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  1. Tammy Ma

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

    tammy ma Tammy Ma Drawn to Science and Giving Back Tammy Ma Tammy Ma We sat down with Dr. Tammy Ma, an experimental physicist at the National Ignition Facility, to talk about what motivates her, why she loves science, her belief in giving back, and advice for younger scientists. Motivation and work ethic My mother, unfortunately, didn't get the chance to finish high school or go to college because she emigrated to Canada as a teenager. So it's always been instilled in both me and my younger

  2. DOE Power Administrations - Tammy Moreno | Department of Energy

    Energy Savers [EERE]

    Tammy Moreno DOE Power Administrations - Tammy Moreno Presented at the 15th Annual DOE Small Business Forum & Expo by: Tammy Moreno, Contracting Officer, Southwestern Power Administration, U.S. DOE DOE Power Administrations - Tammy Moreno (2.98 MB) More Documents & Publications Acquisition Forecast Download DOE Power Administrations - Marty Gault DOE Power Administrations - Byron McCollum

  3. Harris Walker | Department of Energy

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

    Harris Walker About Us Harris Walker - Communications Specialist, Weatherization and Intergovernmental Program Most Recent Connecticut Weatherization Project Improves Lives, ...

  4. Walker Branch Watershed Ecosystems Data

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

    Walker Branch Watershed is located on the U. S. Department of Energy's Oak Ridge Reservation near Oak Ridge, in Anderson County, Tennessee. The Walker Branch Watershed Project began in 1967 under sponsorship of the U. S. Atomic Energy Commission (now the U. S. Department of Energy). Initially, the project centered primarily on the geologic and hydrologic processes that control the amounts and chemistry of water moving through the watershed. Past projects have included: • U. S. Department of Energy funded studies of watershed hydrology and forest nutrient dynamics • National Oceanic and Atmospheric Administration funded studies of forest micrometeorology • Studies of atmospheric deposition under the National Atmospheric Deposition Program • The International Biological Program Eastern Deciduous Forest Biome Project • National Science Foundation sponsored studies of trace element cycling and stream nutrient spiraling • Electric Power Research Institute funded studies of the effects of acidic deposition on canopy processes and soil chemistry. These projects have all contributed to a more complete understanding of how forest watersheds function and have provided insights into the solution of energy-related problems associated with air pollution, contaminant transport, and forest nutrient dynamics. This is one of a few sites in the world characterized by long-term, intensive environmental studies. The Walker Branch Watershed website at http://walkerbranch.ornl.gov/ provides maps, photographs, and data on climate, precipitation, atmospheric deposition, stream discharge and runoff, stream chemistry, and vegetation. [Taken from http://walkerbranch.ornl.gov/ABOUTAAA.HTM

  5. ORISE: Faculty Research Experiences - Dr. Jessie Walker

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

    Kierra Smith, Jessie Walker, and Tarsheika West Students Kierra Smith (left) and Tarsheika West (right) cultivated their interest in cyber security this summer at the U.S. ...

  6. Walker Branch Watershed Ecosystems Data

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

    These projects have all contributed to a more complete understanding of how forest watersheds function and have provided insights into the solution of energy-related problems associated with air pollution, contaminant transport, and forest nutrient dynamics. This is one of a few sites in the world characterized by long-term, intensive environmental studies. The Walker Branch Watershed website at http://walkerbranch.ornl.gov/ provides maps, photographs, and data on climate, precipitation, atmospheric deposition, stream discharge and runoff, stream chemistry, and vegetation. [Taken from http://walkerbranch.ornl.gov/ABOUTAAA.HTM

  7. Walker-Lane Transition Zone Geothermal Region | Open Energy Informatio...

    Open Energy Info (EERE)

    At Walker-Lane Transitional Zone Region (Coolbaugh, Et Al., 2005 - 2) Direct-Current Resistivity Survey At Walker-Lane Transitional Zone Region (Pritchett,...

  8. Geodetic Survey At Walker-Lane Transitional Zone Region (Laney...

    Open Energy Info (EERE)

    Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geodetic Survey At Walker-Lane Transitional Zone Region (Laney, 2005) Exploration...

  9. Modeling-Computer Simulations At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Walker-Lane Transitional Zone Region (Laney, 2005) Exploration...

  10. Modeling-Computer Simulations At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Walker-Lane Transitional Zone Region (Pritchett, 2004) Exploration...

  11. Modeling-Computer Simulations At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Walker-Lane Transitional Zone Region (Biasi, Et Al., 2009) Exploration...

  12. Walker-Lane Transition Zone Geothermal Region | Open Energy Informatio...

    Open Energy Info (EERE)

    Geothermal Area Wilson Hot Spring Geothermal Area Winnemucca Dry Lake Geothermal Area Energy Generation Facilities within the Walker-Lane Transition Zone Geothermal Region...

  13. Ground Gravity Survey At Walker Lake Valley Area (Shoffner, Et...

    Open Energy Info (EERE)

    N. Hinz, A. Sabin, M. Lazaro, S. Alm (2010) Understanding Fault Characteristics And Sediment Depth For Geothermal Exploration Using 3D Gravity Inversion In Walker Valley, Nevada...

  14. Data Acquisition-Manipulation At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    (Coolbaugh, Et Al., 2005 - 2) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Data Acquisition-Manipulation Activity...

  15. Geodetic Survey At Walker-Lane Transitional Zone Region (Blewitt...

    Open Energy Info (EERE)

    Zone Region (Blewitt Et Al, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Geodetic Survey Activity Date...

  16. Field Mapping At Walker-Lane Transitional Zone Region (Shevenell...

    Open Energy Info (EERE)

    Region (Shevenell, Et Al., 2008) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Field Mapping Activity Date Usefulness...

  17. Field Mapping At Walker-Lane Transitional Zone Region (Blewitt...

    Open Energy Info (EERE)

    Zone Region (Blewitt Et Al, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Field Mapping Activity Date Usefulness...

  18. Teleseismic-Seismic Monitoring At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    Zone Region (Biasi, Et Al., 2009) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Teleseismic-Seismic Monitoring Activity...

  19. Compound and Elemental Analysis At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    Zone Region (Laney, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Compound and Elemental Analysis...

  20. Isotopic Analysis At Walker-Lane Transitional Zone Region (Laney...

    Open Energy Info (EERE)

    Zone Region (Laney, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Isotopic Analysis- Fluid Activity Date...

  1. Teleseismic-Seismic Monitoring At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    Zone Region (Biasi, Et Al., 2008) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Teleseismic-Seismic Monitoring Activity...

  2. Geothermometry At Walker-Lane Transitional Zone Region (Shevenell...

    Open Energy Info (EERE)

    (Shevenell & De Rocher, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Geothermometry Activity Date Usefulness...

  3. Refraction Survey At Walker-Lane Transitional Zone Region (Heimgartner...

    Open Energy Info (EERE)

    Region (Heimgartner, Et Al., 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Refraction Survey Activity Date...

  4. Geographic Information System At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    Zone Region (Laney, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Geographic Information System Activity...

  5. Geothermometry At Walker-Lane Transitional Zone Region (Laney...

    Open Energy Info (EERE)

    Zone Region (Laney, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Geothermometry Activity Date Usefulness...

  6. Walker County, Alabama: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Walker County, Alabama: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 33.8563605, -87.3016132 Show Map Loading map... "minzoom":false,"mappin...

  7. Water Sampling At Walker-Lane Transitional Zone Region (Laney...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Water Sampling At Walker-Lane Transitional Zone Region (Laney, 2005) Exploration Activity...

  8. Geothermal Literature Review At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At Walker-Lane Transitional Zone Region (Laney, 2005) Exploration Activity...

  9. Modeling-Computer Simulations (Walker, Et Al., 2005) | Open Energy...

    Open Energy Info (EERE)

    occurrence model for geothermal systems based on fundamental geologic data. References J. D. Walker, A. E. Sabin, J. R. Unruh, J. Combs, F. C. Monastero (2005) Development Of...

  10. WBA-13-0015- In the Matter of Sherrie Walker

    Broader source: Energy.gov [DOE]

    This Decision considers an Appeal of a Dismissal issued by the Office of Hearings and Appeals (OHA) of the Department of Energy (DOE) on December 5, 2013, of a Complaint filed by Sherrie Walker ...

  11. Field Mapping At Walker Lake Valley Area (Shoffner, Et Al., 2010...

    Open Energy Info (EERE)

    N. Hinz, A. Sabin, M. Lazaro, S. Alm (2010) Understanding Fault Characteristics And Sediment Depth For Geothermal Exploration Using 3D Gravity Inversion In Walker Valley, Nevada...

  12. InSAR At Walker-Lane Transitional Zone Region (Laney, 2005) ...

    Open Energy Info (EERE)

    Zone Region (Laney, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique InSAR Activity Date Usefulness useful...

  13. Anisotropic evolution of 5D Friedmann-Robertson-Walker spacetime

    SciTech Connect (OSTI)

    Middleton, Chad A.; Stanley, Ethan

    2011-10-15

    We examine the time evolution of the five-dimensional Einstein field equations subjected to a flat, anisotropic Robertson-Walker metric, where the 3D and higher-dimensional scale factors are allowed to dynamically evolve at different rates. By adopting equations of state relating the 3D and higher-dimensional pressures to the density, we obtain an exact expression relating the higher-dimensional scale factor to a function of the 3D scale factor. This relation allows us to write the Friedmann-Robertson-Walker field equations exclusively in terms of the 3D scale factor, thus yielding a set of 4D effective Friedmann-Robertson-Walker field equations. We examine the effective field equations in the general case and obtain an exact expression relating a function of the 3D scale factor to the time. This expression involves a hypergeometric function and cannot, in general, be inverted to yield an analytical expression for the 3D scale factor as a function of time. When the hypergeometric function is expanded for small and large arguments, we obtain a generalized treatment of the dynamical compactification scenario of Mohammedi [Phys. Rev. D 65, 104018 (2002)] and the 5D vacuum solution of Chodos and Detweiler [Phys. Rev. D 21, 2167 (1980)], respectively. By expanding the hypergeometric function near a branch point, we obtain the perturbative solution for the 3D scale factor in the small time regime. This solution exhibits accelerated expansion, which, remarkably, is independent of the value of the 4D equation of state parameter w. This early-time epoch of accelerated expansion arises naturally out of the anisotropic evolution of 5D spacetime when the pressure in the extra dimension is negative and offers a possible alternative to scalar field inflationary theory.

  14. A coupled theory of tropical climatology: Warm pool, cold tongue, and Walker circulation

    SciTech Connect (OSTI)

    Zhengyu Liu; Boyin Huang

    1997-07-01

    Based on results from analytic and general circulation models, the authors propose a theory for the coupled warm pool, cold tongue, and Walker circulation system. The intensity of the coupled system is determined by the coupling strength, the local equilibrium time, and latitudinal differential heating. Most importantly, this intensity is strongly regulated in the coupled system, with a saturation level that can be reached at a modest coupling strength. The saturation west-east sea surface temperature difference (and the associated Walker circulation) corresponds to about one-quarter of the latitudinal differential equilibrium temperature. This regulation is caused primarily by the decoupling of the SST gradient from a strong ocean current. The author`s estimate suggests that the present Pacific is near the saturation state. Furthermore, the much weaker Walker circulation system in the Atlantic Ocean is interpreted as being the result of the influence of the adjacent land, which is able to extend into the entire Atlantic to change the zonal distribution of the trade wind. The theory is also applied to understand the tropical climatology in coupled GCM simulations, in the Last Glacial Maximum climate, and in the global warming climate, as well as in the regulation of the tropical sea surface temperature. 41 refs., 15 figs.

  15. Robert L. Fleischer, P. Buford Price, Robert M. Walker, 1971 | U.S. DOE

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

    Office of Science (SC) Robert L. Fleischer, P. Buford Price, Robert M. Walker, 1971 The Ernest Orlando Lawrence Award Lawrence Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's Ceremony The Life of Ernest Orlando Lawrence Contact Information The Ernest Orlando Lawrence Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1970's Robert L. Fleischer, P.

  16. 10 Questions with Geologist Tammy Dickinson | Department of Energy

    Office of Environmental Management (EM)

    ... in geology and planetary science, which is why I was at two NASA centers before coming to OSTP. I did NASA research on planetary science, and then I managed the program and ...

  17. Pore size distribution and methane equilibrium conditions at Walker Ridge Block 313, northern Gulf of Mexico

    SciTech Connect (OSTI)

    Bihani, Abhishek; Daigle, Hugh; Cook, Ann; Glosser, Deborah; Shushtarian, Arash

    2015-12-15

    Coexistence of three methane phases (liquid (L), gas (G), hydrate (H)) in marine gas hydrate systems may occur according to in-situ pressure, temperature, salinity and pore size. In sediments with salinity close to seawater, a discrete zone of three-phase (3P) equilibrium may occur near the base of the regional hydrate stability zone (RHSZ) due to capillary effects. The existence of a 3P zone influences the location of the bottom-simulating reflection (BSR) and has implications for methane fluxes at the base of the RHSZ. We studied hydrate stability conditions in two wells, WR313-G and WR313-H, at Walker Ridge Block 313 in the northern Gulf of Mexico. We determined pore size distributions (PSD) by constructing a synthetic nuclear magnetic resonance (NMR) relaxation time distribution. Correlations were obtained by non-linear regression on NMR, gamma ray, and bulk density logs from well KC-151 at Keathley Canyon. The correlations enabled construction of relaxation time distributions for WR313-G and WR313-H, which were used to predict PSD through comparison with mercury injection capillary pressure measurements. With the computed PSD, L+H and L+G methane solubility was determined from in-situ pressure and temperature. The intersection of the L+G and L+H curves for various pore sizes allowed calculation of the depth range of the 3P equilibrium zone. As in previous studies at Blake Ridge and Hydrate Ridge, the top of the 3P zone moves upwards with increasing water depth and overlies the bulk 3P equilibrium depth. In clays at Walker Ridge, the predicted thickness of the 3P zone is approximately 35 m, but in coarse sands it is only a few meters due to the difference in absolute pore sizes and the width of the PSD. The thick 3P zone in the clays may explain in part why the BSR is only observed in the sand layers at Walker Ridge, although other factors may influence the presence or absence of a BSR.

  18. Binding of formyl peptides to Walker 256 carcinosarcoma cells and the chemotactic response of these cells

    SciTech Connect (OSTI)

    Rayner, D.C.; Orr, F.W.; Shiu, R.P.

    1985-05-01

    N-Formylmethionylleucylphenylalanine (fMLP) induces chemotaxis in leukocytes, the response being mediated by peptide binding to a receptor on the plasma membrane. In tumor cells, this peptide has been reported to induce cellular swelling and chemotaxis in vitro and to enhance the localization of circulating tumor cells in vivo. In the Boyden chamber, the authors evaluated the migratory responses of Walker carcinosarcoma 256 cells to varying concentrations of fMLP. Sigmoidal dose-response curves were obtained with the dose of chemotactic factor that elicits a half-maximal chemotactic response of 5.0 +/- 2.5 X 10(-8) M. Checkerboard analysis indicated that these responses were dependent upon a concentration gradient of fMLP with increases in migration of circa 2 to 2.5 times that of random movement. To examine the binding of fMLP, the tumor cells were incubated with 5 X 10(-9) M fML-(/sup 3/H)P in Hanks balanced salt solution. Specific binding (0.5 to 1% of total radioligand, to whole cells inhibited by 5 X 10(-6) M fMLP) approached equilibrium after 4 to 6 h at 4 degrees C and after 6 to 10 h at 22 degrees C. Autoradiographic studies demonstrated heterogeneous binding of the peptide by tumor cells and also showed its intracellular localization. In homogenates of Walker cells prepared in 0.1 M Tris HCl, pH 7.4, with 10 mM MgCl2 and bovine serum albumin (1 mg/ml), specific binding of approximately 0.5% of total fML-(/sup 3/H)P reached equilibrium after 60 min at 4 degrees C. In whole cells and homogenates, binding was reversible by addition of unlabeled fMLP.

  19. Gaussian approximation of lambdaphi/sup 4/ theory in (3+1)-dimensional spatially flat Robertson-Walker space

    SciTech Connect (OSTI)

    Pohle, H.

    1989-03-15

    We investigate lambdaphi/sup 4/ theory within the Gaussian approximation in spatially flat Robertson-Walker space in 3+1 dimensions. After having performed an adiabatic expansion for one of the ansatz functions, we find that the renormalization of the energy-momentum tensor provides two additional constraints which have to be satisfied by the bare couplings. These conditions force the theory to be trivial after renormalization.

  20. Field studies of streamflow generation using natural and injected tracers on Bickford and Walker Branch Watersheds

    SciTech Connect (OSTI)

    Genereux, D.; Hemond, H. . Dept. of Civil Engineering); Mulholland, P. )

    1992-05-01

    Field studies of streamflow generation were undertaken on two forested watersheds, the West Road subcatchment of Bickford Watershed in central Massachusetts and the West Fork of Walker Branch Watershed in eastern Tennessee. A major component of the research was development of a two-stage methodology for the use of naturally-occurring {sup 222}Rn as a tracer. The first of the two stages was solving a mass-balance equation for {sup 222}Rn around a stream reach of interest in order to calculate Rn{sub q}, the {sup 222}Rn content of the lateral inflow to the reach; a conservative tracer (chloride) and a volatile tracer (propane) were injected into the study stream to account for lateral inflow to, and volatilization from, the study reach. The second stage involved quantitative comparison of Rn{sub q} to the measured {sup 222}Rn concentrations of different subsurface waters in order to assess how important these waters were in contributing lateral inflow to the stream reach.

  1. Studying methane migration mechanisms at Walker Ridge, Gulf of Mexico, via 3D methane hydrate reservoir modeling

    SciTech Connect (OSTI)

    Nole, Michael; Daigle, Hugh; Mohanty, Kishore; Cook, Ann; Hillman, Jess

    2015-12-15

    We have developed a 3D methane hydrate reservoir simulator to model marine methane hydrate systems. Our simulator couples highly nonlinear heat and mass transport equations and includes heterogeneous sedimentation, in-situ microbial methanogenesis, the influence of pore size contrast on solubility gradients, and the impact of salt exclusion from the hydrate phase on dissolved methane equilibrium in pore water. Using environmental parameters from Walker Ridge in the Gulf of Mexico, we first simulate hydrate formation in and around a thin, dipping, planar sand stratum surrounded by clay lithology as it is buried to 295mbsf. We find that with sufficient methane being supplied by organic methanogenesis in the clays, a 200x pore size contrast between clays and sands allows for a strong enough concentration gradient to significantly drop the concentration of methane hydrate in clays immediately surrounding a thin sand layer, a phenomenon that is observed in well log data. Building upon previous work, our simulations account for the increase in sand-clay solubility contrast with depth from about 1.6% near the top of the sediment column to 8.6% at depth, which leads to a progressive strengthening of the diffusive flux of methane with time. By including an exponentially decaying organic methanogenesis input to the clay lithology with depth, we see a decrease in the aqueous methane supplied to the clays surrounding the sand layer with time, which works to further enhance the contrast in hydrate saturation between the sand and surrounding clays. Significant diffusive methane transport is observed in a clay interval of about 11m above the sand layer and about 4m below it, which matches well log observations. The clay-sand pore size contrast alone is not enough to completely eliminate hydrate (as observed in logs), because the diffusive flux of aqueous methane due to a contrast in pore size occurs slower than the rate at which methane is supplied via organic methanogenesis

  2. Wind Walkers | Open Energy Information

    Open Energy Info (EERE)

    Partners Developer 5045 Wind Partners Energy Purchaser Alliant Energy Location Waukon IA Coordinates 43.2655101, -91.4863848 Show Map Loading map... "minzoom":false,"mappin...

  3. Monitoring of the Airport Calibration Pads at Walker Field, Grand...

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

    More Documents & Publications Field Calibration Facilities for Environmental Measurement of Radium, Thorium, and Potassium (October 2013) UMTRCA Sites Fact Sheet Long-Term ...

  4. Thermal Gradient Holes At Walker-Lane Transitional Zone Region...

    Open Energy Info (EERE)

    Date Usefulness not useful DOE-funding Unknown Notes NOTE: These are theoreticalcomputer simulation tests of various methods on eight hypothetical 'model' basing-and-range...

  5. Refraction Survey At Walker-Lane Transitional Zone Region (Laney...

    Open Energy Info (EERE)

    the first project year's budget was devoted to acquisition of seismic recording and computer equipment to support the collection of refraction data and dissemination of our...

  6. Self Potential At Walker-Lane Transitional Zone Region (Pritchett...

    Open Energy Info (EERE)

    Activity Date Usefulness useful DOE-funding Unknown Notes NOTE: These are theoreticalcomputer simulation tests of various methods on eight hypothetical 'model' basing-and-range...

  7. Magnetotellurics At Walker-Lane Transitional Zone Region (Pritchett...

    Open Energy Info (EERE)

    Activity Date Usefulness useful DOE-funding Unknown Notes NOTE: These are theoreticalcomputer simulation tests of various methods on eight hypothetical 'model' basing-and-range...

  8. Direct-Current Resistivity Survey At Walker-Lane Transitional...

    Open Energy Info (EERE)

    Activity Date Usefulness useful DOE-funding Unknown Notes NOTE: These are theoreticalcomputer simulation tests of various methods on eight hypothetical 'model' basing-and-range...

  9. Trace Element Analysis At Walker-Lane Transitional Zone Region...

    Open Energy Info (EERE)

    diagnostic lithogeochemical tool for geothermal exploration, the analysis of lithium and other elements in tufa deposits could serve as exploration guides for hot spring...

  10. Compound and Elemental Analysis At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    diagnostic lithogeochemical tool for geothermal exploration, the analysis of lithium and other elements in tufa deposits could serve as exploration guides for hot spring...

  11. Walker Lake Valley Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    and Environmental Issues Click "Edit With Form" above to add content Exploration History First Discovery Well Completion Date: Well Name: Location: Depth: Initial Flow...

  12. National Uranium Resource Evaluation: Walker Lake Quadrangle, California and Nevada

    SciTech Connect (OSTI)

    Durham, D.L.; Felmlee, J.K.

    1982-09-01

    The Miocene Relief Peak Formation occurs in the Sierra Nevada, where it consists mainly of andesitic flows, autobrecciated flows, and mudflows. However, fluviatile rocks are common in the lower part of the formation. They contain abundant carbonaceous material, are commonly permeable, and are interbedded with less permeable rocks. The Juniper mine, the principal uranium occurrence in the fluviatile rocks, reportedly has produced more than 20 tons of U/sub 3/O/sub 8/. Although rocks of the Relief Peak Formation lack aerial radiometric uranium anomalies and generally have only average uranium content away from uranium occurrences, the fluviatile rocks of the formation are considered favorable for uranium deposits because of their lithologic characteristics and uranium occurrences. Some areas of Tertiary sedimentary rocks presently are categorized as unfavorable for the required minimum endowment. They have some geologically favorable characteristics, however, as well as indications of industry exploration activities, and they may prove to be favorable as more information becomes available.

  13. Geographic Information System At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    generic Basin and Range systems based on Dixie Valley data that help to understand the nature of large scale constraints on the location and characteristics of the geothermal...

  14. Geographic Information System At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    David Blackwell, Gary Oppliger (2005) A Map Of Geothermal Potential For The Great Basin, Usa- Recognition Of Multiple Geothermal Environments Additional References Retrieved from...

  15. Data Acquisition-Manipulation At Walker-Lane Transitional Zone...

    Open Energy Info (EERE)

    References D. D. Blackwell, K. W. Wisian, M. C. Richards, Mark Leidig, Richard Smith, Jason McKenna (2003) Geothermal Resource Analysis And Structure Of Basin And Range...

  16. Walker Lake Valley Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Resource Estimate Mean Reservoir Temp: Estimated Reservoir Volume: Mean Capacity: USGS Mean Reservoir Temp: USGS Estimated Reservoir Volume: USGS Mean Capacity: Click "Edit With...

  17. Isotopic Analysis At Walker-Lane Transitional Zone Region (Kennedy...

    Open Energy Info (EERE)

    ratios and active transtensional deformation indicates a deformation-enhanced permeability and that mantle fluids can penetrate the ductile lithosphere, even in regions where...

  18. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Bandwidth Aluminum Nitride Microresonator Filter. Olsson, Roy H., ; Pluym, Tammy ; Nguyen, Janet Abstract not provided. January 2013 Dispersion Engineering in Aluminum Nitride ...

  19. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Sandia National Laboratories SUMMiT VTM MEMS Process: Mature Technology with an Exciting Future. Pluym, Tammy Abstract not provided. March 2012 A Programmable Bandwidth Aluminum ...

  20. Subcontractor Resources

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

    Robin Reynolds Badging LANL TRU Program (LTP) - Mary Thronas Corrective Actions Program (CAP) - Tammie Fredenburg Records Debi Guffee Training Lisarae Lattin Resources Badge...

