National Library of Energy BETA

Sample records for alameda-contra coasta transit

  1. Alameda-Contra Costa Transit District (AC Transit) Fuel Cell...

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

    Alameda-Contra Costa Transit district for three protoype fuel cell buses and six diesel buses operating from the same location. 43545-2.pdf More Documents & Publications...

  2. Alameda-Contra Costa Transit District (AC Transit) Fuel Cell Transit Buses: Third Evaluation Report and Appendices

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2008-07-01

    This report describes operations at Alameda-Contra Costa Transit district for three protoype fuel cell buses and six diesel buses operating from the same location.

  3. Alameda-Contra Costa Transit District (AC Transit) Fuel Cell...

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

    provides an evaluation of three prototype fuel cell-powered transit buses operating at AC Transit in Oakland, California, and six baseline diesel buses similar in design to the...

  4. National Fuel Cell Bus Program: Accelerated Testing Evaluation Report #2, Alameda-Contra Costa Transit District (AC Transit) and Appendices

    SciTech Connect (OSTI)

    Eudy, L.; Chandler, K.

    2010-06-01

    This is an evaluation of hydrogen fuel cell transit buses operating at AC Transit in revenue service since March 20, 2006, comparing similar diesel buses operating from the same depot. It covers November 2007 through February 2010. Results include implementation experience, fueling station operation, evaluation results at AC Transit (bus usage, availability, fuel economy, maintenance costs, and road calls), and a summary of achievements and challenges encountered during the demonstration.

  5. Alameda-Contra Costa Transit District (AC Transit) Fuel Cell...

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

    and Air Conditioning (HVAC) * Lighting * Air System, General * Axles, Wheels, and Drive Shaft * Tires The systems with the highest percentage of maintenance costs for the fuel cell...

  6. Fuel Cell Buses in U.S. Transit Fleets: Current Status 2008

    SciTech Connect (OSTI)

    Eudy, L.; Chandler, K.; Gikakis, C.

    2008-12-01

    This report provides results from fuel cell bus evaluations at Alameda-Contra Costa Transit District, SunLine Transit Agency, and Santa Clara Valley Transportation Authority.

  7. Alameda-Contra Costa Transit District (AC Transit) Fuel Cell Transit Buses:

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based Fuels Research at NRELDepartment ofEnergyMethane Recovery

  8. Alameda-Contra Costa Transit District (AC Transit) Fuel Cell Transit Buses:

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based Fuels Research at NRELDepartment ofEnergyMethane RecoveryThird

  9. Alameda-Contra Costa Transit District (AC Transit) Fuel Cell Transit Buses:

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based Fuels Research at NRELDepartment ofEnergyMethane RecoveryThirdThird

  10. Alameda-Contra Costa Transit District Fuel Cell Transit Buses: Evalluation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based Fuels Research at NRELDepartment ofEnergyMethane

  11. Fuel Cell Buses in U.S. Transit Fleets: Current Status 2015

    SciTech Connect (OSTI)

    Eudy, Leslie; Post, Matthew; Gikakis, Christina

    2015-12-11

    This report, published annually, summarizes the progress of fuel cell electric bus (FCEB) development in the United States and discusses the achievements and challenges of introducing fuel cell propulsion in transit. Various stakeholders, including FCEB developers, transit agencies, and system integrators, have expressed the value of this annual status report, which provides a summary of results from evaluations performed by the National Renewable Energy Laboratory. The annual status report tracks the progress of the FCEB industry toward meeting technical targets, documents the lessons learned, and discusses the path forward for commercial viability of fuel cell technology for transit buses. The 2015 summary results primarily focus on the most recent year for each demonstration, from August 2014 through July 2015. The results for these buses account for more than 1,045,000 miles traveled and 83,000 hours of fuel cell power system operation. The primary results presented in the report are from two demonstrations of fuel-cell-dominant bus designs: the Zero Emission Bay Area Demonstration Group led by Alameda-Contra Costa Transit District (AC Transit) in California and the American Fuel Cell Bus Project at SunLine Transit Agency in California.

  12. Zero Emission Bay Area (ZEBA) Fuel Cell Bus Demonstration Results. Fourth Report

    SciTech Connect (OSTI)

    Eudy, Leslie; Post, Matthew

    2015-07-02

    This report presents results of a demonstration of fuel cell electric buses (FCEB) operating in Oakland, California. Alameda-Contra Costa Transit District (AC Transit) leads the Zero Emission Bay Area (ZEBA) demonstration, which includes 12 advanced-design fuel cell buses and two hydrogen fueling stations. The FCEBs in service at AC Transit are 40-foot, low-floor buses built by Van Hool with a hybrid electric propulsion system that includes a US Hybrid fuel cell power system and EnerDel lithium-based energy storage system. The buses began revenue service in May 2010.

  13. EIS-0323: EPA Notice of Availability of the Final Environmental Impact Statement

    Broader source: Energy.gov [DOE]

    Sacramento Area Voltage Support Project, System Reliability and Voltage Support Improvements, Sierra Nevada Region, Alameda, Contra Costa, Placer, Sacramento, San Joaquin and Sutter Counties, CA

  14. Phase Transitions

    E-Print Network [OSTI]

    Michael Creutz

    1997-08-25

    This is a set of notes on phase transitions and critical phenomena prepared to accompany my lectures for the RHIC '97 summer school, held at Brookhaven from July 6 to 16, 1997.

  15. Connecticut Transit (CTTRANSIT) Fuel Cell Transit Bus: Preliminary...

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

    Connecticut Transit (CTTRANSIT) Fuel Cell Transit Bus: Preliminary Evaluation Results Connecticut Transit (CTTRANSIT) Fuel Cell Transit Bus: Preliminary Evaluation Results This...

  16. Gas turbine combustor transition

    DOE Patents [OSTI]

    Coslow, Billy Joe (Winter Park, FL); Whidden, Graydon Lane (Great Blue, CT)

    1999-01-01

    A method of converting a steam cooled transition to an air cooled transition in a gas turbine having a compressor in fluid communication with a combustor, a turbine section in fluid communication with the combustor, the transition disposed in a combustor shell and having a cooling circuit connecting a steam outlet and a steam inlet and wherein hot gas flows from the combustor through the transition and to the turbine section, includes forming an air outlet in the transition in fluid communication with the cooling circuit and providing for an air inlet in the transition in fluid communication with the cooling circuit.

  17. Gas turbine combustor transition

    DOE Patents [OSTI]

    Coslow, B.J.; Whidden, G.L.

    1999-05-25

    A method is described for converting a steam cooled transition to an air cooled transition in a gas turbine having a compressor in fluid communication with a combustor, a turbine section in fluid communication with the combustor, the transition disposed in a combustor shell and having a cooling circuit connecting a steam outlet and a steam inlet and wherein hot gas flows from the combustor through the transition and to the turbine section, includes forming an air outlet in the transition in fluid communication with the cooling circuit and providing for an air inlet in the transition in fluid communication with the cooling circuit. 7 figs.

  18. Asynchronous-Transition HMM 

    E-Print Network [OSTI]

    Matsuda, Shigeki; Nakai, Mitsuru; Shimodaira, Hiroshi; Sagayama, Shigeki

    We propose a new class of hidden Markov model (HMM) called asynchronous-transition HMM (AT-HMM). Opposed to conventional HMMs where hidden state transition occurs simultaneously to all features, the new class of HMM allows ...

  19. Transit Users Group Supports Transit Agencies with Natural Gas Buses

    SciTech Connect (OSTI)

    Not Available

    2002-04-01

    Fact sheet describes the benefits of the Transit Users Group, which supports transit groups with compressed natural gas (CNG) buses.

  20. SEP Program Transition Tables

    Broader source: Energy.gov [DOE]

    The Program Transition Tables provide information concerning the level of effort required to move from a traditional, industrial incentive program to Strategic Energy Management, ISO 50001, or SEP.

  1. Hydrogen Transition Infrastructure Analysis

    SciTech Connect (OSTI)

    Melendez, M.; Milbrandt, A.

    2005-05-01

    Presentation for the 2005 U.S. Department of Energy Hydrogen Program review analyzes the hydrogen infrastructure needed to accommodate a transitional hydrogen fuel cell vehicle demand.

  2. King County Metro Transit

    SciTech Connect (OSTI)

    Not Available

    2004-12-01

    Fact sheet describes the National Renewable Energy Laboratory's evaluation of King County Metro's articulated hybrid electric transit buses with Allison electric drives.

  3. Hydrogen Technology and Energy Curriculum (HyTEC)

    SciTech Connect (OSTI)

    Nagle, Barbara

    2013-02-28

    The Lawrence Hall of Science of the University of California, Berkeley has collaborated with scientists and engineers, a local transit agency, school districts, and a commercial curriculum publisher to develop, field-test nationally, and publish a two-week curriculum module on hydrogen and fuel cells for high school science. Key partners in this project are the Schatz Energy Research Center (SERC) of Humboldt State University, the Alameda-Contra Costa Transit District (AC Transit), FilmSight Productions, Lab-Aids, Inc., and 32 teachers and 2,370 students in field-test classrooms in California, Connecticut, Ohio, New York, South Carolina, and Washington. Field-test teachers received two to three days of professional development before teaching the curriculum and providing feedback used for revision of the curriculum. The curriculum, titled Investigating Alternative Energy: Hydrogen and Fuel Cells and published by Lab-Aids, Inc., includes a teachers guide (with lesson plans, resources, and student handout pages), two interactive computer animations, a video, a website, and a laboratory materials kit. The project has been disseminated to over 950 teachers through awareness workshops at state, regional, and national science teacher conferences.

  4. Noise-induced transitions vs. noise-induced phase transitions

    E-Print Network [OSTI]

    Toral, Raúl

    Noise-induced transitions vs. noise-induced phase transitions Raul Toral IFISC (Instituto de Física the field of noise-induced phase transitions, emphasizing the main differences with the phase-induced transitions and showing that they appear in different systems. I will show that a noise-induced transition can

  5. Energy stories, equations and transition

    E-Print Network [OSTI]

    Ernst, Damien

    Energy stories, equations and transition Une histoire d'énergie: équations et transition% - Transition #12;ERoEI · ERoEI for « Energy Sustainable Energy April 28th, 2015 Raphael Fonteneau, University of Liège, Belgium @R_Fonteneau #12;Energy

  6. Certificate in Transit Management and

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    , and perform minor maintenance and staff responsibilities. UMass Transit has been a fare free public transit Intro to Transportation Systems FINOPMGT 341 Logistics & Transportation Functions FINOPMGT 347 Intro

  7. Energy Transition Initiative

    Office of Energy Efficiency and Renewable Energy (EERE)

    Through the Energy Transition Initiative (ETI), the U.S. Department of Energy and its partners work with government entities and other stakeholders to establish a long-term energy vision and successfully implement energy efficiency and renewable energy solutions.

  8. site_transition.cdr

    Office of Environmental Management (EM)

    OF This fact sheet explains the process for transferring a site to the U.S. Department of Energy Office of Legacy Management. Site Transition Process Upon Cleanup Completion...

  9. Sudden gravitational transition

    SciTech Connect (OSTI)

    Caldwell, Robert R. [Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory, Hanover, New Hampshire 03755 (United States); Komp, William [Physics Department, University of Louisville, 102 Natural Sciences, Louisville, Kentucky 40292 (United States); Parker, Leonard [Physics Department, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201 (United States); Vanzella, Daniel A. T. [Instituto de Fisica de Sao Carlos, Universidade de Sao Paulo (IFSC-USP), Av. Trabalhador Sao-carlense, 400 Cx. Postal 369 - CEP 13560-970, Sao Carlos, Sao Paulo (Brazil)

    2006-01-15

    We investigate the properties of a cosmological scenario which undergoes a gravitational phase transition at late times. In this scenario, the Universe evolves according to general relativity in the standard, hot big bang picture until a redshift z < or approx. 1. Nonperturbative phenomena associated with a minimally-coupled scalar field catalyzes a transition, whereby an order parameter consisting of curvature quantities such as R{sup 2}, R{sub ab}R{sup ab}, R{sub abcd}R{sup abcd} acquires a constant expectation value. The ensuing cosmic acceleration appears driven by a dark-energy component with an equation-of-state w<-1. We evaluate the constraints from type 1a supernovae, the cosmic microwave background, and other cosmological observations. We find that a range of models making a sharp transition to cosmic acceleration are consistent with observations.

  10. Electroweak phase transitions

    SciTech Connect (OSTI)

    Anderson, G.W.

    1991-09-16

    An analytic treatment of the one Higgs doublet, electroweak phase transition is given. The phase transition is first order, occurs by the nucleation of thin walled bubbles and completes at a temperature where the order parameter, {l_angle}{phi}{r_angle}{sub T} is significantly smaller than it is when the origin becomes absolutely unstable. The rate of anomalous baryon number violation is an exponentially function of {l_angle}{phi}{r_angle}{sub T}. In very minimal extensions of the standard model it is quite easy to increase {l_angle}{phi}{r_angle}{sub T} so that anomalous baryon number violation is suppressed after completion of the phase transition. Hence baryogenesis at the electroweak phase transition is tenable in minimal of the standard model. In some cases additional phase transitions are possible. For a light Higgs boson, when the top quark mass is sufficiently large, the state where the Higgs field has a vacuum expectation value {l_angle}{phi}{r_angle} = 246 GeV is not the true minimum of the Higgs potential. When this is the case, and when the top quark mass exceeds some critical value, thermal fluctuations in the early universe would have rendered the state {l_angle}{phi}{r_angle} = 246 GeV unstable. The requirement that the state {l_angle}{phi}{r_angle} = 246 GeV is sufficiently long lived constrains the masses of the Higgs boson and the top quark. Finally, we consider whether local phase transitions can be induced by heavy particles which act as seeds for deformations in the scalar field.

  11. Electroweak phase transitions

    SciTech Connect (OSTI)

    Anderson, G.W.

    1991-09-16

    An analytic treatment of the one Higgs doublet, electroweak phase transition is given. The phase transition is first order, occurs by the nucleation of thin walled bubbles and completes at a temperature where the order parameter, {l angle}{phi}{r angle}{sub T} is significantly smaller than it is when the origin becomes absolutely unstable. The rate of anomalous baryon number violation is an exponentially function of {l angle}{phi}{r angle}{sub T}. In very minimal extensions of the standard model it is quite easy to increase {l angle}{phi}{r angle}{sub T} so that anomalous baryon number violation is suppressed after completion of the phase transition. Hence baryogenesis at the electroweak phase transition is tenable in minimal of the standard model. In some cases additional phase transitions are possible. For a light Higgs boson, when the top quark mass is sufficiently large, the state where the Higgs field has a vacuum expectation value {l angle}{phi}{r angle} = 246 GeV is not the true minimum of the Higgs potential. When this is the case, and when the top quark mass exceeds some critical value, thermal fluctuations in the early universe would have rendered the state {l angle}{phi}{r angle} = 246 GeV unstable. The requirement that the state {l angle}{phi}{r angle} = 246 GeV is sufficiently long lived constrains the masses of the Higgs boson and the top quark. Finally, we consider whether local phase transitions can be induced by heavy particles which act as seeds for deformations in the scalar field.

  12. Variational transition state theory

    SciTech Connect (OSTI)

    Truhlar, D.G. [Univ. of Minnesota, Minneapolis (United States)

    1993-12-01

    This research program involves the development of variational transition state theory (VTST) and semiclassical tunneling methods for the calculation of gas-phase reaction rates and selected applications. The applications are selected for their fundamental interest and/or their relevance to combustion.

  13. Transition Implementation Guide

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2001-04-24

    This Guide was prepared to aid in the development, planning, and implementation of requirements and activities during the transition phase at Department of Energy (DOE) facilities that have been declared or are forecast to become excess to any future mission requirements.

  14. Transition temperature in QCD

    SciTech Connect (OSTI)

    Cheng, M.; Christ, N. H.; Mawhinney, R. D. [Physics Department, Columbia University, New York, New York 10027 (United States); Datta, S.; Jung, C.; Schmidt, C.; Umeda, T. [Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States); Heide, J. van der; Kaczmarek, O.; Laermann, E.; Miao, C. [Fakultaet fuer Physik, Universitaet Bielefeld, D-33615 Bielefeld (Germany); Karsch, F. [Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States); Fakultaet fuer Physik, Universitaet Bielefeld, D-33615 Bielefeld (Germany); Petreczky, P. [Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States); RIKEN-BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973 (United States); Petrov, K. [Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen (Denmark)

    2006-09-01

    We present a detailed calculation of the transition temperature in QCD with two light and one heavier (strange) quark mass on lattices with temporal extent N{sub {tau}}=4 and 6. Calculations with improved staggered fermions have been performed for various light to strange quark mass ratios in the range, 0.05{<=}m-circumflex{sub l}/m-circumflex{sub s}{<=}0.5, and with a strange quark mass fixed close to its physical value. From a combined extrapolation to the chiral (m-circumflex{sub l}{yields}0) and continuum (aT{identical_to}1/N{sub {tau}}{yields}0) limits we find for the transition temperature at the physical point T{sub c}r{sub 0}=0.457(7) where the scale is set by the Sommer-scale parameter r{sub 0} defined as the distance in the static quark potential at which the slope takes on the value (dV{sub qq}(r)/dr){sub r=r{sub 0}}=1.65/r{sub 0}{sup 2}. Using the currently best known value for r{sub 0} this translates to a transition temperature T{sub c}=192(7)(4) MeV. The transition temperature in the chiral limit is about 3% smaller. We discuss current ambiguities in the determination of T{sub c} in physical units and also comment on the universal scaling behavior of thermodynamic quantities in the chiral limit.

  15. Certificate in Transit Management and

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    , and perform minor maintenance and staff responsibilities. UMass Transit has been a fare free public transit operation, and management. CTTransit CEE 310 Intro to Transportation Systems FINOPMGT 341 Logistics

  16. Precision photometry for planetary transits

    E-Print Network [OSTI]

    Frederic Pont; Claire Moutou

    2007-02-06

    We review the state of the art in follow-up photometry for planetary transit searches. Three topics are discussed: (1) Photometric monitoring of planets discovered by radial velocity to detect possible transits (2) Follow-up photometry of candidates from photometric transit searches to weed out eclipsing binaries and false positives (3) High-precision lightcurves of known transiting planets to increase the accuracy on the planet parameters.

  17. Refrigerants in Transition 

    E-Print Network [OSTI]

    Stouppe, D. E.

    1991-01-01

    . 27-30. 7. Hayes, Floyd C., "Centrifugal\\~ater Chillers," CFCs: Today's Options Tomorrow's Solutions, ASHRAE Publication, Atlanta, GA, 1990, pp. 71-73. 8. Lorenz, Michael R., "CFCs: The Designer's Dilemma," Heating/Piping/Air Conditioning, April 1990... IN TRANSITION DAVID E. STOUPPE, P.E. Senior Engineer The Hartford Steam Boiler Inspection and Insurance Company Hartford,. Connecticut ABSTRACT The massive growth of air conditioning and refrigeration has been a direct result of the development of a...

  18. Analytic equivalence of geometric transitions

    E-Print Network [OSTI]

    Michele Rossi

    2014-08-28

    In this paper \\emph{analytic equivalence} of geometric transition is defined in such a way that equivalence classes of geometric transitions turn out to be the \\emph{arrows} of the \\cy web. Then it seems natural and useful, both from the mathematical and physical point of view, look for privileged arrows' representatives, called \\emph{canonical models}, laying the foundations of an \\emph{analytic} classification of geometric transitions. At this purpose a numerical invariant, called \\emph{bi--degree}, summarizing the topological, geometric and physical changing properties of a geometric transition, is defined for a large class of geometric transitions.

  19. Superradiance Transition in Graphene

    E-Print Network [OSTI]

    Alexander I. Nesterov; Fermín Aceves de la Cruz; Valeriy A. Luchnikov; Gennady P. Berman

    2015-06-12

    We study theoretically and numerically the conditions required for the appearance of a superradiance transition in graphene. The electron properties of graphene are described in the single $p_z$-orbital tight-binding approximation, in which the model is reduced to the effective two-level pseudo-spin $1/2$ system. For each level we introduce the electron transfer rate of escape into a continuum. We demonstrate that, under some conditions, the superradiance experiences the maximal quantum coherent escape to the continuum.

  20. Transition Metal Switchable Mirror

    ScienceCinema (OSTI)

    None

    2010-01-08

    The switchable-mirrors technology was developed by Tom Richardson and Jonathan Slack of Berkeley Lab's Environmental Energy Technologies Division. By using transition metals rather than the rare earth metals used in the first metal-hydride switchable mirrors, Richardson and Slack were able to lower the cost and simplify the manufacturing process. Energy performance is improved as well, because the new windows can reflect or transmit both visible and infrared light. Besides windows for offices and homes, possible applications include automobile sunroofs, signs and displays, aircraft windows, and spacecraft.

  1. Transition Metal Switchable Mirror

    ScienceCinema (OSTI)

    None

    2013-05-29

    The switchable-mirrors technology was developed by Tom Richardson and Jonathan Slack of Berkeley Lab's Environmental Energy Technologies Division. By using transition metals rather than the rare earth metals used in the first metal-hydride switchable mirrors, Richardson and Slack were able to lower the cost and simplify the manufacturing process. Energy performance is improved as well, because the new windows can reflect or transmit both visible and infrared light. Besides windows for offices and homes, possible applications include automobile sunroofs, signs and displays, aircraft windows, and spacecraft. More information at: http://windows.lbl.gov/materials/chromogenics/default.htm

  2. Transition Metal Switchable Mirror

    SciTech Connect (OSTI)

    2009-08-21

    The switchable-mirrors technology was developed by Tom Richardson and Jonathan Slack of Berkeley Lab's Environmental Energy Technologies Division. By using transition metals rather than the rare earth metals used in the first metal-hydride switchable mirrors, Richardson and Slack were able to lower the cost and simplify the manufacturing process. Energy performance is improved as well, because the new windows can reflect or transmit both visible and infrared light. Besides windows for offices and homes, possible applications include automobile sunroofs, signs and displays, aircraft windows, and spacecraft.

  3. Transition Metal Switchable Mirror

    SciTech Connect (OSTI)

    None

    2009-01-01

    The switchable-mirrors technology was developed by Tom Richardson and Jonathan Slack of Berkeley Lab's Environmental Energy Technologies Division. By using transition metals rather than the rare earth metals used in the first metal-hydride switchable mirrors, Richardson and Slack were able to lower the cost and simplify the manufacturing process. Energy performance is improved as well, because the new windows can reflect or transmit both visible and infrared light. Besides windows for offices and homes, possible applications include automobile sunroofs, signs and displays, aircraft windows, and spacecraft. More information at: http://windows.lbl.gov/materials/chromogenics/default.htm

  4. 309 Building transition plan

    SciTech Connect (OSTI)

    Graves, C.E.

    1994-08-31

    The preparation for decontamination and decommissioning (transition) of the 309 Building is projected to be completed by the end of the fiscal year (FY) 1998. The major stabilization and decontamination efforts include the Plutonium Recycle Test Reactor (PRTR), fuel storage and transfer pits, Transfer Waste (TW) tanks and the Ion Exchange Vaults. In addition to stabilizing contaminated areas, equipment, components, records, waste products, etc., will be dispositioned. All nonessential systems, i.e., heating, ventilation, and air conditioning (HVAC), electrical, monitoring, fluids, etc., will be shut down and drained/de-energized. This will allow securing of the process, laboratory, and office areas of the facility. After that, the facility will be operated at a level commensurate with its surveillance needs while awaiting D&D. The implementation costs for FY 1995 through FY 1998 for the transition activities are estimated to be $1,070K, $2,115K, $2,939K, and $4,762K, respectively. Costs include an assumed company overhead of 20% and a 30% out year contingency.

  5. Connecticut Transit (CTTRANSIT) Fuel Cell Transit Bus: Second...

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

    Connecticut Transit (CTTRANSIT) in Hartford for one prototype fuel cell bus and three new diesel buses operating from the same location. 45670-2.pdf More Documents & Publications...

  6. Connecticut Transit (CTTRANSIT) Fuel Cell Transit Bus: Third...

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

    describes operations at Connecticut Transit (CTTRANSIT) in Hartford for one prototype fuel cell bus and three new diesel buses operating from the same location. The prototype...

  7. Smarter Parking at Transit Stations

    E-Print Network [OSTI]

    Shaheen, Susan; Kemmerer, Charlene

    2007-01-01

    The High Cost of Free Parking (Chicago, Illinois: Americanand Amanda Eaken. Smart Parking Management Field Test: A BayTransit (BART) District Parking Demonstration—Phase One

  8. Planetary Transits of TRES-1

    E-Print Network [OSTI]

    A. Price; R. Bissinger; G. Laughlin; B. Gary; T. Vanmunster; A. Henden; D. Starkey; D. Kaiser; J. Holtzman; L. Marschall; T. Michalik; T. Wellington; P. Paakonen; Z. S. Kereszty; R. Durkee; K. Richardson; R. Leadbeater; T. Castellano

    2004-12-17

    Observations of TRES-1b transits made during the late summer and fall 2004 observing season reveal a statistically significant but low amplitude brightening event during egress.

  9. Washington Metropolitan Area Transit Authority: Compressed Natural Gas Transit Bus Evaluation

    SciTech Connect (OSTI)

    Chandler, K.; Eberts, E.; Melendez, M.

    2006-04-01

    Evaluates compressed natural gas (CNG) powered transit buses at Washington Metropolitan Area Transit Authority (WMATA), providing a comparison between them and standard diesel transit buses.

  10. Multiobjective Optimization and Phase Transitions

    E-Print Network [OSTI]

    Seoane, Luís F

    2015-01-01

    Many complex systems obey to optimality conditions that are usually not simple. Conflicting traits often interact making a Multi Objective Optimization (MOO) approach necessary. Recent MOO research on complex systems report about the Pareto front (optimal designs implementing the best trade-off) in a qualitative manner. Meanwhile, research on traditional Simple Objective Optimization (SOO) often finds phase transitions and critical points. We summarize a robust framework that accounts for phase transitions located through SOO techniques and indicates what MOO features resolutely lead to phase transitions. These appear determined by the shape of the Pareto front, which at the same time is deeply related to the thermodynamic Gibbs surface. Indeed, thermodynamics can be written as an MOO from where its phase transitions can be parsimoniously derived; suggesting that the similarities between transitions in MOO-SOO and Statistical Mechanics go beyond mere coincidence.

  11. Spinfluid Phase Transitions

    E-Print Network [OSTI]

    Marcus S. Cohen

    2009-07-10

    We start with the spinfluid: a nearly-homogeneous, 8-spinor medium, with small local eddies and twists. As it expends, these seed a raft of intersecting codimension-J singularities: a spinfoam. As this expands, the energy trapped in each (4-J) brane varies as the Jth power of the scale factor. Summing on J=(0,1,2,3,4) creates a quartic dilation potential with either 1 or 2 minima: preferred length and mass scales. The spinfoam expands forever with 1 minimum, but recontracts with 2. To quantize it, we take a canonical ensemble of spinfoams, immersed in a heat bath of vacuum spinors, whose microstates vastly outnumber the matter states. It's evolution is governed by a free energy which admits phase transitions at two critical scale, separated by a triple point.Their critical droplets correspond to the varieties of leptons and hadrons.We identify the first as inflation, the second as baryogenesis; and the heat bath of vacuum spinors as dark energy.

  12. SunLine Transit Agency Fuel Cell Transit Bus: Fourth Evaluation...

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

    44646-2.pdf More Documents & Publications SunLine Transit Agency, Hydrogen-Powered Transit Buses: Preliminary Evaluation Results SunLine Transit Agency Fuel Cell Transit Bus:...

  13. Photometry and transit-timing analysis for eleven transiting exoplanets

    E-Print Network [OSTI]

    De Kleer, Katherine Rebecca

    2009-01-01

    This thesis presents time-series photometry of transits of 11 different extrasolar planets. Observations were conducted with the Fred L. Whipple Observatory 1.2m telescope and the Wise Observatory im telescope, in standard ...

  14. Power Marketing Administrations Leading the Nation's Transition...

    Energy Savers [EERE]

    Leading the Nation's Transition to a 21st Century Electric Grid Power Marketing Administrations Leading the Nation's Transition to a 21st Century Electric Grid November 19, 2012 -...

  15. Feeding the Transition Dairy Cow 

    E-Print Network [OSTI]

    Stokes, Sandra R.

    1999-09-20

    Proper nutrition management during a cow's transition period (from the last 3 weeks of gestation through the first 2 weeks of lactation), is critical to successful lactation. This publication gives details for nutrition management. Two charts list...

  16. Hubble's View of Transiting Planets

    E-Print Network [OSTI]

    David Charbonneau

    2004-10-27

    The Hubble Space Telescope is uniquely able to study planets that are observed to transit their parent stars. The extremely stable platform afforded by an orbiting spacecraft, free from the contaminating effects of the Earth's atmosphere, enables HST to conduct ultra-high precision photometry and spectroscopy of known transiting extrasolar planet systems. Among HST's list of successful observations of the first such system, HD 209458, are (1) the first detection of the atmosphere of an extrasolar planet, (2) the determination that gas is escaping from the planet, and (3) a search for Earth-sized satellites and circumplanetary rings. Numerous wide-field, ground-based transit surveys are poised to uncover a gaggle of new worlds for which HST may undertake similar studies, such as the newly-discovered planet TrES-1. With regard to the future of Hubble, it must be noted that it is the only observatory in existence capable of confirming transits of Earth-like planets that may be detected by NASA's Kepler mission. Kepler could reveal Earth-like transits by the year 2010, but without a servicing mission it is very unlikely that HST would still be in operation.

  17. Adhesion Transition of Flexible Sheets

    E-Print Network [OSTI]

    Arthur A. Evans; Eric Lauga

    2009-05-31

    Intermolecular forces are known to precipitate adhesion events between solid bodies. Inspired by a macro-scale experiment showing the hysteretic adhesion of a piece of flexible tape over a plastic substrate, we develop here a model of far-field dry adhesion between two flexible sheets interacting via a power-law potential. We show that phase transitions from unadhered to adhered states occur as dictated by a dimensionless bending parameter representing the ratio of interaction strength to bending stiffness. The order of the adhesion transitions, as well as their hysteretic nature, is shown to depend on the form of the interaction potential between the flexible sheets. When three or more sheets interact, additional geometrical considerations determine the hierarchical or sequential nature of the adhesion transitions.

  18. Comparative Habitability of Transiting Exoplanets

    E-Print Network [OSTI]

    Barnes, Rory; Evans, Nicole

    2015-01-01

    Exoplanet habitability is traditionally assessed by comparing a planet's semi-major axis to the location of its host star's "habitable zone," the shell around a star for which Earth-like planets can possess liquid surface water. The Kepler space telescope has discovered numerous planet candidates near the habitable zone, and many more are expected from missions such as K2, TESS and PLATO. These candidates often require significant follow-up observations for validation, so prioritizing planets for habitability from transit data has become an important aspect of the search for life in the universe. We propose a method to compare transiting planets for their potential to support life based on transit data, stellar properties and previously reported limits on planetary emitted flux. For a planet in radiative equilibrium, the emitted flux increases with eccentricity, but decreases with albedo. As these parameters are often unconstrained, there is an "eccentricity-albedo degeneracy" for the habitability of transiti...

  19. Transit Lightcurve Signatures of Artificial Objects

    E-Print Network [OSTI]

    Luc Arnold

    2005-03-27

    The forthcoming space missions, able to detect Earth-like planets by the transit method, will a fortiori also be able to detect the transit of artificial planet-size objects. Multiple artificial objects would produce lightcurves easily distinguishable from natural transits. If only one artificial object transits, detecting its artificial nature becomes more difficult. We discuss the case of three different objects (triangle, 2-screen, louver-like 6-screen) and show that they have a transit lightcurve distinguishable from the transit of natural planets, either spherical or oblate, although an ambiguity with the transit of a ringed planet exists in some cases. We show that transits, especially in the case of multiple artificial objects, could be used for the emission of attention-getting signals, with a sky coverage comparable to the laser pulse method. The large number of expected planets (several hundreds) to be discovered by the transit method by next space missions will allow to test these ideas.

  20. Microgravity Flow Regime Transition Modeling 

    E-Print Network [OSTI]

    Shephard, Adam M.

    2010-07-14

    Flow regime transitions and the modeling thereof underlie the design of microgravity two-phase systems. Through the use of the zero-g laboratory, microgravity two-phase flows can be studied. Because microgravity two-phase flows exhibit essentially...

  1. Transition metal sulfide loaded catalyst

    DOE Patents [OSTI]

    Maroni, V.A.; Iton, L.E.; Pasterczyk, J.W.; Winterer, M.; Krause, T.R.

    1994-04-26

    A zeolite-based catalyst is described for activation and conversion of methane. A zeolite support includes a transition metal (Mo, Cr or W) sulfide disposed within the micropores of the zeolite. The catalyst allows activation and conversion of methane to C[sub 2]+ hydrocarbons in a reducing atmosphere, thereby avoiding formation of oxides of carbon.

  2. Transition metal sulfide loaded catalyst

    DOE Patents [OSTI]

    Maroni, Victor A. (Naperville, IL); Iton, Lennox E. (Downers Grove, IL); Pasterczyk, James W. (Westmont, IL); Winterer, Markus (Westmont, IL); Krause, Theodore R. (Lisle, IL)

    1994-01-01

    A zeolite based catalyst for activation and conversion of methane. A zeolite support includes a transition metal (Mo, Cr or W) sulfide disposed within the micropores of the zeolite. The catalyst allows activation and conversion of methane to C.sub.2 + hydrocarbons in a reducing atmosphere, thereby avoiding formation of oxides of carbon.

  3. Baryon Transition in Holographic QCD

    E-Print Network [OSTI]

    Si-wen Li

    2015-09-24

    We propose a mechanism of holographic baryon transition in the Sakai-Sugimoto (SS) model: baryons in this model can jump to different states under the mediated effect of gravitons (or glueballs by holography). We consider a time-dependent gravitational perturbation from M5-brane solution of D=11 supergravity and by employing the relations between 11D M-theory and IIA string theory, we get its 10 dimensional counterpart in the SS model. Such a perturbation is received by the D4-branes wrapped on the $S^{4}$ part of the 10D background, namely the baryon vertex. Technically, baryons in the SS model are described by BPST instanton ansatz and their dynamics can be analyzed using the quantum mechanical system in the instanton's moduli space. In this way, different baryonic states are marked by quantum numbers of moduli space quantum mechanics. By holographic spirit, the gravitational perturbation enters the Hamiltonian as a time-dependent perturbation and it is this time-dependent perturbative Hamiltonian produces the transition between different baryonic states. We calculate the transition probability and get the selection rule and also compute the condition for baryon transition and give the possible transition processes in the limit $\\omega\\gg\\left|\\vec{k}\\right|^{2}$. Since in 10D language, the fluctuation from 11D metric are the perturbation of 10D metric and dilaton which are the modes carried by close strings, thus from the string theory point of view, our proposition can be accounted as the baryonic D4 brane jumps to different states by emitting or absorbing close strings coming from the bulk. In the viewpoints of QCD, it could be interpreted as that baryons transform to different states by interacting with glueballs as a low energy effective theory.

  4. SunLine Transit Agency, Hydrogen Powered Transit Buses: Preliminary Evaluation Results

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2007-02-01

    This paper provides preliminary results from an evaluation by DOE's National Renewable Energy Laboratory of hydrogen-powered transit buses at SunLine Transit Agency.

  5. New York City Transit Hybrid and CNG Transit Buses: Interim Evaluation Results

    SciTech Connect (OSTI)

    Chandler, K.; Eberts, E.; Eudy, L.

    2006-01-01

    This report focuses on the evaluation of compressed natural gas (CNG) and diesel hybrid electric bus propulsion systems in New York City Transit's transit buses.

  6. Phase Transitions in the Early Universe

    E-Print Network [OSTI]

    Wainwright, Carroll Livingston

    2013-01-01

    rapid change in the minimum caused by either the disappearance of the phase or a second- order phase transition.

  7. Transit Infrastructure Finance Through Station Location Auctions

    E-Print Network [OSTI]

    Ian Carlton

    2009-01-01

    the transit operations and capital costs for various stationwill help yield greater capital cost coverage than they

  8. Transit Infrastructure Finance Through Station Location Auctions

    E-Print Network [OSTI]

    Ian Carlton

    2009-01-01

    Numerous route and station options Strong real estate marketreal estate market Transit friendly constituents Numerous route and station options

  9. Electronic transitions of palladium dimer

    SciTech Connect (OSTI)

    Qian, Yue; Ng, Y. W.; Chen, Zhihua; Cheung, A. S.-C., E-mail: hrsccsc@hku.hk [Department of Chemistry, The University of Hong Kong, Pokfulam Road (Hong Kong)

    2013-11-21

    The laser induced fluorescence spectrum of palladium dimer (Pd{sub 2}) in the visible region between 480 and 700 nm has been observed and analyzed. The gas-phase Pd{sub 2} molecule was produced by laser ablation of palladium metal rod. Eleven vibrational bands were observed and assigned to the [17.1] {sup 3}II{sub g} - X{sup 3}?{sub u}{sup +} transition system. The bond length (r{sub o}) and vibrational frequency (?G{sub 1/2}) of the ground X{sup 3}?{sub u}{sup +} state were determined to be 2.47(4) Å and 211.4(5) cm{sup ?1}, respectively. A molecular orbital energy level diagram was used to understand the observed ground and excited electronic states. This is the first gas-phase experimental investigation of the electronic transitions of Pd{sub 2}.

  10. Articulated transition duct in turbomachine

    DOE Patents [OSTI]

    Flanagan, James Scott; McMahan, Kevin Weston; LeBegue, Jeffrey Scott; Pentecost, Ronnie Ray

    2014-04-29

    Turbine systems are provided. A turbine system includes a transition duct comprising an inlet, an outlet, and a duct passage extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis. The outlet of the transition duct is offset from the inlet along the longitudinal axis and the tangential axis. The duct passage includes an upstream portion and a downstream portion. The upstream portion extends from the inlet between an inlet end and an aft end. The downstream portion extends from the outlet between an outlet end and a head end. The turbine system further includes a joint coupling the aft end of the upstream portion and the head end of the downstream portion together. The joint is configured to allow movement of the upstream portion and the downstream portion relative to each other about or along at least one axis.

  11. TRB-Transit Cooperative Research Program (TCRP): Case Studies...

    Open Energy Info (EERE)

    TRB-Transit Cooperative Research Program (TCRP): Case Studies in Bus Rapid Transit Jump to: navigation, search Tool Summary LAUNCH TOOL Name: TRB-Transit Cooperative Research...

  12. Fuel Cell Transit Bus Coordination and Evaluation Plan California...

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

    Bus Coordination and Evaluation Plan California Fuel Cell Transit Evaluation Team Fuel Cell Transit Bus Coordination and Evaluation Plan California Fuel Cell Transit Evaluation...

  13. Phase Transition Behavior: from Decision to Optimization

    E-Print Network [OSTI]

    Walsh, Toby

    Phase Transition Behavior: from Decision to Optimization John Slaney Australian National University, therefore, that insights into decision problems gained by studying phase transition behavior could be useful is a rapid increase in problem diÆculty. The random 2-Sat transition is continuous (or \\2nd order

  14. Termination Analysis with Compositional Transition Invariants

    E-Print Network [OSTI]

    Kröning, Daniel

    Termination Analysis with Compositional Transition Invariants Daniel Kroening1 , Natasha Sharygina2 termination provers rely on a safety checker to con- struct disjunctively well-founded transition invariants that uses a light-weight check based on transitivity of ranking relations to prove program termination. We

  15. Transition 

    E-Print Network [OSTI]

    Welling, Lois

    1982-01-01

    as he approached the bed. Trying to postpone the inevitable? she asked herself, He lifted Annie and settled her onto the floor pallet. As he slid into bed he said, "I am not fooled, Susan. I know you are awake." She turned her back on him in a huff...

  16. Pressure-Induced Electronic Phase Transitions Transition Metal Oxides and Rare Earth Metals

    E-Print Network [OSTI]

    Islam, M. Saif

    Pressure-Induced Electronic Phase Transitions in Transition Metal Oxides and Rare Earth Metals Metal Oxides and Rare Earth Metals by Brian Ross Maddox Electron correlation can affect profound changes transition in a transition metal monoxide. iv #12;The lanthanides (the 4f metals also known as rare-earths

  17. Electromagnetic transitions with effective operators

    E-Print Network [OSTI]

    Ionel Stetcu; Bruce R. Barrett; Petr Navratil; Calvin W. Johnson

    2004-09-30

    In the no-core shell model formalism we compute effective one- and two-body operators, using the Lee-Suzuki procedure within the two-body cluster approximation. We evaluate the validity of the latter through calculations in reduced model spaces. In particular, we test the results for the two-body system and find that indeed the effective operators in the reduced space reproduce the expectation values or transition strengths computed in the full space. On the other hand, the renormalization for operators in the case of 6Li is very weak, suggesting the need for higher-body clusters in computing the effective interaction.

  18. Glass Transition in Confined Geometry

    E-Print Network [OSTI]

    Simon Lang; Vitalie Botan; Martin Oettel; David Hajnal; Thomas Franosch; Rolf Schilling

    2010-08-23

    Extending mode-coupling theory, we elaborate a microscopic theory for the glass transition of liquids confined between two parallel flat hard walls. The theory contains the standard MCT equations in bulk and in two dimensions as limiting cases and requires as input solely the equilibrium density profile and the structure factors of the fluid in confinement. We evaluate the phase diagram as a function of the distance of the plates for the case of a hard sphere fluid and obtain an oscillatory behavior of the glass transtion line as a result of the structural changes related to layering.

  19. Shim for sealing transition pieces

    DOE Patents [OSTI]

    Lacy, Benjamin Paul (Greer, SC); Demiroglu, Mehmet (Troy, NY); Sarawate, Neelesh Nandkumar (Niskayuna, NY)

    2012-07-24

    According to one aspect of the invention, a shim for sealing two adjacent turbine transition pieces is disclosed. The shim includes a circumferential member that includes a first lateral flange and a second lateral flange. Further, the first and second lateral flanges each comprise a tab configured to mate to a first surface plane and the first and second lateral flanges are configured to mate to a second surface plane, wherein the first and second surface planes are substantially parallel. In addition, the shim includes a first flange extending substantially perpendicular from the circumferential member.

  20. Low floor mass transit vehicle

    DOE Patents [OSTI]

    Emmons, J. Bruce (Beverly Hills, MI); Blessing, Leonard J. (Rochester, MI)

    2004-02-03

    A mass transit vehicle includes a frame structure that provides an efficient and economical approach to providing a low floor bus. The inventive frame includes a stiff roof panel and a stiff floor panel. A plurality of generally vertical pillars extend between the roof and floor panels. A unique bracket arrangement is disclosed for connecting the pillars to the panels. Side panels are secured to the pillars and carry the shear stresses on the frame. A unique seating assembly that can be advantageously incorporated into the vehicle taking advantage of the load distributing features of the inventive frame is also disclosed.

  1. Transition Plan | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report1538-1950 Timeline of Events:Smart MetersNuclearTransition Plan

  2. Transition Radiation Detector to Search for Dark Matter in Space

    E-Print Network [OSTI]

    Roma "La Sapienza", Università di

    The AMS-02 Transition Radiation Detector to Search for Dark Matter in Space The AMSThe AMS--0202 Transition Radiation DetectorTransition Radiation Detector to Search for Dark Matter in Spaceto Search.it On behalf of the AMS collaboration Transition Radiation DetectorTransition Radiation Detector Transition

  3. Buckling transition in long ?-helices

    SciTech Connect (OSTI)

    Palen?ár, Peter; Bleha, Tomáš

    2014-11-07

    The treatment of bending and buckling of stiff biopolymer filaments by the popular worm-like chain model does not provide adequate understanding of these processes at the microscopic level. Thus, we have used the atomistic molecular-dynamic simulations and the Amber03 force field to examine the compression buckling of ?-helix (AH) filaments at room temperature. It was found that the buckling instability occurs in AHs at the critical force f{sub c} in the range of tens of pN depending on the AH length. The decrease of the force f{sub c} with the contour length follows the prediction of the classic thin rod theory. At the force f{sub c} the helical filament undergoes the swift and irreversible transition from the smoothly bent structure to the buckled one. A sharp kink in the AH contour arises at the transition, accompanied by the disruption of the hydrogen bonds in its vicinity. The kink defect brings in an effective softening of the AH molecule at buckling. Nonbonded interactions between helical branches drive the rearrangement of a kinked AH into the ultimate buckled structure of a compact helical hairpin described earlier in the literature.

  4. Class Transitions in Black Holes

    E-Print Network [OSTI]

    Sandip K. Chakrabarti

    2005-01-14

    A black hole spectrum is known to change from the hard state to the soft state when the energy spectral index $\\alpha$ ($F_E \\propto E^{-\\alpha}$) in, say, 2-20 keV range changes from $\\alpha \\sim 0.5$ to $\\sim 1.5$. However, this `classical' definition which characterizes black holes like Cyg X-1, becomes less useful for many objects such as GRS 1915+105 in which the spectral slope is seen to vary from one to the other in a matter of seconds and depending on whether or not winds form, the spectral slope also changes. The light curves and the colour-colour diagrams may look completely different on different days depending on the frequency and mode of switching from one spectral state to the other. Though RXTE observations have yielded wealth of information on such `variability classes' in GRS 1915+105, very rarely one has been able to observe how the object goes from one class to the other. In the present review, we discuss possible origins of the class transition and present several examples of such transitions. In this context, we use mostly the results of the Indian X-ray Astronomy Experiment (IXAE) which observed GRS 1915+105 more regularly.

  5. On artificial transits feasibility and SETI

    E-Print Network [OSTI]

    Luc Arnold

    2005-09-15

    It is known that the shape of a planet (oblateness, rings, etc.) slightly modifies the shape of the transit light curve. The forthcoming space missions (Corot, Kepler), able to detect the transit of Earth-like planets, could a fortiori also detect the transit of artificial planet-size objects if their shape is significantly different from a natural (planetary) object. Multiple artificial objects would also produce transit light curves easily recognizable from natural transits. Artificial transits, especially of multiple objects, could be used for the transmission of clear attention-getting signals, with a sky coverage (efficiency) comparable to that of the laser pulse method. Although out of reach of current human technologies, the building of an Earth-size 1-micron thick mask would require energy and bulk material amounts already managed on Earth today. The migration of the mask toward an inner orbit and its protection against asteroids or meteoroids are also briefly discussed.

  6. Analysis of Nuclear Quantum Phase Transitions

    SciTech Connect (OSTI)

    Li, Z. P.; Meng, J.; Niksic, T.; Vretenar, D.; Lalazissis, G. A.; Ring, P.

    2009-08-26

    A microscopic analysis, based on nuclear energy density functionals, is presented for shape phase transitions in Nd isotopes. Low-lying excitation spectra and transition probabilities are calculated starting from a five-dimensional Hamiltonian, with parameters determined by constrained relativistic mean-field calculations for triaxial shapes. The results reproduce available data, and show that there is an abrupt change of structure at N = 90, that corresponds to a first-order quantum phase transition between spherical and axially deformed shapes.

  7. NO TRANSIT TIMING VARIATIONS IN WASP-4

    SciTech Connect (OSTI)

    Petrucci, R.; Schwartz, M.; Buccino, A. P.; Mauas, P. J. D.; Jofré, E.; Cúneo, V.; Gómez, M.; Martínez, C.

    2013-12-20

    We present six new transits of the system WASP-4. Together with 28 light curves published in the literature, we perform a homogeneous study of its parameters and search for variations in the transits' central times. The final values agree with those previously reported, except for a slightly lower inclination. We find no significant long-term variations in i or R{sub P} /R {sub *}. The O-C mid-transit times do not show signs of transit timing variations greater than 54 s.

  8. Transitioning the Transportation Sector: Exploring the Intersection...

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

    held the Transitioning the Transportation Sector: Exploring the Intersection of Hydrogen Fuel Cell and Natural Gas Vehicles workshop in Washington, D.C., on September 9, 2014....

  9. AVTA: Transit Vehicle Specifications and Test Procedures

    Broader source: Energy.gov [DOE]

    All Advanced Vehicle Testing Activity transit projects follow a rigorous data collection and analysis protocol. Refer to "General Evaluation Plan: Fleet Test and Evaluation Projects" for...

  10. Aspects of the non-zonal transition

    SciTech Connect (OSTI)

    Pueschel, M. J.; Terry, P. W. [Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)] [Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States); Hatch, D. R. [Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States)] [Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States)

    2014-05-15

    The non-zonal transition, a process which can bring about very large heat fluxes in gyrokinetic simulations, occurs once a certain threshold plasma ? is reached. This threshold is parameterized via a simulation database, yielding an expression estimating at what ? a given system may approach the transition. Furthermore, the diffusive outward transport of a heat blob in a temperature profile marginally stable with respect to the non-zonal transition is discussed: the resulting transport timescale combines the underlying turbulent transport timescale and the linear instability growth time, thus demonstrating that the non-zonal transition provides a mechanism for very fast heat dissipation.

  11. Dynamics of stimulated L ? H transitions

    SciTech Connect (OSTI)

    Miki, K. [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of) [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of); Center for Computational Science and e-Systems, Japan Atomic Energy Agency, Chiba 277-8587 (Japan); Diamond, P. H.; Xiao, W. W. [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of) [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of); Center for Momentum Transport and Flow Organization, University of California, San Diego, California 92093 (United States); Hahn, S.-H. [KSTAR Team, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of)] [KSTAR Team, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of); Gürcan, Ö. D. [LPP, Ecole Polytechnique, CNRS, 92118 Palaiseau Cedex (France)] [LPP, Ecole Polytechnique, CNRS, 92118 Palaiseau Cedex (France); Tynan, G. R. [Center for Momentum Transport and Flow Organization, University of California, San Diego, California 92093 (United States)] [Center for Momentum Transport and Flow Organization, University of California, San Diego, California 92093 (United States)

    2013-08-15

    We report on model studies of stimulated L ? H transitions [K. Miki et al., Phys. Rev. Lett. 110, 195002 (2013)]. These studies use a reduced mesoscale model. Model studies reveal that L ? H transition can be triggered by particle injection into a subcritical state (i.e., Ptransition. For low ambient heating, strong injection is predicted to trigger a transient turbulence collapse. Repetitive injection at a period less than the lifetime of the collapsed state can thus maintain the turbulence collapse and so sustain a driven H-mode-like state. The total number of particles required to induce a transition by either injection or gas puffing is estimated. Results indicate that the total number of injected particles required is much smaller than that required for a transition by gas puffing. We thus show that internal injection is more efficient than gas puffing of comparable strength. We also observe that zonal flows do not play a critical role in stimulated transitions. For spontaneous transitions, the spike of the Reynolds work of turbulence on the zonal flow precedes the spike in the mean electric field shear. In contrast, we show that the two are coincident for stimulated transitions, suggesting that there is no causal link between zonal and mean flows for stimulated transitions.

  12. Transition Radiation Detector in MACRO

    E-Print Network [OSTI]

    M. N. Mazziotta; for the MACRO Collaboration

    1999-05-13

    The MACRO detector is located in the Gran Sasso Laboratory. MACRO's overburden varies from 3150 to 7000 hg/cm^2. A transition radiation detector (TRD) has been added to the MACRO detector in order to measure the residual energy of muons entering MACRO, i.e. the energy they have after passing through the Gran Sasso's rock overburden. The TRD consists of three identical modules with a total horizontal area of 36 m^2. The results presented here are referred to single and double events in MACRO with one muon crossing one of the TRD modules. Our data show that double muons are more energetic than single ones, as predicted by the interaction models of primary cosmic rays with the atmosphere.

  13. Synthesis of transition metal carbonitrides

    DOE Patents [OSTI]

    Munir, Zuhair A. R. (Davis, CA); Eslamloo-Grami, Maryam (Davis, CA)

    1994-01-01

    Transition metal carbonitrides (in particular, titanium carbonitride, TiC.sub.0.5 N.sub.0.5) are synthesized by a self-propagating reaction between the metal (e.g., titanium) and carbon in a nitrogen atmosphere. Complete conversion to the carbonitride phase is achieved with the addition of TiN as diluent and with a nitrogen pressure .gtoreq.0.6 MPa. Thermodynamic phase-stability calculations and experimental characterizations of quenched samples provided revealed that the mechanism of formation of the carbonitride is a two-step process. The first step involves the formation of the nonstoichiometric carbide, TiC.sub.0.5, and is followed by the formation of the product by the incorporation of nitrogen in the defect-structure carbide.

  14. PUREX transition project case study

    SciTech Connect (OSTI)

    Jasen, W.G.

    1996-04-15

    In December 1992, the US Department of Energy (DOE) directed that the Plutonium-Uranium Extraction (PUREX) Plant be shut down and deactivated because it was no longer needed to support the nation`s production of weapons-grade plutonium. The PUREX/UO{sub 2} Deactivation Project will establish a safe and environmentally secure configuration for the facility and preserve that configuration for 10 years. The 10-year span is used to predict future maintenance requirements and represents the estimated time needed to define, authorize, and initiate the follow-on decontamination and decommissioning activities. Accomplishing the deactivation project involves many activities. Removing major hazards, such as excess chemicals, spent fuel, and residual plutonium are major goals of the project. The scope of the PUREX Transition Project is described within.

  15. Emission Testing of Washington Metropolitan Area Transit Authority (WMATA) Natural Gas and Diesel Transit Buses

    SciTech Connect (OSTI)

    Melendez, M.; Taylor, J.; Wayne, W. S.; Smith, D.; Zuboy, J.

    2005-12-01

    An evaluation of emissions of natural gas and diesel buses operated by the Washington Metro Area Transit Authority.

  16. IEEE TRANSACTIONS ON SERVICES COMPUTING, 201X 1 Spot Transit: Cheaper Internet Transit

    E-Print Network [OSTI]

    Li, Baochun

    Internet transit market, where transit is sold using the under-utilized backbone capacity at a lower price capacity is sold at a lower price to compliment the traditional contract-based market. To serve the spot. The providers can improve profit by capitalizing the perishable capacity, and customers can buy transit

  17. Cell Stem Cell Sic Transit Gloria

    E-Print Network [OSTI]

    Simons, Ben

    Cell Stem Cell Review Sic Transit Gloria: Farewell to the Epidermal Transit Amplifying Cell? Philip H. Jones,1,* Benjamin D. Simons,2 and Fiona M. Watt3,4 1MRC Cancer Cell Unit, Hutchison-MRC Research basement membrane (Figures 1D and 1F). On commitment to terminal differen- tiation, basal keratinocytes

  18. Quantum Phase Transitions in a Finite System

    E-Print Network [OSTI]

    A. Leviatan

    2006-12-05

    A general procedure for studying finite-N effects in quantum phase transitions of finite systems is presented and applied to the critical-point dynamics of nuclei undergoing a shape-phase transition of second-order (continuous), and of first-order with an arbitrary barrier.

  19. Energy Transition Initiative: Islands Playbook (Book)

    SciTech Connect (OSTI)

    Not Available

    2015-01-01

    The Island Energy Playbook (the Playbook) provides an action-oriented guide to successfully initiating, planning, and completing a transition to an energy system that primarily relies on local resources to eliminate a dependence on one or two imported fuels. It is intended to serve as a readily available framework that any community can adapt to organize its own energy transition effort.

  20. Collapse transition in proteins D. Thirumalaib

    E-Print Network [OSTI]

    Thirumalai, Devarajan

    . We describe the basics of the collapse transition, starting with homopolymers and continuing to overcome a free energy barrier, fleetingly populating the transition state. The energetic balance between.haran@weizmann.ac.il b Biophysics Program, Institute for Physical Science and Technology and Department of Chemistry

  1. Hadronic transitions ?(2S)??(1S)

    E-Print Network [OSTI]

    Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, L.

    1998-08-07

    Using a 73.6pb(-1) data sample of ?(2S) events collected with the CLEO II detector at the Cornell Electron Storage Ring, we have investigated the hadronic transitions between the ?(2S) and the ?(1S). The dipion transition ...

  2. California's Transition To Local Renewable Energy

    E-Print Network [OSTI]

    Kammen, Daniel M.

    California's Transition To Local Renewable Energy: 12,000 Megawatts By 2020 A Report on the Governor's Conference on Local Renewable Energy June 7, 2012 #12;This report was made possible. #12;California's Transition To Local Renewable Energy: 12,000 Megawatts By 2020 A Report

  3. A Simulation Study of Demand Responsive Transit System Design

    E-Print Network [OSTI]

    Dessouky, Maged

    A Simulation Study of Demand Responsive Transit System Design Luca Quadrifoglio, Maged M. Dessouky changed the landscape for demand responsive transit systems. First, the demand for this type of transit experiencing increased usage for demand responsive transit systems. The National Transit Summaries and Trends

  4. QCD Phase Transitions, Volume 15

    SciTech Connect (OSTI)

    Schaefer, T.; Shuryak, E.

    1999-03-20

    The title of the workshop, ''The QCD Phase Transitions'', in fact happened to be too narrow for its real contents. It would be more accurate to say that it was devoted to different phases of QCD and QCD-related gauge theories, with strong emphasis on discussion of the underlying non-perturbative mechanisms which manifest themselves as all those phases. Before we go to specifics, let us emphasize one important aspect of the present status of non-perturbative Quantum Field Theory in general. It remains true that its studies do not get attention proportional to the intellectual challenge they deserve, and that the theorists working on it remain very fragmented. The efforts to create Theory of Everything including Quantum Gravity have attracted the lion share of attention and young talent. Nevertheless, in the last few years there was also a tremendous progress and even some shift of attention toward emphasis on the unity of non-perturbative phenomena. For example, we have seen some efforts to connect the lessons from recent progress in Supersymmetric theories with that in QCD, as derived from phenomenology and lattice. Another example is Maldacena conjecture and related development, which connect three things together, string theory, super-gravity and the (N=4) supersymmetric gauge theory. Although the progress mentioned is remarkable by itself, if we would listen to each other more we may have chance to strengthen the field and reach better understanding of the spectacular non-perturbative physics.

  5. Vehicle Modeling and Verification of CNG-Powered Transit Buses

    E-Print Network [OSTI]

    Hedrick, J. K.; Ni, A.

    2004-01-01

    Modeling and Verification of CNG-Powered Transit BusesModeling and Verification of CNG-Powered Transit Buses.Modeling and Veri?cation of CNG-Powered Transit Buses J.K.

  6. Development and Validation of the Transition Coordinators Survey

    E-Print Network [OSTI]

    Bjorkman Wade, Diana K.

    2014-05-31

    The purpose of this study was to create a valid and reliable instrument for the field of secondary special education and transition by developing and validating the Transition Coordinators Survey (TCS). Transition coordinators ...

  7. SUSY and the Electroweak Phase Transition

    E-Print Network [OSTI]

    Glennys R. Farrar; Marta Losada

    1996-12-12

    We analyze the effective 3 dimensional theory previously constructed for the MSSM and multi-Higgs models to determine the regions of parameter space in which the electroweak phase transition is sufficiently strong for a $B+L$ asymmetry to survive in the low temperature phase. We find that the inclusion of all supersymmetric scalars and all 1-loop corrections has the effect of enhancing the strength of the phase transition. Without a light stop or extension of the MSSM the phase transition is sufficiently first order only if the lightest Higgs mass $M_{h}\\lsi 70$ GeV and $tan\\beta\\lsi 1.75$.

  8. Transition to turbulence in particulate pipe flow

    E-Print Network [OSTI]

    Matas, J P; Guazzelli, E; Matas, Jean-Philippe; Morris, Jeffrey F.; Guazzelli, Elisabeth

    2003-01-01

    We investigate experimentally the influence of suspended particles on the transition to turbulence. The particles are monodisperse and neutrally-buoyant with the liquid. The role of the particles on the transition depends both upon the pipe to particle diameter ratios and the concentration. For large pipe-to-particle diameter ratios the transition is delayed while it is lowered for small ratios. A scaling is proposed to collapse the departure from the critical Reynolds number for pure fluid as a function of concentration into a single master curve.

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

    Open Energy Info (EERE)

    Geographic Information System At Walker-Lane Transitional Zone Region (Coolbaugh, Et Al., 2005 - 2) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal...

  10. Program Sustainability Peer Exchange Call: Transitioning to a...

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

    Program Sustainability Peer Exchange Call: Transitioning to a Utility Funded Program Environment: What Do I Need to Know? Program Sustainability Peer Exchange Call: Transitioning...

  11. Seismic anisotropy changes across upper mantle phase transitions

    E-Print Network [OSTI]

    Yuan, K; Beghein, C

    2013-01-01

    and the transition- zone water filter. Nature 425, 39–44.zone acts as a water filter. Key words: Transition zone,

  12. Regulated Emissions from Diesel and Compressed Natural Gas Transit...

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

    Emissions from Diesel and Compressed Natural Gas Transit Buses Regulated Emissions from Diesel and Compressed Natural Gas Transit Buses Poster presentaiton at the 2007 Diesel...

  13. CNG and Diesel Transite Bus Emissions in Review | Department...

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

    CNG and Diesel Transite Bus Emissions in Review CNG and Diesel Transite Bus Emissions in Review 2003 DEER Conference Presentation: California Environmental Protection Agency, Air...

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

    Open Energy Info (EERE)

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

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

    Open Energy Info (EERE)

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

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

    Open Energy Info (EERE)

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

  17. Transitioning Kentucky Off Oil: An Interview with Clean Cities...

    Office of Environmental Management (EM)

    Transitioning Kentucky Off Oil: An Interview with Clean Cities Coordinator Melissa Howell Transitioning Kentucky Off Oil: An Interview with Clean Cities Coordinator Melissa Howell...

  18. Hiring Our Heroes Transition and Benefits Career Fair- Baltimore...

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

    Hiring Our Heroes Transition and Benefits Career Fair- Baltimore, MD part of the 97th Annual American Legion National Convention Hiring Our Heroes Transition and Benefits Career...

  19. Graphene physics and insulator-metal transition in compressed...

    Office of Scientific and Technical Information (OSTI)

    Graphene physics and insulator-metal transition in compressed hydrogen Title: Graphene physics and insulator-metal transition in compressed hydrogen Authors: Naumov, Ivan I. ;...

  20. Unbalanced edge modes and topological phase transition in gated...

    Office of Scientific and Technical Information (OSTI)

    Unbalanced edge modes and topological phase transition in gated trilayer graphene Prev Next Title: Unbalanced edge modes and topological phase transition in gated trilayer...

  1. Insight into obscure transition uncovered by X-rays | Argonne...

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

    of X-ray techniques. This transition has ramifications for material design for electronics and sensors. The transition between being electrically conductive (metallic) at...

  2. POLICY GUIDANCE MEMORANDUM #19 Guidance on Transition to Eliminate...

    Office of Environmental Management (EM)

    9 Guidance on Transition to Eliminate FCIP (Expired) POLICY GUIDANCE MEMORANDUM 19 Guidance on Transition to Eliminate FCIP (Expired) THIS GUIDANCE HAS EXPIRED Guidance on the...

  3. LM Records and Information Management Transition Guidance (January...

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

    document establishes a framework for developing a Records and Information Management Transition Plan as part of the overall transition effort for a legacy site. LM Records and...

  4. Permeation of Multiple Isotopes in the Transition Between Surface...

    Office of Environmental Management (EM)

    Permeation of Multiple Isotopes in the Transition Between Surface- and Diffusion-Limited Regimes Permeation of Multiple Isotopes in the Transition Between Surface- and...

  5. Thermodynamic Investigations of Lithium- and Manganese-Rich Transition...

    Office of Environmental Management (EM)

    Thermodynamic Investigations of Lithium- and Manganese-Rich Transition Metal Oxides Thermodynamic Investigations of Lithium- and Manganese-Rich Transition Metal Oxides 2013 DOE...

  6. Integrated Market Modeling of Hydrogen Transition Scenarios with...

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

    Integrated Market Modeling of Hydrogen Transition Scenarios with HyTrans Integrated Market Modeling of Hydrogen Transition Scenarios with HyTrans Presentation by Paul Leiby of Oak...

  7. Energy Independence for North America - Transition to the Hydrogen...

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

    Independence for North America - Transition to the Hydrogen Economy Energy Independence for North America - Transition to the Hydrogen Economy 2003 DEER Conference Presentation:...

  8. SPIDERS Phase 2 Fort Carson Technology Transition Consolidated...

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

    Carson Technology Transition Consolidated Report SPIDERS Phase 2 Fort Carson Technology Transition Consolidated Report Final program public report for phase 2 summarizes the key...

  9. "Renewable Energy Transition and International Climate Cooperation

    E-Print Network [OSTI]

    Sheridan, Jennifer

    "Renewable Energy Transition and International Climate Cooperation: The German Experience" Jürgen and sustainability science; complex systems analysis, mathematical modeling and computer simulation; technology assessment, arms control and international security. For more information: eucenter

  10. Seismic imaging of the mantle transition zone

    E-Print Network [OSTI]

    Cao, Qin, Ph. D. Massachusetts Institute of Technology

    2012-01-01

    In this thesis, we developed a generalized Radon transform of SS precursors for large-scale, high-resolution seismo-stratigraphy of the upper mantle transition zone. The generalized Radon transform (GRT) is based on the ...

  11. Sensitivity to perturbations and quantum phase transitions

    E-Print Network [OSTI]

    D. A. Wisniacki; A. Roncaglia

    2013-05-15

    The local density of states or its Fourier transform, usually called fidelity amplitude, are important measures of quantum irreversibility due to imperfect evolution. In this Rapid Communication we study both quantities in a paradigmatic many body system, the Dicke Hamiltonian, where a single-mode bosonic field interacts with an ensemble of N two-level atoms. This model exhibits a quantum phase transition in the thermodynamic limit, while for finite instances the system undergoes a transition from quasi-integrability to quantum chaotic. We show that the width of the local density of states clearly points out the imprints of the transition from integrability to chaos but no trace remains of the quantum phase transition. The connection with the decay of the fidelity amplitude is also established.

  12. Knoxville Area Transit: Propane Hybrid Electric Trolleys

    SciTech Connect (OSTI)

    Not Available

    2005-04-01

    A 2-page fact sheet summarizing the evaluation done by the U.S. Department of Energy's Advanced Vehicle Testing Activity on the Knoxville Area Transit's use of propane hybrid electric trolleys.

  13. Quantum Phase Transition in a Graphene Model

    E-Print Network [OSTI]

    Simon Hands; Costas Strouthos

    2008-08-20

    We present results for the equation of state of a graphene-like model in an effort to understand the properties of its quantum phase transition. The N_f fermion species interact through a three dimensional instantaneous Coulomb potential. Since there are no reliable analytical tools that work for all values of N_f and the coupling constant g, we rely on Monte Carlo simulations to calculate the critical properties of the model near the phase transition. We consider the four-component formulation for the fermion fields, which arises naturally as the continuum limit of the staggered fermion construction in (2+1) dimensions. In the limit of infinitely strong Coulomb interaction, the system undergoes a quantum phase transition at a critical number of fermion species N_fc ~ 4.7. We also calculate the values of the critical exponents at the quantum phase transition.

  14. Thermal transition temperature from twisted mass QCD

    E-Print Network [OSTI]

    Florian Burger; Ernst-Michael Ilgenfritz; Malik Kirchner; Maria Paola Lombardo; Michael Müller-Preussker; Owe Philipsen; Carsten Urbach; Lars Zeidlewicz

    2010-09-20

    We present the current status of lattice simulations with N_f=2 maximally twisted mass Wilson fermions at finite temperature. In particular, the determination of the thermal transition temperature is discussed.

  15. Transition Matrix Elements for Pion Photoproduction

    E-Print Network [OSTI]

    Mohamed E. Kelabi

    2007-03-20

    We have obtained the transition matrix elements for pion photoproduction by considering the number of gamma matrices involved. The approach based on the most general conditions of gauge invariance, current conservation and transversality. The approach is fairly consistent with literatures.

  16. A principal in transition: an autoethnography 

    E-Print Network [OSTI]

    Dethloff, Carl Henry

    2007-04-25

    This research represents a highly personalized account of the complexities, interpretations, and reflections of a principal in transition from one elementary school to another elementary school in the same district. Using ...

  17. Decidability, Behavioural Equivalences and Infinite Transition Graphs 

    E-Print Network [OSTI]

    Hüttel, Hans

    This thesis studies behavioural equivalences on labelled infinite transition graphs and the role that they can play in the context of modal logics and notions from language theory. A natural class of such infinite graphs ...

  18. Transition metal fluorides: from superconductors to multiferroics. 

    E-Print Network [OSTI]

    Drathen, Christina

    2013-06-29

    Transition metal fluorides represent an important family of complex solids displaying a variety of different properties and interesting phenomena. Despite their remarkable behaviour, these classes of materials have not ...

  19. Does Sex Induce a Phase Transition?

    E-Print Network [OSTI]

    de Oliveira, P M C; Stauffer, D; Cebrat, S; Pekalski, A; 10.1140/epjb/e2008-00229-3

    2009-01-01

    We discovered a dynamic phase transition induced by sexual reproduction. The dynamics is a pure Darwinian rule with both fundamental ingredients to drive evolution: 1) random mutations and crossings which act in the sense of increasing the entropy (or diversity); and 2) selection which acts in the opposite sense by limiting the entropy explosion. Selection wins this competition if mutations performed at birth are few enough. By slowly increasing the average number m of mutations, however, the population suddenly undergoes a mutational degradation precisely at a transition point mc. Above this point, the "bad" alleles spread over the genetic pool of the population, overcoming the selection pressure. Individuals become selectively alike, and evolution stops. Only below this point, m < mc, evolutionary life is possible. The finite-size-scaling behaviour of this transition is exhibited for large enough "chromosome" lengths L. One important and surprising observation is the L-independence of the transition curv...

  20. Evaluation of traffic signal controller transition methods 

    E-Print Network [OSTI]

    Hamilton, Curtis Lloyd

    2000-01-01

    A coordinated signal system achieves the best traffic progression when the signal plans are optimized at the correct offsets and intervals. When traffic conditions change and a transition to a new timing plan is warranted, it is important to reach...

  1. Phase Transitions in the Early Universe

    E-Print Network [OSTI]

    Wainwright, Carroll Livingston

    2013-01-01

    Phase Transitions in the Early Universe by Carroll L.and computation of early-Universe finite-temperature phaseM. S. Turner, “The Early universe,” Front. Phys. 69 (1990)

  2. Mass Transit & Mass: Densities Needed to Make Transit Investments Pay Off

    E-Print Network [OSTI]

    Guerra, Erick; Cervero, Robert

    2010-01-01

    Transit Ridership and Capital Costs,” Erick Guerra andof California, Berkeley ISSUE Capital costs are the biggestmean projects with low capital cost per rider on an annual

  3. Sunline Transit Agency Hydrogen-Powered Transit Buses: Evaluation Results Update

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2007-10-01

    This report provides an update on the evaluation results for hydrogen and CNG-fueled buses opertating at SunLine Transit Agency in California.

  4. Connecticut Transit (CTTRANSIT) Fuel Cell Transit Bus: Second Evaluation Report and Appendices

    Broader source: Energy.gov [DOE]

    This report describes operations at Connecticut Transit (CTTRANSIT) in Hartford for one prototype fuel cell bus and three new diesel buses operating from the same location.

  5. Matrix to Identify Candidate Rural Transit Livability Measures Performance Measure

    E-Print Network [OSTI]

    to transit operating cost Increase local support for transit service as an essential service for residents boardings per capita Increase the number of unlinked transit trips per capita as an indication of transit per capita Increase the livability of a rural area by increasing the proportion of commute trips

  6. Microwave-assisted synthesis of transition metal phosphide

    DOE Patents [OSTI]

    Viswanathan, Tito

    2014-12-30

    A method of synthesizing transition metal phosphide. In one embodiment, the method has the steps of preparing a transition metal lignosulfonate, mixing the transition metal lignosulfonate with phosphoric acid to form a mixture, and subjecting the mixture to a microwave radiation for a duration of time effective to obtain a transition metal phosphide.

  7. Early Warning Signals for Critical Transitions: A Generalized Modeling Approach

    E-Print Network [OSTI]

    rangelands [9], and desertification [10]. Warning signals for impending critical transitions are highly

  8. Impedance Scaling for Small Angle Transitions

    SciTech Connect (OSTI)

    Stupakov, G.; Bane, Karl; /SLAC; Zagorodnov, I.; /DESY; ,

    2010-10-27

    Based on the parabolic equation approach to Maxwell's equations we have derived scaling properties of the high frequency impedance/short bunch wakefields of structures. For the special case of small angle transitions we have shown the scaling properties are valid for all frequencies. Using these scaling properties one can greatly reduce the calculation time of the wakefield/impedance of long, small angle, beam pipe transitions, like one often finds in insertion regions of storage rings. We have tested the scaling with wakefield simulations of 2D and 3D models of such transitions, and found that the scaling works well. In modern ring-based light sources one often finds insertion devices having extremely small vertical apertures (on the order of millimeters) to allow for maximal undulator fields reaching the beam. Such insertion devices require that there be beam pipe transitions from these small apertures to the larger cross-sections (normally on the order of centimeters) found in the rest of the ring. The fact that there may be many such transitions, and that these transitions introduce beam pipe discontinuities very close to the beam path, means that their impedance will be large and, in fact, may dominate the impedance budget of the entire ring. To reduce their impact on impedance, the transitions are normally tapered gradually over a long distance. The accurate calculation of the impedance or wakefield of these long transitions, which are typically 3D objects (i.e. they do not have cylindrical symmetry), can be quite a challenging numerical task. In this report we present a method of obtaining the impedance of a long, small angle transition from the calculation of a scaled, shorter one. Normally, the actual calculation is obtained from a time domain simulation of the wakefield in the structure, where the impedance can be obtained by performing a Fourier transform. We shall see that the scaled calculation reduces the computer time and memory requirements significantly, especially for 3D problems, and can make the difference between being able to solve a problem or not. The method is based on the parabolic equation approach to solving Maxwell's equation developed in Refs. [1, 2].

  9. Alternative Fuel Transit Buses: DART's (Dallas Area Rapid Transit) LNG Bus Fleet Final Results

    SciTech Connect (OSTI)

    Chandler, K.; Norton, P.; Clark, N.

    2000-11-07

    In 1998, Dallas Area Rapid Transit, a public transit agency in Dallas, Texas, began operating a large fleet of heavy-duty buses powered by liquefied natural gas. As part of a $16 million commitment to alternative fuels, DART operates 139 LNG buses serviced by two new LNG fueling stations.

  10. Glass transition studies in free standing polymer films have revealed values of the transition temperature, Tg

    E-Print Network [OSTI]

    Dutcher, John

    78 Glass transition studies in free standing polymer films have revealed values of the transition neutron scattering on stacks of free standing polystyrene films with thick- nesses of 55 nm and 107 nm. We- strates [2,3]. This study focuses on free standing films (mem- branes) with the advantage that both

  11. Synthesis and characterization of nanostructured transition metal oxides for energy storage devices

    E-Print Network [OSTI]

    Kim, Jong Woung

    2012-01-01

    nanostructured transition metal oxides for energy storage devicesnanostructured transition metal oxides for energy storage devices

  12. Entanglement across a transition to quantum chaos

    SciTech Connect (OSTI)

    Mejia-Monasterio, Carlos [Center for Nonlinear and Complex Systems, Universita degli Studi dell'Insubria, via Vallegio 11, Como 22100 (Italy); Benenti, Guliano; Casati, Giulio [Center for Nonlinear and Complex Systems, Universita degli Studi dell'Insubria, via Vallegio 11, Como 22100 (Italy); Istituto Nazionale per la Fisica della Materia, Unita di Como, via Vallegio 11, Como 22100 (Italy); Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milan (Italy); Carlo, Gabriel G. [Center for Nonlinear and Complex Systems, Universita degli Studi dell'Insubria, via Vallegio 11, Como 22100 (Italy); Istituto Nazionale per la Fisica della Materia, Unita di Como, via Vallegio 11, Como 22100 (Italy)

    2005-06-15

    We study the relation between entanglement and quantum chaos in one- and two-dimensional spin-1/2 lattice models, which exhibit mixing of the noninteracting eigenfunctions and transition from integrability to quantum chaos. Contrary to what occurs in a quantum phase transition, the onset of quantum chaos is not a property of the ground state but takes place for any typical many-spin quantum state. We study bipartite and pairwise entanglement measures--namely, the reduced von Neumann entropy and the concurrence--and discuss quantum entanglement sharing. Our results suggest that the behavior of the entanglement is related to the mixing of the eigenfunctions rather than to the transition to chaos.

  13. Method of boronizing transition metal surfaces

    DOE Patents [OSTI]

    Koyama, Koichiro; Shimotake, Hiroshi.

    1983-08-16

    A method is presented for preparing a boride layer on a transition metal substrate for use in corrosive environments or as a harden surface in machine applications. This method is particularly useful in treating current collectors for use within a high temperature and corrosive electrochemical cell environment. A melt of a alkali metal boride tetrafluoride salt including such as KF to lower its melting point is prepared including a dissolved boron containing material, for instance NiB, MnB[sub 2], or CrB[sub 2]. A transition metal to be coated is immersed in the melt at a temperature of no more than 700 C and a surface boride layer of that transition metal is formed within a period of about 24 hours on the substrate surface. 4 figs.

  14. Method of boronizing transition metal surfaces

    DOE Patents [OSTI]

    Koyama, Koichiro (Hyogo, JP); Shimotake, Hiroshi (Hinsdale, IL)

    1983-01-01

    A method is presented for preparing a boride layer on a transition metal substrate for use in corrosive environments or as a harden surface in machine applications. This method is particularly useful in treating current collectors for use within a high temperature and corrosive electrochemical cell environment. A melt of a alkali metal boride tetrafluoride salt including such as KF to lower its melting point is prepared including a dissolved boron containing material, for instance NiB, MnB.sub.2, or CrB.sub.2. A transition metal to be coated is immersed in the melt at a temperature of no more than 700.degree. C. and a surface boride layer of that transition metal is formed within a period of about 24 hours on the substrate surface.

  15. Mixed phases during the phase transitions

    E-Print Network [OSTI]

    Tatsumi, Toshitaka; Maruyama, Toshiki

    2011-01-01

    Quest for a new form of matter inside compact stars compels us to examine the thermodynamical properties of the phase transitions. We closely consider the first-order phase transitions and the phase equilibrium on the basis of the Gibbs conditions, taking the liquid-gas phase transition in asymmetric nuclear matter as an example. Characteristic features of the mixed phase are figured out by solving the coupled equations for mean-fields and densities of constituent particles self-consistently within the Thomas-Fermi approximation. The mixed phase is inhomogeneous matter composed of two phases in equilibrium; it takes a crystalline structure with a unit of various geometrical shapes, inside of which one phase with a characteristic shape, called "pasta", is embedded in another phase by some volume fraction. This framework enables us to properly take into account the Coulomb interaction and the interface energy, and thereby sometimes we see the mechanical instability of the geometric structures of the mixed phase...

  16. Transition to chaos in random neuronal networks

    E-Print Network [OSTI]

    Jonathan Kadmon; Haim Sompolinsky

    2015-08-26

    Firing patterns in the central nervous system often exhibit strong temporal irregularity and heterogeneity in their time averaged response properties. Previous studies suggested that these properties are outcome of an intrinsic chaotic dynamics. Indeed, simplified rate-based large neuronal networks with random synaptic connections are known to exhibit sharp transition from fixed point to chaotic dynamics when the synaptic gain is increased. However, the existence of a similar transition in neuronal circuit models with more realistic architectures and firing dynamics has not been established. In this work we investigate rate based dynamics of neuronal circuits composed of several subpopulations and random connectivity. Nonzero connections are either positive-for excitatory neurons, or negative for inhibitory ones, while single neuron output is strictly positive; in line with known constraints in many biological systems. Using Dynamic Mean Field Theory, we find the phase diagram depicting the regimes of stable fixed point, unstable dynamic and chaotic rate fluctuations. We characterize the properties of systems near the chaotic transition and show that dilute excitatory-inhibitory architectures exhibit the same onset to chaos as a network with Gaussian connectivity. Interestingly, the critical properties near transition depend on the shape of the single- neuron input-output transfer function near firing threshold. Finally, we investigate network models with spiking dynamics. When synaptic time constants are slow relative to the mean inverse firing rates, the network undergoes a sharp transition from fast spiking fluctuations and static firing rates to a state with slow chaotic rate fluctuations. When the synaptic time constants are finite, the transition becomes smooth and obeys scaling properties, similar to crossover phenomena in statistical mechanics

  17. Electric quadrupole transition probabilities for atomic lithium

    SciTech Connect (OSTI)

    Çelik, Gültekin; Gökçe, Yasin; Y?ld?z, Murat

    2014-05-15

    Electric quadrupole transition probabilities for atomic lithium have been calculated using the weakest bound electron potential model theory (WBEPMT). We have employed numerical non-relativistic Hartree–Fock wavefunctions for expectation values of radii and the necessary energy values have been taken from the compilation at NIST. The results obtained with the present method agree very well with the Coulomb approximation results given by Caves (1975). Moreover, electric quadrupole transition probability values not existing in the literature for some highly excited levels have been obtained using the WBEPMT.

  18. Kosterlitz-Thouless Transition in Helium Films 

    E-Print Network [OSTI]

    Agnolet, Glenn; MCQUEENEY, DF; REPPY, JD.

    1989-01-01

    , Cornell University, Ithaca, Xetv York 14853 (Received 4 November 1988) The superAuid response of helium Alms with transition temperatures ranging from 70 mK to 0.5 K has been studied using a torsional oscillator technique. A detailed analysis... with the dynamic theory reveal nonuniversal behavior as a function of coverage. INTRODUCTION The superAuid phase transition in thin He films on planar surfaces is generally acknowledged to be a realiza- tion of a Kosterlitz-Thouless' (KT) two-dimensional (2D...

  19. Resonant transitions due to changing boundaries

    E-Print Network [OSTI]

    F. Anzà; A. Messina; B. Militello

    2015-01-10

    The problem of a particle confined in a box with moving walls is studied, focusing on the case of small perturbations which do not alter the shape of the boundary (\\lq pantography\\rq). The presence of resonant transitions involving the natural transition frequencies of the system and the Fourier transform of the velocity of the walls of the box is brought to the light. The special case of a pantographic change of a circular box is analyzed in dept, also bringing to light the fact that the movement of the boundary cannot affect the angular momentum of the particle.

  20. Deconfinement phase transition and the quark condensate

    E-Print Network [OSTI]

    Christian S. Fischer

    2009-07-27

    We study the dual quark condensate as a signal for the confinement-deconfinement phase transition of QCD. This order parameter for center symmetry has been defined recently by Bilgici et al. within the framework of lattice QCD. In this work we determine the ordinary and the dual quark condensate with functional methods using a formulation of the Dyson-Schwinger equations for the quark propagator on a torus. The temperature dependence of these condensates serves to investigate the interplay between the chiral and deconfinement transitions of quenched QCD.

  1. Lepton asymmetry and the cosmic QCD transition

    E-Print Network [OSTI]

    Dominik J Schwarz; Maik Stuke

    2010-09-29

    We study the influence of lepton asymmetry on the evolution of the early Universe. The lepton asymmetry $l$ is poorly constrained by observations and might be orders of magnitude larger than the baryon asymmetry $b$, $|l|/b \\leq 2\\times 10^8$. We find that lepton asymmetries that are large compared to the tiny baryon asymmetry, can influence the dynamics of the QCD phase transition significantly. The cosmic trajectory in the $\\mu_B-T$ phase diagram of strongly interacting matter becomes a function of lepton (flavour) asymmetry. Large lepton asymmetry could lead to a cosmic QCD phase transition of first order.

  2. Noise-Induced Transitions in Optomechanical Synchronization

    E-Print Network [OSTI]

    Talitha Weiss; Andreas Kronwald; Florian Marquardt

    2015-07-22

    We study how quantum and thermal noise affects synchronization of two optomechanical limit-cycle oscillators. Classically, in the absence of noise, optomechanical systems tend to synchronize either in-phase or anti-phase. Taking into account the fundamental quantum noise, we find a regime where fluctuations drive transitions between these classical synchronization states. We investigate how this "mixed" synchronization regime emerges from the noiseless system by studying the classical-to-quantum crossover and we show how the time scales of the transitions vary with the effective noise strength. In addition, we compare the effects of thermal noise to the effects of quantum noise.

  3. Bubble Free Energy in Cosmological Phase Transitions

    E-Print Network [OSTI]

    J. Ignatius

    1993-01-07

    Free energy as a function of temperature and the bubble radius is determined for spherical bubbles created in cosmological first order phase transitions. The phase transition is assumed to be driven by an order parameter (e.g. a Higgs field) with quartic potential. The definition of the bubble radius and the corresponding generalized, curvature-dependent surface tensions are discussed. In the free energy expansion in powers of the inverse radius, the coefficients of the curvature term and the constant term are also calculated.

  4. Counterintuitive transitions between crossing energy levels

    E-Print Network [OSTI]

    A. A. Rangelov; J. Piilo; N. V. Vitanov

    2010-10-06

    We calculate analytically the probabilities for intuitive and counterintuitive transitions in a three-state system, in which two parallel energies are crossed by a third, tilted energy. The state with the tilted energy is coupled to the other two states in a chainwise linkage pattern with constant couplings of finite duration. The probability for a counterintuitive transition is found to increase with the square of the coupling and decrease with the squares of the interaction duration, the energy splitting between the parallel energies, and the tilt (chirp) rate. Physical examples of this model can be found in coherent atomic excitation and optical shielding in cold atomic collisions.

  5. TigerTransit Routes & Parking Map

    E-Print Network [OSTI]

    Singh, Jaswinder Pal

    PARKING ZONE & LOT ASSIGNMENTS Parking in Princeton University parking lots is by permit only. To obtain in the assigned lot and zone indicated on the vehicle hangtag. Parking in an unassigned lot within a designated2014­2015 TigerTransit Routes & Parking Map Contact Us Transportation & Parking Services New South

  6. Nigeria 2007 Political, Social, and Economic Transitions

    E-Print Network [OSTI]

    Nigeria 2007 Political, Social, and Economic Transitions 2­4 November 2006 Program of African written will match the ongoing saga of Nigeria, absolutely nothing." -- Wole Soyinka INTERNATIONAL.m. Continental breakfast 9 a.m. "Politics and Literature in Nigeria" Wendy Griswold, Northwestern

  7. Handicap Parking Tulsa Transit Bus Stop

    E-Print Network [OSTI]

    Oklahoma, University of

    Handicap Parking N S W E Bike Rack Tulsa Transit Bus Stop Building Entrance Parking Founders Hall..........Tulsa Graduate College C Wing Floor 1..........Security Office/Police Dispatch Floor 1..........Center of Applied Research for Non-Profit Organizations Floor 1..........OU-Tulsa Enrollment & Student Financial

  8. Geometrical Dynamics in a Transitioning Superconducting Sphere

    E-Print Network [OSTI]

    James R. Claycomb; Rambis K. Chu

    2006-02-22

    Recent theoretical work has concentrated on calculating the Casimir effect in curved spacetime. In this paper we outline the forward problem of metrical variation due to the Casimir effect for spherical geometries. We consider a scalar quantum field inside a hollow superconducting sphere. Metric equations are developed describing the evolution of the scalar curvature after the sphere transitions to the normal state.

  9. Reversibleirreversible plasticity transition in twinned copper nanopillars

    E-Print Network [OSTI]

    Ghoniem, Nasr M.

    Reversible­irreversible plasticity transition in twinned copper nanopillars J.A. Brown, N 31 October 2009 Abstract Through computer simulations, we show that plasticity in twinned copper nanopillar under compression, plastic deformation can be totally reversed when rR is in the range 0:5 6 rR 6

  10. Brittle Fracture Ductile to Brittle transition

    E-Print Network [OSTI]

    Subramaniam, Anandh

    FRACTURE Brittle Fracture Ductile to Brittle transition Fracture Mechanics T.L. Anderson CRC sulphur in steel Residual stress Continuity of the structure Microcracks #12;Fracture Brittle Ductile Factors affecting fracture Strain rate State of stress Temperature #12;Behaviour described Terms Used

  11. Gravitational microlensing of stars with transiting planets

    E-Print Network [OSTI]

    Geraint F. Lewis

    2001-10-17

    If planetary systems are ubiquitous then a fraction of stars should possess a transiting planet when being microlensed. This paper presents a study of the influence of such planets on microlensing light curves. For the giant planets recently identified, the deviations in the light curve can be substantial, although the specifics of the perturbations are dependent upon the radius of the planet relative to that of the star, the location of the planet over the stellar surface and the orientation of the sweeping caustic. Given that the instantaneous probability of transiting hot-Jupiter like planets is small, less than a percent, and only a proportion of microlensing events exhibit caustic crossing events, the probability of detecting a transiting planet during a microlensing event is small, $\\sim10^{-6}$. However, a number of factors influencing this probability, such as the number of solar type star that possess planets, are uncertain, and the prospect of detecting transiting planets in future large catalogues of microlensing light curves may be viable. The results of this study also have bearing on the gravitational microlensing of spots on the stellar surface.

  12. Savannah River Site prioritization of transition activities

    SciTech Connect (OSTI)

    Finley, R.H.

    1993-11-01

    Effective management of SRS conversion from primarily a production facility to other missions (or Decontamination and Decommissioning (D&D)) requires a systematic and consistent method of prioritizing the transition activities. This report discusses the design of a prioritizing method developed to achieve systematic and consistent methods of prioritizing these activities.

  13. Current Challenges Facing Planet Transit Surveys

    E-Print Network [OSTI]

    David Charbonneau

    2003-02-11

    The initial task that confronted extrasolar-planet transit surveys was to monitor enough stars with sufficient photometric precision and complete phase coverage. Numerous searches have been pursued over the last few years. Among these projects are shallow, intermediate, and deep surveys of the Galactic plane, and monitoring of open clusters, and a globular cluster. These projects have all defeated the initial technical challenge, but a new obstacle has risen in its place: Single-color photometric time series are not sufficient to identify uniquely transiting planet systems, as eclipsing binary stars can mimic the signal. Multicolor photometric time series and multi-epoch spectroscopic monitoring are required to cull the list of candidates prior to high-precision radial velocity monitoring. I also discuss the prospects for detecting another transiting system among the planets found by the radial-velocity method, as well as review the recent announcement of OGLE-TR-56b, the first extrasolar planet detected by the transit method.

  14. Transitions : a sanatorium on the seaside

    E-Print Network [OSTI]

    Hermida Rodríguez, Belén

    1988-01-01

    This thesis is about transitions: from sea to hill, from harbour to town, from illness to wellness, from life to death; it is about the passage of time. I chose a dramatic site, in the village where I have spent the past ...

  15. Paying for transit operations : challenges and solutions for the Chicago Transit Authority

    E-Print Network [OSTI]

    Kirschbaum, Julie B

    2004-01-01

    This research identifies the challenges Chicagoland must confront to maintain a quality transit system. It analyzes the organizational and funding structure of the Regional Transportation Authority and its three service ...

  16. SunLine Transit Agency Hydrogen-Powered Transit Buses: Third Evaluation Report (Report and Appendices)

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2008-06-01

    This report describes operations at SunLine Transit Agency for a protoype fuel cell bus, a prototype hydrogen hybrid interal combustion engine bus, and five new compressed natural gas buses.

  17. SunLine Transit Agency Hydrogen-Powered Transit Buses: Evaluation...

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

    Results Update This report provides an update on the evaluation results for hydrogen and CNG-fueled buses opertating at SunLine Transit Agency in California. 42080.pdf More...

  18. There's no justice in transit! : transit equity, land use, and air quality in Boston

    E-Print Network [OSTI]

    Machala, Laura Beth

    2007-01-01

    As a result of air pollution created by the Central Artery/Tunnel Project (CA/T), aka "the Big Dig," transit and other air quality mitigation projects were incorporated into the State Implementation Plan (SIP). The SIP is ...

  19. King County Metro Transit Hybrid Articulated Transit Buses: Interim Evaluation Results

    SciTech Connect (OSTI)

    Chandler, K.; Walkowicz, K.

    2006-04-01

    Interim technical report compares and evaluates new diesel and diesel hybrid-electric articulated buses operated as part of the King County Metro Transit (KC Metro) fleet in Seattle, Washington.

  20. SunLine Transit Agency Fuel Cell Transit Bus: Fifth Evaluation...

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

    at SunLine Transit Agency for a prototype fuel cell bus and five compressed natural gas (CNG) buses. This is the fifth evaluation report for this site, and it describes results and...

  1. Thermal Transitions in Layer-By-Layer Assemblies 

    E-Print Network [OSTI]

    Sung, Choonghyun

    2014-10-13

    Thermal transitions in layer-by-layer (LbL) assemblies were investigated under dry and hydrated conditions. In the dry state, the effects of film thickness and the film deposition method on the glass transition temperature (Tg) were studied...

  2. A Super-Earth Transiting a Naked-Eye Star

    E-Print Network [OSTI]

    Winn, Joshua Nathan

    We have detected transits of the innermost planet "e" orbiting 55 Cnc (V = 6.0), based on two weeks of nearly continuous photometric monitoring with the MOST space telescope. The transits occur with the period (0.74 days) ...

  3. Extrasolar planet transit photometry at Wallace Astrophysical Observatory

    E-Print Network [OSTI]

    Fong, Wen-fai

    2008-01-01

    Extrasolar planet transit photometry is a relatively new astronomical technique developed over the past decade. Transit photometry is the measurement of a star's brightness as an orbiting planet passes in front of the star ...

  4. Assisting Transit Agencies with Natural Gas Bus Technologies

    SciTech Connect (OSTI)

    Not Available

    2005-04-01

    A 2-page fact sheet summarizing the U.S. Department of Energy Natural Gas Transit Users Group, which provides assistance to transit agencies implementing natural gas vehicles into their fleets.

  5. Regional parking fee : a potential funding source for transit?

    E-Print Network [OSTI]

    Misiak, Jodie Mercer

    2005-01-01

    From a regional mobility perspective, Chicagoland is in serious trouble. The current Chicago Transit Authority (CTA) funding shortfall is just the most recent evidence of major flaws in the region's transit governance and ...

  6. Generalizing power transitions as a cause of war

    E-Print Network [OSTI]

    Fogg, Erik (Erik D.)

    2009-01-01

    In this thesis, I ask three questions about the nature of power transition theory. First, I ask whether power transition theory can be generalized beyond identification of great powers or regional hierarchies. Lemke and ...

  7. Measuring Cost Variability in Provision of Transit Service

    E-Print Network [OSTI]

    Taylor, Brian D.; Garrett, Mark; Iseki, Hiroyuki

    2010-01-01

    W. , and S. R. Mundle. Peak-Base Cost Allocation Models. In29–33. Reilly, J. M. Transit Costs During Peak and Off-PeakHow to Allocate Bus Route Costs. Transit, Vol. 5, No. 2,

  8. Tuning of the Metal-Insulator Transition via Alkali Adsorption

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

    Tuning of the Metal-Insulator Transition via Alkali Adsorption Tuning of the Metal-Insulator Transition via Alkali Adsorption Print Wednesday, 29 March 2006 00:00 Turning a...

  9. Site Transition Process upon Completion of the Cleanup Mission...

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

    Site Transition Summary: Cleanup Completion to Long-Term Stewardship at Department of Energy On-going Mission Sites Site Transition Summary: Clean-up Completion to Long Term...

  10. Recommendation 198: Establish a site transition process | Department...

    Office of Environmental Management (EM)

    8: Establish a site transition process Recommendation 198: Establish a site transition process The recommendation asks that DOE EM develop a fact sheet, similar to one done by the...

  11. The Iron Spin Transition in the Earth's Lower Mantle

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

    Transition in the Earth's Lower Mantle Print It is now known that the iron present in minerals of the lower mantle of the Earth undergoes a pressure-induced transition with pairing...

  12. Which way is up : towards accessible wayfinding in transit stations

    E-Print Network [OSTI]

    Leven, Dalia (Dalia Beth)

    2006-01-01

    Passengers' most frequent interaction with a rail transit system is at its stations, which represent the beginning, the end and sometimes the middle of transit trips. The design of these stations can greatly affect a user's ...

  13. Hydrocarbon-free resonance transition 795 nm rubidium laser

    E-Print Network [OSTI]

    Wu, Sheldon Shao Quan

    2009-01-01

    and R. J. Beach, "Hydrocarbon-free resonance transition 795-a Reliable Diode-Pumped Hydrocarbon-Free 795-nm Rubidiumand R. J. Beach, "Hydrocarbon-free resonance transition 795-

  14. MTA New York City Transit: Diesel Hybrid Electric Buses

    SciTech Connect (OSTI)

    Not Available

    2003-03-01

    Fact sheet describes the performance of diesel hybrid electric buses used at MTA New York City Transit.

  15. Transportation Center Seminar........ "Flexible Transit for Low-Density Communities"

    E-Print Network [OSTI]

    Bustamante, Fabián E.

    of both fixed-route and demand-responsive transit. Once stops are identified, vehicle tours using actual

  16. Lean Transition of Emerging Industrial Capability (LeanTEC)

    E-Print Network [OSTI]

    Shroyer, E.

    Lean Transition of Emerging Industrial Capability (LeanTEC) program was a cooperative agreement between the Boeing Company

  17. Seismic Amplitude Versus Offset (AVO) Character of Geopressured Transition Zones

    E-Print Network [OSTI]

    on well logs from sealed transitions n demonstrate their unusual AVO character. A long-offset COCORP

  18. Transits of planets with small intervals in circumbinary systems

    SciTech Connect (OSTI)

    Liu, Hui-Gen; Wang, Ying; Zhang, Hui; Zhou, Ji-Lin

    2014-08-01

    Transit times around single stars can be described well by a linear ephemeris. However, transit times in circumbinary systems are influenced both by the gravitational perturbations and the orbital phase variations of the central binary star. Adopting a coplanar analog of Kepler-16 as an example, we find that circumbinary planets can transit the same star more than once during a single planetary orbit, a phenomenon we call 'tight transits.' In certain geometric architecture, the projected orbital velocity of the planet and the secondary star can approach zero and change sign, resulting in very long transits and/or 2-3 transits during a single binary orbit. Whether tight transits are possible for a particular system depends primarily on the binary mass ratio and the orbital architecture of both the binary and the planet. We derive a time-dependent criterion to judge when tight transits are possible for any circumbinary system. These results are verified with full dynamical integrations that also reveal other tight transit characteristics, i.e., the transit durations and the intervals between tight transits. For the seven currently known circumbinary systems, we estimate these critical parameters both analytically and numerically. Due to the mutual inclination between the planet and the binary, tight transits can only occur across the less massive star B in Kepler-16, -34, -35, and -47 (for both planets). The long-term average frequency of tight transits (compared to typical transits) for Kepler-16, -34, and -35 are estimated to be several percent. Using full numerical integrations, the next tight transit for each system is predicted and the soonest example appears to be Kepler-47b and -47c, which are likely to have tight transits before 2025. These unique and valuable events often deserve special observational scrutiny.

  19. Controlled transitions between cupolets of chaotic systems

    SciTech Connect (OSTI)

    Morena, Matthew A. Short, Kevin M.; Cooke, Erica E.

    2014-03-15

    We present an efficient control scheme that stabilizes the unstable periodic orbits of a chaotic system. The resulting orbits are known as cupolets and collectively provide an important skeleton for the dynamical system. Cupolets exhibit the interesting property that a given sequence of controls will uniquely identify a cupolet, regardless of the system's initial state. This makes it possible to transition between cupolets, and thus unstable periodic orbits, simply by switching control sequences. We demonstrate that although these transitions require minimal controls, they may also involve significant chaotic transients unless carefully controlled. As a result, we present an effective technique that relies on Dijkstra's shortest path algorithm from algebraic graph theory to minimize the transients and also to induce certainty into the control of nonlinear systems, effectively providing an efficient algorithm for the steering and targeting of chaotic systems.

  20. Sunspot transition region oscillations in NOAA 8156

    E-Print Network [OSTI]

    N. Brynildsen; T. Leifsen; O. Kjeldseth-Moe; P. Maltby; K. Wilhelm

    1998-12-01

    Based on observations obtained with the Solar and Heliospheric Observatory - SOHO joint observing program for velocity fields in sunspot regions, we have detected 3 min transition region umbral oscillations in NOAA 8156. Simultaneous recordings of O V $\\lambda$629 and N V $\\lambda$1238, $\\lambda$1242 with the SUMER instrument give the spatial distribution of power in the 3 min oscillations, both in intensity and line-of-sight velocity. Comparing loci with the same phase we find that the entire umbral transition region oscillates. The observed maxima in peak line intensity are nearly in phase with the maxima in velocity directed towards the observer. We discuss the suggestion that the waves are upward propagating acoustic waves.

  1. Analog E1 transitions and isospin mixing

    SciTech Connect (OSTI)

    Pattabiraman, N. S.; Jenkins, D. G.; Bentley, M. A.; Wadsworth, R.; Lister, C. J.; Carpenter, M. P.; Janssens, R. V. F.; Khoo, T. L.; Lauritsen, T.; Seweryniak, D.; Zhu, S.; Lotay, G.; Woods, P. J.; Krishichayan,; Isacker, P. Van [Department of Physics, University of York, Heslington, York YO10 5DD (United Kingdom); Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom); UGC-DAE CSR, Kolkata 700 098 (India); Grand Accelerateur National d'Ions Lourds, CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 5 (France)

    2008-08-15

    We investigate whether isospin mixing can be determined in a model-independent way from the relative strength of E1 transitions in mirror nuclei. The specific examples considered are the A=31 and A=35 mirror pairs, where a serious discrepancy between the strengths of 7/2{sup -}{yields}5/2{sup +} transitions in the respective mirror nuclei has been observed. A theoretical analysis of the problem suggests that it ought to be possible to disentangle the isospin mixing in the initial and final states given sufficient information on experimental matrix elements. With this in mind, we obtain a lifetime for the relevant 7/2{sup -} state in {sup 31}S using the Doppler-shift attenuation method. We then collate the available information on matrix elements to examine the level of isospin mixing for both A=31 and A=35 mirror pairs.

  2. Transition asymptotics for the Painlevé II transcendent

    E-Print Network [OSTI]

    Thomas Bothner

    2015-02-26

    We consider real-valued solutions $u=u(x|s),x\\in\\mathbb{R}$ of the second Painlev\\'e equation $u_{xx}=xu+2u^3$ which are parametrized in terms of the monodromy data $s\\equiv(s_1,s_2,s_3)\\subset\\mathbb{C}^3$ of the associated Flaschka-Newell system of rational differential equations. Our analysis describes the transition, as $x\\rightarrow-\\infty$, between the oscillatory power-like decay asymptotics for $|s_1|1$ (Kapaev). It is shown that the transition asymptotics are of Boutroux type, i.e. they are expressed in terms of Jacobi elliptic functions. As applications of our results we obtain asymptotics for the Airy kernel determinant $\\det(I-\\gamma K_{\\textnormal{Ai}})|_{L^2(x,\\infty)}$ in a double scaling limit $x\\rightarrow-\\infty,\\gamma\\uparrow 1$ as well as asymptotics for the spectrum of $K_{\\textnormal{Ai}}$.

  3. The Dynamic Transition of Protein Hydration Water

    E-Print Network [OSTI]

    W. Doster; S. Busch; A. M. Gaspar; M. -S. Appavou; J. Wuttke; H. Scheer

    2010-02-12

    Thin layers of water on biomolecular and other nanostructured surfaces can be supercooled to temperatures not accessible with bulk water. Chen et al. [PNAS 103, 9012 (2006)] suggested that anomalies near 220 K observed by quasi-elastic neutron scattering can be explained by a hidden critical point of bulk water. Based on more sensitive measurements of water on perdeuterated phycocyanin, using the new neutron backscattering spectrometer SPHERES, and an improved data analysis, we present results that show no sign of such a fragile-to-strong transition. The inflection of the elastic intensity at 220 K has a dynamic origin that is compatible with a calorimetric glass transition at 170 K. The temperature dependence of the relaxation times is highly sensitive to data evaluation; it can be brought into perfect agreement with the results of other techniques, without any anomaly.

  4. Phase transitions in Pareto optimal complex networks

    E-Print Network [OSTI]

    Seoane, Luís F

    2015-01-01

    The organization of interactions in complex systems can be described by networks connecting different units. These graphs are useful representations of the local and global complexity of the underlying systems. The origin of their topological structure can be diverse, resulting from different mechanisms including multiplicative processes and optimization. In spatial networks or in graphs where cost constraints are at work, as it occurs in a plethora of situations from power grids to the wiring of neurons in the brain, optimization plays an important part in shaping their organization. In this paper we study network designs resulting from a Pareto optimization process, where different simultaneous constraints are the targets of selection. We analyze three variations on a problem finding phase transitions of different kinds. Distinct phases are associated to different arrangements of the connections; but the need of drastic topological changes does not determine the presence, nor the nature of the phase transit...

  5. Electronic structure and transition energies in polymer-fullerene bulk heterojunctions

    E-Print Network [OSTI]

    2014-01-01

    Electronic Structure and Transition Energies in Polymer?the HOMO and LUMO energy levels and transition energies haveand charge-transfer transition energies. The interface band

  6. New York City Transit Diesel Hybrid-Electric Buses Final Results...

    Open Energy Info (EERE)

    New York City Transit Diesel Hybrid-Electric Buses Final Results: DOE NREL Transit Bus Evaluation Project Jump to: navigation, search Name New York City Transit Diesel...

  7. Advanced Reactors Transition Program Resource Loaded Schedule

    SciTech Connect (OSTI)

    GANTT, D.A.

    2000-01-12

    The Advanced Reactors Transition (ART) Resource Loaded Schedule (RLS) provides a cost and schedule baseline for managing the project elements within the ART Program. The Fast Flux Test Facility (FETF) activities are delineated through the end of FY 2000, assuming continued standby. The Nuclear Energy (NE) Legacies and Plutonium Recycle Test Reactor (PRTR) activities are delineated through the end of the deactivation process. This revision reflects the 19 Oct 1999 baseline.

  8. Single-layer transition metal sulfide catalysts

    DOE Patents [OSTI]

    Thoma, Steven G. (Albuquerque, NM)

    2011-05-31

    Transition Metal Sulfides (TMS), such as molybdenum disulfide (MoS.sub.2), are the petroleum industry's "workhorse" catalysts for upgrading heavy petroleum feedstocks and removing sulfur, nitrogen and other pollutants from fuels. We have developed an improved synthesis technique to produce SLTMS catalysts, such as molybdenum disulfide, with potentially greater activity and specificity than those currently available. Applications for this technology include heavy feed upgrading, in-situ catalysis, bio-fuel conversion and coal liquefaction.

  9. Metric Signature Transitions in Optical Metamaterials

    E-Print Network [OSTI]

    Igor I. Smolyaninov; Evgenii E. Narimanov

    2010-07-07

    We demonstrate that the extraordinary waves in indefinite metamaterials experience (- - + +) effective metric signature. During a metric signature change transition in such a metamaterial, a Minkowski space-time is "created" together with large number of particles populating this space-time. Such metamaterial models provide a table top realization of metric signature change events suggested to occur in Bose-Einstein condensates and quantum gravity theories.

  10. Measurement of the ??*?? and ??*??' transition form factors

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

    del Amo Sanchez, P.; Lees, J. P.; Poireau, V.; Prencipe, E.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Martinelli, M.; Milanes, D. A.; Palano, A.; et al

    2011-09-06

    We study the reactions e?e??e?e??(') in the single-tag mode and measure the ??*??(') transition form factors in the momentum-transfer range from 4 to 40 GeV². The analysis is based on 469 fb?¹ of integrated luminosity collected at PEP-II with the BABAR detector at e?e? center-of-mass energies near 10.6 GeV.

  11. Matrix Product States and Quantum Phase Transitions

    E-Print Network [OSTI]

    K. Heshami; S. Raeisi

    2009-09-16

    We have developed a new approach based on matrix product representations of ground states to study Quantum Phase Transitions (QPT). As confirmation of the power of our approach we have analytically analyzed the XXZ spin-one chain with uniaxial single-ion-type anisotropy and our results compare favourably with previous numerical studies. In addition, our description lets to know which part of parameters space of the Hamiltonian is most likely to be exactly solvable.

  12. Casimir energy and the superconducting phase transition

    E-Print Network [OSTI]

    Giuseppe Bimonte; Enrico Calloni; Giampiero Esposito; Luigi Rosa

    2006-01-24

    We study the influence of Casimir energy on the critical field of a superconducting film, and we show that by this means it might be possible to directly measure, for the first time, the variation of Casimir energy that accompanies the superconducting transition. It is shown that this novel approach may also help clarifying the long-standing controversy on the contribution of TE zero modes to the Casimir energy in real materials.

  13. Measurement of the ??*?? and ??*??' transition form factors

    SciTech Connect (OSTI)

    del Amo Sanchez, P.; Lees, J. P.; Poireau, V.; Prencipe, E.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Martinelli, M.; Milanes, D. A.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu.?G.; Lynch, G.; Osipenkov, I. L.; Koch, H.; Schroeder, T.; Asgeirsson, D. J.; Hearty, C.; Mattison, T. S.; McKenna, J. A.; Khan, A.; Blinov, V. E.; Botov, A. A.; Buzykaev, A. R.; Druzhinin, V. P.; Golubev, V. B.; Kravchenko, E. A.; Onuchin, A. P.; Serednyakov, S. I.; Skovpen, Yu.?I.; Solodov, E. P.; Todyshev, K.?Yu.; Yushkov, A. N.; Bondioli, M.; Curry, S.; Kirkby, D.; Lankford, A. J.; Mandelkern, M.; Martin, E. C.; Stoker, D. P.; Atmacan, H.; Gary, J. W.; Liu, F.; Long, O.; Vitug, G. M.; Campagnari, C.; Hong, T. M.; Kovalskyi, D.; Richman, J. D.; West, C. A.; Eisner, A. M.; Heusch, C. A.; Kroseberg, J.; Lockman, W. S.; Martinez, A. J.; Schalk, T.; Schumm, B. A.; Seiden, A.; Winstrom, L. O.; Cheng, C. H.; Doll, D. A.; Echenard, B.; Hitlin, D. G.; Ongmongkolkul, P.; Porter, F. C.; Rakitin, A. Y.; Andreassen, R.; Dubrovin, M. S.; Meadows, B. T.; Sokoloff, M. D.; Bloom, P. C.; Ford, W. T.; Gaz, A.; Nagel, M.; Nauenberg, U.; Smith, J. G.; Wagner, S. R.; Ayad, R.; Toki, W. H.; Jasper, H.; Petzold, A.; Spaan, B.; Kobel, M. J.; Schubert, K. R.; Schwierz, R.; Bernard, D.; Verderi, M.; Clark, P. J.; Playfer, S.; Watson, J. E.; Andreotti, M.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cecchi, A.; Cibinetto, G.; Fioravanti, E.; Franchini, P.; Garzia, I.; Luppi, E.; Munerato, M.; Negrini, M.; Petrella, A.; Piemontese, L.; Baldini-Ferroli, R.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Nicolaci, M.; Pacetti, S.; Patteri, P.; Peruzzi, I. M.; Piccolo, M.; Rama, M.; Zallo, A.; Contri, R.; Guido, E.; Lo Vetere, M.; Monge, M. R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Bhuyan, B.; Prasad, V.; Lee, C. L.; Morii, M.; Edwards, A. J.; Adametz, A.; Marks, J.; Uwer, U.; Bernlochner, F. U.; Ebert, M.; Lacker, H. M.; Lueck, T.; Volk, A.; Dauncey, P. D.; Tibbetts, M.; Behera, P. K.; Mallik, U.; Chen, C.; Cochran, J.; Crawley, H. B.; Meyer, W. T.; Prell, S.; Rosenberg, E. I.; Rubin, A. E.; Gritsan, A. V.; Guo, Z. J.; Arnaud, N.; Davier, M.; Derkach, D.; Firmino da Costa, J.; Grosdidier, G.; Le Diberder, F.; Lutz, A. M.; Malaescu, B.; Perez, A.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wang, L.; Wormser, G.; Lange, D. J.; Wright, D. M.; Bingham, I.; Chavez, C. A.; Coleman, J. P.; Fry, J. R.; Gabathuler, E.; Hutchcroft, D. E.; Payne, D. J.; Touramanis, C.; Bevan, A. J.; Di Lodovico, F.; Sacco, R.; Sigamani, M.; Cowan, G.; Paramesvaran, S.; Wren, A. C.; Brown, D. N.; Davis, C. L.; Denig, A. G.; Fritsch, M.; Gradl, W.; Hafner, A.; Alwyn, K. E.; Bailey, D.; Barlow, R. J.; Jackson, G.; Lafferty, G. D.; Anderson, J.; Cenci, R.; Jawahery, A.; Roberts, D. A.; Simi, G.; Tuggle, J. M.; Dallapiccola, C.; Salvati, E.; Cowan, R.; Dujmic, D.; Sciolla, G.; Zhao, M.; Lindemann, D.; Patel, P. M.; Robertson, S. H.; Schram, M.; Biassoni, P.; Lazzaro, A.; Lombardo, V.; Palombo, F.; Stracka, S.; Cremaldi, L.; Godang, R.; Kroeger, R.; Sonnek, P.; Summers, D. J.; Nguyen, X.; Simard, M.; Taras, P.; De Nardo, G.; Monorchio, D.; Onorato, G.; Sciacca, C.; Raven, G.; Snoek, H. L.; Jessop, C. P.; Knoepfel, K. J.; LoSecco, J. M.; Wang, W. F.; Corwin, L. A.; Honscheid, K.; Kass, R.; Blount, N. L.; Brau, J.; Frey, R.; Igonkina, O.; Kolb, J. A.; Rahmat, R.; Sinev, N. B.; Strom, D.; Strube, J.; Torrence, E.; Castelli, G.; Feltresi, E.; Gagliardi, N.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simonetto, F.; Stroili, R.; Ben-Haim, E.; Bomben, M.; Bonneaud, G. R.; Briand, H.; Calderini, G.; Chauveau, J.; Hamon, O.; Leruste, Ph.; Marchiori, G.; Ocariz, J.; Prendki, J.; Sitt, S.; Biasini, M.; Manoni, E.; Rossi, A.; Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Casarosa, G.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Neri, N.; Paoloni, E.; Rizzo, G.; Walsh, J. J.; Lopes Pegna, D.; Lu, C.; Olsen, J.; Smith, A. J. S.; Telnov, A. V.; Anulli, F.; Baracchini, E.; Cavoto, G.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Li Gioi, L.; Mazzoni, M. A.; Piredda, G.; Renga, F.; Buenger, C.; Hartmann, T.; Leddig, T.; Schröder, H.; Waldi, R.; Adye, T.; Olaiya, E. O.; Wilson, F. F.; Emery, S.; Hamel de Monchenault, G.; Vasseur, G.; Yèche, Ch.; Allen, M. T.; Aston, D.; Bard, D. J.; Bartoldus, R.; Benitez, J. F.; Cartaro, C.; Convery, M. R.; Dorfan, J.; Dubois-Felsmann, G. P.; Dunwoodie, W.; Field, R. C.; Franco Sevilla, M.; Fulsom, B. G.; Gabareen, A. M.; Graham, M. T.; Grenier, P.; Hast, C.; Innes, W. R.; Kelsey, M. H.; Kim, H.; Kim, P.; Kocian, M. L.; Leith, D. W. G. S.; Lewis, P.; Li, S.; Lindquist, B.; Luitz, S.; Luth, V.; Lynch, H. L.

    2011-09-06

    We study the reactions e?e??e?e??(') in the single-tag mode and measure the ??*??(') transition form factors in the momentum-transfer range from 4 to 40 GeV². The analysis is based on 469 fb?¹ of integrated luminosity collected at PEP-II with the BABAR detector at e?e? center-of-mass energies near 10.6 GeV.

  14. Hydrogen Transition (HyTRANS) Model

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing Tool Fits the Bill FinancingDepartmentDatabase Demonstration HydrogenClean CoalTransition

  15. Energy Transition Initiative | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center HomeVehicleDepartmentMedia Advisories EnergyEnergy Transition

  16. Generalized simulated tempering for exploring strong phase transitions Jaegil Kima

    E-Print Network [OSTI]

    Straub, John E.

    rapid convergence. Accelerated tunneling transitions with a comprehensive sampling for phaseGeneralized simulated tempering for exploring strong phase transitions Jaegil Kima and John E to the exploration of first-order phase transition systems characterized by the backbending or S

  17. Willamette River Transit Bridge PSU CTS Seminar January 16, 2009

    E-Print Network [OSTI]

    Bertini, Robert L.

    Willamette River Transit Bridge PSU CTS Seminar January 16, 2009 Dave Unsworth, TriMet Guenevere River Transit Bridge · Portland-Milwaukie Light Rail Project · Plans for a new Willamette River Bridge · Public Process Today's Agenda #12;Willamette River Transit BridgePortland-Milwaukie Light Rail Project

  18. On Landau Theory and Symmetric Energy Landscapes for Phase Transitions

    E-Print Network [OSTI]

    Hormann, Kai

    On Landau Theory and Symmetric Energy Landscapes for Phase Transitions Kai Hormann Department the global complex energy landscapes of phase transitions. For the sake of clarity and brevity the exposition-to-monoclinic transition in CuZnAl. The resulting energies are defined globally, in a piecewise manner. We use splines

  19. CIPT: Using Tuangou to Reduce IP Transit Costs Rade Stanojevic

    E-Print Network [OSTI]

    Gorinsky, Sergey

    transit links. In- tuitively, the less traffic of an ISP flows through those links, the lower the costCIPT: Using Tuangou to Reduce IP Transit Costs Rade Stanojevic Ignacio Castro Sergey Gorinsky prices per Mbps de- cline steadily, the overall transit costs of these ISPs remain high or even increase

  20. Factors Influencing Productivity and Operating Cost of Demand Responsive Transit

    E-Print Network [OSTI]

    Dessouky, Maged

    Factors Influencing Productivity and Operating Cost of Demand Responsive Transit Kurt Palmer Maged of the Americans with Disabilities Act in 1991 operating expenses for Demand Responsive Transit have more than and practices upon productivity and operating cost. ii #12;1 Introduction Demand Responsive Transit (DRT

  1. Transition to smart card technology : how transit operators can encourage the take-up of smart card technology

    E-Print Network [OSTI]

    Hong, Yi, S.M. Massachusetts Institute of Technology

    2006-01-01

    This thesis explores and evaluates the essential strategies needed for transit agencies to switch from traditional fare collection systems to smart cards. More transit agencies today are investing in smart card technology ...

  2. The Effects of Parental Knowledge about the Transition Process: Does it Predict Agency Usage and Transition Outcomes? 

    E-Print Network [OSTI]

    Duran, Jaime B

    2013-12-06

    with Disabilities Education Act emphasizes the importance of parental participation in the transition process, parents report that they are not knowledgeable about the transition process or options for post school services. Due to the complex needs of individuals...

  3. Equivalence of Glass Transition and Colloidal Glass Transition in the Hard-Sphere Limit Thomas K. Haxton,2

    E-Print Network [OSTI]

    Weeks, Eric R.

    Equivalence of Glass Transition and Colloidal Glass Transition in the Hard-Sphere Limit Ning Xu,1 that the slowing of the dynamics in simulations of several model glass-forming liquids is equivalent to the hard-sphere glass transition in the low-pressure limit. In this limit, we find universal behavior of the relaxation

  4. Glass transitions in two-dimensional suspensions of colloidal ellipsoids

    E-Print Network [OSTI]

    Zhongyu Zheng; Feng Wang; Yilong Han

    2011-05-29

    We observed a two-step glass transition in monolayers of colloidal ellipsoids by video microscopy. The glass transition in the rotational degree of freedom was at a lower density than that in the translational degree of freedom. Between the two transitions, ellipsoids formed an orientational glass. Approaching the respective glass transitions, the rotational and translational fastest-moving particles in the supercooled liquid moved cooperatively and formed clusters with power-law size distributions. The mean cluster sizes diverge in power law as approaching the glass transitions. The clusters of translational and rotational fastest-moving ellipsoids formed mainly within pseudo-nematic domains, and around the domain boundaries, respectively.

  5. Quantum phase transitions in Bose-Fermi systems

    SciTech Connect (OSTI)

    Petrellis, D.; Leviatan, A.; Iachello, F.

    2011-04-15

    Research Highlights: > We study quantum phase transitions in a system of N bosons and a single-j fermion. > Classical order parameters and correlation diagrams of quantum levels are determined. > The odd fermion strongly influences the location and nature of the phase transition. > Experimental evidence for the U(5)-SU(3) transition in odd-even nuclei is presented. - Abstract: Quantum phase transitions in a system of N bosons with angular momentum L = 0, 2 (s, d) and a single fermion with angular momentum j are investigated both classically and quantum mechanically. It is shown that the presence of the odd fermion strongly influences the location and nature of the phase transition, especially the critical value of the control parameter at which the phase transition occurs. Experimental evidence for the U(5)-SU(3) (spherical to axially-deformed) transition in odd-even nuclei is presented.

  6. Continuity of states between the cholesteric ? line hexatic transition and the condensation transition in DNA solutions

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

    Yasar, Selcuk; Podgornik, Rudolf; Valle-Orero, Jessica; Johnson, Mark R.; Parsegian, V. Adrian

    2014-11-05

    A new method of finely temperature-tuning osmotic pressure allows one to identify the cholesteric ? line hexatic transition of oriented or unoriented long-fragment DNA bundles in monovalent salt solutions as first order, with a small but finite volume discontinuity. This transition is similar to the osmotic pressure-induced expanded ? condensed DNA transition in polyvalent salt solutions at small enough polyvalent salt concentrations. Therefore there exists a continuity of states between the two. This finding with the corresponding empirical equation of state, effectively relates the phase diagram of DNA solutions for monovalent salts to that for polyvalent salts and sheds somemore »light on the complicated interactions between DNA molecules at high densities.« less

  7. Continuity of states between the cholesteric ? line hexatic transition and the condensation transition in DNA solutions

    SciTech Connect (OSTI)

    Yasar, Selcuk; Podgornik, Rudolf; Valle-Orero, Jessica; Johnson, Mark R.; Parsegian, V. Adrian

    2014-11-05

    A new method of finely temperature-tuning osmotic pressure allows one to identify the cholesteric ? line hexatic transition of oriented or unoriented long-fragment DNA bundles in monovalent salt solutions as first order, with a small but finite volume discontinuity. This transition is similar to the osmotic pressure-induced expanded ? condensed DNA transition in polyvalent salt solutions at small enough polyvalent salt concentrations. Therefore there exists a continuity of states between the two. This finding with the corresponding empirical equation of state, effectively relates the phase diagram of DNA solutions for monovalent salts to that for polyvalent salts and sheds some light on the complicated interactions between DNA molecules at high densities.

  8. Nucleon and $?$ elastic and transition form factors

    E-Print Network [OSTI]

    Jorge Segovia; Ian C. Cloet; Craig D. Roberts; Sebastian M. Schmidt

    2014-09-03

    We compute nucleon and Delta elastic and transition form factors, and compare predictions made using a framework built upon a Faddeev equation kernel and interaction vertices that possess QCD-like momentum dependence with results obtained using a vector-vector contact-interaction. The comparison emphasises that experiment is sensitive to the momentum dependence of the running couplings and masses in the strong interaction sector of the Standard Model and highlights that the key to describing hadron properties is a veracious expression of dynamical chiral symmetry breaking in the bound-state problem. Amongst the results we describe, the following are of particular interest: $G_E^p(Q^2)/G_M^p(Q^2)$ possesses a zero at $Q^2=9.5GeV^2$; any change in the interaction which shifts a zero in the proton ratio to larger $Q^2$ relocates a zero in $G_E^n(Q^2)/G_M^n(Q^2)$ to smaller $Q^2$; and there is likely a value of momentum transfer above which $G_E^n>G_E^p$. Regarding the $\\Delta(1232)$-baryon, we find that, inter alia: the electric monopole form factor exhibits a zero; the electric quadrupole form factor is negative, large in magnitude, and sensitive to the nature and strength of correlations in the $\\Delta(1232)$ Faddeev amplitude; and the magnetic octupole form factor is negative so long as rest-frame P- and D-wave correlations are included. In connection with the N-to-Delta transition, the momentum-dependence of the magnetic transition form factor, $G_M^\\ast$, matches that of $G_M^n$ once the momentum transfer is high enough to pierce the meson-cloud; and the electric quadrupole ratio is a keen measure of diquark and orbital angular momentum correlations.

  9. Electromagnetic Dipole Strength in Transitional Nuclei

    E-Print Network [OSTI]

    S. Q. Zhang; I. Bentley; S. Brant; F. Dönau; S. Frauendorf; B. Kämpfer; R. Schwengner; A. Wagner

    2008-08-19

    Electromagnetic dipole absorption cross-sections of transitional nuclei with large-amplitude shape fluctuations are calculated in a microscopic way by introducing the concept of Instantaneous Shape Sampling. The concept bases on the slow shape dynamics as compared to the fast dipole vibrations. The elctromagnetic dipole strength is calculated by means of RPA for the instantaneous shapes, the probability of which is obtained by means of IBA. Very good agreement with the experimental absorption cross sections near the nucleon emission threshold is obtained.

  10. Two glass transitions in miscible polymer blends?

    SciTech Connect (OSTI)

    Dudowicz, Jacek; Freed, Karl F.; Douglas, Jack F.

    2014-06-28

    In contrast to mixtures of two small molecule fluids, miscible binary polymer blends often exhibit two structural relaxation times and two glass transition temperatures. Qualitative explanations postulate phenomenological models of local concentration enhancements due to chain connectivity in ideal, fully miscible systems. We develop a quantitative theory that explains qualitative trends in the dynamics of real miscible polymer blends which are never ideal mixtures. The theory is a synthesis of the lattice cluster theory of blend thermodynamics, the generalized entropy theory for glass-formation in polymer materials, and the Kirkwood-Buff theory for concentration fluctuations in binary mixtures.

  11. Optical pumping via incoherent Raman transitions

    E-Print Network [OSTI]

    A. D. Boozer; R. Miller; T. E. Northup; A. Boca; H. J. Kimble

    2007-10-04

    A new optical pumping scheme is presented that uses incoherent Raman transitions to prepare a trapped Cesium atom in a specific Zeeman state within the 6S_{1/2}, F=3 hyperfine manifold. An important advantage of this scheme over existing optical pumping schemes is that the atom can be prepared in any of the F=3 Zeeman states. We demonstrate the scheme in the context of cavity quantum electrodynamics, but the technique is equally applicable to a wide variety of atomic systems with hyperfine ground-state structure.

  12. Transitioning from fossil-fueled to electrifie

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired SolarAbout / Transforming Y-12 Transforming Y-12Complex Transition

  13. Fuel Cells Technology Transit | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePowerEdistoWhiskeyFootprint VenturesColorado: EnergyFrontierTechnology Transit

  14. LTS Transition and Timeline - Hanford Site

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResource andfirstDevice UW Madison LineTransition and

  15. Fuel Cells in Transit Buses Transit buses are widely viewed as one of the best strategies for commercializing fuel cells for

    E-Print Network [OSTI]

    Fuel Cells in Transit Buses Summary Transit buses are widely viewed as one of the best strategies for commercializing fuel cells for vehicles and transitioning to a hydrogen economy. Many advantages have been identified regarding the use of transit buses as fuel cell platforms. For example: · Transit buses have well

  16. What is the probability of a thermodynamical transition?

    E-Print Network [OSTI]

    Álvaro M. Alhambra; Jonathan Oppenheim; Christopher Perry

    2015-04-07

    If the second law of thermodynamics forbids a transition from one state to another, then it is still possible to make the transition happen by using a sufficient amount of work. But if we do not have access to this amount of work, can the transition happen probabilistically? In the thermodynamic limit, this probability tends to zero, but here we find that for finite-sized systems, it can be finite. We compute the maximum probability of a transition or a thermodynamical fluctuation from any initial state to any final state, and show that this maximum can be achieved for any final state which is block-diagonal in the energy eigenbasis. We also find upper and lower bounds on this transition probability, in terms of the work of transition. As a bi-product, we introduce a finite set of thermodynamical monotones related to the thermo-majorization criteria which governs state transitions, and compute the work of transition in terms of them. The trade-off between the probability of a transition, and any partial work added to aid in that transition is also considered. Our results have applications in entanglement theory, and we find the amount of entanglement required (or gained) when transforming one pure entangled state into any other.

  17. Two-Photon Correlations in Atomic Transitions 

    E-Print Network [OSTI]

    Fry, Edward

    1973-01-01

    .143 0.049 0.037 0.033 0.0 0.0 0.0 0.0 Transition Jg-J-Jy 1/4 5/32 27/400 1957/33 600 -1/5 -1/8 -27/500 -1957/42 000 & (0) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.600 0.405 0.190 0.165 -0.750 -0.429 -0.171 -0.147 1/8 0.333 1... can be easily determined when the states in the transitions have J values 0, 1, 2, 3, 4, l/2, 3/2, 5/2, 7/2, or 9/2, and when the nuclear spin is 0, l, 1/2, 3/2, 5/2, 7/2, or 9/2. Experiments to test hidden-variable theories which are possible...

  18. Water Evaporation: A Transition Path Sampling Study

    E-Print Network [OSTI]

    Patrick Varilly; David Chandler

    2012-12-12

    We use transition path sampling to study evaporation in the SPC/E model of liquid water. Based on thousands of evaporation trajectories, we characterize the members of the transition state ensemble (TSE), which exhibit a liquid-vapor interface with predominantly negative mean curvature at the site of evaporation. We also find that after evaporation is complete, the distributions of translational and angular momenta of the evaporated water are Maxwellian with a temperature equal to that of the liquid. To characterize the evaporation trajectories in their entirety, we find that it suffices to project them onto just two coordinates: the distance of the evaporating molecule to the instantaneous liquid-vapor interface, and the velocity of the water along the average interface normal. In this projected space, we find that the TSE is well-captured by a simple model of ballistic escape from a deep potential well, with no additional barrier to evaporation beyond the cohesive strength of the liquid. Equivalently, they are consistent with a near-unity probability for a water molecule impinging upon a liquid droplet to condense. These results agree with previous simulations and with some, but not all, recent experiments.

  19. Physics with the ALICE Transition Radiation Detector

    E-Print Network [OSTI]

    Yvonne Pachmayer for the ALICE Collaboration

    2011-12-09

    The ALICE Transition Radiation Detector (TRD) significantly enlarges the scope of physics observables studied in ALICE, because it allows due to its electron identification capability to measure open heavy-flavour production and quarkonium states, which are essential probes to characterize the Quark-Gluon-Plasma created in nucleus-nucleus collisions at LHC. In addition the TRD enables to enhance rare probes due to its trigger contributions. We report on the first results of the electron identification capability of the ALICE Transition Radiation Detector (TRD) in pp collisions at $\\sqrt{s}$ = 7 TeV using a one-dimensional likelihood method on integrated charge measured in each TRD chamber. The analysis of heavy flavour production in pp collisions at $\\sqrt{s}$ = 7 TeV with this particle identification method, which extends the $p_{t}$ range of the existing measurement from $p_{t}$ = 4 GeV/c to 10 GeV/c and reduces the systematic uncertainty due to particle identification, is presented. The performance of the application of the TRD electron identification in the context of J/\\psi measurements in Pb-Pb collisions is also shown.

  20. Quasi-energy-independent solar neutrino transitions

    E-Print Network [OSTI]

    G. L. Fogli; E. Lisi; A. Palazzo

    2002-02-06

    Current solar, atmospheric, and reactor neutrino data still allow oscillation scenarios where the squared mass differences are all close to 10^-3 eV^2, rather than being hierarchically separated. For solar neutrinos, this situation (realized in the upper part of the so-called large-mixing angle solution) implies adiabatic transitions which depend weakly on the neutrino energy and on the matter density, as well as on the ``atmospheric'' squared mass difference. In such a regime of ``quasi-energy-independent'' (QEI) transitions, intermediate between the more familiar ``Mikheyev-Smirnov-Wolfenstein'' (MSW) and energy-independent (EI) regimes, we first perform analytical calculations of the solar nu_e survival probability at first order in the matter density, beyond the usual hierarchical approximations. We then provide accurate, generalized expressions for the solar neutrino mixing angles in matter, which reduce to those valid in the MSW, QEI and EI regimes in appropriate limits. Finally, a representative QEI scenario is discussed in some detail.

  1. Scaling theory for the jamming transition

    E-Print Network [OSTI]

    Carl P. Goodrich; Andrea J. Liu; James P. Sethna

    2015-10-12

    We propose a scaling ansatz for the elastic energy of a system near the critical jamming transition in terms of three relevant fields: the compressive strain $\\Delta \\phi$ relative to the critical jammed state, the shear strain $\\epsilon$, and the inverse system size $1/N$. We also use $\\Delta Z$, the number of contacts relative to the minimum required at jamming, as an underlying control parameter. Our scaling theory predicts new exponents, exponent equalities and scaling collapses for energy, pressure and shear stress that we verify with numerical simulations of jammed packings of soft spheres. It also yields new insight into why the shear and bulk moduli exhibit different scalings; the difference arises because the shear stress vanishes as $1/\\sqrt{N}$ while the pressure approaches a constant in the thermodynamic limit. The success of the scaling ansatz implies that the jamming transition exhibits an emergent scale invariance, and that it should be possible to develop a renormalization-group theory for jamming.

  2. SunLine Transit Agency Fuel Cell Transit Bus: Fourth Evaluation Report (Report and Appendices)

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2009-01-01

    This report describes operations at SunLine Transit Agency for a prototype fuel cell bus and five new compressed natural gas (CNG) buses. This is the fourth evaluation report for this site, and it describes results and experiences from April 2008 through October 2008. These results are an addition to those provided in the previous three evaluation reports.

  3. SunLine Transit Agency Fuel Cell Transit Bus: Fifth Evaluation Report (Report and Appendices)

    SciTech Connect (OSTI)

    Eudy, L.; Chandler, K.

    2009-08-01

    This report describes operations at SunLine Transit Agency for a prototype fuel cell bus and five compressed natural gas (CNG) buses. This is the fifth evaluation report for this site, and it describes results and experiences from October 2008 through June 2009. These results are an addition to those provided in the previous four evaluation reports.

  4. SunLine Transit Agency Fuel Cell Transit Bus: Fifth Evaluation Report-- Appendices

    Broader source: Energy.gov [DOE]

    This report describes operations at SunLine Transit Agency for a prototype fuel cell bus and five compressed natural gas (CNG) buses. This is the fifth evaluation report for this site, and it describes results and experiences from October 2008 through June 2009. These results are an addition to those provided in the previous four evaluation reports.

  5. Connecticut Transit (CTTRANSIT) Fuel Cell Transit Bus: Second Evaluation Report and Appendices

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2009-05-01

    This report describes operations at Connecticut Transit (CTTRANSIT) in Hartford for one prototype fuel cell bus and three new diesel buses operating from the same location. The evaluation period in this report (January 2008 through February 2009) has been chosen to coincide with a UTC Power propulsion system changeout that occurred on January 15, 2008.

  6. King County Metro Transit: Allison Hybrid Electric Transit Bus Laboratory Testing

    SciTech Connect (OSTI)

    Hayes, R. R.; Williams, A.; Ireland, J.; Walkowicz, K.

    2006-09-01

    Paper summarizes chassis dynamometer testing of two 60-foot articulated transit buses, one conventional and one hybrid, at NREL's ReFUEL Laboratory. It includes experimental setup, test procedures, and results from vehicle testing performed at the NREL ReFUEL laboratory.

  7. SunLine Transit Agency Fuel Cell Transit Bus: Fifth Evaluation Report

    Broader source: Energy.gov [DOE]

    This report describes operations at SunLine Transit Agency for a prototype fuel cell bus and five compressed natural gas (CNG) buses. This is the fifth evaluation report for this site, and it describes results and experiences from October 2008 through June 2009. These results are an addition to those provided in the previous four evaluation reports.

  8. Geometric Phase Transition: direct measurement of a mathematical abstraction

    E-Print Network [OSTI]

    Cavalcanti, D; Terra-Cunha, M O; Brand\\~ao, Fernando G.S.L.; Cavalcanti, Daniel; Cunha, Marcelo O. Terra

    2005-01-01

    Phase transition is a general phenomenon which occurs in different physical systems. It is characterized by a singular behavior of a state function. The standard example is the liquid-gas transition in fluids where a discontinuity in the density happens when the system reaches a critical temperature. Analogous situations can happen in quantum systems, a phenomenon called Quantum Phase Transitions. It has been widely discussed that entanglement plays a major role in quantum phase transitions and, in fact, this correlation can be viewed as a true order parameter in their characterization. Here we present a new kind of quantum phase transition that we term `geometric phase transition'. It happens whenever the set of quantum states presents a singular shape. We also show how this phenomenon allows a more accurate study regarding the geometry of the set of entangled states. Moreover we also show how this study can be made experimentally.

  9. Pressure induced phase transitions in ceramic compounds containing tetragonal zirconia

    SciTech Connect (OSTI)

    Sparks, R.G.; Pfeiffer, G.; Paesler, M.A.

    1988-12-01

    Stabilized tetragonal zirconia compounds exhibit a transformation toughening process in which stress applied to the material induces a crystallographic phase transition. The phase transition is accompanied by a volume expansion in the stressed region thereby dissipating stress and increasing the fracture strength of the material. The hydrostatic component of the stress required to induce the phase transition can be investigated by the use of a high pressure technique in combination with Micro-Raman spectroscopy. The intensity of Raman lines characteristic for the crystallographic phases can be used to calculate the amount of material that has undergone the transition as a function of pressure. It was found that pressures on the order of 2-5 kBar were sufficient to produce an almost complete transition from the original tetragonal to the less dense monoclinic phase; while a further increase in pressure caused a gradual reversal of the transition back to the original tetragonal structure.

  10. Transition-cost issues for a restructuring US electricity industry

    SciTech Connect (OSTI)

    NONE

    1997-03-01

    Utilities regulators can use a variety of approaches to calculate transition costs. We categorized these approaches along three dimensions. The first dimension is the use of administrative vs. market procedures to value the assets in question. Administrative approaches use analytical techniques to estimate transition costs. Market valuation relies on the purchase price of particular assets to determine their market values. The second dimension concerns when the valuation is done, either before or after the restructuring of the electricity industry. The third dimension concerns the level of detail involved in the valuation, what is often called top-down vs. bottom-up valuation. This paper discusses estimation approaches, criteria to assess estimation methods, specific approaches to estimating transition costs, factors that affect transition-cost estimates, strategies to address transition costs, who should pay transition costs, and the integration of cost recovery with competitive markets.

  11. Scale and electroweak first-order phase transitions

    E-Print Network [OSTI]

    Jisuke Kubo; Masatoshi Yamada

    2015-09-07

    We consider phase transitions in the standard model (SM) without the Higgs mass term, which is coupled through a Higgs portal term to an SM singlet, classically scale-invariant gauge sector with SM singlet scalar fields. At lower energies the gauge-invariant scalar bilinear in the hidden sector forms a condensate, dynamically creating a robust energy scale, which is transmitted through the Higgs portal term to the SM sector. A scale phase transition is a transition between phases with zero and nonzero condensates. An interplay between the EW and scale phase transitions is therefore expected. We find that in a certain parameter space both the electroweak (EW) and scale phase transitions can be a strong first-order phase transition. The result is obtained by means of an effective theory for the condensation of scalar bilinear in the mean field approximation.

  12. Quantum phase transition of condensed bosons in optical lattices

    E-Print Network [OSTI]

    Jun-Jun Liang; J. -Q. Liang; W. -M. Liu

    2004-03-23

    In this paper we study the superfluid-Mott-insulator phase transition of ultracold dilute gas of bosonic atoms in an optical lattice by means of Green function method and Bogliubov transformation as well. The superfluid- Mott-insulator phase transition condition is determined by the energy-band structure with an obvious interpretation of the transition mechanism. Moreover the superfluid phase is explained explicitly from the energy spectrum derived in terms of Bogliubov approach.

  13. BC Transit Fuel Cell Bus Project: Evaluation Results Report

    SciTech Connect (OSTI)

    Eudy, L.; Post, M.

    2014-02-01

    This report evaluates a fuel cell electric bus demonstration led by British Columbia Transit (BC Transit) in Whistler, Canada. BC Transit is collaborating with the California Air Resources Board and the U.S. Department of Energy's National Renewable Energy Laboratory to evaluate the buses in revenue service. This evaluation report covers two years of revenue service data on the buses from April 2011 through March 2013.

  14. Evolution of gravitational waves through the cosmological QCD transition

    E-Print Network [OSTI]

    Dominik J. Schwarz

    1998-11-06

    The spectrum of gravitational waves that have been produced in inflation is modified during cosmological transitions. Large drops in the number of relativistic particles, like during the QCD transition or at $e^+e^-$ annihilation, lead to steps in the spectrum of gravitational waves. We calculate the transfer function for the differential energy density of gravitational waves for a first-order and for a crossover QCD transition.

  15. Superfluid Phase Transition of Long-lifetime Polaritons | MIT...

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

    plasma and excitons, the Mott transition from exciton gas to electron-hole plasma and Bose-Einstein condensation of excitons and polaritons. His research group at the...

  16. Study of Alternative Approaches for Transite Panel Removal

    Broader source: Energy.gov [DOE]

    Bechtel Jacobs Company LLC (BJC) assembled an experienced team from both sites to evaluate both the manual and mechanical methods of transite panel removal.

  17. Leaf seal for transition duct in turbine system

    DOE Patents [OSTI]

    Flanagan, James Scott; LeBegue, Jeffrey Scott; McMahan, Kevin Weston; Dillard, Daniel Jackson; Pentecost, Ronnie Ray

    2013-06-11

    A turbine system is disclosed. In one embodiment, the turbine system includes a transition duct. The transition duct includes an inlet, an outlet, and a passage extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis. The outlet of the transition duct is offset from the inlet along the longitudinal axis and the tangential axis. The transition duct further includes an interface member for interfacing with a turbine section. The turbine system further includes a leaf seal contacting the interface member to provide a seal between the interface member and the turbine section.

  18. Selective gas adsorption and unique phase transition properties...

    Office of Scientific and Technical Information (OSTI)

    Selective gas adsorption and unique phase transition properties in a stable magnesium metal-organic framework constructed from infinite metal chains Citation Details In-Document...

  19. Mesoscale modeling of phase transition dynamics of thermoresponsive polymers

    E-Print Network [OSTI]

    Li, Zhen; Li, Xuejin; Karniadakis, George Em

    2015-01-01

    We present a non-isothermal mesoscopic model for investigation of the phase transition dynamics of thermoresponsive polymers. Since this model conserves energy in the simulations, it is able to correctly capture not only the transient behavior of polymer precipitation from solvent, but also the energy variation associated with the phase transition process. Simulations provide dynamic details of the thermally induced phase transition and confirm two different mechanisms dominating the phase transition dynamics. A shift of endothermic peak with concentration is observed and the underlying mechanism is explored.

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

    Open Energy Info (EERE)

    De Rocher, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Walker-Lane Transitional Zone Region (Shevenell & De Rocher,...

  1. Transition for Pantex and Y-12 Contract Completed | National...

    National Nuclear Security Administration (NNSA)

    Our Jobs Our Jobs Working at NNSA Blog Home Field Offices Welcome to the NNSA Production Office NPO News Releases Transition for Pantex and Y-12 Contract Completed...

  2. Updated Spitzer emission spectroscopy of bright transiting hot...

    Office of Scientific and Technical Information (OSTI)

    Updated Spitzer emission spectroscopy of bright transiting hot Jupiter HD 189733b Citation Details In-Document Search Title: Updated Spitzer emission spectroscopy of bright...

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

    Open Energy Info (EERE)

    Pritchett, 2004) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness...

  4. Electric and Magnetic Screening Masses around the Deconfinement Transition

    E-Print Network [OSTI]

    Attilio Cucchieri; Tereza Mendes

    2012-01-29

    We report on the status of our study of gluon propagators and screening masses around the de- confining transition for pure SU(2) gauge theory in Landau gauge.

  5. Flexible metallic seal for transition duct in turbine system

    SciTech Connect (OSTI)

    Flanagan, James Scott; LeBegue, Jeffrey Scott; McMahan, Kevin Weston; Dillard, Daniel Jackson; Pentecost, Ronnie Ray

    2014-04-22

    A turbine system is disclosed. In one embodiment, the turbine system includes a transition duct. The transition duct includes an inlet, an outlet, and a passage extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis. The outlet of the transition duct is offset from the inlet along the longitudinal axis and the tangential axis. The transition duct further includes an interface member for interfacing with a turbine section. The turbine system further includes a flexible metallic seal contacting the interface member to provide a seal between the interface member and the turbine section.

  6. Continuous and discontinuous dynamic unbinding transitions in drawn film flow

    E-Print Network [OSTI]

    M. Galvagno; D. Tseluiko; H. Lopez; U. Thiele

    2013-11-27

    When a plate is withdrawn from a liquid bath a coating layer is deposited whose thickness and homogeneity depend on the velocity and the wetting properties of the plate. Using a long-wave mesoscopic hydrodynamic description that incorporates wettability via a Derjaguin (disjoining) pressure we identify four qualitatively different dynamic transitions between microscopic and macroscopic coatings that are out-of-equilibrium equivalents of well known equilibrium unbinding transitions. Namely, these are continuous and discontinuous dynamic emptying transitions and discontinuous and continuous dynamic wetting transitions. We uncover several features that have no equivalent at equilibrium.

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

    Open Energy Info (EERE)

    Data Acquisition-Manipulation At Walker-Lane Transitional Zone Region (Coolbaugh, Et Al., 2005 - 2) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration...

  8. Optimized pulse sequences for suppressing unwanted transitions in quantum systems

    E-Print Network [OSTI]

    C. A. Schroeder; G. S. Agarwal

    2010-10-25

    We investigate the nature of the pulse sequence so that unwanted transitions in quantum systems can be inhibited optimally. For this purpose we show that the sequence of pulses proposed by Uhrig [Phys. Rev. Lett. \\textbf{98}, 100504 (2007)] in the context of inhibition of environmental dephasing effects is optimal. We derive exact results for inhibiting the transitions and confirm the results numerically. We posit a very significant improvement by usage of the Uhrig sequence over an equidistant sequence in decoupling a quantum system from unwanted transitions. The physics of inhibition is the destructive interference between transition amplitudes before and after each pulse.

  9. Transitioning to a Utility Funded Program Environment: What Do...

    Energy Savers [EERE]

    to a Utility Funded Program Environment: What Do I Need to Know? Program Sustainability Peer Exchange Call: Transitioning to a Utility Funded Program Environment: What Do...

  10. Hysteresis, phase transitions, and dangerous transients in electrical...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Hysteresis, phase transitions, and dangerous transients in electrical power distribution systems Citation Details In-Document Search Title: Hysteresis, phase...

  11. On transition from Alfvén resonance to forced magnetic reconnection

    SciTech Connect (OSTI)

    Luan, Q. [MOE Key Lab of Materials Modification by Beams and School of Physics and Optoelectrical Technology, Dalian University of Technology, Dalian 116024 (China); Wang, X., E-mail: xgwang@hit.edu.cn [Department of Physics, Harbin Institute of Technology, Harbin 150001 (China)

    2014-07-15

    We revisit the transition from Alfvén resonance to forced magnetic reconnection with a focus on the property of their singularities. As the driven frequency tends to zero, the logarithmic singularity of Alfvén resonance shifts to the power-law singularity of forced reconnection, due to merging of the two resonance layers. The transition criterion depends on either kinetic effects or dissipations that resolve the singularity. As an example, a small but finite resistivity ? is introduced to investigate the transition process. The transition threshold is then obtained as the driven frequency reaches a level of ?O((?/k){sup 1/3})

  12. DOE Hydrogen Transition Analysis Workshop | Department of Energy

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

    The U.S. Department of Energy sponsored a Hydrogen Transition Analysis Workshop in Washington, DC, on January 26, 2006. Attendees included automobile and energy company...

  13. Dynamic transitions of quasi-geostrophic channel flow.

    E-Print Network [OSTI]

    2015-09-21

    The main objective of this paper is to investigate the dynamic transition and the .... The quantity ? can be considered as a measure of the net mechanical energy.

  14. European Greenhouse Gas Emissions Trading: A System in Transition*

    E-Print Network [OSTI]

    European Greenhouse Gas Emissions Trading: A System in Transition* John M. Reilly and Sergey, and environmental effects. In turn, the greenhouse gas and atmospheric aerosol assumptions underlying climate

  15. Femtosecond NEXAFS of Photoinduced Insulator-Metal Transition...

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

    Femtosecond NEXAFS of Photoinduced Insulator-Metal Transition in VO2 Print The grand goal motivating femtosecond studies of condensed-matter dynamics is to directly measure the...

  16. Extraction of exchange parameters in transition-metal perovskites...

    Office of Scientific and Technical Information (OSTI)

    Extraction of exchange parameters in transition-metal perovskites Citation Details In-Document Search This content will become publicly available on September 14, 2016 Title:...

  17. Large kinetic asymmetry in the metal-insulator transition nucleated...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Large kinetic asymmetry in the metal-insulator transition nucleated at localized and extended defects Citation Details In-Document Search Title: Large kinetic...

  18. Synthesis and Characterization of a Novel Sodium Transition Metal...

    Office of Scientific and Technical Information (OSTI)

    Synthesis and Characterization of a Novel Sodium Transition Metal Oxyfluoride: NaMnMoOsubscript 3Fsubscript 3Hsubscript 2O Citation Details In-Document Search Title:...

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

    Open Energy Info (EERE)

    Direct-Current Resistivity Survey At Walker-Lane Transitional Zone Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  20. Nuclear Excitation by Electronic Transition of U-235

    E-Print Network [OSTI]

    Chodash, Perry Adam

    2015-01-01

    2.3 Nuclear Excitation by Electronic Transition Theory 2.41.2 Nuclear Nonproliferation . . . . . .M. B. Trzhaskovskaya, “Nuclear internal conversion between

  1. Optimized pulse sequences for suppressing unwanted transitions in quantum systems

    SciTech Connect (OSTI)

    Schroeder, C. A.; Agarwal, G. S. [Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440 W. Brooks St. Norman, Oklahoma 73019 (United States); Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078 (United States)

    2011-01-15

    We investigate the nature of the pulse sequence so that unwanted transitions in quantum systems can be inhibited optimally. For this purpose we show that the sequence of pulses proposed by Uhrig [Phys. Rev. Lett. 98, 100504 (2007)] in the context of inhibition of environmental dephasing effects is optimal. We derive exact results for inhibiting the transitions and confirm the results numerically. We posit a very significant improvement by usage of the Uhrig sequence over an equidistant sequence in decoupling a quantum system from unwanted transitions. The physics of inhibition is the destructive interference between transition amplitudes before and after each pulse.

  2. A Reversible Crystallinity-Preserving Phase Transition in Metal...

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

    Reversible Crystallinity-Preserving Phase Transition in Metal-Organic Frameworks: Discovery, Mechanistic Studies, and Potential Applications Previous Next List Liu, Dahuan; Liu,...

  3. Enabling a Transition to Low Carbon Economies in Developing Countries...

    Open Energy Info (EERE)

    Bangladesh Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Enabling a Transition to Low Carbon Economies in Developing Countries: Bangladesh AgencyCompany...

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

    Open Energy Info (EERE)

    Zone Region (Pritchett, 2004) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Thermal Gradient Holes Activity Date...

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

    Open Energy Info (EERE)

    Teleseismic-Seismic Monitoring At Walker-Lane Transitional Zone Region (Biasi, Et Al., 2009) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

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

    Open Energy Info (EERE)

    Teleseismic-Seismic Monitoring At Walker-Lane Transitional Zone Region (Biasi, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  8. Transition to turbulence in duct flow

    E-Print Network [OSTI]

    Biau, Damien; Bottaro, Alessandro; 10.1017/S0022112007009536

    2010-01-01

    The transition of the flow in a duct of square cross-section is studied. Like in the similar case of the pipe flow, the motion is linearly stable for all Reynolds numbers; this flow is thus a good candidate to investigate the 'bypass' path to turbulence. Initially the so-called 'linear optimal perturbation problem' is formulated and solved, yielding optimal disturbances in the form of longitudinal vortices. Such optimals, however, fail to elicit a significant response from the system in the nonlinear regime. Thus, streamwise-inhomogeneous, sub-optimal disturbances are focussed upon; nonlinear quadratic interactions are immediately evoked by such initial perturbations and an unstable streamwise-homogeneous large amplitude mode rapidly emerges. The subsequent evolution of the flow, at a value of the Reynolds number at the edge between fully developed turbulence and relaminarization, shows the alternance of patterns with two pairs of large scale vortices near opposing parallel walls. Such edge states bear a rese...

  9. Thermodynamics of pairing transition in hot nuclei

    E-Print Network [OSTI]

    Lang Liu; Zhen-Hua Zhang; Peng-Wei Zhao

    2014-12-16

    The pairing correlations in hot nuclei $^{162}$Dy are investigated in terms of the thermodynamical properties by covariant density functional theory. The heat capacities $C_V$ are evaluated in the canonical ensemble theory and the paring correlations are treated by a shell-model-like approach, in which the particle number is conserved exactly. A S-shaped heat capacity curve, which agrees qualitatively with the experimental data, has been obtained and analyzed in details. It is found that the one-pair-broken states play crucial roles in the appearance of the S shape of the heat capacity curve. Moreover, due to the effect of the particle-number conservation, the pairing gap varies smoothly with the temperature, which indicates a gradual transition from the superfluid to the normal state.

  10. Thermodynamics of pairing transition in hot nuclei

    E-Print Network [OSTI]

    Lang Liu; Zhen-Hua Zhang; Peng-Wei Zhao

    2015-10-09

    The pairing correlations in hot nuclei $^{162}$Dy are investigated in terms of the thermodynamical properties by covariant density functional theory. The heat capacities $C_V$ are evaluated in the canonical ensemble theory and the paring correlations are treated by a shell-model-like approach, in which the particle number is conserved exactly. A S-shaped heat capacity curve, which agrees qualitatively with the experimental data, has been obtained and analyzed in details. It is found that the one-pair-broken states play crucial roles in the appearance of the S shape of the heat capacity curve. Moreover, due to the effect of the particle-number conservation, the pairing gap varies smoothly with the temperature, which indicates a gradual transition from the superfluid to the normal state.

  11. Metal-insulator transition in holography

    E-Print Network [OSTI]

    Aristomenis Donos; Sean A. Hartnoll

    2013-01-19

    We exhibit an interaction-driven metal-insulator quantum phase transition in a holographic model. Use of a helical lattice enables us to break translation invariance while preserving homogeneity. The metallic phase is characterized by a sharp Drude peak and a d.c. resistivity that increases with temperature. In the insulating phase the Drude spectral weight is transferred into a `mid-infrared' peak and to energy scales of order the chemical potential. The d.c. resistivity now decreases with temperature. In the metallic phase, operators breaking translation invariance are irrelevant at low energy scales. In the insulating phase, translation symmetry breaking effects are present at low energies. We find the near horizon extremal geometry that captures the insulating physics.

  12. The Phase Transition of Dark Energy

    E-Print Network [OSTI]

    Wei Wang; Yuanxing Gui; Ying Shao

    2006-12-05

    Considering that the universe is filled with the nonrelativistic matter and dark energy and each component is respectively satisfied with its conservation condition in the absence of their interaction, we give the change rate of the fractional density and the density of dark energy from the conservation condition. It is clear that the fractional density of dark energy will monotonously increase and gradually become the dominating contribution to the universe as the redshift becomes low. Combining the evolutional trend of the state equation of dark energy and the change rate of the density of dark energy we find that the density of dark energy will decrease up to a minimum and whereafter it will increase again as the redshift becomes low. This can be regarded as the phase transition of dark energy from the quintessence phase to the phantom phase.

  13. Crossover transition in the Fluctuation of Internet

    E-Print Network [OSTI]

    Qian, Jiang-Hai; Han, Ding-Ding; Ma, Yu-Gang

    2015-01-01

    Gibrat's law predicts that the standard deviation of the growth rate of a node's degree is constant. On the other hand, the preferential attachment(PA) indicates that such standard deviation decreases with initial degree as a power law of exponent $-0.5$. While both models have been applied to Internet modeling, this inconsistency requires the verification of their validation. Therefore we empirically study the fluctuation of Internet of three different time intervals(daily, monthly and yearly). We find a crossover transition from PA model to Gibrat's law, which has never been reported. Specifically Gibrat-law starts from small degree region and extends gradually with the increase of the observed period. We determine the validated periods for both models and find that the correlation between internal links has large contribution to the emergence of Gibrat law. These findings indicate neither PA nor Gibrat law is applicable to the actual Internet, which requires a more complete model theory.

  14. Dynamic Analysis of Fuel Cycle Transitioning

    SciTech Connect (OSTI)

    Brent Dixon; Steve Piet; David Shropshire; Gretchen Matthern

    2009-09-01

    This paper examines the time-dependent dynamics of transitioning from a once-through fuel cycle to a closed fuel cycle. The once-through system involves only Light Water Reactors (LWRs) operating on uranium oxide fuel UOX), while the closed cycle includes both LWRs and fast spectrum reactors (FRs) in either a single-tier system or two-tier fuel system. The single-tier system includes full transuranic recycle in FRs while the two-tier system adds one pass of mixed oxide uranium-plutonium (MOX U-Pu) fuel in the LWR. While the analysis primarily focuses on burner fast reactors, transuranic conversion ratios up to 1.0 are assessed and many of the findings apply to any fuel cycle transitioning from a thermal once-through system to a synergistic thermal-fast recycle system. These findings include uranium requirements for a range of nuclear electricity growth rates, the importance of back end fuel cycle facility timing and magnitude, the impact of employing a range of fast reactor conversion ratios, system sensitivity to used fuel cooling time prior to recycle, impacts on a range of waste management indicators, and projected electricity cost ranges for once-through, single-tier and two-tier systems. The study confirmed that significant waste management benefits can be realized as soon as recycling is initiated, but natural uranium savings are minimal in this century. The use of MOX in LWRs decouples the development of recycle facilities from fast reactor fielding, but also significantly delays and limits fast reactor deployment. In all cases, fast reactor deployment was significantly below than predicted by static equilibrium analyses.

  15. A smooth transition to hydrogen transportation fuel

    SciTech Connect (OSTI)

    Berry, G.D.; Smith, J.R.; Schock, R.N.

    1995-04-14

    The goal of this work is to examine viable near-term infrastructure options for a transition to hydrogen fueled vehicles and to suggest profitable directions for technology development. The authors have focused in particular on the contrasting options of decentralized production using the existing energy distribution network, and centralized production of hydrogen with a large-scale infrastructure. Delivered costs have been estimated using best available industry cost and deliberately conservative economic assumptions. The sensitivities of these costs have then been examined for three small-scale scenarios: (1) electrolysis at the home for one car, and production at the small station scale (300 cars/day), (2) conventional alkaline electrolysis and (3) steam reforming of natural gas. All scenarios assume fueling a 300 mile range vehicle with 3.75 kg. They conclude that a transition appears plausible, using existing energy distribution systems, with home electrolysis providing fuel costing 7.5 to 10.5{cents}/mile, station electrolysis 4.7 to 7.1{cents}/mile, and steam reforming 3.7 to 4.7{cents}/mile. The average car today costs about 6{cents}/mile to fuel. Furthermore, analysis of liquid hydrogen delivered locally by truck from central processing plants can also be competitive at costs as low as 4{cents}/mile. These delivered costs are equal to $30 to $70 per GJ, LHV. Preliminary analysis indicates that electricity transmission costs favor this method of distributing energy, until very large (10 GW) hydrogen pipelines are installed. This indicates that significant hydrogen pipeline distribution will be established only when significant markets have developed.

  16. Transit light curves with finite integration time: Fisher information analysis

    SciTech Connect (OSTI)

    Price, Ellen M.; Rogers, Leslie A.

    2014-10-10

    Kepler has revolutionized the study of transiting planets with its unprecedented photometric precision on more than 150,000 target stars. Most of the transiting planet candidates detected by Kepler have been observed as long-cadence targets with 30 minute integration times, and the upcoming Transiting Exoplanet Survey Satellite will record full frame images with a similar integration time. Integrations of 30 minutes affect the transit shape, particularly for small planets and in cases of low signal to noise. Using the Fisher information matrix technique, we derive analytic approximations for the variances and covariances on the transit parameters obtained from fitting light curve photometry collected with a finite integration time. We find that binning the light curve can significantly increase the uncertainties and covariances on the inferred parameters when comparing scenarios with constant total signal to noise (constant total integration time in the absence of read noise). Uncertainties on the transit ingress/egress time increase by a factor of 34 for Earth-size planets and 3.4 for Jupiter-size planets around Sun-like stars for integration times of 30 minutes compared to instantaneously sampled light curves. Similarly, uncertainties on the mid-transit time for Earth and Jupiter-size planets increase by factors of 3.9 and 1.4. Uncertainties on the transit depth are largely unaffected by finite integration times. While correlations among the transit depth, ingress duration, and transit duration all increase in magnitude with longer integration times, the mid-transit time remains uncorrelated with the other parameters. We provide code in Python and Mathematica for predicting the variances and covariances at www.its.caltech.edu/?eprice.

  17. On the semimetal-insulator transition and Lifshitz transition in simulations of mono-layer graphene

    E-Print Network [OSTI]

    Dominik Smith; Michael Körner; Lorenz von Smekal

    2014-10-28

    We report on the status of ongoing Hybrid-Monte-Carlo simulations of the tight-binding model of mono-layer graphene. We present results concerning the semimetal-insulator phase transition, whereby two-body interactions are modeled by a partially screened Coulomb potential which takes into account screening by electrons in the lower $\\sigma$-orbitals. We obtain evidence that finite-size effects may still be present in the current estimate of the critical coupling strength $\\alpha_C$, which was previously extracted from simulations on lattice-sizes up to $N_x=N_y=18$. We also present preliminary results concerning the Neck-disrupting Lifshitz transition which occurs at finite Fermion-density in the limit of vanishing two-body interactions. A sign-problem is circumvented by using a spin-dependent chemical potential in our simulations.

  18. Long Beach Transit: Two-Year Evaluation of Gasoline-Electric Hybrid Transit Buses

    SciTech Connect (OSTI)

    Lammert, M.

    2008-06-01

    This report focuses on a gasoline-electric hybrid transit bus propulsion system. The propulsion system is an alternative to standard diesel buses and allows for reductions in emissions (usually focused on reductions of particulate matter and oxides of nitrogen) and petroleum use. Gasoline propulsion is an alternative to diesel fuel and hybrid propulsion allows for increased fuel economy, which ultimately results in reduced petroleum use.

  19. Electricity reform in developing and transition countries: A reappraisal

    E-Print Network [OSTI]

    Kammen, Daniel M.

    Electricity reform in developing and transition countries: A reappraisal J.H. Williams, R. Ghanadan-3050, USA Abstract Since about 1990, many developing and transition countries have undertaken market-oriented reforms in their electric power sectors. Despite the widespread adoption of a standard policy model

  20. Performance Evaluation of Guardfence to Bridge Rail Transitions

    E-Print Network [OSTI]

    rail transition that complies with the testing requirements of NCHRP Report 350 for use on high-speed roadways that is less expensive and complex than the current high- speed design. A second objective. Although a 27 in. (686 mm) tall transition section was not feasible for high-speed impact conditions

  1. Improving Test Coverage for UML State Machines Using Transition Instrumentation

    E-Print Network [OSTI]

    Schlingloff, Holger

    Improving Test Coverage for UML State Machines Using Transition Instrumentation Mario Friske by instrumenting transitions, and performing an appro- priate pre- and postprocessing. We describe the necessary implementation is available, which is usually rather late in the development process, and third, whenever

  2. Process Transition Networks: A Formal Graphical Knowledge Representation Tool

    E-Print Network [OSTI]

    Process Transition Networks: A Formal Graphical Knowledge Representation Tool Jacek Malec \\Lambda@ida.liu.se Abstract A formal definition of Process Transition Networks (PTNs), recently introduced by Sande­ wall [San with Petri net theory. PTNs are first introduced informally, fol­ lowed by syntactic and semantic

  3. Studying Transition Region Phenomena with Solar-B/EIS

    E-Print Network [OSTI]

    P. R. Young

    2007-08-13

    Transition region lines in active regions can become strongly enhanced in coronal footpoints and active region blinkers. The weak transition region lines found in the Solar-B/EIS wavebands will thus become useful for diagnostic studies of these events. EIS count rates predicted from SOHO/CDS spectra are presented, and a Mg VII density diagnostic is highlighted.

  4. Nanostructured transition metal oxides useful for water oxidation catalysis

    DOE Patents [OSTI]

    Frei, Heinz M; Jiao, Feng

    2013-12-24

    The present invention provides for a composition comprising a nanostructured transition metal oxide capable of oxidizing two H.sub.2O molecules to obtain four protons. In some embodiments of the invention, the composition further comprises a porous matrix wherein the nanocluster of the transition metal oxide is embedded on and/or in the porous matrix.

  5. Water-Peptide Dynamics during Conformational Transitions Dmitry Nerukh*,

    E-Print Network [OSTI]

    Nerukh, Dmitry

    Water-Peptide Dynamics during Conformational Transitions Dmitry Nerukh*, and Sergey Karabasov are investigated using classical molecular dynamics simulation with explicit water molecules. The distribution of the surrounding water at different moments before the transitions and the dynamical correlations of water

  6. Anomalous emissions of 103mRh biphoton transitions

    E-Print Network [OSTI]

    Yao Cheng; Bing Xia

    2009-08-06

    In this report, the anomalous emissions, centered on the one half transition energy 39.76/2 keV, are observed from the long-lived Mossbauer state of 103mRh excited by bremsstrahlung exposure. Strong coupling with identical nuclei in Rh crystals opens cascade channels for biphoton transitions.

  7. Disordering transitions in vortex matter: peak effect and phase diagram

    E-Print Network [OSTI]

    Scalettar, Richard T.

    Disordering transitions in vortex matter: peak effect and phase diagram C.J. Olson a,*, C- order nature of this transition. In YBCO a rapid increase in Jc as a function of magnetic field vortex phase diagram as a function of magnetic field and temperature. For increasing field or temperature

  8. Stationary Applications of Energy Storage Technologies for Transit Systems

    E-Print Network [OSTI]

    Shu, Lily H.

    Stationary Applications of Energy Storage Technologies for Transit Systems Paul Radcliffe, James S, Ontario, Canada paul.radcliffe@utoronto.ca Abstract ­ Stationary energy storage technologies can improve the efficiency of transit systems. In this paper, three different demonstrations of energy storage technologies

  9. MODELLING AND SIMULATION OF LIQUID-VAPOR PHASE TRANSITION

    E-Print Network [OSTI]

    Faccanoni, Gloria

    . (,) P pressure law. G. Faccanoni DNS OF LIQUIDE-VAPOR PHASE TRANSITION 6 / 23 #12;Model Numerical Method. (,) P pressure law. G. Faccanoni DNS OF LIQUIDE-VAPOR PHASE TRANSITION 6 / 23 #12;Model Numerical Method Vapor = 0 x = 0 = 1Fictive fluid 0 pressure law

  10. Optimal Design of Demand-Responsive Feeder Transit Services 

    E-Print Network [OSTI]

    Li, Xiugang

    2010-10-12

    The general public considers Fixed-Route Transit (FRT) to be inconvenient while Demand-Responsive Transit (DRT) provides much of the desired flexibility with a door-to-door type of service. However, FRT is typically more cost efficient than DRT...

  11. Liquid-glass Transition in Charge-stabilized Colloidal Dispersions

    E-Print Network [OSTI]

    Liquid-glass Transition in Charge-stabilized Colloidal Dispersions S.K. Lai, G.F. Wang and W Abstract. We model the inter-colloidal interactions in a charge-stabilized col- loidal dispersion by a hard the loci of the liquid-glass transition phase boundary for a salt-free suspension of charged colloids

  12. THE TRANSIT LIGHT CURVE OF AN EXOZODIACAL DUST CLOUD

    SciTech Connect (OSTI)

    Stark, Christopher C.

    2011-10-15

    Planets embedded within debris disks gravitationally perturb nearby dust and can create clumpy, azimuthally asymmetric circumstellar ring structures that rotate in lock with the planet. The Earth creates one such structure in the solar zodiacal dust cloud. In an edge-on system, the dust 'clumps' periodically pass in front of the star as the planet orbits, occulting and forward-scattering starlight. In this paper, we predict the shape and magnitude of the corresponding transit signal. To do so, we model the dust distributions of collisional, steady-state exozodiacal clouds perturbed by planetary companions. We examine disks with dusty ring structures formed by the planet's resonant trapping of in-spiraling dust for a range of planet masses and semi-major axes, dust properties, and disk masses. We synthesize edge-on images of these models and calculate the transit signatures of the resonant ring structures. The transit light curves created by dusty resonant ring structures typically exhibit two broad transit minima that lead and trail the planetary transit. We find that Jupiter-mass planets embedded within disks hundreds of times denser than our zodiacal cloud can create resonant ring structures with transit depths up to {approx}10{sup -4}, possibly detectable with Kepler. Resonant rings produced by planets more or less massive than Jupiter produce smaller transit depths. Observations of these transit signals may provide upper limits on the degree of asymmetry in exozodiacal clouds.

  13. Quantum Shape-Phase Transitions in Finite Nuclei

    E-Print Network [OSTI]

    A. Leviatan

    2006-12-06

    Quantum shape-phase transitions in finite nuclei are considered in the framework of the interacting boson model. Critical-point Hamiltonians for first- and second-order transitions are identified by resolving them into intrinsic and collective parts. Suitable wave functions and finite-N estimates for observables at the critical-points are derived.

  14. GLASS TRANSITION SEEN THROUGH ASYMPTOTIC JULIEN OLIVIER AND MICHAEL RENARDY

    E-Print Network [OSTI]

    GLASS TRANSITION SEEN THROUGH ASYMPTOTIC EXPANSIONS JULIEN OLIVIER AND MICHAEL RENARDY Abstract of the model at low shear rate changes when a certain parameter (which we call the glass parameter) crosses´ebraud-Lequeux model, a Fokker-Planck-like description of soft glassy material, exhibits such a glass transition

  15. Calorimetric glass transition explained by hierarchical dynamic facilitation

    E-Print Network [OSTI]

    Garrahan, Juan P.

    Calorimetric glass transition explained by hierarchical dynamic facilitation Aaron S. Keysa Contributed by David Chandler, February 11, 2013 (sent for review November 15, 2012) The glass transition different on cooling than on heating, and the response to melting a glass depends markedly on the cooling

  16. Mechanism of Ligand Exchange Studied Using Transition Path Sampling

    E-Print Network [OSTI]

    Harris, Charles B.

    Mechanism of Ligand Exchange Studied Using Transition Path Sampling Preston T. Snee, Jennifer@socrates.berkeley.edu Abstract: The mechanism of intermolecular ligand exchange has been studied using transition path sampling that there are multiple steps in the reaction mechanism. The first involves partial dissociation of the coordinated

  17. Energy Transitions: A Systems Approach Including Marcellus Shale Gas Development

    E-Print Network [OSTI]

    Chen, Tsuhan

    Energy Transitions: A Systems Approach Including Marcellus Shale Gas Development A Report Transitions: A Systems Approach Including Marcellus Shale Gas Development Executive Summary In the 21st the Marcellus shale In addition to the specific questions identified for the case of Marcellus shale gas in New

  18. Capillary and winding transitions in a confined cholesteric liquid crystal

    E-Print Network [OSTI]

    Daniel de las Heras; Enrique Velasco; Yuri Martínez-Ratón

    2015-07-23

    We consider a Lebwohl-Lasher model of chiral particles confined in a planar cell (slit pore) with different boundary conditions, and solve it using mean-field theory. The phase behaviour of the system with respect to temperature and pore width is studied. Two phenomena are observed: (i) an isotropic-cholesteric transition which exhibits an oscillatory structure with respect to pore width, and (ii) an infinite set of winding transitions caused by commensuration effects between cholesteric pitch and pore width. The latter transitions have been predicted and analysed by other authors for cholesterics confined in a fixed pore and subject to an external field promoting the uniaxial nematic phase; here we induce winding transitions solely from geometry by changing the pore width at zero external field (a setup recently explored in Atomic-Force Microscopy experiments). In contrast with previous studies, we obtain the phase diagrams in the temperature vs pore width plane, including the isotropic-cholesteric transition, the winding transitions and their complex relationship. In particular, the structure of winding transitions terminates at the capillary isotropic-cholesteric transition via triple points where the confined isotropic phase coexists with two cholesterics with different helix indices. For symmetric and asymmetric monostable plate anchorings the phase diagram are qualitatively similar.

  19. Optoelectronic devices utilizing materials having enhanced electronic transitions

    DOE Patents [OSTI]

    Black, Marcie R.

    2013-04-09

    An optoelectronic device that includes a material having enhanced electronic transitions. The electronic transitions are enhanced by mixing electronic states at an interface. The interface may be formed by a nano-well, a nano-dot, or a nano-wire.

  20. University of Oklahoma [UCOL 3001: TRANSITIONS ] Boomer Sooners! OU

    E-Print Network [OSTI]

    Oklahoma, University of

    University of Oklahoma [UCOL 3001: TRANSITIONS ] Boomer Sooners! OU Transitions for Transfer, and resources at the University of Oklahoma. Students will learn about academic advising, transfer credit institution. Course Objectives Understand the mission of the University of Oklahoma Understand the Who

  1. Transit timing with fast cameras on large telescopes

    E-Print Network [OSTI]

    Adams, Elisabeth Rose

    2010-01-01

    Timing and system parameters were measured for seven transiting exoplanets: OGLETR- 56b (11 transits), OGLE-TR-132b (7), OGLE-TR-111b (6), OGLE-TR-113b (6), CoRoT-2b (3), OGLE-TR-10b (3), and XO-2b (2). Ground-based ...

  2. Direct Molecular Dynamics Observation of Protein Folding Transition State Ensemble

    E-Print Network [OSTI]

    Stanley, H. Eugene

    Direct Molecular Dynamics Observation of Protein Folding Transition State Ensemble Feng Ding for the interpretation of experimental results and understanding of protein folding mechanics, which has at- tracted, 1999; Guerois and Serrano, 2000) have been proposed to predict the transition states in protein folding

  3. Use of Transition Metal Forms in Separation of Lipid Components 

    E-Print Network [OSTI]

    Kulkarni, Sayali V

    2014-08-01

    AND MATERIALS ................................................................................. 16 3.1 Evaluation of Effectives of Free Forms of Transition Metal Ions to form Complexes with Olefinic Double Bond in an Organic- Aqueous Two-Phase System... ............................................... 24 4. RESULTS AND DISCUSSION .................................................................................. 26 4.1 Evaluation of Effectives of Transition Metal Ions to form Complexes with Olefinic Double Bond in an Organic-Aqueous Two- Phase...

  4. Fragile structural transition in Mo3Sb7

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

    Yan, Jiaqiang -Q.; McGuire, Michael A; May, Andrew F; Parker, David S.; Mandrus, D. G.; Sales, Brian C.

    2015-08-10

    Mo3Sb7 single crystals lightly doped with Cr, Ru, or Te are studied in order to explore the interplay between superconductivity, magnetism, and the cubic-tetragonal structural transition. The structural transition at 53 K is extremely sensitive to Ru or Te substitution which introduces additional electrons, but robust against Cr substitution. We observed no sign of a structural transition in superconducting Mo2.91Ru0.09Sb7 and Mo3Sb6.975Te0.025. In contrast, 3 at.% Cr doping only slightly suppresses the structural transition to 48 K while leaving no trace of superconductivity above 1.8 K. Analysis of magnetic properties suggests that the interdimer interaction in Mo3Sb7 is near amore »critical value and essential for the structural transition. Futhermore, all dopants suppress the superconductivity of Mo3Sb7. The tetragonal structure is not necessary for superconductivity.« less

  5. Phase transition of holographic entanglement entropy in massive gravity

    E-Print Network [OSTI]

    Zeng, Xiao-Xiong; Li, Li-Fang

    2015-01-01

    The phase structure of holographic entanglement entropy is studied in massive gravity for the quantum systems with finite and infinite volumes, which in the bulk is dual to calculate the minimal surface area for a black hole and black brane respectively. In the entanglement entropy$-$temperature plane, we find for both the black hole and black brane there is a Van der Waals-like phase transition as the case in thermal entropy$-$temperature plane. That is, there is a first order phase transition for the small charge and a second order phase transition at the critical charge. For the first order phase transition, the equal area law is checked and for the second order phase transition, the critical exponent of the heat capacity is obtained. All the results show that the phase structure of holographic entanglement entropy is the same as that of thermal entropy regardless of the volume of the spacetime on the boundary.

  6. Gaseous diffusion plant transition from DOE to external regulation

    SciTech Connect (OSTI)

    Dann, R.K.; Crites, T.R.; Rahm-Crites, L.K. [Lawrence Livermore National Lab., CA (United States)

    1997-12-01

    After many years of operation as government-owned/contractor-operated facilities, large portions of the gaseous diffusion plants (GDPs) at Portsmouth, Ohio, and Paducah, Kentucky, were leased to the United States Enrichment Corporation (USEC). These facilities are now certified by the U.S. Nuclear Regulatory Commission (NRC) and subject to oversight by the Occupational Safety and Health Administration (OSHA). The transition from DOE to NRC regulation was more difficult than expected. The original commitment was to achieve NRC certification in October 1995; however, considerably more time was required and transition-related costs escalated. The Oak Ridge Operations Office originally estimated the cost of transition at $60 million; $240 million has been spent to date. The DOE`s experience in transitioning the GDPs to USEC operation with NRC oversight provides valuable lessons (both positive and negative) that could be applied to future transitions.

  7. Transport coefficients and quark-hadron phase transition(s) from PLSM in vanishing and finite magnetic field

    E-Print Network [OSTI]

    Abdel Nasser Tawfik

    2015-09-30

    In peripheral heavy-ion collisions, localized ,short-lived an extremely huge magnetic field can be generated. Its possible influences on the quark-hadron phase transition(s) and the transport properties of the hadronic and partonic matter shall be analysed from the Polyakov linear-sigma model. Our calculations are compared with recent lattice QCD calculations.

  8. Transport coefficients and quark-hadron phase transition(s) from PLSM in vanishing and finite magnetic field

    E-Print Network [OSTI]

    Tawfik, Abdel Nasser

    2015-01-01

    In peripheral heavy-ion collisions, localized ,short-lived an extremely huge magnetic field can be generated. Its possible influences on the quark-hadron phase transition(s) and the transport properties of the hadronic and partonic matter shall be analysed from the Polyakov linear-sigma model. Our calculations are compared with recent lattice QCD calculations.

  9. Public Transit Investment and Sustainable Transportation: A Review of Transit's Impact on Traffic Congestion and Air Quality

    E-Print Network [OSTI]

    Lin, C.-Y. Cynthia

    In this paper we provide a framework for evaluating the effects of public transit investment on the market is essential both for allocating transit investment funds and for designing policies that result, 2014). This scenario is related to forecasted growth in population and GDP, declining fuel prices

  10. Flow transitions in two-dimensional foams

    E-Print Network [OSTI]

    Christopher Gilbreth; Scott Sullivan; Michael Dennin

    2006-08-08

    For sufficiently slow rates of strain, flowing foam can exhibit inhomogeneous flows. The nature of these flows is an area of active study in both two-dimensional model foams and three dimensional foam. Recent work in three-dimensional foam has identified three distinct regimes of flow [S. Rodts, J. C. Baudez, and P. Coussot, Europhys. Lett. {\\bf 69}, 636 (2005)]. Two of these regimes are identified with continuum behavior (full flow and shear-banding), and the third regime is identified as a discrete regime exhibiting extreme localization. In this paper, the discrete regime is studied in more detail using a model two dimensional foam: a bubble raft. We characterize the behavior of the bubble raft subjected to a constant rate of strain as a function of time, system size, and applied rate of strain. We observe localized flow that is consistent with the coexistence of a power-law fluid with rigid body rotation. As a function of applied rate of strain, there is a transition from a continuum description of the flow to discrete flow when the thickness of the flow region is approximately 10 bubbles. This occurs at an applied rotation rate of approximately $0.07 {\\rm s^{-1}}$.

  11. QCD PHASE TRANSITIONS-VOLUME 15.

    SciTech Connect (OSTI)

    SCHAFER,T.

    1998-11-04

    The title of the workshop, ''The QCD Phase Transitions'', in fact happened to be too narrow for its real contents. It would be more accurate to say that it was devoted to different phases of QCD and QCD-related gauge theories, with strong emphasis on discussion of the underlying non-perturbative mechanisms which manifest themselves as all those phases. Before we go to specifics, let us emphasize one important aspect of the present status of non-perturbative Quantum Field Theory in general. It remains true that its studies do not get attention proportional to the intellectual challenge they deserve, and that the theorists working on it remain very fragmented. The efforts to create Theory of Everything including Quantum Gravity have attracted the lion share of attention and young talent. Nevertheless, in the last few years there was also a tremendous progress and even some shift of attention toward emphasis on the unity of non-perturbative phenomena. For example, we have seen some. efforts to connect the lessons from recent progress in Supersymmetric theories with that in QCD, as derived from phenomenology and lattice. Another example is Maldacena conjecture and related development, which connect three things together, string theory, super-gravity and the (N=4) supersymmetric gauge theory. Although the progress mentioned is remarkable by itself, if we would listen to each other more we may have chance to strengthen the field and reach better understanding of the spectacular non-perturbative physics.

  12. The Equinox Transition Study: An overview

    SciTech Connect (OSTI)

    Carlsson, H.C. Jr. (Hanscom Air Force Base, Bedford, MA (USA)); Growley, G. (National Center for Atmospheric Research, Boulder, CO (USA))

    1989-12-01

    The Equinox Transition study (ETS) of September 17-24, 1984, was an extraordinarily successful coordinated campaign. The experimental design resulted in a large quantity of high-quality data that were comprehensive both in their completeness of measured parameters and in coverage that was global rather than mesoscale. Nature also cooperated in providing a calibrated geophysical scale over an extreme dynamic range of disturbance. The 8-day period involved the most disturbed day of the year and a day half as disturbed, separated an preceded by quiet days. The ETS data set was thus unique among campaigns of this nature. The broad scientific aim of ETS is to understand the electromechanical response of the thermosphere/ionosphere system to variable high-latitude forcing. The interdisciplinary cross talk engendered by ETS has led beyond the original goals of the project to the identification of important new couplings between the mesosphere/lower thermosphere/upper thermosphere/ionosphere/magnetosphere through a variety of mechanisms ranging from mechanical to chemical to electrical. In this paper the authors present an overview of the ETS, and they describe the development of the experimental and analysis philosophies behind the project. Many of the lessons learned are relevant to the planning of future campaigns. Finally, they summarize some of the results obtained from the ETS.

  13. Chaotic Transitions in Wall Following Robots

    E-Print Network [OSTI]

    Harry W. Bullen IV; Priya Ranjan

    2009-08-25

    In this paper we examine how simple agents similar to Braitenberg vehicles can exhibit chaotic movement patterns. The agents are wall following robots as described by Steve Mesburger and Alfred Hubler in their paper "Chaos in Wall Following Robots". These agents uses a simple forward facing distance sensor, with a limited field of view "phi" for navigation. An agent drives forward at a constant velocity and uses the sensor to turn right when it is too close to an object and left when it is too far away. For a flat wall the agent stays a fixed distance from the wall and travels along it, regardless of the sensor's capabilities. But, if the wall represents a periodic function, the agent drives on a periodic path when the sensor has a narrow field of view. The agent's trajectory transitions to chaos when the sensor's field of view is increased. Numerical experiments were performed with square, triangle, and sawtooth waves for the wall, to find this pattern. The bifurcations of the agents were analyzed, finding both border collision and period doubling bifurcations. Detailed experimental results will be reported separately.

  14. Connecticut Transit (CTTRANSIT) Fuel Cell Transit Bus: Third Evaluation Report and Appendices

    Broader source: Energy.gov [DOE]

    This report describes operations at Connecticut Transit (CTTRANSIT) in Hartford for one prototype fuel cell bus and three new diesel buses operating from the same location. The prototype fuel cell bus was manufactured by Van Hool and ISE Corp. and features an electric hybrid drive system with a UTC Power PureMotion 120 Fuel Cell Power System and ZEBRA batteries for energy storage. The fuel cell bus started operation in April 2007, and evaluation results through October 2009 are provided in this report.

  15. Connecticut Transit (CTTRANSIT) Fuel Cell Transit Bus: Third Evaluation Report and Appendices

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2010-01-01

    This report describes operations at Connecticut Transit (CTTRANSIT) in Hartford for one prototype fuel cell bus and three new diesel buses operating from the same location. The prototype fuel cell bus was manufactured by Van Hool and ISE Corp. and features an electric hybrid drive system with a UTC Power PureMotion 120 Fuel Cell Power System and ZEBRA batteries for energy storage. The fuel cell bus started operation in April 2007, and evaluation results through October 2009 are provided in this report.

  16. Influence of grain boundary energy on the nucleation of complexion transitions

    E-Print Network [OSTI]

    Rohrer, Gregory S.

    Influence of grain boundary energy on the nucleation of complexion transitions Stephanie A different transition tem- peratures. It has been hypothesized that higher energy grain boundaries have relative energies preferentially undergo complexion transitions. Our experiment uses a unique sandwich

  17. THE TRANSITING EXOPLANET SURVEY SATELLITE: SIMULATIONS OF PLANET DETECTIONS AND ASTROPHYSICAL FALSE POSITIVES

    E-Print Network [OSTI]

    Sullivan, Peter W.

    The Transiting Exoplanet Survey Satellite (TESS) is a NASA-sponsored Explorer mission that will perform a wide-field survey for planets that transit bright host stars. Here, we predict the properties of the transiting ...

  18. Transit and secondary eclipse photometry in the near-infrared

    E-Print Network [OSTI]

    Ignas Snellen

    2007-05-02

    Near-infrared photometry of transiting extrasolar planets can be of great scientific value. It is however not straightforward to reach the necessary millimagnitude precision. Here we report on our attempts to observe transits and secondary eclipses of several extrasolar planets at 2.2 micron. Best results have been obtained on OGLE-TR-113b using the SOFI near-infrared camera on ESO's New Technology Telescope. Its K-band transit shows a remarkably flat bottom indicating low stellar limb darkening. Secondary eclipse photometry has resulted in a formal 3 sigma detection, but residual systematic effects make this detection rather uncertain.

  19. Effects of Phase Transition induced density fluctuations on pulsar dynamics

    E-Print Network [OSTI]

    Bagchi, Partha; Layek, Biswanath; Srivastava, Ajit M

    2015-01-01

    We show that density fluctuations during phase transitions in pulsar cores may have non-trivial effects on pulsar timings, and may also possibly account for glitches and anti-glitches. These density fluctuations invariably lead to non-zero off-diagonal components of the moment of inertia, leading to transient wobbling of star. Thus, accurate measurements of pulsar timing and intensity modulations (from wobbling) may be used to identify the specific pattern of density fluctuations, hence the particular phase transition, occurring inside the pulsar core. Changes in quadrupole moment from rapidly evolving density fluctuations during the transition, with very short time scales, may provide a new source for gravitational waves.

  20. Freezing transitions in non-Fellerian particle systems

    E-Print Network [OSTI]

    C. Maes; F. Redig; E. Saada

    2005-12-22

    Non-Fellerian processes show phenomena that are unseen in standard interacting particle systems. We consider freezing transitions in one-dimensional non-Fellerian processes which are built from the abelian sandpile additions to which in one case, spin flips are added, and in another case, the so called anti-sandpile subtractions. In the first case and as a function of the sandpile addition rate, there is a sharp transition from a non-trivial invariant measure to the invariant measure of the sandpile process. For the combination sandpile plus anti-sandpile, there is a sharp transition from one frozen state to the other anti-state

  1. Gravitational waves from cosmological first order phase transitions

    E-Print Network [OSTI]

    Hindmarsh, Mark; Rummukainen, Kari; Weir, David

    2015-01-01

    First order phase transitions in the early Universe generate gravitational waves, which may be observable in future space-based gravitational wave observatiories, e.g. the European eLISA satellite constellation. The gravitational waves provide an unprecedented direct view of the Universe at the time of their creation. We study the generation of the gravitational waves during a first order phase transition using large-scale simulations of a model consisting of relativistic fluid and an order parameter field. We observe that the dominant source of gravitational waves is the sound generated by the transition, resulting in considerably stronger radiation than earlier calculations have indicated.

  2. Gravitational waves from cosmological first order phase transitions

    E-Print Network [OSTI]

    Mark Hindmarsh; Stephan Huber; Kari Rummukainen; David Weir

    2015-11-14

    First order phase transitions in the early Universe generate gravitational waves, which may be observable in future space-based gravitational wave observatiories, e.g. the European eLISA satellite constellation. The gravitational waves provide an unprecedented direct view of the Universe at the time of their creation. We study the generation of the gravitational waves during a first order phase transition using large-scale simulations of a model consisting of relativistic fluid and an order parameter field. We observe that the dominant source of gravitational waves is the sound generated by the transition, resulting in considerably stronger radiation than earlier calculations have indicated.

  3. Nuclear clocks based on resonant excitation of gamma-transitions

    E-Print Network [OSTI]

    Ekkehard Peik; Maxim Okhapkin

    2015-02-25

    We review the ideas and concepts for a clock that is based on a radiative transition in the nucleus rather than in the electron shell. This type of clock offers advantages like an insensitivity against field-induced systematic frequency shifts and the opportunity to obtain high stability from interrogating many nuclei in the solid state. Experimental work concentrates on the low-energy (about 8 eV) isomeric transition in Th-229. We review the status of the experiments that aim at a direct optical observation of this transition and outline the plans for high-resolution laser spectroscopy experiments.

  4. BC Transit Fuel Cell Bus Project Evaluation Results: Second Report

    SciTech Connect (OSTI)

    Eudy, L.; Post, M.

    2014-09-01

    Second report evaluating a fuel cell electric bus (FCEB) demonstration led by British Columbia Transit (BC Transit) in Whistler, Canada. BC Transit is collaborating with the California Air Resources Board and the U.S. Department of Energy's National Renewable Energy Laboratory to evaluate the buses in revenue service. NREL published its first report on the demonstration in February 2014. This report is an update to the previous report; it covers 3 full years of revenue service data on the buses from April 2011 through March 2014 and focuses on the final experiences and lessons learned.

  5. Microscopic analysis of order parameters in nuclear quantum phase transitions

    SciTech Connect (OSTI)

    Li, Z. P.; Niksic, T.; Vretenar, D.; Meng, J.

    2009-12-15

    Microscopic signatures of nuclear ground-state shape phase transitions in Nd isotopes are studied using excitation spectra and collective wave functions obtained by diagonalization of a five-dimensional Hamiltonian for quadrupole vibrational and rotational degrees of freedom, with parameters determined by constrained self-consistent relativistic mean-field calculations for triaxial shapes. As a function of the physical control parameter, the number of nucleons, energy gaps between the ground state and the excited vibrational states with zero angular momentum, isomer shifts, and monopole transition strengths exhibit sharp discontinuities at neutron number N=90, which is characteristic of a first-order quantum phase transition.

  6. Linking the micro and macro: L-H transition dynamics and threshold...

    Office of Scientific and Technical Information (OSTI)

    flows. Turbulence driven shear flows are needed to trigger the transition by extracting energy from the turbulence. Thus, we identify the critical transition physics components...

  7. Developing strategies for resource-constrained transit growth through increased private sector involvement

    E-Print Network [OSTI]

    Gordon, Michael A. (Michael Andrew)

    2015-01-01

    Many transit agencies are facing budgetary, institutional, physical infrastructure, and vehicle constraints, which all tend to restrict agency service growth. This research proposes strategies that allow transit agencies ...

  8. Environmental policy in transition economies : the effectiveness of pollution changes

    E-Print Network [OSTI]

    Söderholm, Patrik

    1999-01-01

    Most economists and analysts claim that extended use of pollution charges in environmental policy will have substantial efficiency advantages in countries undergoing transition to market economies. Essentially this paper ...

  9. Transition between fragmentation and permeable outgassing of low viscosity magmas

    E-Print Network [OSTI]

    Manga, Michael

    Transition between fragmentation and permeable outgassing of low viscosity magmas Atsuko Namiki a; fragmentation; decompression; permeability; outgassing; basaltic magma; fire fountain 1. Introduction into discrete pieces (fragmentation) and the rate at which gases escape from the rising magma (outgassing

  10. Transitioning to Biofuels: A System-of-Systems Perspective; Preprint

    SciTech Connect (OSTI)

    Riley, C.; Sandor, D.

    2008-06-01

    Using the existing fuel supply chain infrastructure as a framework, this paper discusses a vision for transitioning to a larger biofuels industry and the challenges associated with a massive market and infrastructure transformation.

  11. Contactless prepaid and bankcards in transit fare collection systems

    E-Print Network [OSTI]

    Brakewood, Candace Elizabeth

    2010-01-01

    Many public transit agencies are considering direct acceptance of contactless credit and debit cards (collectively contactless bankcards) at gates in rail stations and on board buses. Concerns have been raised about riders ...

  12. Nitrene transfer reactions by late transition metal complexes

    E-Print Network [OSTI]

    Hamilton, Charles W., Ph. D. Massachusetts Institute of Technology

    2007-01-01

    This thesis presents nitrene transfer reactions that are catalyzed or mediated by late transition metal complexes. Sterically large, fluorinated supporting ligands are used to minimize potential side reactions. A new ...

  13. Strategy Guideline: Transitioning HVAC Companies to Whole House Performance Contractors

    SciTech Connect (OSTI)

    Burdick, A.

    2012-05-01

    This report describes the findings from research IBACOS conducted related to heating, ventilation, and air conditioning (HVAC) companies who have made the decision to transition to whole house performance contracting (WHPC).

  14. Privatization of transit in Yokohama : social and financial impacts

    E-Print Network [OSTI]

    Nakajima, Tsukihito

    2007-01-01

    This research examines both social and financial impacts of the privatization of municipally-owned transit systems from the perspective of a privatizing city and its citizens by studying the case of Yokohama, Japan's second ...

  15. The Quantum Nature of a Nuclear Phase Transition

    E-Print Network [OSTI]

    Bonasera, A; Wada, R; Hagel, K; Natowitz, J; Sahu, P; Qin, L; Kowalski, S; Keutgen, Th; Materna, T; Nakagawa, T

    2008-01-01

    In their ground states, atomic nuclei are quantum Fermi liquids. At finite temperatures and low densities, these nuclei may undergo a phase change similar to, but substantially different from, a classical liquid gas phase transition. As in the classical case, temperature is the control parameter while density and pressure are the conjugate variables. At variance with the classical case, in the nucleus the difference between the proton and neutron concentrations acts as an additional order parameter, for which the symmetry potential is the conjugate variable. Different ratios of the neutron to proton concentrations lead to different critical points for the phase transition. This is analogous to the phase transitions occurring in $^{4}$He-$^{3}$He liquid mixtures. We present experimental results which reveal the N/Z dependence of the phase transition and discuss possible implications of these observations in terms of the Landau Free Energy description of critical phenomena.

  16. On vosperian and superconnected vertex-transitive digraphs

    E-Print Network [OSTI]

    Hamidoune, Y O; López, S C

    2010-01-01

    We investigate the structure of a digraph having a transitive automorphism group where every cutset of minimal cardinality consists of all successors or all predecessors of some vertex. We improve most of the existing results in this area.

  17. Transition strengths from 10B(e,e')10B

    E-Print Network [OSTI]

    D. J. Millener

    2004-08-16

    Inelastic electron scattering form factors for 10B are fitted with polynomial times Gaussian expressions in the variable y = (bq/2)**2 to extract electromagnetic transition strengths at the photon point.

  18. SUPERCONDUCTING TRANSITION EDGE BOLOMETER AND NOISE IN THIN FILMS

    E-Print Network [OSTI]

    Yeh, Nan-Hsiung

    2011-01-01

    and calculated (---) NEP of transition edge bolometer.performance are described. NEP (noise-equivalent-power)electrical x Io- 15 WHz-1/2 This NEP is within The effective

  19. Usigli's Medio tono and the Transition to Modern Mexican Theatre

    E-Print Network [OSTI]

    Cohen, Deb

    2001-10-01

    Many (including the author himself) consider Rodolfo Usigli to be the father of modern Mexican theatre. In particular, Ramón Layera and others often point to El gesticulador as the play that marks the transition from ...

  20. The ghosts of departed quantities in switches and transitions

    E-Print Network [OSTI]

    Mike R. Jeffrey

    2015-08-18

    Transitions between steady dynamical regimes in diverse applications are often modelled using discontinuities, but doing so introduces problems of uniqueness. No matter how quickly a transition occurs, its inner workings can affect the dynamics of the system significantly. Here we discuss the way transitions can be reduced to discontinuities without trivializing them, by preserving so-called hidden terms. We review the fundamental methodology, its motivations, and where their study seems to be heading. We derive a prototype for piecewise smooth models from the asymptotics of systems with rapid transitions, extending Filippov's convex combinations by encoding the tails of asymptotic series into nonlinear dependence on a switching parameter. We then explore a few examples illustrating the impact of these on our standard picture of smooth or only piecewise smooth dynamics.

  1. Measure Guideline. Transitioning to a Tankless Water Heater

    SciTech Connect (OSTI)

    Brozyna, K.; Rapport, A.

    2012-09-01

    This measure guideline provides information to help residential builders and retrofitters with the design, specification, selection, implementation, installation, and maintenance issues of transitioning from tank-type water heaters to tankless water heaters.

  2. Transitions toward quantum chaos: With supersymmetry from Poisson to Gauss

    SciTech Connect (OSTI)

    Guhr, T. [Center for Chaos and Turbulence Studies, Niels Bohr Institute, Blegdamsvej 17, 2100 Copenhagen O/ (Denmark)] [Center for Chaos and Turbulence Studies, Niels Bohr Institute, Blegdamsvej 17, 2100 Copenhagen O/ (Denmark); [Max Planck Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany)

    1996-08-01

    The transition from arbitrary to chaotic fluctuation properties in quantum systems is studied in a random matrix model. It is assumed that the Hamiltonian can be written as the sum of an arbitrary part and a chaos-producing part. The Gaussian ensembles are used to model the chaotic part. A closed integral representation for all the correlations in the case of broken time reversal invariance is derived by employing supersymmetry and the graded eigenvalue method. In particular, the two level correlation function is expressed as a double integral. For a fixed correlation index, exact diffusion equations are derived for all three universality classes which describe the transition to the chaotic regime from arbitrary initial conditions. As an application, the transition from Poisson regularity to chaos is discussed. The two level correlation function becomes a double integral for all values of the transition parameter. {copyright} 1996 Academic Press, Inc.

  3. Between external and internal space : an urban transition

    E-Print Network [OSTI]

    Cappelletti Daniele

    2012-01-01

    The aim of this dissertation is to explore the evolution of both architecture and urban space, in terms of mutual relationship between solids and voids, with particular attention to two transitional moments of ancient and ...

  4. Development of one-equation transition/turbulence models

    SciTech Connect (OSTI)

    Edwards, J.R.; Roy, C.J.; Blottner, F.G.; Hassan, H.A.

    2000-01-14

    This paper reports on the development of a unified one-equation model for the prediction of transitional and turbulent flows. An eddy viscosity--transport equation for nonturbulent fluctuation growth based on that proposed by Warren and Hassan is combined with the Spalart-Allmaras one-equation model for turbulent fluctuation growth. Blending of the two equations is accomplished through a multidimensional intermittency function based on the work of Dhawan and Narasimha. The model predicts both the onset and extent of transition. Low-speed test cases include transitional flow over a flat plate, a single element airfoil, and a multi-element airfoil in landing configuration. High-speed test cases include transitional Mach 3.5 flow over a 5{degree} cone and Mach 6 flow over a flared-cone configuration. Results are compared with experimental data, and the grid-dependence of selected predictions is analyzed.

  5. Interface Ferroelectric Transition near the Gap-Opening Temperature...

    Office of Scientific and Technical Information (OSTI)

    Interface Ferroelectric Transition near the Gap-Opening Temperature in a Single-Unit-Cell FeSe Film Grown on Nb-DopedSrTiO3Substrate Citation Details In-Document Search This...

  6. Optical properties of two-dimensional transition metal dichalcogenides

    E-Print Network [OSTI]

    Lin, Yuxuan, S.M. Massachusetts Institute of Technology

    2014-01-01

    The re-discovery of the atomically thin transition metal dichalcogenides (TMDs), which are mostly semiconductors with a wide range of band gaps, has diversified the family of two-dimensional materials and boosted the ...

  7. Structural phase transitions and topological defects in ion Coulomb crystals

    SciTech Connect (OSTI)

    Partner, Heather L.; Nigmatullin, Ramil; Burgermeister, Tobias; Keller, Jonas; Pyka, Karsten; Plenio, Martin B.; Retzker, Alex; Zurek, Wojciech Hubert; del Campo, Adolfo; Mehlstaubler, Tanja E.

    2014-11-19

    We use laser-cooled ion Coulomb crystals in the well-controlled environment of a harmonic radiofrequency ion trap to investigate phase transitions and defect formation. Topological defects in ion Coulomb crystals (kinks) have been recently proposed for studies of nonlinear physics with solitons and as carriers of quantum information. Defects form when a symmetry breaking phase transition is crossed non-adiabatically. For a second order phase transition, the Kibble-Zurek mechanism predicts that the formation of these defects follows a power law scaling in the rate of the transition. We demonstrate a scaling of defect density and describe kink dynamics and stability. We further discuss the implementation of mass defects and electric fields as first steps toward controlled kink preparation and manipulation.

  8. Hawking-Page transition in holographic massive gravity

    E-Print Network [OSTI]

    Adams, Allan

    We study the Hawking-Page transition in a holographic model of field theories with momentum dissipation. We find that the deconfinement temperature strictly decreases as momentum dissipation is increased. For sufficiently ...

  9. The Iron Spin Transition in the Earth's Lower Mantle

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

    Print It is now known that the iron present in minerals of the lower mantle of the Earth undergoes a pressure-induced transition with pairing of the spins of its 3d electrons....

  10. Fast identification of transits from light-curves

    E-Print Network [OSTI]

    Pavlos Protopapas; Raul Jimenez; Charles Alcock

    2005-02-15

    We present an algorithm that allows fast and efficient detection of transits, including planetary transits, from light-curves. The method is based on building an ensemble of fiducial models and compressing the data using the MOPED algorithm. We describe the method and demonstrate its efficiency by finding planet-like transits in simulated Pan-STARRS light-curves. We show that that our method is independent of the size of the search space of transit parameters. In large sets of light-curves, we achieve speed up factors of order of $10^{8}$ times over the full $\\chi2$ search. We discuss how the algorithm can be used in forthcoming large surveys like Pan-STARRS and LSST and how it may be optimized for future space missions like Kepler and COROT where most of the processing must be done on board.

  11. Interface Ferroelectric Transition near the Gap-Opening Temperature...

    Office of Scientific and Technical Information (OSTI)

    Ferroelectric Transition near the Gap-Opening Temperature in a Single-Unit-Cell FeSe Film Grown on Nb-Doped SrTiO 3 Substrate Citation Details In-Document Search This content...

  12. Phase transition in the Jarzynski estimator of free energy differences

    E-Print Network [OSTI]

    Suarez Gonzalez, Alberto

    The transition between a regime in which thermodynamic relations apply only to ensembles of small systems coupled to a large environment and a regime in which they can be used to characterize individual macroscopic systems ...

  13. Review: The Transition Handbook: From Oil Dependency to Local Resilience

    E-Print Network [OSTI]

    Alkhoury, Alex

    2010-01-01

    a useful starting point into peak oil and transition issuesThe intertwined emergencies of peak oil and climate changenow widely understood as ‘peak oil’: as the production of

  14. Thermodynamic and morphological transitions in crystalline and soft material interfaces

    E-Print Network [OSTI]

    Tang, Ming, Ph. D. Massachusetts Institute of Technology

    2008-01-01

    Interfaces are defects present in all materials. Interface transitions are characterized by abrupt changes in interface structure, chemistry and/or morphology under suitable conditions. They exist in many material systems ...

  15. The transition from two phase bubble flow to slug flow

    E-Print Network [OSTI]

    Radovcich, Nick A.

    1962-01-01

    The process of transition from bubble to slug flow in a vertical pipe has been studied analytically and experimentally. An equation is presented which gives the agglomeration time as a function of void fraction, channel ...

  16. Uncertainties in nuclear transition matrix elements of neutrinoless ?? decay

    SciTech Connect (OSTI)

    Rath, P. K.

    2013-12-30

    To estimate the uncertainties associated with the nuclear transition matrix elements M{sup (K)} (K=0?/0N) for the 0{sup +} ? 0{sup +} transitions of electron and positron emitting modes of the neutrinoless ?? decay, a statistical analysis has been performed by calculating sets of eight (twelve) different nuclear transition matrix elements M{sup (K)} in the PHFB model by employing four different parameterizations of a Hamiltonian with pairing plus multipolar effective two-body interaction and two (three) different parameterizations of Jastrow short range correlations. The averages in conjunction with their standard deviations provide an estimate of the uncertainties associated the nuclear transition matrix elements M{sup (K)} calculated within the PHFB model, the maximum of which turn out to be 13% and 19% owing to the exchange of light and heavy Majorana neutrinos, respectively.

  17. Indirect L to T point optical transition in bismuth nanowires

    E-Print Network [OSTI]

    Levin, A. J.

    An indirect electronic transition from the L point valence band to the T point valence band has been previously observed in Bi nanowires oriented along the [011? 2] crystalline direction (used by Black et al. and by Reppert ...

  18. The Quantum Nature of a Nuclear Phase Transition

    E-Print Network [OSTI]

    A. Bonasera; Z. Chen; R. Wada; K. Hagel; J. Natowitz; P. Sahu; L. Qin; S. Kowalski; Th. Keutgen; T. Materna; T. Nakagawa

    2008-03-26

    In their ground states, atomic nuclei are quantum Fermi liquids. At finite temperatures and low densities, these nuclei may undergo a phase change similar to, but substantially different from, a classical liquid gas phase transition. As in the classical case, temperature is the control parameter while density and pressure are the conjugate variables. At variance with the classical case, in the nucleus the difference between the proton and neutron concentrations acts as an additional order parameter, for which the symmetry potential is the conjugate variable. Different ratios of the neutron to proton concentrations lead to different critical points for the phase transition. This is analogous to the phase transitions occurring in $^{4}$He-$^{3}$He liquid mixtures. We present experimental results which reveal the N/Z dependence of the phase transition and discuss possible implications of these observations in terms of the Landau Free Energy description of critical phenomena.

  19. Production Operations Level: Transition-To-Lean Roadmap

    E-Print Network [OSTI]

    Lean Advancement Initiative

    2000-06-05

    This paper provides a roadmap for transitioning an existing production operation to one that fully implements a lean manufacturing philosophy. Integration of engineering, human resources, and business viewpoints are ...

  20. Effective scalar field theory for the electroweak phase transition

    E-Print Network [OSTI]

    Karsch, Frithjof; Patkós, András

    1994-01-01

    We investigate an effective model for the finite temperature restoration phase transition of the electroweak theory. It is obtained by dimensional reduction of the 3+1 dimensional full theory and by subsequent integration over all static gauge degrees of freedom. The resulting theory corresponds to a 3-dimensional O(4) ferromagnet containing cubic and quartic terms of the field in its potential function. Possible nonperturbative effects of a magnetic screening mass are parametrically included in the potential. We analyse the theory using mean field and numerical Monte Carlo (MC) simulation methods. At the value of the physical Higgs mass m_H=37~{\\rm GeV}, considered in the present investigation, we find a discontinuous symmetry restoring phase transition. We determine the critical temperature, order parameter jump, interface tension and latent heat characteristics of the transition. The Monte Carlo results indicate a somewhat weaker first order phase transition as compared to the mean field treatment, demonst...

  1. Update from the NREL Alternative Fuel Transit Bus Evaluation Program

    SciTech Connect (OSTI)

    Chandler, K.; Norton, P.; Clark, N.

    1999-05-01

    The object of this project, which is supported by the U.S. Department of Energy (DOE) through the National Renewable Energy Laboratory (NREL), is to provide a comprehensive comparison of heavy-duty urban transit buses operating on alternative fuels and diesel fuel. Final reports from this project were produced in 1996 from data collection and evaluation of 11 transit buses from eight transit sites. With the publication of these final reports, three issues were raised that needed further investigation: (1) the natural gas engines studied were older, open-loop control engines; (2) propane was not included in the original study; and (3) liquefied natural gas (LNG) was found to be in the early stages of deployment in transit applications. In response to these three issues, the project has continued by emissions testing newer natural gas engines and adding two new data collection sites to study the newer natural gas technology and specifically to measure new technology LNG buses.

  2. King County Metro Transit Hybrid Articulated Buses: Final Evaluation Results

    SciTech Connect (OSTI)

    Chandler, K.; Walkowicz, K.

    2006-12-01

    Final technical report compares and evaluates new diesel and diesel hybrid-electric articulated buses operated as part of the King County Metro Transit (KC Metro) fleet in Seattle, Washington. The evaluation lasted 12 months.

  3. Tuning of the Metal-Insulator Transition via Alkali Adsorption

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

    Tuning of the Metal-Insulator Transition via Alkali Adsorption Print Turning a material from an insulator to a metal, or vice versa, by light irradiation, exposure to electric or...

  4. Transit Access and Regional Coordination in Metropolitan Detroit

    E-Print Network [OSTI]

    LaRose, Jeremiah; Netto, Alyssa; Thomas, Trevor

    2014-01-01

    groups on both sides of Detroit’s borders, and a great dealbadly needed transit service in Detroit. Planetizen, May 22.Coordination in Metropolitan Detroit Jeremiah LaRose, MURP '

  5. First-order electroweak phase transition in the standard model...

    Office of Scientific and Technical Information (OSTI)

    first-order phase transition to develop even with a Higgs boson mass well above the current direct limit of 114 GeV. The phisup 6 term can be generated for instance by...

  6. Strategy Guideline. Transitioning HVAC Companies to Whole House Performance Contractors

    SciTech Connect (OSTI)

    Burdick, Arlan

    2012-05-01

    This report describes the findings from research IBACOS conducted related to heating, ventilation, and air conditioning (HVAC) companies who have made the decision to transition to whole house performance contracting (WHPC).

  7. Transition density and pressure in hot neutron stars 

    E-Print Network [OSTI]

    Xu, Jun; Chen, Lie-Wen; Ko, Che Ming; Li, Bao-An.

    2010-01-01

    Using the momentum-dependent effective interaction (MDI) for nucleons, we have studied the transition density and pressure at the boundary between the inner crust and the liquid core of hot neutron stars. We find that their values are larger...

  8. Photochemical reductive elimination of halogen from transition metal complexes

    E-Print Network [OSTI]

    Cook, Timothy R. (Timothy Raymond), 1982-

    2010-01-01

    This thesis is focused on the synthesis and study of transition metal complexes that undergo halogen elimination when irradiated with UV and visible light. This chemistry is relevant for solar energy storage schemes in ...

  9. Charge, orbital and magnetic ordering in transition metal oxides 

    E-Print Network [OSTI]

    Senn, Mark Stephen

    2013-06-29

    Neutron and x-ray diffraction has been used to study charge, orbital and magnetic ordering in some transition metal oxides. The long standing controversy regarding the nature of the ground state (Verwey structure) of the ...

  10. Polarons and Mobile Impurities Near a Quantum Phase Transition

    E-Print Network [OSTI]

    Shadkhoo, Shahriar

    2015-01-01

    108 Dimensionless energy g(x) of a radial modulation profile38 2.11 The energy-landscape for (a) below the transition, (shows the minimized ground-state energy as a function of the

  11. Photoinduced phase transitions studied by femtosecond single-shot spectroscopy

    E-Print Network [OSTI]

    Shin, Taeho

    2010-01-01

    Single-shot femtosecond spectroscopy has been developed and employed for the study of phase transitions of solid-state materials. Using two crossed echelons, a two dimensional spatial delay gradient was generated across a ...

  12. Fact #558: February 16, 2009 Transit Vehicle Age and Cost

    Broader source: Energy.gov [DOE]

    Heavy rail cars have the greatest longevity of the transit vehicles listed below with an average vehicle age of more than 22 years. However, in terms of cost for purchasing a new rail car, heavy...

  13. MEMORANDUM FOR ELIZABETH MONTOYA TRANSITION TEAM FROM THOMAS...

    Energy Savers [EERE]

    g December 1, 200S MEMORANDUM FOR ELIZABETH MONTOYA TRANSITION TEAM FROM THOMAS N. PYKE, J CHIEF INFORMATION OFFICER SUBJECT: Follow-up to our meeting this morning Carl Staton...

  14. Excavating L.A. : urban design futures of new transit

    E-Print Network [OSTI]

    Mizuhara, Midori

    2013-01-01

    After decades of planning, recent voter approved tax initiatives have enabled Los Angeles to expand its mass transit infrastructure. Fast tracked construction projects of subway and light rail lines will connect areas of ...

  15. Effect of Chemical Pressure on the Charge Density Wave Transition...

    Office of Scientific and Technical Information (OSTI)

    Effect of Chemical Pressure on the Charge Density Wave Transition in Rare-Earth Tritellurides RTe3 Citation Details In-Document Search Title: Effect of Chemical Pressure on the...

  16. Non-Equilibrium Phase Transition in Rapidly Expanding Matter

    E-Print Network [OSTI]

    I. N. Mishustin

    1999-04-29

    Non-equilibrium features of a first order phase transition from the quark-gluon plasma to a hadronic gas in relativistic heavy-ion collisions are discussed. It is demonstrated that strong collective expansion may lead to the fragmentation of the plasma phase into droplets surrounded by undersaturated hadronic gas. Subsequent hadronization of droplets will generate strong non-statistical fluctuations in the hadron rapidity distribution in individual events. The strongest fluctuations are expected in the vicinity of the phase transition threshold.

  17. Do X-ray Binary Spectral State Transition Luminosities Vary?

    E-Print Network [OSTI]

    Thomas J. Maccarone

    2003-08-02

    We tabulate the luminosities of the soft-to-hard state transitions of all X-ray binaries for which there exist good X-ray flux measurements at the time of the transition, good distance estimates, and good mass estimates for the compact star. We show that the state transition luminosities are at about 1-4% of the Eddington rate, markedly smaller than those typically quoted in the literature, with a mean value of 2%. Only the black hole candidate GRO J~1655-40 and the neutron star systems Aql X-1 and 4U 1728-34 have measured state transition luminosities inconsistent with this value at the 1$\\sigma$ level. GRO J~1655-40, in particular, shows a state transition luminosity below the mean value for the other sources at the $4\\sigma$ level. This result, combined with the known inner disk inclination angle (the disk is nearly parallel to the line of sight) from GRO J~1655-40's relativistic jets suggest that the hard X-ray emitting region in GRO J~1655-40 can have a velocity of no more than about $\\beta=0.68$, with a most likely value of about $\\beta=0.52$, and a minimum speed of $\\beta=0.45$, assuming that the variations in state transition luminosities are solely due to relativistic beaming effects. The variance in the state transition luminosities suggests an emission region with a velocity of $\\sim0.2c$. The results are discussed in terms of different emission models for the low/hard state. We also discuss the implications for measuring the dimensionless viscosity parameter $\\alpha$. We also find that if its state transitions occur at typical luminosities, then GX 339-4 is likely to be at a distance of at least 7.6 kpc, much further than typically quoted estimates.

  18. Fission and Nuclear Liquid-Gas Phase Transition

    E-Print Network [OSTI]

    E. A. Cherepanov; V. A. Karnaukhov

    2007-03-30

    The temperature dependence of the liquid-drop fission barrier is considered, the critical temperature for the liquid-gas phase transition in nuclear matter being a parameter. Experimental and calculated data on the fission probability are compared for highly excited $^{188}$Os. The calculations have been made in the framework of the statistical model. It is concluded that the critical temperature for the nuclear liquid--gas phase transition is higher than 16 MeV.

  19. Reforming the Power Sector in Transition: Do Institutions Matter?

    E-Print Network [OSTI]

    Nepal, Rabindra; Jamasb, Tooraj

    and Uzbekistan. Besides these countries, Turkey and Mongolia are also included in the group of transition economies as per European Bank of Reconstruction and Development (EBRD) areas of operation. 2 For instance, the oil and gas exports for Turkmenistan... ). Stiglitz (1999) argues that the enforcement mechanisms of reforms (including  power  sector  reforms) were weak  as  the  state’s  legal  and  judicial  capacities were  limited during the transition process brewing inefficient rent...

  20. Superlubric-Pinned Transition in Sliding Incommensurate Colloidal Monolayers

    E-Print Network [OSTI]

    Davide Mandelli; Andrea Vanossi; Michele Invernizzi; S. V. Paronuzzi Ticco; Nicola Manini; Erio Tosatti

    2015-08-01

    Two-dimensional (2D) crystalline colloidal monolayers sliding over a laser-induced optical lattice recently emerged as a new tool for the study of friction between ideal crystal surfaces. Here we focus in particular on static friction, the minimal sliding force necessary to depin one lattice from the other. If the colloid and the optical lattices are mutually commensurate, the colloid sliding is always pinned by static friction; but when they are incommensurate the presence or absence of pinning can be expected to depend upon the system parameters. If a 2D analogy to the mathematically established Aubry transition of one-dimensional systems were to hold, an increasing periodic corrugation strength $U_0$ should turn an initially free-sliding monolayer into a pinned state through a well-defined dynamical phase transition. We address this problem by the simulated sliding of a realistic model 2D colloidal lattice, confirming the existence of a clear and sharp superlubric-pinned transition for increasing corrugation strength. Unlike the 1D Aubry transition which is continuous, the 2D transition exhibits a definite first-order character. With no change of symmetry, the transition entails a structural character, with a sudden increase of the colloid-colloid interaction energy, accompanied by a compensating downward jump of the colloid-corrugation energy. The transition value for the corrugation amplitude $U_0$ depends upon the misalignment angle $\\theta$ between the optical and the colloidal lattices, superlubricity surviving until larger corrugations for angles away from the energetically favored orientation, which is itself generally slightly misaligned, as shown in recent work. The observability of the superlubric-pinned colloid transition is proposed and discussed.

  1. Managing the Transition State for Energy Strategic Planning 

    E-Print Network [OSTI]

    Koehler, T. A.

    1986-01-01

    THE TRANSITION STATE FOR ENERGY STRATEGIC PLANNING a Thomas A. Koehler Eastman Kodak Company Rochester, New York ABSTRACT Corporate energy conservation programs have made substantial gains in reducing energy consumption during the last decade.... The responses to survive the mid-1970's global energy uncertainties were made in a crisis environment. Now, there is a transition from energy conservation to energy strategic planning. Energy engineers and managers need to im prove their managerial skills...

  2. Transition Radiation from the Neutrino-Photon Interaction in Matter

    E-Print Network [OSTI]

    Juan Carlos D'Olivo; José Antonio Loza

    2012-02-22

    We show that, because of their effective electromagnetic interaction in matter, transition radiation is emitted whenever neutrinos goes across the boundary between two media with different indices of refraction. This effect occurs in the context of the standard model and does not depend on any exotic neutrino property. We examine such a phenomena and compare it with the transition radiation of a neutrino endowed with an intrinsic dipole moment.

  3. Transition from inspiral to plunge for eccentric equatorial Kerr orbits

    E-Print Network [OSTI]

    R. O'Shaughnessy

    2002-11-07

    Ori and Thorne have discussed the duration and observability (with LISA) of the transition from circular, equatorial inspiral to plunge for stellar-mass objects into supermassive ($10^{5}-10^{8}M_{\\odot}$) Kerr black holes. We extend their computation to eccentric Kerr equatorial orbits. Even with orbital parameters near-exactly determined, we find that there is no universal length for the transition; rather, the length of the transition depends sensitively -- essentially randomly -- on initial conditions. Still, Ori and Thorne's zero-eccentricity results are essentially an upper bound on the length of eccentric transitions involving similar bodies (e.g., $a$ fixed). Hence the implications for observations are no better: if the massive body is $M=10^{6}M_{\\odot}$, the captured body has mass $m$, and the process occurs at distance $d$ from LISA, then $S/N \\lesssim (m/10 M_{\\odot})(1\\text{Gpc}/d)\\times O(1)$, with the precise constant depending on the black hole spin. For low-mass bodies ($m \\lesssim 7 M_\\odot$) for which the event rate is at least vaguely understood, we expect little chance (probably [much] less than 10%, depending strongly on the astrophysical assumptions) of LISA detecting a transition event with $S/N>5$ during its run; however, even a small infusion of higher-mass bodies or a slight improvement in LISA's noise curve could potentially produce $S/N>5$ transition events during LISA's lifetime.

  4. Using color photometry to separate transiting exoplanets from false positives

    E-Print Network [OSTI]

    B. Tingley

    2004-07-14

    The radial velocity technique is currently used to classify transiting objects. While capable of identifying grazing binary eclipses, this technique cannot reliably identify blends, a chance overlap of a faint background eclipsing binary with an ordinary foreground star. Blends generally have no observable radial velocity shifts, as the foreground star is brighter by several magnitudes and therefore dominates the spectrum, but their combined light can produce events that closely resemble those produced by transiting exoplanets. The radial velocity technique takes advantage of the mass difference between planets and stars to classify exoplanet candidates. However, the existence of blends renders this difference an unreliable discriminator. Another difference must therefore be utilized for this classification -- the physical size of the transiting body. Due to the dependence of limb darkening on color, planets and stars produce subtly different transit shapes. These differences can be relatively weak, little more than 1/10th the transit depth. However, the presence of even small color differences between the individual components of the blend increases this difference. This paper will show that this color difference is capable of discriminating between exoplanets and blends reliably, theoretically capable of classifying even terrestrial-class transits, unlike the radial velocity technique.

  5. Spatio-temporal evolution of the H ? L back transition

    SciTech Connect (OSTI)

    Miki, K.; Center for Computational Science and e-Systems, Japan Atomic Energy Agency, Chiba 277-8587 ; Diamond, P. H.; Center for Momentum Transport and Flow Organization, University of California, San Diego, California 92093 ; Schmitz, L.; McDonald, D. C.; Estrada, T.; Gürcan, Ö. D.; Tynan, G. R.

    2013-06-15

    Since ITER will operate close to threshold and with limited control, the H ? L back transition is a topic important for machine operations as well as physics. Using a reduced mesoscale model [Miki et al., Phys. Plasmas 19, 092306 (2012)], we investigate ELM-free H ? L back transition dynamics in order to isolate transport physics effects. Model studies indicate that turbulence spreading is the key process which triggers the back transition. The transition involves a feedback loop linking turbulence and profiles. The I-phase appears during the back transition following a slow power ramp down, while fast ramp-downs reveal a single burst of zonal flow during the back transition. The I-phase nucleates at the pedestal shoulder, as this is the site of the residual turbulence in H-mode. Hysteresis in the profile gradient scale length is characterized by the Nusselt number, where Nu=?{sub i,turb}/?{sub i,neo}. Relative hysteresis of temperature gradient vs density gradient is sensitive to the pedestal Prandtl number, where Pr{sub ped}=D{sub ped}/?{sub i,neo}. We expect the H-mode to be somewhat more resilient in density than in temperature.

  6. Spin transition in a four-coordinate iron oxide

    SciTech Connect (OSTI)

    Kawakami, T. [Nihon University, Tokyo; Sutou, S. [Nihon University, Tokyo; Hirama, H. [Nihon University, Tokyo; Sekiya, Y. [Nihon University, Tokyo; Makino, T. [Nihon University, Tokyo; Tsujimoto, Y. [Kyoto University, Japan; Kitada, A. [Kyoto University, Japan; Tassel, C. [Kyoto University, Japan; Kageyama, H. [Kyoto University, Japan; Yoshimura, K. [Kyoto University, Japan; Chen, Xingqiu [ORNL; Fu, Chong Long [ORNL; Okada, T. [University of Tokyo, Tokyo, Japan; Yagi, T. [University of Tokyo, Tokyo, Japan; Hayashi, N. [Kyoto University, Japan; Nasu, S. [Osaka University; Podloucky, R. [Institut fur Physikalische Chemie der RWTH; Takano, M. [Kyoto University, Japan

    2009-01-01

    The spin transition, or spin crossover, is a manifestation of electronic instability induced by external constraints such as pressure1. Among known examples that exhibit spin transition, 3d ions with d6 electron configurations represent the vast majority, but the spin transition observed thus far has been almost exclusively limited to that between high-spin (S = 2) and low-spin (S = 0) states2-9. Here we report a novel high-spin to intermediate-spin (S = 1) state transition at 33 GPa induced by pressurization of an antiferromagnetic insulator SrFeO2 with a square planar coordination10. The change in spin multiplicity brings to ferromagnetism as well as metallicity, yet keeping the ordering temperature far above ambient. First-principles calculations attribute the origin of the transition to the strong inlayer hybridization between Fe dx 2 -y 2 O p , leading to a pressure-induced electronic instability toward the depopulation of Fe dx 2 -y 2 O p antibonding states. Furthermore, the ferromagnetic S = 1 state is half-metallic due to the inception of half-occupied spin-down (dxz, dyz) degenerate states upon spin transition. These results highlight the square-planar coordinated iron oxides as a new class of magnetic and electric materials and provide new avenues toward realizing multi-functional sensors and data-storage devices.

  7. The value of automated fare collection data for transit planning : an example of rail transit OD matrix estimation

    E-Print Network [OSTI]

    Gordillo, Fabio

    2006-01-01

    Traditionally, transit agencies across the world have relied on traveler surveys and manual counts to inform many of their service and operations planning decisions. Today, many agencies can add to their existing planning ...

  8. Nonperturbative Effects on the Ferromagnetic Transition in Repulsive Fermi Gases

    E-Print Network [OSTI]

    Lianyi He; Xu-Guang Huang

    2012-04-26

    It is generally believed that a dilute spin-1/2 Fermi gas with repulsive interactions can undergo a ferromagnetic phase transition to a spin-polarized state at a critical gas parameter $(k_{\\rm F}a)_c$. Previous theoretical predictions of the ferromagnetic phase transition have been based on the perturbation theory, which treats the gas parameter as a small number. On the other hand, Belitz, Kirkpatrick, and Vojta (BKV) have argued that the phase transition in clean itinerant ferromagnets is generically of first order at low temperatures, due to the correlation effects that lead to a nonanalytic term in the free energy. The second-order perturbation theory predicts a first-order phase transition at $(k_{\\rm F}a)_c=1.054$, consistent with the BKV argument. However, since the critical gas parameter is expected to be of order O(1), perturbative predictions may be unreliable. In this paper we study the nonperturbative effects on the ferromagnetic phase transition by summing the particle-particle ladder diagrams to all orders in the gas parameter. We consider a universal repulsive Fermi gas where the effective range effects can be neglected, which can be realized in a two-component Fermi gas of $^6$Li atoms by using a nonadiabatic field switch to the upper branch of a Feshbach resonance with a positive s-wave scattering length. Our theory predicts a second-order phase transition, which indicates that ferromagnetic transition in dilute Fermi gases is possibly a counterexample to the BKV argument. The predicted critical gas parameter $(k_{\\rm F}a)_c=0.858$ is in good agreement with the recent quantum Monte Carlo result $(k_{\\rm F}a)_c=0.86$ for a nearly zero-range potential [S. Pilati, \\emph{et al}., Phys. Rev. Lett. {\\bf 105}, 030405 (2010)]. We also compare the spin susceptibility with the quantum Monte Carlo result and find good agreement.

  9. Fidelity Between Partial States as Signature of Quantum Phase Transitions N. Paunkovic

    E-Print Network [OSTI]

    Lisboa, Universidade Técnica de

    fidelity approach to quantum phase transitions. We consider a superconducting lattice with a magnetic

  10. From multiplicative noise to directed percolation in wetting transitions F. Ginelli,1,2

    E-Print Network [OSTI]

    Ahlers, Volker - Fakultät IV

    and investigated. Upon varying a control parameter, the critical behavior observed along the transition line

  11. THE TRANSITION TO SECONDARY SCHOOL: The experiences of black and minority ethnic

    E-Print Network [OSTI]

    Strathclyde, University of

    Coping with a New Environment .......................................................... 15 Racism........................................................................... 18 Problems with Racism During Transition.............................................. 19

  12. Resonant Ultrasound Studies of Complex Transition Metal Oxides

    SciTech Connect (OSTI)

    Dr. Henry Bass; Dr. J. R. Gladden

    2008-08-18

    Department of Energy EPSCoR The University of Mississippi Award: DE-FG02-04ER46121 Resonant Ultrasound Spectroscopy Studies of Complex Transition Metal Oxides The central thrust of this DOE funded research program has been to apply resonant ultrasound spectroscopy (RUS), an elegant and efficient method for determining the elastic stiffness constants of a crystal, to the complex and poorly understood class of materials known as transition metal oxides (TMOs). Perhaps the most interesting and challenging feature of TMOs is their strongly correlated behavior in which spin, lattice, and charge degrees of freedom are strongly coupled. Elastic constants are a measure of the interatomic potentials in a crystal and are thus sensitive probes into the atomic environment. This sensitivity makes RUS an ideal tool to study the coupling of phase transition order parameters to lattice strains. The most significant result of the project has been the construction of a high temperature RUS apparatus capable of making elastic constant measurements at temperatures as high as 1000 degrees Celsius. We have designed and built novel acoustic transducers which can operate as high as 600 degrees Celsius based on lithium niobate piezoelectric elements. For measurement between 600 to 1000 C, a buffer rod system is used in which the samples under test and transducers are separated by a rod with low acoustic attenuation. The high temperature RUS system has been used to study the charge order (CO) transition in transition metal oxides for which we have discovered a new transition occurring about 35 C below the CO transition. While the CO transition exhibits a linear coupling between the strain and order parameter, this new precursor transition shows a different coupling indicating a fundamentally different mechanism. We have also begun a study, in collaboration with the Jet Propulsion Laboratory, to study novel thermoelectric materials at elevated temperatures. These materials include silicon germanium with various doping and Zintl phase materials. Such materials show promise for increased figures of merit, vital to making thermolectrics competitive with traditional power generation mechanisms.

  13. Phase transitions in the distribution of inelastically colliding inertial particles

    E-Print Network [OSTI]

    Sergey Belan; Alexander Chernykh; Gregory Falkovich

    2015-05-14

    It was recently suggested that the sign of particle drift in inhomogeneous temperature or turbulence depends on the particle inertia: weakly inertial particles localize near minima of temperature or turbulence intensity (effects known as thermophoresis and turbophoresis), while strongly inertial particles fly away from minima in an unbounded space. The problem of a particle near minima of turbulence intensity is related to that of two particles in a random flow, so that the localization-delocalization transition in the former corresponds to the path-coalescence transition in the latter. The transition is signaled by the sign change of the Lyapunov exponent that characterizes the mean rate of particle approach to the minimum (which could be wall or another particle). Here we solve analytically this problem for inelastic collisions and derive the phase diagram for the transition in the inertia-inelasticity plane. An important feature of the phase diagram is the region of inelastic collapse: if the restitution coefficient of particle velocity is smaller than some critical value, then the particle is localized for any inertia. We present direct numerical simulations which support the theory and in addition reveal the dependence of the transition of the flow correlation time, characterized by the Stokes number.

  14. Predicting the Yields of Photometric Surveys for Transiting Planets

    E-Print Network [OSTI]

    Thomas G. Beatty

    2008-07-01

    Observing extrasolar planetary transits is one of the only ways that we may infer the masses and radii of planets outside the Solar System. As such, the detections made by photometric transit surveys are one of the only foreseeable ways that the areas of planetary interiors, system dynamics, migration, and formation will acquire more data. Predicting the yields of these surveys therefore serves as a useful statistical tool. Predictions allows us to check the efficiency of transit surveys (``are we detecting all that we should?'') and to test our understanding of the relevant astrophysics (``what parameters affect predictions?''). Furthermore, just the raw numbers of how many planets will be detected by a survey can be interesting in its own right. Here, we look at two different approaches to modeling predictions (forward and backward), and examine three different transit surveys (TrES, XO, and Kepler). In all cases, making predictions provides valuable insight into both extrasolar planets and the surveys themselves, but this must be tempered by an appreciation of the uncertainties in the statistical cut-offs used by the transit surveys.

  15. Strategies to address transition costs in the electricity industry

    SciTech Connect (OSTI)

    Baxter, L.; Hadley, S.; Hirst, E.

    1996-07-01

    Transition costs are the potential monetary losses that electric- utility shareholders, ratepayers, or other parties might experience because of structural changes in the electricity industry. Regulators, policy analysts, utilities, and consumer groups have proposed a number of strategies to address transition costs, such as immediately opening retail electricity markets or delaying retail competition. This report has 3 objectives: identify a wide range of strategies available to regulators and utilities; systematically examine effects of strategies; and identify potentially promising strategies that may provide benefits to more than one set of stakeholders. The many individual strategies are grouped into 6 major categories: market actions, depreciation options, rate-making actions, utility cost reductions, tax measures, and other options. Of the 34 individual strategies, retail ratepayers have primary or secondary responsibility for paying transition costs in 19 of the strategies, shareholders in 12, wheeling customers in 11, taxpayers in 8, and nonutility suppliers in 4. Most of the strategies shift costs among different segments of the economy, although utility cost reductions can be used to offset transition costs. Most of the strategies require cooperation of other parties, including regulators, to be implemented successfully; financial stakeholders must be engages in negotiations that hold the promise of shared benefits. Only by rejecting ``winner-take-all`` strategies will the transition-cost issue be expeditiously resolved.

  16. Successive phase transitions and kink solutions in ??, ?¹?, and ?¹² field theories

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

    Khare, Avinash; Christov, Ivan C.; Saxena, Avadh

    2014-08-27

    We obtain exact solutions for kinks in ??, ?¹?, and ?¹² field theories with degenerate minima, which can describe a second-order phase transition followed by a first-order one, a succession of two first-order phase transitions and a second-order phase transition followed by two first-order phase transitions, respectively. Such phase transitions are known to occur in ferroelastic and ferroelectric crystals and in meson physics. In particular, we find that the higher-order field theories have kink solutions with algebraically-decaying tails and also asymmetric cases with mixed exponential-algebraic tail decay, unlike the lower-order ?? and ?? theories. Additionally, we construct distinct kinks withmore »equal energies in all three field theories considered, and we show the co-existence of up to three distinct kinks (for a ?¹² potential with six degenerate minima). We also summarize phonon dispersion relations for these systems, showing that the higher-order field theories have specific cases in which only nonlinear phonons are allowed. For the ?¹? field theory, which is a quasi-exactly solvable (QES) model akin to ??, we are also able to obtain three analytical solutions for the classical free energy as well as the probability distribution function in the thermodynamic limit.« less

  17. Office of Legacy Management. Information and Records Management. Transition Guidance

    SciTech Connect (OSTI)

    none,

    2004-03-01

    The Office of Legacy Management (LM) is an integral part of the U.S. Department of Energy’s (DOE’s) strategy to ensure that legacy liabilities of former nuclear weapons production sites are properly managed following the completion of environmental cleanup activities. LM will work with each site using an integrated team approach to ensure a successful transition. Part of this process will include transition of Government records and information. The Office of Legacy Management Information and Records Management Transition Guidance focuses on LM’s goal to preserve and protect legacy records and information. This guidance document establishes a framework for the transfer of records management responsibilities for sites transferring to LM. It describes the requirements, responsibilities, and procedures for the efficient and cost-effective transfer of custody, ownership, and management of records and other information products from the transfer site to LM. Records management practices are critical to the functions of Federal agencies because records provide information about, or evidence of, the organization, functions, policies, decisions, procedures, operations, or other activities. Therefore, the information generated by an agency is created, maintained, and dispositioned through records management processes that ensure the appropriate preservation and retrieval of essential information. Because of their intrinsic value, best practices to preserve information and records should be utilized when records are transferred from one organization to another. As the transfer program completes cleanup activities at closure sites, a transitional process will facilitate the transparent shift in the management of site records activities to LM. The roles and responsibilities of the transfer site and/or program and LM described in this document are a necessary foundation for cooperation and coordination and are essential to the successful transition of records and information responsibilities. The DOE Office of the Chief Information Officer (OCIO) has a central role in DOE records management by providing guidance, expertise, and coordination to all DOE offices and organizations and coordination with the National Archives and Records Administration (NARA). LM and the transfer site will complete an integrated transition plan which will integrate all transition elements including information and records. As part of the overall transition plan, an Information and Records Transition Plan will be developed consistent with the integrated transition plan for the site transfer and included as an attachment. The Information and Records Management Transition Plan will be developed to assist both organizations in organizing the tasks; establishing a timetable and milestones for their completion; and identifying manpower, funding and other resources that will be needed to complete the ownership transfer. In addition, the plan will provide a valuable exchange of institutional knowledge that will assist LM in meeting the obligations of responsibly managing legacy records. Guidance for the development of the plan is included in this document. Records management concerns that may arise during site closure, such as management support, contract language and agreements, interactions with the OCIO and NARA, resource and budget considerations, and procedures to safeguard records are addressed. Guidelines and criteria for records management transition activities are also provided. These include LM expectations for the inventory, scheduling, and disposition of records; the management and transfer of electronic files, including databases and software; records finding aids, indices, and recordkeeping systems; and the process for the transfer of hard copy and electronic records to LM.

  18. Chirality transitions in frustrated $S^{2}$-valued spin systems

    E-Print Network [OSTI]

    Marco Cicalese; Matthias Ruf; Francesco Solombrino

    2015-03-17

    We study the discrete-to-continuum limit of the helical XY $S^{2}$-spin system on the lattice $\\mathbb{Z}^{2}$. We scale the interaction parameters in order to reduce the model to a spin chain in the vicinity of the Landau-Lifschitz point and we prove that at the same energy scaling under which the $S^{1}$-model presents scalar chirality transitions, the cost of every vectorial chirality transition is now zero. In addition we show that if the energy of the system is modified penalizing the distance of the $S^{2}$ field from a finite number of copies of $S^{1}$, it is still possible to prove the emergence of nontrivial (possibly trace dependent) chirality transitions.

  19. Dissociation and dissociative phase transition in dense hydrogen

    SciTech Connect (OSTI)

    Khomkin, A. L. Shumikhin, A. S.

    2012-01-15

    A simple physical model is proposed for dissociating dense fluid hydrogen. We propose that free dissociated atoms interact via quantum electron-electron exchange analogously to the interaction in the liquid-metal phase of alkali metals. The density dependence of a hydrogen atom's binding energy in such a quasi-liquid is calculated. It is shown that the transition from the molecular fluid to liquid hydrogen is a first-order phase transition. The critical parameters of the transition are determined: P{sub c} = 72 GPa, T{sub c} = 10500 K, and {rho}{sub c} = 0.5 g/cm{sup 3}. The possibility of the metastable existence of atomic liquid hydrogen in a dissociated molecular fluid under decreased pressure is established.

  20. Transition state theory for laser-driven reactions

    SciTech Connect (OSTI)

    Kawai, Shinnosuke; Bandrauk, Andre D.; Jaffe, Charles; Bartsch, Thomas; Palacian, Jesus; Uzer, T.

    2007-04-28

    Recent developments in transition state theory brought about by dynamical systems theory are extended to time-dependent systems such as laser-driven reactions. Using time-dependent normal form theory, the authors construct a reaction coordinate with regular dynamics inside the transition region. The conservation of the associated action enables one to extract time-dependent invariant manifolds that act as separatrices between reactive and nonreactive trajectories and thus make it possible to predict the ultimate fate of a trajectory. They illustrate the power of our approach on a driven Henon-Heiles system, which serves as a simple example of a reactive system with several open channels. The present generalization of transition state theory to driven systems will allow one to study processes such as the control of chemical reactions through laser pulses.

  1. Transition redshift in $f(T)$ cosmology and observational constraints

    E-Print Network [OSTI]

    Salvatore Capozziello; Orlando Luongo; Emmanuel N. Saridakis

    2015-06-18

    We extract constraints on the transition redshift $z_{tr}$, determining the onset of cosmic acceleration, predicted by an effective cosmographic construction, in the framework of $f(T)$ gravity. In particular, employing cosmography we obtain bounds on the viable $f(T)$ forms and their derivatives. Since this procedure is model independent, as long as the scalar curvature is fixed, we are able to determine intervals for $z_{tr}$. In this way we guarantee that the Solar-System constraints are preserved and moreover we extract bounds on the transition time and the free parameters of the scenario. We find that the transition redshifts predicted by $f(T)$ cosmology, although compatible with the standard $\\Lambda$CDM predictions, are slightly smaller. Finally, in order to obtain observational constraints on $f(T)$ cosmology, we perform a Monte Carlo fitting using supernova data, involving the most recent union 2.1 data set.

  2. Nonequilibrium Glass Transition in Mixtures of Active-Passive Particles

    E-Print Network [OSTI]

    Huai Ding; Mengkai Feng; Huijun Jiang; Zhonghuai Hou

    2015-06-09

    We develop a mode coupling theory(MCT) to study the nonequilibrium glass transition behavior of a mono-disperse mixture of active-passive hard-sphere particles. The MCT equations clearly demonstrate that the glass transition is shifted to higher values of total volume fraction when doping a passive system with active particles. Interestingly, we find that the glass transition point may show a non-monotonic dependence on the effective diffusivity of the active component, indicating a nontrivial type of activity induced reentrance behavior. Analysis based on the nonergodic parameters suggest that the glassy state at small activity is due to the caging effect, while that at high activity could result from activity induced dynamic clustering.

  3. A Quantum Phase Transition in the Cosmic Ray Energy Distribution

    E-Print Network [OSTI]

    A. Widom; J. Swain; Y. Srivastava

    2015-02-07

    We here argue that the "knee" of the cosmic ray energy distribution at $E_c \\sim 1$ PeV represents a second order phase transition of cosmic proportions. The discontinuity of the heat capacity per cosmic ray particle is given by $\\Delta c=0.450196\\ k_B$. However the idea of a deeper critical point singularity cannot be ruled out by present accuracy in neither theory nor experiment. The quantum phase transition consists of cosmic rays dominated by bosons for the low temperature phase E E_c$. The low temperature phase arises from those nuclei described by the usual and conventional collective boson models of nuclear physics. The high temperature phase is dominated by protons. The transition energy $E_c$ may be estimated in terms of the photo-disintegration of nuclei.

  4. A Quantum Phase Transition in the Cosmic Ray Energy Distribution

    E-Print Network [OSTI]

    Widom, A; Srivastava, Y

    2015-01-01

    We here argue that the "knee" of the cosmic ray energy distribution at $E_c \\sim 1$ PeV represents a second order phase transition of cosmic proportions. The discontinuity of the heat capacity per cosmic ray particle is given by $\\Delta c=0.450196\\ k_B$. However the idea of a deeper critical point singularity cannot be ruled out by present accuracy in neither theory nor experiment. The quantum phase transition consists of cosmic rays dominated by bosons for the low temperature phase E E_c$. The low temperature phase arises from those nuclei described by the usual and conventional collective boson models of nuclear physics. The high temperature phase is dominated by protons. The transition energy $E_c$ may be estimated in terms of the photo-disintegration of nuclei.

  5. Order-Disorder structural transition in a confined fluid

    E-Print Network [OSTI]

    Elsa M. de la Calleja-Mora; Leandro B. Krott; Marcia C. Barbosa

    2015-08-07

    In this paper the amorphous/solid to disorder liquid structural phase transitions of an anomalous confined fluid is analyzed using their local fractal dimension. The model is a system of particles interacting through a two length scales potentials confined by two infinite plates. In the bulk, this fluid exhibit water-like anomalies and under confinement forms layers of particles. The particle distributions of them, present different arrangements related to amorphous/solid phases. Here only the contact layer is analyzed through fractal singularity spectrum. At high densities the structural transition its quantify by the order degree to determine the phases affected by the confinement. This mapping shows that the system as the temperature increased, the fractal dimension decreases, which is consistent with the behavior studying in such systems. This result suggests that under thermodynamic perturbations, an anomalous confined liquid, presents different phase transitions achieving be characterized by its fractality.

  6. UNIVERSALITY OF PHASE TRANSITION DYNAMICS: TOPOLOGICAL DEFECTS FROM SYMMETRY BREAKING

    SciTech Connect (OSTI)

    Zurek, Wojciech H.; Del Campo, Adolfo

    2014-02-13

    In the course of a non-equilibrium continuous phase transition, the dynamics ceases to be adiabatic in the vicinity of the critical point as a result of the critical slowing down (the divergence of the relaxation time in the neighborhood of the critical point). This enforces a local choice of the broken symmetry and can lead to the formation of topological defects. The Kibble-Zurek mechanism (KZM) was developed to describe the associated nonequilibrium dynamics and to estimate the density of defects as a function of the quench rate through the transition. During recent years, several new experiments investigating formation of defects in phase transitions induced by a quench both in classical and quantum mechanical systems were carried out. At the same time, some established results were called into question. We review and analyze the Kibble-Zurek mechanism focusing in particular on this surge of activity, and suggest possible directions for further progress.

  7. MHD discontinuities in solar flares: continuous transitions and plasma heating

    E-Print Network [OSTI]

    Ledentsov, L S

    2015-01-01

    The boundary conditions for the ideal MHD equations on a plane dis- continuity surface are investigated. It is shown that, for a given mass flux through a discontinuity, its type depends only on the relation between inclina- tion angles of a magnetic field. Moreover, the conservation laws on a surface of discontinuity allow changing a discontinuity type with gradual (continu- ous) changes in the conditions of plasma flow. Then there are the so-called transition solutions that satisfy simultaneously two types of discontinuities. We obtain all transition solutions on the basis of the complete system of boundary conditions for the MHD equations. We also found the expression describing a jump of internal energy of the plasma flowing through the dis- continuity. Firstly, this allows constructing a generalized scheme of possible continuous transitions between MHD discontinuities. Secondly, it enables the examination of the dependence of plasma heating by plasma density and configuration of the magnetic field near t...

  8. Dipole lasing phase transitions in media with singularities in polarizabilities

    SciTech Connect (OSTI)

    Protsenko, I. E. [Lebedev Physical Institute, Leninsky Prospect 53, Moscow (Russian Federation); Tyndall National Institute, Lee Maltings, Cork (Ireland); O'Reilly, E. P. [Tyndall National Institute, Lee Maltings, Cork (Ireland)

    2006-09-15

    We show that a divergence in the optical polarizability of a heterogeneous medium with nonlinear amplification and a strong dipole-dipole interaction between particles can lead to a phase transition, for which the dipole momentum of the particles or the dipole radiation rate can be taken as order parameters. The 'dipole laser' [Phys. Rev. A 71, 063812 (2005)] can be used both as a simple example of such a second-order phase transition and to provide a recipe for its analysis. We show that similar phase transitions may be possible for a nanoparticle on the surface of an optically active medium and at the 'Clausius-Mossotti' catastrophe in a bulk heterogeneous medium.

  9. Nonequilibrium Glass Transition in Mixtures of Active-Passive Particles

    E-Print Network [OSTI]

    Ding, Huai; Jiang, Huijun; Hou, Zhonghuai

    2015-01-01

    We develop a mode coupling theory(MCT) to study the nonequilibrium glass transition behavior of a mono-disperse mixture of active-passive hard-sphere particles. The MCT equations clearly demonstrate that the glass transition is shifted to higher values of total volume fraction when doping a passive system with active particles. Interestingly, we find that the glass transition point may show a non-monotonic dependence on the effective diffusivity of the active component, indicating a nontrivial type of activity induced reentrance behavior. Analysis based on the nonergodic parameters suggest that the glassy state at small activity is due to the caging effect, while that at high activity could result from activity induced dynamic clustering.

  10. Compton Scattered Transition Radiation from Very High Energy Particles

    E-Print Network [OSTI]

    M. L. Cherry; G. L. Case

    2002-06-04

    X-ray transition radiation can be used to measure the Lorentz factor of relativistic particles. At energies approaching gamma = E/mc^2 = 10^5, transition radiation detectors (TRDs) can be optimized by using thick (sim 5 - 10 mil) foils with large (5-10 mm) spacings. This implies X-ray energies >100 keV and the use of scintillators as the X-ray detectors. Compton scattering of the X-rays out of the particle beam then becomes an important effect. We discuss the design of very high energy detectors, the use of metal radiator foils rather than the standard plastic foils, inorganic scintillators for detecting Compton scattered transition radiation, and the application to the ACCESS cosmic ray experiment.

  11. Holographic metal/superconductor phase transitions with dark matter sector

    E-Print Network [OSTI]

    Peng, Yan

    2015-01-01

    In this paper, we investigate the holographic phase transitions with dark matter sector in the AdS black hole background away from the probe limit. We firstly detect the formation of the scalar hair by examining the behaviors of the superconducting solutions and the effective mass of the scalar field. Then we study the condensation of the scalar operator with respect to the Hawking temperature T. As a further step, we disclose the properties of the phase transitions from the holographic topological entanglement entropy of the system. The holographic topological entanglement entropy is proved to be very useful in characterizing the difference between various phases. At last, we also derive the qualitative properties through the analytical methods. In summary, we find that the model parameters can provide rich physics in the general holographic metal/superconductor phase transitions.

  12. Checklist for transition to new highway fuel(s).

    SciTech Connect (OSTI)

    Risch, C.; Santini, D.J.

    2011-12-15

    Transportation is vital to the U.S. economy and society. As such, U.S. Presidents have repeatedly stated that the nation needs to reduce dependence on petroleum, especially for the highway transportation sector. Throughout history, highway transportation fuel transitions have been completed successfully both in United States and abroad. Other attempts have failed, as described in Appendix A: Historical Highway Fuel Transitions. Planning for a transition is critical because the changes can affect our nation's ability to compete in the world market. A transition will take many years to complete. While it is tempting to make quick decisions about the new fuel(s) of choice, it is preferable and necessary to analyze all the pertinent criteria to ensure that correct decisions are made. Doing so will reduce the number of changes in highway fuel(s). Obviously, changes may become necessary because of occurrences such as significant technology breakthroughs or major world events. With any and all of the possible transitions to new fuel(s), the total replacement of gasoline and diesel fuels is not expected. These conventional fuels are envisioned to coexist with the new fuel(s) for decades, while the revised fuel and vehicle infrastructures are implemented. The transition process must analyze the needs of the primary 'players,' which consist of the customers, the government, the fuel industry, and the automotive industry. To maximize the probability of future successes, the prime considerations of these groups must be addressed. Section 2 presents a succinct outline of the Checklist. Section 3 provides a brief discussion about the groupings on the Checklist.

  13. Nematic--to--Smectic-A Transition in Aerogel

    E-Print Network [OSTI]

    Leo Radzihovsky; John Toner

    1997-10-13

    We study a model for the Nematic--Smectic-A (NA) transition in aerogel, and find that even arbitrarily weak quenched disorder (i.e., low aerogel density) destroys translational (smectic) order. Ignoring elastic anharmonicities, but keeping anharmonic couplings to disorder, leads to the prediction that there is no ``Bragg glass'' phase in this system: it is riddled with dislocation loops induced by the quenched disorder. Orientational (nematic) order is destroyed as well, as is the thermodynamically sharp NA transition, in agreement with recent experimental results.

  14. Laser induced popcornlike conformational transition of nanodiamond as a nanoknife

    SciTech Connect (OSTI)

    Chang, C.-C.; Chen, P.-H.; Chu, H.-L.; Lee, T.-C.; Chou, C.-C.; Chao, J.-I; Su, C.-Y.; Chen, J.S.; Tsai, J.-S.; Tsai, C.-M.; Ho, Y.-P.; Sun, K.W.; Cheng, C.-L.; Chen, F.-R.

    2008-07-21

    Nanodiamond (ND) is surrounded by layers of graphite on its surface. This unique structure feature creates unusual fluorescence spectra, which can be used as an indicator to monitor its surface modification. Meanwhile, the impurity, nitroso (C-N=O) inside the ND can be photolyzed by two-photon absorption, releasing NO to facilitate the formation of a sp{sup 3} diamond structure in the core of ND and transforming it into a sp{sup 2} graphite structure. Such a conformational transition enlarges the size of ND from 8 to 90 nm, resulting in a popcornlike structure. This transition reaction may be useful as nanoknives in biomedical application.

  15. Simultaneous quadrupole and octupole shape phase transitions in Thorium

    E-Print Network [OSTI]

    Z. P. Li; B. Y. Song; J. M. Yao; D. Vretenar; J. Meng

    2013-09-11

    The evolution of quadrupole and octupole shapes in Th isotopes is studied in the framework of nuclear Density Functional Theory. Constrained energy maps and observables calculated with microscopic collective Hamiltonians indicate the occurrence of a simultaneous quantum shape phase transition between spherical and quadrupole-deformed prolate shapes, and between non-octupole and octupole-deformed shapes, as functions of the neutron number. The nucleus $^{224}$Th is closest to the critical point of a double phase transition. A microscopic mechanism of this phenomenon is discussed in terms of the evolution of single-nucleon orbitals with deformation.

  16. The Quantum-Classical Transition in Nonlinear Dynamical Systems

    E-Print Network [OSTI]

    Salman Habib; Kurt Jacobs; Hideo Mabuchi; Robert Ryne; Kosuke Shizume; Bala Sundaram

    2000-10-26

    Viewed as approximations to quantum mechanics, classical evolutions can violate the positive-semidefiniteness of the density matrix. The nature of this violation suggests a classification of dynamical systems based on classical-quantum correspondence; we show that this can be used to identify when environmental interaction (decoherence) will be unsuccessful in inducing the quantum-classical transition. In particular, the late-time Wigner function can become positive without any corresponding approach to classical dynamics. In the light of these results, we emphasize key issues relevant for experiments studying the quantum-classical transition.

  17. Holographic Polarons, the Metal-Insulator Transition and Massive Gravity

    E-Print Network [OSTI]

    Matteo Baggioli; Oriol Pujolas

    2014-11-19

    Massive gravity is holographically dual to `realistic' materials with momentum relaxation. The dual graviton potential encodes the phonon dynamics and it allows for a much broader diversity than considered so far. We construct a simple family of isotropic and homogeneous materials that exhibit an interaction-driven Metal-Insulator transition. The transition is triggered by the formation of polarons -- phonon-electron quasi-bound states that dominate the conductivities, shifting the spectral weight above a mass gap. We characterize the polaron gap, width and dispersion.

  18. A general holographic metal/superconductor phase transition model

    E-Print Network [OSTI]

    Yan Peng; Yunqi Liu

    2015-03-03

    We study the scalar condensation of a general holographic superconductor model in AdS black hole background away from the probe limit. We find the model parameters together with the scalar mass and backreaction can determine the order of phase transitions completely. In addition, we observe two types of discontinuities of the scalar operator in the case of first order phase transitions. We analyze in detail the effects of the scalar mass and backreaction on the formation of discontinuities and arrive at an approximate relation between the threshold model parameters. Furthermore, we obtain superconductor solutions corresponding to higher energy states and examine the stability of these superconductor solutions.

  19. Phase transition in p53 states induced by glucose

    E-Print Network [OSTI]

    Md. Jahoor Alam; R. K. Brojen Singh

    2015-04-02

    We present p53-MDM2-Glucose model to study spatio-temporal properties of the system induced by glucose. The variation in glucose concentration level triggers the system at different states, namely, oscillation death (stabilized), sustain and damped oscillations which correspond to various cellular states. The transition of these states induced by glucose is phase transition like behaviour. We also found that the intrinsic noise in stochastic system helps the system to stabilize more effectively. Further, the amplitude of $p53$ dynamics with the variation of glucose concentration level follows power law behaviour, $A_s(k)\\sim k^\\gamma$, where, $\\gamma$ is a constant.

  20. Fracture Toughness of Metallic Glasses: Ductile-to-Brittle Transition?

    E-Print Network [OSTI]

    Rycroft, Chris H

    2012-01-01

    Quantitative understanding of the fracture toughness of metallic glasses, including the associated ductile-to-brittle transitions, is not yet available. Here we use a simple model of plastic deformation in glasses, coupled to an advanced Eulerian level set formulation for solving complex free boundary problems, to calculate the fracture toughness of metallic glasses as a function of the degree of structural relaxation corresponding to different annealing times near the glass temperature. Our main result indicates the existence of an elasto-plastic crack tip instability for sufficiently relaxed glasses, resulting in a marked drop in the toughness, which we interpret as a ductile-to-brittle transition similar to experimental observations.

  1. Toward the detection of exoplanet transits with polarimetry

    SciTech Connect (OSTI)

    Wiktorowicz, Sloane J.; Laughlin, Gregory P.

    2014-11-01

    In contrast to photometric transits, whose peak signal occurs at mid-transit due to occultation of the brightest region of the disk, polarimetric transits provide a signal upon ingress and egress due to occultation of the polarized stellar limb. Limb polarization, the bright corollary to limb darkening, arises from the 90° scattering angle and low optical depth experienced by photons at the limb. In addition to the ratio R {sub p}/R {sub *}, the amplitude of a polarimetric transit is expected to be controlled by the strength and width of the stellar limb polarization profile, which depend on the scattering-to-total opacity ratio at the stellar limb. We present a short list of the systems providing the highest expected signal-to-noise ratio for detection of this effect, and we draw particular attention to HD 80606b. This planet is spin/orbit misaligned, has a three-hour ingress, and has a bright parent star, which make it an attractive target. We report on test observations of an HD 80606b ingress with the POLISH2 polarimeter at the Lick Observatory Shane 3 m telescope. We conclude that unmodeled telescope systematic effects prevented polarimetric detection of this event. We outline a roadmap for further refinements of exoplanet polarimetry, whose eventual success will require a further factor of ten reduction in systematic noise.

  2. Cuton, cutoff transition of sound in slowly varying flow ducts

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    Cut­on, cut­off transition of sound in slowly varying flow ducts Sjoerd W. Rienstra 19­walled duct with irrotational isentropic mean flow is studied. The usual turning point behaviour was found. 1 Introduction The exact multiple scale solution for sound propagation in a slowly varying lined flow duct

  3. Transitional relief housing for tsunami victims of Tamil Nadu, India

    E-Print Network [OSTI]

    Jin, Shauna

    2006-01-01

    In the wake of the recent tsunami that swept across Asia, there is a dire need to salvage and rebuild the lives and livelihoods that were swept away. The aim of this thesis project is to design and model a transitional ...

  4. The Quantum-Classical Transition and Wave Packet Dispersion

    E-Print Network [OSTI]

    C. L. Herzenberg

    2007-06-11

    Two recent studies have presented new information relevant to the transition from quantum behavior to classical behavior, and related this to parameters characterizing the universe as a whole. The present study based on a separate approach has developed similar results that appear to substantiate aspects of earlier work and also to introduce further new ideas.

  5. Hall effect at a tunable metal-insulator transition 

    E-Print Network [OSTI]

    Teizer, Winfried; Hellman, F.; Dynes, RC.

    2003-01-01

    Using a rotating magnetic field, the Hall effect in three-dimensional amorphous GdxSi1-x has been measured in the critical regime of the metal-insulator transition for a constant total magnetic field. The Hall coefficient R-0 is negative, indicating...

  6. Transitioning Multiagent Technology to UAV Applications Paul Scerri1

    E-Print Network [OSTI]

    Scerri, Paul

    Transitioning Multiagent Technology to UAV Applications Paul Scerri1 , Tracy Von Gonten2 , Gerald for UAV coordination to an in- dustrially developed application. The specific application is the use of lightweight UAVs with small Received Signal Strength Indicator sensors to cooperatively locate targets

  7. Optimization For Grade Transitions In Polyethylene Solution Polymerization

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    , Comonomer, Catalyst, Solvent, Hydrogen 2 1. Che I Kao et al. Non-adiabatic olefin solution polymerizationOptimization For Grade Transitions In Polyethylene Solution Polymerization Jun Shi1, Lorenz T of Advanced Process Decision-making Department of Chemical Engineering Carnegie Mellon University 2The Dow

  8. Optimization For Grade Transitions In Polyethylene Solution Polymerization

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    Optimization For Grade Transitions In Polyethylene Solution Polymerization Jun Shi1, Intan Hamdan2, Sarat Munjal2, Lorenz T. Biegler1 1Center of Advanced Process Decision-making Department of Chemical perfect mixing · Three types of variables · Manipulated variables · Ethylene, comonomer, hydrogen

  9. Asymptotic Approaches to Transition Modelling Stephen J. Cowley Xuesong Wu

    E-Print Network [OSTI]

    Cowley, Stephen J.

    characterising a fluid flow is its Reynolds number. Low-Reynolds-number flows are invariably laminar, the NS equations admit solutions which describe laminar flow, but such solutions may be unstable to small by which a laminar flow becomes turbulent is termed `transition'; the reverse process is usually referred

  10. GENERATION OF TRANSITION CLASS MODELS FROM FORMAL QUEUEING NETWORK DESCRIPTIONS

    E-Print Network [OSTI]

    Strelen, Christoph

    stochastic Petri nets (GSPN), UltraSAN [8] for stochastic activity networks, a class of stochastic Petri netsGENERATION OF TRANSITION CLASS MODELS FROM FORMAL QUEUEING NETWORK DESCRIPTIONS Johann Christoph-mail: strelen@cs.uni-bonn.de KEYWORDS Queueing Networks, Tools, Multi-Paradigm Models, Gener- ation, Markov

  11. Process Model Discovery: A Method Based on Transition System Decomposition

    E-Print Network [OSTI]

    van der Aalst, Wil

    Process Model Discovery: A Method Based on Transition System Decomposition Anna A. Kalenkova1 discovery algo- rithms deal with large data sets to learn automatically process models. As more event data by the unified process model. The proposed discovery algorithm is illustrated using a running example. 1

  12. Fixpoint alternation: arithmetic, transition systems, and the binary tree

    E-Print Network [OSTI]

    Bradfield, Julian

    Fixpoint alternation: arithmetic, transition systems, and the binary tree J. C. Brad#12;eld LFCS, 1 for ex- pressing temporal properties of systems. It was #12;rst studied by Dexter Kozen in [Koz83 of the logic that gives it both its simplicity and its power is that it is possible to have mutually dependent

  13. Discovery of a transiting planet near the snow-line

    SciTech Connect (OSTI)

    Kipping, D. M.; Torres, G.; Buchhave, L. A.; Kenyon, S. J. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Henze, C.; Bryson, S. T. [NASA Ames Research Center, Moffett Field, CA 94035 (United States); Isaacson, H.; Kolbl, R.; Marcy, G. W. [University of California, Berkeley, CA 94720 (United States); Stassun, K. [Department of Physics and Astronomy, Vanderbilt University, 1807 Station B, Nashville, TN 37235 (United States); Bastien, F., E-mail: dkipping@cfa.harvard.edu [Physics Department, Fisk University, 1000 17th Ave. N, Nashville, TN 37208 (United States)

    2014-11-01

    In most theories of planet formation, the snow-line represents a boundary between the emergence of the interior rocky planets and the exterior ice giants. The wide separation of the snow-line makes the discovery of transiting worlds challenging, yet transits would allow for detailed subsequent characterization. We present the discovery of Kepler-421b, a Uranus-sized exoplanet transiting a G9/K0 dwarf once every 704.2 days in a near-circular orbit. Using public Kepler photometry, we demonstrate that the two observed transits can be uniquely attributed to the 704.2 day period. Detailed light curve analysis with BLENDER validates the planetary nature of Kepler-421b to >4? confidence. Kepler-421b receives the same insolation as a body at ?2 AU in the solar system, as well as a Uranian albedo, which would have an effective temperature of ?180 K. Using a time-dependent model for the protoplanetary disk, we estimate that Kepler-421b's present semi-major axis was beyond the snow-line after ?3 Myr, indicating that Kepler-421b may have formed at its observed location.

  14. Magic wavelength for the hydrogen 1S-2S transition

    E-Print Network [OSTI]

    Kawasaki, Akio

    The magic wavelength for an optical lattice for hydrogen atoms that cancels the lowest order ac Stark shift of the 1S-2S transition is calculated to be 513 nm. The magnitudes of the ac Stark shift ?E = ?119 Hz/(kW/cm[superscript ...

  15. Development of a One-Equation Transition/Turbulence Model

    SciTech Connect (OSTI)

    EDWARDS,JACK R.; ROY,CHRISTOPHER J.; BLOTTNER,FREDERICK G.; HASSAN,HASSAN A.

    2000-09-26

    This paper reports on the development of a unified one-equation model for the prediction of transitional and turbulent flows. An eddy viscosity - transport equation for non-turbulent fluctuation growth based on that proposed by Warren and Hassan (Journal of Aircraft, Vol. 35, No. 5) is combined with the Spalart-Allmaras one-equation model for turbulent fluctuation growth. Blending of the two equations is accomplished through a multidimensional intermittence function based on the work of Dhawan and Narasimha (Journal of Fluid Mechanics, Vol. 3, No. 4). The model predicts both the onset and extent of transition. Low-speed test cases include transitional flow over a flat plate, a single element airfoil, and a multi-element airfoil in landing configuration. High-speed test cases include transitional Mach 3.5 flow over a 5{degree} cone and Mach 6 flow over a flared-cone configuration. Results are compared with experimental data, and the spatial accuracy of selected predictions is analyzed.

  16. Superfluid transition in superfluid 3 He in radially

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of NMR. The aerogel was coated with 4He to ensure the absence of solid 3He that would perturb the NMRSuperfluid transition in superfluid 3 He in radially compressed aerogel. P Hunger, Yu M Bunkov, E discovered 2 new types of BEC in superfluid 3 He in deformed aerogel. The orbital part of the wave function

  17. Mantle transition zone topography and structure beneath the Yellowstone hotspot

    E-Print Network [OSTI]

    Dueker, Ken

    Mantle transition zone topography and structure beneath the Yellowstone hotspot David Fee and Ken ± 1.6 km, with 36­40 km of peak to peak topography. This topography is spatially uncorrelated, providing no evidence for a lower mantle plume currently beneath the hotspot. The topography suggests

  18. Classifying the phase transition threshold for unordered regressive Ramsey numbers

    E-Print Network [OSTI]

    Weiermann, Andreas

    Classifying the phase transition threshold for unordered regressive Ramsey numbers Florian the notion of unordered regressive Ramsey numbers or unordered Kanamori-McAloon numbers. We show that these are of Ackermannian growth rate. For a given number- theoretic function f we consider unordered f-regressive Ramsey

  19. Chaotic Dynamics in Multidimensional Transition States Ali Allahem1, a)

    E-Print Network [OSTI]

    , not in configuration space. It is bounded by a high-dimensional invariant hyper-sphere that plays the role of the periodic orbit in the two-dimensional setting. At sufficiently low energies, this hyper geometric objects in phase space: An invariant hyper-sphere that represents the transition state itself

  20. Coulomb gauge approach for charmonium meson and hybrid radiative transitions

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

    Gou, Peng; Yepez-Martínez, Tochtli; Szczepaniak, Adam P.

    2015-01-22

    We consider the lowest order interaction of the Foldy-Wouthuysen QED and QCD Hamiltonian in the Coulomb gauge approach, to describe radiative transitions between conventional and hybrids charmonium mesons. The results are compared to potential quark models and lattices calculations.

  1. Pulse Programming for Qubit Transitions Ryan Bowler & Viki Mirgon

    E-Print Network [OSTI]

    Blinov, Boris

    Pulse Programming for Qubit Transitions Ryan Bowler & Viki Mirgon University of Washington Department of Physics Energy levels of Barium 137 Oscilloscope output of the Pulse Programmer Envelope for the microwave control pulses Pulses! Quantum computers have been theorized for many years and are now

  2. Magic Wavelength for Hydrogen 1S-2S Transition

    E-Print Network [OSTI]

    Kawasaki, Akio

    2015-01-01

    The magic wavelength for an optical lattice for hydrogen atoms that cancels the first order AC Stark shift of 1S-2S transition is calculated to be 513 nm. The amount of AC Stark shift $ \\Delta E = -1.19$ kHz/(10kW/cm$^2$) and the slope $d\\Delta E/d \

  3. Making arbitrary graphs transitively orientable: Minimal comparability completions

    E-Print Network [OSTI]

    Papadopoulos, Charis

    Making arbitrary graphs transitively orientable: Minimal comparability completions Pinar Heggernes to an arbitrary graph is called a comparability completion of the input graph. Unfortunately, computing a comparability completion with the minimum number of added edges (called a minimum completion) is an NP

  4. Study of radiative bottomonium transitions using converted photons

    E-Print Network [OSTI]

    Cowan, Ray Franklin

    We use (111±1) million ?(3S) and (89±1) million ?(2S) events recorded by the BABAR detector at the PEP-II B-factory at SLAC to perform a study of radiative transitions between bottomonium states using photons that have ...

  5. Percolation approach to phase transitions in high energy nuclear collisions

    E-Print Network [OSTI]

    A. Rodrigues; R. Ugoccioni; J. Dias de Deus

    1998-12-15

    We study continuum percolation in nuclear collisions for the realistic case in which the nuclear matter distribution is not uniform over the collision volume, and show that the percolation threshold is increased compared to the standard, uniform situation. In terms of quark-gluon plasma formation this means that the phase transition threshold is pushed to higher energies.

  6. Is the spin transition in Fe2+ bearing perovskite

    E-Print Network [OSTI]

    Cattin, Rodolphe

    Click Here for Full Article Is the spin transition in Fe2+ bearing perovskite visible in seismology; accepted 14 June 2010; published 15 July 2010. [1] We determine the elasticity of FeSiO3 perovskite differences in seismic anisotropy between the highspin and lowspin phases of Febearing perovskite coupled

  7. Precision shooting: Sampling long transition pathways Michael Grnwald,1

    E-Print Network [OSTI]

    Gruenwald, Michael

    methods of transition path sampling to harvest simulated trajectories that exemplify such processes as autoionization in liquid water,5 structural transformations in nanocrystalline solids,6 and folding of small tools have been developed to extract from such a collection of trajecto- ries useful molecular

  8. Coherent transition radiation from a helically microbunched electron beam

    SciTech Connect (OSTI)

    Hemsing, E.; Rosenzweig, J. B. [Department of Physics and Astronomy, Particle Beam Physics Laboratory, University of California Los Angeles, Los Angeles, California 90095 (United States)

    2009-05-01

    The coherent transition radiation emitted from an electron beam with higher-order spatial microbunching is analyzed. The characteristic angular and phase dependence can be used to identify the dominant bunching structure of such beams, which can be generated during the harmonic interaction in optical klystron modulators and free-electron lasers, and used as tunable sources of coherent light with orbital angular momentum.

  9. Biofuels' Time of Transition Achieving high performance in a world

    E-Print Network [OSTI]

    Kammen, Daniel M.

    Biofuels' Time of Transition Achieving high performance in a world of increasing fuel diversity #12;2 Table of contents #12;3 Introduction Up close: Highlights of Accenture's first biofuels study An evolving biofuels industry 1 Consumer influence Guest commentary on land-use change In focus: The food

  10. Synchronization Transitions in a Disordered Josephson Series Kurt Wiesenfeld

    E-Print Network [OSTI]

    Colet, Pere

    Synchronization Transitions in a Disordered Josephson Series Array Kurt Wiesenfeld School corresponds to complete phase­locking. In the limit of weak coupling and disorder, the system can be mapped with negligible capacitance, the governing circuit equations are ¯ h 2er j â?? OE j + I j sin OE j + â?? Q = I B ; j

  11. Volume-based Transit Pricing: Is 95 The Right Percentile?

    E-Print Network [OSTI]

    California at San Diego, University of

    for a customer, which captures its contribution to the provider's peak load. 1 Introduction The industry standard an industry de facto standard for transit providers for well over a decade. While the simplicity of the scheme interconnection practices and industry structure over the last two decades motivates an obvious question

  12. Energy Transitions: A Systems Approach Including Marcellus Shale Gas Development

    E-Print Network [OSTI]

    Angenent, Lars T.

    hydrocarbons such as natural gas. Whereas an over- all goal for the century is to achieve a sustainable system to increased use of unconventional gas resources as a result of declining supplies of conventional resources case study of energy transitions we focused on the case of un- conventional natural gas recovery from

  13. Transition Metal Nutrition: A Balance Between Deficiency and Toxicity

    E-Print Network [OSTI]

    Hamel, Patrice

    333 Transition Metal Nutrition: A Balance Between Deficiency and Toxicity CHAPTER 10 CHAPTER CONTENTS I. Introduction 334 II. Components of the metal homeostasis network 335 A. