{sup +} molecules is studied theoretically by numerically solving the time-dependent Schroedinger equation in which the molecular vibrational and rotational degrees of freedom are included. Based on the Born-Oppenheimer approximation, the ground 1s{sigma}{sub g} state and the excited 2p{sigma}{sub u} state are taken into account, corresponding to two dissociative channels HD{sup +}{yields}D + H{sup +} and HD{sup +}{yields}H + D{sup +}, respectively. Two dissociative nuclear wave packets overlap and interfere after excited by two ultrashort laser pulses. The interference patterns can be controlled by varying the laser parameters and the dissociation probabilities are demonstrated for different laser fields. The kinetic energy-dependent distributions of the fragments are calculated using an asymptotic-flow expression in the momentum space. The branching ratio D{sup +}/(H{sup +} + D{sup +}), as a function of the delay time and the relative phase between two laser pulses, is also discussed.

  4. RESONANCES REQUIRED: DYNAMICAL ANALYSIS OF THE 24 Sex AND HD 200964 PLANETARY SYSTEMS

    SciTech Connect (OSTI)

    Wittenmyer, Robert A.; Horner, Jonathan; Tinney, C. G.

    2012-12-20

    We perform several suites of highly detailed dynamical simulations to investigate the architectures of the 24 Sextantis and HD 200964 planetary systems. The best-fit orbital solution for the two planets in the 24 Sex system places them on orbits with periods that lie very close to 2:1 commensurability, while that for the HD 200964 system places the two planets therein in orbits whose periods lie close to a 4:3 commensurability. In both cases, the proposed best-fit orbits are mutually crossing-a scenario that is only dynamically feasible if the planets are protected from close encounters by the effects of mutual mean-motion resonance (MMR). Our simulations reveal that the best-fit orbits for both systems lie within narrow islands of dynamical stability, and are surrounded by much larger regions of extreme instability. As such, we show that the planets are only feasible if they are currently trapped in mutual MMR-the 2:1 resonance in the case of 24 Sex b and c, and the 4:3 resonance in the case of HD 200964 b and c. In both cases, the region of stability is strongest and most pronounced when the planetary orbits are mutually coplanar. As the inclination of planet c with respect to planet b is increased, the stability of both systems rapidly collapses.

  5. New analysis indicates no thermal inversion in the atmosphere of HD 209458b

    SciTech Connect (OSTI)

    Diamond-Lowe, Hannah; Stevenson, Kevin B.; Bean, Jacob L.; Line, Michael R.; Fortney, Jonathan J.

    2014-11-20

    An important focus of exoplanet research is the determination of the atmospheric temperature structure of strongly irradiated gas giant planets, or hot Jupiters. HD 209458b is the prototypical exoplanet for atmospheric thermal inversions, but this assertion does not take into account recently obtained data or newer data reduction techniques. We reexamine this claim by investigating all publicly available Spitzer Space Telescope secondary-eclipse photometric data of HD 209458b and performing a self-consistent analysis. We employ data reduction techniques that minimize stellar centroid variations, apply sophisticated models to known Spitzer systematics, and account for time-correlated noise in the data. We derive new secondary-eclipse depths of 0.119% 0.007%, 0.123% 0.006%, 0.134% 0.035%, and 0.215% 0.008% in the 3.6, 4.5, 5.8, and 8.0 ?m bandpasses, respectively. We feed these results into a Bayesian atmospheric retrieval analysis and determine that it is unnecessary to invoke a thermal inversion to explain our secondary-eclipse depths. The data are well fitted by a temperature model that decreases monotonically between pressure levels of 1 and 0.01 bars. We conclude that there is no evidence for a thermal inversion in the atmosphere of HD 209458b.

  6. THE ANGLO-AUSTRALIAN PLANET SEARCH. XX. A SOLITARY ICE-GIANT PLANET ORBITING HD 102365

    SciTech Connect (OSTI)

    Tinney, C. G.; Wittenmyer, Robert A.; Bailey, Jeremy; Butler, R. Paul; Jones, Hugh R. A.; O'Toole, Simon; Carter, Brad D.

    2011-02-01

    We present 12 years of precision Doppler data for the very nearby G3 star HD 102365, which reveals the presence of a Neptune-like planet with a 16.0 M{sub Earth} minimum mass in a 122.1 day orbit. Very few 'Super Earth' planets have been discovered to date in orbits this large and those that have been found reside in multiple systems of between three and six planets. HD 102365 b, in contrast, appears to orbit its star in splendid isolation. Analysis of the residuals to our Keplerian fit for HD 102365 b indicates that there are no other planets with minimum mass above 0.3 M{sub Jup} orbiting within 5 AU and no other 'Super Earths' more massive than 10 M{sub Earth} orbiting at periods shorter than 50 days. At periods of less than 20 days these limits drop to as low as 6 M{sub Earth}. There are now 32 exoplanets known with minimum mass below 20 M{sub Earth}, and interestingly the period distributions of these low-mass planets seem to be similar whether they orbit M-, K-, or G-type dwarfs.

  7. Water vapor in the spectrum of the extrasolar planet HD 189733b. II. The eclipse

    SciTech Connect (OSTI)

    Crouzet, Nicolas; McCullough, Peter R.; Deming, Drake; Madhusudhan, Nikku

    2014-11-10

    Spectroscopic observations of exoplanets are crucial to infer the composition and properties of their atmospheres. HD 189733b is one of the most extensively studied exoplanets and is a cornerstone for hot Jupiter models. In this paper, we report the dayside emission spectrum of HD 189733b in the wavelength range 1.1-1.7 μm obtained with the Hubble Space Telescope Wide Field Camera 3 (WFC3) in spatial scan mode. The quality of the data is such that even a straightforward analysis yields a high-precision Poisson noise-limited spectrum: the median 1σ uncertainty is 57 ppm per 0.02 μm bin. We also build a white-light curve correcting for systematic effects and derive an absolute eclipse depth of 96 ± 39 ppm. The resulting spectrum shows marginal evidence for water vapor absorption, but can also be well explained by a blackbody spectrum. However, the combination of these WFC3 data with previous Spitzer photometric observations is best explained by a dayside atmosphere of HD 189733b with no thermal inversion and a nearly solar or subsolar H{sub 2}O abundance in a cloud-free atmosphere. Alternatively, this apparent subsolar abundance may be the result of clouds or hazes that future studies need to investigate.

  8. THE MASS OF HD 38529c FROM HUBBLE SPACE TELESCOPE ASTROMETRY AND HIGH-PRECISION RADIAL VELOCITIES

    SciTech Connect (OSTI)

    Benedict, G. Fritz; McArthur, Barbara E.; Bean, Jacob L.; Barnes, Rory; Harrison, Thomas E.; Hatzes, Artie; Martioli, Eder; Nelan, Edmund P.

    2010-05-15

    Hubble Space Telescope Fine Guidance Sensor astrometric observations of the G4 IV star HD 38529 are combined with the results of the analysis of extensive ground-based radial velocity (RV) data to determine the mass of the outermost of two previously known companions. Our new RVs obtained with the Hobby-Eberly Telescope and velocities from the Carnegie-California group now span over 11 yr. With these data we obtain improved RV orbital elements for both the inner companion, HD 38529b, and the outer companion, HD 38529c. We identify a rotational period of HD 38529 (P {sub rot} = 31.65 {+-} 0fd17) with Fine Guidance Sensor photometry. The inferred star spot fraction is consistent with the remaining scatter in velocities being caused by spot-related stellar activity. We then model the combined astrometric and RV measurements to obtain the parallax, proper motion, perturbation period, perturbation inclination, and perturbation size due to HD 38529c. For HD 38529c we find P = 2136.1 {+-} 0.3 d, perturbation semimajor axis {alpha} = 1.05 {+-} 0.06 mas, and inclination i = 48.{sup 0}3 {+-} 3.{sup 0}7. Assuming a primary mass M {sub *} = 1.48 M {sub sun}, we obtain a companion mass M{sub c} = 17.6{sup +1.5} {sub -1.2} M {sub Jup}, 3{sigma} above a 13 M {sub Jup} deuterium burning, brown dwarf lower limit. Dynamical simulations incorporating this accurate mass for HD 38529c indicate that a near-Saturn mass planet could exist between the two known companions. We find weak evidence of an additional low amplitude signal that can be modeled as a planetary-mass ({approx}0.17 M {sub Jup}) companion at P {approx}194 days. Including this component in our modeling lowers the error of the mass determined for HD 38529c. Additional observations (RVs and/or Gaia astrometry) are required to validate an interpretation of HD 38529d as a planetary-mass companion. If confirmed, the resulting HD 38529 planetary system may be an example of a 'Packed Planetary System'.

  9. IMPROVED Ni I log(gf) VALUES AND ABUNDANCE DETERMINATIONS IN THE PHOTOSPHERES OF THE SUN AND METAL-POOR STAR HD 84937

    SciTech Connect (OSTI)

    Wood, M. P.; Lawler, J. E.; Sneden, C.; Cowan, J. J. E-mail: jelawler@wisc.edu E-mail: cowan@nhn.ou.edu

    2014-04-01

    Atomic transition probability measurements for 371 Ni I lines in the UV through near-IR are reported. Branching fractions from data recorded using a Fourier transform spectrometer and a new echelle spectrograph are combined with published radiative lifetimes to determine these transition probabilities. Generally good agreement is found in comparisons to previously reported Ni I transition probability measurements. Use of the new echelle spectrograph, independent radiometric calibration methods, and independent data analysis routines enable a reduction of systematic errors and overall improvement in transition probability uncertainty over previous measurements. The new Ni I data are applied to high-resolution visible and UV spectra of the Sun and metal-poor star HD 84937 to derive new, more accurate Ni abundances. Lines covering a wide range of wavelength and excitation potential are used to search for non-LTE effects.

  10. H{sub 2} AND HD DIRECT PHOTODISSOCIATION IN THE CHEMISTRY OF THE PRIMORDIAL UNIVERSE

    SciTech Connect (OSTI)

    Coppola, Carla M.; Diomede, Paola; Longo, Savino; Capitelli, Mario

    2011-01-20

    In this work, we calculate the thermal contribution to the rate coefficients for the processes of photodissociation of H{sub 2} and HD molecules. A comparison between direct and indirect rate coefficients is reported for molecular hydrogen. The rate coefficients are calculated including all vibrational levels of both molecules. Interpolation expressions for all processes are provided as a function of temperature. The resulting total rates for these processes are contextualized by direct numerical calculations based on a standard chemical network for the primordial universe.

  11. On-Road Particle Matter Emissions from a MY 2010 Compliant HD Diesel

    Broader source: Energy.gov (indexed) [DOE]

    Vehicle Driving Across the U.S. | Department of Energy Measuring particle emissions from a 2010 compliant HD Diesel tractor while traveling on-road for 2300 miles found average gravimetric TPM over the entire route to be well below EPAs 2010 PM standard. PDF icon deer12_besch.pdf More Documents & Publications Emergency Filter for Low Pressure EGR Fuel Reformer, LNT and SCR Aftertreatment System Meeting Emissions Useful Life Requirements Development of ADECS to Meet 2010 Emission

  12. NEW PRECISION ORBITS OF BRIGHT DOUBLE-LINED SPECTROSCOPIC BINARIES. V. THE AM STARS HD 434 AND 41 SEXTANTIS

    SciTech Connect (OSTI)

    Fekel, Francis C.; Williamson, Michael H.

    2010-11-15

    We have detected the secondary component in two previously known spectroscopic binaries, HD 434 and 41 Sex, and for the first time determined double-lined orbits for them. Despite the relatively long period of 34.26 days and a moderate eccentricity of 0.32, combined with the components' rotationally broadened lines, measurement of the primary and secondary radial velocities of HD 434 has enabled us to obtain significantly improved orbital elements. While the 41 Sex system has a much shorter period of 6.167 days and a circular orbit, the estimated V mag difference of 3.2 between its components also makes this a challenging system. The new orbital dimensions (a{sub 1} sin i and a{sub 2} sin i) and minimum masses (m{sub 1} sin{sup 3} i and m{sub 2} sin{sup 3} i) of HD 434 have accuracies of 0.8% or better, while the same quantities for 41 Sex are good to 0.5% or better. Both components of HD 434 are Am stars while the Am star primary of 41 Sex has a late-F or early-G companion. All four stars are on the main sequence. The two components of HD 434 are rotating much faster than their predicted pseudosynchronous velocities, while both components of 41 Sex are synchronously rotating. For the primary of 41 Sex, the spectrum line depth changes noted by Sreedhar Rao et al. were not detected.

  13. The HD molecule in small and medium cages of clathrate hydrates: Quantum dynamics studied by neutron scattering measurements and computation

    SciTech Connect (OSTI)

    Colognesi, Daniele; Celli, Milva; Ulivi, Lorenzo; Powers, Anna; Xu, Minzhong; Bačić, Zlatko

    2014-10-07

    We report inelastic neutron scattering (INS) measurements on molecular hydrogen deuteride (HD) trapped in binary cubic (sII) and hexagonal (sH) clathrate hydrates, performed at low temperature using two different neutron spectrometers in order to probe both energy and momentum transfer. The INS spectra of binary clathrate samples exhibit a rich structure containing sharp bands arising from both the rotational transitions and the rattling modes of the guest molecule. For the clathrates with sII structure, there is a very good agreement with the rigorous fully quantum simulations which account for the subtle effects of the anisotropy, angular and radial, of the host cage on the HD microscopic dynamics. The sH clathrate sample presents a much greater challenge, due to the uncertainties regarding the crystal structure, which is known only for similar crystals with different promoter, but nor for HD (or H{sub 2}) plus methyl tert-butyl ether (MTBE-d12)

  14. Separated fringe packet observations with the Chara Array. II. ? Andromeda, HD 178911, and ? Cephei

    SciTech Connect (OSTI)

    Farrington, C. D.; Ten Brummelaar, T. A.; Turner, N. H.; Sturmann, L.; Sturmann, J.; Mason, B. D.; Hartkopf, W. I.; Mourard, D.; Moravveji, E.; McAlister, H. A. E-mail: theo@chara-array.org E-mail: sturmann@chara-array.org E-mail: bdm@usno.navy.mil E-mail: denis.mourard@oca.eu E-mail: hal@chara.gsu.edu

    2014-09-01

    When observed with optical long-baseline interferometers, components of a binary star that are sufficiently separated produce their own interferometric fringe packets; these are referred to as separated fringe packet (SFP) binaries. These SFP binaries can overlap in angular separation with the regime of systems resolvable by speckle interferometry at single, large-aperture telescopes and can provide additional measurements for preliminary orbits lacking good phase coverage, help constrain elements of already established orbits, and locate new binaries in the undersampled regime between the bounds of spectroscopic surveys and speckle interferometry. In this process, a visibility calibration star is not needed, and the SFPs can provide an accurate vector separation. In this paper, we apply the SFP approach to ? Andromeda, HD 178911, and ? Cephei with the CLIMB three-beam combiner at the CHARA Array. For these systems we determine component masses and parallax of 0.963 0.049 M {sub ?} and 0.860 0.051 M {sub ?} and 39.54 1.85 mas for ? Andromeda, for HD 178911 of 0.802 0.055 M {sub ?} and 0.622 0.053 M {sub ?} with 28.26 1.70 mas, and masses of 1.045 0.031 M {sub ?} and 0.408 0.066 M {sub ?} and 38.10 2.81 mas for ? Cephei.

  15. Recent Test Results of the High Field Nb3Sn Dipole Magnet HD2

    SciTech Connect (OSTI)

    Ferracin, P.; Bingham, B.; Caspi, S.; Cheng, D. W.; Dietderich, D. R.; Felice, H.; Hafalia, A. R.; Hannaford, C. R.; Joseph, J.; Lietzke, A. F.; Lizarazo, J.; Sabbi, G.; Wang, X.

    2009-10-19

    The 1 m long Nb{sub 3}Sn dipole magnet HD2, fabricated and tested at Lawrence Berkeley National Laboratory, represents a step towards the development of block-type accelerator quality magnets operating in the range of 13-15 T. The magnet design features two coil modules composed of two layers wound around a titanium-alloy pole. The layer 1 pole includes a round cutout to provide room for a bore tube with a clear aperture of 36 mm. After a first series of tests where HD2 reached a maximum bore field of 13.8 T, corresponding to an estimated peak field on the conductor of 14.5 T, the magnet was disassembled and reloaded without the bore tube and with a clear aperture increased to 43 mm. We describe in this paper the magnet training observed in two consecutive tests after the removal of the bore tube, with a comparison of the quench performance with respect to the previous tests. An analysis of the voltage signals recorded before and after training quenches is then presented and discussed, and the results of coil visual inspections reported.

  16. Asteroseismic analysis of the CoRoT target HD 49933

    SciTech Connect (OSTI)

    Liu, Zhie; Yang, Wuming; Bi, Shaolan; Tian, Zhijia; Liu, Kang; Ge, Zhishuai; Yu, Jie; He, Xin; Wu, Yaqian; Chintarungruangchai, P.; Li, Tanda; Tan, Xiaoyan

    2014-01-10

    The frequency ratios r {sub 10} and r {sub 01} of HD 49933 exhibit an increase at high frequencies. This behavior also exists in the ratios of other stars, which is considered to result from the low signal-to-noise ratio and the larger linewidth at the high-frequency end and could not be predicted by stellar models in previous work. Our calculations show that the behavior not only can be reproduced by stellar models, but can be predicted by asymptotic formulas of the ratios. The frequency ratios of the Sun, too, can be reproduced well by the asymptotic formulas. The increased behavior derives from the fact that the gradient of mean molecular weight at the bottom of the radiative region hinders the propagation of p-modes, while the hindrance does not exist in the convective core. This behavior should exist in the ratios of stars with a large convective core. The characteristic of the ratios at high frequencies provides a strict constraint on stellar models and aids in determining the size of the convective core and the extent of overshooting. Observational constraints point to a star with M = 1.28 0.01 M {sub ?}, R = 1.458 0.005 R {sub ?}, t = 1.83 0.1 Gyr, r{sub cc} = 0.16 0.02 R {sub ?}, ? = 1.85 0.05, and ?{sub ov} =0.6 0.2 for HD 49933.

  17. The curious case of HD 41248. A pair of static signals buried behind red noise

    SciTech Connect (OSTI)

    Jenkins, J. S.; Tuomi, M.

    2014-10-20

    Gaining a better understanding of the effects of stellar-induced radial velocity noise is critical for the future of exoplanet studies since the discovery of the lowest-mass planets using this method will require us to go below the intrinsic stellar noise limit. An interesting test case in this respect is that of the southern solar analog HD 41248. The radial velocity time series of this star has been proposed to contain either a pair of signals with periods of around 18 and 25 days, which could be due to a pair of resonant super-Earths, or a single and varying 25 day signal that could arise due to a complex interplay between differential rotation and modulated activity. In this work, we build up more evidence for the former scenario, showing that the signals are still clearly significant, even after more than 10 yr of observations, and they likely do not change in period, amplitude, or phase as a function of time, the hallmarks of static Doppler signals. We show that over the last two observing seasons, this star was more intrinsically active and the noise reddened, highlighting why better noise models are needed to find the lowest amplitude signals, in particular, models that consider noise correlations. This analysis shows that there is still sufficient evidence for the existence of two super-Earths on the edge of, or locked into, a 7:5 mean motion resonance orbiting HD 41248.

  18. Transit confirmation and improved stellar and planet parameters for the super-Earth HD 97658 b and its host star

    SciTech Connect (OSTI)

    Van Grootel, V.; Gillon, M.; Scuflaire, R.; Valencia, D.; Madhusudhan, N.; Demory, B.-O.; Queloz, D.; Dragomir, D.; Howe, A. R.; Burrows, A. S.; Deming, D.; Ehrenreich, D.; Lovis, C.; Mayor, M.; Pepe, F.; Segransan, D.; Udry, S.; Seager, S.

    2014-05-01

    Super-Earths transiting nearby bright stars are key objects that simultaneously allow for accurate measurements of both their mass and radius, providing essential constraints on their internal composition. We present here the confirmation, based on Spitzer transit observations, that the super-Earth HD 97658 b transits its host star. HD 97658 is a low-mass (M {sub *} = 0.77 0.05 M {sub ?}) K1 dwarf, as determined from the Hipparcos parallax and stellar evolution modeling. To constrain the planet parameters, we carry out Bayesian global analyses of Keck-High Resolution Echelle Spectrometer (Keck-HIRES) radial velocities and Microvariability and Oscillations of STars (MOST) and Spitzer photometry. HD 97658 b is a massive (M{sub P}=7.55{sub ?0.79}{sup +0.83} M{sub ?}) and large (R{sub P}=2.247{sub ?0.095}{sup +0.098}R{sub ?} at 4.5 ?m) super-Earth. We investigate the possible internal compositions for HD 97658 b. Our results indicate a large rocky component, of at least 60% by mass, and very little H-He components, at most 2% by mass. We also discuss how future asteroseismic observations can improve the knowledge of the HD 97658 system, in particular by constraining its age. Orbiting a bright host star, HD 97658 b will be a key target for upcoming space missions such as the Transiting Exoplanet Survey Satellite (TESS), the Characterizing Exoplanet Satellite (CHEOPS), the Planetary Transits and Oscillations of stars (PLATO), and the James Webb Space Telescope to characterize thoroughly its structure and atmosphere.

  19. The corona of HD 189733 and its X-ray activity

    SciTech Connect (OSTI)

    Pillitteri, I.; Wolk, S. J.; Gnther, H. M.; Cohen, O.; Kashyap, V.; Drake, J. J.; Lopez-Santiago, J.; Sciortino, S.

    2014-04-20

    Testing whether close-in massive exoplanets (hot Jupiters) can enhance the stellar activity in their host primary is crucial for the models of stellar and planetary evolution. Among systems with hot Jupiters, HD 189733 is one of the best studied because of its proximity, strong activity, and the presence of a transiting planet, which allows transmission spectroscopy and a measure of the planetary radius and its density. Here we report on the X-ray activity of the primary star, HD 189733 A, using a new XMM-Newton observation and a comparison with the previous X-ray observations. The spectrum in the quiescent intervals is described by two temperatures at 0.2 keV and 0.7 keV, while during the flares a third component at 0.9 keV is detected. With the analysis of the summed Reflection Grating Spectrometer spectra, we obtain estimates of the electron density in the range n{sub e} = (1.6-13) 10{sup 10} cm{sup 3}, and thus the corona of HD 189733 A appears denser than the solar one. For the third time, we observe a large flare that occurred just after the eclipse of the planet. Together with the flares observed in 2009 and 2011, the events are restricted to a small planetary phase range of ? = 0.55-0.65. Although we do not find conclusive evidence of a significant excess of flares after the secondary transits, we suggest that the planet might trigger such flares when it passes close to the locally high magnetic field of the underlying star at particular combinations of stellar rotational phases and orbital planetary phases. For the most recent flares, a wavelet analysis of the light curve suggests a loop of length of four stellar radii at the location of the bright flare, and a local magnetic field of the order of 40-100 G, in agreement with the global field measured in other studies. The loop size suggests an interaction of magnetic nature between planet and star, separated by only ?8R {sub *}. The X-ray variability of HD 189733 A is larger than the variability of field stars and young Pleiades of similar spectral type and X-ray luminosity. We also detect the stellar companion (HD 189733 B, ?12'' from the primary star) in this XMM-Newton observation. Its very low X-ray luminosity (L{sub X} = 3.4 10{sup 26} erg s{sup 1}) confirms the old age of this star and of the binary system. The high activity of the primary star is best explained by a transfer of angular momentum from the planet to the star.

  20. A detailed analysis of the HD 73526 2:1 resonant planetary system

    SciTech Connect (OSTI)

    Wittenmyer, Robert A.; Horner, Jonathan; Tinney, C. G.; Salter, G. S.; Bailey, J.; Wright, D.; Tan, Xianyu; Lee, Man Hoi; Butler, R. P.; Arriagada, P.; Carter, B. D.; Jones, H. R. A.; O'Toole, S. J.; Crane, J. D.; Schectman, S. A.; Thompson, I.; Minniti, D.; Diaz, M.

    2014-01-10

    We present six years of new radial velocity data from the Anglo-Australian and Magellan Telescopes on the HD 73526 2:1 resonant planetary system. We investigate both Keplerian and dynamical (interacting) fits to these data, yielding four possible configurations for the system. The new data now show that both resonance angles are librating, with amplitudes of 40 and 60, respectively. We then perform long-term dynamical stability tests to differentiate these solutions, which only differ significantly in the masses of the planets. We show that while there is no clearly preferred system inclination, the dynamical fit with i = 90 provides the best combination of goodness-of-fit and long-term dynamical stability.

  1. Asymmetric branching of dissociated photofragments of HD{sup +} in an intense femtosecond laser field

    SciTech Connect (OSTI)

    Chatterjee, Souvik; Bhattacharyya, S. S.; Dutta, Bibhas

    2011-06-15

    We have numerically explored the asymmetry in the branching ratio of the photofragments in the photodissociation of HD{sup +} (neutral D and neutral H), leading to the possibility of localization of the electron on a chosen nucleus by careful tuning of the laser parameters. For two different frequencies we show that, starting from an initial stationary wave function, proper tuning of the pulse duration (2{sigma}) and peak intensities (I{sup 0}) of the laser pulses can lead to very different branching ratios of the two reaction channels. The results are interpreted in terms of the propagation of the nonstationary wave packet through regions having dominant radiative or nonradiative interactions at different times. We also investigate what effect the choice of initial vibrational state has on the overall asymmetry in the branching ratio of the dissociation products.

  2. MOST SPACE TELESCOPE PHOTOMETRY OF THE 2010 JANUARY TRANSIT OF EXTRASOLAR PLANET HD80606b

    SciTech Connect (OSTI)

    Roberts, Jessica E.; Barnes, Jason W.; Rowe, Jason F.

    2013-01-01

    We present observations of the full 2010 January transit of HD80606b from the Canadian microsatellite, Microvariability and Oscillations of Stars. By employing a space-based telescope, we monitor the entire transit, thus limiting systematic errors that result from ground observations. We determine measurements for the planetary radius (R{sub p} = 0.987 {+-} 0.061 R {sub Jup}) and inclination (i = 89. Degree-Sign 283 {+-} 0.024) by constraining our fits with the observed parameters of different groups. Our measured mid-transit time of 2455210.6449 {+-} 0.0034 HJD is consistent with the 2010 Spitzer results and is 20 minutes earlier than predicted by groups who observed the 2009 June transit.

  3. AN ENIGMATIC POINT-LIKE FEATURE WITHIN THE HD169142 TRANSITIONAL DISK ,

    SciTech Connect (OSTI)

    Biller, Beth A.; Males, Jared; Morzinski, Katie; Close, Laird M.; Follette, Katherine B.; Hinz, Philip M.; Rodigas, Timothy; Weinberger, Alycia; Juhsz, Attila; Lacour, Sylvestre; Henning, Thomas; Pott, Jrg-Uwe; Khler, Rainer; Bonnefoy, Mickal

    2014-09-01

    We report the detection of a faint point-like feature possibly related to ongoing planet-formation in the disk of the transition disk star HD169142. The point-like feature has a ?mag(L)? 6.4, at a separation of ?0.''11 and position angle ?0. Given its lack of an H or K{sub S} counterpart despite its relative brightness, this candidate cannot be explained by purely photospheric emission and must be a disk feature heated by an as yet unknown source. Its extremely red colors make it highly unlikely to be a background object, but future multi-wavelength follow up is necessary for confirmation and characterization of this feature.

  4. DISCOVERY OF H? EMISSION FROM THE CLOSE COMPANION INSIDE THE GAP OF TRANSITIONAL DISK HD142527

    SciTech Connect (OSTI)

    Close, L. M.; Follette, K. B.; Males, J. R.; Apai, D.; Morzinski, K.; Rodigas, T. J.; Hinz, P.; Bailey, V.; Puglisi, A.; Xompero, M.; Briguglio, R.; Najita, J.; Weinberger, A. J.

    2014-02-01

    We utilized the new high-order 585 actuator Magellan Adaptive Optics system (MagAO) to obtain very high-resolution visible light images of HD142527 with MagAO's VisAO science camera. In the median seeing conditions of the 6.5m Magellan telescope (0.''50.''7), we find MagAO delivers 24%-19% Strehl at H? (0.656 ?m). We detect a faint companion (HD142527B) embedded in this young transitional disk system at just 86.3 1.9 mas (?12 AU) from the star. The companion is detected in both H? and a continuum filter (?mag = 6.33 0.20 mag at H? and 7.50 0.25 mag in the continuum filter). This provides confirmation of the tentative companion discovered by Biller and co-workers with sparse aperture masking at the 8m Very Large Telescope. The H? emission from the ?0.25 solar mass companion (EW = 180 ) implies a mass accretion rate of ?5.9 10{sup 10} M {sub sun} yr{sup 1} and a total accretion luminosity of 1.2% L {sub sun}. Assuming a similar accretion rate, we estimate that a 1 Jupiter mass gas giant could have considerably better (50-1000) planet/star contrasts at H? than at the H band (COND models) for a range of optical extinctions (3.4-0 mag). We suggest that ?0.5-5 M {sub jup} extrasolar planets in their gas accretion phase could be much more luminous at H? than in the NIR. This is the motivation for our new MagAO GAPplanetS survey for extrasolar planets.

  5. HD106906b: A PLANETARY-MASS COMPANION OUTSIDE A MASSIVE DEBRIS DISK

    SciTech Connect (OSTI)

    Bailey, Vanessa; Reiter, Megan; Morzinski, Katie; Males, Jared; Su, Kate Y. L.; Hinz, Philip M.; Stark, Daniel; Close, Laird M.; Follette, Katherine B.; Rodigas, Timothy; Meshkat, Tiffany; Kenworthy, Matthew; Mamajek, Eric; Briguglio, Runa; Puglisi, Alfio; Xompero, Marco; Weinberger, Alycia J.

    2014-01-01

    We report the discovery of a planetary-mass companion, HD106906 b, with the new Magellan Adaptive Optics (MagAO) + Clio2 system. The companion is detected with Clio2 in three bands: J, K{sub S} , and L', and lies at a projected separation of 7.''1 (650 AU). It is confirmed to be comoving with its 13 2 Myr F5 host using Hubble Space Telescope Advanced Camera for Surveys astrometry over a time baseline of 8.3 yr. DUSTY and COND evolutionary models predict that the companion's luminosity corresponds to a mass of 11 2 M {sub Jup}, making it one of the most widely separated planetary-mass companions known. We classify its Magellan/Folded-Port InfraRed Echellette J/H/K spectrum as L2.5 1; the triangular H-band morphology suggests an intermediate surface gravity. HD106906 A, a pre-main-sequence Lower Centaurus Crux member, was initially targeted because it hosts a massive debris disk detected via infrared excess emission in unresolved Spitzer imaging and spectroscopy. The disk emission is best fit by a single component at 95 K, corresponding to an inner edge of 15-20 AU and an outer edge of up to 120 AU. If the companion is on an eccentric (e > 0.65) orbit, it could be interacting with the outer edge of the disk. Close-in, planet-like formation followed by scattering to the current location would likely disrupt the disk and is disfavored. Furthermore, we find no additional companions, though we could detect similar-mass objects at projected separations >35 AU. In situ formation in a binary-star-like process is more probable, although the companion-to-primary mass ratio, at <1%, is unusually small.

  6. Clouds on the hot Jupiter HD189733b: Constraints from the reflection spectrum

    SciTech Connect (OSTI)

    Barstow, J. K.; Aigrain, S.; Irwin, P. G. J.; Hackler, T.; Fletcher, L. N.; Lee, J. M.; Gibson, N. P.

    2014-05-10

    The hot Jupiter HD 189733b is probably the best studied of the known extrasolar planets, with published transit and eclipse spectra covering the near UV to mid-IR range. Recent work on the transmission spectrum has shown clear evidence for the presence of clouds in its atmosphere, which significantly increases the model atmosphere parameter space that must be explored in order to fully characterize this planet. In this work, we apply the NEMESIS atmospheric retrieval code to the recently published HST/STIS reflection spectrum, and also to the dayside thermal emission spectrum in light of new Spitzer/IRAC measurements, as well as our own re-analysis of the HST/NICMOS data. We first use the STIS data to place some constraints on the nature of clouds on HD 189733b and explore solution degeneracy between different cloud properties and the abundance of Na in the atmosphere; as already noted in previous work, absorption due to Na plays a significant role in determining the shape of the reflection spectrum. We then perform a new retrieval of the temperature profile and abundances of H{sub 2}O, CO{sub 2}, CO, and CH{sub 4} from the dayside thermal emission spectrum. Finally, we investigate the effect of including cloud in the model on this retrieval process. We find that the current quality of data does not warrant the extra complexity introduced by including cloud in the model; however, future data are likely to be of sufficient resolution and signal-to-noise that a more complete model, including scattering particles, will be required.

  7. THE CALIFORNIA PLANET SURVEY IV: A PLANET ORBITING THE GIANT STAR HD145934 AND UPDATES TO SEVEN SYSTEMS WITH LONG-PERIOD PLANETS

    SciTech Connect (OSTI)

    Katherina Feng, Y.; Wright, Jason T.; Nelson, Benjamin; Wang, Sharon X.; Ford, Eric B.; Marcy, Geoffrey W.; Isaacson, Howard; Howard, Andrew W.

    2015-02-10

    We present an update to seven stars with long-period planets or planetary candidates using new and archival radial velocities from Keck-HIRES and literature velocities from other telescopes. Our updated analysis better constrains orbital parameters for these planets, four of which are known multi-planet systems. HD24040 b and HD183263 c are super-Jupiters with circular orbits and periods longer than 8yr. We present a previously unseen linear trend in the residuals of HD66428 indicative of an additional planetary companion. We confirm that GJ 849 is a multi-planet system and find a good orbital solution for the c component: it is a 1 M {sub Jup} planet in a 15yr orbit (the longest known for a planet orbiting an M dwarf). We update the HD74156 double-planet system. We also announce the detection of HD145934 b, a 2 M {sub Jup} planet in a 7.5yr orbit around a giant star. Two of our stars, HD187123 and HD217107, at present host the only known examples of systems comprising a hot Jupiter and a planet with a well constrained period greater than 5yr, and with no evidence of giant planets in between. Our enlargement and improvement of long-period planet parameters will aid future analysis of origins, diversity, and evolution of planetary systems.

  8. SU-E-T-74: Commissioning of the Elekta VersaHD Linear Accelerator

    SciTech Connect (OSTI)

    Zhang, Y; Ding, K; Hobbs, R; McNutt, T; Wang, K; Liang, X; Zhu, T

    2014-06-01

    Purpose: To present the commissioning process of recently-released Elekta VersaHD linear accelerator, equipped with Agility 160-leaf multileaf collimator and flattening-filter free (FFF) photon modes. Methods: In addition to routine QA procedures, we adopted an EPID-based method to perform the table rotation and Winston-Lutz tests, and a novel multiradiation isocenter alignment check. The beam data acquired include photon percent-depth dose (PDD) of 6X, 6XFFF, 10X, 10XFFF, and 15X in the field size from 22 to 4040cm{sup 2}, profiles, collimator and phantom scatter factors (Sc and Sp), wedge factor, electron (6, 9, 12, and 15MeV) PDD and profiles, cone and cutout factors, and virtual SSD. Validation measurements were carried out in water tank to evaluate the accuracy of beam modeling by the Pinnacle planning system. End-to-End test and IMRT QA were performed to validate the overall delivery accuracy. A theoretical model has also been used to extract the primary dose ratio and off-axis beam softening effects by fitting photon beam profile measurements. Results: The PDDs of FFF beams with field size 1010cm{sup 2} at 10cm depth, 100cm SSD were intentionally adjusted within 1% of the non-FFF beams. The photon profiles of 3030cm{sup 2} at 10cm depth between non-FFF and FFF beams are very different, OAR(10)=0.74 and 0.63, respectively, for 6XFFF and 10XFFF. The collimator and phantom scatter factors of FFF beam demonstrated smaller variation with field sizes. The EPID-based method demonstrated the maximum deviation between the table rotation axis and radiation isocenter is within 1mm, and the radiation isocenters are within 0.4mm relative to that of 6X. The validation measurement shows less than 2% deviation between the measurement and Pinnacle modeling for most of the test conditions. Conclusion: To the best of our knowledge, this is the first study reporting the Elekta VersaHD commissioning experience, which can be a valuable reference for the radiotherapy community.

  9. Comparative Study of Hybrid Powertrains on Fuel Saving, Emissions, and Component Energy Loss in HD Trucks

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

    Gao, Zhiming; Finney, Charles; Daw, Charles; LaClair, Tim J.; Smith, David

    2014-09-30

    We compared parallel and series hybrid powertrains on fuel economy, component energy loss, and emissions control in Class 8 trucks over both city and highway driving. A comprehensive set of component models describing battery energy, engine fuel efficiency, emissions control, and power demand interactions for heavy duty (HD) hybrids has been integrated with parallel and series hybrid Class 8 trucks in order to identify the technical barriers of these hybrid powertrain technologies. The results show that series hybrid is absolutely negative for fuel economy benefit of long-haul trucks due to an efficiency penalty associated with the dual-step conversions of energymore » (i.e. mechanical to electric to mechanical). The current parallel hybrid technology combined with 50% auxiliary load reduction could elevate 5-7% fuel economy of long-haul trucks, but a profound improvement of long-haul truck fuel economy requires additional innovative technologies for reducing aerodynamic drag and rolling resistance losses. The simulated emissions control indicates that hybrid trucks reduce more CO and HC emissions than conventional trucks. The simulated results further indicate that the catalyzed DPF played an important role in CO oxidations. Limited NH3 emissions could be slipped from the Urea SCR, but the average NH3 emissions are below 20 ppm. Meanwhile our estimations show 1.5-1.9% of equivalent fuel-cost penalty due to urea consumption in the simulated SCR cases.« less

  10. Comparative Study of Hybrid Powertrains on Fuel Saving, Emissions, and Component Energy Loss in HD Trucks

    SciTech Connect (OSTI)

    Gao, Zhiming; Finney, Charles; Daw, Charles; LaClair, Tim J.; Smith, David

    2014-09-30

    We compared parallel and series hybrid powertrains on fuel economy, component energy loss, and emissions control in Class 8 trucks over both city and highway driving. A comprehensive set of component models describing battery energy, engine fuel efficiency, emissions control, and power demand interactions for heavy duty (HD) hybrids has been integrated with parallel and series hybrid Class 8 trucks in order to identify the technical barriers of these hybrid powertrain technologies. The results show that series hybrid is absolutely negative for fuel economy benefit of long-haul trucks due to an efficiency penalty associated with the dual-step conversions of energy (i.e. mechanical to electric to mechanical). The current parallel hybrid technology combined with 50% auxiliary load reduction could elevate 5-7% fuel economy of long-haul trucks, but a profound improvement of long-haul truck fuel economy requires additional innovative technologies for reducing aerodynamic drag and rolling resistance losses. The simulated emissions control indicates that hybrid trucks reduce more CO and HC emissions than conventional trucks. The simulated results further indicate that the catalyzed DPF played an important role in CO oxidations. Limited NH3 emissions could be slipped from the Urea SCR, but the average NH3 emissions are below 20 ppm. Meanwhile our estimations show 1.5-1.9% of equivalent fuel-cost penalty due to urea consumption in the simulated SCR cases.

  11. Powertrain Controls Optimization for HD Hybrid Line Haul Trucks - FY2014 Annual Report

    SciTech Connect (OSTI)

    Smith, David E.

    2014-12-01

    This is a vehicle system level project, encompassing analytical modeling and supervisory controls development as well as experimental verification/validation testing at the component, powertrain, and full vehicle system level. This project supports the goal of petroleum consumption reduction for medium and heavy trucks through the development of advanced hybrid technologies and control systems. VSST has invested previously in R&D to support hybrid energy storage systems (Li-ion plus ultra-caps) for light duty, passenger car applications. This research will be extended to the MD and HD sector where current battery technology is not mature enough to handle the substantial regenerative braking power levels these trucks are capable of producing. With this hybrid energy storage system, substantial gains in overall vehicle efficiency are possible. In addition, advanced combustion technologies, such as RCCI, will be implemented into an advanced hybrid powertrain for a Class 8 line haul application. This powertrain, leveraged from other VSST work (Meritor, a current ORNL/VSST partner), is ideal for taking advantage of the benefits of RCCI operation due to its series hybrid mode of operation. Emissions control is also a focus of this project, especially due to the fact that RCCI creates a low temperature exhaust stream that must addressed.

  12. Comparative Study of Hybrid Powertrains on Fuel Saving, Emissions, and Component Energy Loss in HD Trucks

    SciTech Connect (OSTI)

    Gao, Zhiming; FINNEY, Charles E A; Daw, C Stuart; LaClair, Tim J; Smith, David E

    2014-01-01

    We compared parallel and series hybrid powertrains on fuel economy, component energy loss, and emissions control in Class 8 trucks over both city and highway driving. A comprehensive set of component models describing battery energy, engine fuel efficiency, emissions control, and power demand interactions for heavy duty (HD) hybrids has been integrated with parallel and series hybrid Class 8 trucks in order to identify the technical barriers of these hybrid powertrain technologies. The results show that series hybrid is absolutely negative for fuel economy benefit of long-haul trucks due to an efficiency penalty associated with the dual-step conversions of energy (i.e. mechanical to electric to mechanical). The current parallel hybrid technology combined with 50% auxiliary load reduction could elevate 5-7% fuel economy of long-haul trucks, but a profound improvement of long-haul truck fuel economy requires additional innovative technologies for reducing aerodynamic drag and rolling resistance losses. The simulated emissions control indicates that hybrid trucks reduce more CO and HC emissions than conventional trucks. The simulated results further indicate that the catalyzed DPF played an important role in CO oxidations. Limited NH3 emissions could be slipped from the Urea SCR, but the average NH3 emissions are below 20 ppm. Meanwhile our estimations show 1.5-1.9% of equivalent fuel-cost penalty due to urea consumption in the simulated SCR cases.

  13. Updated Spitzer emission spectroscopy of bright transiting hot Jupiter HD 189733b

    SciTech Connect (OSTI)

    Todorov, Kamen O.; Deming, Drake; Burrows, Adam; Grillmair, Carl J.

    2014-12-01

    We analyze all existing secondary eclipse time series spectroscopy of hot Jupiter HD 189733b acquired with the now defunct Spitzer/Infrared Spectrograph (IRS) instrument. We describe the novel approaches we develop to remove the systematic effects and extract accurate secondary eclipse depths as a function of wavelength in order to construct the emission spectrum of the exoplanet. We compare our results with a previous study by Grillmair et al. that did not examine all data sets available to us. We are able to confirm the detection of a water feature near 6 μm claimed by Grillmair et al. We compare the planetary emission spectrum to three model families—based on isothermal atmosphere, gray atmosphere, and two realizations of the complex radiative transfer model by Burrows et al., adopted in Grillmair et al.'s study. While we are able to reject the simple isothermal and gray models based on the data at the 97% level just from the IRS data, these rejections hinge on eclipses measured within a relatively narrow wavelength range, between 5.5 and 7 μm. This underscores the need for observational studies with broad wavelength coverage and high spectral resolution, in order to obtain robust information on exoplanet atmospheres.

  14. THE TRANSIT INGRESS AND THE TILTED ORBIT OF THE EXTRAORDINARILY ECCENTRIC EXOPLANET HD 80606b

    SciTech Connect (OSTI)

    Winn, Joshua N.; Howard, Andrew W.; Marcy, Geoffrey W.; Johnson, John Asher; Gazak, J. Zachary; Starkey, Donn; Ford, Eric B.; Colon, Knicole D.; Reyes, Francisco; Nortmann, Lisa; Dreizler, Stefan; Odewahn, Stephen; Welsh, William F.; Kadakia, Shimonee; Vanderbei, Robert J.; Adams, Elisabeth R.; Lockhart, Matthew; Crossfield, Ian J.; Valenti, Jeff A.; Dantowitz, Ronald

    2009-10-01

    We present the results of a transcontinental campaign to observe the 2009 June 5 transit of the exoplanet HD 80606b. We report the first detection of the transit ingress, revealing the transit duration to be 11.64 +- 0.25 hr and allowing more robust determinations of the system parameters. Keck spectra obtained at midtransit exhibit an anomalous blueshift, giving definitive evidence that the stellar spin axis and planetary orbital axis are misaligned. The Keck data show that the projected spin-orbit angle lambda is between 32 deg. and 87 deg. with 68.3% confidence and between 14 deg. and 142 deg. with 99.73% confidence. Thus, the orbit of this planet is not only highly eccentric (e = 0.93) but is also tilted away from the equatorial plane of its parent star. A large tilt had been predicted, based on the idea that the planet's eccentric orbit was caused by the Kozai mechanism. Independently of the theory, it is worth noting that all three exoplanetary systems with known spin-orbit misalignments have massive planets on eccentric orbits, suggesting that those systems migrate through a different channel than lower mass planets on circular orbits.

  15. Simulation and control of a HD diesel engine equipped with new EGR technology

    SciTech Connect (OSTI)

    Dekker, H.J.; Sturm, W.L.

    1996-09-01

    A dynamic model of a Heavy Duty (HD) turbocharged and aftercooled diesel engine was developed. The engine was equipped with high pressure diesel injection, a Variable Geometry Turbine (VGT) and an Exhaust Gas Recirculation (EGR) system. This engine was targeted at meeting EURO4 emission requirements. The final emission results were 2.4 g/k Wh NO{sub x} and 0.107 g/kWh particulates for the European 13 mode test. Better than 3.0 g/k Wh NO{sub x} and 0.10 g/k Wh particulates are expected to be characteristic EURO4 emission requirements (approximate year of implementation is 2004). In the design of the EGR system the model provided initial assessments of the properties of this system. Associated engine and turbocharger behavior as well as optimal control strategies were predicted. A transient engine control algorithm was developed using the dynamic engine model. The VGT is closed loop controlled and EGR is shut off during a short time after a load increase. The simulation results were confirmed by actual measurements, demonstrating acceptable transient behavior.

  16. Revealing asymmetries in the HD 181327 debris disk: A recent massive collision or interstellar medium warping

    SciTech Connect (OSTI)

    Stark, Christopher C.; Kuchner, Marc J.; Schneider, Glenn; Weinberger, Alycia J.; Debes, John H.; Grady, Carol A.; Jang-Condell, Hannah

    2014-07-01

    New multi-roll coronagraphic images of the HD 181327 debris disk obtained using the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope reveal the debris ring in its entirety at high signal-to-noise ratio and unprecedented spatial resolution. We present and apply a new multi-roll image processing routine to identify and further remove quasi-static point-spread function-subtraction residuals and quantify systematic uncertainties. We also use a new iterative image deprojection technique to constrain the true disk geometry and aggressively remove any surface brightness asymmetries that can be explained without invoking dust density enhancements/deficits. The measured empirical scattering phase function for the disk is more forward scattering than previously thought and is not well-fit by a Henyey-Greenstein function. The empirical scattering phase function varies with stellocentric distance, consistent with the expected radiation pressured-induced size segregation exterior to the belt. Within the belt, the empirical scattering phase function contradicts unperturbed debris ring models, suggesting the presence of an unseen planet. The radial profile of the flux density is degenerate with a radially varying scattering phase function; therefore estimates of the ring's true width and edge slope may be highly uncertain. We detect large scale asymmetries in the disk, consistent with either the recent catastrophic disruption of a body with mass >1% the mass of Pluto, or disk warping due to strong interactions with the interstellar medium.

  17. IMPROVED Ti II log(gf) VALUES AND ABUNDANCE DETERMINATIONS IN THE PHOTOSPHERES OF THE SUN AND METAL-POOR STAR HD 84937

    SciTech Connect (OSTI)

    Wood, M. P.; Lawler, J. E.; Sneden, C.; Cowan, J. J. E-mail: jelawler@wisc.edu E-mail: cowan@nhn.ou.edu

    2013-10-01

    Atomic transition probability measurements for 364 lines of Ti II in the UV through near-IR are reported. Branching fractions from data recorded using a Fourier transform spectrometer (FTS) and a new echelle spectrometer are combined with published radiative lifetimes to determine these transition probabilities. The new results are in generally good agreement with previously reported FTS measurements. Use of the new echelle spectrometer, independent radiometric calibration methods, and independent data analysis routines enables a reduction of systematic errors and overall improvement in transition probability accuracy over previous measurements. The new Ti II data are applied to high-resolution visible and UV spectra of the Sun and metal-poor star HD 84937 to derive new, more accurate Ti abundances. Lines covering a range of wavelength and excitation potential are used to search for non-LTE effects. The Ti abundances derived using Ti II for these two stars match those derived using Ti I and support the relative Ti/Fe abundance ratio versus metallicity seen in previous studies.

  18. Modeling self-subtraction in angular differential imaging: Application to the HD 32297 debris disk

    SciTech Connect (OSTI)

    Esposito, Thomas M.; Fitzgerald, Michael P.; Graham, James R.; Kalas, Paul

    2014-01-01

    We present a new technique for forward-modeling self-subtraction of spatially extended emission in observations processed with angular differential imaging (ADI) algorithms. High-contrast direct imaging of circumstellar disks is limited by quasi-static speckle noise, and ADI is commonly used to suppress those speckles. However, the application of ADI can result in self-subtraction of the disk signal due to the disk's finite spatial extent. This signal attenuation varies with radial separation and biases measurements of the disk's surface brightness, thereby compromising inferences regarding the physical processes responsible for the dust distribution. To compensate for this attenuation, we forward model the disk structure and compute the form of the self-subtraction function at each separation. As a proof of concept, we apply our method to 1.6 and 2.2 ?m Keck adaptive optics NIRC2 scattered-light observations of the HD 32297 debris disk reduced using a variant of the 'locally optimized combination of images' algorithm. We are able to recover disk surface brightness that was otherwise lost to self-subtraction and produce simplified models of the brightness distribution as it appears with and without self-subtraction. From the latter models, we extract radial profiles for the disk's brightness, width, midplane position, and color that are unbiased by self-subtraction. Our analysis of these measurements indicates a break in the brightness profile power law at r ? 110 AU and a disk width that increases with separation from the star. We also verify disk curvature that displaces the midplane by up to 30 AU toward the northwest relative to a straight fiducial midplane.

  19. SPIRAL ARMS IN THE DISK OF HD 142527 FROM CO EMISSION LINES WITH ALMA

    SciTech Connect (OSTI)

    Christiaens, V.; Casassus, S.; Perez, S.; Van der Plas, G.; Mnard, F.

    2014-04-10

    In view of both the size of its gap and the previously reported asymmetries and near-infrared spiral arms, the transition disk of the Herbig Fe star HD 142527 constitutes a remarkable case study. This paper focuses on the morphology of the outer disk through ALMA observations of {sup 12}CO J = 2-1, {sup 12}CO J = 3-2, and {sup 13}CO J = 2-1. Both {sup 12}CO J = 2-1 and {sup 12}CO J = 3-2 show spiral features of different sizes. The innermost spiral arm (S1) is a radio counterpart of the first near-infrared spiral observed by Fukagawa, but it is shifted radially outward. However, the most conspicuous CO spiral arm (S2) lies at the outskirts of the disk and has not been detected before. It corresponds to a cold density structure, with both brightness and excitation temperatures of order 132 K and conspicuous in the {sup 12}CO J = 2-1 peak-intensity map, but faint in {sup 12}CO J = 3-2. There is also a faint counterarm (S3), at a point-symmetric location of S2 with respect to the star. These three spirals are modeled separately with two different formulae that approximate the loci of density maxima in acoustic waves due to embedded planets. S1 could be fit relatively well with these formulae, compared to S2 and S3. Alternative scenarios such as gravitational instability or external tidal interaction are discussed. The impact of channelization on spectrally and spatially resolved peak intensity maps is also briefly addressed.

  20. Hubble space telescope near-ir transmission spectroscopy of the super-Earth HD 97658B

    SciTech Connect (OSTI)

    Knutson, Heather A.; Dragomir, Diana; Kreidberg, Laura; Bean, Jacob L.; Kempton, Eliza M.-R.; McCullough, P. R.; Fortney, Jonathan J.; Gillon, Michael; Homeier, Derek; Howard, Andrew W.

    2014-10-20

    Recent results from the Kepler mission indicate that super-Earths (planets with masses between 1-10 times that of the Earth) are the most common kind of planet around nearby Sun-like stars. These planets have no direct solar system analogue, and are currently one of the least well-understood classes of extrasolar planets. Many super-Earths have average densities that are consistent with a broad range of bulk compositions, including both water-dominated worlds and rocky planets covered by a thick hydrogen and helium atmosphere. Measurements of the transmission spectra of these planets offer the opportunity to resolve this degeneracy by directly constraining the scale heights and corresponding mean molecular weights of their atmospheres. We present Hubble Space Telescope near-infrared spectroscopy of two transits of the newly discovered transiting super-Earth HD 97658b. We use the Wide Field Camera 3's (WFC3) scanning mode to measure the wavelength-dependent transit depth in 30 individual bandpasses. Our averaged differential transmission spectrum has a median 1? uncertainty of 23 ppm in individual bins, making this the most precise observation of an exoplanetary transmission spectrum obtained with WFC3 to date. Our data are inconsistent with a cloud-free solar metallicity atmosphere at the 10? level. They are consistent at the 0.4? level with a flat line model, as well as effectively flat models corresponding to a metal-rich atmosphere or a solar metallicity atmosphere with a cloud or haze layer located at pressures of 10 mbar or higher.

  1. IMPROVED log(gf) VALUES FOR LINES OF Ti I AND ABUNDANCE DETERMINATIONS IN THE PHOTOSPHERES OF THE SUN AND METAL-POOR STAR HD 84937 (ACCURATE TRANSITION PROBABILITIES FOR Ti I)

    SciTech Connect (OSTI)

    Lawler, J. E.; Guzman, A.; Wood, M. P.; Sneden, C.; Cowan, J. J. E-mail: adrianaguzman2014@u.northwestern.edu E-mail: chris@verdi.as.utexas.edu

    2013-04-01

    New atomic transition probability measurements for 948 lines of Ti I are reported. Branching fractions from Fourier transform spectra and from spectra recorded using a 3 m echelle spectrometer are combined with published radiative lifetimes from laser-induced fluorescence measurements to determine these transition probabilities. Generally good agreement is found in comparisons to the NIST Atomic Spectra Database. The new Ti I data are applied to re-determine the Ti abundance in the photospheres of the Sun and metal-poor star HD 84937 using many lines covering a range of wavelength and excitation potential to explore possible non-local thermal equilibrium effects. The variation of relative Ti/Fe abundance with metallicity in metal-poor stars observed in earlier studies is supported in this study.

  2. Constraining the atmospheric composition of the day-night terminators of HD 189733b: Atmospheric retrieval with aerosols

    SciTech Connect (OSTI)

    Lee, Jae-Min; Irwin, Patrick G. J.; Fletcher, Leigh N.; Barstow, Joanna K.; Heng, Kevin

    2014-07-01

    A number of observations have shown that Rayleigh scattering by aerosols dominates the transmission spectrum of HD 189733b at wavelengths shortward of 1 ?m. In this study, we retrieve a range of aerosol distributions consistent with transmission spectroscopy between 0.3-24 ?m that were recently re-analyzed by Pont et al. To constrain the particle size and the optical depth of the aerosol layer, we investigate the degeneracies between aerosol composition, temperature, planetary radius, and molecular abundances that prevent unique solutions for transit spectroscopy. Assuming that the aerosol is composed of MgSiO{sub 3}, we suggest that a vertically uniform aerosol layer over all pressures with a monodisperse particle size smaller than about 0.1 ?m and an optical depth in the range 0.002-0.02 at 1 ?m provides statistically meaningful solutions for the day/night terminator regions of HD 189733b. Generally, we find that a uniform aerosol layer provide adequate fits to the data if the optical depth is less than 0.1 and the particle size is smaller than 0.1 ?m, irrespective of the atmospheric temperature, planetary radius, aerosol composition, and gaseous molecules. Strong constraints on the aerosol properties are provided by spectra at wavelengths shortward of 1 ?m as well as longward of 8 ?m, if the aerosol material has absorption features in this region. We show that these are the optimal wavelengths for quantifying the effects of aerosols, which may guide the design of future space observations. The present investigation indicates that the current data offer sufficient information to constrain some of the aerosol properties of HD189733b, but the chemistry in the terminator regions remains uncertain.

  3. On the detection of molecules in the atmosphere of HD 189733b using HST NICMOS transmission spectroscopy

    SciTech Connect (OSTI)

    Swain, Mark R.; Deroo, Pieter; Line, Michael R.

    2014-04-01

    The Hubble Space Telescope/NICMOS transmission spectrum measurements of HD 189733b that suggest the detection of methane (CH{sub 4}) in an exoplanet atmosphere have been a source of significant controversy. With what is probably the best analyzed exoplanet spectroscopy data set to date, different teams, using different methods, have claimed evidence both contradicting and supporting the original findings. Here, we report results from a uniform spectral retrieval analysis of the three independent published spectra together with null hypothesis testing. Based on Bayesian model comparison, we find that two of the three spectra show strong evidence (≥3.6σ) for the detection of molecular features mainly due to water and methane while the third is consistent with a weak molecular detection at the 2.2σ level. We interpret the agreement in the spectral modulation established by previous authors and the atmospheric retrieval results presented here, as a confirmation of the original detection of molecular absorbers in the atmosphere of HD 189733b.

  4. RECOVERY OF THE CANDIDATE PROTOPLANET HD 100546 b WITH GEMINI/NICI AND DETECTION OF ADDITIONAL (PLANET-INDUCED?) DISK STRUCTURE AT SMALL SEPARATIONS

    SciTech Connect (OSTI)

    Currie, Thayne; Kudo, Tomoyuki [NAOJ, Subaru Telescope, 650N' Aohoku Pl., Hilo, HI 96720 (United States); Muto, Takayuki [Division of Liberal Arts, Kogashin University, 1-24-2, Nishi-Shinjuku, Shinijuku-ku, Tokyo 163-8677 (Japan); Honda, Mitsuhiko [Department of Mathematics and Physics, Kanagawa University, 2946 Tsuchiya, Hiratsuka 259-1293 (Japan); Brandt, Timothy D. [Astrophysics Department, Institute for Advanced Study, Princeton, NJ 08540 (United States); Grady, Carol [Eureka Scientific, 2452 Delmer, Suite 100, Oakland, CA96002 (United States); Fukagawa, Misato [Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043 (Japan); Burrows, Adam [Department of Astrophysical Sciences, Princeton University, 7 Ivy Lane, Princeton, NJ 08544-1001 (United States); Janson, Markus [Stockholm University, SE-106 91 Stockholm (Sweden); Kuzuhara, Masayuki [Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551 (Japan); McElwain, Michael W. [Exoplanets and Stellar Astrophysics Laboratory, Code 667, Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Follette, Katherine [Department of Astronomy, Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065 (United States); Hashimoto, Jun [H. L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440W. Brooks St Norman, OK 73019 (United States); Henning, Thomas [Max Planck Institute for Astronomy, Knigstuhl 17, D-69117 Heidelberg (Germany); Kandori, Ryo; Kusakabe, Nobuhiko; Morino, Jun-ichi; Nishikawa, Jun [National Astronomical Observatory of Japan, 2-21-1, Osawa, Mitaka, Tokyo 181-8588 (Japan); Kwon, Jungmi; Mede, Kyle, E-mail: currie@naoj.org [Department of Astronomy, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan); and others

    2014-12-01

    We report the first independent, second epoch (re-)detection of a directly imaged protoplanet candidate. Using L' high-contrast imaging of HD 100546 taken with the Near-Infrared Coronagraph and Imager on Gemini South, we recover ''HD 100546 b'' with a position and brightness consistent with the original Very Large Telescope/NAos-COnica detection from Quanz etal., although data obtained after 2013 will be required to decisively demonstrate common proper motion. HD 100546 b may be spatially resolved, up to ?12-13 AU in diameter, and is embedded in a finger of thermal IR-bright, polarized emission extending inward to at least 0.''3. Standard hot-start models imply a mass of ?15 M{sub J} . However, if HD 100546 b is newly formed or made visible by a circumplanetary disk, both of which are plausible, its mass is significantly lower (e.g., 1-7 M{sub J} ). Additionally, we discover a thermal IR-bright disk feature, possibly a spiral density wave, at roughly the same angular separation as HD 100546 b but 90 away. Our interpretation of this feature as a spiral arm is not decisive, but modeling analyses using spiral density wave theory implies a wave launching point exterior to ?0.''45 embedded within the visible disk structure: plausibly evidence for a second, hitherto unseen, wide-separation planet. With one confirmed protoplanet candidate and evidence for one to two others, HD 100546 is an important evolutionary precursor to intermediate-mass stars with multiple super-Jovian planets at moderate/wide separations like HR 8799.

  5. Ab Initio Many-Body Calculations of the 3H(d, n)4He and 3He(d, p)4He Fusion

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | SciTech Connect Many-Body Calculations of the 3H(d, n)4He and 3He(d, p)4He Fusion Citation Details In-Document Search Title: Ab Initio Many-Body Calculations of the 3H(d, n)4He and 3He(d, p)4He Fusion Authors: Navratil, P ; Quaglioni, S Publication Date: 2011-09-22 OSTI Identifier: 1248285 Report Number(s): LLNL-JRNL-501012 DOE Contract Number: AC52-07NA27344 Resource Type: Journal Article Resource Relation: Journal Name: Physical Review Letters, vol. 108, na, January 24,

  6. Study of reactive collisions between electrons and molecular cations using multichannel quantum defect theory: Application to HD{sup +} and BeH{sup +}

    SciTech Connect (OSTI)

    Pop, N. Ilie, S.; Motapon, O.; Epée, M. D. Epée; Niyonzima, S.; Mezei, J. Zs.; Chakrabarti, K.; Schneider, I. F.

    2014-11-24

    The present work is aimed at performing the computation of cross sections and Maxwell rate coefficients in the framework of the stepwise version of the Multichannel Quantum Defect Theory (MQDT). Cross sections and rate coefficients suitable for the modelling of the kinetics of HD{sup +} and BeH{sup +} in fusion plasmas and in the stellar atmospheres are presented and discussed. A very good agreement is found between our results for rotational transitions for HD{sup +} and other computations, as well as with experiment.

  7. Exploring atmospheres of hot mini-Neptune and extrasolar giant planets orbiting different stars with application to HD 97658b, WASP-12b, CoRoT-2b, XO-1b, and HD 189733b

    SciTech Connect (OSTI)

    Miguel, Y.; Kaltenegger, L.

    2014-01-10

    We calculated an atmospheric grid for hot mini-Neptune and giant exoplanets that links astrophysical observable parametersorbital distance and stellar typewith the chemical atmospheric species expected. The grid can be applied to current and future observations to characterize exoplanet atmospheres and serves as a reference to interpret atmospheric retrieval analysis results. To build the grid, we developed a one-dimensional code for calculating the atmospheric thermal structure and linked it to a photochemical model that includes disequilibrium chemistry (molecular diffusion, vertical mixing, and photochemistry). We compare the thermal profiles and atmospheric composition of planets at different semimajor axes (0.01 AU ? a ? 0.1 AU) orbiting F, G, K, and M stars. Temperature and UV flux affect chemical species in the atmosphere. We explore which effects are due to temperature and which are due to stellar characteristics, showing the species most affected in each case. CH{sub 4} and H{sub 2}O are the most sensitive to UV flux, H displaces H{sub 2} as the most abundant gas in the upper atmosphere for planets receiving a high UV flux. CH{sub 4} is more abundant for cooler planets. We explore vertical mixing, to inform degeneracies on our models and in the resulting spectral observables. For lower pressures, observable species like H{sub 2}O or CO{sub 2} can indicate the efficiency of vertical mixing, with larger mixing ratios for a stronger mixing. By establishing the grid, testing the sensitivity of the results, and comparing our model to published results, our paper provides a tool to estimate what observations could yield. We apply our model to WASP-12b, CoRoT-2b, XO-1b, HD189733b, and HD97658b.

  8. Charge asymmetry in rovibrationally excited HD{sup +} determined using explicitly correlated all-particle Gaussian functions

    SciTech Connect (OSTI)

    Kirnosov, Nikita; Sharkey, Keeper L.; Adamowicz, Ludwik; Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721

    2013-11-28

    Very accurate non-Born-Oppenheimer quantum-mechanical calculations are performed to determine the average values of the interparticle distances and the proton-deuteron density function for the rovibrationally excited HD{sup +} ion. The states corresponding to excitations to all bound vibrational states (v = 0, , 22) and simultaneously excited to the first excited rotational state (N = 1) are considered. To describe each state up to 8000 explicitly correlated all-particle Gaussian functions are used. The nonlinear parameters of the Gaussians are variationally optimized using a procedure that employs the analytical energy gradient determined with respect to these parameters. The results show an increasing asymmetry in the electron distribution with the vibrational excitation as the electron density shifts towards deuteron and away from the proton.

  9. MID-INFRARED HIGH-CONTRAST IMAGING OF HD 114174 B: AN APPARENT AGE DISCREPANCY IN A ''SIRIUS-LIKE'' BINARY SYSTEM

    SciTech Connect (OSTI)

    Matthews, Christopher T.; Crepp, Justin R.; Skemer, Andrew; Hinz, Philip M.; Bailey, Vanessa P.; Defrere, Denis; Leisenring, Jarron; Gianninas, Alexandros; Kilic, Mukremin; Skrutskie, Michael; Esposito, Simone; Puglisi, Alfio

    2014-03-10

    We present new observations of the faint ''Sirius-like'' companion discovered to orbit HD 114174. Previous attempts to image HD 114174 B at mid-infrared wavelengths using NIRC2 at Keck have resulted in a non-detection. Our new L'-band observations taken with the Large Binocular Telescope and L/M-band InfraRed Camera recover the companion (?L = 10.15 0.15mag, ? = 0.''675 0.''016) with a high signal-to-noise ratio (10?). This measurement represents the deepest L' high-contrast imaging detection at subarcsecond separations to date, including extrasolar planets. We confirm that HD 114174 B has near-infrared colors consistent with the interpretation of a cool white dwarf (WD; J L' = 0.76 0.19mag, K L' = 0.64 0.20). New model fits to the object's spectral energy distribution indicate a temperature T {sub eff} = 4260 360K, surface gravity log g = 7.94 0.03, a cooling age t{sub c} ? 7.8Gyr, and mass M = 0.54 0.01 M {sub ?}. We find that the cooling ages given by theoretical atmospheric models do not agree with the age of HD 114174 A derived from both isochronological and gyrochronological analyses. We speculate on possible scenarios to explain the apparent age discrepancy between the primary and secondary. HD114174B is a nearby benchmark WD that will ultimately enable a dynamical mass estimate through continued Doppler and astrometric monitoring. Efforts to characterize its physical properties in detail will test theoretical atmospheric models and improve our understanding of WD evolution, cooling, and progenitor masses.

  10. Natural Gas as a Future Fuel for Heavy-Duty Vehicles

    SciTech Connect (OSTI)

    Wai-Lin Litzke; James Wegrzyn

    2001-05-14

    In addition to their significant environmental impacts, medium-duty and heavy-duty (HD) vehicles are high volume fuel users. Development of such vehicles, which include transit buses, refuse trucks, and HD Class 6-8 trucks, that are fueled with natural gas is strategic to market introduction of natural gas vehicles (NGV). Over the past five years the Department of Energy's (DOE) Office of Heavy Vehicle Technologies (OHVT) has funded technological developments in NGV systems to support the growth of this sector in the highly competitive transportation market. The goals are to minimize emissions associated with NGV use, to improve on the economies of scale, and to continue supporting the testing and safety assessments of all new systems. This paper provides an overview of the status of major projects under a program supported by DOE/OHVT and managed by Brookhaven National Laboratory. The discussion focuses on the program's technical strategy in meeting specific goals proposed by the N GV industry and the government. Relevant projects include the development of low-cost fuel storage, fueling infrastructure, and HD vehicle applications.

  11. THE DEEP BLUE COLOR OF HD 189733b: ALBEDO MEASUREMENTS WITH HUBBLE SPACE TELESCOPE/SPACE TELESCOPE IMAGING SPECTROGRAPH AT VISIBLE WAVELENGTHS

    SciTech Connect (OSTI)

    Evans, Thomas M.; Aigrain, Suzanne; Barstow, Joanna K.; Pont, Frederic; Sing, David K.; Desert, Jean-Michel; Knutson, Heather A.; Gibson, Neale; Heng, Kevin; Lecavelier des Etangs, Alain

    2013-08-01

    We present a secondary eclipse observation for the hot Jupiter HD 189733b across the wavelength range 290-570 nm made using the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. We measure geometric albedos of A{sub g} = 0.40 {+-} 0.12 across 290-450 nm and A{sub g} < 0.12 across 450-570 nm at 1{sigma} confidence. The albedo decrease toward longer wavelengths is also apparent when using six wavelength bins over the same wavelength range. This can be interpreted as evidence for optically thick reflective clouds on the dayside hemisphere with sodium absorption suppressing the scattered light signal beyond {approx}450 nm. Our best-fit albedo values imply that HD 189733b would appear a deep blue color at visible wavelengths.

  12. RETIRED A STARS AND THEIR COMPANIONS. VI. A PAIR OF INTERACTING EXOPLANET PAIRS AROUND THE SUBGIANTS 24 SEXTANIS AND HD 200964

    SciTech Connect (OSTI)

    Johnson, John Asher; Payne, Matthew; Ford, Eric B.; Howard, Andrew W.; Marcy, Geoffrey W.; Clubb, Kelsey I.; Bowler, Brendan P.; Henry, Gregory W.; Fischer, Debra A.; Brewer, John M.; Schwab, Christian; Reffert, Sabine; Lowe, Thomas B.

    2011-01-15

    We report radial velocity (RV) measurements of the G-type subgiants 24 Sextanis (= HD 90043) and HD 200964. Both are massive, evolved stars that exhibit periodic variations due to the presence of a pair of Jovian planets. Photometric monitoring with the T12 0.80 m APT at Fairborn Observatory demonstrates both stars to be constant in brightness to {<=}0.002 mag, thus strengthening the planetary interpretation of the RV variations. Based on our dynamical analysis of the RV time series, 24 Sex b, c have orbital periods of 452.8 days and 883.0 days, corresponding to semimajor axes 1.333 AU and 2.08 AU, and minimum masses 1.99 M{sub Jup} and 0.86 M{sub Jup}, assuming a stellar mass M{sub *}= 1.54 M{sub sun}. HD 200964 b, c have orbital periods of 613.8 days and 825.0 days, corresponding to semimajor axes 1.601 AU and 1.95 AU, and minimum masses 1.99 M{sub Jup} and 0.90 M{sub Jup}, assuming M{sub *}= 1.44 M{sub sun}. We also carry out dynamical simulations to properly account for gravitational interactions between the planets. Most, if not all, of the dynamically stable solutions include crossing orbits, suggesting that each system is locked in a mean-motion resonance that prevents close encounters and provides long-term stability. The planets in the 24 Sex system likely have a period ratio near 2:1, while the HD 200964 system is even more tightly packed with a period ratio close to 4:3. However, we caution that further RV observations and more detailed dynamical modeling will be required to provide definitive and unique orbital solutions for both cases, and to determine whether the two systems are truly resonant.

  13. Toxicology Studies on Lewisite and Sulfur Mustard Agents: Subchronic Toxicity of Sulfur Mustard (HD) In Rats Final Report

    SciTech Connect (OSTI)

    Sasser, L. B.; Miller, R. A.; Kalkwarf, D, R.; Buschbom, R. L.; Cushing, J. A.

    1989-06-30

    Occupational health standards have not been established for sulfur mustard [bis(2- chlorethyl)-sulfide], a strong alkylating agent with known mutagenic properties. Seventytwo Sprague-Dawley rats of each sex, 6-7 weeks old, were divided into six groups (12/group/ sex) and gavaged with either 0, 0.003 , 0.01 , 0.03 , 0.1 or 0.3 mg/kg of sulfur mustard in sesame oil 5 days/week for 13 weeks. No dose-related mortality was observed. A significant decrease (P ( 0.05) in body weight was observed in both sexes of rats only in the 0.3 mg/kg group. Hematological evaluations and clinical chemistry measurements found no consistent treatment-related effects at the doses studied. The only treatment-related lesion associated with gavage exposure upon histopathologic evaluation was epithelial hyperplasia of the forestomach of both sexes at 0.3 mg/kg and males at 0.1 mg/kg. The hyperplastic change was minimal and characterized by cellular disorganization of the basilar layer, an apparent increase in mitotic activity of the basilar epithelial cells, and thickening of the epithelial layer due to the apparent increase in cellularity. The estimated NOEL for HD in this 90-day study is 0.1 mg/kg/day when administered orally.

  14. Boosting Deuteron Polarization in HD Targets: Experience of moving spins between H and D with RF methods during the E06-101 experiment at Jefferson Lab

    SciTech Connect (OSTI)

    Wei, Xiangdong; Bass, Christopher; D'Angelo, Annalisa; Deur, Alexandre; Dezern, Gary; Kageya, Tsuneo; Laine, Vivien; Lowry, Michael; Sandorfi, Andrew; Teachey, Robert; Wang, Haipeng; Whisnant, Charles

    2014-06-01

    Solid HDice targets are polarized by bringing the HD crystal to thermal equilibrium at low temperature and high magnetic field, typically 10-20 mK and 15 Tesla, at Jefferson Lab. In this regime, due to its smaller magnetic moment, the resulting polarization for D is always at least three times smaller than for H. The controlled amount of polarizing catalysts, o-H2 and p-D2, used in the process of reaching a frozen-spin state, further limit the maximum achievable D polarization. Nonetheless, H and D polarizations can be transferred from one to the other by connecting the H and D sub-states of the HD system with RF. In a large target, the RF power needed for such transitions is effectively limited by non-uniformities in the RF field. High efficiency transfers can require substantial RF power levels, and a tuned-RF circuit is needed to prevent large temperature excursions of the holding cryostat. In this paper, we compare the advantages and limitations of two different RF transfer methods to increase D polarization, Forbidden Adiabatic and Saturated Forbidden RF Transitions. The experience with the HD targets used during the recently completed E06-101 experiment in Hall-B of Jefferson Lab is discussed.

  15. Temperature-dependent kinetic measurements and quasi-classical trajectory studies for the OH{sup +} + H{sub 2}/D{sub 2} → H{sub 2}O{sup +}/HDO{sup +} + H/D reactions

    SciTech Connect (OSTI)

    Martinez, Oscar; Ard, Shaun G.; Shuman, Nicholas S.; Viggiano, Albert A. E-mail: afrl.rvborgmailbox@kirtland.af.mil; Li, Anyang; Guo, Hua E-mail: afrl.rvborgmailbox@kirtland.af.mil

    2015-09-21

    We have measured the temperature-dependent kinetics for the reactions of OH{sup +} with H{sub 2} and D{sub 2} using a selected ion flow tube apparatus. Reaction occurs via atom abstraction to result in H{sub 2}O{sup +}/HDO{sup +} + H/D. Room temperature rate coefficients are in agreement with prior measurements and resulting temperature dependences are T{sup 0.11} for the hydrogen and T{sup 0.25} for the deuterated reactions. This work is prompted in part by recent theoretical work that mapped a full-dimensional global potential energy surface of H{sub 3}O{sup +} for the OH{sup +} + H{sub 2} → H + H{sub 2}O{sup +} reaction [A. Li and H. Guo, J. Phys. Chem. A 118, 11168 (2014)], and reported results of quasi-classical trajectory calculations, which are extended to a wider temperature range and initial rotational state specification here. Our experimental results are in excellent agreement with these calculations which accurately predict the isotope effect in addition to an enhancement of the reaction rate constant due to the molecular rotation of OH{sup +}. The title reaction is of high importance to astrophysical models, and the temperature dependence of the rate coefficients determined here should now allow for better understanding of this reaction at temperatures more relevant to the interstellar medium.

  16. HD/H{sub 2} AS A PROBE OF THE ROLES OF GAS, DUST, LIGHT, METALLICITY, AND COSMIC RAYS IN PROMOTING THE GROWTH OF MOLECULAR HYDROGEN IN THE DIFFUSE INTERSTELLAR MEDIUM

    SciTech Connect (OSTI)

    Liszt, H. S.

    2015-01-20

    We modeled recent observations of UV absorption of HD and H{sub 2} in the Milky Way and toward damped/subdamped Lyα systems at z = 0.18 and z >1.7. N(HD)/N(H{sub 2}) ratios reflect the separate self-shieldings of HD and H{sub 2} and the coupling introduced by deuteration chemistry. Locally, observations are explained by diffuse molecular gas with 16 cm{sup –3} ≲ n(H) ≲ 128 cm{sup –3} if the cosmic-ray ionization rate per H nucleus ζ {sub H} =2 × 10{sup –16} s{sup –1}, as inferred from H{sub 3} {sup +} and OH{sup +}. The dominant influence on N(HD)/N(H{sub 2}) is the cosmic-ray ionization rate with a much weaker downward dependence on n(H) at solar metallicity, but dust extinction can drive N(HD) higher as with N(H{sub 2}). At z > 1.7, N(HD) is comparable to the Galaxy but with 10 times smaller N(H{sub 2}) and somewhat smaller N(H{sub 2})/N(H I). Comparison of our Galaxy with the Magellanic Clouds shows that smaller H{sub 2}/H is expected at subsolar metallicity, and we show by modeling that HD/H{sub 2} increases with density at low metallicity, opposite to the Milky Way. Observations of HD would be explained with higher n(H) at low metallicity, but high-z systems have high HD/H{sub 2} at metallicity 0.04 ≲ Z ≲ 2 solar. In parallel, we trace dust extinction and self-shielding effects. The abrupt H{sub 2} transition to H{sub 2}/H ≈ 1%-10% occurs mostly from self-shielding, although it is assisted by extinction for n(H) ≲ 16 cm{sup –3}. Interior H{sub 2} fractions are substantially increased by dust extinction below ≲ 32 cm{sup –3}. At smaller n(H), ζ {sub H}, small increases in H{sub 2} triggered by dust extinction can trigger abrupt increases in N(HD)

  17. LARGE-SCALE PERIODIC VARIABILITY OF THE WIND OF THE WOLF-RAYET STAR WR 1 (HD 4004)

    SciTech Connect (OSTI)

    Chene, A.-N.

    2010-06-20

    We present the results of an intensive photometric and spectroscopic monitoring campaign of the WN4 Wolf-Rayet (WR) star WR 1 = HD 4004. Our broadband V photometry covering a timespan of 91 days shows variability with a period of P = 16.9{sup +0.6}{sub -0.3} days. The same period is also found in our spectral data. The light curve is non-sinusoidal with hints of a gradual change in its shape as a function of time. The photometric variations nevertheless remain coherent over several cycles and we estimate that the coherence timescale of the light curve is of the order of 60 days. The spectroscopy shows large-scale line-profile variability which can be interpreted as excess emission peaks moving from one side of the profile to the other on a timescale of several days. Although we cannot unequivocally exclude the unlikely possibility that WR 1 is a binary, we propose that the nature of the variability we have found strongly suggests that it is due to the presence in the wind of the WR star of large-scale structures, most likely corotating interaction regions (CIRs), which are predicted to arise in inherently unstable radiatively driven winds when they are perturbed at their base. We also suggest that variability observed in WR 6, WR 134, and WR 137 is of the same nature. Finally, assuming that the period of CIRs is related to the rotational period, we estimate the rotation rate of the four stars for which sufficient monitoring has been carried out, i.e., v{sub rot} = 6.5, 40, 70, and 275 km s{sup -1} for WR 1, WR 6, WR 134, and WR 137, respectively.

  18. State-to-state dynamics of the H{sup *}(n) + HD ? D{sup *}(n{sup ?}) + H{sub 2} reactive scattering

    SciTech Connect (OSTI)

    Yu, Shengrui; Su, Shu; Dai, Dongxu; Yuan, Kaijun, E-mail: kjyuan@dicp.ac.cn, E-mail: xmyang@dicp.ac.cn; Yang, Xueming, E-mail: kjyuan@dicp.ac.cn, E-mail: xmyang@dicp.ac.cn [State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023 (China)] [State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023 (China)

    2014-01-21

    The state-to-state dynamics of the H{sup *}(n) + HD ? D{sup *}(n{sup ?}) + H{sub 2} reactive scattering at the collision energy of 0.5 eV have been carried out for the first time by using H-atom Rydberg tagging time-of-flight technique. Experimental results show that the angular distribution of the total H{sub 2} products presents clearly forward-backward asymmetric, which considerably differs from that of the corresponding H{sup +} + HD ? D{sup +} + H{sub 2} reaction predicted by previously theoretical calculations. Such disagreement between these two processes suggests that the Fermi independent-collider model is also not valid in describing the dynamics of isotopic variants of the H{sup *} + H{sub 2} reaction. The rotational state distribution of the H{sub 2} products demonstrates a saw-toothed distribution with odd-j{sup ?} > even-j{sup ?}. This interesting observation is strongly influenced by nuclear spin statistics.

  19. IMPROVED V I log(gf) VALUES AND ABUNDANCE DETERMINATIONS IN THE PHOTOSPHERES OF THE SUN AND METAL-POOR STAR HD 84937

    SciTech Connect (OSTI)

    Lawler, J. E.; Wood, M. P.; Den Hartog, E. A.; Feigenson, T.; Sneden, C.; Cowan, J. J. E-mail: mpwood@wisc.edu E-mail: tfeigenson@wisc.edu E-mail: cowan@nhn.ou.edu

    2015-01-01

    New emission branching fraction measurements for 836 lines of the first spectrum of vanadium (V I) are determined from hollow cathode lamp spectra recorded with the National Solar Observatory 1 m Fourier transform spectrometer (FTS) and a high-resolution echelle spectrometer. The branching fractions are combined with recently published radiative lifetimes from laser-induced fluorescence measurements to determine accurate absolute atomic transition probabilities for the 836 lines. The FTS data are also used to extract new hyperfine structure A coefficients for 26 levels of neutral vanadium. These new laboratory data are applied to determine the V abundance in the Sun and metal-poor star HD 84937, yielding log ε(V) = 3.956 ± 0.004 (σ = 0.037) based on 93 V I lines and log ε(V) = 1.89 ± 0.03 (σ = 0.07) based on nine V I lines, respectively, using the Holweger-Müller 1D model. These new V I abundance values for the Sun and HD 84937 agree well with our earlier determinations based upon V II.

  20. POLARIZED LIGHT IMAGING OF THE HD142527 TRANSITION DISK WITH THE GEMINI PLANET IMAGER: DUST AROUND THE CLOSE-IN COMPANION

    SciTech Connect (OSTI)

    Rodigas, Timothy J.; Weinberger, Alycia; Follette, Katherine B.; Close, Laird; Hines, Dean C.

    2014-08-20

    When giant planets form, they grow by accreting gas and dust. HD142527 is a young star that offers a scaled-up view of this process. It has a broad, asymmetric ring of gas and dust beyond ?100AU and a wide inner gap. Within the gap, a low-mass stellar companion orbits the primary star at just ?12AU, and both the primary and secondary are accreting gas. In an attempt to directly detect the dusty counterpart to this accreted gas, we have observed HD142527 with the Gemini Planet Imager in polarized light at Y band (0.95-1.14 ?m). We clearly detect the companion in total intensity and show that its position and photometry are generally consistent with the expected values. We also detect a point source in polarized light that may be spatially separated by ? a fewAU from the location of the companion in total intensity. This suggests that dust is likely falling onto or orbiting the companion. Given the possible contribution of scattered light from this dust to previously reported photometry of the companion, the current mass limits should be viewed as upper limits only. If the dust near the companion is eventually confirmed to be spatially separated, this system would resemble a scaled-up version of the young planetary system inside the gap of the transition disk around LkCa 15.

  1. ANALYTICAL METHOD FOR MEASURING TOTAL PROTIUM AND TOTAL DEUTERIUM IN A GAS MIXTURE CONTAINING H2, D2,AND HD VIA GAS CHAROMATOGRAPHY

    SciTech Connect (OSTI)

    Sessions, H

    2007-08-07

    The most common analytical method of identifying and quantifying non-radioactive isotopic species of hydrogen is mass spectrometry. A low mass, high resolution mass spectrometer with adequate sensitivity and stability to identify and quantify hydrogen isotopes in the low ppm range is an expensive, complex instrument. A new analytical technique has been developed that measures both total protium (H) and total deuterium (D) in a gas mixture containing H{sub 2}, D{sub 2}, and HD using an inexpensive micro gas chromatograph (GC) with two molecular sieve columns. One column uses D{sub 2} as the carrier gas and the other uses H{sub 2} as the carrier gas. Laboratory tests have shown that when used in this configuration the GC can measure both total protium and total deuterium each with a detection and quantification limit of less than 20 ppm.

  2. VARIABILITY OF DISK EMISSION IN PRE-MAIN SEQUENCE AND RELATED STARS. III. EXPLORING STRUCTURAL CHANGES IN THE PRE-TRANSITIONAL DISK IN HD169142

    SciTech Connect (OSTI)

    Wagner, Kevin R.; Sitko, Michael L.; Swearingen, Jeremy R.; Champney, Elizabeth H.; Johnson, Alexa N.; Werren, Chelsea; Grady, Carol A.; Whitney, Barbara A.; Russell, Ray W.; Schneider, Glenn H.; Momose, Munetake; Muto, Takayuki; Inoue, Akio K.; Lauroesch, James T.; Hornbeck, Jeremy; Brown, Alexander; Fukagawa, Misato; Currie, Thayne M.; Wisniewski, John P.; Woodgate, Bruce E. E-mail: sitkoml@ucmail.uc.edu E-mail: ehchampney@gmail.com E-mail: ccwerren@yahoo.com E-mail: bwhitney@astro.wisc.edu

    2015-01-10

    We present near-IR (NIR) and far-UV observations of the pre-transitional (gapped) disk in HD169142 using NASA's Infrared Telescope Facility and Hubble Space Telescope. The combination of our data along with existing data sets into the broadband spectral energy distribution reveals variability of up to 45% between ?1.5-10 ?m over a maximum timescale of 10yr. All observations known to us separate into two distinct states corresponding to a high near-IR state in the pre-2000 epoch and a low state in the post-2000 epoch, indicating activity within the ?1 AU region of the disk. Through analysis of the Pa ? and Br ? lines in our data we derive a mass accretion rate in 2013 May of M-dot ? (1.5-2.7) 10{sup 9} M {sub ?} yr{sup 1}. We present a theoretical modeling analysis of the disk in HD169142 using Monte-Carlo radiative transfer simulation software to explore the conditions and perhaps signs of planetary formation in our collection of 24yr of observations. We find that shifting the outer edge (r ? 0.3 AU) of the inner disk by 0.05 AU toward the star (in simulation of accretion and/or sculpting by forming planets) successfully reproduces the shift in NIR flux. We establish that the ?40-70 AU dark ring imaged in the NIR by Quanz et al. and Momose et al. and at 7mm by Osorio et al. may be reproduced with a 30% scaled density profile throughout the region, strengthening the link to this structure being dynamically cleared by one or more planetary mass bodies.

  3. Time-dependent wave-packet quantum scattering study of the reactions D{sup -}+H{sub 2}{yields}H{sup -}+HD and H{sup -}+D{sub 2}{yields}D{sup -}+HD

    SciTech Connect (OSTI)

    Yao Li [State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Department of Physics, Dalian Maritime University, Dalian 116026 (China); Ju Liping; Han Keli [State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Chu Tianshu [State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Institute for Computational Sciences and Engineering, Qingdao University, Qingdao 266071 (China)

    2006-12-15

    The cross sections of the title reactions were calculated as functions of collision energy in the range 0.2-2.4 eV on a potential energy surface of Panda and Sathyamurthy [J. Chem. Phys. 121, 9343 (2004)]. The calculated results with the Coriolis coupled method were found to be more consistent with the experimental ones than the centrifugal sudden approximation, thus suggesting that Coriolis coupling plays an important role in those reactions. A pronounced isotopic effect was also revealed and attributed to the significant difference of the effective potential barrier height in both reactions.

  4. SU-E-T-569: Evaluation of VMAT Plans Generated with HD120 and Millennium 120 MLC Between Two Matched Linacs

    SciTech Connect (OSTI)

    Cui, G; Ballas, L; Chang, E; Chung, E; Chiu, R; Cummings, D; Shiu, A

    2014-06-01

    Purpose: To evaluate VMAT treatment plans generated with HD120 MLC and Millennium 120 MLC between two matched linacs and to determine if one can back up the other. Methods: The 6x photon beams are matched for our Varian TrueBeam STx and Trilogy linacs, which are equipped with HD120 MLC and Millennium 120 MLC, respectively. Three prostate and three brain VMAT plans were used for the evaluation. Five plans (three prostate and two brain plans) were originally generated with the TrueBeam STx and re-computed with the Trilogy. One brain plan was evaluated the other way around. For each plan, the PTV coverage of V95 was made the same between two linacs. The dosimetric differences associated with the plans were compared using: 1) Percentage mean dose differences to the PTV, 2) Homogeneity index, HI = (Dmax − Dmin)/Dmean for the PTV. For prostate plans, the mean dose differences to the rectum were evaluated. While for brain plans, the percentage max dose differences to the lenses (left and right lens) were evaluated. Results: For three prostate plans, the average of the percentage mean dose differences to the PTV was 0.5 ± 0.1% and the HI was 0.1 ± 0.0%. The average of the percentage mean dose difference to the rectum was 3.5 ± 0.5%. For three brain plans, the average of the percentage mean dose differences to the PTV was 0.2 ± 1.1% and the HI was 0.2 ± 0.1%. The average of the percentage max dose differences to the lenses was 22.9 ± 4.0%. Conclusion: For prostate VMAT plans, changing the treatment from the TrueBeam STx to the Trilogy does not necessarily need re-optimization. But for brain plans, in order to minimize dose to the lenses, it is recommended to re-optimize the plan if changing the treatment between these two linacs.

  5. Detailed abundances of planet-hosting wide binaries. I. Did planet formation imprint chemical signatures in the atmospheres of HD 20782/81?

    SciTech Connect (OSTI)

    Mack III, Claude E.; Stassun, Keivan G.; Schuler, Simon C.; Norris, John

    2014-06-01

    Using high-resolution, high signal-to-noise echelle spectra obtained with Magellan/MIKE, we present a detailed chemical abundance analysis of both stars in the planet-hosting wide binary system HD 20782 + HD 20781. Both stars are G dwarfs, and presumably coeval, forming in the same molecular cloud. Therefore we expect that they should possess the same bulk metallicities. Furthermore, both stars also host giant planets on eccentric orbits with pericenters ≲0.2 AU. Here, we investigate if planets with such orbits could lead to the host stars ingesting material, which in turn may leave similar chemical imprints in their atmospheric abundances. We derived abundances of 15 elements spanning a range of condensation temperature, T {sub C} ≈ 40-1660 K. The two stars are found to have a mean element-to-element abundance difference of 0.04 ± 0.07 dex, which is consistent with both stars having identical bulk metallicities. In addition, for both stars, the refractory elements (T {sub C} >900 K) exhibit a positive correlation between abundance (relative to solar) and T {sub C}, with similar slopes of ≈1×10{sup –4} dex K{sup –1}. The measured positive correlations are not perfect; both stars exhibit a scatter of ≈5×10{sup –5} dex K{sup –1} about the mean trend, and certain elements (Na, Al, Sc) are similarly deviant in both stars. These findings are discussed in the context of models for giant planet migration that predict the accretion of H-depleted rocky material by the host star. We show that a simple simulation of a solar-type star accreting material with Earth-like composition predicts a positive—but imperfect—correlation between refractory elemental abundances and T {sub C}. Our measured slopes are consistent with what is predicted for the ingestion of 10-20 Earths by each star in the system. In addition, the specific element-by-element scatter might be used to distinguish between planetary accretion and Galactic chemical evolution scenarios.

  6. Utility Potential Calculator

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

    for Potential Studies in the Northwest V1.0 Utility Potential Calculator V1.0 for Excel 2007 Utility Potential Calculator V1.0 for Excel 2003 Note: BPA developed the Utility...

  7. Potential Release Sites

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

    PRS Potential Release Sites Legacy sites where hazardous materials are found to be above acceptable levels are collectively called potential release sites. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email Less than 10 percent of the total number of potential release sites need to go through the full corrective action process. What are potential release sites? Potential release sites are areas around the Laboratory and

  8. Renewable Energy Economic Potential

    Broader source: Energy.gov [DOE]

    The report describes a geospatial analysis method to estimate the economic potential of several renewable resources available for electricity generation in the United States. Economic potential, one measure of renewable generation potential, is defined in this report as the subset of the available resource technical potential where the cost required to generate the electricity (which determines the minimum revenue requirements for development of the resource) is below the revenue available in terms of displaced energy and displaced capacity.

  9. Field matric potential sensor

    DOE Patents [OSTI]

    Hubbell, Joel M.; Sisson, James B.

    2001-01-01

    A method of determining matric potential of a sample, the method comprising placing the sample in a container, the container having an opening; and contacting the sample with a tensiometer via the opening. An apparatus for determining matric potential of a sample, the apparatus comprising a housing configured to receive a sample; a portable matric potential sensing device extending into the housing and having a porous member; and a wall closing the housing to insulate the sample and at least a portion of the matric potential sensing device including the porous member.

  10. WINDExchange: Potential Wind Capacity

    Wind Powering America (EERE)

    Potential Wind Capacity Potential wind capacity maps are provided for a 2014 industry standard wind turbine installed on a 110-m tower, which represents plausible current technology options, and a wind turbine on a 140-m tower, which represents near-future technology options. Enlarge image This map shows the wind potential at a 110-m height for the United States. Download a printable map. Click on a state to view the wind map for that state. * Grid Granularity = 400 sq km* 35% Gross Capacity

  11. Ground potential rise monitor

    DOE Patents [OSTI]

    Allen, Zachery Warren; Zevenbergen, Gary Allen

    2012-07-17

    A device and method for detecting ground potential rise (GPR) comprising a first electrode, a second electrode, and a voltage attenuator. The first electrode and the second electrode are both electrically connected to the voltage attenuator. A means for determining the presence of a dangerous ground potential is connected to the voltage attenuator. The device and method further comprises a means for enabling one or more alarms upon the detection of the dangerous ground potential. Preferably, a first transmitter/receiver is connected to the means for enabling one or more alarms. Preferably, a second transmitter/receiver, comprising a button, is electromagnetically connected to the first transmitter/receiver. Preferably, the means for determining the presence of a dangerous ground potential comprises a means for determining the true RMS voltage at the output of the voltage attenuator, a transient detector connected to the output of the voltage attenuator, or a combination thereof.

  12. Gas Turbine Heavy Hybrid Powertrain Variants. Opportunities and Potential for Systems Optimization

    SciTech Connect (OSTI)

    Smith, David; Chambon, Paul H.

    2015-07-01

    Widespread use of alternative hybrid powertrains is currently inevitable, and many opportunities for substantial progress remain. Hybrid electric vehicles (HEVs) have attracted considerable attention due to their potential to reduce petroleum consumption and greenhouse gas emissions in the transportation sector. This capability is mainly attributed to (a) the potential for downsizing the engine, (b) the potential for recovering energy during braking and thus recharging the energy storage unit, and (c) the ability to minimize the operation of the engine outside of its most efficient brake specific fuel consumption (BSFC) regime. Hybridization of the Class 8, heavy-duty (HD) powertrain is inherently challenging due to the expected long-haul driving requirements and limited opportunities for regenerative braking. The objective of this project is to develop control strategies aiming at optimizing the operation of a Class 8 HEV that features a micro-turbine as the heat engine. The micro-turbine application shows promise in fuel efficiency, even when compared to current diesel engines, and can meet regulated exhaust emissions levels with no exhaust after-treatment system. Both parallel and series HEV variants will be examined to understand the merits of each approach of the micro-turbine to MD advanced powertrain applications. These powertrain configurations enable new paradigms in operational efficiency, particularly in the Class 8 truck fleet. The successful development of these HEV variants will require a thorough technical understanding of the complex interactions between various energy sources and energy consumption components, for various operating modes. PACCAR will be integrating the first generation of their series HEV powertrain with a Brayton Energy micro-turbine into a Class 8 HD truck tractor that has both regional haul and local pick-up and delivery (P&D) components to its drive cycle. The vehicle will be deployed into fleet operation for a demonstration period of six (6) months to assess real world operating benefits of the advanced powertrain. A parallel variant of the micro-turbine powertrain will be built and sent to the ORNL Vehicle Systems Integration Laboratory.

  13. Ground potential rise monitor

    DOE Patents [OSTI]

    Allen, Zachery W. (Mandan, ND); Zevenbergen, Gary A. (Arvada, CO)

    2012-04-03

    A device and method for detecting ground potential rise (GPR) comprising positioning a first electrode and a second electrode at a distance from each other into the earth. The voltage of the first electrode and second electrode is attenuated by an attenuation factor creating an attenuated voltage. The true RMS voltage of the attenuated voltage is determined creating an attenuated true RMS voltage. The attenuated true RMS voltage is then multiplied by the attenuation factor creating a calculated true RMS voltage. If the calculated true RMS voltage is greater than a first predetermined voltage threshold, a first alarm is enabled at a local location. If user input is received at a remote location acknowledging the first alarm, a first alarm acknowledgment signal is transmitted. The first alarm acknowledgment signal is then received at which time the first alarm is disabled.

  14. Predicting window condensation potential

    SciTech Connect (OSTI)

    McGowan, A.

    1995-07-01

    Although a substantial amount of effort has been expended to develop numerical methods for determining window U-factors, there has been little work to date on using numerical methods to predict condensation potential. It is, perhaps, of direct interest to most ASHRAE members to determine heat loss and solar gains through windows as a preliminary step to sizing heating and cooling equipment, but condensation has long been recognized as an extremely important issue for consumers (and, consequently, for window manufacturers). Moreover, building scientists recognize the link between condensation and increased energy consumption (due to latent loads), reduced occupant comfort and inferior indoor air quality (from the presence of bacteria and mold), and structural damage (where accumulated condensation is absorbed by the building materials, thus reducing their structural stability). The National Fenestration Rating Council (NFRC) is developing a rating method for condensation potential in fenestration products, as part of its mandate from the Department of Energy. A rating method would benefit from the use of simulation as a supplement to physical condensation resistance testing, to reduce the cost and time required for implementation and increase the flexibility of the rating method. This article outlines the necessary components in the application of numerical methods for evaluating condensation in fenestration products, and describes the status of the development of these methods. The theoretical approach and its practical application are discussed, as well as some comparisons between numerical prediction and physical test results for a sample of products. Much of the technical discussion in this article can be found in ASHRAE Transactions.

  15. Static tetraquark and pentaquark potentials

    SciTech Connect (OSTI)

    Alexandrou, C.; Koutsou, G.

    2005-01-01

    We evaluate the static qqqq and qqqqq potentials in the quenched theory at {beta}=5.8 and {beta}=6.0 on a lattice of size 16{sup 3}x32. We compare the static potentials to the sum of two meson potentials for the tetraquark system and to the sum of the baryonic and mesonic potentials for the pentaquark state, as well as, with the confining potential obtained in the strong coupling expansion.

  16. Colorado Potential Geothermal Pathways

    SciTech Connect (OSTI)

    Zehner, Richard E.

    2012-02-01

    Citation Information: Originator: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Publication Date: 2012 Title: Colorado PRS Cool Fairways Edition: First Publication Information: Publication Place: Earth Science & Observation Center, Cooperative Institute for Research in Environmental Science (CIRES), University of Colorado, Boulder Publisher: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Description: This layer contains the weakened basement rocks. Isostatic gravity was utilized to identify structural basin areas, characterized by gravity low values reflecting weakened basement rocks. Together interpreted regional fault zones and basin outlines define geothermal "exploration fairways", where the potential exists for deep, superheated fluid flow in the absence of Pliocene or younger volcanic units Spatial Domain: Extent: Top: 4544698.569273 m Left: 144918.141004 m Right: 763728.391299 m Bottom: 4094070.397932 m Contact Information: Contact Organization: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Contact Person: Khalid Hussein Address: CIRES, Ekeley Building Earth Science & Observation Center (ESOC) 216 UCB City: Boulder State: CO Postal Code: 80309-0216 Country: USA Contact Telephone: 303-492-6782 Spatial Reference Information: Coordinate System: Universal Transverse Mercator (UTM) WGS’1984 Zone 13N False Easting: 500000.00000000 False Northing: 0.00000000 Central Meridian: -105.00000000 Scale Factor: 0.99960000 Latitude of Origin: 0.00000000 Linear Unit: Meter Datum: World Geodetic System ’1984 (WGS ’1984) Prime Meridian: Greenwich Angular Unit: Degree Digital Form: Format Name: Shape file

  17. RANGELAND SEQUESTRATION POTENTIAL ASSESSMENT

    SciTech Connect (OSTI)

    Lee Spangler; George F. Vance; Gerald E. Schuman; Justin D. Derner

    2012-03-31

    Rangelands occupy approximately half of the world's land area and store greater than 10% of the terrestrial biomass carbon and up to 30% of the global soil organic carbon. Although soil carbon sequestration rates are generally low on rangelands in comparison to croplands, increases in terrestrial carbon in rangelands resulting from management can account for significant carbon sequestration given the magnitude of this land resource. Despite the significance rangelands can play in carbon sequestration, our understanding remains limited. Researchers conducted a literature review to identify sustainably management practices that conserve existing rangeland carbon pools, as well as increase or restore carbon sequestration potentials for this type of ecosystem. The research team also reviewed the impact of grazing management on rangeland carbon dynamics, which are not well understood due to heterogeneity in grassland types. The literature review on the impact of grazing showed a wide variation of results, ranging from positive to negative to no response. On further review, the intensity of grazing appears to be a major factor in controlling rangeland soil organic carbon dynamics. In 2003, researchers conducted field sampling to assess the effect of several drought years during the period 1993-2002. Results suggested that drought can significantly impact rangeland soil organic carbon (SOC) levels, and therefore, carbon sequestration. Resampling was conducted in 2006; results again suggested that climatic conditions may have overridden management effects on SOC due to the ecological lag of the severe drought of 2002. Analysis of grazing practices during this research effort suggested that there are beneficial effects of light grazing compared to heavy grazing and non-grazing with respect to increased SOC and nitrogen contents. In general, carbon storage in rangelands also increases with increased precipitation, although researchers identified threshold levels of precipitation where sequestration begins to decrease.

  18. The hyperfine structure in the rotational spectra of D{sub 2}{sup 17}O and HD{sup 17}O: Confirmation of the absolute nuclear magnetic shielding scale for oxygen

    SciTech Connect (OSTI)

    Puzzarini, Cristina Cazzoli, Gabriele; Harding, Michael E.; Vzquez, Juana; Gauss, Jrgen

    2015-03-28

    Guided by theoretical predictions, the hyperfine structures of the rotational spectra of mono- and bideuterated-water containing {sup 17}O have been experimentally investigated. To reach sub-Doppler resolution, required to resolve the hyperfine structure due to deuterium quadrupole coupling as well as to spin-rotation (SR) and dipolar spin-spin couplings, the Lamb-dip technique has been employed. The experimental investigation and in particular, the spectral analysis have been supported by high-level quantum-chemical computations employing coupled-cluster techniques and, for the first time, a complete experimental determination of the hyperfine parameters involved was possible. The experimentally determined {sup 17}O spin-rotation constants of D{sub 2}{sup 17}O and HD{sup 17}O were used to derive the paramagnetic part of the corresponding nuclear magnetic shielding constants. Together with the computed diamagnetic contributions as well as the vibrational and temperature corrections, the latter constants have been employed to confirm the oxygen nuclear magnetic shielding scale, recently established on the basis of spin-rotation data for H{sub 2}{sup 17}O [Puzzarini et al., J. Chem. Phys. 131, 234304 (2009)].

  19. Commercial Building Toplighting: Energy Saving Potential and Potential Paths Forward

    SciTech Connect (OSTI)

    Lawrence, Tyson; Roth, Kurt W.

    2008-06-01

    This report documents the energy-saving potential of toplighting, a form of daylighting that combines skylights and electric lighting controls.

  20. Sandia National Laboratories: Potential Partners

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

    Potential Partners Potential Partners Sandia and one or more partners outside the federal government collaborate and share the results of a jointly conducted research and development project. Partners can be domestic or foreign and generally come from industry, nonprofit organizations or academia. Becoming a Partner SAM Registration The System for Award Management (SAM) is a government portal that enables secure registration as a potential CRADA Partner with Sandia National Laboratories.

  1. Sandia National Laboratories: Potential Sponsors

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

    Potential Sponsors Potential Partners Sandia has worked with a wide variety of Sponsors, including large companies and small businesses based in New Mexico. Projects involve a broad range of technologies including materials and materials processing, advanced manufacturing and precision engineering, microelectronics and photonics, advanced computing and information technologies, modeling and simulation, nanotechnologies, vulnerability analysis, robotics and intelligent systems, failure analysis

  2. Alternative Fuels Data Center

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

    Heavy-Duty Natural Gas Vehicle (NGV) Tax Credit Effective July 1, 2015, qualified taxpayers are eligible for a tax credit for the purchase of a qualified heavy-duty NGV. Each...

  3. Completeness for sparse potential scattering

    SciTech Connect (OSTI)

    Shen, Zhongwei

    2014-01-15

    The present paper is devoted to the scattering theory of a class of continuum Schrdinger operators with deterministic sparse potentials. We first establish the limiting absorption principle for both modified free resolvents and modified perturbed resolvents. This actually is a weak form of the classical limiting absorption principle. We then prove the existence and completeness of local wave operators, which, in particular, imply the existence of wave operators. Under additional assumptions on the sparse potential, we prove the completeness of wave operators. In the context of continuum Schrdinger operators with sparse potentials, this paper gives the first proof of the completeness of wave operators.

  4. Powertrain Trends and Future Potential

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

    Powertrain Trends and Future Potential * Global Trends - Fighting Global Warming * Clean Diesel - Neglected in the U.S. for Too Long Agenda DSNE-NA | August 4, 2009 | Robert ...

  5. Estimates of Green potentials. Applications

    SciTech Connect (OSTI)

    Danchenko, V I

    2003-02-28

    Optimal Cartan-type covers by hyperbolic discs of carriers of Green {alpha}-potentials are obtained in a simply connected domain in the complex plane and estimates of the potentials outside the carriers are presented. These results are applied to problems on the separation of singularities of analytic and harmonic functions. For instance, uniform and integral estimates in terms of Green capacities of components of meromorphic functions are obtained.

  6. Renewable Energy Technical Potential | Open Energy Information

    Open Energy Info (EERE)

    Renewable Energy Technical Potential Jump to: navigation, search Dictionary.png Renewable Energy Technical Potential: Renewable energy technical potential represents the achievable...

  7. Khler potentials for Planck inflation

    SciTech Connect (OSTI)

    Roest, Diederik; Scalisi, Marco; Zavala, Ivonne E-mail: m.scalisi@rug.nl

    2013-11-01

    We assess which Khler potentials in supergravity lead to viable single-field inflationary models that are consistent with Planck. We highlight the role of symmetries, such as shift, Heisenberg and supersymmetry, in these constructions. Also the connections to string theory are pointed out. Finally, we discuss a supergravity model for arbitrary inflationary potentials that is suitable for open string inflation and generalise it to the case of closed string inflation. Our model includes the recently discussed supergravity reformulation of the Starobinsky model of inflation as well as an interesting alternative with comparable predictions.

  8. LHC Physics Potential versus Energy

    SciTech Connect (OSTI)

    Quigg, Chris; /Fermilab

    2009-08-01

    Parton luminosities are convenient for estimating how the physics potential of Large Hadron Collider experiments depends on the energy of the proton beams. I present parton luminosities, ratios of parton luminosities, and contours of fixed parton luminosity for gg, u{bar d}, and qq interactions over the energy range relevant to the Large Hadron Collider, along with example analyses for specific processes.

  9. Nanobiocatalysis and Its Potential Applications

    SciTech Connect (OSTI)

    Kim, Jungbae; Grate, Jay W.; Wang, Ping

    2008-11-01

    Nanobiocatalysis with enzymes incorporated into nanostructured materials have emerged as a rapidly growing area. Structures including nanoporous media, nanofibers, carbon nanotubes, and nanoparticles have been found to be efficient in manipulating the nanoscale environment of the enzyme and thus promising exciting advances in many areas of enzyme technology. This review will describe these recent developments in nanobiocatalysis and their potential applications in various fields such as trypsin digestion in proteomic analysis, antifouling, biofuel cells, and biosensors.

  10. Design Potential of Metal Foil Substrates for Optimized DOC Performance |

    Broader source: Energy.gov (indexed) [DOE]

    Department of Energy Poster presentation at the 2007 Diesel Engine-Efficiency & Emissions Research Conference (DEER 2007). 13-16 August, 2007, Detroit, Michigan. Sponsored by the U.S. Department of Energy's (DOE) Office of FreedomCAR and Vehicle Technologies (OFCVT). PDF icon deer07_rice.pdf More Documents & Publications Components for Optimized SCR Systems Application of a Turbulent Metal Foil Substrate for a PGM optimized DOC on a U.S. HD Diesel Engine EGR Catalyst for Cooler

  11. Dirac solutions for quaternionic potentials

    SciTech Connect (OSTI)

    De Leo, Stefano Giardino, Sergio

    2014-02-15

    The Dirac equation is solved for quaternionic potentials, i?V{sub 0} + j?W{sub 0} (V{sub 0}?R , W{sub 0}?C). The study shows two different solutions. The first one contains particle and anti-particle solutions and leads to the diffusion, tunneling, and Klein energy zones. The standard solution is recovered taking the complex limit of this solution. The second solution, which does not have a complex counterpart, can be seen as a V{sub 0}-antiparticle or |W{sub 0}|-particle solution.

  12. Thin film mixed potential sensors

    DOE Patents [OSTI]

    Garzon, Fernando H.; Brosha, Eric L.; Mukundan, Rangachary

    2007-09-04

    A mixed potential sensor for oxidizable or reducible gases and a method of making. A substrate is provided and two electrodes are formed on a first surface of the substrate, each electrode being formed of a different catalytic material selected to produce a differential voltage between the electrodes from electrochemical reactions of the gases catalyzed by the electrode materials. An electrolytic layer of an electrolyte is formed over the electrodes to cover a first portion of the electrodes from direct exposure to the gases with a second portion of the electrodes uncovered for direct exposure to the gases.

  13. Potential Hydroelectric Development at Existing Federal Facilities...

    Open Energy Info (EERE)

    Potential Hydroelectric Development at Existing Federal Facilities Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Potential Hydroelectric Development at...

  14. Research highlights potential for improved solar cells

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

    Potential for improved solar cells Research highlights potential for improved solar cells Research has shown that carrier multiplication is a real phenomenon in tiny semiconductor ...

  15. Clot Busting Simulations Test Potential Stroke Treatment

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

    Clot Busting Simulations Test Potential Stroke Treatment Clot Busting Simulations Test Potential Stroke Treatment September 24, 2013 Contact: Linda Vu, +1 510 495 2402, lvu@lbl.gov ...

  16. Potential of Diazorphic, Endophytic Bacteria Associated with...

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

    Potential of Diazorphic, Endophytic Bacteria Associated with Sugarcane for Energycane Production Potential of Diazorphic, Endophytic Bacteria Associated with Sugarcane for Energycane ...

  17. Category:Self Potential | Open Energy Information

    Open Energy Info (EERE)

    page. S Self Potential Retrieved from "http:en.openei.orgwindex.php?titleCategory:SelfPotential&oldid794082" Feedback Contact needs updating Image needs updating...

  18. Handling and Packaging a Potentially Radiologically Contaminated...

    Office of Environmental Management (EM)

    Handling and Packaging a Potentially Radiologically Contaminated Patient Handling and Packaging a Potentially Radiologically Contaminated Patient The purpose of this procedure is...

  19. Ancillary Service Revenue Potential for Geothermal Generators...

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

    Ancillary Service Revenue Potential for Geothermal Generators in California Ancillary Service Revenue Potential for Geothermal Generators in California PDF icon Ancillary Service...

  20. Calculate and Plot Complex Potential

    Energy Science and Technology Software Center (OSTI)

    1998-05-05

    SOLUPLOT is a program designed to calculate and plot complex potential, pH diagrams and log oxygen activity, pH diagrams for aqueous chemical syatems, considering speciation of ligands, from free energy and thermodynamic activity data. These diagrams, commonly referred to as Eh-pH and ao2-pH diagrams, respectively, define areas of predominance in Eh-pH diagrams or ao2-pH space for chemical species of a chemical system at equilibrium. Over an area of predominance, one predominant species is at greatermore » activity than the other species of the system considered. The diagram axes, pH (a measure of hydrogen ion activity) and either Eh or log ao2 (measures of a tendency toward either oxidation or reduction) , are paremeters commonly applied in describing the chemistry of aqueous systems.« less

  1. The potential of renewable energy

    SciTech Connect (OSTI)

    Not Available

    1990-03-01

    On June 27 and 28, 1989, the US Department of Energy (DOE) national laboratories were convened to discuss plans for the development of a National Energy Strategy (NES) and, in particular, the analytic needs in support of NES that could be addressed by the laboratories. As a result of that meeting, interlaboratory teams were formed to produce analytic white papers on key topics, and a lead laboratory was designated for each core laboratory team. The broad-ranging renewables assignment is summarized by the following issue statement from the Office of Policy, Planning and Analysis: to what extent can renewable energy technologies contribute to diversifying sources of energy supply What are the major barriers to greater renewable energy use and what is the potential timing of widespread commercialization for various categories of applications This report presents the results of the intensive activity initiated by the June 1989 meeting to produce a white paper on renewable energy. Scores of scientists, analysts, and engineers in the five core laboratories gave generously of their time over the past eight months to produce this document. Their generous, constructive efforts are hereby gratefully acknowledged. 126 refs., 44 figs., 32 tabs.

  2. Kazakhstan's potential provides Western opportunities

    SciTech Connect (OSTI)

    Darnell, R. )

    1993-01-01

    While crude oil production continues to drop in the Russian Federation at a rate of 15% to 20% per year, Kazakhstan's output rose from 440,000 bopd in 1991 to 446,000 bopd, as of November 1992. Much of this increase was exported to the Russian Federation to supplement the latter's declining production. while Kazakhstan received needed Russian goods in exchange for this oil, it isn't getting the hard currency that will be required to upgrade its petroleum industry. This is a serious problem for Kazakh officials, since they are counting on revenues from petroleum exports to invigorate their overall plan for economic growth in this newly independent country. In order to convert Kazakhstan's hydrocarbon potential into economic reality, two critical issues must be addressed immediately. First, Kazakhstan must develop a tax and minerals law that gives multinational petroleum companies an incentive to invest in opening a dedicated crude oil export route through Russia, and at least one alternate export route to the Caspian Sea or Persian Gulf. At present, even the most successful petroleum venture inside Kazakhstan would have to weave its way through the Russian bureaucracy to utilize that existing and inadequate export pipeline system. This quandary, of course, has recently become the undoing of several Western petroleum operations that have managed to actually produce exportable oil inside the Russian Federation itself, but they can't get it out. In addition, three other variables should be considered by any party that is evaluating Kazakhstan as a future area (see map for current fields) of interest for petroleum operations. These are political stability, field operating conditions, and the country's natural gas crisis. Each of these factors, though not as critical as the legal regime and export access, can radically affect how an operator might approach negotiating the terms of its particular project.

  3. Transfer between the cesium 6 {sup 2}P{sub 1/2} and 6 {sup 2}P{sub 3/2} levels induced by collisions with H{sub 2}, HD, D{sub 2}, CH{sub 4}, C{sub 2}H{sub 6}, CF{sub 4}, and C{sub 2}F{sub 6}

    SciTech Connect (OSTI)

    Pitz, Greg A.; Fox, Charles D.; Perram, Glen P.

    2011-09-15

    The cross sections of spin-orbit energy exchange between the cesium 6 {sup 2}P{sub 1/2}{r_reversible}6 {sup 2}P{sub 3/2} states induced by collisions with N{sub 2}, H{sub 2}, HD, D{sub 2}, CH{sub 4}, C{sub 2}H{sub 6}, CF{sub 4}, and C{sub 2}F{sub 6} were obtained for pressures less than 100 Torr at room temperature by means of steady-state laser-induced fluorescence techniques. The spin-orbit energy exchange rate with N{sub 2}, H{sub 2}, HD, D{sub 2}, CH{sub 4}, C{sub 2}H{sub 6}, CF{sub 4}, and C{sub 2}F{sub 6}, have been measured as {sigma}{sub 21}(6 {sup 2}P{sub 3/2}{yields}6 {sup 2}P{sub 1/2})= 16.3, 34.1, 30.0, 22.7, 21.4, 65.6, 64.8, and 137 A{sup 2} and {sigma}{sub 12}(6 {sup 2}P{sub 1/2}{yields}6 {sup 2}P{sub 3/2})= 1.8, 4.4, 4.1, 3.0, 2.9, 13.3, 9.7, and 16.3 A{sup 2}, respectively. Correlations of the spin-orbit transfer probabilities with rotational-energy defect and vibrational-energy defect have been shown.

  4. Electrolytic Hydrogen Production: Potential Impacts to Utilities

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

    Electrolytic Hydrogen Production Potential Impacts to Utilities Electrolytic Hydrogen Production Workshop February 28, 2014 Frank Novachek Director, Corporate Planning 2...

  5. Potential for Biofuels from Algae (Presentation)

    SciTech Connect (OSTI)

    Pienkos, P. T.

    2007-11-15

    Presentation on the potential for biofuels from algae presented at the 2007 Algae Biomass Summit in San Francisco, CA.

  6. ARM Convective Available Potential Energy (CAPE), Convective...

    Office of Scientific and Technical Information (OSTI)

    Country of Publication: United States Availability: ORNL Language: English Subject: 54 Environmental Sciences ARMBE, Soundings; Convective Available Potential Energy (CAPE); ...

  7. Partners and Stakeholders: Roles and Potential Impact

    Broader source: Energy.gov [DOE]

    Partners and Stakeholders: Roles and Potential Impact, Chapter 6 from the Clean Energy Finance Guide, Third Edition

  8. Potential Health Hazards of Radiation | Department of Energy

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

    Potential Health Hazards of Radiation Potential Health Hazards of Radiation Potential Health Hazards of Radiation PDF icon Potential Health Hazards of Radiation More Documents & ...

  9. Identify Potential HITs | Department of Energy

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

    High Impact Technology Catalyst » Identify Potential HITs Identify Potential HITs Identify Potential HITs HIT prioritization is conducted each year based on quantitative, foundational criteria developed through a transparent, collaborative and consistent methodology designed to drive technologies through a step-by-step evaluation. The HIT prioritization methodology helps prioritize technologies for deployment focus and also ensures the open, consistent, two-way transfer of information and

  10. Pumped Storage and Potential Hydropower from Conduits

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

    ENERGY United States Department of Energy Washington, DC 20585 Message from the Secretary Th is Congressional Report, Pumped Storage Hydropower and Potential Hydropower from Conduits, addresses the technical flexibility that existing pumped storage facilities can provide to support intermittent renewable energy generation . This study considered potential upgrades or retrofit of these facilities, the technical potential of existing and new pumped storage facilities to provide grid reliability

  11. Pumped Storage and Potential Hydropower from Conduits

    SciTech Connect (OSTI)

    none,

    2015-02-25

    Th is Congressional Report, Pumped Storage Hydropower and Potential Hydropower from Conduits, addresses the technical flexibility that existing pumped storage facilities can provide to support intermittent renewable energy generation. This study considered potential upgrades or retrofit of these facilities, the technical potential of existing and new pumped storage facilities to provide grid reliability benefits, and the range of conduit hydropower opportunities available in the United States.

  12. NREL Research Identifies Increased Potential for Perovskites...

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

    Research Identifies Increased Potential for Perovskites as a Material for Solar Cells October 30, 2015 Scientists at the Energy Department's National Renewable Energy Laboratory ...

  13. The Snell law for quaternionic potentials

    SciTech Connect (OSTI)

    De Leo, Stefano; Ducati, Gisele C.

    2013-12-15

    By using the analogy between optics and quantum mechanics, we obtain the Snell law for the planar motion of quantum particles in the presence of quaternionic potentials.

  14. Alternative Ways of Financing Infrastructure Investment: Potential...

    Open Energy Info (EERE)

    Ways of Financing Infrastructure Investment: Potential for 'Novel' Financing Models Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Alternative Ways of Financing...

  15. Guide for Conducting Energy Efficiency Potential Studies

    SciTech Connect (OSTI)

    none,

    2007-11-01

    Provides guidance on determining the efficiency potential in a utility footprint, state, or region; evaluating efficiency as a supply-side resource; and developing detailed efficiency program plans.

  16. Aftertreatment Modeling Status, Futur Potential, and Application...

    Broader source: Energy.gov (indexed) [DOE]

    DaimlerChrysler NAFTA Truck Business Unit PDF icon 2004deerzhang.pdf More Documents & Publications SCR Potential and Issues for Heavy-Duty Applications in the United ...

  17. Potential for Data Center Efficiency Improvements | Department...

    Office of Environmental Management (EM)

    Data Center Efficiency Improvements Potential for Data Center Efficiency Improvements Document offers an overview of the Federal Energy Management Program's data center activities. ...

  18. Shape invariant potentials in higher dimensions

    SciTech Connect (OSTI)

    Sandhya, R.; Sree Ranjani, S.; Kapoor, A.K.

    2015-08-15

    In this paper we investigate the shape invariance property of a potential in one dimension. We show that a simple ansatz allows us to reconstruct all the known shape invariant potentials in one dimension. This ansatz can be easily extended to arrive at a large class of new shape invariant potentials in arbitrary dimensions. A reformulation of the shape invariance property and possible generalizations are proposed. These may lead to an important extension of the shape invariance property to Hamiltonians that are related to standard potential problems via space time transformations, which are found useful in path integral formulation of quantum mechanics.

  19. Sandia National Laboratories: Working with Sandia: Potential...

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

    Potential Suppliers Man with Computer Becoming a Supplier to Sandia Sandia spends about 1 billion each year on purchases of quality products and services to meet its national...

  20. Global Renewable Resource Potential | Open Energy Information

    Open Energy Info (EERE)

    Quality of Renewable Energy Potential 3 Representation of Challenges 4 Generation of New Climate Change Mitigation Scenarios 5 References Introduction A wind farm located in...

  1. Webinar: Potential Strategies for Integrating Solar Hydrogen...

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

    Eastern Standard Time (EST). An analysis conducted by Sandia National Laboratories explored potential synergies that may be realized by integrating solar hydrogen production and ...

  2. Potential Strategies for Integrating Solar Hydrogen Production...

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

    Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis U.S. Department of Energy Fuel Cell Technologies Office January ...

  3. Spontaneous Potential Well Log | Open Energy Information

    Open Energy Info (EERE)

    Log Chemical Logging Density Log Gamma Log Image Logs Mud Logging Neutron Log Pressure Temperature Log Single-Well and Cross-Well Resistivity Spontaneous Potential Well Log...

  4. Potential Water and Energy Savings from Showerheads

    SciTech Connect (OSTI)

    Biermayer, Peter J.

    2005-09-28

    This paper estimates the benefits and costs of six water reduction scenarios. Benefits and costs of showerhead scenarios are ranked in this paper by an estimated water reduction percentage. To prioritize potential water and energy saving scenarios regarding showerheads, six scenarios were analyzed for their potential water and energy savings and the associated dollar savings to the consumer.

  5. Spontaneous Potential (book section) | Open Energy Information

    Open Energy Info (EERE)

    Reference LibraryAdd to library Book Section: Spontaneous Potential (book section) Author NA Published NA, The date "NA" was not understood.The date "NA" was not understood....

  6. Solar Power Potential in SE New Mexico

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

    Solar Power Potential in Southeast New Mexico Solar Power Project Opportunities Abound in the Region The WIPP site is receives abundant solar energy with 6-7 kWhsq meter power ...

  7. POTENTIAL DIMETHYLMERCURY CONCENTRATION IN WATER & ORGANIC CONDENSATE

    SciTech Connect (OSTI)

    MEACHAM, J.E.

    2004-12-28

    This document bounds potential dimethylmercury concentration in water or organic condensate that might form in ventilation systems or cooler tank regions. Dimethylmercury concentrations were extremely low and would be below drinking water standards in the water condensate.

  8. Maximizing the Potential of Renewable Energy

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

    cell efficiencies by 10%, to over 30%. * Low Cost III-V 1J & 2J Cells - Potential to lower III-V growth cost by 1 - 2 orders of magnitude. * "Kerfless Si" Wafers & Cells -...

  9. Potential Yield Mapping of Dedicated Energy Crops

    Broader source: Energy.gov [DOE]

    Breakout Session 1B—Integration of Supply Chains I: Breaking Down Barriers Potential Yield Mapping of Dedicated Energy Crops Chris Daly, Director, PRISM Climate Group, Oregon State University

  10. Applying supersymmetry to energy dependent potentials

    SciTech Connect (OSTI)

    Yekken, R.; Lassaut, M.; Lombard, R.J.

    2013-11-15

    We investigate the supersymmetry properties of energy dependent potentials in the D=1 dimensional space. We show the main aspects of supersymmetry to be preserved, namely the factorization of the Hamiltonian, the connections between eigenvalues and wave functions of the partner Hamiltonians. Two methods are proposed. The first one requires the extension of the usual rules via the concept of local equivalent potential. In this case, the superpotential becomes depending on the state. The second method, applicable when the potential depends linearly on the energy, is similar to what has been already achieved by means of the Darboux transform. -- Highlights: Supersymmetry extended to energy dependent potentials. Generalization of the concept of superpotential. An alternative method used for linear E-dependence leads to the same results as Darboux transform.

  11. Tiny Glass Bubbles With Big Potential

    Broader source: Energy.gov [DOE]

    If these glass microspheres' walls could talk…They would explain how their tiny pores allow the potential for handling, storing and transporting a variety of materials, including drugs that have...

  12. SFA 2.0- Metabolic Potential

    SciTech Connect (OSTI)

    Banfield, Jill; Beller, Harry

    2015-02-17

    Berkeley Lab Earth Scientists Jill Banfield and Harry Beller explain the Sustainable Systems SFA 2.0 project's research on metabolic potentialor how metabolic lifestyles of microbial communities modulate in response to as well as influence environmental change.

  13. Environmental Assessment Fact Sheet - Potential Impacts

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

    DOE has prepared a draft Environmental Assessment for Conducting Astrophysics and Other Basic Science Experiments at the WIPP Site. It examines the potential environmental consequences from conducting particular types of scientific experiments in an area of the WIPP underground called the experiment gallery. The environmental assessment also looks at the potential cumulative impacts of conducting experiments and operating the WIPP as a transuranic waste repository. This fact sheet presents

  14. Missing solution in a Cornell potential

    SciTech Connect (OSTI)

    Castro, L.B.; Castro, A.S. de

    2013-11-15

    Missing bound-state solutions for fermions in the background of a Cornell potential consisting of a mixed scalarvectorpseudoscalar coupling is examined. Charge-conjugation operation, degeneracy and localization are discussed. -- Highlights: The Dirac equation with scalarvectorpseudoscalar Cornell potential is investigated. The isolated solution from the SturmLiouville problem is found. Charge-conjugation operation, degeneracy and localization are discussed.

  15. Unearthing Geothermal's Potential | Department of Energy

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

    Unearthing Geothermal's Potential Unearthing Geothermal's Potential September 16, 2010 - 12:33pm Addthis Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs Our latest geothermal technologies awards are for those who think outside of the box (and below the surface). Secretary of Energy Steven Chu announced $20 million towards the research and development of non-conventional geothermal energy technologies in three areas: low temperatures fluids, geothermal fluids

  16. Researchers modeling the potential for induced seismicity

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

    Researchers modeling the potential for induced seismicity Researchers modeling the potential for induced seismicity Researchers conducted modeling studies to better understand triggers of induced earthquake activity caused by injection of large volumes of liquid CO2. October 8, 2014 Summary of multiple injection well simulations after 10 years. Stars represent injection wells. Summary of multiple injection well simulations after 10 years. Stars represent injection wells. The team used the LANL

  17. Clot Busting Simulations Test Potential Stroke Treatment

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

    Clot Busting Simulations Test Potential Stroke Treatment Clot Busting Simulations Test Potential Stroke Treatment September 24, 2013 Contact: Linda Vu, +1 510 495 2402, lvu@lbl.gov Calvariasetup.jpg The array transducer in position above the calvaria (skull). Shown are the ends of the array elements above the computational model of the skull. Researchers are using computer simulations to investigate how ultrasound and tiny bubbles injected into the bloodstream might break up blood clots,

  18. Property:PotentialHydropowerSites | Open Energy Information

    Open Energy Info (EERE)

    Property Name PotentialHydropowerSites Property Type Number Description The number of potential hydropower sites in a place. Pages using the property "PotentialHydropowerSites"...

  19. Microsoft Word - BPA Utility Potential Calculator Guidebook V1...

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

    installed, and the result is the overall potential for that device (Figure 1). Figure 1 Energy Efficiency Savings Potential Assessment A potential study expands on this concept...

  20. Potential effects of gallium on cladding materials

    SciTech Connect (OSTI)

    Wilson, D.F.; Beahm, E.C.; Besmann, T.M.; DeVan, J.H.; DiStefano, J.R.; Gat, U.; Greene, S.R.; Rittenhouse, P.L.; Worley, B.A.

    1997-10-01

    This paper identifies and examines issues concerning the incorporation of gallium in weapons derived plutonium in light water reactor (LWR) MOX fuels. Particular attention is given to the more likely effects of the gallium on the behavior of the cladding material. The chemistry of weapons grade (WG) MOX, including possible consequences of gallium within plutonium agglomerates, was assessed. Based on the calculated oxidation potentials of MOX fuel, the effect that gallium may have on reactions involving fission products and possible impact on cladding performance were postulated. Gallium transport mechanisms are discussed. With an understanding of oxidation potentials and assumptions of mechanisms for gallium transport, possible effects of gallium on corrosion of cladding were evaluated. Potential and unresolved issues and suggested research and development (R and D) required to provide missing information are presented.

  1. Bond order potential module for LAMMPS

    Energy Science and Technology Software Center (OSTI)

    2012-09-11

    pair_bop is a module for performing energy calculations using the Bond Order Potential (BOP) for use in the parallel molecular dynamics code LAMMPS. The bop pair style computes BOP based upon quantum mechanical incorporating both sigma and pi bondings. By analytically deriving the BOP pair bop from quantum mechanical theory its transferability to different phases can approach that of quantum mechanical methods. This potential is extremely effective at modeling 111-V and II-VI compounds such asmore » GaAs and CdTe. This potential is similar to the original BOP developed by Pettifor and later updated by Murdock et al. and Ward et al.« less

  2. Analytic models of plausible gravitational lens potentials

    SciTech Connect (OSTI)

    Baltz, Edward A.; Marshall, Phil; Oguri, Masamune, E-mail: eabaltz@slac.stanford.edu, E-mail: pjm@physics.ucsb.edu, E-mail: oguri@slac.stanford.edu [Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, PO Box 20450, MS29, Stanford, CA 94309 (United States)] [Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, PO Box 20450, MS29, Stanford, CA 94309 (United States)

    2009-01-15

    Gravitational lenses on galaxy scales are plausibly modelled as having ellipsoidal symmetry and a universal dark matter density profile, with a Sersic profile to describe the distribution of baryonic matter. Predicting all lensing effects requires knowledge of the total lens potential: in this work we give analytic forms for that of the above hybrid model. Emphasising that complex lens potentials can be constructed from simpler components in linear combination, we provide a recipe for attaining elliptical symmetry in either projected mass or lens potential. We also provide analytic formulae for the lens potentials of Sersic profiles for integer and half-integer index. We then present formulae describing the gravitational lensing effects due to smoothly-truncated universal density profiles in cold dark matter model. For our isolated haloes the density profile falls off as radius to the minus fifth or seventh power beyond the tidal radius, functional forms that allow all orders of lens potential derivatives to be calculated analytically, while ensuring a non-divergent total mass. We show how the observables predicted by this profile differ from that of the original infinite-mass NFW profile. Expressions for the gravitational flexion are highlighted. We show how decreasing the tidal radius allows stripped haloes to be modelled, providing a framework for a fuller investigation of dark matter substructure in galaxies and clusters. Finally we remark on the need for finite mass halo profiles when doing cosmological ray-tracing simulations, and the need for readily-calculable higher order derivatives of the lens potential when studying catastrophes in strong lenses.

  3. Economic Energy Savings Potential in Federal Buildings

    SciTech Connect (OSTI)

    Brown, Daryl R.; Dirks, James A.; Hunt, Diane M.

    2000-09-04

    The primary objective of this study was to estimate the current life-cycle cost-effective (i.e., economic) energy savings potential in Federal buildings and the corresponding capital investment required to achieve these savings, with Federal financing. Estimates were developed for major categories of energy efficiency measures such as building envelope, heating system, cooling system, and lighting. The analysis was based on conditions (building stock and characteristics, retrofit technologies, interest rates, energy prices, etc.) existing in the late 1990s. The potential impact of changes to any of these factors in the future was not considered.

  4. Fly Ash Characteristics and Carbon Sequestration Potential

    SciTech Connect (OSTI)

    Palumbo, Anthony V.; Amonette, James E.; Tarver, Jana R.; Fagan, Lisa A.; McNeilly, Meghan S.; Daniels, William L.

    2007-07-20

    Concerns for the effects of global warming have lead to an interest in the potential for inexpensive methods to sequester carbon dioxide (CO2). One of the proposed methods is the sequestration of carbon in soil though the growth of crops or forests.4,6 If there is an economic value placed on sequestration of carbon dioxide in soil there may be an an opportunity and funding to utilize fly ash in the reclamation of mine soils and other degraded lands. However, concerns associated with the use of fly ash must be addressed before this practice can be widely adopted. There is a vast extent of degraded lands across the world that has some degree of potential for use in carbon sequestration. Degraded lands comprise nearly 2 X 109 ha of land throughout the world.7 Although the potential is obviously smaller in the United States, there are still approximately 4 X 106 ha of degraded lands that previously resulted from mining operations14 and an additional 1.4 X 108 ha of poorly managed lands. Thus, according to Lal and others the potential is to sequester approximately 11 Pg of carbon over the next 50 years.1,10 The realization of this potential will likely be dependent on economic incentives and the use of soil amendments such as fly ash. There are many potential benefits documented for the use of fly ash as a soil amendment. For example, fly ash has been shown to increase porosity, water-holding capacity, pH, conductivity, and dissolved SO42-, CO32-, HCO3-, Cl- and basic cations, although some effects are notably decreased in high-clay soils.8,13,9 The potential is that these effects will promote increased growth of plants (either trees or grasses) and result in greater carbon accumulation in the soil than in untreated degraded soils. This paper addresses the potential for carbon sequestration in soils amended with fly ash and examines some of the issues that should be considered in planning this option. We describe retrospective studies of soil carbon accumulation on reclaimed mine lands, leaching studies of fly ash and carbon sorption studies of fly ash.

  5. Alternative Fuels Data Center

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    of a qualified Phill NGV home fueling appliance. SCAQMD and the Mobile Source Air Pollution Reduction Review Committee provide funding for the program, which will...

  6. REGULATORY COOPERATION COUNCIL - WORK PLANNING FORMAT: Natural...

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

    COUNCIL - WORK PLANNING FORMAT: Natural Gas Use in Transportation PDF icon RCC Workplan NGV.PDF More Documents & Publications REGULATORY COOPERATION COUNCIL - WORK PLANNING ...

  7. Next Generation Natural Gas Vehicle Activity: Natural Gas Engine and Vehicle Research & Development (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2003-09-01

    This fact sheet describes the status of the Next Generation Natural Gas Vehicle (NGNGV) activity, including goals, R&D progress, NGV implementation, and the transition to hydrogen.

  8. Towards an understanding of the nuclear potential

    SciTech Connect (OSTI)

    Richards, D.G.; Sinclair, D.K.; Sivers, D.

    1988-01-01

    The formalism for investigating the /bar Q/q/bar Q/q system on the lattice is constructed. We describe how the model may be used to study the nuclear potential, and present some preliminary results on the range of the nuclear force. 6 refs., 4 figs., 1 tab.

  9. Kaonic hydrogen atoms with realistic potentials

    SciTech Connect (OSTI)

    Yan, Y.; Poonsawat, W.; Khosonthongkee, K.; Kobdaj, C.; Suebka, P.

    2010-06-15

    Kaonic hydrogen is studied with various realistic potentials in an accurate numerical approach based on Sturmian functions. It is found that the mass difference between the K{sup -}p and K-bar{sup 0}n channels has a considerable effect on theoretical results of the energy shift and decay width of kaonic hydrogen. On average, the theoretical result in the isospin symmetry limit is smaller by a factor of about 20% than the full result where the mass difference between the K{sup -}p and K-bar{sup 0}n channels is properly treated. The theoretical results based on realistic local potentials, which reproduce well scattering data, are inconsistent with the recent measurement of the energy shift and decay width of the 1s kaonic hydrogen state by the DEAR Collaboration.

  10. Potential for cogeneration in Maryland. Volume 1

    SciTech Connect (OSTI)

    Not Available

    1993-03-01

    Cogeneration is a name given to energy systems that produce both electric power and useful thermal energy such as steam. While cogeneration markets have flourished in California, Texas, and some states, those in Maryland have not. A primary reason is that the industries that have been targeted in other states--e.g., oil refining, pulp and paper, chemicals, food processing--are not major elements of Maryland's industrial base. The study estimates the potential for future cogeneration in Maryland, both large units and small packaged systems, and assesses the potential impact of cogeneration systems on Maryland's energy needs between now and 2005. The study is presented in three volumes. Because of significant differences between large- and small-scale cogeneration, the analysis of these two systems was performed separately. This volume is a summary document presenting the findings from both studies.

  11. Energy Savings Potential of Radiative Cooling Technologies

    SciTech Connect (OSTI)

    Fernandez, Nicholas; Wang, Weimin; Alvine, Kyle J.; Katipamula, Srinivas

    2015-11-30

    Pacific Northwest National Laboratory (PNNL), with funding from the U.S. Department of Energy’s (DOE’s) Building Technologies Program (BTP), conducted a study to estimate, through simulation, the potential cooling energy savings that could be achieved through novel approaches to capturing free radiative cooling in buildings, particularly photonic ‘selective emittance’ materials. This report documents the results of that study.

  12. Wind Energy Potential in SE New Mexico

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

    click to return to the Renewable Energy page Return to Renewable Energy Page Wind Energy in Southeast New Mexico Several Ongoing and New Wind Power Projects are Contributing to Making Renewable Energy Sources an Important Economic and Environmental Mainstay of the Region As the accompanying map of New Mexico shows, the best wind power generation potential near WIPP is along the Delaware Mountain ridge line of the southern Guadalupe Mountains, about 50-60 miles southwest. The numeric grid values

  13. Yukawa particles in a confining potential

    SciTech Connect (OSTI)

    Girotto, Matheus Levin, Yan; Santos, Alexandre P. dos; Colla, Thiago

    2014-07-07

    We study the density distribution of repulsive Yukawa particles confined by an external potential. In the weak coupling limit, we show that the mean-field theory is able to accurately account for the particle distribution. In the strong coupling limit, the correlations between the particles become important and the mean-field theory fails. For strongly correlated systems, we construct a density functional theory which provides an excellent description of the particle distribution, without any adjustable parameters.

  14. Assessing the Economic Potential of Advanced Biofuels

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

    the Economic Potential of Advanced Biofuels - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste

  15. Polymer escape from a confining potential

    SciTech Connect (OSTI)

    Mkknen, Harri; Faculty of Physical Sciences, University of Iceland, Reykjavk ; Ikonen, Timo; VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044 VTT ; Jnsson, Hannes; Faculty of Physical Sciences, University of Iceland, Reykjavk; Department of Physics, Brown University, Providence, Rhode Island 02912-1843 ; Ala-Nissila, Tapio; Department of Physics, Brown University, Providence, Rhode Island 02912-1843

    2014-02-07

    The rate of escape of polymers from a two-dimensionally confining potential well has been evaluated using self-avoiding as well as ideal chain representations of varying length, up to 80 beads. Long timescale Langevin trajectories were calculated using the path integral hyperdynamics method to evaluate the escape rate. A minimum is found in the rate for self-avoiding polymers of intermediate length while the escape rate decreases monotonically with polymer length for ideal polymers. The increase in the rate for long, self-avoiding polymers is ascribed to crowding in the potential well which reduces the free energy escape barrier. An effective potential curve obtained using the centroid as an independent variable was evaluated by thermodynamic averaging and Kramers rate theory then applied to estimate the escape rate. While the qualitative features are well reproduced by this approach, it significantly overestimates the rate, especially for the longer polymers. The reason for this is illustrated by constructing a two-dimensional effective energy surface using the radius of gyration as well as the centroid as controlled variables. This shows that the description of a transition state dividing surface using only the centroid fails to confine the system to the region corresponding to the free energy barrier and this problem becomes more pronounced the longer the polymer is. A proper definition of a transition state for polymer escape needs to take into account the shape as well as the location of the polymer.

  16. FUEL CYCLE POTENTIAL WASTE FOR DISPOSITION

    SciTech Connect (OSTI)

    Jones, R.; Carter, J.

    2010-10-13

    The United States (U.S.) currently utilizes a once-through fuel cycle where used nuclear fuel (UNF) is stored on-site in either wet pools or in dry storage systems with ultimate disposal in a deep mined geologic repository envisioned. Within the Department of Energy's (DOE) Office of Nuclear Energy (DOE-NE), the Fuel Cycle Research and Development Program (FCR&D) develops options to the current commercial fuel cycle management strategy to enable the safe, secure, economic, and sustainable expansion of nuclear energy while minimizing proliferation risks by conducting research and development of advanced fuel cycles, including modified open and closed cycles. The safe management and disposition of used nuclear fuel and/or nuclear waste is a fundamental aspect of any nuclear fuel cycle. Yet, the routine disposal of used nuclear fuel and radioactive waste remains problematic. Advanced fuel cycles will generate different quantities and forms of waste than the current LWR fleet. This study analyzes the quantities and characteristics of potential waste forms including differing waste matrices, as a function of a variety of potential fuel cycle alternatives including: (1) Commercial UNF generated by uranium fuel light water reactors (LWR). Four once through fuel cycles analyzed in this study differ by varying the assumed expansion/contraction of nuclear power in the U.S; (2) Four alternative LWR used fuel recycling processes analyzed differ in the reprocessing method (aqueous vs. electro-chemical), complexity (Pu only or full transuranic (TRU) recovery) and waste forms generated; (3) Used Mixed Oxide (MOX) fuel derived from the recovered Pu utilizing a single reactor pass; and (4) Potential waste forms generated by the reprocessing of fuels derived from recovered TRU utilizing multiple reactor passes.

  17. FUEL CYCLE POTENTIAL WASTE FOR DISPOSITION

    SciTech Connect (OSTI)

    Carter, J.

    2011-01-03

    The United States (U.S.) currently utilizes a once-through fuel cycle where used nuclear fuel (UNF) is stored on-site in either wet pools or in dry storage systems with ultimate disposal in a deep mined geologic repository envisioned. Within the Department of Energy's (DOE) Office of Nuclear Energy (DOE-NE), the Fuel Cycle Research and Development Program (FCR&D) develops options to the current commercial fuel cycle management strategy to enable the safe, secure, economic, and sustainable expansion of nuclear energy while minimizing proliferation risks by conducting research and development of advanced fuel cycles, including modified open and closed cycles. The safe management and disposition of used nuclear fuel and/or nuclear waste is a fundamental aspect of any nuclear fuel cycle. Yet, the routine disposal of used nuclear fuel and radioactive waste remains problematic. Advanced fuel cycles will generate different quantities and forms of waste than the current LWR fleet. This study analyzes the quantities and characteristics of potential waste forms including differing waste matrices, as a function of a variety of potential fuel cycle alternatives including: (1) Commercial UNF generated by uranium fuel light water reactors (LWR). Four once through fuel cycles analyzed in this study differ by varying the assumed expansion/contraction of nuclear power in the U.S. (2) Four alternative LWR used fuel recycling processes analyzed differ in the reprocessing method (aqueous vs. electro-chemical), complexity (Pu only or full transuranic (TRU) recovery) and waste forms generated. (3) Used Mixed Oxide (MOX) fuel derived from the recovered Pu utilizing a single reactor pass. (4) Potential waste forms generated by the reprocessing of fuels derived from recovered TRU utilizing multiple reactor passes.

  18. Fluid properties determine flow line blockage potential

    SciTech Connect (OSTI)

    Hunt, A.

    1996-07-15

    A thorough understanding of fluid properties helps in determining the potential of hydrates, paraffins, or asphaltenes to block subsea flow lines. Thermal, chemical, and mechanical methods are the main ways for preventing deposition. Already in both the North Sea and the Gulf of Mexico, blockages have led to significant losses in production and reserves recovery. This first article in a two-part series discusses thermal and chemical methods in overcoming fluid behavior problems caused by hydrate and other fluid constituents in subsea multiphase flow. The paper discusses subsea production, possible problems, nucleation, growth, deposition, preventing deposition, hydrate predictions, multiphase flow, and hydrate inhibition.

  19. Ohio Hydropower Potential Inventory Phase I report

    SciTech Connect (OSTI)

    Not Available

    1981-12-01

    The dams researched in the Ohio Department of Natural Resources (ODNR) files were those contained in a list of Ohio dams provided by the ODNR. The result of this file research is a list of 997 dams contained herein that tabulates information on hydraulic head, stream flow, drainage area, and usage. This listing indicated that all but 137 of the 997 dams can be eliminated from consideration for Phase II research. The second phase would be required to further identify which of the 137 dams might have viable hydroelectric potential and define their basic hydroelectric parameters.

  20. Potential underground risks associated with CAES.

    SciTech Connect (OSTI)

    Kirk, Matthew F.; Webb, Stephen Walter; Broome, Scott Thomas; Pfeifle, Thomas W.; Grubelich, Mark Charles; Bauer, Stephen J.

    2010-10-01

    CAES in geologic media has been proposed to help 'firm' renewable energy sources (wind and solar) by providing a means to store energy when excess energy was available, and to provide an energy source during non-productive renewable energy time periods. Such a storage media may experience hourly (perhaps small) pressure swings. Salt caverns represent the only proven underground storage used for CAES, but not in a mode where renewable energy sources are supported. Reservoirs, both depleted natural gas and aquifers represent other potential underground storage vessels for CAES, however, neither has yet to be demonstrated as a functional/operational storage media for CAES.

  1. Feynman integral treatment of the Bargmann potential

    SciTech Connect (OSTI)

    Diaf, A.; Chouchaoui, A. . E-mail: akchouchaoui@yahoo.fr; Lombard, R.J.

    2005-06-01

    A method based on path integral formulation is given for obtaining exact solution of the s states for the Bargmann potentialV(r)=1ka{sup 2}{beta}({beta}-1)e{sup -2r/a}1-e{sup -r/a2}-Ae{sup -r/a}1-e{sup -r=} /{sup a},where {beta} and k are parameters. The exact energy spectrum and the normalised s-state eigenfunctions are obtained from the poles of the Green function and their residues, respectively. The results are compared with their of Schrodinger formalism, special cases are also discussed.

  2. Potential-well distortion in barrier Rf

    SciTech Connect (OSTI)

    King Ng

    2004-04-29

    Head-tail asymmetry has been observed in the longitudinal beam profiles in the Fermilab Recycler Ring where protons or antiprotons are stored in rf barrier buckets. The asymmetry is caused by the distortion of the rf potential well in the presence of resistive impedance. Gaussian energy distribution can fit the observed asymmetric beam profile but not without discrepancy. It can also fit the measured energy distribution. On the other hand, generalized elliptic distribution gives a better fit to the beam profile. However, it fails to reproduce the observed energy distribution.

  3. FERC sees huge potential for demand response

    SciTech Connect (OSTI)

    2010-04-15

    The FERC study concludes that U.S. peak demand can be reduced by as much as 188 GW -- roughly 20 percent -- under the most aggressive scenario. More moderate -- and realistic -- scenarios produce smaller but still significant reductions in peak demand. The FERC report is quick to point out that these are estimates of the potential, not projections of what could actually be achieved. The main varieties of demand response programs include interruptible tariffs, direct load control (DLC), and a number of pricing schemes.

  4. Theoretical studies of potential energy surfaces

    SciTech Connect (OSTI)

    Harding, L.B.

    1993-12-01

    The goal of this program is to calculate accurate potential energy surfaces (PES) for both reactive and nonreactive systems. To do this the electronic Schrodinger equation must be solved. Our approach to this problem starts with multiconfiguration self-consistent field (MCSCF) reference wavefunctions. These reference wavefunctions are designed to be sufficiently flexible to accurately describe changes in electronic structure over a broad range of geometries. Electron correlation effects are included via multireference, singles and doubles configuration interaction (MRSDCI) calculations. With this approach, the authors are able to provide useful predictions of the energetics for a broad range of systems.

  5. Numerical prediction of window condensation potential

    SciTech Connect (OSTI)

    McGowan, A.G.

    1995-08-01

    Although a substantial amount of effort has been expended to develop numerical methods for determining windows U-factors (EE 1983; Goss and Curcija 1994; Standaert 1985; CSA 1993a; NFRC 1991), there has been little work to data on using numerical methods to predict condensation potential. It is perhaps of direct interest to most ASHRAE members to determine heat loss and solar gains through windows as a precursor to sizing heating and cooling equipment, but condensation has long been recognized as an extremely important issue for consumers (and, consequently, for window manufacturers). Moreover, building scientists recognize the link between condensation and increased energy consumption (due to latent loads), reduced occupant comfort and indoor air quality (from the presence of bacteria and mold), and structural damage (where accumulated condensation is absorbed by the building material, thus reducing their structural stability). The National Fenestration Rating Council (NFRC) is developing a rating method for condensation potential in fenestration products as part of its mandate from the US Department of Energy (DOE). A rating method would benefit from the use of simulation as a supplement to physical condensation resistance testing to reduce the cost and time required for implementation and increase the flexibility of the rating method. This paper outlines one of the necessary components in the application of numerical methods for evaluating condensation in fenestration products. The theoretical approach and its practical application are discussed, as well as some comparisons between numerical prediction and physical test results for a sample of products.

  6. The Energy Efficiency Potential of Global Transport to 2050 ...

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

    The Energy Efficiency Potential of Global Transport to 2050 The Energy Efficiency Potential of Global Transport to 2050 Broad view of sustainability of global transportation PDF ...

  7. Property:PotentialUrbanUtilityScalePVCapacity | Open Energy Informatio...

    Open Energy Info (EERE)

    Description The nameplate capacity technical potential from utility-scale PV in urban areas of a particular place. Use this property to express potential electric energy...

  8. Stable Free Radicals and Potential Implications for Health Effects...

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

    Stable Free Radicals and Potential Implications for Health Effects of Diesel Emissions Stable Free Radicals and Potential Implications for Health Effects of Diesel Emissions 2005 ...

  9. Indian Country Solar Energy Potential Estimates & DOE IE Updates

    Energy Savers [EERE]

    Financing Colton Heaps National Renewable Energy Laboratory 1 2 1 Potential 3 Refinement 5 Operations & Maintenance 2 Options 4 Implementation 3 Refinement Potential Options ...

  10. EFRC Creative Potential: Thinking Out of the Box | Center for...

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

    EFRC Creative Potential: Thinking Out of the Box 31 Mar 2014 Professor Petra Fromme is one ... Creative potential of different groups coming from different backgrounds..., the creative ...

  11. Webinar November 19: Potential Strategies for Integrating Solar...

    Office of Environmental Management (EM)

    Webinar November 19: Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis Webinar November 19: Potential Strategies for...

  12. Economic Potential of CHP in Detroit Edison Service Area: The...

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

    Economic Potential of CHP in Detroit Edison Service Area: The Customer Perspective, June 2003 Economic Potential of CHP in Detroit Edison Service Area: The Customer Perspective, ...

  13. Analysis of Burnup and Economic Potential of Alternative Fuel...

    Office of Scientific and Technical Information (OSTI)

    Analysis of Burnup and Economic Potential of Alternative Fuel Materials in Thermal Reactors Citation Details In-Document Search Title: Analysis of Burnup and Economic Potential of ...

  14. Property:PotentialOffshoreWindCapacity | Open Energy Information

    Open Energy Info (EERE)

    Property Type Quantity Description The nameplate capacity technical potential from Offshore Wind for a particular place. Use this property to express potential electric...

  15. Potential Induced Degradation (PID) Tests for Commercially Available...

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

    Potential Induced Degradation (PID) Tests for Commercially Available PV Modules Potential Induced Degradation (PID) Tests for Commercially Available PV Modules Presented at the PV ...

  16. Wind Concurrent Cooling Could Increase Power Transmission Potential...

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

    Concurrent Cooling Could Increase Power Transmission Potential by as Much as 40% Wind ... In areas where wind farms are being developed, there is potential to take advantage of ...

  17. Meeting Concerning Potential Test Procedures and Energy Conservation...

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

    Concerning Potential Test Procedures and Energy Conservation Standards for Set-Top Boxes and Network Equipment Meeting Concerning Potential Test Procedures and Energy Conservation ...

  18. The Market and Technical Potential for Combined Heat and Power...

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

    CommercialInstitutional Sector, January 2000 The Market and Technical Potential for ... and developed estimates of additional technical potential for CHP in these markets. ...

  19. The Market and Technical Potential for Combined Heat and Power...

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

    Industrial Sector, January 2000 The Market and Technical Potential for Combined Heat and ... and developed estimates of additional technical potential for CHP in industry. ...

  20. Dynamic Potential Intensity: An improved representation of the...

    Office of Scientific and Technical Information (OSTI)

    Dynamic Potential Intensity: An improved representation of the ocean's impact on tropical cyclones Citation Details In-Document Search Title: Dynamic Potential Intensity: An ...

  1. Property:PotentialEGSGeothermalCapacity | Open Energy Information

    Open Energy Info (EERE)

    Property Type Quantity Description The nameplate capacity technical potential from EGS Geothermal for a particular place. Use this property to express potential electric...

  2. NREL: Energy Efficiency Potential Mapping (Analysis & Tools for...

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

    Energy Efficiency Potential Mapping (Analysis & Tools for Building America and Industry - 2015 Peer Review NREL: Energy Efficiency Potential Mapping (Analysis & Tools for Building...

  3. EPA Clean Energy Incentive Program Stakeholder Calls - Potential...

    Energy Savers [EERE]

    Energy Incentive Program Stakeholder Calls - Potential CEIP Project Partners EPA Clean Energy Incentive Program Stakeholder Calls - Potential CEIP Project Partners November 23,...

  4. Chiral random matrix model at finite chemical potential: Characteristi...

    Office of Scientific and Technical Information (OSTI)

    model at finite chemical potential: Characteristic determinant and edge universality Prev Next Title: Chiral random matrix model at finite chemical potential: ...

  5. Potential Effect of Pollutantn Emissions on Global Warming: First...

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

    Potential Effect of Pollutantn Emissions on Global Warming: First Comparisong Using External Costs on Urban Buses Potential Effect of Pollutantn Emissions on Global Warming: First ...

  6. Carbon Emissions Reduction Potential in the US Chemicals and...

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

    Carbon Emissions Reduction Potential in the US Chemicals and Pulp and Paper Industries by Applying CHP Technologies, June 1999 Carbon Emissions Reduction Potential in the US ...

  7. Africa - Technical Potential of Solar Energy to Address Energy...

    Open Energy Info (EERE)

    - Technical Potential of Solar Energy to Address Energy Poverty and Avoid GHG Emissions Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Technical Potential of Solar...

  8. Potential Vulnerability of US Petroleum Refineries to Increasing...

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

    Potential Vulnerability of US Petroleum Refineries to Increasing Water Temperature andor Reduced Water Availability Potential Vulnerability of US Petroleum Refineries to ...

  9. Property:IdentifiedHydrothermalPotential | Open Energy Information

    Open Energy Info (EERE)

    ntifiedHydrothermalPotential Property Type Quantity Description Conventional hydrothermal electricity generation potential from identified hydrothermal sites, as determined by the...

  10. National and Sectoral GHG Mitigation Potential: A Comparison...

    Open Energy Info (EERE)

    and Sectoral GHG Mitigation Potential: A Comparison Across Models Jump to: navigation, search Tool Summary LAUNCH TOOL Name: National and Sectoral GHG Mitigation Potential: A...

  11. Energy Recovery Potential from Wastewater Utilities through Innovation...

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

    Recovery Potential from Wastewater Utilities through Innovation Energy Recovery Potential from Wastewater Utilities through Innovation Breakout Session 3A-Conversion Technologies ...

  12. Combined Heat and Power Market Potential for Opportunity Fuels...

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

    Combined Heat and Power Market Potential for Opportunity Fuels, August 2004 Combined Heat and Power Market Potential for Opportunity Fuels, August 2004 The purpose of this 2004...

  13. Assessment of Energy Production Potential from Ocean Currents...

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

    Assessment of Energy Production Potential from Ocean Currents along the United States Coastline Assessment of Energy Production Potential from Ocean Currents along the United...

  14. Quantification of the Potential Gross Economic Impacts of Five...

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

    Quantification of the Potential Gross Economic Impacts of Five Methane Reduction Scenarios Quantification of the Potential Gross Economic Impacts of Five Methane Reduction Scenarios ...

  15. Light-Duty Diesel Market Potential in North America | Department...

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

    Market Potential in North America Light-Duty Diesel Market Potential in North America 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations and Posters PDF icon ...

  16. NREL: Energy Efficiency Potential Mapping (Analysis & Tools for...

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

    Energy Efficiency Potential Mapping (Analysis & Tools for Building America and Industry - 2015 Peer Review NREL: Energy Efficiency Potential Mapping (Analysis & Tools for Building ...

  17. Pilgrim's Progress: An Update on Geothermal Potential in Alaska...

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

    Pilgrim's Progress: An Update on Geothermal Potential in Alaska Pilgrim's Progress: An Update on Geothermal Potential in Alaska November 20, 2014 - 4:32pm Addthis Sunrise at ...

  18. High Power Laser Innovation Sparks Geothermal Power Potential...

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

    High Power Laser Innovation Sparks Geothermal Power Potential High Power Laser Innovation Sparks Geothermal Power Potential May 29, 2015 - 11:02am Addthis The Energy Department's ...

  19. RADIOACTIVE WASTE STREAMS FROM VARIOUS POTENTIAL NUCLEAR FUEL...

    Office of Scientific and Technical Information (OSTI)

    FROM VARIOUS POTENTIAL NUCLEAR FUEL CYCLE OPTIONS Citation Details In-Document Search Title: RADIOACTIVE WASTE STREAMS FROM VARIOUS POTENTIAL NUCLEAR FUEL CYCLE OPTIONS Five ...

  20. Thailand-Status and Potential for the Development of Biofuels...

    Open Energy Info (EERE)

    Status and Potential for the Development of Biofuels and Rural Renewable Energy Jump to: navigation, search Name Thailand-Status and Potential for the Development of Biofuels and...

  1. DOE Requests Information on Potential New or Revised Categorical...

    Energy Savers [EERE]

    DOE Requests Information on Potential New or Revised Categorical Exclusions DOE Requests Information on Potential New or Revised Categorical Exclusions December 22, 2009 - 10:33am...

  2. EA-1927: Paducah Gaseous Diffusion Plant Potential Land and Facilities...

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

    Gaseous Diffusion Plant Potential Land and Facilities Transfers; McCracken County, Kentucky EA-1927: Paducah Gaseous Diffusion Plant Potential Land and Facilities Transfers; ...

  3. Project Profile: Solar Power Tower Improvements with the Potential...

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

    Solar Power Tower Improvements with the Potential to Reduce Costs Project Profile: Solar Power Tower Improvements with the Potential to Reduce Costs Pratt Whitney Rocketdyne logo ...

  4. Pennsylvania: New Series of Windows Has Potential to Save Energy...

    Office of Environmental Management (EM)

    New Series of Windows Has Potential to Save Energy for Commercial Buildings Pennsylvania: New Series of Windows Has Potential to Save Energy for Commercial Buildings March 6, 2014...

  5. The Potential Benefits of Distributed Generation and the Rate...

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

    Issues That May Impede Its Expansion The Potential Benefits of Distributed Generation and the Rate-Related Issues That May Impede Its Expansion The Potential Benefits ...

  6. CL-20 Reactivity in the Subsurface Environment and Potential...

    Office of Scientific and Technical Information (OSTI)

    and Potential for Migration Citation Details In-Document Search Title: CL-20 Reactivity in the Subsurface Environment and Potential for Migration Hexanitrohexaazaisowurtzit...

  7. Potential Impacts of Hydrokinetic and Wave Energy Conversion...

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

    Potential Impacts of Hydrokinetic and Wave Energy Conversion Technologies on Aquatic Environments The article reviews the results of that workshop, focusing on potential effects on ...

  8. Home Energy Score Program: Update and Overview for Potential...

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

    for Potential Partners Home Energy Score Program: Update and Overview for Potential Partners Provides an overview of DOE's objectives for the Home Energy Score program ...

  9. Unlocking the Potential of Additive Manufacturing in the Fuel...

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

    Unlocking the Potential of Additive Manufacturing in the Fuel Cells Industry Unlocking the Potential of Additive Manufacturing in the Fuel Cells Industry Download presentation...

  10. Energy Saving Potentials and Air Quality Benefits of Urban Heat...

    Office of Scientific and Technical Information (OSTI)

    Conference: Energy Saving Potentials and Air Quality Benefits of Urban Heat Island Mitigation Citation Details In-Document Search Title: Energy Saving Potentials and Air Quality ...

  11. Comprehensive Evaluation of the Geothermal Potential within the...

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

    Comprehensive Evaluation of the Geothermal Potential within the Pyramid Lake Paiute Reservation Comprehensive Evaluation of the Geothermal Potential within the Pyramid Lake Paiute ...

  12. OTEC: status and potential of private funding

    SciTech Connect (OSTI)

    Francis, E.J.; Richards, D.

    1982-01-01

    A financial analysis approach is described for calculating net present values and financial management rates of return for a wide variety of specific OTEC cases. Comparisons are made of the profit potentials, expected market penetration, perceived financial risks, and eventual benefits from the specific cases and logical follow-on construction scenarios. The principal factors of uncertainty as perceived by researchers, builders, and financiers are catalogued. Roles and responsibilities of participants in a financing approach including builder team, government, product user, financial houses, and investors are cited. Cases which have been investigated include 10 to 40 MW/sub e/ scale and 250 to 360 MW/sub e/ scale OTEC plants and plantships; electric power cabled ashore to US islands and the US mainland, methanol, ammonia, hybrid geothermal-OTEC plants for meeting local power demands or making products; and relevant data on other OTEC product possibilities.

  13. Potential nuclear safeguards applications for neutron generators

    SciTech Connect (OSTI)

    Lindquist, L.O.

    1980-01-01

    Many nuclear safeguards inspection instruments use neutron sources to interrogate the fissile material (commonly /sup 235/U and /sup 239/Pu) to be measured. The neutron sources currently used in these instruments are isotopics such as Californium-252, Americium-Lithium, etc. It is becoming increasingly more difficult to transport isotopic sources from one measurement location to another. This represents a significant problem for the International Atomic Energy Agency (IAEA) safeguards inspectors because they must take their safeguards instruments with them to each nuclear installation to make an independent measurement. Purpose of this paper is to review the possibility of replacing isotopic neutron sources now used in IAEA safeguards instruments with electric neutron sources such as deuterium-tritium (D-T, 14-MeV neutrons) or deuterium-deuterium (D-D, 2-MeV neutrons). The potential for neutron generators to interrogate spent-light water reactor fuel assemblies in storage pools is also reviewed.

  14. Evaluation of liquefaction potential for building code

    SciTech Connect (OSTI)

    Nunziata, C.; De Nisco, G.; Panza, G. F.

    2008-07-08

    The standard approach for the evaluation of the liquefaction susceptibility is based on the estimation of a safety factor between the cyclic shear resistance to liquefaction and the earthquake induced shear stress. Recently, an updated procedure based on shear-wave velocities (V{sub s}) has been proposed which could be more easily applied.These methods have been applied at La Plaja beach of Catania, that experienced liquefaction because of the 1693 earthquake. The detailed geotechnical and V{sub s} information and the realistic ground motion computed for the 1693 event let us compare the two approaches. The successful application of the V{sub s} procedure, slightly modified to fit historical and safety factor information, even if additional field performances are needed, encourages the development of a guide for liquefaction potential analysis, based on well defined V{sub s} profiles to be included in the italian seismic code.

  15. Cogeneration development and market potential in China

    SciTech Connect (OSTI)

    Yang, F.; Levine, M.D.; Naeb, J.; Xin, D.

    1996-05-01

    China`s energy production is largely dependent on coal. China currently ranks third in global CO{sub 2} emissions, and rapid economic expansion is expected to raise emission levels even further in the coming decades. Cogeneration provides a cost-effective way of both utilizing limited energy resources and minimizing the environmental impacts from use of fossil fuels. However, in the last 10 years state investments for cogeneration projects in China have dropped by a factor of 4. This has prompted this study. Along with this in-depth analysis of China`s cogeneration policies and investment allocation is the speculation that advanced US technology and capital can assist in the continued growth of the cogeneration industry. This study provides the most current information available on cogeneration development and market potential in China.

  16. Self-potential observations during hydraulic fracturing

    SciTech Connect (OSTI)

    Moore, Jeffrey R.; Glaser, Steven D.

    2007-09-13

    The self-potential (SP) response during hydraulic fracturing of intact Sierra granite was investigated in the laboratory. Excellent correlation of pressure drop and SP suggests that the SP response is created primarily by electrokinetic coupling. For low pressures, the variation of SP with pressure drop is linear, indicating a constant coupling coefficient (Cc) of -200 mV/MPa. However for pressure drops >2 MPa, the magnitude of the Cc increases by 80% in an exponential trend. This increasing Cc is related to increasing permeability at high pore pressures caused by dilatancy of micro-cracks, and is explained by a decrease in the hydraulic tortuosity. Resistivity measurements reveal a decrease of 2% prior to hydraulic fracturing and a decrease of {approx}35% after fracturing. An asymmetric spatial SP response created by injectate diffusion into dilatant zones is observed prior to hydraulic fracturing, and in most cases this SP variation revealed the impending crack geometry seconds before failure. At rupture, injectate rushes into the new fracture area where the zeta potential is different than in the rock porosity, and an anomalous SP spike is observed. After fracturing, the spatial SP distribution reveals the direction of fracture propagation. Finally, during tensile cracking in a point load device with no water flow, a SP spike is observed that is caused by contact electrification. However, the time constant of this event is much less than that for transients observed during hydraulic fracturing, suggesting that SP created solely from material fracture does not contribute to the SP response during hydraulic fracturing.

  17. Advanced HD Engine Systems and Emissions Control Modeling and...

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

    Meeting PDF icon vss089daw2012p.pdf More Documents & Publications Evaluation of 2010 Urea-SCR Technology for Hybrid Vehicles using PSAT System Simulations Vehicle Technologies ...

  18. Advanced HD Engine Systems and Emissions Control Modeling and Analysis

    Broader source: Energy.gov [DOE]

    2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

  19. Fuel economy and emissions reduction of HD hybrid truck over...

    Broader source: Energy.gov (indexed) [DOE]

    Systems Simulation and Testing Annual Progress Report Vehicle Technologies Office Merit Review 2014: Advanced Heavy-Duty Engine Systems and Emissions Control Modeling and Analysis

  20. hd_hydrogen_2007.xls | Department of Energy

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

    More Documents & Publications Santa Clara Valley Transportation Authority and San Mateo County Transit District -- Fuel Cell Transit Buses: Evaluation Results Joint Fuel Cell Bus ...

  1. HD Truck and Engine Fuel Efficiency Opportunities and Challenges Post

    Broader source: Energy.gov (indexed) [DOE]

    EPA2010 | Department of Energy The key to successful commercialization of clean and efficient ICEs is technology integration to meet customer expectations at cost, quality, timing, and reliability PDF icon deer09_lei.pdf More Documents & Publications Supertruck - Development and Demonstration of a Fuel-Efficient Class 8 Tractor & Trailer Comments of Tendril Networks Inc SuperTruck … Development and Demonstration of a Fuel-Efficient Class 8 Tractor & Trailer

  2. HD Applications of Significantly Downsized SI Engines Using Alcohol...

    Broader source: Energy.gov (indexed) [DOE]

    Direct injection of a second fuel (ethanol or methanol) is explored as a means of avoiding knock in turbocharged, high-compression ratio spark-ignited engines that could replace ...

  3. Fuel Efficiency of New European HD Vehicles | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    erkkila.pdf More Documents & Publications Long-term Decline of Aggregate Fuel Use per Cargo-ton-mile of Commercial Trucking; A Key Enabler of Expanded U.S. Trade and Economic Growth Fuel-Borne Catalyst Assisted DPF regeneration on a Renault truck MD9 Engine Outfitted with SCR Multicylinder Diesel Engine Design for HCCI Operation

  4. Pumped Storage and Potential Hydropower from Conduits | Department of

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

    Energy Pumped Storage and Potential Hydropower from Conduits Pumped Storage and Potential Hydropower from Conduits This U.S. Department of Energy Report to Congress, Pumped Storage Hydropower and Potential Hydropower from Conduits, addresses the technical flexibility that existing pumped storage facilities can provide to support intermittent renewable energy generation. This study considered potential upgrades or retrofit of these facilities, the technical potential of existing and new

  5. Potential of Securitization in Solar PV Finance

    SciTech Connect (OSTI)

    Lowder, T.; Mendelsohn, M.

    2013-12-01

    This report aims to demonstrate, hypothetically and at a high level, what volumes of solar deployment could be supported given solar industry access to the capital markets in the form of security issuance. Securitization is not anticipated to replace tax equity in the near- to mid-term, but it could provide an additional source of funds that would be comparatively inexpensive and could reduce the weighted average cost of capital for a given solar project or portfolio. Thus, the potential to securitize solar assets and seek financing in the capital markets could help to sustain the solar industry when the investment tax credit (ITC) -- one of the federal incentives that has leveraged billions of dollars of private capital in the solar industry -- drops from 30% to 10% at the close of 2016. The report offers analysis on the size of the U.S. third-party financed solar market, as well as on the volumes (in MW) of solar asset origination possible through a $100 million securitization fund (assuming no overcollateralization). It also provides data on the size of the relevant securities markets and how the solar asset class may fit into these markets.

  6. Current-potential characteristics of electrochemical systems

    SciTech Connect (OSTI)

    Battaglia, V.S.

    1993-07-01

    This dissertation contains investigations in three distinct areas. Chapters 1 and 2 provide an analysis of the effects of electromagnetic phenomena during the initial stages of cell discharge. Chapter 1 includes the solution to Maxwell`s equations for the penetration of the axial component of an electric field into an infinitely long cylindrical conductor. Chapter 2 contains the analysis of the conductor included in a radial circuit. Chapter 3 provides a complete description of the equations that describe the growth of an oxide film. A finite difference program was written to solve the equations. The system investigated is the iron/iron oxide in a basic, aqueous solution. Chapters 4 and 5 include the experimental attempts for replacing formaldehyde with an innocuous reducing agent for electroless deposition. In chapter 4, current-versus-voltage curves are provided for a sodium thiosulfate bath in the presence of a copper disk electrode. Also provided are the cathodic polarization curves of a copper/EDTA bath in the presence of a copper electrode. Chapter 5 contains the experimental results of work done with sodium hypophosphite as a reducing agent. Mixed-potential-versus-time curves for solutions containing various combinations of copper sulfate, nickel chloride, and hypophosphite in the presence of a palladium disk electrode provide an indication of the reducing power of the solutions.

  7. FEL potential of eRHIC

    SciTech Connect (OSTI)

    Litvinenko, V.N.; Ben-Zvi, I.; Hao, Y.; Kao, C-C.; Kayran, D.; Murphy, J.B.; Ptitsyn, V.; Trbojevic, D.; Tsoupas, N.

    2010-08-23

    Brookhaven National Laboratory plans to build a 5-to-30 GeV energy-recovery linac (ERL) for its future electron-ion collider, eRHIC. In past few months, the Laboratory turned its attention to the potential of this unique machine for free electron lasers (FELS), which we initially assessed earlier. In this paper, we present our current vision of a possible FEL farm, and of narrow-band FEL-oscillators driven by this accelerator. eRHIC, the proposed electron-ion collider at BNL, takes advantage of the existing Relativistic Heavy Ion Collider (RHIC) complex. Plans call for adding a six-pass super-conducting (SRF) ERL to this complex to collide polarized- and unpolarized- electron beams with heavy ions (with energies up to 130 GeV per nucleon) and with polarized protons (with energies up to 325 GeV). RHIC, with a circumference of 3.834 km, has three-fold symmetry and six straight sections each {approx} 250 m long. Two of these straight sections will accommodate 703-MHz SRF linacs. The maximum energy of the electron beam in eRHIC will be reached in stages, from 5 GeV to 30 GeV, by increasing the lengths of its SRF linacs. We plan to install at the start the six-pass magnetic system with small gap magnets. The structure of the eRHIC's electron beam will be identical with that of its hadron beam, viz., 166 bunches will be filled, reserving about a one-microsecond gap for the abort kicker. With modest modifications, we can assure that eRHIC's ERL will become an excellent driver for continuous wave (CW) FELs (see Fig.1). The eRHIC's beam structure will support the operation of several such FELs in parasitic mode.

  8. Advanced Natural Gas Engine Technology for Heavy Duty Vehicles...

    Broader source: Energy.gov (indexed) [DOE]

    of HD vehicle applications. PDF icon deer09kamel.pdf More Documents & Publications Light-Duty Diesel Market Potential in ... Meet Future Exhaust Emission Limits Advances in ...

  9. 2014 Directory of Potential Stakeholders for DOE Actions under...

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

    2014 Directory of Potential Stakeholders for DOE Actions under NEPA Issued 2014 Directory of Potential Stakeholders for DOE Actions under NEPA Issued July 7, 2014 - 5:02pm Addthis ...

  10. Renormalization of the Brazilian chiral nucleon-nucleon potential

    SciTech Connect (OSTI)

    Da Rocha, Carlos A.; Timoteo, Varese S.

    2013-03-25

    In this work we present a renormalization of the Brazilian nucleon-nucleon (NN) potential using a subtractive method. We show that the exchange of correlated two pion is important for isovector channels, mainly in tensor and central potentials.

  11. Directory of Potential Stakeholders for DOE Actions under NEPA

    Office of Energy Efficiency and Renewable Energy (EERE)

    DOE Offices are encouraged to be inclusive in providing potentially interested parties with opportunities to review NEPA documents.  This Directory of Potential Stakeholders for DOE Actions under...

  12. Reception of longitudinal vector potential radiation with a plasma antenna

    SciTech Connect (OSTI)

    Zimmerman, Robert K. Jr.

    2013-07-28

    To help resolve the long-running debate between physicists and engineers regarding the existence of the magnetic vector potential, herewith we describe an experiment demonstrating reception of time-harmonic vector potential radiation at 1.3 GHz.

  13. Photoinduced changes of the chemical potential in superconducting...

    Office of Scientific and Technical Information (OSTI)

    Photoinduced changes of the chemical potential in superconducting Bi 2 Sr 2 CaCu 2 O 8 + ... Title: Photoinduced changes of the chemical potential in superconducting Bi 2 Sr 2 CaCu 2 ...

  14. Geothermal Discovery Offers Hope for More Potential Across the...

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

    Discovery Offers Hope for More Potential Across the Country Geothermal Discovery Offers Hope for More Potential Across the Country October 17, 2012 - 12:50pm Addthis The solution...

  15. Factorization method and new potentials from the inverted oscillator

    SciTech Connect (OSTI)

    Bermudez, David Fernndez C, David J.

    2013-06-15

    In this article we will apply the first- and second-order supersymmetric quantum mechanics to obtain new exactly-solvable real potentials departing from the inverted oscillator potential. This system has some special properties; in particular, only very specific second-order transformations produce non-singular real potentials. It will be shown that these transformations turn out to be the so-called complex ones. Moreover, we will study the factorization method applied to the inverted oscillator and the algebraic structure of the new Hamiltonians. -- Highlights: We apply supersymmetric quantum mechanics to the inverted oscillator potential. The complex second-order transformations allow us to build new non-singular potentials. The algebraic structure of the initial and final potentials is analyzed. The initial potential is described by a complex-deformed HeisenbergWeyl algebra. The final potentials are described by polynomial Heisenberg algebras.

  16. Potential Federal On-Site Solar Aggregation in Washington, D...

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

    Potential Federal On-Site Solar Aggregation in Washington, D.C., and Maryland Potential Federal On-Site Solar Aggregation in Washington, D.C., and Maryland Presentation describes...

  17. Obama Officials Announce Steps to Promote the Clean Energy Potential...

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

    Obama Officials Announce Steps to Promote the Clean Energy Potential of the West Obama Officials Announce Steps to Promote the Clean Energy Potential of the West June 15, 2009 -...

  18. File:CV TidePotential.pdf | Open Energy Information

    Open Energy Info (EERE)

    CV TidePotential.pdf Jump to: navigation, search File File history File usage Cape Verde-Map Summarizing Tide Potential Size of this preview: 776 600 pixels. Full resolution...

  19. Energy Department Releases Report, Evaluates Potential for Wind...

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

    Report, Evaluates Potential for Wind Power in All 50 States Energy Department Releases Report, Evaluates Potential for Wind Power in All 50 States May 19, 2015 - 11:38am Addthis ...

  20. Potential Role of Concentrating Solar Power in Enabling High...

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

    Potential Role of Concentrating Solar Power in Enabling High Renewables Scenarios in the ... DE-AC36-08GO28308 The Potential Role of Concentrating Solar Power in Enabling High ...

  1. Renewable Energy Potential for Brownfield Redevelopment Strategies (Poster)

    SciTech Connect (OSTI)

    Mosey, G.

    2006-11-01

    This poster, submitted for the Brownfields 2006 conference, discusses the renewable energy potential for brownfield redevelopment strategies.

  2. DOE Releases Updated Directory of Potential Stakeholders | Department of

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

    Energy Releases Updated Directory of Potential Stakeholders DOE Releases Updated Directory of Potential Stakeholders July 29, 2015 - 2:54pm Addthis DOE Offices are encouraged to be inclusive in providing potentially interested parties with opportunities to review NEPA documents. The Directory of Potential Stakeholders for DOE Actions under NEPA, updated in July, 2015, is primarily intended to supplement lists that Departmental Offices compile for individual projects or facilities. It

  3. Alaska Harbors Geothermal Energy Potential | Department of Energy

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

    Alaska Harbors Geothermal Energy Potential Alaska Harbors Geothermal Energy Potential January 10, 2014 - 12:00am Addthis Alaska Harbors Geothermal Energy Potential Leveraging historical investments in innovative exploration technologies from the U.S. Department of Energy, a study released yesterday from the USGS estimates a potential 29 MW of geothermal energy - €nearly ten times higher than estimates from the 1980s - €beneath Akutan Volcano. Energy from this active volcano, nestled in the

  4. Switchgrass as a High-Potential Energy Crop

    Broader source: Energy.gov [DOE]

    Historical Perspective on How and Why Switchgrass was Selected as a “Model” High-Potential Energy Crop

  5. Property:UndiscoveredHydrothermalPotential | Open Energy Information

    Open Energy Info (EERE)

    Property Type Quantity Description Estimated conventional hydrothermal electricity generation potential from undiscovered hydrothermal sites, as determined by...

  6. Deformation potentials of CdSe quantum dots

    SciTech Connect (OSTI)

    Li, Jingbo; Wang, Lin-Wang

    2004-06-02

    The size dependent deformation potentials of CdSe quantum dots are studied by first principle and semi-empirical pseudopotentials calculations. They find that the amplitude of the quantum dot deformation potential is only slightly larger than the bulk value, and this increase is mostly caused by the off {Lambda} point deformation potentials in the bulk, which are larger in amplitude than the {Lambda} point deformation potential.

  7. Canadian Wind Energy Atlas Potential Website | Open Energy Information

    Open Energy Info (EERE)

    URI: cleanenergysolutions.orgcontentcanadian-wind-energy-atlas-potential- Language: English Policies: Deployment Programs DeploymentPrograms: Technical Assistance...

  8. Assessment of Achievable Potential from Energy Efficiency and...

    Open Energy Info (EERE)

    URI: cleanenergysolutions.orgcontentassessment-achievable-potential-energ Language: English Policies: Regulations Regulations: MandatesTargets This report discusses...

  9. Thermodynamic Evaluation of Low-Global Warming Potential Refrigerants...

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

    More Documents & Publications Credit: National Institute of Standards Thermodynamic Evaluation of Low-Global Warming Potential Refrigerants Research & Development Roadmap: ...

  10. Feasibility study of Northeast Thailand Gas Pipeline Project. Final report. Part 2. Compressed natural gas. Export trade information

    SciTech Connect (OSTI)

    Not Available

    1989-09-01

    The volume is the second part of a three part study submitted to the Petroleum Authority of Thailand. Part II analyzes the potential use of compressed natural gas (CNG) as a transportation fuel for high mileage vehicles traveling the highway system of Thailand. The study provides an initial estimate of buses and trucks that are potential candidates for converting to natural gas vehicles (NGV). CNG technology is briefly reviewed. The types of refueling stations that may be sited along the highway are discussed. The estimated capital investments and typical layouts are presented. The report also discusses the issues involved in implementing a CNG program in Thailand, such as safety, user acceptability and the government's role.

  11. Potential Impacts of Hydrokinetic and Wave Energy Conversion Technologies

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

    on Aquatic Environments | Department of Energy Potential Impacts of Hydrokinetic and Wave Energy Conversion Technologies on Aquatic Environments Potential Impacts of Hydrokinetic and Wave Energy Conversion Technologies on Aquatic Environments The article reviews the results of that workshop, focusing on potential effects on freshwater, estuarine, and marine ecosystems, and we describe recent national and international developments. PDF icon

  12. ARM Convective Available Potential Energy (CAPE), Convective Inhibition

    Office of Scientific and Technical Information (OSTI)

    (CIN) Product (Dataset) | Data Explorer Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) Product Title: ARM Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) Product ARM soundings are used to determine Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) and associated properties, using the following relationships; Authors: Jensen, Michael Publication Date: 2014-04-10 OSTI Identifier: 1127238 DOE Contract Number:

  13. Characterization of the Potential Hazards Associated with Potential RCRA Treatment Noncompliances

    SciTech Connect (OSTI)

    Clark, David Lewis

    2015-08-20

    The purpose of this document is to provide a hazard evaluation of the noncompliances and whether any new actions are required to mitigate potential risk to the worker or the public. In short, we have reviewed the noncompliances and have concluded that the possibility of exothermic reactions leading to radioactive release is not credible, and in one case, inconceivable, stemming from the fact that the majority fraction of the waste is compatible with organic absorbents and neutralizers. It is not expected that the noncompliances would generate or produce uncontrolled flammable fumes, gases, extreme heat, pressure, fire, explosions, or violent reactions.

  14. Modified biochemical methane potential (BMP) assays to assess biodegradation potential of landfilled refuse

    SciTech Connect (OSTI)

    Bogner, J.E.; Rose, C.; Piorkowski, R.

    1989-01-01

    Modified Biochemical Methane Potential (BMP) assays were used to assess biogas production potential of solid landfill samples. In landfill samples with visible soil content, moisture addition alone was generally as effective at stimulating biogas production as the addition of a comprehensive nutrient media. In a variety of samples from humid and semiarid landfills, addition of an aqueous nutrient media was the most effective stimulant for biogas production; however, moisture addition was almost as effective for most samples, suggesting that water addition would be the most cost-effective field approach. Onset of methanogenesis was slower in fresh refuse samples (even when inoculated with anaerobic digester sludge) than in landfill samples, indicating that the soil into which materials are landfilled is a major source of microorganisms. High volatile solids loading in fresh refuse and landfill assays retarded methanogenesis. A comparison of anaerobic and aerobic sample handling techniques showed no significant differences with regard to onset of methanogenesis and total gas production. The technique shows initial promise with regard to replication and reproducibility of results and could be a meaningful addition to landfill site evaluations where commercial gas recovery is anticipated. The BMP technique could also be adapted to assess anaerobic biodegradability of other solid waste materials for conventional anaerobic digestion applications. 9 refs., 6 figs., 2 tabs.

  15. Webinar January 21: Potential Strategies for Integrating Solar Hydrogen

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

    Production and Concentrating Solar Power: A Systems Analysis | Department of Energy 1: Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis Webinar January 21: Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis January 14, 2016 - 12:00pm Addthis The Energy Department will present a live webinar titled "Potential Strategies for Integrating Solar Hydrogen Production

  16. Market Potential for Advanced Thermally Activated BCHP in Five National

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

    Account Sectors, May 2003 | Department of Energy Market Potential for Advanced Thermally Activated BCHP in Five National Account Sectors, May 2003 Market Potential for Advanced Thermally Activated BCHP in Five National Account Sectors, May 2003 Potential distributed generation (DG) and combined heat and power (CHP) applications in the United States cover a broad spectrum of market segments, from nursing homes requiring a few hundred kilowatts (kW) of power and an economical hot water source

  17. New Reports Highlight Major Potential in Offshore Wind Energy | Department

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

    of Energy Reports Highlight Major Potential in Offshore Wind Energy New Reports Highlight Major Potential in Offshore Wind Energy August 29, 2014 - 12:53pm Addthis The Energy Department today announced a new report showing steady progress for the U.S. offshore wind energy industry over the past year. The report highlights 14 projects in advanced stages of development, together representing nearly 4,900 megawatts (MW) of potential offshore wind energy capacity for the United States. Further,

  18. Quantification of the Potential Impact on Commercial Markets of DOE's

    Energy Savers [EERE]

    Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012, and 2013 | Department of Energy , and 2013 Quantification of the Potential Impact on Commercial Markets of DOE's Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012, and 2013 Quantification of the Potential Impact on Commercial Markets of DOE's Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012, and 2013 PDF icon 4.6_ERI_2142_07_1001_DOE_Potential_Market_Impact_Dec2010.pdf

  19. JASON Study Highlights Huge Potential for EGS | Department of Energy

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

    JASON Study Highlights Huge Potential for EGS JASON Study Highlights Huge Potential for EGS February 26, 2014 - 12:00am Addthis A new study commissioned by the Energy Department's Geothermal Technologies Office (GTO) highlights the vast potential for enhanced geothermal systems (EGS) to provide clean, reliable, and sustainable energy to American homes and businesses.The conclusions of the JASON study support GTO's long-term strategic trajectory for EGS development, which includes using EGS at

  20. State of Washington Clean Energy Opportunity: Technical Market Potential

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

    for CHP, August 2010 | Department of Energy of Washington Clean Energy Opportunity: Technical Market Potential for CHP, August 2010 State of Washington Clean Energy Opportunity: Technical Market Potential for CHP, August 2010 The State of Washington has significant clean energy technical market potential including clean heat and power (CHP)/cogeneration, waste heat recovery for power and heat, and district energy. This brief white paper by the Northwest Clean Energy Application Center (NW

  1. Potential synergy: the thorium fuel cycle and rare earths processing

    Office of Scientific and Technical Information (OSTI)

    (Conference) | SciTech Connect Conference: Potential synergy: the thorium fuel cycle and rare earths processing Citation Details In-Document Search Title: Potential synergy: the thorium fuel cycle and rare earths processing The use of thorium in nuclear power programs has been evaluated on a recurring basis. A concern often raised is the lack of 'thorium infrastructure'; however, for at least a part of a potential thorium fuel cycle, this may less of a problem than previously thought.

  2. Potential partnerships and funding from a variety of sources

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

    Potential partnerships and funding from a variety of sources Alumni Link: Opportunities, News and Resources for Former Employees Latest Issue:September 2015 all issues All Issues » submit Potential partnerships and funding from a variety of sources Find a funding opportunity from current opportunities. July 1, 2015 Potential partnerships and funding from a variety of sources Find a funding opportunity from current opportunities. Contact Linda Anderman Email An evolving list of funding

  3. Energy Recovery Potential from Wastewater Utilities through Innovation |

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

    Department of Energy Recovery Potential from Wastewater Utilities through Innovation Energy Recovery Potential from Wastewater Utilities through Innovation Breakout Session 3A-Conversion Technologies III: Energy from Our Waste (Will we Be Rich in Fuel or Knee Deep in Trash by 2025?) Energy Recovery Potential from Wastewater Utilities through Innovation Lauren Fillmore, Senior Program Director, Water Environment Research Foundation PDF icon fillmore_biomass_2014.pdf More Documents &

  4. Assessment of Energy Production Potential from Tidal Streams...

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

    Assessment of Energy Production Potential from Tidal Streams in the United States The project documented in this report created a national database of tidal stream energy ...

  5. Energy Savings Potential and RD&D Opportunities for Commercial...

    Energy Savers [EERE]

    Energy Savings Potential and RD&D Opportunities for Commercial Refrigration This report documents the energy consumption of commercial refrigeration equipment (CRE) in the U.S. and ...

  6. Potential for the Use of Energy Savings Performance Contracts...

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

    the Use of Energy Savings Performance Contracts to Reduce Energy Consumption and Provide Energy and Cost Savings in Non-Building Applications Potential for the Use of Energy ...

  7. Integrated Evaluation of Cost, Emissions, and Resource Potential...

    Office of Scientific and Technical Information (OSTI)

    Integrated Evaluation of Cost, Emissions, and Resource Potential for Algal Biofuels at the National Scale Citation Details In-Document Search Title: Integrated Evaluation of Cost, ...

  8. September 25 Webinar to Highlight Potential Tribal and Utility...

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

    Eastern Time. "The future utility's resource portfolio will likely be a hybrid of ... Randy Manion, Renewable Energy Program Manager at WAPA. "A potential byproduct of that ...

  9. Potential partnerships and funding from a variety of sources

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

    Potential partnerships and funding from a variety of sources Alumni Link: Opportunities, News and Resources for Former Employees Latest Issue:September 2015 all issues All Issues...

  10. Real-space formulation of the electrostatic potential and total...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Real-space formulation of the electrostatic potential and total energy of solids Citation Details In-Document Search Title: Real-space formulation of the ...

  11. Report to Congress on the Potential Environmental Effects of...

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

    This report focuses on potential impacts of marine and hydrokinetic technologies to aquatic environments (i.e. rivers, estuaries, and oceans), fish and fish habitats, ecological ...

  12. Design Potential of Metal Foil Substrates for Optimized DOC Performanc...

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

    Design Potential of Metal Foil Substrates for Optimized DOC Performance Poster presentation at the 2007 Diesel Engine-Efficiency & Emissions Research Conference (DEER 2007). 13-16 ...

  13. NREL Report Estimates Market Potential of Shared Solar and Discusses...

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

    Report Estimates Market Potential of Shared Solar and Discusses Relevant Securities Regulations April 27, 2015 Analysis from the Energy Department's National Renewable Energy ...

  14. Potential Economic Impact of Constructing and Operating Solar...

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

    * NRELSR-550-35037 The Potential Economic Impact of Constructing and Operating Solar Power Generation Facilities in Nevada R. K. Schwer and M. Riddel Center for Business and ...

  15. NREL Assembles Industry Group to Explore Solar Lending Potential...

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

    Assembles Industry Group to Explore Solar Lending Potential May 7, 2014 Increasingly, banks, credit unions, and other lenders are beginning to offer loan products to homeowners and ...

  16. Unlocking Our Nation's Wind Potential | Department of Energy

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

    Unlocking Our Nation's Wind Potential Unlocking Our Nation's Wind Potential May 19, 2015 - 9:45am Addthis New map shows how taller wind turbines could help unlock wind's potential in all 50 states, especially in the southeastern U.S. | Map courtesy of National Renewable Energy Laboratory. New map shows how taller wind turbines could help unlock wind's potential in all 50 states, especially in the southeastern U.S. | Map courtesy of National Renewable Energy Laboratory. Key points Wind is a key

  17. Low Carbon Growth: a Potential Path for Mexico - GHG Abatement...

    Open Energy Info (EERE)

    "ESMAP Low Carbon Growth Country Studies Program" Retrieved from "http:en.openei.orgwindex.php?titleLowCarbonGrowth:aPotentialPathforMexico-GHGAbatementCostCurve&...

  18. Assessment of Energy Savings Potential from the Use of Demand...

    Office of Scientific and Technical Information (OSTI)

    Energy Savings Potential from the Use of Demand Controlled Ventilation in General Office Spaces in California Citation Details In-Document Search Title: Assessment of Energy ...

  19. Economic Systems Modeling for Laser IFE and the Potential advantages...

    Office of Scientific and Technical Information (OSTI)

    Conference: Economic Systems Modeling for Laser IFE and the Potential advantages of Fast Ignition Citation Details In-Document Search Title: Economic Systems Modeling for Laser IFE ...

  20. NREL: Technology Transfer - New NREL Report Showcases Potential...

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

    New NREL Report Showcases Potential of Domestic Offshore Wind Industry October 5, 2015 Several researchers at the National Wind Technology Center at the National Renewable Energy...

  1. Property:PotentialOffshoreWindGeneration | Open Energy Information

    Open Energy Info (EERE)

    Property Type Quantity Description The estimated potential energy generation from Offshore Wind for a particular place. Use this type to express a quantity of energy. The...

  2. Energy Recovery Potential from Wastewater Utilities through Innovation

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

    we Be Rich in Fuel or Knee Deep in Trash by 2025? July 30, ... Utilities - Industry - Engineering & Consulting Firms - ... Water Resource Recovery Facility What is the potential to ...

  3. Active Fault Segments As Potential Earthquake Sources- Inferences...

    Open Energy Info (EERE)

    Segments As Potential Earthquake Sources- Inferences From Integrated Geophysical Mapping Of The Magadi Fault System, Southern Kenya Rift Jump to: navigation, search OpenEI...

  4. Summary of geology of Colorado related to geothermal potential...

    Open Energy Info (EERE)

    Journal Article: Summary of geology of Colorado related to geothermal potential Author L.T. Grose Published Journal Colorado Geological Survey Bulletin, 1974 DOI Not Provided...

  5. Potential of High-Throughput Experimentation with Ammonia Borane...

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

    of High-Throughput Experimentation with Ammonia Borane Solid Hydrogen Storage Materials (presentation) Potential of High-Throughput Experimentation with Ammonia Borane Solid ...

  6. NREL: Wind Research - New Study Reveals Potential 30% Penetration...

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

    New Study Reveals Potential 30% Penetration of Wind and Solar for the Eastern Interconnection An illustrated map of the U.S. northeast and midwest showing transmission lines...

  7. Assessment of Energy Production Potential from Ocean Currents...

    Broader source: Energy.gov (indexed) [DOE]

    of ocean currents in the United States and the database created with that data. Assessment of Energy Production Potential from Ocean Currents along the United States Coastline...

  8. Property:PotentialEGSGeothermalGeneration | Open Energy Information

    Open Energy Info (EERE)

    Property Type Quantity Description The estimated potential energy generation from EGS Geothermal for a particular place. Use this type to express a quantity of energy. The...

  9. Self Potential Measurements At Raft River Geothermal Area (1983...

    Open Energy Info (EERE)

    Measurements At Raft River Geothermal Area (1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Self Potential Measurements At Raft River...

  10. A Snapshot Of Geothermal Energy Potential And Utilization In...

    Open Energy Info (EERE)

    Snapshot Of Geothermal Energy Potential And Utilization In Turkey Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: A Snapshot Of Geothermal...

  11. Geothermal energy potential in Chaffee County, Colorado | Open...

    Open Energy Info (EERE)

    Colorado Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Geothermal energy potential in Chaffee County, Colorado Author F.C. Healy Published...

  12. Self Potential At Roosevelt Hot Springs Area (Combs 2006) | Open...

    Open Energy Info (EERE)

    States Additional References Retrieved from "http:en.openei.orgwindex.php?titleSelfPotentialAtRooseveltHotSpringsArea(Combs2006)&oldid389683" Feedback...

  13. Researchers Uncover Copper's Potential for Reducing CO2 Emissions...

    Broader source: Energy.gov (indexed) [DOE]

    Researchers Uncover Coppers Potential for Reducing CO2 Emissions in Chemical Looping ... When used as a part of a promising coal combustion technology known as chemical looping, ...

  14. Property:PotentialBiopowerGaseousGeneration | Open Energy Information

    Open Energy Info (EERE)

    Megawatthour Gigawatt hours - 0.000001 GWh, Gigawatt hour, Gigawatthour Joules - 3600000 J, Joules, joules Pages using the property "PotentialBiopowerGaseousGeneration" Showing 25...

  15. Self Potential At Hualalai Northwest Rift Area (Thomas, 1986...

    Open Energy Info (EERE)

    Unknown Notes Self-potential surveys conducted over the summit and flank of Hualalai (Jackson and Sako, 1982; D. B. Jackson, pers. commun., 1983) indicate an elongate...

  16. Webinar January 21: Potential Strategies for Integrating Solar...

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

    Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis Webinar January 21: Potential Strategies for Integrating Solar Hydrogen Production and Concentrating ...

  17. Evaluation of Geothermal Potential of Lightning Dock KGRA, New...

    Open Energy Info (EERE)

    with the interpretation of information obtained from digitized map layers created in ArcGIS. The evaluation indicates that the Lightning Dock area has high geothermal potential...

  18. ARM Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) Product

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

    Jensen, Michael

    ARM soundings are used to determine Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) and associated properties, using the following relationships;

  19. Shared Solar: Current Landscape, Market Potential, and the Impact...

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

    Shared Solar: Current Landscape, Market Potential, and the Impact of Federal Securities Regulation David Feldman, 1 Anna M. Brockway, 2 Elaine Ulrich, 2 and Robert Margolis 1 1...

  20. Quantum-Mechanical Interatomic Potentials with Electron Temperature...

    Office of Scientific and Technical Information (OSTI)

    Electron Temperature for Strong Coupling Transition Metals Citation Details In-Document Search Title: Quantum-Mechanical Interatomic Potentials with Electron Temperature for ...

  1. Report to Congress on the Potential Environmental Effects of...

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

    ... This report focuses on potential impacts of marine and hydrokinetic technologies to aquatic environments (i.e., rivers, estuaries, and oceans), fish and fish habitats, ecological ...

  2. Clean Energy Policy Analysis: Impact Analysis of Potential Clean...

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

    7891 April 2010 Clean Energy Policy Analysis: Impact Analysis of Potential Clean Energy Policy Options for the Hawaii Clean Energy Initiative S. Busche and E. Doris National ...

  3. POSTPONED: Webinar November 19: Potential Strategies for Integrating...

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

    Eastern Standard Time (EST). An analysis conducted by Sandia National Laboratories explored potential synergies that may be realized by integrating solar hydrogen production and ...

  4. Photovoltaic Potential and Insolation Maps (Canada) | Open Energy...

    Open Energy Info (EERE)

    Insolation Maps (Canada) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Photovoltaic Potential and Insolation Maps (Canada) Focus Area: Renewable Energy Topics:...

  5. COLLOQUIUM: The Power of Neuroplasticity: Enhancing Human Potential...

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

    Human Potential Dr. Paula Tallal Rutgers University Presentation: File Presentation Language-based learning disabilities affect approximately 20% of the population and increase...

  6. Urban Surfaces and Heat Island Mitigation Potentials (Journal...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Urban Surfaces and Heat Island Mitigation Potentials Citation Details ... and urban vegetation (trees, grass, shrubs) on the meteorology and air quality of a city. ...

  7. Self Potential At Haleakala Volcano Area (Thomas, 1986) | Open...

    Open Energy Info (EERE)

    1986) Exploration Activity Details Location Haleakala Volcano Area Exploration Technique Self Potential Activity Date Usefulness not indicated DOE-funding Unknown References...

  8. Property:PotentialRuralUtilityScalePVCapacity | Open Energy Informatio...

    Open Energy Info (EERE)

    express potential electric energy generation, such as Nameplate Capacity. The default unit is megawatts (MW). For spatial capacity, use property Volume. Acceptable units (and...

  9. Technical Information Exchange on Pyrolysis Oil: Potential for...

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

    Two-day agenda from the workshop: Technical Information Exchange on Pyrolysis Oil: Potential for a renewable heating oil substitution fuel in New England. PDF icon ...

  10. ARM Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) Product

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

    Jensen, Michael

    2014-04-10

    ARM soundings are used to determine Convective Available Potential Energy (CAPE), Convective Inhibition (CIN) and associated properties, using the following relationships;

  11. New Report Outlines Potential of Future Water Resource Recovery...

    Energy Savers [EERE]

    Such a shift offers the potential to reduce the financial burdens on municipalities, decrease stress on energy systems, cut air and water pollution, improve system resiliency to ...

  12. An analytical bond-order potential for carbon

    SciTech Connect (OSTI)

    Zhou, Xiaowang; Ward, Donald K.; Foster, Michael E.

    2015-05-27

    Carbon is the most widely studied material today because it exhibits special properties not seen in any other materials when in nano dimensions such as nanotube and graphene. Reduction of material defects created during synthesis has become critical to realize the full potential of carbon structures. Molecular dynamics (MD) simulations, in principle, allow defect formation mechanisms to be studied with high fidelity, and can, therefore, help guide experiments for defect reduction. Such MD simulations must satisfy a set of stringent requirements. First, they must employ an interatomic potential formalism that is transferable to a variety of carbon structures. Second, the potential needs to be appropriately parameterized to capture the property trends of important carbon structures, in particular, diamond, graphite, graphene, and nanotubes. The potential must predict the crystalline growth of the correct phases during direct MD simulations of synthesis to achieve a predictive simulation of defect formation. An unlimited number of structures not included in the potential parameterization are encountered, thus the literature carbon potentials are often not sufficient for growth simulations. We have developed an analytical bond order potential for carbon, and have made it available through the public MD simulation package LAMMPS. We also demonstrate that our potential reasonably captures the property trends of important carbon phases. As a result, stringent MD simulations convincingly show that our potential accounts not only for the crystalline growth of graphene, graphite, and carbon nanotubes but also for the transformation of graphite to diamond at high pressure.

  13. Energy Dept. Report Finds Major Potential to Grow Clean, Sustainable...

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

    Kansas, Missouri, Pennsylvania and Wyoming led the rest of the country in new stream-reach hydropower potential. The hydropower resource assessment also analyzed technical, ...

  14. Cost and Potential of Monolithic CIGS Photovoltaic Modules (Presentati...

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

    Cost and Potential of Monolithic CIGS Photovoltaic Modules IEEE Photovoltaic Specialists Conference, New Orleans Kelsey A. W. Horowitz and Michael Woodhouse June 17, 2015 NREL...

  15. Chiral symmetry restoration at large chemical potential in strongly...

    Office of Scientific and Technical Information (OSTI)

    SYMMETRY; CHIRALITY; CLUSTER EXPANSION; CORRELATIONS; GAUGE INVARIANCE; POTENTIALS; QUANTUM FIELD THEORY; QUARKS; SPACE-TIME; STRONG-COUPLING MODEL; SU GROUPS Word Cloud More...

  16. Spontaneous Potential At Fort Bidwell Area (Laney, 2005) | Open...

    Open Energy Info (EERE)

    Location Fort Bidwell Area Exploration Technique Spontaneous Potential Well Log Activity Date Usefulness not indicated DOE-funding Unknown Notes Magnetotelluric Imaging, G....

  17. Energy Savings Potential and RD&D Opportunities for Residential...

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

    Energy Savings Potential and RD&D Opportunities for Residential Building HVAC Systems This report assesses 135 different heating, ventilation, and air-conditioning (HVAC) ...

  18. Energy Savings Potential and RD&D Opportunities for Commercial...

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

    Energy Savings Potential and RD&D Opportunities for Commercial Building HVAC This report assesses 182 different heating, ventilation, and air-conditioning (HVAC) technologies for ...

  19. Potential of Thermoelectrics forOccupant Comfort and Fuel Efficiency...

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

    of Thermoelectrics forOccupant Comfort and Fuel Efficiency Gains in Vehicle Applications Potential of Thermoelectrics forOccupant Comfort and Fuel Efficiency Gains in Vehicle ...

  20. Huge Potential for Hydropower: Assessment Highlights New Possible...

    Broader source: Energy.gov (indexed) [DOE]

    Researchers used new advancements in geospatial analysis to provide a first-of-its-kind look at the nation's developable hydropower potential. Several environmental, technical and ...

  1. An Investigation Of The Potential For Geothermal-Energy Recovery...

    Open Energy Info (EERE)

    The Potential For Geothermal-Energy Recovery In The Calgary Area In Southern Alberta, Canada, Using Petroleum-Exploration Data Jump to: navigation, search OpenEI Reference...

  2. FOIASI - Special Inquiry Review of Allegations InvolvingPotentialMisc...

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

    The allegations involved potential violations of political activity restrictions, lack of impartiality in performing official duties, misuse of position, and other related ...

  3. Handling and Packaging a Potentially Radiologically Contaminated Patient

    Broader source: Energy.gov [DOE]

    The purpose of this procedure is to provide guidance to EMS care providers for properly handling and packaging potentially radiologically contaminated patients.

  4. Hydrogen Resource Assessment: Hydrogen Potential from Coal, Natural...

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

    60-42773 February 2009 Hydrogen Resource Assessment Hydrogen Potential from Coal, Natural Gas, Nuclear, and Hydro Power Anelia Milbrandt and Margaret Mann National Renewable Energy...

  5. An analytical bond-order potential for carbon

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

    Zhou, Xiaowang; Ward, Donald K.; Foster, Michael E.

    2015-05-27

    Carbon is the most widely studied material today because it exhibits special properties not seen in any other materials when in nano dimensions such as nanotube and graphene. Reduction of material defects created during synthesis has become critical to realize the full potential of carbon structures. Molecular dynamics (MD) simulations, in principle, allow defect formation mechanisms to be studied with high fidelity, and can, therefore, help guide experiments for defect reduction. Such MD simulations must satisfy a set of stringent requirements. First, they must employ an interatomic potential formalism that is transferable to a variety of carbon structures. Second, themore » potential needs to be appropriately parameterized to capture the property trends of important carbon structures, in particular, diamond, graphite, graphene, and nanotubes. The potential must predict the crystalline growth of the correct phases during direct MD simulations of synthesis to achieve a predictive simulation of defect formation. An unlimited number of structures not included in the potential parameterization are encountered, thus the literature carbon potentials are often not sufficient for growth simulations. We have developed an analytical bond order potential for carbon, and have made it available through the public MD simulation package LAMMPS. We also demonstrate that our potential reasonably captures the property trends of important carbon phases. As a result, stringent MD simulations convincingly show that our potential accounts not only for the crystalline growth of graphene, graphite, and carbon nanotubes but also for the transformation of graphite to diamond at high pressure.« less

  6. Direct Determination of Equilibrium Potentials for Hydrogen Oxidation/Production by Open Circuit Potential Measurements in Acetonitrile

    SciTech Connect (OSTI)

    Roberts, John A.; Bullock, R. Morris

    2013-03-14

    Open circuit potentials were measured for acetonitrile solutions of a variety of acids and their conjugate bases under 1 atm H2. Acids examined include triethylammonium, dimethylformamidium, 2,6-dichloroanilinium, 4-cyanoanilinium, 4-bromoanilinium, and 4-anisidinium salts. These potentials, together with the pKa values of the acids, establish the value of the standard hydrogen electrode (SHE) potential in acetonitrile as ?0.028(4) V vs the ferrocenium/ferrocene couple. Dimethylformamidium is shown to form homoconjugates and other aggregates with dimethylformamide; open circuit potentials are used to quantify the extent of these reactions. Overpotentials for electrocatalytic hydrogen production and oxidation were determined from open circuit potentials and voltammograms of acidic or basic catalyst solutions under H2. This method requires neither pKa values, homoconjugation constants, nor an estimate for the SHE potential and thus allows direct comparison of catalytic systems in different media.

  7. NREL Study Shows Renewable Energy Potential in Every State

    Office of Energy Efficiency and Renewable Energy (EERE)

    A new study of renewable energy's technical potential finds that every state in the nation has the space and resources to generate clean energy. The Department of Energy's National Renewable Energy Laboratory (NREL) produced the study, U.S. Renewable Energy Technical Potentials, which looks at each state's available renewable resources for solar, wind, biopower, geothermal, and hydropower energy.

  8. Interpretation of storage field well casing surface potentials

    SciTech Connect (OSTI)

    Dabkowski, J.

    1987-01-01

    The shape of a well casing-to-soil potential gradient surface profile is influenced by many variables. Hence, the interpretation of such field data can be difficult. The paper illustrates how such factors as layered ground resistivity, polarization potential variations with depth, and external interference affect the profiles and, therefore, the interpretation of field data.

  9. Potential of Diazorphic, Endophytic Bacteria Associated with Sugarcane for

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

    Energycane Production | Department of Energy Potential of Diazorphic, Endophytic Bacteria Associated with Sugarcane for Energycane Production Potential of Diazorphic, Endophytic Bacteria Associated with Sugarcane for Energycane Production This presentation by Michal Gisham was given at the Symbiosis Conference. PDF icon symbiosis_conference_grisham.pdf More Documents & Publications Symbiosis Biofeedstock Conference: Expanding Commercialization of Mutualistic Microbes to Increase

  10. Density functional theory based generalized effective fragment potential method

    SciTech Connect (OSTI)

    Nguyen, Kiet A. E-mail: ruth.pachter@wpafb.af.mil; Pachter, Ruth E-mail: ruth.pachter@wpafb.af.mil; Day, Paul N.

    2014-06-28

    We present a generalized Kohn-Sham (KS) density functional theory (DFT) based effective fragment potential (EFP2-DFT) method for the treatment of solvent effects. Similar to the original Hartree-Fock (HF) based potential with fitted parameters for water (EFP1) and the generalized HF based potential (EFP2-HF), EFP2-DFT includes electrostatic, exchange-repulsion, polarization, and dispersion potentials, which are generated for a chosen DFT functional for a given isolated molecule. The method does not have fitted parameters, except for implicit parameters within a chosen functional and the dispersion correction to the potential. The electrostatic potential is modeled with a multipolar expansion at each atomic center and bond midpoint using Stone's distributed multipolar analysis. The exchange-repulsion potential between two fragments is composed of the overlap and kinetic energy integrals and the nondiagonal KS matrices in the localized molecular orbital basis. The polarization potential is derived from the static molecular polarizability. The dispersion potential includes the intermolecular D3 dispersion correction of Grimme et al. [J. Chem. Phys. 132, 154104 (2010)]. The potential generated from the CAMB3LYP functional has mean unsigned errors (MUEs) with respect to results from coupled cluster singles, doubles, and perturbative triples with a complete basis set limit (CCSD(T)/CBS) extrapolation, of 1.7, 2.2, 2.0, and 0.5 kcal/mol, for the S22, water-benzene clusters, water clusters, and n-alkane dimers benchmark sets, respectively. The corresponding EFP2-HF errors for the respective benchmarks are 2.41, 3.1, 1.8, and 2.5 kcal/mol. Thus, the new EFP2-DFT-D3 method with the CAMB3LYP functional provides comparable or improved results at lower computational cost and, therefore, extends the range of applicability of EFP2 to larger system sizes.

  11. The Potential for Renewable Energy Development to Benefit Restoration of the Salton Sea. Analysis of Technical and Market Potential

    SciTech Connect (OSTI)

    Gagne, Douglas; Haase, Scott; Oakleaf, Brett; Hurlbut, David; Akar, Sertac; Wall, Anna; Turchi, Craig; Pienkos, Philip; Melius, Jennifer; Melaina, Marc

    2015-11-01

    This report summarizes the potential for renewable energy development in the Salton Sea region, as well as the potential for revenues from this development to contribute financially to Salton Sea restoration costs. It considers solar, geothermal, biofuels or nutraceutical production from algae pond cultivation, desalination using renewable energy, and mineral recovery from geothermal fluids.


  12. Technique development for polarized pipe-to-soil potential measurements

    SciTech Connect (OSTI)

    Dabkowski, J.

    1989-12-01

    Research project PR-200-513 was undertaken with the overall objective to develop practical techniques for determining the polarized pipe-to-soil potential of a buried pipeline. The importance of this project rests with the fact that pipe-to-soil potential measurements are the most commonly used means of assessing the level of cathodic protection on buried gas transmission pipelines. In the recent past years there has been a considerable amount of effort devoted to developing methods and instruments to correct measured pipe-to-soil potentials for IR drops that may occur from currents (from the cathodic protection system or stray sources) in the soil to obtain the polarized potential. However, many of the methods or instruments available are either time-consuming, cumbersome to use in the field, applicable to only certain types of cathodic protection systems and under particular circumstances, subject to influences from stray current sources or not fully developed as of yet. Thus, there is a need to develop a practical method of determining the polarized pipe potential free of IR drop errors. Hence, the objectives of the research program conducted were: (1) to test and evaluate comparatively existing polarized potential measurement approaches, and (2) to develop new approaches to determining the polarized potential.

  13. Atomistic Potentials for the Molybdenum-Silicon System

    SciTech Connect (OSTI)

    M. I. Baskes

    1998-11-01

    Using a modified version of the Embedded Atom Method (EAM) that includes angular forces, potentials are developed for the Mo/Si system. Previously developed potentials for Mo and Si are used. The cross potential is fit to properties of MoSi2, Mo3Si, and Mo5Si3. Predictions are presented for phase stability, lattice constants, elastic constants, and point and planar defect energies. In general the agreement with experiment is good, but the predicted lattice constants are somewhat greater than experiment.

  14. Communication: Separable potential energy surfaces from multiplicative artificial neural networks

    SciTech Connect (OSTI)

    Koch, Werner, E-mail: wkoch@thethirdrock.net; Zhang, Dong H. [State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical Computational Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian (China)

    2014-07-14

    We present a potential energy surface fitting scheme based on multiplicative artificial neural networks. It has the sum of products form required for efficient computation of the dynamics of multidimensional quantum systems with the multi configuration time dependent Hartree method. Moreover, it results in analytic potential energy matrix elements when combined with quantum dynamics methods using Gaussian basis functions, eliminating the need for a local harmonic approximation. Scaling behavior with respect to the complexity of the potential as well as the requested accuracy is discussed.

  15. Combined Heat and Power Market Potential for Opportunity Fuels

    SciTech Connect (OSTI)

    Jones, David; Lemar, Paul

    2015-12-01

    This report estimates the potential for opportunity fuel combined heat and power (CHP) applications in the United States, and provides estimates for the technical and economic market potential compared to those included in an earlier report. An opportunity fuel is any type of fuel that is not widely used when compared to traditional fossil fuels. Opportunity fuels primarily consist of biomass fuels, industrial waste products and fossil fuel derivatives. These fuels have the potential to be an economically viable source of power generation in various CHP applications.

  16. Framework for State-Level Renewable Energy Market Potential Studies

    SciTech Connect (OSTI)

    Kreycik, C.; Vimmerstedt, L.; Doris, E.

    2010-01-01

    State-level policymakers are relying on estimates of the market potential for renewable energy resources as they set goals and develop policies to accelerate the development of these resources. Therefore, accuracy of such estimates should be understood and possibly improved to appropriately support these decisions. This document provides a framework and next steps for state officials who require estimates of renewable energy market potential. The report gives insight into how to conduct a market potential study, including what supporting data are needed and what types of assumptions need to be made. The report distinguishes between goal-oriented studies and other types of studies, and explains the benefits of each.

  17. Thermodynamics of a lattice gas with linear attractive potential (Journal

    Office of Scientific and Technical Information (OSTI)

    Article) | SciTech Connect Thermodynamics of a lattice gas with linear attractive potential Citation Details In-Document Search Title: Thermodynamics of a lattice gas with linear attractive potential We study the equilibrium thermodynamics of a one-dimensional lattice gas with interaction V(|i-j|)=-1/(μn) (ξ-1/n |i-j|) given by the superposition of a universal attractive interaction with strength -1/(μn) ξ<0, and a linear attractive potential 1/(μn{sup 2}) |i-j|. The interaction is

  18. Mapping the Frontier of New Wind Power Potential

    Broader source: Energy.gov [DOE]

    Partnered with AWS Truepower, the National Renewable Energy Laboratory and the Energy Departments Wind Program released maps in December 2014 that highlight the potential for wind energy...

  19. EERE Webinar: The Economic Potential of Renewable Power

    Office of Energy Efficiency and Renewable Energy (EERE)

    Please join the Office of Energy Efficiency and Renewable Energy for a webinar discussing their recent report analyzing the economic potential of renewable power in the United States. Estimating...

  20. Property:PotentialUrbanUtilityScalePVGeneration | Open Energy...

    Open Energy Info (EERE)

    Quantity Description The estimated potential energy generation from utility-scale PV in urban areas of a particular place. Use this type to express a quantity of energy. The...

  1. Copper Aluminate as a potential material for high temperature...

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

    Copper Aluminate as a potential material for high temperature thermoelectric power generation Home Author: D. T. Morelli, E. D. Case, B. D. Hall, S. Wang Year: 2008 Abstract: URL:...

  2. Land Use and Water Efficiency in Current and Potential Future...

    Office of Scientific and Technical Information (OSTI)

    Water Efficiency in Current and Potential Future U.S. Corn and Brazilian Sugarcane Ethanol Systems (Poster) Citation Details In-Document Search Title: Land Use and Water Efficiency ...

  3. Interpretation of self-potential measurements during injection...

    Open Energy Info (EERE)

    self-potential measurements during injection tests at Raft River, Idaho. Final report Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Interpretation of...

  4. Video: Realizing the Potential of Underutilized ECMs in ESPCs

    Broader source: Energy.gov [DOE]

    Video summarizes Realizing the Potential of Underutilized ECMs in ESPCs, a Federal Energy Management Program eTraining core course, which focuses on four energy conservation measures (ECMs) that are underutilized in federal energy savings performance contracts (ESPCs).

  5. Evaluation of Geothermal Potential of Rio Grande Rift and Basin...

    Open Energy Info (EERE)

    to: navigation, search OpenEI Reference LibraryAdd to library Report: Evaluation of Geothermal Potential of Rio Grande Rift and Basin and Range Province, New Mexico Abstract A...

  6. Tapping Our Commercial Potential: Work with the National Labs

    Broader source: Energy.gov [DOE]

    In 2010 alone, the Energy Department’s 17 National Laboratories and 5 facilities executed more than 13,500 technology transfer transactions. Learn more about the ways we are tapping the potential of the Energy Department's scientific discoveries.

  7. Utilization of Used Nuclear Fuel (UNF) in a Potential Future...

    Office of Scientific and Technical Information (OSTI)

    Utilization of Used Nuclear Fuel (UNF) in a Potential Future U.S. Fuel Cycle Scenario Citation Details In-Document Search Title: Utilization of Used Nuclear Fuel (UNF) in a ...

  8. Exact and approximate Kohn-Sham potentials in ensemble density...

    Office of Scientific and Technical Information (OSTI)

    Title: Exact and approximate Kohn-Sham potentials in ensemble density-functional theory Authors: Yang, Zeng-hui ; Trail, John R. ; Pribram-Jones, Aurora ; Burke, Kieron ; Needs, ...

  9. Insights from Smart Meters: The Potential for Peak Hour Savings...

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

    Insights from Smart Meters: The Potential for Peak Hour Savings from Behavior-Based Programs This report focuses on one example of the value that analysis of this data can provide: ...

  10. Computational studies of polysiloxanes : oxidation potentials and decomposition reactions.

    SciTech Connect (OSTI)

    Assary, R. S.; Curtiss, L. A.; Redfern, P. C.; Zhang, Z.; Amine, K.

    2011-06-23

    Silicon-containing solvents have tremendous potential for application as electrolytes for electrical energy storage devices such as lithium-ion (air) batteries and supercapacitors. Quantum chemical methods were employed to investigate trends in oxidation potentials and decomposition reactions of a series of polysiloxanes. Various electron-donating and -withdrawing substituents can be used to tune the oxidation potential in shorter chain siloxanes but not in longer ones. Decomposition reactions of siloxanes in their oxidized states were investigated and compared against their carbon analogues. These studies suggest that the Si-O group provides added stability for siloxanes over their carbon analogues. Computational studies have also been performed for various disiloxanes and siloxanes with spacer groups to understand their thermochemical stability and oxidation potentials.

  11. New screening process for potentially cancer causing chemicals

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

    New screening process for potentially cancer causing chemicals Click to share on Facebook (Opens in new window) Click to share on Twitter (Opens in new window) Click to share on ...

  12. Modeling the National Potential for Offshore Wind: Preprint

    SciTech Connect (OSTI)

    Short, W.; Sullivan, P.

    2007-06-01

    The Wind Deployment System (WinDS) model was created to assess the potential penetration of offshore wind in the United States under different technology development, cost, and policy scenarios.

  13. New Report Shows Domestic Offshore Wind Industry Potential, 21...

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

    Report Shows Domestic Offshore Wind Industry Potential, 21 Projects Planned in U.S. Waters ... first commercial-scale offshore wind farm, one of 21 projects totaling 15,650 ...

  14. Evaluation of an Electrostatic Dust Removal System with Potential...

    Office of Scientific and Technical Information (OSTI)

    96 PPPL- 4596 Evaluation of an Electrostatic Dust Removal System with Potential Application in Next-Step Fusion Devices January, 2011 F.Q.L. Friesen, B. John, C.H. Skinner, A.L. ...

  15. Technical Information Exchange on Pyrolysis Oil: Potential for...

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

    Renewab;e Heating Oil Substation Fuel in New England Technical Information Exchange on Pyrolysis Oil: Potential for a Renewab;e Heating Oil Substation Fuel in New England This ...

  16. Effective Semi-empirical Interaction Potential for Dusty Particles

    SciTech Connect (OSTI)

    Ramazanov, T. S.; Dzhumagulova, K. N.; Omarbakiyeva, Y. A.; Dosbolayev, M. K.; Jumabekov, A. N.

    2008-09-07

    The Poisson equation was numerically solved on the basis of the experimental correlation functions of dusty particles. Calculations were performed with real parameters of dusty plasma. Reconstructed potential has oscillated character; the minimums coincide to maximums of correlation functions.

  17. Breakthrough Berkeley Mist Sealant Technology: Potential to Save...

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

    Berkeley Mist Sealant Technology: Potential to Save Americans 5B Per Year Breakthrough ... thousands of leaks in 4 to 8 hours, saving a home owner on average 600 to 850 per year. ...

  18. Geology, Water Geochemistry And Geothermal Potential Of The Jemez...

    Open Energy Info (EERE)

    Geology, Water Geochemistry And Geothermal Potential Of The Jemez Springs Area, Canon De San Diego, New Mexico Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  19. Energy Consumption and Renewable Energy Development Potential on Indian Lands

    Reports and Publications (EIA)

    2000-01-01

    Includes information on the electricity use and needs of Indian households and tribes, the comparative electricity rates that Indian households are paying, and the potential for renewable resources development of Indian lands.

  20. Copper Aluminate as a potential material for high temperature

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

    thermoelectric power generation | Energy Frontier Research Centers Copper Aluminate as a potential material for high temperature thermoelectric power generation Home Author: D. T. Morelli, E. D. Case, B. D. Hall, S. Wang Year: 2008 Abstract: URL:

  1. Potential for Hydrogen Production from Key Renewable Resources...

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

    Potential for Hydrogen Production from Key Renewable Resources in the United States A. Milbrandt and M. Mann Technical Report NRELTP-640-41134 February 2007 NREL is operated by...

  2. Modeling the Market Potential of Hydrogen from Wind and Competing...

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

    8 May 2005 Modeling the Market Potential of Hydrogen from Wind and Competing Sources Preprint W. Short, N. Blair, and D. Heimiller To be presented at WINDPOWER 2005 Denver,...

  3. NREL Reveals Potential for Capturing Waste Heat via Nanotubes - News

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

    Releases | NREL Reveals Potential for Capturing Waste Heat via Nanotubes April 4, 2016 A finely tuned carbon nanotube thin film has the potential to act as a thermoelectric power generator that captures and uses waste heat, according to researchers at the Energy Department's National Renewable Energy Laboratory (NREL). The research could help guide the manufacture of thermoelectric devices based on either single-walled carbon nanotube (SWCNT) films or composites containing these nanotubes.

  4. The Power and Potential of Geothermal Energy | Department of Energy

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

    and Potential of Geothermal Energy The Power and Potential of Geothermal Energy October 3, 2011 - 7:03pm Addthis Dan Leistikow Dan Leistikow Former Director, Office of Public Affairs As Secretary Chu noted this weekend, America finds itself in a fierce global competition for the clean energy jobs and industries of the future - with countries like China, Germany and others investing tens of billions of dollars to expand their domestic renewable energy industry and capture the lead in a rapidly

  5. Evaluation of the Potential for Agricultural Development at the Hanford

    Office of Scientific and Technical Information (OSTI)

    Site (Technical Report) | SciTech Connect Technical Report: Evaluation of the Potential for Agricultural Development at the Hanford Site Citation Details In-Document Search Title: Evaluation of the Potential for Agricultural Development at the Hanford Site By 2050, when cleanup of the Hanford Site is expected to be completed, large worldwide demands to increase the global production of animal and fish protein, food, and fiber are anticipated, despite advancements in crop breeding, genetic

  6. Fully Ceramic Microencapsulated Fuels: Characteristics and Potential LWR

    Office of Scientific and Technical Information (OSTI)

    Applications (Conference) | SciTech Connect Fully Ceramic Microencapsulated Fuels: Characteristics and Potential LWR Applications Citation Details In-Document Search Title: Fully Ceramic Microencapsulated Fuels: Characteristics and Potential LWR Applications Authors: Powers, Jeffrey J [1] ; Worrall, Andrew [1] ; Terrani, Kurt A [1] ; Gehin, Jess C [1] ; Snead, Lance Lewis [1] + Show Author Affiliations ORNL Publication Date: 2014-01-01 OSTI Identifier: 1159469 DOE Contract Number:

  7. GREENHOUSE GAS REDUCTION POTENTIAL WITH COMBINED HEAT AND POWER WITH

    Office of Scientific and Technical Information (OSTI)

    DISTRIBUTED GENERATION PRIME MOVERS - ASME 2012 (Conference) | SciTech Connect GREENHOUSE GAS REDUCTION POTENTIAL WITH COMBINED HEAT AND POWER WITH DISTRIBUTED GENERATION PRIME MOVERS - ASME 2012 Citation Details In-Document Search Title: GREENHOUSE GAS REDUCTION POTENTIAL WITH COMBINED HEAT AND POWER WITH DISTRIBUTED GENERATION PRIME MOVERS - ASME 2012 Pending or recently enacted greenhouse gas regulations and mandates are leading to the need for current and feasible GHG reduction solutions

  8. Home Energy Score Program: Update and Overview for Potential Partners |

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

    Department of Energy Score Program: Update and Overview for Potential Partners Home Energy Score Program: Update and Overview for Potential Partners Provides an overview of DOE's objectives for the Home Energy Score program including an overview of Home Energy Score pilots. PDF icon Home Energy Score program update More Documents & Publications Home Energy Score: Program Update for Interested Stakeholders Home Energy Score: Program Update for Interested Stakeholders Know the Score: Hear

  9. Thermodynamic Evaluation of Low-Global Warming Potential Refrigerants -

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

    2013 Peer Review | Department of Energy Refrigerants - 2013 Peer Review Thermodynamic Evaluation of Low-Global Warming Potential Refrigerants - 2013 Peer Review Emerging Technologies Project for the 2013 Building Technologies Office's Program Peer Review PDF icon emrgtech13_mclinden_040213.pdf More Documents & Publications Credit: National Institute of Standards Thermodynamic Evaluation of Low-Global Warming Potential Refrigerants Research & Development Roadmap: Next-Generation Low

  10. Tools for Discovery Offer Potential Hope for Huntington's | Department of

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

    Energy Tools for Discovery Offer Potential Hope for Huntington's Tools for Discovery Offer Potential Hope for Huntington's May 25, 2011 - 3:24pm Addthis Flora Meilleur prepares protein solutions for structural investigation with neutrons. | Courtesy of ORNL Flickr / Jason Richards Flora Meilleur prepares protein solutions for structural investigation with neutrons. | Courtesy of ORNL Flickr / Jason Richards Charles Rousseaux Charles Rousseaux Senior Communications Specialist (detailee) What

  11. Unlocking the Potential of Additive Manufacturing in the Fuel Cells

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

    Industry | Department of Energy Unlocking the Potential of Additive Manufacturing in the Fuel Cells Industry Unlocking the Potential of Additive Manufacturing in the Fuel Cells Industry Download presentation slides from the DOE Fuel Cell Technologies Office webinar "Additive Manufacturing for Fuel Cells" held on February 11, 2014. PDF icon Additive Manufacturing for Fuel Cells Webinar Slides More Documents & Publications QTR Webinar: Chapter 8 - Industry and Manufacturing AMO

  12. Working Fluids Low Global Warming Potential Refrigerants - 2013 Peer Review

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

    | Department of Energy Working Fluids Low Global Warming Potential Refrigerants - 2013 Peer Review Working Fluids Low Global Warming Potential Refrigerants - 2013 Peer Review Emerging Technologies Project for the 2013 Building Technologies Office's Program Peer Review PDF icon emrgtech12_vineyard_040313.pdf More Documents & Publications Brian Fricke conducts research in ORNL's Building Technologies Research & Integration Center. Low-GWP Refrigerants for Refrigeration Systems Image of

  13. Meeting Concerning Potential Test Procedures and Energy Conservation

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

    Standards for Set-Top Boxes and Network Equipment | Department of Energy Concerning Potential Test Procedures and Energy Conservation Standards for Set-Top Boxes and Network Equipment Meeting Concerning Potential Test Procedures and Energy Conservation Standards for Set-Top Boxes and Network Equipment In compliance with the Department of Energy's guidance on ex parte communications (74 Fed. Reg. 52795 (Oct. 14, 2009)), this memorandum provides a summary of a March 7, 2012, meeting with DOE

  14. WINDExchange: Offshore 90-Meter Wind Maps and Wind Resource Potential

    Wind Powering America (EERE)

    Offshore 90-Meter Wind Maps and Wind Resource Potential The U.S. Department of Energy provides 90-meter (m) height, high-resolution wind maps and estimates of the total offshore wind potential that would be possible from developing the available offshore areas. The offshore wind resource maps can be used as a guide to identify regions for commercial wind development. A map of the United States showing offshore wind resource. Washington offshore wind map. Oregon offshore wind map. California

  15. Assessment of Energy Production Potential from Ocean Currents along the

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

    United States Coastline | Department of Energy Ocean Currents along the United States Coastline Assessment of Energy Production Potential from Ocean Currents along the United States Coastline Report summarizing the results of seven years of numerical model simulations of ocean currents in the United States and the database created with that data. PDF icon Assessment of Energy Production Potential from Ocean Currents along the United States Coastline More Documents & Publications

  16. Notice of Study Availability - Potential Benefits of Distributed Generation

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

    and Rate-Related Issues That May Impede Their Expansion: Federal Register Notice Volume 72, No. 40 - Mar. 1, 2007 | Department of Energy Study Availability - Potential Benefits of Distributed Generation and Rate-Related Issues That May Impede Their Expansion: Federal Register Notice Volume 72, No. 40 - Mar. 1, 2007 Notice of Study Availability - Potential Benefits of Distributed Generation and Rate-Related Issues That May Impede Their Expansion: Federal Register Notice Volume 72, No. 40 -

  17. EERE Success Story-Mitigating Potential Environmental Impacts of Energy

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

    Development | Department of Energy Mitigating Potential Environmental Impacts of Energy Development EERE Success Story-Mitigating Potential Environmental Impacts of Energy Development April 15, 2013 - 12:00am Addthis Partnering with EERE, Normandeau Associates of Bedford, New Hampshire, developed a tool that characterizes the risk for bird and bat species that may be susceptible to collisions with wind turbines. This tool will be used in environmental decision-making for the planning,

  18. Federal Renewable Energy Project Potential by Technology | Department of

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

    Energy Potential by Technology Federal Renewable Energy Project Potential by Technology Federal renewable energy projects vary by technology and region and align with key market drivers, including renewable energy resource strength, utility rates, and local incentives. One way a federal agency can approach its 30% by 2025 renewable energy target is by examining its inventory of real property, calculating energy use and cost at each site, and obtaining and interpreting local renewable energy

  19. Researchers find potential key for unlocking biomass energy

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

    Unlocking biomass energy Researchers find potential key for unlocking biomass energy Potential pretreatment method that can make plant cellulose five times more digestible by enzymes that convert it into ethanol, a useful biofuel. July 20, 2011 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new

  20. Assessment of Energy Production Potential from Ocean Currents along the

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

    United States Coastline | Department of Energy Energy Production Potential from Ocean Currents along the United States Coastline Assessment of Energy Production Potential from Ocean Currents along the United States Coastline Report summarizing the results of seven years of numerical model simulations of ocean currents in the United States and the database created with that data. PDF icon energy_production_ocean_currents_us.pdf More Documents & Publications Assessment of Energy Production

  1. Quantification of the Potential Impact on Commercial Markets of DOE's

    Energy Savers [EERE]

    Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012 and 2013 | Department of Energy and 2013 Quantification of the Potential Impact on Commercial Markets of DOE's Transfer of Natural Uranium Hexaflouride During Calendar Years 2011, 2012 and 2013 A stuy of the potential impact of commerical markets of the Department of Energy's authoriziaton of uranium transfers to fund accelerated cleanup activities at the Portsmouth Site in Piketon, Ohio PDF icon

  2. Potential Aerosol Indirect Effects on Atmospheric Circulation and Radiative

    Office of Scientific and Technical Information (OSTI)

    Forcing through Deep Convection (Journal Article) | SciTech Connect Potential Aerosol Indirect Effects on Atmospheric Circulation and Radiative Forcing through Deep Convection Citation Details In-Document Search Title: Potential Aerosol Indirect Effects on Atmospheric Circulation and Radiative Forcing through Deep Convection Aerosol indirect effects, i.e., the interactions of aerosols with clouds by serving as cloud condensation nuclei (CCN) or ice nuclei (IN), constitute the largest

  3. Potential for radionuclide redistribution due to biotic intrusion:

    Office of Scientific and Technical Information (OSTI)

    Aboveground biomass study at the Los Alamos National Laboratory for the closure of Material Disposal Area G (Conference) | SciTech Connect Potential for radionuclide redistribution due to biotic intrusion: Aboveground biomass study at the Los Alamos National Laboratory for the closure of Material Disposal Area G Citation Details In-Document Search Title: Potential for radionuclide redistribution due to biotic intrusion: Aboveground biomass study at the Los Alamos National Laboratory for the

  4. Quantum Monte Carlo Calculations of Light Nuclei Using Chiral Potentials

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | SciTech Connect Quantum Monte Carlo Calculations of Light Nuclei Using Chiral Potentials Citation Details In-Document Search Title: Quantum Monte Carlo Calculations of Light Nuclei Using Chiral Potentials Authors: Lynn, J. E. ; Carlson, J. ; Epelbaum, E. ; Gandolfi, S. ; Gezerlis, A. ; Schwenk, A. Publication Date: 2014-11-04 OSTI Identifier: 1181024 Grant/Contract Number: AC02-05CH11231 Type: Publisher's Accepted Manuscript Journal Name: Physical Review Letters

  5. Quantum-Mechanical Interatomic Potentials with Electron Temperature for

    Office of Scientific and Technical Information (OSTI)

    Strong Coupling Transition Metals (Journal Article) | SciTech Connect Quantum-Mechanical Interatomic Potentials with Electron Temperature for Strong Coupling Transition Metals Citation Details In-Document Search Title: Quantum-Mechanical Interatomic Potentials with Electron Temperature for Strong Coupling Transition Metals Authors: Moriarty, J A ; Hood, R Q ; Yang, L H Publication Date: 2011-06-14 OSTI Identifier: 1184104 Report Number(s): LLNL-JRNL-487130 DOE Contract Number:

  6. RADIOACTIVE WASTE STREAMS FROM VARIOUS POTENTIAL NUCLEAR FUEL CYCLE OPTIONS

    Office of Scientific and Technical Information (OSTI)

    (Conference) | SciTech Connect Conference: RADIOACTIVE WASTE STREAMS FROM VARIOUS POTENTIAL NUCLEAR FUEL CYCLE OPTIONS Citation Details In-Document Search Title: RADIOACTIVE WASTE STREAMS FROM VARIOUS POTENTIAL NUCLEAR FUEL CYCLE OPTIONS Five fuel cycle options, about which little is known compared to more commonly known options, have been studied in the past year for the United States Department of Energy. These fuel cycle options, and their features relative to uranium-fueled light water

  7. Chiral random matrix model at finite chemical potential: Characteristic

    Office of Scientific and Technical Information (OSTI)

    determinant and edge universality (Journal Article) | DOE PAGES Published Article: Chiral random matrix model at finite chemical potential: Characteristic determinant and edge universality « Prev Next » Title: Chiral random matrix model at finite chemical potential: Characteristic determinant and edge universality Authors: Liu, Yizhuang ; Nowak, Maciej A. ; Zahed, Ismail Publication Date: 2016-08-01 OSTI Identifier: 1250302 Grant/Contract Number: DEC-2011/02/A/ST1/00119; FG-88ER40388 Type:

  8. Dynamic Potential Intensity: An improved representation of the ocean's

    Office of Scientific and Technical Information (OSTI)

    impact on tropical cyclones (Journal Article) | SciTech Connect Journal Article: Dynamic Potential Intensity: An improved representation of the ocean's impact on tropical cyclones Citation Details In-Document Search Title: Dynamic Potential Intensity: An improved representation of the ocean's impact on tropical cyclones To incorporate the effects of tropical cyclone (TC)-induced upper ocean mixing and sea surface temperature (SST) cooling on TC intensification, a vertical average of

  9. Innovative DOE Technology Demonstrates Potential for Significant Increases

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

    in Safe and Responsible Production from Depleted U.S. Oil Fields | Department of Energy Innovative DOE Technology Demonstrates Potential for Significant Increases in Safe and Responsible Production from Depleted U.S. Oil Fields Innovative DOE Technology Demonstrates Potential for Significant Increases in Safe and Responsible Production from Depleted U.S. Oil Fields April 25, 2012 - 1:00pm Addthis Washington, DC - The U.S. Department of Energy announced today that an innovative technology has

  10. Innovative Nanocoatings Unlock the Potential for Major Energy and Cost

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

    Savings for Airline Industry | Department of Energy Nanocoatings Unlock the Potential for Major Energy and Cost Savings for Airline Industry Innovative Nanocoatings Unlock the Potential for Major Energy and Cost Savings for Airline Industry July 17, 2012 - 3:33pm Addthis Erosion-resistant nanocoatings are making gas turbine engines more efficient, reducing cost and saving fuel. Erosion-resistant nanocoatings are making gas turbine engines more efficient, reducing cost and saving fuel. Bob

  11. High Power Laser Innovation Sparks Geothermal Power Potential | Department

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

    of Energy High Power Laser Innovation Sparks Geothermal Power Potential High Power Laser Innovation Sparks Geothermal Power Potential May 29, 2015 - 11:02am Addthis The Energy Department's project partner Foro Energy lab tests a high power laser tool with a patented technology that could maximize heat recovery from geothermal wells. Source: Foro Energy. The Energy Department's project partner Foro Energy lab tests a high power laser tool with a patented technology that could maximize heat

  12. Ribosome research in atomic detail offers potential insights into cancer,

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

    anemia, Alzheimer's Ribosome research offers potential insights into cancer Ribosome research in atomic detail offers potential insights into cancer, anemia, Alzheimer's A groundbreaking study of the human ribosome is revealing that the tiny molecular machine is more versatile than previously understood. July 3, 2014 Figure 3. The newly discovered rolling movement shown in (A) three-dimensional cryo-electron microscopy image of ribosome, and (B) computer-generated atomic-resolution model of

  13. DOE Requests Information on Potential New or Revised Categorical Exclusions

    Energy Savers [EERE]

    | Department of Energy on Potential New or Revised Categorical Exclusions DOE Requests Information on Potential New or Revised Categorical Exclusions December 22, 2009 - 10:33am Addthis The U.S. Department of Energy intends to update its National Environmental Policy Act (NEPA) categorical exclusions, and has posted a request for information on the NEPA website to seek input from interested individuals and organizations regarding new or revised categorical exclusions. Addthis Related

  14. Downhole Sensor Holds Transformative Potential | Department of Energy

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

    Downhole Sensor Holds Transformative Potential Downhole Sensor Holds Transformative Potential December 13, 2013 - 12:00am Addthis Long-term operation of electronics at high temperatures remains a challenge for the geothermal sector; many downhole sensors are prone to failure when deployed in high-temperature wells, which limits the availability and complexity of logging tools available for use in geothermal energy extraction. Funded by a GTO Recovery Act award, GE Global Research has elevated

  15. Geospatial Analysis of Renewable Energy Technical Potential on Tribal Lands

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

    Geospatial Analysis of Renewable Energy Technical Potential on Tribal Lands E. Doris, A. Lopez, and D. Beckley National Renewable Energy Laboratory U.S. Department of Energy | Office of Indian Energy 1000 Independence Ave. SW, Washington DC 20585 | 202-586-1272 energy.gov/indianenergy | indianenergy@hq.doe.gov Geospatial Analysis of Renewable Energy Technical Potential on Tribal Lands NOTICE This report was prepared as an account of work sponsored by an agency of the United States government.

  16. Supercomputers Help a Catalyst Reach its Full Potential

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

    Help a Catalyst Reach its Full Potential Supercomputers Help a Catalyst Reach its Full Potential Placing Protons Prevents Wasteful Profligate Reactions April 23, 2013 Contact: Linda Vu, lvu@lbl.gov +1 510 495 2402 protondeliverystory.jpg While one configuration (endo/endo) of a popular nickel catalyst can produce thousands of hydrogen molecules a second, the other forms that place the proton farther from the center are slower and less efficient. Chemical reactions facilitated by catalysts are

  17. Using multivariate analyses to compare subsets of electrodes and potentials

    Office of Scientific and Technical Information (OSTI)

    within an electrode array for predicting sugar concentrations in mixed solutions. (Journal Article) | SciTech Connect Journal Article: Using multivariate analyses to compare subsets of electrodes and potentials within an electrode array for predicting sugar concentrations in mixed solutions. Citation Details In-Document Search Title: Using multivariate analyses to compare subsets of electrodes and potentials within an electrode array for predicting sugar concentrations in mixed solutions. A

  18. Biogas Potential in the United States (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-10-01

    Biogas has received increased attention as an alternative energy source in the United States. The factsheet provides information about the biogas (methane) potential from various sources in the country (by county and state) and estimates the power generation and transportation fuels production (renewable natural gas) potential from these biogas sources. It provides valuable information to the industry, academia and policy makers in support of their future decisions.

  19. Plasma potential mapping of high power impulse magnetron sputtering discharges

    SciTech Connect (OSTI)

    Rauch, Albert; Mendelsberg, Rueben J.; Sanders, Jason M.; Anders, Andre

    2011-12-20

    Pulsed emissive probe techniques have been used to determine the plasma potential distribution of high power impulse magnetron sputtering (HiPIMS) discharges. An unbalanced magnetron with a niobium target in argon was investigated for pulse length of 100 ?s at a pulse repetition rate of 100 Hz, giving a peak current of 170 A. The probe data were taken with a time resolution of 20 ns and a spatial resolution of 1 mm. It is shown that the local plasma potential varies greatly in space and time. The lowest potential was found over the targets racetrack, gradually reaching anode potential (ground) several centimeters away from the target. The magnetic pre-sheath exhibits a funnel-shaped plasma potential resulting in an electric field which accelerates ions toward the racetrack. In certain regions and times, the potential exhibits weak local maxima which allow for ion acceleration to the substrate. Knowledge of the local E and static B fields lets us derive the electrons EB drift velocity, which is about 105 m/s and shows structures in space and time.

  20. Reassessing Wind Potential Estimates for India: Economic and Policy Implications

    SciTech Connect (OSTI)

    Phadke, Amol; Bharvirkar, Ranjit; Khangura, Jagmeet

    2011-09-15

    We assess developable on-shore wind potential in India at three different hub-heights and under two sensitivity scenarios – one with no farmland included, the other with all farmland included. Under the “no farmland included” case, the total wind potential in India ranges from 748 GW at 80m hub-height to 976 GW at 120m hub-height. Under the “all farmland included” case, the potential with a minimum capacity factor of 20 percent ranges from 984 GW to 1,549 GW. High quality wind energy sites, at 80m hub-height with a minimum capacity factor of 25 percent, have a potential between 253 GW (no farmland included) and 306 GW (all farmland included). Our estimates are more than 15 times the current official estimate of wind energy potential in India (estimated at 50m hub height) and are about one tenth of the official estimate of the wind energy potential in the US.

  1. The Potential for Renewable Energy Development to Benefit Restoration of the Salton Sea: Analysis of Technical and Market Potential

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

    The Potential for Renewable Energy Development to Benefit Restoration of the Salton Sea: Analysis of Technical and Market Potential Douglas Gagne, Scott Haase, Brett Oakleaf, David Hurlbut, Sertac Akar, Anna Wall, Craig Turchi, Philip Pienkos, Jennifer Melius, and Marc Melaina National Renewable Energy Laboratory Technical Report NREL/TP-7A40-64969 November 2015 NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency & Renewable Energy Operated by the

  2. Image potential states at metal-dielectric interfaces

    SciTech Connect (OSTI)

    Merry, W.R. Jr.

    1992-04-01

    Angle-resolved two-photon laser photoemission was used to observe the image potential electronic states on the (111) face of a silver single crystal. The transient image potential states were excited from the occupied bulk bands with photons whose energy was tunable around 4 eV. Photoemission of the image potential states was accomplished with photons of energy tunable around 2 eV. Image potential states were found to persist in the presence of physisorbed adlayers of xenon and cyclohexane. On clean Ag(111), the effective mass of the n=1 image potential state was found to be 1.4{plus_minus}0.1 times the mass of a free electron (m{sub e}). A binding energy of 0.77 eV, measured by earlier workers, was assumed in analysis of the data for the clean surface. On Ag(111), at 75 K covered by one monolayer of xenon, the binding energy of the n=1 image potential state was unchanged relative to its value on the clean surface. An effective mass of (1.00{plus_minus}0.05) {center_dot} m{sub e} was obtained. On Ag(111) at 167 K, covered by one monolayer of cyclohexane, the binding energy of the n=2 member of the image potential series was 0.30{plus_minus}0.05 eV. The energy of the n=1 state was again unchanged by deposition of the adsorbate. The effective masses of both states were (0.90{plus_minus}0.1) {center_dot} m{sub e}.

  3. Image potential states at metal-dielectric interfaces

    SciTech Connect (OSTI)

    Merry, W.R. Jr.

    1992-04-01

    Angle-resolved two-photon laser photoemission was used to observe the image potential electronic states on the (111) face of a silver single crystal. The transient image potential states were excited from the occupied bulk bands with photons whose energy was tunable around 4 eV. Photoemission of the image potential states was accomplished with photons of energy tunable around 2 eV. Image potential states were found to persist in the presence of physisorbed adlayers of xenon and cyclohexane. On clean Ag(111), the effective mass of the n=1 image potential state was found to be 1.4{plus minus}0.1 times the mass of a free electron (m{sub e}). A binding energy of 0.77 eV, measured by earlier workers, was assumed in analysis of the data for the clean surface. On Ag(111), at 75 K covered by one monolayer of xenon, the binding energy of the n=1 image potential state was unchanged relative to its value on the clean surface. An effective mass of (1.00{plus minus}0.05) {center dot} m{sub e} was obtained. On Ag(111) at 167 K, covered by one monolayer of cyclohexane, the binding energy of the n=2 member of the image potential series was 0.30{plus minus}0.05 eV. The energy of the n=1 state was again unchanged by deposition of the adsorbate. The effective masses of both states were (0.90{plus minus}0.1) {center dot} m{sub e}.

  4. Inner-shell and double ionization potentials of aminophenol isomers.

    SciTech Connect (OSTI)

    Kryzhevoi, N. V.; Santra, R.; Cederbaum, L. S.

    2011-01-01

    A comprehensive study of single and double core ionization potentials of the aminophenol molecule is reported. The role of relaxation, correlation, relativistic, and basis set effects in these potentials is clarified. Special attention is paid to the isomer dependence of the single and double core ionization potentials. Some of them are also compared with the respective values of the phenol and aniline molecules. It is shown that the core level single ionization potentials of the para-, meta-, and ortho-aminophenol molecules differ only slightly from each other, rendering these structural isomers challenging to distinguish for conventional x-ray photoelectron spectroscopy. In contrast, the energy needed to remove two core electrons from different atoms depends noticeably on the mutual arrangement and even on the relative orientations of the hydroxyl and amine groups. Together with the electrostatic repulsion between the two core holes, relaxation effects accompanying double core ionization play a crucial role here. The pronounced sensitivity of the double ionization potentials, therefore, enables a spectroscopic characterization of the electronic structure of aminophenol isomers by means of x-ray two-photon photoelectron spectroscopy.

  5. Local random potentials of high differentiability to model the Landscape

    SciTech Connect (OSTI)

    Battefeld, T.; Modi, C.

    2015-03-09

    We generate random functions locally via a novel generalization of Dyson Brownian motion, such that the functions are in a desired differentiability class C{sup k}, while ensuring that the Hessian is a member of the Gaussian orthogonal ensemble (other ensembles might be chosen if desired). Potentials in such higher differentiability classes (k≥2) are required/desirable to model string theoretical landscapes, for instance to compute cosmological perturbations (e.g., k=2 for the power-spectrum) or to search for minima (e.g., suitable de Sitter vacua for our universe). Since potentials are created locally, numerical studies become feasible even if the dimension of field space is large (D∼100). In addition to the theoretical prescription, we provide some numerical examples to highlight properties of such potentials; concrete cosmological applications will be discussed in companion publications.

  6. Prediction of binary nanoparticle superlattices from soft potentials

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

    Horst, Nathan; Travesset, Alex; Iowa State Univ., Ames, IA

    2016-01-07

    Driven by the hypothesis that a sufficiently continuous short-ranged potential is able to account for shell flexibility and phonon modes and therefore provides a more realistic description of nanoparticle interactions than a hard sphere model, we compute the solid phase diagram of particles of different radii interacting with an inverse power law potential. From a pool of 24 candidate lattices, the free energy is optimized with respect to additional internal parameters and the p-exponent, determining the short-range properties of the potential, is varied between p = 12 and p = 6. The phase diagrams contain the phases found in ongoingmore » self-assembly experiments, including DNA programmable self-assembly and nanoparticles with capping ligands assembled by evaporation from an organic solvent. Thus, the resulting phase diagrams can be mapped quantitatively to existing experiments as a function of only two parameters: Nanoparticle radius ratio (γ) and softness asymmetry.« less

  7. Nijmegen soft-core potential including two-meson exchange

    SciTech Connect (OSTI)

    Stoks, V.G.J.; Rijken, T.A.

    1995-05-10

    We report on the progress of the construction of the extended soft-core (ESC) Nijmegen potential. Next to the standard one-boson-exchange parts, the model includes the pion-meson-exchange potentials due to the parallel and crossed-box diagrams, as well as the one-pair and two-pair diagrams, vertices for which can be identified with similar interactions appearing in chiral-symmetric Lagrangians. Although the ESC potential is still under construction, it already gives an excellent description of all {ital NN} scattering data below 350 MeV with {chi}{sup 2}/datum=1.3. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

  8. Lieb-Liniger gas in a constant-force potential

    SciTech Connect (OSTI)

    Jukic, D.; Galic, S.; Buljan, H.; Pezer, R.

    2010-08-15

    We use Gaudin's Fermi-Bose mapping operator to calculate exact solutions for the Lieb-Liniger model in a linear (constant-force) potential (the constructed exact stationary solutions are referred to as the Lieb-Liniger-Airy wave functions). The ground-state properties of the gas in the wedgelike trapping potential are calculated in the strongly interacting regime by using Girardeau's Fermi-Bose mapping and the pseudopotential approach in the 1/c approximation (c denotes the strength of the interaction). We point out that quantum dynamics of Lieb-Liniger wave packets in the linear potential can be calculated by employing an N-dimensional Fourier transform as in the case of free expansion.

  9. Potential use of battery packs from NCAP tested vehicles.

    SciTech Connect (OSTI)

    Lamb, Joshua; Orendorff, Christopher J.

    2013-10-01

    Several large electric vehicle batteries available to the National Highway Traffic Safety Administration are candidates for use in future safety testing programs. The batteries, from vehicles subjected to NCAP crashworthiness testing, are considered potentially damaged due to the nature of testing their associated vehicles have been subjected to. Criteria for safe shipping to Sandia is discussed, as well as condition the batteries must be in to perform testing work. Also discussed are potential tests that could be performed under a variety of conditions. The ultimate value of potential testing performed on these cells will rest on the level of access available to the battery pack, i.e. external access only, access to the on board monitoring system/CAN port or internal electrical access to the battery. Greater access to the battery than external visual and temperature monitoring would likely require input from the battery manufacturer.

  10. Measurement of Semiconductor Surface Potential using the Scanning Electron Microscope

    SciTech Connect (OSTI)

    Heath, J. T.; Jiang, C. S.; Al-Jassim, M. M.

    2012-02-15

    We calibrate the secondary electron signal from a standard scanning electron microscope to voltage, yielding an image of the surface or near-surface potential. Data on both atomically abrupt heterojunction GaInP/GaAs and diffused homojunction Si solar cell devices clearly show the expected variation in potential with position and applied bias, giving depletion widths and locating metallurgical junctions to an accuracy better than 10 nm. In some images, distortion near the p-n junction is observed, seemingly consistent with the effects of lateral electric fields (patch fields). Reducing the tube bias removes this distortion. This approach results in rapid and straightforward collection of near-surface potential data using a standard scanning electron microscope.

  11. Evaluation of Global Onshore Wind Energy Potential and Generation Costs

    SciTech Connect (OSTI)

    Zhou, Yuyu; Luckow, Patrick; Smith, Steven J.; Clarke, Leon E.

    2012-06-20

    In this study, we develop an updated global estimate of onshore wind energy potential using reanalysis wind speed data, along with updated wind turbine technology performance and cost assumptions as well as explicit consideration of transmission distance in the calculation of transmission costs. We find that wind has the potential to supply a significant portion of world energy needs, although this potential varies substantially by region as well as with assumptions such as on what types of land can be used to site wind farms. Total global wind potential under central assumptions is estimated to be approximately 89 petawatt hours per year at less than 9 cents/kWh with substantial regional variations. One limitation of global wind analyses is that the resolution of current global wind speed reanalysis data can result in an underestimate of high wind areas. A sensitivity analysis of eight key parameters is presented. Wind potential is sensitive to a number of input parameters, particularly those related to land suitability and turbine density as well as cost and financing assumptions which have important policy implications. Transmission cost has a relatively small impact on total wind costs, changing the potential at a given cost by 20-30%. As a result of sensitivities studied here we suggest that further research intended to inform wind supply curve development focus not purely on physical science, such as better resolved wind maps, but also on these less well-defined factors, such as land-suitability, that will also have an impact on the long-term role of wind power.

  12. LED Watch: Unlocking the Full Potential of Indoor Systems

    Energy Savers [EERE]

    LD+A June 2015 www.ies.org Lighting control has long held the potential to deliver significant energy sav- ings by adjusting the amount of light to the real-time needs of a particular space and its occupants. But while myriad prod- ucts for controlling light have been com- mercially available for quite some time, their deployment and resulting energy savings have been limited. SSL products are poised to be the catalyst that unlocks that potential. SSL technology offers an unprecedented ability

  13. Renewable Hydrogen Potential from Biogas in the United States

    SciTech Connect (OSTI)

    Saur, G.; Milbrandt, A.

    2014-07-01

    This analysis updates and expands upon previous biogas studies to include total potential and net availability of methane in raw biogas with respect to competing demands and includes a resource assessment of four sources of biogas: (1) wastewater treatment plants, including domestic and a new assessment of industrial sources; (2) landfills; (3) animal manure; and (4) a new assessment of industrial, institutional, and commercial sources. The results of the biogas resource assessment are used to estimate the potential production of renewable hydrogen from biogas as well as the fuel cell electric vehicles that the produced hydrogen might support.

  14. Gigawatts of Geothermal: JASON Study Highlights Huge Potential for EGS |

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

    Department of Energy Gigawatts of Geothermal: JASON Study Highlights Huge Potential for EGS Gigawatts of Geothermal: JASON Study Highlights Huge Potential for EGS February 21, 2014 - 3:46pm Addthis JASON study members take in the landscape at Sugarloaf, an 86,000-year-old rhyolite dome in eastern California, and among the youngest dated volcanoes in the field. Andy Sabin (right), director of the Navy Geothermal Program Office, led the field trip to the Coso geothermal field, where the Navy

  15. Breakthrough Berkeley Mist Sealant Technology: Potential to Save Americans

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

    $5B Per Year | Department of Energy Berkeley Mist Sealant Technology: Potential to Save Americans $5B Per Year Breakthrough Berkeley Mist Sealant Technology: Potential to Save Americans $5B Per Year November 7, 2011 - 4:33pm Addthis A diagram of the Aeroseal sealant technology. | Image courtesy of Aeroseal LLC A diagram of the Aeroseal sealant technology. | Image courtesy of Aeroseal LLC Liisa O'Neill Liisa O'Neill Former New Media Specialist, Office of Public Affairs What does this mean for

  16. Energy Department Releases Report, Evaluates Potential for Wind Power in

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

    All 50 States | Department of Energy Report, Evaluates Potential for Wind Power in All 50 States Energy Department Releases Report, Evaluates Potential for Wind Power in All 50 States May 19, 2015 - 11:38am Addthis NEWS MEDIA CONTACT (202) 586-4940 DOENews@hq.doe.gov Larger turbines will open up an additional one-fifth of the land area of the United States WASHINGTON, D.C. - In support of the President's all-of-the above energy strategy, Energy Secretary Ernest Moniz today announced the

  17. Nucleon-nucleon scattering in a harmonic potential (Journal Article) |

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Journal Article: Nucleon-nucleon scattering in a harmonic potential Citation Details In-Document Search Title: Nucleon-nucleon scattering in a harmonic potential Authors: Luu, T ; Savage, M ; Schwenk, A ; Vary, J P Publication Date: 2010-06-02 OSTI Identifier: 1116861 Report Number(s): LLNL-JRNL-435031 DOE Contract Number: W-7405-ENG-48 Resource Type: Journal Article Resource Relation: Journal Name: Physical Review C, vol. 82, N/A, September 30, 2010, pp. 034003 Research Org:

  18. Energy Savings Potential and Research & Development Opportunities for Commercial Refrigeration

    SciTech Connect (OSTI)

    none,

    2009-09-01

    This study documents the energy consumption of commercial refrigeration equipment (CRE) in the U.S. and evaluated the energy savings potential of various technologies and energy efficiency measures that could be applied to such equipment. The study provided an overview of CRE applications, assessed the energy-savings potential of CRE in the U.S., outline key barriers to adoption of energy-savings technologies, and recommended opportunities for advanced energy saving technology research. The study was modeled after an earlier 1996 report by Arthur D. Little, Inc., and updated key information, examined more equipment types, and outlined long-term research and development opportunities.

  19. Estimating Production Potentials: Expert Bias in Applied Decision Making

    SciTech Connect (OSTI)

    Reece, Wendy Jane

    1998-10-01

    A study was conducted to evaluate how workers predict manufacturing production potentials given positively and negatively framed information. Findings indicate the existence of a bias toward positive information and suggest that this bias may be reduced with experience but is never the less maintained. Experts err in the same way non experts do in differentially processing negative and positive information. Additionally, both experts and non experts tend to overestimate production potentials in a positive direction. The authors propose that these biases should be addressed with further research including cross domain analyses and consideration in training, workplace design, and human performance modeling.

  20. Interaction potentials and thermodynamic properties of two component semiclassical plasma

    SciTech Connect (OSTI)

    Ramazanov, T. S.; Moldabekov, Zh. A.; Ismagambetova, T. N.; Gabdullin, M. T.

    2014-01-15

    In this paper, the effective interaction potential in two component semiclassical plasma, taking into account the long-range screening and the quantum-mechanical diffraction effects at short distances, is obtained on the basis of dielectric response function method. The structural properties of the semiclassical plasma are considered. The thermodynamic characteristics (the internal energy and the equation of state) are calculated using two methods: the method of effective potentials and the method of micropotentials with screening effect taken into account by the Ornstein-Zernike equation in the HNC approximation.

  1. Effective Interaction Potentials and Physical Properties of Complex Plasmas

    SciTech Connect (OSTI)

    Ramazanov, T. S.; Dzhumagulova, K. N.; Gabdullin, M. T.; Omarbakiyeva, Y. A.

    2009-11-10

    Microscopic, thermodynamic and transport properties of complex plasmas are investigated on the basis of effective potentials of interparticle interaction. These potentials take into account correlation effects and quantum-mechanical diffraction. Plasma composition, thermodynamic functions of hydrogen and helium plasmas are obtained for a wide region of coupling parameter. Collision processes in partially ionized plasma are considered; some kinetic characteristics such as phase shift, scattering cross section, bremsstrahlung cross section and absorption coefficient are investigated. Dynamic and transport properties of dusty plasma are studied by computer simulation method of the Langevin dynamics.

  2. How to Solve Schroedinger Problems by Approximating the Potential Function

    SciTech Connect (OSTI)

    Ledoux, Veerle; Van Daele, Marnix

    2010-09-30

    We give a survey over the efforts in the direction of solving the Schroedinger equation by using piecewise approximations of the potential function. Two types of approximating potentials have been considered in the literature, that is piecewise constant and piecewise linear functions. For polynomials of higher degree the approximating problem is not so easy to integrate analytically. This obstacle can be circumvented by using a perturbative approach to construct the solution of the approximating problem, leading to the so-called piecewise perturbation methods (PPM). We discuss the construction of a PPM in its most convenient form for applications and show that different PPM versions (CPM,LPM) are in fact equivalent.

  3. Fast Model Generalized Pseudopotential Theory (MGPT) Interatomic Potential Routine

    Energy Science and Technology Software Center (OSTI)

    2015-03-18

    MGPT is an unclassified source code for the fast evaluation and application of quantum-based MGPT interatomic potentials for mrtals. The present version of MGPT has been developed entirely at LLNL, but is specifically designed for implementation in the open-source molecular0dynamics code LAMMPS maintained by Sandia National Laboratories. Using MGPT in LAMMPS, with separate input potential data, one can perform large-scale atomistic simulations of the structural, thermodynamic, defeat and mechanical properties of transition metals with quantum-mechanicalmore » realism.« less

  4. Simple and accurate correlation of experimental redox potentials and

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

    DFT-calculated HOMO/LUMO energies of polycyclic aromatic hydrocarbons Simple and accurate correlation of experimental redox potentials and DFT-calculated HOMO/LUMO energies of polycyclic aromatic hydrocarbons Authors: Méndez-Hernández, D.D,, Tarakeshwar, P., Gust, D,. Moore,T.A., Moore, A.L., Mujica, V. Title: Simple and accurate correlation of experimental redox potentials and DFT-calculated HOMO/LUMO energies of polycyclic aromatic hydrocarbons Source: Journal of Molecular modeling Year:

  5. A study of algal biomass potential in selected Canadian regions.

    SciTech Connect (OSTI)

    Passell, Howard David; Roach, Jesse Dillon; Klise, Geoffrey T.

    2011-11-01

    A dynamic assessment model has been developed for evaluating the potential algal biomass and extracted biocrude productivity and costs, using nutrient and water resources available from waste streams in four regions of Canada (western British Columbia, Alberta oil fields, southern Ontario, and Nova Scotia). The purpose of this model is to help identify optimal locations in Canada for algae cultivation and biofuel production. The model uses spatially referenced data across the four regions for nitrogen and phosphorous loads in municipal wastewaters, and CO{sub 2} in exhaust streams from a variety of large industrial sources. Other data inputs include land cover, and solar insolation. Model users can develop estimates of resource potential by manipulating model assumptions in a graphic user interface, and updated results are viewed in real time. Resource potential by location can be viewed in terms of biomass production potential, potential CO{sub 2} fixed, biocrude production potential, and area required. The cost of producing algal biomass can be estimated using an approximation of the distance to move CO{sub 2} and water to the desired land parcel and an estimation of capital and operating costs for a theoretical open pond facility. Preliminary results suggest that in most cases, the CO{sub 2} resource is plentiful compared to other necessary nutrients (especially nitrogen), and that siting and prospects for successful large-scale algae cultivation efforts in Canada will be driven by availability of those other nutrients and the efficiency with which they can be used and re-used. Cost curves based on optimal possible siting of an open pond system are shown. The cost of energy for maintaining optimal growth temperatures is not considered in this effort, and additional research in this area, which has not been well studied at these latitudes, will be important in refining the costs of algal biomass production. The model will be used by NRC-IMB Canada to identify promising locations for both demonstration and pilot-scale algal cultivation projects, including the production potential of using wastewater, and potential land use considerations.

  6. Assessing the Potential for Renewable Energy on Public Lands

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

    The Potential For Renewable Energy On Public Lands February 2003 U.S. Department of the Interior Bureau of Land Management U.S. Department of Energy Energy Efficiency and Renewable Energy Download CD ZIP File (248 MB) Download CD-Lite ZIP File with no GIS Data or Acrobat Reader Installers (43 MB) CD-Lite Version Assessing The Potential For Renewable Energy On Public Lands U.S. Department of the Interior Bureau of Land Management U.S. Department of Energy Energy Efficiency and Renewable Energy

  7. CRC handbook of agricultural energy potential of developing countries

    SciTech Connect (OSTI)

    Duke, J.A.

    1986-01-01

    This book provides background information on the agroenergetic potential of 65 countries and offers summaries of major crops planted, total area planted, yield per hectare, and total production. Total land area is categorized as to agriculture, forest, and woodland, and is discussed with demographic statistics for each country. The potential for agricultural by-products and biomass to contribute to energy availability is explored, with reference to each major crop. Vegetation and/or economic activity, or soil maps are presented for most countries, as are climatic data, with crop yields and residues which are compared with production elsewhere.

  8. Stabilization of solitons under competing nonlinearities by external potentials

    SciTech Connect (OSTI)

    Zegadlo, Krzysztof B. Karpierz, Miroslaw A.; Wasak, Tomasz; Trippenbach, Marek; Malomed, Boris A.

    2014-12-15

    We report results of the analysis for families of one-dimensional (1D) trapped solitons, created by competing self-focusing (SF) quintic and self-defocusing (SDF) cubic nonlinear terms. Two trapping potentials are considered, the harmonic-oscillator (HO) and delta-functional ones. The models apply to optical solitons in colloidal waveguides and other photonic media, and to matter-wave solitons in Bose-Einstein condensates loaded into a quasi-1D trap. For the HO potential, the results are obtained in an approximate form, using the variational and Thomas-Fermi approximations, and in a full numerical form, including the ground state and the first antisymmetric excited one. For the delta-functional attractive potential, the results are produced in a fully analytical form, and verified by means of numerical methods. Both exponentially localized solitons and weakly localized trapped modes are found for the delta-functional potential. The most essential conclusions concern the applicability of competing Vakhitov-Kolokolov (VK) and anti-VK criteria to the identification of the stability of solitons created under the action of the competing SF and SDF terms.

  9. Proteins' Amazing Origami Powers: Insight for Potential Disease Treatments

    Broader source: Energy.gov [DOE]

    Better knowledge of protein folding could in turn provide more insight into the diseases associated with malformed proteins, such as Alzheimer's and Cystic Fibrosis, and potential fixes for those malformations. That in turn could lead to new possibilities for new treatments.

  10. Biogas Potential on Long Island, New York: A Quantification Study

    SciTech Connect (OSTI)

    Mahajan, D.; Patel, S.; Tonjes, D.

    2011-08-25

    Biogas is the product of anaerobic digestion of waste, whether occurring spontaneously in landfills or under controlled conditions in digesters. Biogas is viewed as an important energy source in current efforts to reduce the use of fossil fuels and dependency on imported resources. Several studies on the assessment of biogas potential have been made at regional, national, and global scales. However, because it is not economically feasible to transport biogas feedstock over long distances, it is more appropriate to consider local waste sources for their potential to produce biogas. An assessment of the biogas potential on Long Island, based on the review of local landfills, wastewater treatment plants, solid waste generation and management, and agricultural waste, found that 234 x 10{sup 6} m{sup 3} of methane (CH{sub 4}) from biogas might be harvestable, although substantial barriers for complete exploitation exist. This number is equivalent to 2.52 TW-h of electricity, approximately 12% of fossil fuel power generation on Long Island. This work can serve as a template for other areas to rapidly create or approximate biogas potentials, especially for suburban U.S. locations that are not usually thought of as sources of renewable energy.

  11. Identification of 300 Area Contaminants of Potential Concern for Soil

    SciTech Connect (OSTI)

    R.W. Ovink

    2010-04-05

    This report documents the process used to identify source area contaminants of potential concern (COPCs) in support of the 300 Area remedial investigation/feasibility study (RI/FS) work plan. This report also establishes the exclusion criteria applicable for 300 Area use and the analytical methods needed to analyze the COPCs.

  12. Assessment of the Geothermal Potential Within the BPA Marketing Area.

    SciTech Connect (OSTI)

    Lund, John W.; Allen, Eliot D.

    1980-07-01

    The potential of geothermal energy is estimated that can be used for direct heat applications and electrical power generation within the Bonneville Power Administration (BPA) marketing area. The BPA marketing area includes three principal states of Oregon, Washington, and Idaho and portions of California, Montana, Wyoming, Nevada, and Utah bordering on these three states. This area covers approximately 384,000 square miles and has an estimated population of 6,760,000. The total electrical geothermal potential within this marketing area is 4077 MW/sub e/ from hydrothermal resources and 16,000 MW/sub e/ from igneous systems, whereas the total thermal (wellhead) potential is 16.15 x 10/sup 15/ Btu/y. Approximately 200 geothermal resource sites were initially identified within the BPA marketing area. This number was then reduced to about 100 sites thought to be the most promising for development by the year 2000. These 100 sites, due to load area overlap, were grouped into 53 composite sites; 21-3/4 within BPA preference customer areas and 31-1/4 within nonpreference customer areas. The geothermal resource potential was then estimated for high-temperature (> 302/sup 0/F = 150/sup 0/C), intermediate-temperature (194 to 302/sup 0/F = 90 to 150/sup 0/C), and low-temperature (< 194/sup 0/F = 90/sup 0/C) resources.

  13. Optimizing Interacting Potentials to Form Targeted Materials Structures

    SciTech Connect (OSTI)

    Torquato, Salvatore

    2015-09-28

    Conventional applications of the principles of statistical mechanics (the "forward" problems), start with particle interaction potentials, and proceed to deduce local structure and macroscopic properties. Other applications (that may be classified as "inverse" problems), begin with targeted configurational information, such as low-order correlation functions that characterize local particle order, and attempt to back out full-system configurations and/or interaction potentials. To supplement these successful experimental and numerical "forward" approaches, we have focused on inverse approaches that make use of analytical and computational tools to optimize interactions for targeted self-assembly of nanosystems. The most original aspect of our work is its inherently inverse approach: instead of predicting structures that result from given interaction potentials among particles, we determine the optimal potential that most robustly stabilizes a given target structure subject to certain constraints. Our inverse approach could revolutionize the manner in which materials are designed and fabricated. There are a number of very tangible properties (e.g. zero thermal expansion behavior), elastic constants, optical properties for photonic applications, and transport properties.

  14. Geospatial Analysis of Renewable Energy Technical Potential on Tribal Lands

    SciTech Connect (OSTI)

    Doris, E.; Lopez, A.; Beckley, D.

    2013-02-01

    This technical report uses an established geospatial methodology to estimate the technical potential for renewable energy on tribal lands for the purpose of allowing Tribes to prioritize the development of renewable energy resources either for community scale on-tribal land use or for revenue generating electricity sales.

  15. Evaluation of potential geopressure geothermal test sites in southern Louisiana

    SciTech Connect (OSTI)

    Bassiouni, Z.

    1980-04-01

    Six geopressured-geothermal prospects in southern Louisiana were studied in detail to assess their potential use as test sites for the production of geopressure-geothermal energy. Each of the six sites contains substantial quantities of energy. Three of these prospects, Grand Lake, Lake Theriot, and Bayou Hebert, appear to be suitable for a test site. A summary of the findings is presented.

  16. NWTC Helps Chart the World's Wind Resource Potential

    SciTech Connect (OSTI)

    2015-09-01

    Researchers at the National Renewable Energy Laboratory's (NREL's) National Wind Technology Center (NWTC) provide the wind industry, policymakers, and other stakeholders with applied wind resource data, information, maps, and technical assistance. These tools, which emphasize wind resources at ever-increasing heights, help stakeholders evaluate the wind resource and development potential for a specific area.

  17. Remote sensing for wind power potential: a prospector's handbook

    SciTech Connect (OSTI)

    Wade, J.E.; Maule, P.A.; Bodvarsson, G.; Rosenfeld, C.L.; Woolley, S.G.; McClenahan, M.R.

    1983-02-01

    Remote sensing can aid in identifying and locating indicators of wind power potential from the terrestrial, marine, and atmospheric environments (i.e.: wind-deformed trees, white caps, and areas of thermal flux). It is not considered as a tool for determining wind power potential. A wide variety of remotely sensed evidence is described in terms of the scale at which evidence of wind power can be identified, and the appropriate remote sensors for finding such evidence. Remote sensing can be used for regional area prospecting using small-scale imagery. The information from such small-scale imagery is most often qualitative, and if it is transitory, examination of a number of images to verify presistence of the feature may be required. However, this evidence will allow rapid screening of a large area. Medium-scale imagery provides a better picture of the evidence obtained from small-scale imagery. At this level it is best to use existing imagery. Criteria relating to land use, accessibility, and proximity of candidate sites to nearby transmission lines can also be effectively evaluated from medium-scale imagery. Large-scale imagery provides the most quantitative evidence of the strength of wind. Wind-deformed trees can be identified at a large number of sites using only a few hours in locally chartered aircraft. A handheld 35mm camera can adequately document any evidence of wind. Three case studies that employ remote sensing prospecting techniques are described. Based on remotely sensed evidence, the wind power potential in three geographically and climatically diverse areas of the United States is estimated, and the estimates are compared to actual wind data in those regions. In addition, the cost of each survey is discussed. The results indicate that remote sensing for wind power potential is a quick, cost effective, and fairly reliable method for screening large areas for wind power potential.

  18. Evaluation of Recharge Potential at Crater U5a (WISHBONE)

    SciTech Connect (OSTI)

    Richard H. French; Samuel L. Hokett

    1998-11-01

    Radionuclides are present both below and above the water table at the Nevada Test Site (NTS), as the result of underground nuclear testing. Mobilization and transport of radionuclides from the vadose zone is a complex process that is influenced by the solubility and sorption characteristics of the individual radionuclides, as well as the soil water flux. On the NTS, subsidence craters resulting from testing underground nuclear weapons are numerous, and many intercept surface water flows. Because craters collect surface water above the sub-surface point of device detonation, these craters may provide a mechanism for surface water to recharge the groundwater aquifer system underlying the NTS. Given this situation, there is a potential for the captured water to introduce contaminants into the groundwater system. Crater U5a (WISHBONE), located in Frenchman Flat, was selected for study because of its potentially large drainage area, and significant erosional features, which suggested that it has captured more runoff than other craters in the Frenchman Flat area. Recharge conditions were studied in subsidence crater U5a by first drilling boreholes and analyzing the collected soil cores to determine the soil properties and moisture conditions. This information, coupled with a 32-year precipitation record, was used to conduct surface and vaodse zone modeling. Surface water modeling predicted that approximately 13 ponding events had occurred during the life of the crater. Vadose zone modeling indicated that since the crater's formation approximately 5,900 m3 of water were captured by the crater. Of this total, approximately 5,200 m3 of potential recahrge may have occurred, and the best estimates of annual average potential recharge rates lie between 36 and 188 cm of water per year. The term potential is used here to indicate that the water is not technically recharged because it has not yet reached the water table.

  19. Derivation of an optical potential for statically deformed rare-earth nuclei from a global spherical potential

    SciTech Connect (OSTI)

    Nobre, G. P. A.; Palumbo, A.; Herman, M.; Brown, D.; Hoblit, S.; Dietrich, F. S.

    2015-02-25

    The coupled-channel theory is a natural way of treating nonelastic channels, in particular those arising from collective excitations characterized by nuclear deformations. A proper treatment of such excitations is often essential to the accurate description of experimental nuclear-reaction data and to the prediction of a wide variety of scattering observables. Stimulated by recent work substantiating the near validity of the adiabatic approximation in coupled-channel calculations for scattering on statically deformed nuclei, we explore the possibility of generalizing a global spherical optical model potential (OMP) to make it usable in coupled-channel calculations on this class of nuclei. To do this, we have deformed the Koning-Delaroche global spherical potential for neutrons, coupling a sufficient number of states of the ground state band to ensure convergence. We present an extensive study of the effects of collective couplings and nuclear deformations on integrated cross sections as well as on angular distributions for neutron-induced reactions on statically deformed nuclei in the rare-earth region. We choose isotopes of three rare-earth elements (Gd, Ho, W), which are known to be nearly perfect rotors, to exemplify the results of the proposed method. Predictions from our model for total, elastic and inelastic cross sections, as well as for elastic and inelastic angular distributions, are in reasonable agreement with measured experimental data. In conclusion, these results suggest that the deformed Koning-Delaroche potential provides a useful regional neutron optical potential for the statically deformed rare earth nuclei.

  20. NN inversion potentials intermediate energy proton-nucleus elastic scattering

    SciTech Connect (OSTI)

    Arellano, H.F.; Brieva, F.A.; Love, W.G.; Geramb, H.V. von

    1995-10-01

    Recently developed nucleon-nucleon interactions using the quantum inverse scattering method shed new fight on the off-shell properties of the internucleon effective force for nucleon-nucleus scattering. Calculations of proton elastic scattering from {sup 40}Ca and {sup 208}Pb in the 500 MeV region show that variations in off-shell contributions are determined to a great extent by the accuracy with which the nucleon-nucleon phase shifts are reproduced. The study is based on the full-folding approach to the nucleon-nucleus optical potential which allows a deep understanding of the interplay between on- and off-shell effects in nucleon scattering. Results and the promising extension offered by the inversion potentials beyond the range of validity of the low-energy internucleon forces will be discussed.

  1. Explicit Expressions for 3D Boundary Integrals in Potential Theory

    SciTech Connect (OSTI)

    Nintcheu Fata, Sylvain

    2009-01-01

    On employing isoparametric, piecewise linear shape functions over a flat triangular domain, exact expressions are derived for all surface potentials involved in the numerical solution of three-dimensional singular and hyper-singular boundary integral equations of potential theory. These formulae, which are valid for an arbitrary source point in space, are represented as analytic expressions over the edges of the integration triangle. They can be used to solve integral equations defined on polygonal boundaries via the collocation method or may be utilized as analytic expressions for the inner integrals in the Galerkin technique. Also, the constant element approximation can be directly obtained with no extra effort. Sample problems solved by the collocation boundary element method for the Laplace equation are included to validate the proposed formulae.

  2. Radio frequency discharge with control of plasma potential distribution

    SciTech Connect (OSTI)

    Dudnikov, Vadim; Dudnikov, A.

    2012-02-15

    A RF discharge plasma generator with additional electrodes for independent control of plasma potential distribution is proposed. With positive biasing of this ring electrode relative end flanges and longitudinal magnetic field a confinement of fast electrons in the discharge will be improved for reliable triggering of pulsed RF discharge at low gas density and rate of ion generation will be enhanced. In the proposed discharge combination, the electron energy is enhanced by RF field and the fast electron confinement is improved by enhanced positive plasma potential which improves the efficiency of plasma generation significantly. This combination creates a synergetic effect with a significantly improving the plasma generation performance at low gas density. The discharge parameters can be optimized for enhance plasma generation with acceptable electrode sputtering.

  3. Radiolysis Model Formulation for Integration with the Mixed Potential Model

    SciTech Connect (OSTI)

    Buck, Edgar C.; Wittman, Richard S.

    2014-07-10

    The U.S. Department of Energy Office of Nuclear Energy (DOE-NE), Office of Fuel Cycle Technology has established the Used Fuel Disposition Campaign (UFDC) to conduct the research and development activities related to storage, transportation, and disposal of used nuclear fuel (UNF) and high-level radioactive waste. Within the UFDC, the components for a general system model of the degradation and subsequent transport of UNF is being developed to analyze the performance of disposal options [Sassani et al., 2012]. Two model components of the near-field part of the problem are the ANL Mixed Potential Model and the PNNL Radiolysis Model. This report is in response to the desire to integrate the two models as outlined in [Buck, E.C, J.L. Jerden, W.L. Ebert, R.S. Wittman, (2013) Coupling the Mixed Potential and Radiolysis Models for Used Fuel Degradation, FCRD-UFD-2013-000290, M3FT-PN0806058

  4. Policies to encourage private sector responses to potential climate change

    SciTech Connect (OSTI)

    Cantor, R.A.; Jones, D.W.; Leiby, P.N.; Rayner, S. )

    1989-01-01

    The Oak Ridge National Laboratory recently completed work on a report commissioned by the US Congress from the Department of Energy entitled A Compendium of Options for Government Policy to Encourage Private Sector Responses to Potential Climate Change'' (US DOE 1989). Four classes of incentives (regulatory, fiscal, informational, and RD D) were surveyed in the context of greenhouse-related activities in five economic sectors as depicted in Figure 1. As the example shows, for each activity general policies and specific options were considered. The paper presented here does not summarize the DOE study but identifies some of the lessons ORNL staff learned during the study about policies to deal with potential global warming. 21 refs., 1 fig.

  5. Assessing geothermal energy potential in upstate New York. Final report

    SciTech Connect (OSTI)

    Hodge, D.S.

    1996-08-01

    The potential of geothermal energy for future electric power generation in New York State is evaluated using estimates of temperatures of geothermal reservoir rocks. Bottom hole temperatures from over 2000 oil and gas wells in the region were integrated into subsurface maps of the temperatures for specific geothermal reservoirs. The Theresa/Potsdam formation provides the best potential for extraction of high volumes of geothermal fluids. The evaluation of the Theresa/Potsdam geothermal reservoir in upstate New York suggests that an area 30 miles east of Elmira, New York has the highest temperatures in the reservoir rock. The Theresa/Potsdam reservoir rock should have temperatures about 136 {degrees}C and may have as much as 450 feet of porosity in excess of 8%. Estimates of the volumes of geothermal fluids that can be extracted are provided and environmental considerations for production from a geothermal well is discussed.

  6. The relationship between polymer mobility and potential energy.

    SciTech Connect (OSTI)

    McCoy, John Dwane; Adolf, Douglas Brian; Budzien, Joanne L.

    2005-01-01

    The WLF equation is typically used to describe the dependence of polymer mobility on temperature at atmospheric pressure. Tests at different pressures would at least require different WLF parameterization. Completely different tests, for example, probing the temperature dependence of mobility at constant density, would require even greater modifications. By performing molecular dynamics simulations on simple chain molecules equilibrated at different thermodynamic states, we have shown that the mobility depends in a more general sense on the potential energy density of the system. That is, mobilities for any equilibrated state collapse onto one master curve when plotted against the potential energy density. Moreover, this relationship can be fit by either a 'generalized' WLF equation or by a power-law relationship observed in critical phenomena. When this mobility relationship is used within a rheologically simple, thermodynamically consistent, viscoelastic framework, quantitative agreement is seen between experimental data and theoretical predictions on a range of tests covering enthalpy relaxation to mechanical yield to physical aging.

  7. NREL Raises Rooftop Photovoltaic Technical Potential Estimate - News

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

    Releases | NREL NREL Raises Rooftop Photovoltaic Technical Potential Estimate New analysis nearly doubles previous estimates and shows U.S. building rooftops could generate close to 40 percent of national electricity sales March 24, 2016 Analysts at the Energy Department's National Renewable Energy Laboratory (NREL) have used detailed light detection and ranging (LiDAR) data for 128 cities nationwide, along with improved data analysis methods and simulation tools, to update its estimate of

  8. Spectral singularity in confined PT symmetric optical potential

    SciTech Connect (OSTI)

    Sinha, Anjana; Roychoudhury, R.

    2013-11-15

    We present an analytical study for the scattering amplitudes (Reflection ?R? and Transmission ?T?), of the periodic PT symmetric optical potential V(x)=W{sub 0}cos{sup 2}x+iV{sub 0}sin2x confined within the region 0 ?x?L, embedded in a homogeneous medium having uniform potential W{sub 0}. The confining length L is considered to be some integral multiple of the period ?. We give some new and interesting results. Scattering is observed to be normal (?T?{sup 2}? 1, ?R?{sup 2}? 1) for V{sub 0}? 0.5, when the above potential can be mapped to a Hermitian potential by a similarity transformation. Beyond this point (V{sub 0} > 0.5) scattering is found to be anomalous (?T?{sup 2}, ?R?{sup 2} not necessarily ?1). Additionally, in this parameter regime of V{sub 0}, one observes infinite number of spectral singularities E{sub SS} at different values of V{sub 0}. Furthermore, for L= 2n?, the transition point V{sub 0}= 0.5 shows unidirectional invisibility with zero reflection when the beam is incident from the absorptive side (Im[V(x)] < 0) but with finite reflection when the beam is incident from the emissive side (Im[V(x)] > 0), transmission being identically unity in both cases. Finally, the scattering coefficients ?R?{sup 2} and ?T?{sup 2} always obey the generalized unitarity relation : ?T|{sup 2}?1|=?(|R{sub R}|{sup 2}|R{sub L}|{sup 2}), where subscripts R and L stand for right and left incidence, respectively.

  9. D-dimensional Smorodinsky-Winternitz potential: Coherent state approach

    SciTech Connect (OSTI)

    Uenal, Nuri

    2013-10-15

    In this study, we construct the coherent states for a particle in the D-dimensional maximally superintegrable Smorodinsky-Winternitz potential. We, first, map the system into 2D harmonic oscillators, second, construct the coherent states of them by evaluating the transition amplitudes. Third, in the Cartesian and the hyperspherical coordinates, we find the coherent states and the stationary states of the original sytem by reduction.

  10. How does LANL estimate the potential dose to the public?

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

    Dose to the public How does LANL estimate the potential dose to the public? LANL calculates doses from two different maximally exposed individuals (MEIs): airborne-pathway and all-pathway. The limit that LANL is allowed to contribute is less than 10 millirem. Comparing Radiation Doses A maximally exposed individual, or MEI, is a hypothetical person located on the border of LANL property. MEI assumes the person eats food grown and drinks water found at the location, and also assumes the

  11. Importance of Iron Mineralogy to Aerosol Solubility: Potential Effects of

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

    Aerosol Source on Ocean Photosynthesis Importance of Iron Mineralogy to Aerosol Solubility: Potential Effects of Aerosol Source on Ocean Photosynthesis figure 1 Figure 1. Dust storm blowing glacial dusts from the Copper River Basin of southeast Alaska into the North Pacific Ocean, which depends on this and other external iron sources to support its biological communities. (Image: NASA MODIS satellite image, Nov. 1, 2006. http://earthobservatory.nasa.gov/IOTD/view.php?id=7094) Iron is one of

  12. Transportation Energy Futures Study Reveals Potential for Deep Cuts to

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

    Petroleum Use and Carbon Emissions - News Releases | NREL Transportation Energy Futures Study Reveals Potential for Deep Cuts to Petroleum Use and Carbon Emissions Collaborative NREL and ANL project reveals opportunities for 80% reductions by 2050 March 15, 2013 The U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) and Argonne National Laboratory (ANL) today announced the release of the Transportation Energy Futures (TEF) study, an assessment of avenues to reach

  13. Thermodynamic Evaluation of Low-Global Warming Potential Refrigerants |

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

    Department of Energy Refrigerants Thermodynamic Evaluation of Low-Global Warming Potential Refrigerants Credit: National Institute of Standards Credit: National Institute of Standards Lead Performer: National Institute of Standards and Technology - Gaithersburg, MD Partners: -- Catholic University of America - Washington, DC -- George Mason University - Fairfax, VA DOE Funding: $1,750,000 Cost Share: N/A Project Term: 2/1/2011 - 3/31/2015 Project Objective This project evaluates alternative

  14. New nano-mechanical plasmonic phase modulator offers electronics potential

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

    | Argonne National Laboratory nano-mechanical plasmonic phase modulator offers electronics potential April 3, 2015 Tweet EmailPrint By using standard semiconductor manufacturing equipment, a team of scientists from the U.S. Department of Energy's Argonne National Laboratory, the National Institute of Standards and Technology (NIST), Rutgers University and the University of Colorado at Colorado Springs, has demonstrated a nano-mechanical plasmon phase modulator that can control and manipulate

  15. New screening process for potentially cancer causing chemicals

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

    New screening process for potentially cancer causing chemicals Click to share on Facebook (Opens in new window) Click to share on Twitter (Opens in new window) Click to share on Reddit (Opens in new window) Click to share on Pinterest (Opens in new window) A better way to screen chemicals that may cause cancer is under development. This image shows in two dimensions what Berkeley lab scientists are working to achieve in three dimensions: cultures containing diverse cell types (seen here using

  16. National Microalgae Biofuel Production Potential and Resource Demand

    SciTech Connect (OSTI)

    Wigmosta, Mark S.; Coleman, Andre M.; Skaggs, Richard; Huesemann, Michael H.; Lane, Leonard J.

    2011-04-14

    Microalgae continue to receive global attention as a potential sustainable "energy crop" for biofuel production. An important step to realizing the potential of algae is quantifying the demands commercial-scale algal biofuel production will place on water and land resources. We present a high-resolution national resource and oil production assessment that brings to bear fundamental research questions of where open pond microalgae production can occur, how much land and water resource is required, and how much energy is produced. Our study suggests under current technology microalgae have the potential to generate 220 billion liters/year of oil, equivalent to 48% of current U.S. petroleum imports for transportation fuels. However, this level of production would require 5.5% of the land area in the conterminous U.S., and nearly three times the volume of water currently used for irrigated agriculture, averaging 1,421 L water per L of oil. Optimizing the selection of locations for microalgae production based on water use efficiency can greatly reduce total water demand. For example, focusing on locations along the Gulf Coast, Southeastern Seaboard, and areas adjacent to the Great Lakes, shows a 75% reduction in water demand to 350 L per L of oil produced with a 67% reduction in land use. These optimized locations have the potential to generate an oil volume equivalent to 17% of imports for transportation fuels, equal to the Energy Independence and Security Act year 2022 "advanced biofuels" production target, and utilizing some 25% of the current irrigation consumptive water demand for the U. S. These results suggest that, with proper planning, adequate land and water are available to meet a significant portion of the U.S. renewable fuel goals.

  17. Rooftop Solar Photovoltaic Technical Potential in the United States

    SciTech Connect (OSTI)

    Gagnon, Pieter; Margolis, Robert; Melius, Jennifer; Phillips, Caleb; Elmore, Ryan

    2016-01-01

    How much energy could we generate if PV modules were installed on all of the suitable roof area in the nation? To answer this question, we first use GIS methods to process a lidar dataset and determine the amount of roof area that is suitable for PV deployment in 128 cities nationwide, containing 23% of U.S. buildings, and provide PV-generation results for a subset of those cities. We then extend the insights from that analysis to the entire continental United States. We develop two statistical models -- one for small buildings and one for medium and large buildings -- and populate them with geographic variables that correlate with rooftop's suitability for PV. We simulate the productivity of PV installed on the suitable roof area, and present the technical potential of PV on both small buildings and medium/large buildings for every state in the continental US. Within the 128 cities covered by lidar data, 83% of small buildings have a location suitable for a PV installation, but only 26% of the total rooftop area of small buildings is suitable for development. The sheer number of buildings in this class, however, gives small buildings the greatest technical potential. Small building rooftops could accommodate 731 GW of PV capacity and generate 926 TWh/year of PV energy, approximately 65% of rooftop PV's total technical potential. We conclude by summing the PV-generation results for all building sizes and therefore answering our original question, estimating that the total national technical potential of rooftop PV is 1,118 GW of installed capacity and 1,432 TWh of annual energy generation. This equates to 39% of total national electric-sector sales.

  18. NREL: Photovoltaics Research - Potential of Perovskite Solar Cells Featured

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

    in Solar Today Potential of Perovskite Solar Cells Featured in Solar Today February 11, 2016 Familiar with perovskite solar cells? If not, you'll probably hear more about them soon. Perovskites are a family of materials receiving considerable attention by solar cell researchers due to the rapid rise of solar conversion efficiencies, increasing from about 4% to almost 22% in just six years. In an interview published in Solar Today (winter 2015 edition), Dr. Jao van de Lagemaat, director of

  19. NREL: Solar Research - Potential of Perovskite Solar Cells Featured in

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

    Solar Today Potential of Perovskite Solar Cells Featured in Solar Today February 11, 2016 Familiar with perovskite solar cells? If not, you'll probably hear more about them soon. Perovskites are a family of materials receiving considerable attention by solar cell researchers due to the rapid rise of solar conversion efficiencies, increasing from about 4% to almost 22% in just six years. In an interview published in Solar Today (winter 2015 edition), Dr. Jao van de Lagemaat, director of the

  20. Quantification of the Potential Impact on Commercial Markets of

    Energy Savers [EERE]

    Introduction of the Enrichment Services Component of DOE Low Enriched Uranium Inventory During Calendar Year 2013 | Department of Energy Introduction of the Enrichment Services Component of DOE Low Enriched Uranium Inventory During Calendar Year 2013 Quantification of the Potential Impact on Commercial Markets of Introduction of the Enrichment Services Component of DOE Low Enriched Uranium Inventory During Calendar Year 2013 This report presents the results of a business analysis performed