  1. Underground and Ventilation System

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

    - Joe Franco * Recovery Status - Tammy Reynolds * Audience Questions * In house * Internet * Closing Comments - Joe Franco 2 UPDATE ON CBFO AND WIPP ACTIVITIES Joe Franco, CBFO...

  2. award

    National Nuclear Security Administration (NNSA)

    Delgado-Goudschaal, Olivarez and Davis. Back row from left, Frances Tillery, Barbara Smith, Teresa Albus, Jeff Gillmore, Tammi Pedro, Randy Lucas, Ashley Hayton and Diane...

  3. SBA recognizes Pantex as a leader | National Nuclear Security...

    National Nuclear Security Administration (NNSA)

    Back row from left, Frances Tillery, Barbara Smith, Teresa Albus, Jeff Gillmore, Tammi ... can contract," said Compliance team lead Barbara Smith. Read more on the Pantex website. ...

  4. Town Hall Slides 9.4.14 FINAL.pptx

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

    * Recovery Planning Activities - Tammy Reynolds * Closing Comments - Dana Bryson * Audience Questions * One question at a time please RECOVERY UPDATE Dana Bryson, Deputy...

  5. EM, N.M. Officials Celebrate New Emergency Center for Waste Isolation...

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

    CARLSBAD, N.M. - Principal Deputy Assistant Secretary Mark Whitney joined New Mexico ... Recovery Manager Tammy Reynolds; New Mexico Environment Department Secretary Ryan ...

  6. In DC and Around the Nation: Join the National Day of Service...

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

    Eva Longoria, singer-songwriter Ben Folds, Iraq war veteran and Delaware Attorney General ... gospel singer Yolanda Adams, U.S. Rep and Iraq War veteran Tammy Duckworth, Philadelphia ...

  7. Microsoft Word - HAB_FINAL_Feb07_Summ.doc

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

    ... Curtis, Ecology Tammie Holm, EnviroIssues Eric Olds, DOE-ORP Laura Cusack, Ecology Hillary Johnson, EnviroIssues Shirley Olinger, DOE-ORP Dib Goswami, Ecology Penny Mabie, ...

  8. HANFORD ADVISORY BOARD

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

    ... Hedges, Ecology Tammie Holm, EnviroIssues Steve Wiegman, DOE-ORP Jeff Lyon, Ecology Hillary Johnson, EnviroIssues Jennifer Ollero, Ecology Penny Mabie, EnviroIssues Cameron ...

  9. ORSSAB Meeting - February 2014 | Department of Energy

    Office of Environmental Management (EM)

    4 ORSSAB Meeting - February 2014 Oak Ridge Site Specific Advisory Board meeting minutes and materials. FY 2016 DOE-Oak Ridge Environmental Management Program Budget and Prioritization - Tammy Blaine, DOE February ORSSAB agenda (44.87 KB) FY 2016 Oak Ridge EM Budget and Prioritization - Tammy Blaine, DOE (306.05 KB) Meeting Materials - February 2014 (572.08 KB) More Documents & Publications ORSSAB Meeting - March 2015 ORSSAB Meeting - March 2015 ORSSAB Meeting - March 2014

  10. ORSSAB Meeting - March 2014 | Department of Energy

    Office of Environmental Management (EM)

    4 ORSSAB Meeting - March 2014 Oak Ridge Site Specific Advisory Board meeting minutes and materials. "FY 2016 DOE-Oak Ridge Environmental Management Program Budget and Prioritization," Tammy Blaine, DOE. March ORSSAB agenda (173.51 KB) Meeting materials - March 2014 (733 KB) FY 2016 Oak Ridge EM Budget and Prioritization - Tammy Blaine, DOE (356.42 KB) Meeting minutes - March 2014.pdf (78.56 KB) More Documents & Publications ORSSAB Meeting - February 2015 ORSSAB Meeting - March 2015

  11. Town Hall Slides 3_27_14.pptx

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

    March 27, 2014 AGENDA ITEMS Joe Franco CBFO Manager Meeting Agenda * WIPP Status presentations * Tammy Reynolds * Fran Williams * Joe Franco * Audience Questions * One question at a time please * Final Remarks / Close WIPP RECOVERY PLAN ACTIVITIES Tammy Reynolds NWP Recovery Manager WIPP Recovery Plan Activities * Install a Continuous Air Monitor (CAM) at Station B * Provides real time radiological information on exhaust stack air * Installation to complete this week * One week run time to

  12. Town Hall Slides 4-10-14 FINAL.pptx

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

    0, 2014 Meeting Agenda *! Opening Comments - Mayor Janway *! Update on Entries, Additional Recovery Items - Dana Bryson, Tammy Reynolds *! Environmental Sampling - Stewart Jones *! Environmental Protection Agency *! Worth Noting - Dana Bryson *! Shipments to Waste Control Specialists *! Audience Questions *! One question at a time please UPDATE ON ENTRIES Dana Bryson, CBFO Deputy Manager Tammy Reynolds, NWP Deputy Recovery Manager Re-Entry Phase 1 Phase 2A Phase 2B Phase 3 *! Unmanned Entry *!

  13. Microsoft PowerPoint - Town Hall Slides 4_3_14

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

    April 03, 2014 AGENDA ITEMS Joe Franco CBFO Manager Meeting Agenda * Opening Comments - Mayor Janway * Overview of Underground Entry - Tammy Reynolds * Recovery Next Steps - Tammy Reynolds / Joe Franco * Waste Control Specialists (WCS) Contract and LANL Shipment Status - Bob McQuinn * Worth Mentioning - Joe Franco * WIPPTREX * Accident Investigation Board Report Status * Looking Ahead * Audience Questions * One question at a time please * Final Remarks / Close WIPP RECOVERY PLAN ACTIVITIES Joe

  14. Microsoft PowerPoint - Town Hall Slides 5-29-14

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

    29, 2014 Meeting Agenda * Opening Comments - Mayor Janway * Introductions / Guidelines - Carrie Meyer (Moderator) * CBFO Deputy Manager Remarks - Dana Bryson * Update on Recovery Activities - Tammy Reynolds * Audience Questions * One question at a time please OPENING COMMENTS Dana Bryson, CBFO Deputy Manager UPDATE ON RECOVERY ACTIVITIES Tammy Reynolds, NWP Deputy Recovery Manager Event Investigation Continues - May 22 Entry * We have identified one breached drum * The drum was confirmed as

  15. PTC-6 vacuum system: WallWalker{trademark} and Blastrac{reg_sign} shot blast cleaning system

    SciTech Connect (OSTI)

    1998-02-01

    The LTC Americas, Inc. wall decontamination technology consisted of two pneumatic hand-held tools: (1) a roto-peen scaler that used star cutters and (2) a 3-piston hammer with reciprocating bits. The hand-held tools were used in conjunction with the LTC PTC-6 vacuum system which captured dust and debris as the wall decontamination took place. Recommendations for improved worker safety and health during use of the PTC-6 vacuum system with hand-held tools include: (1) keeping all hoses and lines as orderly as possible in compliance with good housekeeping requirements; (2) ergonomic training to include techniques in lifting, bending, stooping, twisting, etc.; (3) use of a clamping system to hold hoses to the vacuum system; (4) a safety line on the air line connections; (5) use of a mechanical lifting system for waste drum removal; and (6) the use of ergonomically designed tools.

  16. NIF & PS People - 2016

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

    6 NIF & PS People - 2016 July Tammy Ma Cited for Plasma Physics Research NIF-MIT PhD Thesis Receives APS Award Meet Michael Sherburne: Future Electrical Engineer June NIF & PS Welcomes Summer Scholars May Félicie Albert Receives DOE Early Career Research Award NIF Technology Highlighted at Bay Area Maker Faire April Chris Barty Honored for Laser Science Work Allan Casey Named an IET Fellow March NIF Highlighted at My Brother's Keeper Event February Tammy Ma Wins Presidential Early

  17. SREL Reprint #3298

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

    8 Development and characterization of twenty-five microsatellite markers for the longnose dace (Cyprinidae: Rhinichthys) using paired-end Illumina shotgun sequencing Rochelle Beasley1, Stacey L. Lance1, Jennifer A. Ruskey2, and Eric B. Taylor2 1Savannah River Ecology Laboratory, University of Georgia, Aiken, SC 29802, USA 2Department of Zoology, Biodiversity Research Centre and Beaty Biodiversity Museum, University of British Columbia, 6270 University Blvd., Vancouver, BC V6T 1Z4, Canada

  18. Microsoft PowerPoint - Town Hall Slides 7-10-14 rev 0

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

    July 10, 2014 Meeting Agenda * Opening Comments - Mayor Janway * Introductions / Guidelines - Donavan Mager (Moderator) * Overview of Recovery Activities - Joe Franco * Recovery Update - Tammy Reynolds * Audience Questions * One question at a time please OVERVIEW OF RECOVERY ACTIVITIES Joe Franco, CBFO Manager Overview of Week's Activities * Finalizing recovery plan - next steps * Accident Investigation Board status * Defense Nuclear Facilities Safety Board (DNSFB) visit * Senator Tom Udall's

  19. Property:GeothermalRegion | Open Energy Information

    Open Energy Info (EERE)

    Power Plant + Upper Austrian Molasse Basin + Alum Geothermal Area + Walker-Lane Transition Zone + Alum Geothermal Project + Walker-Lane Transition Zone + Aluto-Langano...

  20. DOE Challenge Home Case Study: Southeast Volusia Habitat for...

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

    BUILDER PROFILE Southeast Volusia Co. Habitat for Humanity New Smyrna Beach, Florida Rosemary Walker, Executive Director rosemary.walker@yahoo.com, 386-428-5010 http:...

  1. DOE Zero Energy Ready Home Case Study: Southeast Volusia Habitat...

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

    BUILDER PROFILE Southeast Volusia Co. Habitat for Humanity New Smyrna Beach, Florida Rosemary Walker, Executive Director rosemary.walker@yahoo.com, 386-428-5010 http:...

  2. Three NNSA researchers receive President's highest early-career STEM

    National Nuclear Security Administration (NNSA)

    award | National Nuclear Security Administration | (NNSA) Three NNSA researchers receive President's highest early-career STEM award Thursday, May 5, 2016 - 10:35am Secretary of Energy Ernest Moniz, left, and NNSA Administrator Frank Klotz, right, join physicist Tammy Ma as she celebrates receiving a PECASE award for her work with the National Ignition Facility. Yesterday Secretary of Energy Ernest Moniz hosted a special ceremony honoring DOE's 13 recipients of the 2016 Presidential Early

  3. Hanford Natural Resource Trustees - Hanford Site

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

    Members About Us Hanford Cultural Resources Hanford Natural Resource Trustee Council HNRTC Members HNRTC History & Accomplishments Hanford Natural Resource Trustees Email Email Page | Print Print Page | Text Increase Font Size Decrease Font Size US Department of Energy - www.hanford.gov Primary Representative: Tom Post - (509) 376-3232 Alternate Representative: Janis Ward - (509) 376-2495 Fish and Wildlife Service - www.fws.gov Primary Representative: Tammy Ash - 509.893.8033 Alternate

  4. Underground and Ventilation System

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

    April 7, 2016 www.energy.gov/EM 2 Agenda * Opening Comments - Mayor Dale Janway * Introductory Statements - John Heaton (Moderator) * DOE-EM Remarks - Mark Whitney * Update on CBFO and WIPP - Todd Shrader * Preparations for Restart - Tammy Reynolds * EM-LA Established Corrective Actions - Doug Hintze * Questions and Answers - John Heaton * In house * Internet www.energy.gov/EM 3 DOE - Environmental Management Mark Whitney, Principal Deputy Assistant Secretary for Environmental Management

  5. Microsoft Word - Mpublic662_090622160606

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

    MICROSCALE C-SI (C)PV CELLS FOR LOW-COST POWER Gregory N. Nielson, Murat Okandan, Paul Resnick, Jose L. Cruz-Campa, Tammy Pluym, Peggy J. Clews, Elizabeth Steenbergen, Vipin P. Gupta Sandia National Laboratories ABSTRACT We are exploring fabrication and assembly concepts developed for Microsystems/MEMS technology to reduce the cost of solar PV power. These methods have the potential to reduce many system level costs of current PV systems including, among others, silicon material costs, module

  6. Microsoft PowerPoint - Salishan'06

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

    Computing'05 Informatics & HPC: Tomorrow's Applications Meet Yesterday's Technologies Bruce Hendrickson Jonathan Berry Will McLendon Tammy Kolda Sandia National Labs Discrete Algorithms & Math Department Salishan '06 Future DOE HPC Needs The past is mostly about physical simulation The future will be more diverse Data-centric computing is on the ascendancy » Experimental data » Simulation data » National security data Computing for decision support Future DOE HPC applications include

  7. Microsoft PowerPoint - Town Hall Slides 5-15-14 rev.0

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

    15, 2014 Meeting Agenda * Opening Comments - Mayor Janway * Panel Member Introductions - John Heaton (Moderator) * CBFO Manager Remarks - Dana Bryson * Update on Phase 3 Activities - Tammy Reynolds * May 10 Entry * Today's Entry * Ventilation System Status * Close-out of Bioassay Program - Jim Stafford * Audience Questions * One question at a time please OPENING COMMENTS Dana Bryson, CBFO Deputy Manager This Week's Events * Joe Franco in Washington * Town Hall Agenda * May 10 and May 15 Entries

  8. Microsoft PowerPoint - Town Hall Slides 6-05-14 rev. 2

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

    June 5, 2014 Meeting Agenda * Opening Comments - Mayor Janway * Introductions / Guidelines - Ben Williams (Moderator) * Overview of Week's Activities - Joe Franco * Update on Recovery Activities - Tammy Reynolds * Audience Questions * One question at a time please OPENING COMMENTS Joe Franco, CBFO Manager Overview of Week's Activities * May 30 th entry into the underground * Obtained samples for testing * Last entry into underground until filter change-out is complete * Filter change-out *

  9. Microsoft PowerPoint - Town_Hall_Slides_3_5_15_Final

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

    Carlsbad Town Hall Meeting Sponsored by the U.S. Department of Energy and the City of Carlsbad, NM March 5, 2015 www.energy.gov/EM 2 Agenda * Opening Comments - Mayor Dale Janway * Update on CBFO and WIPP activities - Dana Bryson * Recovery Status - Tammy Reynolds * Radiological Contamination - Jim Blankenhorn * Audience Questions * In house * Internet * Closing Comments - Dana Bryson www.energy.gov/EM 3 Update on CBFO and WIPP Activities Dana Bryson, CBFO Deputy Manager www.energy.gov/EM 4 *

  10. Microsoft Word - Document5

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

    Scientific Computing Group Tammy Welcome, Group Leader Mission The Scientific Computing Group will facilitate development of scientific applications than run on NERSC capability platforms and promote optimal use of NERSC resources. Responsibilities * Collaborate with strategic users to port and develop scientific applications * Evaluate, integrate, and create new hardware and software technologies * Evaluate, integrate, and create new new numerical and non-numerical algorithms * Aid in

  11. College Student Internship Program | Department of Energy

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

    Education & Training » College Student Internship Program College Student Internship Program 1 of 10 2011 interns pictured left to right at Sky City, traditional village of the Pueblo of Acoma: Devin Dick, Tammie Allen, Sandra Begay-Campbell, Gepetta Billie, and Chelsea Chee. 2 of 10 2014 interns Aaron Cate, Tommy Jones, and Len Necefer with supervisor Sandra Begay-Campbell. 3 of 10 2015 interns Tommy Jones, Kimberlynn Cameron, program adviser Sandra Begay-Campbell, Office of Indian Energy

  12. Subcontractor Resources

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

    Community, Environment » Environmental Stewardship » Subcontactor Resources Subcontractor Resources We make it easy for you to work for Environmental Programs. Contact Environmental Programs Directorate Office (505) 606-2337 Points of Contact Subcontracts Manager Robin Reynolds Badging LANL TRU Program (LTP) - Mary Thronas Corrective Actions Program (CAP) - Tammie Fredenburg Records Debi Guffee Training Lisarae Lattin Resources Badge request form (docx) Injury illness card (pdf) Laboratory

  13. Collins.ppt

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

    Education & Training » College Student Internship Program College Student Internship Program 1 of 10 2011 interns pictured left to right at Sky City, traditional village of the Pueblo of Acoma: Devin Dick, Tammie Allen, Sandra Begay-Campbell, Gepetta Billie, and Chelsea Chee. 2 of 10 2014 interns Aaron Cate, Tommy Jones, and Len Necefer with supervisor Sandra Begay-Campbell. 3 of 10 2015 interns Tommy Jones, Kimberlynn Cameron, program adviser Sandra Begay-Campbell, Office of Indian Energy

  14. Crystal Structures of the Human DNA Repair Protein AGT Bound to DNA

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

    Douglas S. Daniels1, Tammy T. Woo1, Kieu X. Luu2, David M. Noll3, Neil D. Clarke3, Anthony E. Pegg2, John A. Tainer1 1 Skaggs Institute for Chemical Biology, The Scripps Research Institute, MB-4, 10550 N. Torrey Pines Rd., La Jolla, California 92037, USA. 2 Department of Cellular and Molecular Physiology, Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033, USA. 3 Department of Biophysics and Biophysical Chemistry, Johns Hopkins University, School of Medicine, 725 N.

  15. EERE PowerPoint 97-2004 Template: Green Version

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

    ... techniques - Managed pressure drilling (offshore) - Underbalanced drilling techniques * Agua Caliente Walker Ranch drilling dataset * Integrate new team members - Graduating the ...

  16. Livingston Parish, Louisiana: Energy Resources | Open Energy...

    Open Energy Info (EERE)

    Louisiana French Settlement, Louisiana Killian, Louisiana Livingston, Louisiana Port Vincent, Louisiana Springfield, Louisiana Walker, Louisiana Retrieved from "http:...

  17. SPIE paper_v5_JLCCMarch1_2011

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

    of microsystem-enabled photovoltaic (MEPV) cells Gregory N. Nielson* a , Murat Okandan a , Jose L. Cruz-Campa a , Paul J. Resnick a , Mark W. Wanlass b , Peggy J. Clews a , Tammy C. Pluym a , Carlos A. Sanchez a , Vipin P. Gupta a , a Sandia National Laboratories, 1515 Eubank Blvd. SE, Albuquerque, NM USA 87123 b National Renewable Energy Laboratory, 1617 Cole Boulevard Golden, CO USA 80401 ABSTRACT Microsystem-Enabled Photovoltaic (MEPV) cells allow solar PV systems to take advantage of scaling

  18. Blount Partnership tours Y-12 | Y-12 National Security Complex

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

    Blount Partnership tours ... Blount Partnership tours Y-12 Posted: July 25, 2016 - 5:26pm CNS Supply Chain Manager Skip Skelton addresses Blount Partnership members at New Hope Center. Members of the Blount Partnership Chamber of Commerce toured the Y-12 National Security Complex. For most, it was their first time on the site. "What a great opportunity for our Chamber VIP members to learn about and see the Y-12 property," said Tammi Ford, vice president of the Blount Partnership. The

  19. DOE Office of Indian Energy Interns | Department of Energy

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

    DOE Office of Indian Energy Interns DOE Office of Indian Energy Interns Addthis 1 of 10 2011 interns pictured left to right at Sky City, traditional village of the Pueblo of Acoma: Devin Dick, Tammie Allen, Sandra Begay-Campbell, Gepetta Billie, and Chelsea Chee. 2 of 10 2014 interns Aaron Cate, Tommy Jones, and Len Necefer with supervisor Sandra Begay-Campbell. 3 of 10 2015 interns Tommy Jones, Kimberlynn Cameron, program adviser Sandra Begay-Campbell, Office of Indian Energy Director Chris

  20. Presentations

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

    State of NERSC address January 28, 1997 | Author(s): Horst SImon | Download File: State-of-NERSC-Address.pdf | pdf | 176 KB Report on Users' Questions about NERSC 1997 January 28, 1997 | Author(s): Ricky Kendall | Download File: Questions-for-the-ERSUG-Meeting.pdf | pdf | 80 KB Report on Graphics Packages January 28, 1997 | Author(s): Stephen Lau, Nancy Johnston, Terry Ligocki | Download File: NERSC1.pdf | pdf | 85 KB The Scientific Computing Group January 28, 1997 | Author(s): Tammy Welcome |

  1. Attendee List

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

    Attendee List Attendee List Here is a list of those in attendance in table order: 1. Ricky Kendall, Ames laboratory 2. Mike Minkoff, ANL 3. Brian Hingerty, ORNL 4. Doug Rotman, LLNL 5. David J. Dean, ORNL 6. Don Spong, ORNL 7. Viktok K. Decyk, UCLA 8. Robert Ryne, LANL 9. Ji Qiang, LANL 10. Sandy Merola, LBNL 11. Doug Olson, LBNL 12. Jim Craw, NERSC/LBNL 13. Greg Butler, NERSC/LBNL 14. Tammy S. Welcome, NERSC/LBNL 15. David H. Bailey, NERSC/LBNL 16. Alex Zunger, NREL 17. Bruce Ross, NOAA 18. Tom

  2. Federal Energy and Water Management Awards 2014

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

    Karen Curran, Mark Ewing, Lee Ann Walker, Steve Hochman, Brian Wright U.S. General ... General Services Administration Headquarters, 1800 F Street, NW, Washington, D.C

  3. Search for: thorium | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    ... Plutonium oxalate precipitation for trace elemental determination in plutonium materials Xu, Ning ; Gallimore, David ; Lujan, Elmer ; Garduno, Katherine ; Walker, Laurie ; Taylor, ...

  4. NREL-Renewable Energy Optimization Presentation | Open Energy...

    Open Energy Info (EERE)

    Organization: National Renewable Energy Laboratory Resource Type: Presentation, Training materials Website: www1.eere.energy.govfemppdfsrewg051909walker.pdf References:...

  5. Finding Hidden Geothermal Resources In The Basin And Range Using...

    Open Energy Info (EERE)

    Magnetotellurics At Walker-Lane Transitional Zone Region (Pritchett, 2004) Modeling-Computer Simulations At Central Nevada Seismic Zone Region (Pritchett, 2004) Modeling-Computer...

  6. Kent County, Michigan: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Michigan Lowell, Michigan Northview, Michigan Rockford, Michigan Sand Lake, Michigan Sparta, Michigan Walker, Michigan Wyoming, Michigan Retrieved from "http:en.openei.orgw...

  7. Search for: All records | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    Single-ion adsorption and switching in carbon nanotubes Bushmaker, Adam W. ; Oklejas, Vanessa ; Walker, Don ; Hopkins, Alan R. ; Chen, Jihan ; Cronin, Stephen B. Single-ion ...

  8. A Framework for Integrated Modeling of Perturbations in Atmospheres...

    Office of Scientific and Technical Information (OSTI)

    David M. 1 ; Koller, Josef 1 ; Lawrence, Earl C. 1 ; Palmer, David 1 ; Thompson, David C. 1 ; Walker, Andrew C. 1 ; Wohlberg, Brendt E. 1 + Show Author ...

  9. EECBG Success Story: Light Shines on Better Budget for Glendale...

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

    Energy Efficiency in New Mexico Frees Money in Local Coffers Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the ...

  10. EECBG Success Story: Maine Community Seeing Things in a New Light...

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

    Energy Efficiency in New Mexico Frees Money in Local Coffers Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the ...

  11. EECBG Success Story: While Summer Heats Up, Birmingham Community...

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

    Learn more. Addthis Related Articles Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the state's solar LED light pilot ...

  12. Nicaragua Canal Template

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

    School Amanda Pereira M.S., Urban and Regional Planning, University of ... University Genevieve Walker B.A., Geology, Florida International University BOOZ ...

  13. Single top production as a probe of heavy resonances | OSTI,...

    Office of Scientific and Technical Information (OSTI)

    Single top production as a probe of heavy resonances Not Available Temp HTML Storage 2: Drueke, Elizabeth; Nutter, Joseph; Schwienhorst, Reinhard; Vignaroli, Natascia; Walker, ...

  14. Vernon County, Missouri: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Moundville, Missouri Nevada, Missouri Richards, Missouri Schell City, Missouri Sheldon, Missouri Stotesbury, Missouri Walker, Missouri Retrieved from "http:en.openei.org...

  15. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Lavrik, Nickolay V (1) Palumbo, Anthony Vito (1) Taboada Serrano, Patricia L (1) Walker, ... David C ; Chung, Eunhyea ; Taboada Serrano, Patricia L ; Yiacoumi, Sotira ; Tsouris, ...

  16. Characterizing Structural Controls of EGS-Candidate and Conventional...

    Open Energy Info (EERE)

    systems in the Great Basin and adjacent regions. Phase I (Year 1) involves a broad inventory of structural settings of geothermal systems in the Great Basin, Walker Lane,...

  17. Understanding Fault Characteristics And Sediment Depth For Geothermal...

    Open Energy Info (EERE)

    Understanding Fault Characteristics And Sediment Depth For Geothermal Exploration Using 3D Gravity Inversion In Walker Valley, Nevada Jump to: navigation, search OpenEI Reference...

  18. Redfield Campus Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Overview Geothermal Area Profile Location: Nevada Exploration Region: Walker-Lane Transition Zone Geothermal Region GEA Development Phase: Resource Estimate Mean Reservoir Temp:...

  19. Hawthorne Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Overview Geothermal Area Profile Location: Nevada Exploration Region: Walker-Lane Transition Zone Geothermal Region GEA Development Phase: Coordinates: 38.53, -118.65...

  20. Wendel Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Geothermal Area Profile Location: California Exploration Region: Walker-Lane Transition Zone Geothermal Region GEA Development Phase: Operational"Operational" is not in the...

  1. Rhodes Marsh Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Overview Geothermal Area Profile Location: Nevada Exploration Region: Walker-Lane Transition Zone Geothermal Region GEA Development Phase: Resource Estimate Mean Reservoir Temp:...

  2. Wabuska Hot Springs Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Overview Geothermal Area Profile Location: Nevada Exploration Region: Walker-Lane Transition Zone Geothermal Region GEA Development Phase: Operational"Operational" is not in the...

  3. Property:Plants with Unknown Planned Capacity | Open Energy Informatio...

    Open Energy Info (EERE)

    Colorado Plateau Geothermal Region + 0 + Southern Rockies Geothermal Region + 0 + T Transition Zone Geothermal Region + 1 + W Walker-Lane Transition Zone Geothermal Region + 0 + Y...

  4. Wilson Hot Spring Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Overview Geothermal Area Profile Location: Nevada Exploration Region: Walker-Lane Transition Zone Geothermal Region GEA Development Phase: Coordinates: 38.7672, -119.1732...

  5. Benchmarking / Crosschecking DFS in the ILC Main Linac (Technical...

    Office of Scientific and Technical Information (OSTI)

    Poirier, Freddy ; Walker, Nicholas ; DESY ; Lebrun, Paul ; Ranjan, Kirti ; Fermilab ; Kubo, Kiyoshi ; KEK, Tsukuba ; Tenenbaum, Peter ; SLAC Publication Date: 2007-01-08 OSTI ...

  6. State of Play: How National and International Renewable Energy...

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

    SDE + * CfD * Renewable Obligation * Carbon Tax * Emissions Penalties Source: European Pellet Council Credit: Seth Walker RISI Renewable Fuel Standard It's all about market share....

  7. Nevada/Geothermal | Open Energy Information

    Open Energy Info (EERE)

    Confirmation Silver Peak Geothermal Area Walker-Lane Transition Zone Geothermal Region Smith Creek Geothermal Project Ormat Phase I - Resource Procurement and Identification Smith...

  8. In Charleston, U.S. Energy Department, Clemson Officials to Celebrate...

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

    Frank Knapp, President & CEO, South Carolina Small Business Chamber of Commerce Sandra Bridges, Palmetto Hammock and Resort Shoppe WHERE Pratt-Thomas Walker 16 Charlotte Street,...

  9. Role of double Ti O 2 layers at the interface of FeSe/ SrTi O...

    Office of Scientific and Technical Information (OSTI)

    Divine ; Lau, Claudia ; Simon, Georg H. ; Dagdeviren, Omur E. ; He, Xi ; Boovi, Ivan ; Schwarz, Udo D. ; Altman, Eric I. ; Feng, Donglai ; Walker, Fred J. ; Ismail-Beigi, ...

  10. Why Is Nevada in Hot Water? Structural Controls and Tectonic...

    Open Energy Info (EERE)

    Walker Lane, diffusing that motion into the Basin-Range. Abundant geothermal fields cluster in several northeasttrending belts in the northern Great Basin (e.g. Humboldt...

  11. Fermilab Today

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

    book display Fermilab Board Game Guild Wednesday Walkers Swim lessons at Fermilab Pool Adult water aerobics at Fermilab Pool Indoor soccer Submit an announcement Archives...

  12. Fermilab Today

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

    program begins - register now Wednesday Walkers Swim lessons at Fermilab Pool Adult water aerobics at Fermilab Pool Outdoor soccer Submit an announcement Archives...

  13. Four-Dimensional Data Assimilation D. Westphal, B. Toon, E. Jensen...

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

    B. Toon, E. Jensen, S. Kinne, A. Ackerman, R. Bergstrom, and A. Walker National Aeronautics and Space Administration Ames Research Center Moffett Field, CA 94035 Introduction...

  14. ARM_09STM_poster_kuang.ppt

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

    wave-convection interactions Zhiming Kuang, William Boos, Christopher Walker Harvard University kuang@fas.harvard.edu Motivation Limit domain CSRM or SCM (Moist...

  15. Bioenergy Feedstock Library and Least-Cost Formulation

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

    Garold Gresham Victor Walker (CoPI) Jeff Lacey (CoPI) Idaho National Laboratory This presentation does not contain any proprietary, confidential, or otherwise restricted ...

  16. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    sciences (142458) materials (129099) mathematical models (125681) fuels (123304) metals ... Laboratory Evaluation of Air Flow Measurement Methods for Residential HVAC Returns Walker, ...

  17. A multi-point radial photonic Doppler velocimetry (PDV) diagnostic...

    Office of Scientific and Technical Information (OSTI)

    Authors: Dolan, Daniel H., ; Lemke, Raymond W. ; Harding, Eric ; McBride, Ryan D ; Martin, Matthew ; Blue, Brent ; Walker, Scott S ; Dalton, Devon Gardner Publication Date: ...

  18. Science Summary

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

    about this research see the full Scientific Highlight R.S. Mathew-Fenn, R. Das, J.A. Silverman, P.A. Walker, P.A.B. Harbury, "A Molecular Ruler for Measuring Quantitative Distance...

  19. A Golden Ruler Used to Measure DNA Structure in Solution

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

    here for higher resolution image) Primary Citation: R.S. Mathew-Fenn, R. Das, J.A. Silverman, P.A. Walker, P.A.B. Harbury, "A Molecular Ruler for Measuring Quantitative Distance...

  20. This Week In Petroleum Summary Printer-Friendly Version

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    Desoto Canyon 48 5,876 2008 2013 Knotty Head Nexen Green Canyon 512 3,557 2005 2013 Big Foot Chevron Walker Ridge 29 5,235 2005 2014 Entrada ATP Garden Banks 782 4,531 2000...

  1. Methods for producing complex films, and films produced thereby...

    Office of Scientific and Technical Information (OSTI)

    N. ; Jellison Jr., Gerald E. ; Love, Lonnie J. ; Ott, Ronald D. ; Parish, Chad M. ; Walker, Steven Issue Date: 2015-11-24 OSTI Identifier: 1227865 Assignee: UT-BATTELLE, LLC ORO ...

  2. VOLUNTARY LEAVE TRANSFER PROGRAM

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

    ... Michele A. NA Roots, Nicole R. NA Valentin, Tamara NA Volger, Katherine M. NA Walker, Elizabeth M. NA Weber, Sally A. NA Becker, Melanie NE Morgan, Kelly NE Lyles, Monica ...

  3. Methods for producing complex films, and films produced thereby...

    Office of Scientific and Technical Information (OSTI)

    N. ; Jellison Jr., Gerald E. ; Love, Lonnie J. ; Ott, Ronald D. ; Parish, Chad M. ; Walker, Steven Publication Date: 2015-11-24 OSTI Identifier: 1227865 Report Number(s): ...

  4. Methods for producing complex films, and films produced thereby...

    Office of Scientific and Technical Information (OSTI)

    N. ; Jellison, Jr., Gerald E. ; Love, Lonnie J. ; Ott, Ronald D. ; Parish, Chad M. ; Walker, Steven Issue Date: 2015-11-24 OSTI Identifier: 1226808 Assignee: UT Battelle, LLC ...

  5. VOLUNTARY LEAVE TRANSFER PROGRAM

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

    ... Katherine M. NA Walker, Elizabeth M. NA Weber, Sally A. NA Becker, Melanie NE Morgan, Kelly NE Lyles, Monica D. OE Moore, Sharon M. OR Nance, Deborah L SC Mayes, Lynda A. SR

  6. DOE's effort to reduce truck aerodynamic drag : joint experiments...

    Office of Scientific and Technical Information (OSTI)

    Authors: Yaste, David M 1 ; Salari, Kambiz 2 ; Hammache, Mustapha 3 ; Browand, Fred 3 ; Pointer, W. David 4 ; Ortega, Jason M. 2 ; McCallen, Rose 2 ; Walker, Stephen ...

  7. VOLUNTARY LEAVE TRANSFER PROGRAM

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

    NA Walker, Elizabeth M. NA Weber, Sally A. NA Becker, Melanie NE Morgan, Kelly NE Lyles, Monica D. OE Moore, Sharon M. OR Nance, Deborah L SC Oyler, Dean E. SC Mayes, Lynda A. SR...

  8. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Zhang, Minghua (5) Del Genio, Anthony D. (4) Klein, Stephen A. (4) Lin, Wuyin (4) Walker, Gregory K. (4) Wolf, Audrey (4) Ackerman, Thomas P. (3) Golaz, Jean-Christophe (3) ...

  9. Microsoft PowerPoint - KLEIN_ARM_STM08_POSTER.ppt

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

    Sud, David Turner, Dana Veron, Knut von Salzen, Gregory Walker, Zhien Wang, Audrey Wolf, Shaocheng Xie, Kuan-Man Xu, Fanglin Yang, and Gong Zhang This poster presents the ...

  10. CX-004634: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Nevada- Tribe- Walker River Paiute TribeCX(s) Applied: B3.6, B5.1Date: 11/30/2010Location(s): NevadaOffice(s): Energy Efficiency and Renewable Energy

  11. Carlsbad Field Office P. O. Box 3090 Carlsbad

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

    questions regarding this transmittal. cc: )6se R. al1ager ( Carlsbad Field Office S. Holmes, NMED * ED T. Kliphuis , NMED ED R. Maestas, NMED ED C. Walker, Trinity Eng ineering...

  12. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Feenstra, R. M. (2) Gu, Gong (2) Park, Jewook (2) Zhang, Xiaoguang (2) Clark, Kendal W. (1) Gaan, S. (1) Towe, E. (1) Vlassiouk, Ivan V (1) Walker, J. (1) Zhang, X.-G. (1) Save ...

  13. July 2013 Most Viewed Documents for Fossil Fuels | OSTI, US Dept...

    Office of Scientific and Technical Information (OSTI)

    Its Control During Production of Alaska North Slope Oils Tao Zhu; Jack A. Walker; J. Liang (2008) 37 Life cycle inventory of biodiesel and petroleum diesel for use in an urban bus. ...

  14. Pilon: Automated Assembly Improvement Software (Seventh Annual Sequencing, Finishing, Analysis in the Future (SFAF) Meeting 2012)

    ScienceCinema (OSTI)

    Walker, Bruce (Broad Institute)

    2013-02-11

    Bruce Walker on "Pilon: Automated Assembly Improvement Software" at the 2012 Sequencing, Finishing, Analysis in the Future Meeting held June 5-7, 2012 in Santa Fe, New Mexico.

  15. Evolution of Extensional Basins and Basin and Range Topography...

    Open Energy Info (EERE)

    rather than high-angle normal faults. Authors K. V. Hodges, L. W. McKenna, J. Stock, J. Knapp, L. Page, K. Sternlof, D. Silverberg, G. Wst and J. D. Walker Published Journal...

  16. A Template for a Performance Assurance Plan

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

    ... Daniela Gorenxa Navy David McAndrew DOEFEMP Ed Anderson Florida Power & Light Bev Wade Navy, Mid-Atlantic Deb Vasquez NREL Kevin Johnson VectrenESG Andy Walker NREL Steve ...

  17. O

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

    Jharrod LaFon (HPC---3) Jim Williams (HPC---3) 2011 Computer System, Cluster, and Networking Summer Institute Russell Husted (MTU) Derek Walker (NCA&TSU) Povi Cruz ( NNMC)...

  18. Development Of Genetic Occurrence Models For Geothermal Prospecting...

    Open Energy Info (EERE)

    stages of exploration, from broad reconnaissance to detailed appraisal levels. Authors J. D. Walker, A. E. Sabin, J. R. Unruh, J. Combs and F. C. Monastero Published GRC, 2005...

  19. Toward The Development Of Occurrence Models For Geothermal Resources...

    Open Energy Info (EERE)

    in existing fields and grass-roots geothermal exploration Authors A. E. Sabin, J. D. Walker, J. Unruh and F. C. Monastero Published GRC, 2004 DOI Not Provided Check for...

  20. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Roodman, Aaron (1) Walker, Alistair R. (1) Worswick, Sue (1) Save Results Save this search to My Library Excel (limit 2000) CSV (limit 5000) XML (limit 5000) Have feedback or ...

  1. Title

    National Nuclear Security Administration (NNSA)

    ... SYSTEM (17) 106 Antelope Valley 107 Smith Valley 108 Mason Valley 109 East Walker ... Valley 133 EDWARDS CREEK VALLEY (19) 134 SMITH CREEK VALLEY (20) 123 RAWHIDE FLATS (21) ...

  2. Vapor Extraction Well Performance and Recommendations for Future...

    Office of Scientific and Technical Information (OSTI)

    No abstract provided. Authors: Jackson, D. 1 ; Hyde, W. 1 ; Walker, R. 1 ; Riha, B. 1 ; Ross, J. 1 ; Kramer, M. 1 + Show Author Affiliations Savannah River Site (SRS), ...

  3. Fermilab Today

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

    Top Links Labwide calendar Fermilab at Work Wilson Hall Cafe menu Chez Leon menu Weather ... Wednesday Walkers Wednesdays beginning May 6. Departs from the east side of Wilson Hall at ...

  4. VOLUNTARY LEAVE TRANSFER PROGRAM

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

    ... Walker, Elizabeth M. NA Weber, Sally A. NA Becker, Melanie NE Morgan, Kelly NE Lyles, Monica D. OE Moore, Sharon M. OR Nance, Deborah L SC Mayes, Lynda A. SR Bectel, Robert W. TT

  5. Friedmann equations from entropic force

    SciTech Connect (OSTI)

    Cai Ronggen; Cao Liming; Ohta, Nobuyoshi

    2010-03-15

    In this paper, by use of the holographic principle together with the equipartition law of energy and the Unruh temperature, we derive the Friedmann equations of a Friedmann-Robertson-Walker universe.

  6. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    (1) Iversen, Colleen (1) McGuire, Dave (1) Norby, Richard (1) Sloan, Victoria (1) Sullivan, Paddy (1) Walker, Anthony (1) Warren, Jeff (1) Wullschleger, Stan (1) Save Results...

  7. EECBG Success Story: Solar LED Light Pilot Project Illuminates the Way in

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

    Alabama | Department of Energy Solar LED Light Pilot Project Illuminates the Way in Alabama EECBG Success Story: Solar LED Light Pilot Project Illuminates the Way in Alabama September 12, 2012 - 2:15pm Addthis Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the state's solar LED light pilot project. | Photo courtesy of Lionel Green, Sand Mountain Reporter. Boaz, Alabama Mayor Tim Walker, along with state representatives and community

  8. Harrison_Poster

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

    Harris Walker About Us Harris Walker - Communications Specialist, Weatherization and Intergovernmental Program Most Recent Is Your Home as Ready for Summer as You Are? June 2 Connecticut Weatherization Project Improves Lives, Receives National Recognition May 6 New Year, New Certification Opportunities for Home Energy Workers January

    Harrison, Physics Department, South Dakota School of Mines and Technology; Rainer J. Fries, Cyclotron Institute, Texas A&M University; Steven Rose,

  9. Slide 1

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

    and Development of A Small Instrument To Investigate Airborne Aerosols Catherine F. Cahill Associate Professor Geophysical Institute and Department of Chemistry & Biochemistry University of Alaska Fairbanks Phone: 907-474-6905 Email: ffcfc@uaf.edu October 16, 2008 Gregory W. Walker Manager Poker Flat Research Range Geophysical Institute University of Alaska Fairbanks Phone: 907-455-2102 Email: Gregory.Walker@gi.alaska.edu In support of the US Army Research Laboratory Conducting Marine Mammal

  10. CASL-U-2015-0015-000 Modeling Integral Fuel

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

    5-000 Modeling Integral Fuel Burnable Absorbers Using the Method of Characteristics Erik Daniel Walker University of Tennessee, Knoxville December 1, 2014 CASL-U-2015-0015-000 University of Tennessee, Knoxville Trace: Tennessee Research and Creative Exchange Masters Theses Graduate School 12-2014 Modeling Integral Fuel Burnable Absorbers Using the Method of Characteristics Erik Daniel Walker University of Tennessee - Knoxville, ewalk@vols.utk.edu This Thesis is brought to you for free and open

  11. ARM - Publications: Science Team Meeting Documents

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

    Sub-Grid-Scale Isentropic Transports on McRAS Evaluations Using ARM-CART SCM Datasets Sud, Y.C., Walker, G.K., and Tao, W.-K., Climate and Radiation Branch, Laboratory for Atmospheres, NASA/Goddard Space Flight Center Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Influence of Sub-grid-Scale Isentropic Transports on McRAS: Evaluation using ARM-CART SCM Datasets. Y. C. Sud, G. K. Walker and W.-K. Tao In GCM-physics evaluations with the currently available ARM-CART SCM

  12. Untitled.pdf

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

    D.C. * Brussels * San Francisco * Shanghai www.khlaw.com KELLER AND HECKMAN LLP MEMORANDUM TO: Eric Stas U.S. Department of Energy FROM: Jean-Cyril Walker, Partner +1 202.434.4181 walker@khlaw.com DATE: April 8, 2015 RE: Ex Parte Communication re Energy Conservation Standards for Single Package Vertical Air Conditioners and Single Package Vertical Heat Pumps, 79 Fed. Reg. 78,614 (Dec. 30, 2014) (Docket No. EERE-2012-BT-STD-0041) This memorandum memorializes the meeting between National Comfort

  13. Note on gravitational baryogenesis

    SciTech Connect (OSTI)

    Sadjadi, H. Mohseni

    2007-12-15

    The coupling between Ricci scalar curvature and the baryon number current dynamically breaks CPT in an expanding universe and leads to baryon asymmetry. We study the effect of time dependence of the equation of state parameter of the Friedmann-Robertson-Walker universe on this asymmetry.

  14. TEXT ACCOMPANYING GMS46

    Office of Scientific and Technical Information (OSTI)

    ... Walker, G.W., MacLeod, N.S., McKee, E.H., and Smith, J.G., 1982, Index to K-Ar age ... A., Llewellyn, P.G., Pickton, C.A.G., Smith, A.C., , Walters, R., and Fancett, K.E., ...

  15. Binary Cycle Power Plant | Open Energy Information

    Open Energy Info (EERE)

    8.4e-6 TW 1986 Steamboat Springs Geothermal Area Walker-Lane Transition Zone Steamboat IA Geothermal Facility Ormat 2.95 MW2,950 kW 2,950,000 W 2,950,000,000 mW 0.00295 GW...

  16. University of Wisconsin - Madison | Department of Energy

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

    Wisconsin - Madison University of Wisconsin - Madison Team Roster: Austin Renfert, Real Estate and Entrepreneurship; Connor Sawyers, International Business and Marketing; Dustin Wahlquist, Finance and Entrepreneurship; Brigham Starks, Environmental Science; Zezhong Du, Agricultural Economics; Ian Berg, Civil and Environmental Engineering; Wilson Towne, Political Science and Economics; Walker Willis, Electrical Engineering; Joe Snodgrass, Electrical Engineering; Brent Grimm, Computer Engineering;

  17. NREL Helps Federal Agencies Reach New Efficiency Targets - News Feature |

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

    NREL Helps Federal Agencies Reach New Efficiency Targets August 19, 2015 Three people stand in front of solar panels on top of the NREL parking garage. NREL researchers, from left, Andy Walker, a principal engineer in the Integrated Applications Center's Engineering and Modeling Group; Kate Anderson, manager of the Engineering and Modeling Group; and Marguerite Kelly, manager of the Market Partnerships and Tools Group, are working to help federal agencies become more energy efficient as part

  18. ASCprospectus

    National Nuclear Security Administration (NNSA)

    ASC-ATP-001 July 2001 Simulation Development Environment Rusty Lusk / Argonne National Laboratory John Reynders / Sun Microsystems Scalable Solvers Paul Saylor / University of Illinois Jim Demmel / University of California Homer Walker / Worcester Polytechnic Institute Bill Gropp / Argonne National Laboratory Data Storage and File Systems Tom Ruwart / Ciprico Darrell Long / University of California / Santa Cruz Ben Kobler / NASA Goddard Space Flight Center Frameworks and Software Integration

  19. From Federal Computer Week:

    National Nuclear Security Administration (NNSA)

    Federal Computer Week: Energy agency launches performance-based pay system By Richard W. Walker Published on March 27, 2008 The Energy Department's National Nuclear Security Administration has launched a new performance- based pay system involving about 2,000 of its 2,500 employees. NNSA officials described the effort as a pilot project that will test the feasibility of the new system, which collapses the traditional 15 General Schedule pay bands into broader pay bands. The new structure

  20. SANDIA REPORT

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

    8019 September, 2015 Conceptual Framework for Developing Resilience Metrics for the Electricity, Oil, and Gas Sectors in the United States Jean-Paul Watson, Ross Guttromson, Cesar Silva-Monroy, Robert Jeffers, Katherine Jones, James Ellison, Charles Rath, Jared Gearhart, Dean Jones, Tom Corbet, Charles Hanley, La Tonya Walker Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and Livermore, California 94550 Sandia National Laboratories is a multi-program laboratory managed

  1. DE-FE0010175 | netl.doe.gov

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

    Planning of a Marine Methane Hydrate Pressure Coring Program for the Walker Ridge and Green Canyon Areas of the Gulf of Mexico Last Reviewed 11/27/2015 DE-FE0010175 Goal The primary goal of this research is to develop scientific, operational, and logistical plans for a future methane hydrate-focused offshore coring program, including a scope of work, technical specifications, and schedule and budget estimate needed to implement a marine expedition. Performers Fugro GeoConsulting, Inc., Houston

  2. Jobs Day and Nuclear Risk Insurance Announcement | Department of Energy

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

    Jobs Day and Nuclear Risk Insurance Announcement Jobs Day and Nuclear Risk Insurance Announcement August 4, 2006 - 8:41am Addthis Prepared Remarks for Energy Secretary Bodman Thank you all for being here and thanks, Mike, for that very nice introduction and for the tour of your transmission control center. I also want to thank Southern Company and Georgia Power for arranging this event and I appreciate Lauren Walker from Governor Perdue's office and Derick Corbett from Congressman Linder's

  3. fe0013919-UTAustin | netl.doe.gov

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

    METHANE HYDRATE PROJECTS Mechanisms for Methane Transport and Hydrate Accumulation in Coarse-Grained Reservoirs Last Reviewed 6/13/2016 DE-FE0013919 Goal The project goal is to evaluate whether the transport of methane, and the specific mechanism by which it is transported, are the primary controls on the development of persistent, massive hydrate accumulations in sediments below the seabed. The dissolved methane flux and time required to develop the accumulations observed at Walker Ridge Block

  4. MEMORANDUM To: DOE Office of General Counsel From: Tony Bacon

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

    To: DOE Office of General Counsel From: Tony Bacon Date: June 15, 2016 Re: Ex Parte Communication Memo This memo provides a summary of the communications made to the DOE staff regarding proposed rules on ceiling fan test procedures. The communications occurred during a teleconference on June 7, 2016. The meeting attendees included: Lucy Debutts (DOE) Ashley Armstrong (DOE) Bill Walker (Hunter Fan Company) Tony Bacon (Hunter Fan Company) Phil Daniels (Degree Controls, the company which supplies

  5. Modification to the luminosity distance redshift relation in modified gravity theories

    SciTech Connect (OSTI)

    Flanagan, Eanna E.; Rosenthal, Eran; Wasserman, Ira M.

    2009-02-15

    We derive an expression for the luminosity distance as a function of redshift for a flat Robertson-Walker spacetime perturbed by arbitrary scalar perturbations possibly produced by a modified gravity theory with two different scalar perturbation potentials. Measurements of the luminosity distance as function of redshift provide a constraint on a combination of the scalar potentials and so they can complement weak lensing and other measurements in trying to distinguish among the various alternative theories of gravity.

  6. Passive Solar Building Design and Solar Thermal Space Heating Webinar |

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

    Department of Energy Passive Solar Building Design and Solar Thermal Space Heating Webinar Passive Solar Building Design and Solar Thermal Space Heating Webinar Watch a recording of National Renewable Energy Laboratory (NREL) Senior Engineer Andy Walker's Nov. 30, 2010, presentation about passive solar building design, and solar thermal space heating technologies and applications. It's one in a series of Webinars to support state and local projects funded by Sustainable Energy Resources for

  7. From Glimmer to Fireball: Photographing Nuclear Detonations

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

    Federal Computer Week: Energy agency launches performance-based pay system By Richard W. Walker Published on March 27, 2008 The Energy Department's National Nuclear Security Administration has launched a new performance- based pay system involving about 2,000 of its 2,500 employees. NNSA officials described the effort as a pilot project that will test the feasibility of the new system, which collapses the traditional 15 General Schedule pay bands into broader pay bands. The new structure

  8. Federal Renewable Energy Projects and Technologies Contacts | Department of

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

    Energy Projects and Technologies Contacts Federal Renewable Energy Projects and Technologies Contacts For more information about federal renewable energy projects, contact: Contact Organization Specialty Rachel Shepherd 202-586-9209 Federal Energy Management Program Renewable energy program lead Emma Elgqvist 303-275-3606 National Renewable Energy Laboratory Renewable energy technical assistance Andy Walker 303-384-7531 National Renewable Energy Laboratory On-site renewable energy projects

  9. ARM - Publications: Science Team Meeting Documents

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

    Tropical Cloud Radiative Forcing and the Large-Scale Atmospheric Energy Transport Tian, B. (a) and Ramanathan, V. (b), Scripps Institution of Oceanography, UCSD Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Moist static energy is exported within the atmosphere column, from equatorial latitudes to the subtropics by the Hadley circulation and from the western Pacific warm pool to the eastern Pacific cold tongue by the Walker circulation. It is the net energy fluxes into the

  10. Solar Water Heating Webinar | Department of Energy

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

    Weatherization Assistance Program » Pilot Projects » Solar Water Heating Webinar Solar Water Heating Webinar Watch a recording of National Renewable Energy Laboratory (NREL) Senior Engineer Andy Walker's Nov. 16, 2010, presentation about residential solar water heating technologies and applications. It's one in a series of Webinars to support state and local projects funded by Sustainable Energy Resources for Consumers Grants. You can also read a transcript of the Webinar. More Information For

  11. Microsoft Word - FOI 2014-01310.FINAL.doc

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

    July 10, 2014 CERTIFIED MAIL Mr. Eric Eisinger Walker Heye Meehan & Eisinger, PLLC 1333 Columbia Park Trail, Suite 220 Richland, Washington 99352 Dear Mr. Eisinger: FREEDOM OF INFORMATION ACT REQUEST (FOI 2014-01310) This office is in receipt of your electronic Freedom of Information Act (FOIA) request for all subcontracts between Mission Support Alliance and R.J. Lee Group for the years 2000 through 2014. According to the U.S. Department of Energy's (DOE) contract with Mission Support

  12. Breaking Barriers Wildlife Refreshment

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

    Barriers Wildlife Refreshment Walker becomes first black battalion commander. NSTec Aviation Safety Officer, RSL team honored by DOE. NNSS helping wildlife with new watering holes. See pages 8. See page 4. NSTec and UNLV Bring Technology Community Together at PDV Workshop In June 2014, National Security Technologies (NSTec) and University Nevada, Las Vegas (UNLV) co- hosted a Photon Doppler Velocimetry (PDV) Workshop at the UNLV Science and Engineering Building (SEB). More than 125 attendees

  13. Career Day Entertainment Pleading Your Case

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

    Day Entertainment Pleading Your Case NvE experts share their knowledge with students. Ken Walker comes on-board to manage the new MAS directorate. Irwin coaches future lawyers in competition. See page 6. See page 5. Aerial Exercise Prepares Agencies to Respond to Rad/Nuc Emergencies It was a first for the National Nuclear Security Administration (NNSA) and the Nevada National Security Site (NNSS). The WINGS emergency response exercise, held at the NNSS's Desert Rock Airport March 25, brought

  14. Berkeley Lab scientists develop criteria for $20 million energy challenge

    ScienceCinema (OSTI)

    Walker, Iain

    2013-05-29

    Berkeley Labs Iain Walker and his colleagues in environmental energy research helped the Siebel Foundation develop the criteria for its Energy Free Home Challenge, which comes with a $20 million global incentive prize. The Challenge is a competition to create a new generation of systems and technologies for practical homes that realize a net-zero, non-renewable energy footprint without increasing the cost of ownership. It is open to everyone everywhere ? university teams to handymen and hobbyists.

  15. Berkeley Lab Answers Your Home Energy Efficiency Questions

    ScienceCinema (OSTI)

    Walker, Iain

    2013-11-14

    In this follow-up "Ask Berkeley Lab" video, energy efficiency expert Iain Walker answers some of your questions about home energy efficiency. How do you monitor which appliances use the most energy? Should you replace your old windows? Are photovoltaic systems worth the cost? What to do about a leaky house? And what's the single biggest energy user in your home? Watch the video to get the answers to these and more questions.

  16. Targeting Net Zero Energy at Marine Corps Base Kaneohe Bay, Hawaii: Assessment and Recommendations

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

    Targeting Net Zero Energy at Marine Corps Base Kaneohe Bay, Hawaii: Assessment and Recommendations K. Burman, A. Kandt, L. Lisell, S. Booth, A. Walker, J. Roberts and J. Falcey Technical Report NREL/ TP-7A40-52897 November 2011 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401 303-275-3000 *

  17. Text-Alternative Version of Building America Webinar: Technology-to-Market

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

    Roadmaps | Department of Energy Technology-to-Market Roadmaps Text-Alternative Version of Building America Webinar: Technology-to-Market Roadmaps Building America Technology-to-Market Roadmaps: Request for Information (RFI) Webinar April 7, 2015 Eric Werling - U.S. Department of Energy Jon Winkler - National Renewable Energy Laboratory Iain Walker - Lawrence Berkeley National Laboratory Roderick Jackson - Oak Ridge National Laboratory Gail: Hello everyone! I am Gail Werren with the National

  18. SASSI Analytical Methods Compared with SHAKE Free-Field Results

    Office of Environmental Management (EM)

    4-18019 September, 2015 Conceptual Framework for Developing Resilience Metrics for the Electricity, Oil, and Gas Sectors in the United States Jean-Paul Watson, Ross Guttromson, Cesar Silva-Monroy, Robert Jeffers, Katherine Jones, James Ellison, Charles Rath, Jared Gearhart, Dean Jones, Tom Corbet, Charles Hanley, La Tonya Walker Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and Livermore, California 94550 Sandia National Laboratories is a multi-program laboratory managed

  19. SEAB

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

    8019 September, 2015 Conceptual Framework for Developing Resilience Metrics for the Electricity, Oil, and Gas Sectors in the United States Jean-Paul Watson, Ross Guttromson, Cesar Silva-Monroy, Robert Jeffers, Katherine Jones, James Ellison, Charles Rath, Jared Gearhart, Dean Jones, Tom Corbet, Charles Hanley, La Tonya Walker Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and Livermore, California 94550 Sandia National Laboratories is a multi-program laboratory managed

  20. Cosmological solution moduli of bigravity

    SciTech Connect (OSTI)

    Yılmaz, Nejat Tevfik

    2015-09-29

    We construct the complete set of metric-configuration solutions of the ghost-free massive bigravity for the scenario in which the g−metric is the Friedmann-Lemaitre-Robertson-Walker (FLRW) one, and the interaction Lagrangian between the two metrics contributes an effective ideal fluid energy-momentum tensor to the g-metric equations. This set corresponds to the exact background cosmological solution space of the theory.

  1. Assessing 116 Deep Retrofits Across the U.S.

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

    ASSESSING 116 DEEP RETROFITS ACROSS THE U.S. By: Brennan Less & Iain Walker, LBNL, Residential Building Systems ACI National Home Performance Conference, Detroit, MI, 04/30/2014 Defining a Deep Energy Retrofit- Variable and Flexible 2  Comprehensive upgrades to the building enclosure, heating, cooling and hot water equipment.  Often incorporates appliance and lighting upgrades, plug load reductions, renewable energy and occupant conservation. % Reduction >50% Absolute Reduction

  2. Berkeley Lab scientists develop criteria for $20 million energy challenge

    SciTech Connect (OSTI)

    Walker, Iain

    2009-01-01

    Berkeley Labs Iain Walker and his colleagues in environmental energy research helped the Siebel Foundation develop the criteria for its Energy Free Home Challenge, which comes with a $20 million global incentive prize. The Challenge is a competition to create a new generation of systems and technologies for practical homes that realize a net-zero, non-renewable energy footprint without increasing the cost of ownership. It is open to everyone everywhere university teams to handymen and hobbyists.

  3. DOE's Gasoline/Diesel PM Split Study

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

    Gasoline/Diesel PM Split Study Douglas R. Lawson, National Renewable Energy Laboratory, Golden, CO Peter Gabele (retired), U.S. Environmental Protection Agency, Research Triangle Park, NC Richard Snow, BKI, Inc., Research Triangle Park, NC Nigel Clark, W. Scott Wayne, Ralph D. Nine, West Virginia University, Morgantown, WV Eric M. Fujita, Barbara Zielinska, William P. Arnott, David E. Campbell, John W. Walker, Hans Moosmüller, Desert Research Institute, Reno, NV Jamie Schauer, Charles

  4. REopt: A Platform for Energy System Integration and Optimization: Preprint

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

    REopt: A Platform for Energy System Integration and Optimization Preprint T. Simpkins, D. Cutler, K. Anderson, D. Olis, E. Elgqvist, M. Callahan, and A. Walker Presented at the 8th International Conference on Energy and Sustainability (ES2014) Boston, Massachusetts June 20 - July 2, 2014 Conference Paper NREL/CP-7A40-61783 August 2014 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy, LLC (Alliance), a contractor of the US Government under

  5. The Development and On-Road Performance and Durability of the Four-Way

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

    Emission Control SCRTTM System | Department of Energy The Development and On-Road Performance and Durability of the Four-Way Emission Control SCRTTM System The Development and On-Road Performance and Durability of the Four-Way Emission Control SCRTTM System 2003 DEER Conference Presentation: Johnson Matthey plc, Cummins Inc. 2003_deer_walker.pdf (535.28 KB) More Documents & Publications SCRT Technology for Retrofit of Heavy-Duty Diesel Applications Update on Diesel Exhaust Emission

  6. Posters

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

    7 Posters The Effects of Radiative Transfer in Maintaining the Indian Summer Monsoon M. J. Leach and S. Raman Department of Marine, Earth and Atmospheric Sciences North Carolina State University Raleigh, North Carolina Introduction Atmospheric radiative transfer is an important thermodynamic forcing for the Indian summer monsoon. The Indian summer monsoon is a component of a larger scale circulation system the principal components of which are the Hadley cell and the Walker Circulation. The

  7. ARM - Publications: Science Team Meeting Documents

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

    New Concepts for Improved Performance of Dynamical and Microphysical Parameterization of Clouds Sud, Y.C.(a) and Walker, G.K.(b), NASA/Laboratory for Atmospheres Goddard Space Flight Center Three new concepts were launched for: i) simulating more shallow convection, ii) capturing mid-level convection and iii) better simulating the boundary-layer convection forced boundary-layer clouds. Each process was prameterized and evaluated in the ARM-CART SCM environment. The individual and combined

  8. Underground coal gasification. Presentations

    SciTech Connect (OSTI)

    2007-07-01

    The 8 presentations are: underground coal gasification (UCG) and the possibilities for carbon management (J. Friedmann); comparing the economics of UCG with surface gasification technologies (E. Redman); Eskom develops UCG technology project (C. Gross); development and future of UCG in the Asian region (L. Walker); economically developing vast deep Powder River Basin coals with UCG (S. Morzenti); effectively managing UCG environmental issues (E. Burton); demonstrating modelling complexity of environmental risk management; and UCG research at the University of Queensland, Australia (A.Y. Klimenko).

  9. World class recreation, bold science

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

    World class recreation, bold science World class recreation, bold science Los Alamos employees enjoy access to a network of 100+ miles of high-quality trails, much of it within walking distance from key Lab facilities or from residents' front doors. April 3, 2012 Bikers (and LANL Postdocs) Brent and Pam in Los Alamos canyon riding hard on the trail Bikers (and LANL Postdocs) Brent and Pam in Los Alamos canyon riding hard on the trail. Hikers, mountain bikers, joggers, and dog walkers can wind

  10. Electric field driven magnetic domain wall motion in ferromagnetic-ferroelectric heterostructures

    SciTech Connect (OSTI)

    Van de Wiele, Ben; Laurson, Lasse; Franke, Kvin J. A.; Dijken, Sebastiaan van

    2014-01-06

    We investigate magnetic domain wall (MDW) dynamics induced by applied electric fields in ferromagnetic-ferroelectric thin-film heterostructures. In contrast to conventional driving mechanisms where MDW motion is induced directly by magnetic fields or electric currents, MDW motion arises here as a result of strong pinning of MDWs onto ferroelectric domain walls (FDWs) via local strain coupling. By performing extensive micromagnetic simulations, we find several dynamical regimes, including instabilities such as spin wave emission and complex transformations of the MDW structure. In all cases, the time-averaged MDW velocity equals that of the FDW, indicating the absence of Walker breakdown.

  11. Time-resolved observation of fast domain-walls driven by vertical spin currents in short tracks

    SciTech Connect (OSTI)

    Sampaio, Joao; Lequeux, Steven; Chanthbouala, Andre; Cros, Vincent; Grollier, Julie; Matsumoto, Rie; Yakushiji, Kay; Kubota, Hitoshi; Fukushima, Akio; Yuasa, Shinji; Nishimura, Kazumasa; Nagamine, Yoshinori; Maehara, Hiroki; Tsunekawa, Koji

    2013-12-09

    We present time-resolved measurements of the displacement of magnetic domain-walls (DWs) driven by vertical spin-polarized currents in track-shaped magnetic tunnel junctions. In these structures, we observe very high DW velocities (600 m/s) at current densities below 10{sup 7} A/cm{sup 2}. We show that the efficient spin-transfer torque combined with a short propagation distance allows avoiding the Walker breakdown process and achieving deterministic, reversible, and fast (≈1 ns) DW-mediated switching of magnetic tunnel junction elements, which is of great interest for the implementation of fast DW-based spintronic devices.

  12. Evolution of domain wall networks: The Press-Ryden-Spergel algorithm

    SciTech Connect (OSTI)

    Sousa, L.; Avelino, P. P.

    2010-04-15

    The Press-Ryden-Spergel (PRS) algorithm is a modification to the field theory equations of motion, parametrized by two parameters ({alpha} and {beta}), implemented in numerical simulations of cosmological domain wall networks, in order to ensure a fixed comoving resolution. In this paper we explicitly demonstrate that the PRS algorithm provides the correct domain wall dynamics in (N+1)-dimensional Friedmann-Robertson-Walker universes if {alpha}+{beta}/2=N, fully validating its use in numerical studies of cosmic domain evolution. We further show that this result is valid for generic thin featureless domain walls, independently of the Lagrangian of the model.

  13. Mapping luminosity-redshift relationship to Lemaitre-Tolman-Bondi cosmology

    SciTech Connect (OSTI)

    Chung, Daniel J. H.; Romano, Antonio Enea

    2006-11-15

    We derive a direct general map from the luminosity distance D{sub L}(z) to the inhomogeneous matter distribution M(r) in the Lemaitre-Tolman-Bondi (LTB) cosmology and compute several examples. One of our examples explicitly demonstrates that it is possible to tune the LTB cosmological solution to approximately reproduce the luminosity distance curve of a flat Friedmann-Robertson-Walker universe with a cosmological constant. We also discuss how smooth matter distributions can evolve into naked singularities due to shell crossing when the inhomogeneous 'curvature' E(r) is a function which changes sign.

  14. October 13, 2015 Webinar - EPA Radiation Risk Assessment Approach |

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

    Department of Energy 3, 2015 Webinar - EPA Radiation Risk Assessment Approach October 13, 2015 Webinar - EPA Radiation Risk Assessment Approach Performance & RIsk Assessment (P&RA) Community of Practice (CoP) Webinar - October 13, 2015 - EPA Radiation Risk Assessment Approach by Mr. Stuart Walker, U.S. Environmental Protection Agency, 2-3 pm Eastern Time. Agenda - October 13, 2015 - P&RA CoP Webinar (284.55 KB) Presentation - U.S. EPA Superfund Remedial Program's Approach for

  15. Path to Economic Sovereignty: Arctic Opportunities

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

    to Economic Sovereignty: Arctic Opportunities Presented by Kip Knudson Office of Alaska Governor Bill Walker Slide Deck prepared by Sean Skaling, Director, Alaska Energy Authority Photo by Chuck Berray 200 remote microgrids spread over large area  Population: 735,000  Area: 660,000 sq. miles  1.2 people/sq. mile  New Jersey has 1,000 times the density  About 200 stand-alone microgrid communities 3 Alaska Electrical Generation Railbelt 72% of Pop 76% of Energy Natural Gas*

  16. Is Your Home as Ready for Summer as You Are? | Department of Energy

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

    Is Your Home as Ready for Summer as You Are? Is Your Home as Ready for Summer as You Are? June 2, 2014 - 4:09pm Addthis Learn about home energy audits in this Energy 101 video. Harris Walker Communications Specialist, Weatherization and Intergovernmental Program What does this mean for me? You can save money this summer by checking your home for air leaks and seeing if it has sufficient insulation and energy-saving lightbulbs. It took longer than expected, but the harsh winter is finally over

  17. Is a 'Mad Max' apocalypse possible? | GE Global Research

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

    Is Your Home as Ready for Summer as You Are? Is Your Home as Ready for Summer as You Are? June 2, 2014 - 4:09pm Addthis Learn about home energy audits in this Energy 101 video. Harris Walker Communications Specialist, Weatherization and Intergovernmental Program What does this mean for me? You can save money this summer by checking your home for air leaks and seeing if it has sufficient insulation and energy-saving lightbulbs. It took longer than expected, but the harsh winter is finally over

  18. L1:PAC.P6.04 Westinghouse Test Stand Technical Readiness Review

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

    L1:PAC.P6.04 Westinghouse Test Stand Technical Readiness Review Andrew Godfrey ORNL Completed: June 25, 2013 CASL-8-2013-01 -000 D Consortium for Advanced Simulation of LWRs Consortium for Advanced Simulation of Light Water Reactors Bldg. 5700, Room E309, MS 6003 P.O. Box 2008 Oak Ridge, TN 37831-6003 Email: casl-info@ornl.gov Date: 6/25/2013 To: Jess Gehin c: Erik Walker, Mark Baird, From: Andrew Godfrey Subject: Westinghouse Test Stand Technical Readiness Review Jess, I have completed a

  19. Hierarchical Diagnosis T. P. Barnett, N. Schneider, M. Tyree, and J. Ritchie

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

    T. P. Barnett, N. Schneider, M. Tyree, and J. Ritchie Scripps Institute of Oceanography La Jolla, CA 92093-0224 V. Ramanathan, S. Sherwood, G. Zhang, and M. Flatau California Space Institute La Jolla, CA 92093-0221 ; balanced by (local) convective-radiative adjustments. Rather, the entire Walker and Hadley cells are altered by the cloud changes. The balances are thus affected by dynamic processes, which emphasizes the need to place warm pool ARM measurement into the context of a good AGCM (or

  20. TRU TeamWorks

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

    4, 2013 WIPP Quick Facts (As of 1-23-13) 11,112 Shipments received since opening (10,483 CH and 629 RH) 85,498 Cubic meters of waste disposed (85,185 CH and 313 RH) 165,172 Containers disposed in the underground (164,545 CH and 627 RH) WIPP employee honored by American Red Cross WIPP's Bob Walker was among a handful of honorees at the American Red Cross' Southeastern New Mexico Real Heroes Breakfast & Awards held January 10 in Hobbs. The organization awarded Real Heroes in various

  1. Interacting dark sector with transversal interaction

    SciTech Connect (OSTI)

    Chimento, Luis P.; Richarte, Martín G.

    2015-03-26

    We investigate the interacting dark sector composed of dark matter, dark energy, and dark radiation for a spatially flat Friedmann-Robertson-Walker (FRW) background by introducing a three-dimensional internal space spanned by the interaction vector Q and solve the source equation for a linear transversal interaction. Then, we explore a realistic model with dark matter coupled to a scalar field plus a decoupled radiation term, analyze the amount of dark energy in the radiation era and find that our model is consistent with the recent measurements of cosmic microwave background anisotropy coming from Planck along with the future constraints achievable by CMBPol experiment.

  2. Three-Dimensional Geologic Characterization of Geothermal Systems: Astor Pass, Nevada, USA

    SciTech Connect (OSTI)

    Siler, Drew L; Mayhew, Brett; Faulds, James E

    2012-09-30

    Geothermal systems in the Great Basin, USA, are controlled by a variety of fault intersection and fault interaction areas. Understanding the specific geometry of the structures most conducive to geothermal circulation is crucial in order to both mitigate the costs of geothermal exploration (especially drilling) and to identify blind geothermal systems (no surface expression). Astor Pass, Nevada, one such blind geothermal system, lies near the boundary between two distinct structural domains, the Walker Lane and the Basin and Range, and exhibits characteristics of each setting. Both northwest-striking, left-stepping dextral faults of the Walker Lane and kinematically linked northerly striking normal faults associated with the Basin and Range are present at Astor Pass. Previous studies identified a blind geothermal system controlled by the intersection of northwest-striking dextral and north-northwest-striking normal faults. Wells drilled into the southwestern quadrant of the fault intersection yielded 94˚C fluids, with geothermometers suggesting significantly higher maximum temperatures. Additional data, including reprocessed 2D seismic data and petrologic analysis of well cuttings, were integrated with existing and reinterpreted geologic maps and cross-sections to aid construction of a 3D geologic model. This comprehensive 3D integration of multiple data sets allows characterization of the structural setting of the Astor Pass blind geothermal system at a level of detail beyond what independent data interpretation can provide. Our analysis indicates that the blind geothermal system is controlled by two north- to northwest-plunging fault intersections.

  3. Temporal variation in the importance of a dominant consumer to stream nutrient cycling

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

    Griffiths, Natalie A.; Hill, Walter

    2014-01-01

    Animal excretion can be a significant nutrient flux within ecosystems, where it supports primary production and facilitates microbial decomposition of organic matter. The effects of excretory products on nutrient cycling have been documented for various species and ecosystems, but temporal variation in these processes is poorly understood. We examined variation in excretion rates of a dominant grazing snail, Elimia clavaeformis, and its contribution to nutrient cycling, over the course of 14 months in a well-studied, low-nutrient stream (Walker Branch, east Tennessee, USA). Biomass-specific excretion rates of ammonium varied over twofold during the study, coinciding with seasonal changes in food availabilitymore » (measured as gross primary production) and water temperature (multiple linear regression, R2 = 0.57, P = 0.053). The contribution of ammonium excretion to nutrient cycling varied with seasonal changes in both biological (that is, nutrient uptake rate) and physical (that is, stream flow) variables. On average, ammonium excretion accounted for 58% of stream water ammonium concentrations, 26% of whole-stream nitrogen demand, and 66% of autotrophic nitrogen uptake. Phosphorus excretion by Elimia was contrastingly low throughout the year, supplying only 1% of total dissolved phosphorus concentrations. The high average N:P ratio (89:1) of snail excretion likely exacerbated phosphorus limitation in Walker Branch. To fully characterize animal excretion rates and effects on ecosystem processes, multiple measurements through time are necessary, especially in ecosystems that experience strong seasonality.« less

  4. Temporal variation in the importance of a dominant consumer to stream nutrient cycling

    SciTech Connect (OSTI)

    Griffiths, Natalie A.; Hill, Walter

    2014-01-01

    Animal excretion can be a significant nutrient flux within ecosystems, where it supports primary production and facilitates microbial decomposition of organic matter. The effects of excretory products on nutrient cycling have been documented for various species and ecosystems, but temporal variation in these processes is poorly understood. We examined variation in excretion rates of a dominant grazing snail, Elimia clavaeformis, and its contribution to nutrient cycling, over the course of 14 months in a well-studied, low-nutrient stream (Walker Branch, east Tennessee, USA). Biomass-specific excretion rates of ammonium varied over twofold during the study, coinciding with seasonal changes in food availability (measured as gross primary production) and water temperature (multiple linear regression, R2 = 0.57, P = 0.053). The contribution of ammonium excretion to nutrient cycling varied with seasonal changes in both biological (that is, nutrient uptake rate) and physical (that is, stream flow) variables. On average, ammonium excretion accounted for 58% of stream water ammonium concentrations, 26% of whole-stream nitrogen demand, and 66% of autotrophic nitrogen uptake. Phosphorus excretion by Elimia was contrastingly low throughout the year, supplying only 1% of total dissolved phosphorus concentrations. The high average N:P ratio (89:1) of snail excretion likely exacerbated phosphorus limitation in Walker Branch. To fully characterize animal excretion rates and effects on ecosystem processes, multiple measurements through time are necessary, especially in ecosystems that experience strong seasonality.

  5. Scientific Objectives of the Gulf of Mexico Gas Hydrate JIP Leg II Drilling

    SciTech Connect (OSTI)

    Jones, E.; Latham, T.; McConnell, D.; Frye, M.; Hunt, J.; Shedd, W.; Shelander, D.; Boswell, R.M.; Rose, K.K.; Ruppel, C.; Hutchinson, D.; Collett, T.; Dugan, B.; Wood, W.

    2008-05-01

    The Gulf of Mexico Methane Hydrate Joint Industry Project (JIP) has been performing research on marine gas hydrates since 2001 and is sponsored by both the JIP members and the U.S. Department of Energy. In 2005, the JIP drilled the Atwater Valley and Keathley Canyon exploration blocks in the Gulf of Mexico to acquire downhole logs and recover cores in silt- and clay-dominated sediments interpreted to contain gas hydrate based on analysis of existing 3-D seismic data prior to drilling. The new 2007-2009 phase of logging and coring, which is described in this paper, will concentrate on gas hydrate-bearing sands in the Alaminos Canyon, Green Canyon, and Walker Ridge protraction areas. Locations were selected to target higher permeability, coarser-grained lithologies (e.g., sands) that have the potential for hosting high saturations of gas hydrate and to assist the U.S. Minerals Management Service with its assessment of gas hydrate resources in the Gulf of Mexico. This paper discusses the scientific objectives for drilling during the upcoming campaign and presents the results from analyzing existing seismic and well log data as part of the site selection process. Alaminos Canyon 818 has the most complete data set of the selected blocks, with both seismic data and comprehensive downhole log data consistent with the occurrence of gas hydrate-bearing sands. Preliminary analyses suggest that the Frio sandstone just above the base of the gas hydrate stability zone may have up to 80% of the available sediment pore space occupied by gas hydrate. The proposed sites in the Green Canyon and Walker Ridge areas are also interpreted to have gas hydrate-bearing sands near the base of the gas hydrate stability zone, but the choice of specific drill sites is not yet complete. The Green Canyon site coincides with a 4-way closure within a Pleistocene sand unit in an area of strong gas flux just south of the Sigsbee Escarpment. The Walker Ridge site is characterized by a sand

  6. On finite density effects on cosmic reheating and moduli decay and implications for Dark Matter production

    SciTech Connect (OSTI)

    Drewes, Marco

    2014-11-01

    We study the damping of an oscillating scalar field in a Friedmann-Robertson-Walker spacetime by perturbative processes, taking into account the back-reaction of the plasma of decay products on the damping rate. The scalar field may be identified with the inflaton, in which case this process resembles the reheating of the universe after inflation. It can also model a modulus that dominates the energy density of the universe at later times. We find that the finite density corrections to the damping rate can have a drastic effect on the thermal history and considerably increase both, the maximal temperature in the early universe and the reheating temperature at the onset of the radiation dominated era. As a result the abundance of some Dark Matter candidates may be considerably larger than previously estimated. We give improved analytic estimates for the maximal and the reheating temperatures and confirm them numerically in a simple model.

  7. U.S. Energy Information Administration | Annual Coal Report 2014

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

    2. Coal Production and Number of Mines by State, County, and Mine Type, 2014 (thousand short tons) Underground Surface Total Coal-Producing State and County Number of Mines Production Number of Mines Production Number of Mines Production Alabama 7 12,516 29 3,847 36 16,363 Bibb - - 1 72 1 72 Franklin - - 2 141 2 141 Jefferson 3 4,315 7 1,154 10 5,469 Shelby 1 165 2 122 3 286 Tuscaloosa 2 7,947 4 366 6 8,313 Walker 1 90 11 1,559 12 1,650 Winston - - 2 432 2 432 Alaska - - 1 1,502 1 1,502 Denali -

  8. U.S. Energy Information Administration | Annual Coal Report 2014

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

    0. Average Sales Price of Coal by State, County, and Number of Mines, 2014 Coal-Producing State and County Number of Mines Sales (thousand short tons) Average Sales Price (dollars per short ton) Alabama 32 17,359 87.17 Bibb 1 w w Franklin 2 w w Jefferson 9 5,764 103.31 Shelby 2 w w Tuscaloosa 6 8,693 79.37 Walker 10 1,886 79.19 Winston 2 w w Alaska 1 w w Denali 1 w w Arizona 1 w w Navajo 1 w w Arkansas 1 w w Sebastian 1 w w Colorado 9 24,536 38.64 Delta 1 w w Gunnison 1 w w La Plata 1 w w Moffat

  9. The Weyl tensor correlator in cosmological spacetimes

    SciTech Connect (OSTI)

    Fröb, Markus B.

    2014-12-05

    We give a general expression for the Weyl tensor two-point function in a general Friedmann-Lemaître-Robertson-Walker spacetime. We work in reduced phase space for the perturbations, i.e., quantize only the dynamical degrees of freedom without adding any gauge-fixing term. The general formula is illustrated by a calculation in slow-roll single-field inflation to first order in the slow-roll parameters ϵ and δ, and the result is shown to have the correct de Sitter limit as ϵ,δ→0. Furthermore, it is seen that the Weyl tensor correlation function in slow-roll does not suffer from infrared divergences, unlike the two-point functions of the metric and scalar field perturbations. Lastly, we show how to recover the usual tensor power spectrum from the Weyl tensor correlation function.

  10. Modeling and Experimental Investigation of Methylcyclohexane Ignition in a Rapid Compression Machine

    SciTech Connect (OSTI)

    Pitz, W J; Naik, C V; Mhaold?in, T N; Curran, H J; Orme, J P; Simmie, J M; Westbrook, C K

    2005-10-13

    A new mechanism for the oxidation of methylcyclohexane has been developed. The mechanism combined a newly-developed low temperature mechanism with a previously developed high temperature mechanism. Predictions from the chemical kinetic model have been compared to experimentally measured ignition delay times from a rapid compression machine. Predicted ignition delay times using the initial estimates of the methylcyclohexyl peroxy radical isomerization rate constants were much longer than those measured at low temperatures. The initial estimates of isomerization rate constants were modified based on the experimental findings of Gulati and Walker that indicate a much slower rate of isomerization. Predictions using the modified rate constants for isomerizations yielded faster ignition at lower temperatures that greatly improved the agreement between model predictions and the experimental data. These findings point to much slower isomerization rates for methylcyclohexyl peroxy radicals than previously expected.

  11. The Raychaudhuri equation in homogeneous cosmologies

    SciTech Connect (OSTI)

    Albareti, F.D.; Cembranos, J.A.R.; Cruz-Dombriz, A. de la; Dobado, A. E-mail: cembra@fis.ucm.es E-mail: dobado@fis.ucm.es

    2014-03-01

    In this work we address the issue of studying the conditions required to guarantee the Focusing Theorem for both null and timelike geodesic congruences by using the Raychaudhuri equation. In particular we study the case of Friedmann-Robertson-Walker as well as more general Bianchi Type I spacetimes. The fulfillment of the Focusing Theorem is mandatory in small scales since it accounts for the attractive character of gravity. However, the Focusing Theorem is not satisfied at cosmological scales due to the measured negative deceleration parameter. The study of the conditions needed for congruences convergence is not only relevant at the fundamental level but also to derive the viability conditions to be imposed on extended theories of gravity describing the different expansion regimes of the universe. We illustrate this idea for f(R) gravity theories.

  12. Proxy Records of the Indonesian Low and the El Ni{tilde n}o-Southern Oscillation (ENSO) from Stable Isotope Measurements of Indonesian Reef Corals

    SciTech Connect (OSTI)

    Moore, M.D.

    1995-12-31

    The Earth`s largest atmospheric convective center is the Indonesian Low. It generates the Australasian monsoon, drives the zonal tropospheric Walker Circulation, and is implicated in the genesis of the El Nino-Southern Oscillation (ENSO). The long-term variability of the Indonesian Low is poorly characterized, yet such information is crucial for evaluating whether changes in the strength and frequency of ENSO events are a possible manifestation of global warming. Stable oxygen isotope ratios ({delta}{sup 18}O) in shallow-water reef coral skeletons track topical convective activity over hundreds of years because the input of isotopically-depleted rainwater dilutes seawater {delta}{sup 18}O. Corals also impose a temperature-dependent fractionation on {delta}{sup 18}O, but where annual rainfall is high and sea surface temperature (SST) variability is low the freshwater flux effect dominates.

  13. Steady-state domain wall motion driven by adiabatic spin-transfer torque with assistance of microwave field

    SciTech Connect (OSTI)

    Wang, Xi-guang; Guo, Guang-hua Nie, Yao-zhuang; Xia, Qing-lin; Tang, Wei; Wang, D.; Zeng, Zhong-ming

    2013-12-23

    We have studied the current-induced displacement of a 180° Bloch wall by means of micromagnetic simulation and analytical approach. It is found that the adiabatic spin-transfer torque can sustain a steady-state domain wall (DW) motion in the direction opposite to that of the electron flow without Walker Breakdown when a transverse microwave field is applied. This kind of motion is very sensitive to the microwave frequency and can be resonantly enhanced by exciting the domain wall thickness oscillation mode. A one-dimensional analytical model was established to account for the microwave-assisted wall motion. These findings may be helpful for reducing the critical spin-polarized current density and designing DW-based spintronic devices.

  14. Scaling Behavior of the First Arrival Time of a Random-Walking Magnetic Domain

    SciTech Connect (OSTI)

    Im, M.-Y.; Lee, S.-H.; Kim, D.-H.; Fischer, P.; Shin, S.-C.

    2008-02-04

    We report a universal scaling behavior of the first arrival time of a traveling magnetic domain wall into a finite space-time observation window of a magneto-optical microscope enabling direct visualization of a Barkhausen avalanche in real time. The first arrival time of the traveling magnetic domain wall exhibits a nontrivial fluctuation and its statistical distribution is described by universal power-law scaling with scaling exponents of 1.34 {+-} 0.07 for CoCr and CoCrPt films, despite their quite different domain evolution patterns. Numerical simulation of the first arrival time with an assumption that the magnetic domain wall traveled as a random walker well matches our experimentally observed scaling behavior, providing an experimental support for the random-walking model of traveling magnetic domain walls.

  15. Ghost dark matter

    SciTech Connect (OSTI)

    Furukawa, Tomonori; Yokoyama, Shuichiro; Ichiki, Kiyotomo; Sugiyama, Naoshi; Mukohyama, Shinji E-mail: shu@a.phys.nagoya-u.ac.jp E-mail: naoshi@a.phys.nagoya-u.ac.jp

    2010-05-01

    We revisit ghost dark matter, the possibility that ghost condensation may serve as an alternative to dark matter. In particular, we investigate the Friedmann-Robertson-Walker (FRW) background evolution and the large-scale structure (LSS) in the ΛGDM universe, i.e. a late-time universe dominated by a cosmological constant and ghost dark matter. The FRW background of the ΛGDM universe is indistinguishable from that of the standard ΛCDM universe if M∼>1eV, where M is the scale of spontaneous Lorentz breaking. From the LSS we find a stronger bound: M∼>10eV. For smaller M, ghost dark matter would have non-negligible sound speed after the matter-radiation equality, and thus the matter power spectrum would significantly differ from observation. These bounds are compatible with the phenomenological upper bound M∼<100GeV known in the literature.

  16. Does the mass of a black hole decrease due to the accretion of phantom energy?

    SciTech Connect (OSTI)

    Gao Changjun; Chen Xuelei; Faraoni, Valerio; Shen Yougen

    2008-07-15

    According to Babichev et al., the accretion of a phantom test fluid onto a Schwarzschild black hole will induce the mass of the black hole to decrease, however the backreaction was ignored in their calculation. Using new exact solutions describing black holes in a background Friedmann-Robertson-Walker universe, we find that the physical black hole mass may instead increase due to the accretion of phantom energy. If this is the case, and the future universe is dominated by phantom dark energy, the black hole apparent horizon and the cosmic apparent horizon will eventually coincide and, after that, the black hole singularity will become naked in finite comoving time before the big rip occurs, violating the cosmic censorship conjecture.

  17. Current-driven domain wall motion enhanced by the microwave field

    SciTech Connect (OSTI)

    Wang, Xi-guang; Guo, Guang-hua Nie, Yao-zhuang; Wang, Dao-wei; Li, Zhi-xiong; Tang, Wei; Zeng, Zhong-ming

    2014-07-14

    The magnetic domain wall (DW) motion driven by a spin-polarized current opens a new concept for memory and logic devices. However, the critical current density required to overcome the intrinsic and/or extrinsic pinning of DW remains too large for practical applications. Here, we show, by using micromagnetic simulations and analytical approaches, that the application of a microwave field offers an effective solution to this problem. When a transverse microwave field is applied, the adiabatic spin-transfer torque (STT) alone can sustain a steady-state DW motion without the sign of Walker breakdown, meaning that the intrinsic pinning disappears. The extrinsic pinning can also be effectively reduced. Moreover, the DW velocity is increased greatly for the microwave-assisted DW motion. This provides a new way to manipulate the DW motion at low current densities.

  18. Exposure-rate calibration using large-area calibration pads

    SciTech Connect (OSTI)

    Novak, E.F.

    1988-09-01

    The US Department of Energy (DOE) Office of Remedial Action and Waste Technology established the Technical Measurements Center (TMC) at the DOE Grand Junction Projects Office (GJPO) in Grand Junction, Colorado, to standardize, calibrate, and compare measurements made in support of DOE remedial action programs. A set of large-area, radioelement-enriched concrete pads was constructed by the DOE in 1978 at the Walker Field Airport in Grand Junction for use as calibration standards for airborne gamma-ray spectrometer systems. The use of these pads was investigated by the TMC as potential calibration standards for portable scintillometers employed in measuring gamma-ray exposure rates at Uranium Mill Tailings Remedial Action (UMTRA) project sites. Data acquired on the pads using a pressurized ionization chamber (PIC) and three scintillometers are presented as an illustration of an instrumental calibration. Conclusions and recommended calibration procedures are discussed, based on the results of these data.

  19. Fiscal Year 1987 DOE budget authorization: environmental research and development. Hearing before the Subcommittee on Natural Resources, Agriculture Research and Environment of the Committee on Science and Technology, House of Representatives, Ninety-Ninth Congress, Second Session, March 6, 1986, No. 141

    SciTech Connect (OSTI)

    Not Available

    1986-01-01

    Dr. Alvin Trivelpiece, Director of the DOE Energy Research, Mary L. Walker of DOE, and Dr. James Kane of the University of California testified on the administration's request of $273.8 million for DOE environmental programs. Partly because of Dr. Kane's criticisms of the 1976 budget, much of the $45.2 million increase over the 1986 request would go for new safety and health initiatives, with the remainder going for biological and environmental research. Kane was particularly critical of measures to protect the health and safety of DOE workers. DOE also acknowledges the global nature of biological and environmental research program. An appendix with additional communications and statements submitted for the record follow the testimony of the three witnesses.

  20. The fixed hypernode method for the solution of the many body Schroedinger equation

    SciTech Connect (OSTI)

    Pederiva, F; Kalos, M H; Reboredo, F; Bressanini, D; Guclu, D; Colletti, L; Umrigar, C J

    2006-01-24

    We propose a new scheme for an approximate solution of the Schroedinger equation for a many-body interacting system, based on the use of pairs of walkers. Trial wavefunctions for these pairs are combinations of standard symmetric and antisymmetric wavefunctions. The method consists in applying a fixed-node restriction in the enlarged space, and computing the energy of the antisymmetric state from the knowledge of the exact ground state energy for the symmetric state. We made two conjectures: first, that this fixed-hypernode energy is an upper bound to the true fermion energy; second that this bound would necessarily be lower than the usual fixed-node energy using the same antisymmetric trial function. The first conjecture is true, and is proved in this paper. The second is not, and numerical and analytical counterexamples are given. The question of whether the fixed-hypernode energy can be better than the usual bound remains open.

  1. The Weyl tensor correlator in cosmological spacetimes

    SciTech Connect (OSTI)

    Frb, Markus B.

    2014-12-01

    We give a general expression for the Weyl tensor two-point function in a general Friedmann-Lematre-Robertson-Walker spacetime. We work in reduced phase space for the perturbations, i.e., quantize only the dynamical degrees of freedom without adding any gauge-fixing term. The general formula is illustrated by a calculation in slow-roll single-field inflation to first order in the slow-roll parameters ? and ?, and the result is shown to have the correct de Sitter limit as ?,??0. Furthermore, it is seen that the Weyl tensor correlation function in slow-roll does not suffer from infrared divergences, unlike the two-point functions of the metric and scalar field perturbations. Lastly, we show how to recover the usual tensor power spectrum from the Weyl tensor correlation function.

  2. Inflationary perturbations in anisotropic, shear-free universes

    SciTech Connect (OSTI)

    Pereira, Thiago S.; Carneiro, Saulo; Marugan, Guillermo A. Mena E-mail: saulo.carneiro@pq.cnpq.br

    2012-05-01

    In this work, the linear and gauge-invariant theory of cosmological perturbations in a class of anisotropic and shear-free spacetimes is developed. After constructing an explicit set of complete eigenfunctions in terms of which perturbations can be expanded, we identify the effective degrees of freedom during a generic slow-roll inflationary phase. These correspond to the anisotropic equivalent of the standard Mukhanov-Sasaki variables. The associated equations of motion present a remarkable resemblance to those found in perturbed Friedmann-Robertson-Walker spacetimes with curvature, apart from the spectrum of the Laplacian, which exhibits the characteristic frequencies of the underlying geometry. In particular, it is found that the perturbations cannot develop arbitrarily large super-Hubble modes.

  3. Non-adiabatic perturbations in decaying vacuum cosmology

    SciTech Connect (OSTI)

    Zimdahl, W.; Fabris, J.C.; Borges, H.A.; Carneiro, S.; Hiplito-Ricaldi, W.S. E-mail: humberto@ufba.br E-mail: fabris@pq.cnpq.br

    2011-04-01

    We investigate a spatially flat Friedmann-Lematre-Robertson-Walker cosmology in which a decaying vacuum term causes matter production at late times. Assuming a decay proportional to the Hubble rate, the ratio of the background energy densities of dark matter and dark energy changes with the cosmic scale factor as a{sup ?3/2}. The intrinsically non-adiabatic two-component perturbation dynamics of this model is reduced to a single second-order equation. Perturbations of the vacuum term are shown to be negligible on scales that are relevant for structure formation. On larger scales, dark-energy perturbations give a somewhat higher contribution but remain always smaller than the dark-matter perturbations.

  4. Relationships between walking and percentiles of adiposity inolder and younger men

    SciTech Connect (OSTI)

    Williams, Paul T.

    2005-06-01

    To assess the relationship of weekly walking distance to percentiles of adiposity in elders (age {ge} 75 years), seniors (55 {le} age <75 years), middle-age men (35 {le} age <55 years), and younger men (18 {le} age <35 years old). Cross-sectional analyses of baseline questionnaires from 7,082 male participants of the National Walkers Health Study. The walkers BMIs were inversely and significantly associated with walking distance (kg/m{sup 2} per km/wk) in elders (slope {+-} SE: -0.032 {+-} 0.008), seniors (-0.045 {+-} 0.005), and middle-aged men (-0.037 {+-} 0.007), as were their waist circumferences (-0.091 {+-} 0.025, -0.045 {+-} 0.005, and -0.091 {+-} 0.015 cm per km/wk, respectively), and these slopes remained significant when adjusted statistically for reported weekly servings of meat, fish, fruit, and alcohol. The declines in BMI associated with walking distance were greater at the higher than lower percentiles of the BMI distribution. Specifically, compared to the decline at the 10th BMI percentile, the decline in BMI at the 90th percentile was 5.1-fold greater in elders, 5.9-fold greater in seniors, and 6.7-fold greater in middle-age men. The declines in waist circumference associated with walking distance were also greater among men with broader waistlines. Exercise-induced weight loss (or self-selection) causes an inverse relationship between adiposity and walking distance in men 35 and older that is substantially greater among fatter men.

  5. Silver Peak Innovative Exploration Project (Ram Power Inc.)

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

    Miller, Clay

    2010-01-01

    Data generated from the Silver Peak Innovative Exploration Project, in Esmeralda County, Nevada, encompasses a deep-circulation (amagmatic) meteoric-geothermal system circulating beneath basin-fill sediments locally blanketed with travertine in western Clayton Valley (lithium-rich brines from which have been mined for several decades). Spring- and shallow-borehole thermal-water geochemistry and geothermometry suggest that a Silver Peak geothermal reservoir is very likely to attain the temperature range 260- 300oF (~125-150oC), and may reach 300-340oF (~150-170oC) or higher (GeothermEx, Inc., 2006). Results of detailed geologic mapping, structural analysis, and conceptual modeling of the prospect (1) support the GeothermEx (op. cit.) assertion that the Silver Peak prospect has good potential for geothermal-power production; and (2) provide a theoretical geologic framework for further exploration and development of the resource. The Silver Peak prospect is situated in the transtensional (regional shearing coupled with extension) Walker Lane structural belt, and squarely within the late Miocene to Pliocene (11 Ma to ~5 Ma) Silver Peak-Lone Mountain metamorphic core complex (SPCC), a feature that accommodated initial displacement transfer between major right-lateral strike- slip fault zones on opposite sides of the Walker Lane. The SPCC consists essentially of a ductiley-deformed lower plate, or core, of Proterozoic metamorphic tectonites and tectonized Mesozoic granitoids separated by a regionally extensive, low-angle detachment fault from an upper plate of severely stretched and fractured structural slices of brittle, Proterozoic to Miocene-age lithologies. From a geothermal perspective, the detachment fault itself and some of the upper-plate structural sheets could function as important, if secondary, subhorizontal thermal-fluid aquifers in a Silver Peak hydrothermal system.

  6. Permeability and porosity of hydrate-bearing sediments in the northern Gulf of Mexico

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

    Daigle, Hugh; Cook, Ann; Malinverno, Alberto

    2015-10-14

    Hydrate-bearing sands are being actively explored because they contain the highest concentrations of hydrate and are the most economically recoverable hydrate resource. However, relatively little is known about the mechanisms or timescales of hydrate formation, which are related to methane supply, fluid flux, and host sediment properties such as permeability. We used logging-while-drilling data from locations in the northern Gulf of Mexico to develop an effective medium theory-based model for predicting permeability based on clay-sized sediment fraction. The model considers permeability varying between sand and clay endpoint permeabilities that are defined from laboratory data. We verified the model using permeabilitymore » measurements on core samples from three boreholes, and then used the model to predict permeability in two wells drilled in Walker Ridge Block 313 during the Gulf of Mexico Gas Hydrate Joint Industry Project Leg II expedition in 2009. We found that the cleanest sands (clay-sized fraction <0.05) had intrinsic (hydrate-free) permeability contrasts of 5-6 orders of magnitude with the surrounding clays, which is sufficient to provide focused hydrate formation due to advection of methane from a deep source or diffusion of microbial methane from nearby clay layers. In sands where the clay-sized fraction exceeds 0.05, the permeability reduces significantly and focused flow is less pronounced. In these cases, diffusion of dissolved microbial methane is most likely the preferred mode of methane supply for hydrate formation. In conclusion, our results provide important constraints on methane supply mechanisms in the Walker Ridge area and have global implications for evaluating rates of methane migration and hydrate formation in hydrate-bearing sands.« less

  7. Permeability and porosity of hydrate-bearing sediments in the northern Gulf of Mexico

    SciTech Connect (OSTI)

    Daigle, Hugh; Cook, Ann; Malinverno, Alberto

    2015-10-14

    Hydrate-bearing sands are being actively explored because they contain the highest concentrations of hydrate and are the most economically recoverable hydrate resource. However, relatively little is known about the mechanisms or timescales of hydrate formation, which are related to methane supply, fluid flux, and host sediment properties such as permeability. We used logging-while-drilling data from locations in the northern Gulf of Mexico to develop an effective medium theory-based model for predicting permeability based on clay-sized sediment fraction. The model considers permeability varying between sand and clay endpoint permeabilities that are defined from laboratory data. We verified the model using permeability measurements on core samples from three boreholes, and then used the model to predict permeability in two wells drilled in Walker Ridge Block 313 during the Gulf of Mexico Gas Hydrate Joint Industry Project Leg II expedition in 2009. We found that the cleanest sands (clay-sized fraction <0.05) had intrinsic (hydrate-free) permeability contrasts of 5-6 orders of magnitude with the surrounding clays, which is sufficient to provide focused hydrate formation due to advection of methane from a deep source or diffusion of microbial methane from nearby clay layers. In sands where the clay-sized fraction exceeds 0.05, the permeability reduces significantly and focused flow is less pronounced. In these cases, diffusion of dissolved microbial methane is most likely the preferred mode of methane supply for hydrate formation. In conclusion, our results provide important constraints on methane supply mechanisms in the Walker Ridge area and have global implications for evaluating rates of methane migration and hydrate formation in hydrate-bearing sands.

  8. Silver Peak Innovative Exploration Project (Ram Power Inc.)

    SciTech Connect (OSTI)

    Miller, Clay

    2010-01-01

    Data generated from the Silver Peak Innovative Exploration Project, in Esmeralda County, Nevada, encompasses a “deep-circulation (amagmatic)” meteoric-geothermal system circulating beneath basin-fill sediments locally blanketed with travertine in western Clayton Valley (lithium-rich brines from which have been mined for several decades). Spring- and shallow-borehole thermal-water geochemistry and geothermometry suggest that a Silver Peak geothermal reservoir is very likely to attain the temperature range 260- 300oF (~125-150oC), and may reach 300-340oF (~150-170oC) or higher (GeothermEx, Inc., 2006). Results of detailed geologic mapping, structural analysis, and conceptual modeling of the prospect (1) support the GeothermEx (op. cit.) assertion that the Silver Peak prospect has good potential for geothermal-power production; and (2) provide a theoretical geologic framework for further exploration and development of the resource. The Silver Peak prospect is situated in the transtensional (regional shearing coupled with extension) Walker Lane structural belt, and squarely within the late Miocene to Pliocene (11 Ma to ~5 Ma) Silver Peak-Lone Mountain metamorphic core complex (SPCC), a feature that accommodated initial displacement transfer between major right-lateral strike- slip fault zones on opposite sides of the Walker Lane. The SPCC consists essentially of a ductiley-deformed lower plate, or “core,” of Proterozoic metamorphic tectonites and tectonized Mesozoic granitoids separated by a regionally extensive, low-angle detachment fault from an upper plate of severely stretched and fractured structural slices of brittle, Proterozoic to Miocene-age lithologies. From a geothermal perspective, the detachment fault itself and some of the upper-plate structural sheets could function as important, if secondary, subhorizontal thermal-fluid aquifers in a Silver Peak hydrothermal system.

  9. Long-term successional forest dynamics: species and community responses to climatic variability

    SciTech Connect (OSTI)

    Kardol, Paul; Todd Jr, Donald E; Hanson, Paul J; Mulholland, Patrick J

    2010-01-01

    Question: Are tree dynamics sensitive to climatic variability, and do tree species differ in their responses to climatic variability? Hence, is vulnerability of forest communities to climatic variability depending on stand composition? Location: Mixed young forest at Walker Branch Watershed near Oak Ridge, East-Tennessee, USA. Methods: Using a long-term data set (1967-2006), we analyzed temporal forest dynamics at the tree and species level, and we analyzed community dynamics for forest stands that different in their initial species composition (i.e., Chestnut Oak, Oak-Hickory, Pine, and Yellow poplar stands). Using summer drought and growing season temperature as defined climate drivers, we evaluated relationships between forest dynamics and climate across levels of organization. Results: Over the 4-decade studied period, forest communities underwent successional change and substantially increased their biomass. Variation in summer drought and growing season temperature contributed to temporal biomass dynamics for some tree species, but not for others. Stand-level responses to climatic variability were shown to be related to responses of specific component species; however, not for Pine stands. Pinus echinata, the dominant species in stands initially identified as Pine stands, decreased over time due to periodical outbreaks of the pine bark beetle (Dendroctonus frontalis). The outbreaks on Walker Branch could not be directly related to climatic conditions. Conclusions: Our results imply that vulnerability of developing forests to predicted climate conditions is stand-type dependent, and hence, is a function of species composition. Autogenic successional processes (or insect outbreaks) were found to prevail over climatic variability in determining long-term forest dynamics for stands dominated by sensitive species, emphasizing the importance of studying interactions between forest succession and climate change.

  10. Silver Peak Innovative Exploration Project (Ram Power Inc.)

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

    Miller, Clay

    Data generated from the Silver Peak Innovative Exploration Project, in Esmeralda County, Nevada, encompasses a deep-circulation (amagmatic) meteoric-geothermal system circulating beneath basin-fill sediments locally blanketed with travertine in western Clayton Valley (lithium-rich brines from which have been mined for several decades). Spring- and shallow-borehole thermal-water geochemistry and geothermometry suggest that a Silver Peak geothermal reservoir is very likely to attain the temperature range 260- 300oF (~125-150oC), and may reach 300-340oF (~150-170oC) or higher (GeothermEx, Inc., 2006). Results of detailed geologic mapping, structural analysis, and conceptual modeling of the prospect (1) support the GeothermEx (op. cit.) assertion that the Silver Peak prospect has good potential for geothermal-power production; and (2) provide a theoretical geologic framework for further exploration and development of the resource. The Silver Peak prospect is situated in the transtensional (regional shearing coupled with extension) Walker Lane structural belt, and squarely within the late Miocene to Pliocene (11 Ma to ~5 Ma) Silver Peak-Lone Mountain metamorphic core complex (SPCC), a feature that accommodated initial displacement transfer between major right-lateral strike- slip fault zones on opposite sides of the Walker Lane. The SPCC consists essentially of a ductiley-deformed lower plate, or core, of Proterozoic metamorphic tectonites and tectonized Mesozoic granitoids separated by a regionally extensive, low-angle detachment fault from an upper plate of severely stretched and fractured structural slices of brittle, Proterozoic to Miocene-age lithologies. From a geothermal perspective, the detachment fault itself and some of the upper-plate structural sheets could function as important, if secondary, subhorizontal thermal-fluid aquifers in a Silver Peak hydrothermal system.

  11. Aerial photographic interpretation of lineaments and faults in late cenozoic deposits in the Eastern part of the Benton Range 1:100,000 quadrangle and the Goldfield, Last Chance Range, Beatty, and Death Valley Junction 1:100,000 quadrangles, Nevada and California

    SciTech Connect (OSTI)

    Reheis, M.C.; Noller, J.S.

    1991-09-01

    Lineaments and faults in Quaternary and late Tertiary deposits in the southern part of the Walker Lane are potentially active and form patterns that are anomalous with respect to the typical fault patterns in most of the Great Basin. Little work has been done to identify and characterize these faults, with the exception of those in the Death Valley-Furnace Creek (DVFCFZ) fault system and those in and near the Nevada Test Site. Four maps at a scale of 1:100,000 summarize the existing knowledge about these lineaments and faults based on extensive aerial-photo interpretation, limited field investigations, and published geologic maps. The lineaments and faults in all four maps can be divided geographically into two groups. The first group includes west- to north-trending lineaments and faults associated with the DVFCFZ and with the Pahrump fault zone in the Death Valley Junction quadrangle. The second group consists of north- to east-northeast-trending lineaments and faults in a broad area that lies east of the DVFCFZ and north of the Pahrump fault zone. Preliminary observations of the orientations and sense of slip of the lineaments and faults suggest that the least principle stress direction is west-east in the area of the first group and northwest-southeast in the area of the second group. The DVFCFZ appears to be part of a regional right-lateral strike-slip system. The DVFCFZ steps right, accompanied by normal faulting in an extensional zone, to the northern part of the Walker Lane a the northern end of Fish Lake Valley (Goldfield quadrangle), and appears to step left, accompanied by faulting and folding in a compressional zone, to the Pahrump fault zone in the area of Ash Meadows (Death Valley Junction quadrangle). 25 refs.

  12. Regional Slip Tendency Analysis of the Great Basin Region

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

    Faulds, James E.

    - The resulting along?fault and fault?to?fault variation in slip or dilation potential is a proxy for along fault and fault?to?fault variation in fluid flow conduit potential. Stress Magnitudes and directions were calculated across the entire Great Basin. Stress field variation within each focus area was approximated based on regional published data and the world stress database (Hickman et al., 2000; Hickman et al., 1998 Robertson?Tait et al., 2004; Hickman and Davatzes, 2010; Davatzes and Hickman, 2006; Blake and Davatzes 2011; Blake and Davatzes, 2012; Moeck et al., 2010; Moos and Ronne, 2010 and Reinecker et al., 2005). The minimum horizontal stress direction (Shmin) was contoured, and spatial bins with common Shmin directions were calculated. Based on this technique, we subdivided the Great Basin into nine regions (Shmin <070, 070140). Slip and dilation tendency were calculated using 3DStress for the faults within each region using the mean Shmin for the region. Shmin variation throughout Great Basin are shown on Figure 3. For faults within the Great Basin proper, we applied a normal faulting stress regime, where the vertical stress (sv) is larger than the maximum horizontal stress (shmax), which is larger than the minimum horizontal stress (sv>shmax>shmin). Based on visual inspection of the limited stress magnitude data in the Great Basin, we used magnitudes such that shmin/shmax = .527 and shmin/sv= .46. These values are consistent with stress magnitude data at both Dixie Valley (Hickman et al., 2000) and Yucca Mountain (Stock et al., 1985). For faults within the Walker Lane/Eastern California Shear Zone, we applied a strike?slip faulting stress, where shmax > sv > shmin. Upon visual inspection of limited stress magnitude data from the Walker Lane and Eastern California Shear zone, we chose values such that SHmin/SHmax = .46 and Shmin/Sv= .527

  13. Regional Slip Tendency Analysis of the Great Basin Region

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

    Faulds, James E.

    2013-09-30

    - The resulting along?fault and fault?to?fault variation in slip or dilation potential is a proxy for along fault and fault?to?fault variation in fluid flow conduit potential. Stress Magnitudes and directions were calculated across the entire Great Basin. Stress field variation within each focus area was approximated based on regional published data and the world stress database (Hickman et al., 2000; Hickman et al., 1998 Robertson?Tait et al., 2004; Hickman and Davatzes, 2010; Davatzes and Hickman, 2006; Blake and Davatzes 2011; Blake and Davatzes, 2012; Moeck et al., 2010; Moos and Ronne, 2010 and Reinecker et al., 2005). The minimum horizontal stress direction (Shmin) was contoured, and spatial bins with common Shmin directions were calculated. Based on this technique, we subdivided the Great Basin into nine regions (Shmin <070, 070140). Slip and dilation tendency were calculated using 3DStress for the faults within each region using the mean Shmin for the region. Shmin variation throughout Great Basin are shown on Figure 3. For faults within the Great Basin proper, we applied a normal faulting stress regime, where the vertical stress (sv) is larger than the maximum horizontal stress (shmax), which is larger than the minimum horizontal stress (sv>shmax>shmin). Based on visual inspection of the limited stress magnitude data in the Great Basin, we used magnitudes such that shmin/shmax = .527 and shmin/sv= .46. These values are consistent with stress magnitude data at both Dixie Valley (Hickman et al., 2000) and Yucca Mountain (Stock et al., 1985). For faults within the Walker Lane/Eastern California Shear Zone, we applied a strike?slip faulting stress, where shmax > sv > shmin. Upon visual inspection of limited stress magnitude data from the Walker Lane and Eastern California Shear zone, we chose values such that SHmin/SHmax = .46 and Shmin/Sv= .527

  14. Evidence for island effects and diurnal signals in satellite images of clouds over the tropical western pacific

    SciTech Connect (OSTI)

    Barr-Kumarakulasinghe, S.A.; Reynolds, R.M.; Minnett, P.J.

    1996-04-01

    Instruments to measure atmospheric radiation and ancillary meteorological variables will be set up on Manus Island as the first site of the tropical western pacific (TWP) locale of the Atmospheric Radiation Measurements (ARM) program. Manus is in the {open_quotes}warm pool{close_quotes} region of the TWP. This region is critical in establishing global atmospheric circulation patterns and is a primary energy source for the Hadley and Walker cells. The myriad islands and enclosed seas in the immediate vicinity of Manus have been referred to as the {open_quotes}maritime continent{close_quotes}, which has the deepest convective activity in the world. Manus is in a region having a global impact on climate and where island effects on clouds are likely to be important. In this preliminary analysis we have sought evidence of island effects in the cloud fields around Manus and have studied the variability of the diurnal cycles of cloud cover over Manus and over other islands and areas of open sea in the region.

  15. Comparison of Mesomechanical and Continuum Granular Flow Models for Ceramics

    SciTech Connect (OSTI)

    Curran, D. R.

    2006-07-28

    Constitutive models for the shear strength of ceramics undergoing fracture are needed for modeling long rod and shaped-charge jet penetration events in ceramic armor. The ceramic material ahead of the penetrator has been observed to be finely comminuted material that flows around the nose of the eroding penetrator (Shockey et al.). The most-used continuum models are of the Drucker-Prager type with an upper cutoff, or of the Mohr-Coulomb type with strain rate dependence and strain softening. A disadvantage of such models is that they have an unclear connection to the actual microscopic processes of granular flow and comminution. An alternate approach is to use mesomechanical models that describe the dynamics of the granular flow, as well as containing a description of the granular comminution and resultant material softening. However, a disadvantage of the mesomechanical models is that they are computationally more burdensome to apply. In the present paper, we compare the behaviors of a mesomechanical model, FRAGBED2, with the Walker and Johnson-Holmquist continuum models, where the granular material is subjected to simple strain histories under various confining pressures and strain rates. We conclude that the mesomechanical model can provide valuable input to the continuum models, both in interpretation of the continuum models' parameters and in suggesting their range of applicability.

  16. Alum Innovative Exploration Project (Ram Power Inc.)

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

    Miller, Clay

    Data generated from the Alum Innovative Exploration Project, one of several promising geothermal properties located in the middle to upper Miocene (~11-5 Ma, or million years BP) Silver Peak-Lone Mountain metamorphic core complex (SPCC) of the Walker Lane structural belt in Esmeralda County, west-central Nevada. The geothermal system at Alum is wholly concealed; its upper reaches discovered in the late 1970s during a regional thermal-gradient drilling campaign. The prospect boasts several shallow thermal-gradient (TG) boreholes with TG >75oC/km (and as high as 440oC/km) over 200-m intervals in the depth range 0-600 m. Possibly boiling water encountered at 239 m depth in one of these boreholes returned chemical- geothermometry values in the range 150-230oC. GeothermEx (2008) has estimated the electrical- generation capacity of the current Alum leasehold at 33 megawatts for 20 years; and the corresponding value for the broader thermal anomaly extending beyond the property at 73 megawatts for the same duration.

  17. Structural investigations of Great Basin geothermal fields: Applications and implications

    SciTech Connect (OSTI)

    Faulds, James E; Hinz, Nicholas H.; Coolbaugh, Mark F

    2010-11-01

    Because fractures and faults are commonly the primary pathway for deeply circulating hydrothermal fluids, structural studies are critical to assessing geothermal systems and selecting drilling targets for geothermal wells. Important tools for structural analysis include detailed geologic mapping, kinematic analysis of faults, and estimations of stress orientations. Structural assessments are especially useful for evaluating geothermal fields in the Great Basin of the western USA, where regional extension and transtension combine with high heat flow to generate abundant geothermal activity in regions having little recent volcanic activity. The northwestern Great Basin is one of the most geothermally active areas in the USA. The prolific geothermal activity is probably due to enhanced dilation on N- to NNE-striking normal faults induced by a transfer of NW-directed dextral shear from the Walker Lane to NW-directed extension. Analysis of several geothermal fields suggests that most systems occupy discrete steps in normal fault zones or lie in belts of intersecting, overlapping, and/or terminating faults. Most fields are associated with steeply dipping faults and, in many cases, with Quaternary faults. The structural settings favoring geothermal activity are characterized by subvertical conduits of highly fractured rock along fault zones oriented approximately perpendicular to the WNW-trending least principal stress. Features indicative of these settings that may be helpful in guiding exploration for geothermal resources include major steps in normal faults, interbasinal highs, groups of relatively low discontinuous ridges, and lateral jogs or terminations of mountain ranges.

  18. Alum Innovative Exploration Project (Ram Power Inc.)

    SciTech Connect (OSTI)

    Miller, Clay

    2010-01-01

    Data generated from the Alum Innovative Exploration Project, one of several promising geothermal properties located in the middle to upper Miocene (~11-5 Ma, or million years BP) Silver Peak-Lone Mountain metamorphic core complex (SPCC) of the Walker Lane structural belt in Esmeralda County, west-central Nevada. The geothermal system at Alum is wholly concealed; its upper reaches discovered in the late 1970s during a regional thermal-gradient drilling campaign. The prospect boasts several shallow thermal-gradient (TG) boreholes with TG >75oC/km (and as high as 440oC/km) over 200-m intervals in the depth range 0-600 m. Possibly boiling water encountered at 239 m depth in one of these boreholes returned chemical- geothermometry values in the range 150-230oC. GeothermEx (2008) has estimated the electrical- generation capacity of the current Alum leasehold at 33 megawatts for 20 years; and the corresponding value for the broader thermal anomaly extending beyond the property at 73 megawatts for the same duration.

  19. Luminosity distance in 'Swiss cheese' cosmology with randomized voids. I. Single void size

    SciTech Connect (OSTI)

    Vanderveld, R. Ali; Flanagan, Eanna E.; Wasserman, Ira

    2008-10-15

    Recently, there have been suggestions that the Type Ia supernova data can be explained using only general relativity and cold dark matter with no dark energy. In 'Swiss cheese' models of the Universe, the standard Friedmann-Robertson-Walker picture is modified by the introduction of mass-compensating spherical inhomogeneities, typically described by the Lemaitre-Tolman-Bondi metric. If these inhomogeneities correspond to underdense cores surrounded by mass-compensating overdense shells, then they can modify the luminosity distance-redshift relation in a way that can mimic accelerated expansion. It has been argued that this effect could be large enough to explain the supernova data without introducing dark energy or modified gravity. We show that the large apparent acceleration seen in some models can be explained in terms of standard weak field gravitational lensing together with insufficient randomization of void locations. The underdense regions focus the light less than the homogeneous background, thus dimming supernovae in a way that can mimic the effects of acceleration. With insufficient randomization of the spatial location of the voids and of the lines of sight, coherent defocusing can lead to anomalously large demagnification effects. We show that a proper randomization of the voids and lines of sight reduces the effect to the point that it can no longer explain the supernova data.

  20. New counterterms induced by trans-Planckian physics in semiclassical gravity

    SciTech Connect (OSTI)

    Nacir, D. Lopez; Mazzitelli, F. D.

    2008-08-15

    We consider free and self-interacting quantum scalar fields satisfying modified dispersion relations in the framework of Einstein-Aether theory. Using adiabatic regularization, we study the renormalization of the equation for the mean value of the field in the self-interacting case, and the renormalization of the semiclassical Einstein-Aether equations for free fields. In both cases we consider Bianchi type I background spacetimes. Contrary to what happens for free fields in flat Robertson-Walker spacetimes, the self-interaction and/or the anisotropy produce nonpurely geometric terms in the adiabatic expansion, i.e. terms that involve both the metric g{sub {mu}}{sub {nu}} and the aether field u{sub {mu}}. We argue that, in a general spacetime, the renormalization of the theory would involve new counterterms constructed with g{sub {mu}}{sub {nu}} and u{sub {mu}}, generating a fine-tuning problem for the Einstein-Aether theory.

  1. Sigma-model aether

    SciTech Connect (OSTI)

    Carroll, Sean M.; Dulaney, Timothy R.; Gresham, Moira I.; Tam, Heywood

    2009-03-15

    Theories of low-energy Lorentz violation by a fixed-norm 'aether' vector field with two-derivative kinetic terms have a globally bounded Hamiltonian and are perturbatively stable only if the vector is timelike and the kinetic term in the action takes the form of a sigma model. Here we investigate the phenomenological properties of this theory. We first consider the propagation of modes in the presence of gravity and show that there is a unique choice of curvature coupling that leads to a theory without superluminal modes. Experimental constraints on this theory come from a number of sources, and we examine bounds in a two-dimensional parameter space. We then consider the cosmological evolution of the aether, arguing that the vector will naturally evolve to be orthogonal to constant-density hypersurfaces in a Friedmann-Robertson-Walker cosmology. Finally, we examine cosmological evolution in the presence of an extra compact dimension of space, concluding that a vector can maintain a constant projection along the extra dimension in an expanding universe only when the expansion is exponential.

  2. Airborne gamma-ray spectrometer and magnetometer survey: Peoria, Decater, Belleville Quadrangles, (IL). Final report

    SciTech Connect (OSTI)

    Not Available

    1981-01-01

    An airborne combined radiometric and magnetic survey was performed for the Department of Energy (DOE) over the area covered by the Peoria, Decatur, and Belleville, 1:250,000 National Topographic Map Series (NTMS), quadrangle maps. The survey was part of DOE's National Uranium Resource Evaluation (NURE) program. Data were collected by a helicopter equipped with a gamma-ray spectrometer with a large crystal volume, and with a high sensitivity proton procession magnetometer. The radiometric system was calibrated at the Walker Field Calibration pads and the Lake Mead Dynamic Test Range. Data quality was ensured during the survey by daily test flights and equipment checks. Radiometric data were corrected for live time, aircraft and equipment background, cosmic background, atmospheric radon, Compton scatter, and altitude dependence. The corrected data were statistically evaluated, plotted, and contoured to produce anomaly maps based on the radiometric response of individual geological units. The anomalies were interpreted and an interpretation map produced. Volume I contains a description of the systems used in the survey, a discussion of the calibration of the systems, the data collection procedures, the data processing procedures, the data presentation, the interpretation rationale, and the interpretation methodology. A separate Volume II for each quadrangle contains the data displays and the interpretation results.

  3. Analysis of carbon-oxygen reactions by use of a square-input response technique and {sup 18}O isotope

    SciTech Connect (OSTI)

    Miura, Kouichi; Nakagawa, Hiroyuki

    1996-12-31

    Carbon gasification reaction has been investigated for decades including the pioneering works of Walker and his co-workers, but its mechanism has not been completely elucidated. The concept of the active surface area (ASA) was proposed by them, and its importance has been recognized. However, since ASA was measured by O{sub 2} chemisorption at below 300{degrees}C where carbon loss through gasification is negligible, it does not reflect the actual gasification situation. To overcome this weak point, measurements of ASA in a batch reactor and the so-called transient kinetic (TK) method were proposed. Ahmed and Back successfully measured the chemisorbed oxygen during the gasification using a batch reactor, and proposed a new mechanistic sequence for carbon-oxygen reaction which stresses the importance of the reaction between the gaseous oxygen and the chemisorbed oxygen. Radovic et al. proposed the concept of the reactive surface area (RSA), and reported excellent proportionality between the CO{sub 2} gasification rate and the RSA estimated by the TK and the TPD methods. Kapteijn et al. showed that the TK method with labeled molecules is more powerful to examine the mechanism. They found the presence of two types of surface oxygen complexes which desorb at different rates. A Square-input response (SIR) method is applied to the carbon-oxygen reaction. This method allows the observation of transient changes on two step changes. This method has been successfully applied to the analysis of a coal char gasification.

  4. X-ray microtomography shows pore structure and tortuosity in alkali-activated binders

    SciTech Connect (OSTI)

    Provis, John L.; Myers, Rupert J.; White, Claire E.; Rose, Volker; Deventer, Jannie S.J. van

    2012-06-15

    Durability of alkali-activated binders is of vital importance in their commercial application, and depends strongly on microstructure and pore network characteristics. X-ray microtomography ({mu}CT) offers, for the first time, direct insight into microstructural and pore structure characteristics in three dimensions. Here, {mu}CT is performed on a set of sodium metasilicate-activated fly ash/slag blends, using a synchrotron beamline instrument. Segmentation of the samples into pore and solid regions is then conducted, and pore tortuosity is calculated by a random walker method. Segmented porosity and diffusion tortuosity are correlated, and vary as a function of slag content (slag addition reduces porosity and increases tortuosity), and sample age (extended curing gives lower porosity and higher tortuosity). This is particularly notable for samples with {>=} 50% slag content, where a space-filling calcium (alumino)silicate hydrate gel provides porosity reductions which are not observed for the sodium aluminosilicate ('geopolymer') gels which do not chemically bind water of hydration.

  5. Dirac fields, torsion and Barbero-Immirzi parameter in cosmology

    SciTech Connect (OSTI)

    Berredo-Peixoto, G. de; Shapiro, I.L.; Souza, C.A. de; Freidel, L. E-mail: lfreidel@perimeterinstitute.ca E-mail: abrahaocleber@gmail.com

    2012-06-01

    We consider cosmological solution for Einstein gravity with massive fermions with a four-fermion coupling, which emerges from the Holst action and is related to the Barbero-Immirzi (BI) parameter. This gravitational action is an important object of investigation in a non-perturbative formalism of quantum gravity. We study the equation of motion for the Dirac field within the standard Friedman-Robertson-Walker (FRW) metric. Finally, we show the theory with BI parameter and minimally coupling Dirac field, in the zero mass limit, is equivalent to an additional term which looks like a perfect fluid with the equation of state p = wρ, with w = 1 which is independent of the BI parameter. The existence of mass imposes a variable w, which creates either an inflationary phase with w = −1, or assumes an ultra hard equation of states w = 1 for very early universe. Both phases relax to a pressure less fluid w = 0 for late universe (corresponding to the limit m → ∞)

  6. Preliminary survey of tuff distribution in Esmeralda, Nye, and Lincoln Counties, Nevada

    SciTech Connect (OSTI)

    Smith, G.V.; Pink, T.S.; Lawrence, J.R.; Woodward, L.A.; Keil, K.; Lappin, A.R.

    1981-02-01

    This report inventories the surface distribution of silicic tuffs in Nye, Esmeralda, and Lincoln Counties, NV, based on a review of available literature. The inventory was taken to provide a data base in evaluating tuff sites for the disposal of high-level nuclear waste. Silicic ash-flow tuffs that are about 11 to 34 million years (my) old are widespread in these counties. These rocks are locally deformed by right-lateral movement along Walker Lane and the Las Vegas Shear Zone, and left-lateral movement along a zone from near the Nevada Test Site (NTS) to the Utah border, and are commonly offset by steeply dipping normal faults. The normal faults that bound horsts, grabens, and tilted-fault blocks of the Basin-and-Range Province began to form 30 my ago; some are still active. Tuff distribution is discussed on a regional basis. Tuff thicknesses and alterations, structural complexity, and proximity to recent faulting, recent volcanism, and mineral resources are discussed for each area. Although the literature on which it is based is often incomplete and sketchy, this report is intended to serve as a basis for future, more detailed work that includes initial field inspection, detailed field and laboratory studies, and extrapolations to the subsurface.

  7. Energy of Einstein's static universe and its implications for the ΛCDM cosmology

    SciTech Connect (OSTI)

    Mitra, Abhas

    2013-03-01

    The total Einstein energy (P{sub 0}) of a homogeneous and isotropic universe can be computed by using an appropriate superpotential (Rosen 1994) and also by a direct method (Mitra 2010). Irrespective of the physical significance of P{sub 0}, its eventual numerical value must be same in both the cases because both are derived from the same Einstein pseudo tensor and by employing the same coordinates. It follows then that the static isotropic and homogeneous universe, i.e., Einstein's static universe (ESU), must have an infinite radius and which tantamounts to a spatially flat case. The physical significance of this result is that the cosmological constant, Λ, is actually zero and ESU is the vacuous Minkowski spacetime. It is the same result which has recently been obtained in a completely independent manner (Mitra, Bhattacharyya and Bhatt 2013). Thus even though, mathematically, one can conceive of a static 3-sphere for the foundation of relativistic cosmology, physically, no such 3-sphere exists. On the other hand, the spatial section of the universe could essentially be an Euclidean space with local curvature spikes due to presence of lumpy matter. Since the ''Dark Energy'' is associated with Λ in the ΛCDM model, the result obtained here suggests that it is an artifact of departure of the lumpy and fractal universe from the ideal Friedmann Robertson Walker model (Jackson et al. 2012, Cowley et al. 2013)

  8. Future singularities and teleparallelism in loop quantum cosmology

    SciTech Connect (OSTI)

    Bamba, Kazuharu; Haro, Jaume de; Odintsov, Sergei D. E-mail: jaime.haro@upc.edu

    2013-02-01

    We demonstrate how holonomy corrections in loop quantum cosmology (LQC) prevent the Big Rip singularity by introducing a quadratic modification in terms of the energy density ? in the Friedmann equation in the Friedmann-Lematre-Robertson-Walker (FLRW) space-time in a consistent and useful way. In addition, we investigate whether other kind of singularities like Type II,III and IV singularities survive or are avoided in LQC when the universe is filled by a barotropic fluid with the state equation P = ???f(?), where P is the pressure and f(?) a function of ?. It is shown that the Little Rip cosmology does not happen in LQC. Nevertheless, the occurrence of the Pseudo-Rip cosmology, in which the phantom universe approaches the de Sitter one asymptotically, is established, and the corresponding example is presented. It is interesting that the disintegration of bound structures in the Pseudo-Rip cosmology in LQC always takes more time than that in Einstein cosmology. Our investigation on future singularities is generalized to that in modified teleparallel gravity, where LQC and Brane Cosmology in the Randall-Sundrum scenario are the best examples. It is remarkable that F(T) gravity may lead to all the kinds of future singularities including Little Rip.

  9. Region with trapped surfaces in spherical symmetry, its core, and their boundaries

    SciTech Connect (OSTI)

    Bengtsson, Ingemar; Senovilla, Jose M. M.

    2011-02-15

    We consider the region T in spacetime containing future-trapped closed surfaces and its boundary B, and derive some of their general properties. We then concentrate on the case of spherical symmetry, but the methods we use are general and applicable to other situations. We argue that closed trapped surfaces have a nonlocal property, ''clairvoyance'', which is inherited by B. We prove that B is not a marginally trapped tube in general, and that it can have portions in regions whose whole past is flat. For asymptotically flat black holes, we identify a general past barrier, well inside the event horizon, to the location of B under physically reasonable conditions. We also define the core Z of the trapped region as that part of T which is indispensable to sustain closed trapped surfaces. We prove that the unique spherically symmetric dynamical horizon is the boundary of such a core, and we argue that this may serve to single it out. To illustrate the results, some explicit examples are discussed, namely, Robertson-Walker geometries and the imploding Vaidya spacetime.

  10. Cosmological QCD phase transition in steady non-equilibrium dissipative Ho?avaLifshitz early universe

    SciTech Connect (OSTI)

    Khodadi, M. Sepangi, H.R.

    2014-07-15

    We study the phase transition from quarkgluon plasma to hadrons in the early universe in the context of non-equilibrium thermodynamics. According to the standard model of cosmology, a phase transition associated with chiral symmetry breaking after the electro-weak transition has occurred when the universe was about 110?s old. We focus attention on such a phase transition in the presence of a viscous relativistic cosmological background fluid in the framework of non-detailed balance Ho?avaLifshitz cosmology within an effective model of QCD. We consider a flat FriedmannRobertsonWalker universe filled with a non-causal and a causal bulk viscous cosmological fluid respectively and investigate the effects of the running coupling constants of Ho?avaLifshitz gravity, ?, on the evolution of the physical quantities relevant to a description of the early universe, namely, the temperature T, scale factor a, deceleration parameter q and dimensionless ratio of the bulk viscosity coefficient to entropy density (?)/s . We assume that the bulk viscosity cosmological background fluid obeys the evolution equation of the steady truncated (Eckart) and full version of the IsraelStewart fluid, respectively. -- Highlights: In this paper we have studied quarkhadron phase transition in the early universe in the context of the Ho?avaLifshitz model. We use a flat FRW universe with the bulk viscosity cosmological background fluid obeying the evolution equation of the steady truncated (Eckart) and full version of the IsraelStewart fluid, respectively.

  11. Teleconnections of the Southern Oscillation in the tropical Atlantic sector in the OSU coupled upper ocean-atomosphere GCM

    SciTech Connect (OSTI)

    Hameed, S.; Meinster, A. ); Sperber, K.R. )

    1993-03-01

    The Oregon State University coupled upper ocean-atmosphere GCM has been shown to qualitatively simulate the Southern Oscillation. A composite analysis of the warm and cold events simulated in this 23-year integration has been performed. During the low phase of the Southern Oscillation, when warm anomalies occur in the eastern Pacific, the model simulates for the Atlantic region during March-May (1) a deficit of precipitation over the tropical South American continent, (2) Caribbean and Gulf of Mexico sea level pressure and sea surface temperature are in phase with the eastern Pacific anomalies, while those east of the Nordeste region are out of phase, and (3) northeast trade winds are anomalously weak and southwest trade winds are anomalously strong (as inferred from surface current anomalies). The anomalies in the oceanic processes are induced by perturbations in the atmospheric circulation over the Atlantic and are coupled to changes in the Walker circulation. During the high phase of the simulated Southern Oscillation, conditions in the atmosphere and ocean are essentially the reverse of the low phase. The model produces a response in the South American region during the opposing phases of the Southern Oscillation that is in general agreement with observations. The interannual variation of Nordeste rainfall is shown to be dominated by a few band-limited frequencies. These frequencies are found in the SST series of those regions of the Atlantic and Pacific oceans where strong correlations with Nordeste precipitation exist.

  12. The house of the future

    ScienceCinema (OSTI)

    None

    2010-09-01

    Learn what it will take to create tomorrow's net-zero energy home as scientists reveal the secrets of cool roofs, smart windows, and computer-driven energy control systems. The net-zero energy home: Scientists are working to make tomorrow's homes more than just energy efficient -- they want them to be zero energy. Iain Walker, a scientist in the Lab's Energy Performance of Buildings Group, will discuss what it takes to develop net-zero energy houses that generate as much energy as they use through highly aggressive energy efficiency and on-site renewable energy generation. Talking back to the grid: Imagine programming your house to use less energy if the electricity grid is full or price are high. Mary Ann Piette, deputy director of Berkeley Lab's building technology department and director of the Lab's Demand Response Research Center, will discuss how new technologies are enabling buildings to listen to the grid and automatically change their thermostat settings or lighting loads, among other demands, in response to fluctuating electricity prices. The networked (and energy efficient) house: In the future, your home's lights, climate control devices, computers, windows, and appliances could be controlled via a sophisticated digital network. If it's plugged in, it'll be connected. Bruce Nordman, an energy scientist in Berkeley Lab's Energy End-Use Forecasting group, will discuss how he and other scientists are working to ensure these networks help homeowners save energy.

  13. Putting Carbon in its Place: What You Can Do (LBNL Science at the Theater)

    ScienceCinema (OSTI)

    Walker, Iain; Regnier, Cindy [LBNL, Environmental Energy Technologies Division

    2011-04-28

    Science at the Theater: Berkeley Lab scientists reveal the latest research on how to reduce your carbon footprint at home, work, and when you shop. Learn how even small choices can have a big impact. Iain Walker's research focuses on optimizing the energy use and comfort of buildings. He's a staff scientist in the Energy Performance of Buildings Group, which is part of Berkeley Lab's Environmen...tal Energy Technologies Division. He's also executive editor of Home Energy Magazine. Cindy Regnier is a Project Manager in the Environmental Energy Technologies Division at Berkeley Lab. She has over 13 years of mechanical engineering design experience, with a focus on low-energy buildings. Her projects have included several LEED Platinum buildings and the design of a 200,000 sf carbon neutral, net-zero energy science museum in San Francisco. Eric Masanet is Acting Deputy Leader of the International Energy Studies Group at Berkeley Lab. His research focuses on life-cycle assessments and energy efficiency analysis. He holds a joint research appointment in the Institute of Transportation Studies at UC Berkeley.

  14. Spherically symmetric analysis on open FLRW solution in non-linear massive gravity

    SciTech Connect (OSTI)

    Chiang, Chien-I; Izumi, Keisuke; Chen, Pisin E-mail: izumi@phys.ntu.edu.tw

    2012-12-01

    We study non-linear massive gravity in the spherically symmetric context. Our main motivation is to investigate the effect of helicity-0 mode which remains elusive after analysis of cosmological perturbation around an open Friedmann-Lemaitre-Robertson-Walker (FLRW) universe. The non-linear form of the effective energy-momentum tensor stemming from the mass term is derived for the spherically symmetric case. Only in the special case where the area of the two sphere is not deviated away from the FLRW universe, the effective energy momentum tensor becomes completely the same as that of cosmological constant. This opens a window for discriminating the non-linear massive gravity from general relativity (GR). Indeed, by further solving these spherically symmetric gravitational equations of motion in vacuum to the linear order, we obtain a solution which has an arbitrary time-dependent parameter. In GR, this parameter is a constant and corresponds to the mass of a star. Our result means that Birkhoff's theorem no longer holds in the non-linear massive gravity and suggests that energy can probably be emitted superluminously (with infinite speed) on the self-accelerating background by the helicity-0 mode, which could be a potential plague of this theory.

  15. FRW quantum cosmology with a generalized Chaplygin gas

    SciTech Connect (OSTI)

    Bouhmadi-Lopez, Mariam; Moniz, Paulo Vargas

    2005-03-15

    Cosmologies with a Chaplygin gas have recently been explored with the objective of explaining the transition from a dust dominated epoch towards an accelerating expansion stage. In this context, we consider the hypothesis that this transition involves a quantum mechanical process. Our analysis is entirely analytical, with the objective of finding explicit mathematical expressions for the different quantum mechanical states and their cosmological implications. We employ a Friedmann-Robertson-Walker (FRW) minisuperspace model, characterized by two Lorentzian sectors, separated by a classically forbidden region. This is the configuration associated with the evolution of a generalized Chaplygin gas in a FRW universe. The Hartle-Hawking and Vilenkin wave functions are then computed, together with the transition amplitudes towards the accelerating epoch. Furthermore, for specific initial conditions we found that the generalized Chaplygin gas parameters become related through an expression involving an integer n. We also introduce a phenomenological association between some brane-world scenarios and a FRW minisuperspace cosmology with a generalized Chaplygin gas. The aim is to promote a discussion and subsequent research on the quantum creation of brane cosmologies from such a perspective. Additional results in this paper suggest that the brane tension would become related with the generalized Chaplygin gas parameters through another expression involving an integer.

  16. Aspects of structural landscape of human islet amyloid polypeptide

    SciTech Connect (OSTI)

    He, Jianfeng Dai, Jin; Li, Jing; Peng, Xubiao; Niemi, Antti J.

    2015-01-28

    The human islet amyloid polypeptide (hIAPP) co-operates with insulin to maintain glycemic balance. It also constitutes the amyloid plaques that aggregate in the pancreas of type-II diabetic patients. We have performed extensive in silico investigations to analyse the structural landscape of monomeric hIAPP, which is presumed to be intrinsically disordered. For this, we construct from first principles a highly predictive energy function that describes a monomeric hIAPP observed in a nuclear magnetic resonance experiment, as a local energy minimum. We subject our theoretical model of hIAPP to repeated heating and cooling simulations, back and forth between a high temperature regime where the conformation resembles a random walker and a low temperature limit where no thermal motions prevail. We find that the final low temperature conformations display a high level of degeneracy, in a manner which is fully in line with the presumed intrinsically disordered character of hIAPP. In particular, we identify an isolated family of α-helical conformations that might cause the transition to amyloidosis, by nucleation.

  17. Nuclear matter in the early universe

    SciTech Connect (OSTI)

    Barros, Celso de Camargo; Cunha, Ivan Eugênio da

    2015-12-17

    Recently, extreme conditions have been obtained in ultra-relativistic heavy ion collisions at RHIC and at the Large Hadron collider. It is believed that these conditions are similar to the ones of the early Universe, in the time between 10{sup −6}s and 1s, approximately. In this work, the hadrons produced in this range of time will be studied, considering some aspects of the systems produced in the heavy-ion collisions. We will study a phase posterior to the phase transition (in fact it is believed to be a crossover) from the quark-gluon plasma, that is the hadronic phase of the Universe. We will show the model proposed in [1], considering the hadronic matter described by a relativistic model (similar to the Walecka model), considering particles described by quantum equations in a curved spacetime. This curvature is due to the mass and to the strong interactions that appears in the energy-momentum tensor. The set of the equations is proposed in the Robertson-Walker metric, and some approximate solutions are obtained.

  18. Case study field evaluation of a systems approach to retrofitting a residential HVAC system

    SciTech Connect (OSTI)

    Walker, Iain S.; McWiliams, Jennifer A.; Konopacki, Steven J.

    2003-09-01

    This case study focusing on a residence in northern California was undertaken as a demonstration of the potential of a systems approach to HVAC retrofits. The systems approach means that other retrofits that can affect the HVAC system are also considered. For example, added building envelope insulation reduces building loads so that smaller capacity HVAC system can be used. Secondly, we wanted to examine the practical issues and interactions with contractors and code officials required to accomplish the systems approach because it represents a departure from current practice. We identified problems in the processes of communication and installation of the retrofit that led to compromises in the final energy efficiency of the HVAC system. These issues must be overcome in order for HVAC retrofits to deliver the increased performance that they promise. The experience gained in this case study was used to optimize best practices guidelines for contractors (Walker 2003) that include building diagnostics and checklists as tools to assist in ensuring the energy efficiency of ''house as a system'' HVAC retrofits. The best practices guidelines proved to be an excellent tool for evaluating the eight existing homes in this study, and we received positive feedback from many potential users who reviewed and used them. In addition, we were able to substantially improve the energy efficiency of the retrofitted case study house by adding envelope insulation, a more efficient furnace and air conditioner, an economizer and by reducing duct leakage.

  19. STRUCTURAL CONTROLS OF THE EMERSON PASS GEOTHERMAL SYSTEM, NORTHWESTERN NEVADA: CHARACTERIZATION OF A "BLIND" SYSTEM

    SciTech Connect (OSTI)

    Anderson, Ryan B; Faulds, James E

    2013-10-27

    The Pyramid Lake area is favorable for geothermal development due to the tectonic setting of the region. The Walker Lane belt, a dextral shear zone that accommodates ~20% relative motion between the Pacific and North American plates, terminates northwestward in northeast California. NW-directed dextral shear is transferred to WNW extension accommodated by N-to -NNE striking normal faults of the Basin and Range. As a consequence, enhanced dilation occurs on favorably oriented faults generating high geothermal potential in the northwestern Great Basin. The NW-striking right-lateral Pyramid Lake fault, a major structure of the northern Walker Lane, terminates at the southern end of Pyramid Lake and transfers strain to the NNE-striking down to the west Lake Range fault, resulting in high geothermal potential. Known geothermal systems in the area have not been developed due to cultural considerations of the Pyramid Lake Paiute Tribe. Therefore, exploration has been focused on discovering blind geothermal systems elsewhere on the reservation by identifying structurally favorable settings and indicators of past geothermal activity. One promising area is the northeast end of Pyramid Lake, where a broad left step between the west-dipping range-bounding faults of the Lake and Fox Ranges has led to the formation of a broad, faulted relay ramp. Furthermore, tufa mounds, mineralized veins, and altered Miocene rocks occur proximal to a thermal anomaly discovered by a 2-m shallow temperature survey at the north end of the step-over in Emerson Pass. Detailed geologic mapping has revealed a system of mainly NNE-striking down to the west normal faults. However, there are three notable exceptions to this generality, including 1) a prominent NW-striking apparent right-lateral fault, 2) a NW-striking down to the south fault which juxtaposes the base of the mid-Miocene Pyramid sequence against younger late Tertiary sedimentary rocks, and 3) a NNE-striking down to the east normal fault

  20. Regional Slip Tendency Analysis of the Great Basin Region

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

    Faulds, James E.

    2013-09-30

    are shown on Figure 3. For faults within the Great Basin proper, we applied a normal faulting stress regime, where the vertical stress (sv) is larger than the maximum horizontal stress (shmax), which is larger than the minimum horizontal stress (sv>shmax>shmin). Based on visual inspection of the limited stress magnitude data in the Great Basin, we used magnitudes such that shmin/shmax = .527 and shmin/sv= .46. These values are consistent with stress magnitude data at both Dixie Valley (Hickman et al., 2000) and Yucca Mountain (Stock et al., 1985). For faults within the Walker Lane/Eastern California Shear Zone, we applied a strike‐slip faulting stress, where shmax > sv > shmin. Upon visual inspection of limited stress magnitude data from the Walker Lane and Eastern California Shear zone, we chose values such that SHmin/SHmax = .46 and Shmin/Sv= .527 representative of the region. Results: The results of our slip and dilation tendency analysis are shown in Figures 4 (dilation tendency), 5 (slip tendency) and 6 (slip tendency + dilation tendency). Shmin varies from northwest to east‐west trending throughout much of the Great Basin. As such, north‐ to northeast‐striking faults have the highest tendency to slip and to dilate, depending on the local trend of shmin. These results provide a first order filter on faults and fault systems in the Great Basin, affording focusing of local‐scale exploration efforts for blind or hidden geothermal resources.

  1. Geology of the Yucca Mountain Region, Chapter in Stuckless, J.S., ED., Yucca Mountain, Nevada - A Proposed Geologic Repository for High-Level Radioactive Waste

    SciTech Connect (OSTI)

    J.S. Stuckless; D. O'Leary

    2006-09-25

    Yucca Mountain has been proposed as the site for the Nation's first geologic repository for high-level radioactive waste. This chapter provides the geologic framework for the Yucca Mountain region. The regional geologic units range in age from late Precambrian through Holocene, and these are described briefly. Yucca Mountain is composed dominantly of pyroclastic units that range in age from 11.4 to 15.2 Ma. The proposed repository would be constructed within the Topopah Spring Tuff, which is the lower of two major zoned and welded ash-flow tuffs within the Paintbrush Group. The two welded tuffs are separated by the partly to nonwelded Pah Canyon Tuff and Yucca Mountain Tuff, which together figure prominently in the hydrology of the unsaturated zone. The Quaternary deposits are primarily alluvial sediments with minor basaltic cinder cones and flows. Both have been studied extensively because of their importance in predicting the long-term performance of the proposed repository. Basaltic volcanism began about 10 Ma and continued as recently as about 80 ka with the eruption of cones and flows at Lathrop Wells, approximately 10 km south-southwest of Yucca Mountain. Geologic structure in the Yucca Mountain region is complex. During the latest Paleozoic and Mesozoic, strong compressional forces caused tight folding and thrust faulting. The present regional setting is one of extension, and normal faulting has been active from the Miocene through to the present. There are three major local tectonic domains: (1) Basin and Range, (2) Walker Lane, and (3) Inyo-Mono. Each domain has an effect on the stability of Yucca Mountain.

  2. Coeur d'Alene Tribal Production Facility, Volume II of III, 2002-2003 Progress Report.

    SciTech Connect (OSTI)

    Anders, Paul

    2003-01-01

    This appendices covers the following reports: (1) Previous ISRP Reviews (Project 199004400) Implement Fisheries Enhancement Opportunities-Coeur d'Alene Reservation; (2) Step 1 review of the hatchery master plan (Memorandum from Mark Fritsch, Fish Production Coordinator, Draft version March 10, 2000); (3) Coeur d'Alene Tribe response to ISRP comments on Project No. 199004402; includes attachment A Water Quantity Report. This is an incomplete document Analysis of Well Yield Potential for a Portion of the Coeur d'Alene Reservation near Worley, Idaho, February 2001; (4) Coeur d'Alene Tribe Fisheries Program, Rainbow Trout Feasibility Report on the Coeur d'Alene Indian Reservation prepared by Ronald L. Peters, February 2001; (5) Coeur d'Alene Tribe response letter pursuant to the questions raised in the Step 1 review of the Coeur d'Alene Tribe Trout Production Facility from Ronald L. Peters, March 27, 2001 ; includes attachments Water quantity report (this is the complete report), Appendix A Logs for Test Wells and 1999 Worley West Park Well, letters from Ralston, Appendix B Cost of Rainbow Purchase Alternative; (6) NPPC response (memorandum from Mark Fritsch, March 28, 2001); (7) Response to NPPC (letter to Frank Cassidy, Jr., Chair, from Ernest L. Stensgar, April 18, 2001); (8) Final ISRP review (ISRP 2001-4: Mountain Columbia Final Report); (9) Response to ISRP comment (letter to Mark Walker, Director of Public Affairs, from Ronald Peters, May 7, 2001); (10) Final comments to the Fish 4 committee; (11) Scope of Work/Budget FY 2001-2004; (12) Letter from City of Worley concerning water service; (13) Letter to BPA regarding status of Step 1 package; (14) Fisheries Habitat Evaluation on Tributaries of the Coeur d'Alene Indian Reservation, 1990 annual report; (15) Fisheries Habitat Evaluation on Tributaries of the Coeur d'Alene Indian Reservation, 1991 annual report; and (16) Fisheries Habitat Evaluation on Tributaries of the Coeur d'Alene Indian Reservation, 1992 annual

  3. Massive graviton on arbitrary background: derivation, syzygies, applications

    SciTech Connect (OSTI)

    Bernard, Laura; Deffayet, Cédric; Strauss, Mikael von

    2015-06-23

    We give the detailed derivation of the fully covariant form of the quadratic action and the derived linear equations of motion for a massive graviton in an arbitrary background metric (which were presented in arXiv:1410.8302 [hep-th]). Our starting point is the de Rham-Gabadadze-Tolley (dRGT) family of ghost free massive gravities and using a simple model of this family, we are able to express this action and these equations of motion in terms of a single metric in which the graviton propagates, hence removing in particular the need for a “reference metric' which is present in the non perturbative formulation. We show further how 5 covariant constraints can be obtained including one which leads to the tracelessness of the graviton on flat space-time and removes the Boulware-Deser ghost. This last constraint involves powers and combinations of the curvature of the background metric. The 5 constraints are obtained for a background metric which is unconstrained, i.e. which does not have to obey the background field equations. We then apply these results to the case of Einstein space-times, where we show that the 5 constraints become trivial, and Friedmann-Lemaître-Robertson-Walker space-times, for which we correct in particular some results that appeared elsewhere. To reach our results, we derive several non trivial identities, syzygies, involving the graviton fields, its derivatives and the background metric curvature. These identities have their own interest. We also discover that there exist backgrounds for which the dRGT equations cannot be unambiguously linearized.

  4. Vegetation Response to Carbon Dioxide and Climate: Data from the Carbon Dioxide Information Analysis Center (CDIAC)

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

    CDIAC products are indexed and searchable through a customized interface powered by ORNL's Mercury search engine. Products include numeric data packages, publications, trend data, atlases, and models and can be searched for by subject area, keywords, authors, product numbers, time periods, collection sites, spatial references, etc. Some of the collections may also be included in the CDIAC publication Trends Online: A Compendium of Global Change Data. Most data sets, many with numerous data files, are free to download from CDIAC's ftp area. Information related to vegetation response to carbon dioxide and climate includes: • Area and Carbon Content of Sphagnum Since Last Glacial Maximum (2002) (Trends Online) • TDE Model Intercomparison Project Data Archive • Presentations and abstracts from the recent DOE Terrestrial Science Team Meeting (Argonne National Laboratory, October 29-31, 2001) • FACE (Free-Air CO2 Enrichment) • Walker Branch Throughfall Displacement Experiment Data Report: Site Characterization, System Performance, Weather, Species Composition, and Growth (2001) • Bibliography on CO2 Effects on Vegetation and Ecosystems: 1990-1999 Literature (2000) • Direct effects of atmospheric CO2 enrichment on plants and ecosystems: An updated bibliographic data base (1994) • A Database of Herbaceous Vegetation Responses to Elevated Atmospheric CO2 (1999) • A Database of Woody Vegetation Responses to Elevated Atmospheric CO2 (1999) • Forest Responses to Anthropogenic Stress (FORAST) Database (1995) • Effects of CO2 and Nitrogen Fertilization on Growth and Nutrient Content of Juvenile Ponderosa Pine (1998) • Carbon Dioxide Enrichment: Data on the Response of Cotton to Varying CO2Irrigation, and Nitrogen (1992) • Growth and Chemical Responses to CO2 Enrichment Virginia Pine Pinus Virginiana Mill.(1985)

  5. Aerial photographic interpretation of lineaments and faults in late Cenozoic deposits in the eastern parts of the Saline Valley 1:100, 000 quadrangle, Nevada and California, and the Darwin Hills 1:100, 000 quadrangle, California

    SciTech Connect (OSTI)

    Reheis, M.C.

    1991-09-01

    Faults and fault-related lineaments in Quaternary and late Tertiary deposits in the southern part of the Walker Lane are potentially active and form patterns that are anomalous compared to those in most other areas of the Great Basin. Two maps at a scale of 1:100,000 summarize information about lineaments and faults in the area around and southwest of the Death Valley-Furnace Creek fault system based on extensive aerial-photo interpretation, limited field interpretation, limited field investigations, and published geologic maps. There are three major fault zones and two principal faults in the Saline Valley and Darwin Hills 1:100,000 quadrangles. (1) The Death Valley-Furnace Creek fault system and (2) the Hunter Mountain fault zone are northwest-trending right-lateral strike-slip fault zones. (3) The Panamint Valley fault zone and associated Towne Pass and Emigrant faults are north-trending normal faults. The intersection of the Hunter Mountain and Panamint Valley fault zones is marked by a large complex of faults and lineaments on the floor of Panamint Valley. Additional major faults include (4) the north-northwest-trending Ash Hill fault on the west side of Panamint Valley, and (5) the north-trending range-front Tin Mountain fault on the west side of the northern Cottonwood Mountains. The most active faults at present include those along the Death Valley-Furnace Creek fault system, the Tin Mountain fault, the northwest and southeast ends of the Hunter Mountain fault zone, the Ash Hill fault, and the fault bounding the west side of the Panamint Range south of Hall Canyon. Several large Quaternary landslides on the west sides of the Cottonwood Mountains and the Panamint Range apparently reflect slope instability due chiefly to rapid uplift of these ranges. 16 refs.

  6. Final Scientific/Technical Report – DE-EE0002960 Recovery Act. Detachment faulting and Geothermal Resources - An Innovative Integrated Geological and Geophysical Investigation of Pearl Hot Spring, Nevada

    SciTech Connect (OSTI)

    Stockli, Daniel F.

    2015-11-30

    The Pearl Host Spring Geothermal Project funded by the DoE Geothermal Program was a joint academic (KU/UT & OU) and industry collaboration (Sierra and Ram Power) to investigate structural controls and the importance of low-angle normal faults on geothermal fluid flow through a multifaceted geological, geophysical, and geochemical investigation in west-central Nevada. The study clearly showed that the geothermal resources in Clayton Valley are controlled by the interplay between low-angle normal faults and active deformation related to the Walker Lane. The study not only identified potentially feasible blind geothermal resource plays in eastern Clayton Valley, but also provide a transportable template for exploration in the area of west-central Nevada and other regional and actively-deforming releasing fault bends. The study showed that deep-seated low-angle normal faults likely act as crustal scale permeability boundaries and could play an important role in geothermal circulation and funneling geothermal fluid into active fault zones. Not unique to this study, active deformation is viewed as an important gradient to rejuvenated fracture permeability aiding the long-term viability of blind geothermal resources. The technical approach for Phase I included the following components, (1) Structural and geological analysis of Pearl Hot Spring Resource, (2) (U-Th)/He thermochronometry and geothermometry, (3) detailed gravity data and modeling (plus some magnetic and resistivity), (4) Reflection and Refraction Seismic (Active Source), (5) Integration with existing and new geological/geophysical data, and (6) 3-D Earth Model, combining all data in an innovative approach combining classic work with new geochemical and geophysical methodology to detect blind geothermal resources in a cost-effective fashion.

  7. Viability of the matter bounce scenario in F(T) gravity and Loop Quantum Cosmology for general potentials

    SciTech Connect (OSTI)

    Haro, Jaume; Amors, Jaume E-mail: jaume.amoros@upc.edu

    2014-12-01

    We consider the matter bounce scenario in F(T) gravity and Loop Quantum Cosmology (LQC) for phenomenological potentials that at early times provide a nearly matter dominated Universe in the contracting phase, having a reheating mechanism in the expanding or contracting phase, i.e., being able to release the energy of the scalar field creating particles that thermalize in order to match with the hot Friedmann Universe, and finally at late times leading to the current cosmic acceleration. For these potentials, numerically solving the dynamical perturbation equations we have seen that, for the particular F(T) model that we will name teleparallel version of LQC, and whose modified Friedmann equation coincides with the corresponding one in holonomy corrected LQC when one deals with the flat Friedmann-Lematre-Robertson-Walker (FLRW) geometry, the corresponding equations obtained from the well-know perturbed equations in F(T) gravity lead to theoretical results that fit well with current observational data. More precisely, in this teleparallel version of LQC there is a set of solutions which leads to theoretical results that match correctly with last BICEP2 data, and there is another set whose theoretical results fit well with Planck's experimental data. On the other hand, in the standard holonomy corrected LQC, using the perturbed equations obtained replacing the Ashtekar connection by a suitable sinus function and inserting some counter-terms in order to preserve the algebra of constrains, the theoretical value of the tensor/scalar ratio is smaller than in the teleparallel version, which means that there is always a set of solutions that matches with Planck's data, but for some potentials BICEP2 experimental results disfavours holonomy corrected LQC.

  8. Effect of increases in energy-related labor forces upon retailing in Alabama

    SciTech Connect (OSTI)

    Robicheaux, R.A.

    1983-06-01

    The heightened mining employment that will result from increased extraction of coal from Alabama's Warrior Coal Basin will boost retail sales and employment. The Warrior Coal Basin counties (Fayette, Jefferson, Tuscaloosa and Walker) are heavily dependent upon coal mining as a source of employment and wages. Further, since the counties' economies grew increasingly dependent upon coal mining activities throughout the 1970s, it was believed that it would be possible to measure, with some acceptable level of reliability, the impact of the steadily rising mining activity upon the area's retailing sector. Therefore, a small scale econometric model was developed which represents the interrelationships among income, mining and trade employment and retail sales in the four-county Warrior Coal Basin area. The results of two versions of the model are presented. In the first version, area-wide retail sales are treated in the aggregate. In the second version, retail sales are disaggregated into twelve categories (e.g., food, apparel, furniture, etc.). The models were specified using 1960 to 1976 data. The mining employment growth scenario used in this report called for steady increases in mining employment that culminated in an employment level that is 4000 above the baseline employment projections by 1985. Both versions of the model predicted that cumulative real regional income would increase by $1.39 billion over seven years with the added mining employment. The predicted impacts on trade employment and real retail sales varied between the two models, however. The aggregate model predicts the addition of 7500 trade workers and an additional $1.35 billion in real retail sales. The disaggregate model suggests that food stores, automobile dealers, general merchandise stores, gas stations and lumber and building materials retailers would enjoy the greatest positive benefits.

  9. The crystal structure of {pi}-ErBO{sub 3}: New single-crystal data for an old problem

    SciTech Connect (OSTI)

    Pitscheider, Almut [Institut fuer Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universitaet Innsbruck, Innrain 52a, A-6020 Innsbruck (Austria); Kaindl, Reinhard [Institut fuer Mineralogie und Petrographie, Leopold-Franzens-Universitaet Innsbruck, Innrain 52, A-6020 Innsbruck (Austria); Oeckler, Oliver [Department Chemie, Ludwig-Maximilians-Universitaet Muenchen, Butenandtstrasse 5-13, D-81377 Muenchen (Germany); Huppertz, Hubert, E-mail: Hubert.Huppertz@uibk.ac.a [Institut fuer Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universitaet Innsbruck, Innrain 52a, A-6020 Innsbruck (Austria)

    2011-01-15

    Single crystals of the orthoborate {pi}-ErBO{sub 3} were synthesized from Er{sub 2}O{sub 3} and B{sub 2}O{sub 3} under high-pressure/high-temperature conditions of 2 GPa and 800 {sup o}C in a Walker-type multianvil apparatus. The crystal structure was determined on the basis of single-crystal X-ray diffraction data, collected at room temperature. The title compound crystallizes in the monoclinic pseudowollastonite-type structure, space group C2/c, with the lattice parameters a=1128.4(2) pm, b=652.6(2) pm, c=954.0(2) pm, and {beta}=112.8(1){sup o} (R{sub 1}=0.0124 and wR{sub 2}=0.0404 for all data). -- graphical abstract: The first satisfying single-crystal structure determination of {pi}-ErBO{sub 3} sheds light on the extensively discussed structure of {pi}-orthoborates. The application of light pressure during the solid state synthesis yielded in high-quality crystals, due to pressure-induced crystallization. Research highlights: {yields} High-quality single crystals of {pi}-ErBO{sub 3} were prepared via high-pressure-induced crystallization. {yields} At least five different space groups for the rare-earth {pi}-orthoborates are reported. {yields} {pi}-ErBO{sub 3} is isotypic to the pseudowollastonite-type CaSiO{sub 3}. {yields} Remaining ambiguities regarding the structure of the rare-earth {pi}-orthoborates are resolved.

  10. TECTONIC VERSUS VOLCANIC ORIGIN OF THE SUMMIT DEPRESSION AT MEDICINE LAKE VOLCANO, CALIFORNIA

    SciTech Connect (OSTI)

    Mark Leon Gwynn

    2010-05-01

    Medicine Lake Volcano is a Quaternary shield volcano located in a tectonically complex and active zone at the transition between the Basin and Range Province and the Cascade Range of the Pacific Province. The volcano is topped by a 7x12 km elliptical depression surrounded by a discontinuous constructional ring of basaltic to rhyolitic lava flows. This thesis explores the possibility that the depression may have formed due to regional extension (rift basin) or dextral shear (pull-apart basin) rather than through caldera collapse and examines the relationship between regional tectonics and localized volcanism. Existing data consisting of temperature and magnetotelluric surveys, alteration mineral studies, and core logging were compiled and supplemented with additional core logging, field observations, and fault striae studies in paleomagnetically oriented core samples. These results were then synthesized with regional fault data from existing maps and databases. Faulting patterns near the caldera, extension directions derived from fault striae P and T axes, and three-dimensional temperature and alteration mineral models are consistent with slip across arcuate ring faults related to magma chamber deflation during flank eruptions and/or a pyroclastic eruption at about 180 ka. These results are not consistent with a rift or pull-apart basin. Limited subsidence can be attributed to the relatively small volume of ash-flow tuff released by the only known major pyroclastic eruption and is inconsistent with the observed topographic relief. The additional relief can be explained by constructional volcanism. Striae from unoriented and oriented core, augmented by striae measurements in outcrop suggest that Walker Lane dextral shear, which can be reasonably projected from the southeast, has probably propagated into the Medicine Lake area. Most volcanic vents across Medicine Lake Volcano strike north-south, suggesting they are controlled by crustal weakness related to Basin and

  11. Tectonic versus volcanic origin of the summit depression at Medicine Lake Volcano, California

    SciTech Connect (OSTI)

    Mark Leon Gwynn

    2010-05-01

    Medicine Lake Volcano is a Quaternary shield volcano located in a tectonically complex and active zone at the transition between the Basin and Range Province and the Cascade Range of the Pacific Province. The volcano is topped by a 7x12 km elliptical depression surrounded by a discontinuous constructional ring of basaltic to rhyolitic lava flows. This thesis explores the possibility that the depression may have formed due to regional extension (rift basin) or dextral shear (pull-apart basin) rather than through caldera collapse and examines the relationship between regional tectonics and localized volcanism. Existing data consisting of temperature and magnetotelluric surveys, alteration mineral studies, and core logging were compiled and supplemented with additional core logging, field observations, and fault striae studies in paleomagnetically oriented core samples. These results were then synthesized with regional fault data from existing maps and databases. Faulting patterns near the caldera, extension directions derived from fault striae P and T axes, and three-dimensional temperature and alteration mineral models are consistent with slip across arcuate ring faults related to magma chamber deflation during flank eruptions and/or a pyroclastic eruption at about 180 ka. These results are not consistent with a rift or pull-apart basin. Limited subsidence can be attributed to the relatively small volume of ash-flow tuff released by the only known major pyroclastic eruption and is inconsistent with the observed topographic relief. The additional relief can be explained by constructional volcanism. Striae from unoriented and oriented core, augmented by striae measurements in outcrop suggest that Walker Lane dextral shear, which can be reasonably projected from the southeast, has probably propagated into the Medicine Lake area. Most volcanic vents across Medicine Lake Volcano strike north-south, suggesting they are controlled by crustal weakness related to Basin and

  12. Slip and Dilation Tendency Analysis of the Patua Geothermal Area

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

    Faulds, James E.

    2013-12-31

    Stress field variation within each focus area was approximated based on regional published data and the world stress database (Hickman et al., 2000; Hickman et al., 1998 Robertson-Tait et al., 2004; Hickman and Davatzes, 2010; Davatzes and Hickman, 2006; Blake and Davatzes 2011; Blake and Davatzes, 2012; Moeck et al., 2010; Moos and Ronne, 2010 and Reinecker et al., 2005) as well as local stress information if applicable. For faults within these focus systems we applied either a normal faulting stress regime where the vertical stress (sv) is larger than the maximum horizontal stress (shmax) which is larger than the minimum horizontal stress (sv>shmax>shmin) or strike-slip faulting stress regime where the maximum horizontal stress (shmax) is larger than the vertical stress (sv) which is larger than the minimum horizontal stress (shmax >sv>shmin) depending on the general tectonic province of the system. Based on visual inspection of the limited stress magnitude data in the Great Basin we used magnitudes such that shmin/shmax = .527 and shmin/sv= .46, which are consistent with complete and partial stress field determinations from Desert Peak, Coso, the Fallon area and Dixie valley (Hickman et al., 2000; Hickman et al., 1998 Robertson-Tait et al., 2004; Hickman and Davatzes, 2011; Davatzes and Hickman, 2006; Blake and Davatzes 2011; Blake and Davatzes, 2012). Slip and dilation tendency analysis for the Patua geothermal system was calculated based on faults mapped in the Hazen Quadrangle (Faulds et al., 2011). Patua lies near the margin between the Basin and Range province, which is characterized by west-northwest directed extension and the Walker Lane province, characterized by west-northwest directed dextral shear. As such, the Patua area likely has been affected by tectonic stress associated with either or both of stress regimes over geologic time. In order to characterize this stress variation we calculated slip tendency at Patua for both normal faulting and strike

  13. STRUCTURAL CONTROLS OF THE EMERSON PASS GEOTHERMAL SYSTEM, NORTHWESTERN NEVADA: CHARACTERIZATION OF A "BLIND" SYSTEM

    SciTech Connect (OSTI)

    Anderson, Ryan B; Faulds, James E

    2012-12-03

    Detailed geologic analyses have elucidated the kinematics, stress state, structural controls, and past surface activity of a blind geothermal system in Emerson Pass on the Pyramid Lake Paiute Reservation, western Nevada. The Emerson Pass area resides near the boundary of the Basin and Range and Walker Lane provinces and at the western edge of a broad left step or relay ramp between the north- to north-northeast-striking, west-dipping, Fox and Lake Range normal faults. The step-over provides a structurally favorable setting for deep circulation of meteoric fluids. Strata in the area are comprised of late Miocene to Pliocene sedimentary rocks and the middle Miocene Pyramid sequence mafic to intermediate volcanic rocks, all overlying Mesozoic metasedimentary and intrusive rocks. A thermal anomaly was discovered in Emerson Pass by use of 2-m temperature surveys deployed within a structurally favorable setting and proximal to surface features indicative of geothermal activity. The 2-m temperature surveys define a north-south elongate thermal anomaly that has a maximum recorded temperature of ~60°C and resides on a north- to north-northeast-striking normal fault. Although the active geothermal system is expressed solely as a soil heat anomaly, late Pleistocene travertine and tufa mounds, chalcedonic silica/calcite veins, and silica cemented Pleistocene lacustrine gravels indicate a robust geothermal system was active at the surface in the recent past. The geothermal system is controlled primarily by the broad step-over between two major range-bounding normal faults. In detail, the system likely results from enhanced permeability generated by the intersection of two oppositely dipping, southward terminating north- to north-northwest-striking (Fox Range fault) and north-northeast-striking normal faults. Structural complexity and spatial heterogeneities of the strain and stress field have developed in the step-over region, but kinematic data suggest a west

  14. Final fate of spherically symmetric gravitational collapse of a dust cloud in Einstein-Gauss-Bonnet gravity

    SciTech Connect (OSTI)

    Maeda, Hideki

    2006-05-15

    We give a model of the higher-dimensional spherically symmetric gravitational collapse of a dust cloud including the perturbative effects of quantum gravity. The n({>=}5)-dimensional action with the Gauss-Bonnet term for gravity is considered and a simple formulation of the basic equations is given for the spacetime M{approx_equal}M{sup 2}xK{sup n-2} with a perfect fluid and a cosmological constant. This is a generalization of the Misner-Sharp formalism of the four-dimensional spherically symmetric spacetime with a perfect fluid in general relativity. The whole picture and the final fate of the gravitational collapse of a dust cloud differ greatly between the cases with n=5 and n{>=}6. There are two families of solutions, which we call plus-branch and the minus-branch solutions. A plus-branch solution can be attached to the outside vacuum region which is asymptotically anti-de Sitter in spite of the absence of a cosmological constant. Bounce inevitably occurs in the plus-branch solution for n{>=}6, and consequently singularities cannot be formed. Since there is no trapped surface in the plus-branch solution, the singularity formed in the case of n=5 must be naked. On the other hand, a minus-branch solution can be attached to the outside asymptotically flat vacuum region. We show that naked singularities are massless for n{>=}6, while massive naked singularities are possible for n=5. In the homogeneous collapse represented by the flat Friedmann-Robertson-Walker solution, the singularity formed is spacelike for n{>=}6, while it is ingoing-null for n=5. In the inhomogeneous collapse with smooth initial data, the strong cosmic censorship hypothesis holds for n{>=}10 and for n=9 depending on the parameters in the initial data, while a naked singularity is always formed for 5{<=}n{<=}8. These naked singularities can be globally naked when the initial surface radius of the dust cloud is fine-tuned, and then the weak cosmic censorship hypothesis is violated.

  15. Gauge fields and ghosts in Rindler space

    SciTech Connect (OSTI)

    Zhitnitsky, Ariel R.

    2010-11-15

    We consider a two-dimensional Maxwell system defined on the Rindler space with metric ds{sup 2}=exp(2a{xi}){center_dot}(d{eta}{sup 2}-d{xi}{sup 2}) with the goal to study the dynamics of the ghosts. We find an extra contribution to the vacuum energy in comparison with Minkowski space-time with metric ds{sup 2}=dt{sup 2}-dx{sup 2}. This extra contribution can be traced to the unphysical degrees of freedom (in Minkowski space). The technical reason for this effect to occur is the property of Bogolubov's coefficients which mix the positive- and negative-frequency modes. The corresponding mixture cannot be avoided because the projections to positive-frequency modes with respect to Minkowski time t and positive-frequency modes with respect to the Rindler observer's proper time {eta} are not equivalent. The exact cancellation of unphysical degrees of freedom which is maintained in Minkowski space cannot hold in the Rindler space. In the Becchi-Rouet-Stora-Tyutin (BRST) approach this effect manifests itself as the presence of BRST charge density in L and R parts. An inertial observer in Minkowski vacuum |0> observes a universe with no net BRST charge only as a result of cancellation between the two. However, the Rindler observers who do not ever have access to the entire space-time would see a net BRST charge. In this respect the effect resembles the Unruh effect. The effect is infrared (IR) in nature, and sensitive to the horizon and/or boundaries. We interpret the extra energy as the formation of the ''ghost condensate'' when the ghost degrees of freedom cannot propagate, but nevertheless do contribute to the vacuum energy. Exact computations in this simple two-dimensional model support the claim made in a previous paper [F. R. Urban and A. R. Zhitnitsky, Nucl. Phys. B835, 135 (2010).] that the ghost contribution might be responsible for the observed dark energy in a four-dimensional Friedmann-Lemaitre-Robertson-Walker universe.

  16. Assessment of Nonnative Invasive Plants in the DOE Oak Ridge National Environmental Research Park

    SciTech Connect (OSTI)

    Drake, S.J.

    2002-11-05

    The Department of Energy (DOE) National Environmental Research Park at Oak Ridge, Tennessee, is composed of second-growth forest stands characteristic of much of the eastern deciduous forest of the Ridge and Valley Province of Tennessee. Human use of natural ecosystems in this region has facilitated the establishment of at least 167 nonnative, invasive plant species on the Research Park. Our objective was to assess the distribution, abundance, impact, and potential for control of the 18 most abundant invasive species on the Research Park. In 2000, field surveys were conducted of 16 management areas on the Research Park (14 Natural Areas, 1 Reference Area, and Walker Branch Watershed) and the Research Park as a whole to acquire qualitative and quantitative data on the distribution and abundance of these taxa. Data from the surveys were used to rank the relative importance of these species using the ''Alien Plant Ranking System, Version 5.1'' developed by the U.S. Geological Survey. Microstegium (Microstegium vimineum) was ranked highest, or most problematic, for the entire Research Park because of its potential impact on natural systems, its tendency to become a management problem, and how difficult it is to control. Microstegium was present in 12 of the 16 individual sites surveyed; when present, it consistently ranked as the most problematic invasive species, particularly in terms of its potential impact on natural systems. Japanese honeysuckle (Lonicera japonica) and Chinese privet (Ligustrum sinense) were the second- and third-most problematic plant species on the Research Park; these two species were present in 12 and 9 of the 16 sites surveyed, respectively, and often ranked second- or third-most problematic. Other nonnative, invasive species, in decreasing rank order, included kudzu (Pueraria montma), multiflora rose (Rosa multiflora), Chinese lespedeza (Lespedeza cuneara), and other species representing a variety of life forms and growth forms. Results of

  17. Slip and Dilation Tendency Analysis of the Patua Geothermal Area

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

    Faulds, James E.

    2013-12-31

    , 2010; Davatzes and Hickman, 2006; Blake and Davatzes 2011; Blake and Davatzes, 2012; Moeck et al., 2010; Moos and Ronne, 2010 and Reinecker et al., 2005) as well as local stress information if applicable. For faults within these focus systems we applied either a normal faulting stress regime where the vertical stress (sv) is larger than the maximum horizontal stress (shmax) which is larger than the minimum horizontal stress (sv>shmax>shmin) or strike-slip faulting stress regime where the maximum horizontal stress (shmax) is larger than the vertical stress (sv) which is larger than the minimum horizontal stress (shmax >sv>shmin) depending on the general tectonic province of the system. Based on visual inspection of the limited stress magnitude data in the Great Basin we used magnitudes such that shmin/shmax = .527 and shmin/sv= .46, which are consistent with complete and partial stress field determinations from Desert Peak, Coso, the Fallon area and Dixie valley (Hickman et al., 2000; Hickman et al., 1998 Robertson-Tait et al., 2004; Hickman and Davatzes, 2011; Davatzes and Hickman, 2006; Blake and Davatzes 2011; Blake and Davatzes, 2012). Slip and dilation tendency analysis for the Patua geothermal system was calculated based on faults mapped in the Hazen Quadrangle (Faulds et al., 2011). Patua lies near the margin between the Basin and Range province, which is characterized by west-northwest directed extension and the Walker Lane province, characterized by west-northwest directed dextral shear. As such, the Patua area likely has been affected by tectonic stress associated with either or both of stress regimes over geologic time. In order to characterize this stress variation we calculated slip tendency at Patua for both normal faulting and strike slip faulting stress regimes. Based on examination of regional and local stress data (as explained above) we applied at shmin direction of 105 to Patua. Whether the vertical stress (sv) magnitude is larger than ...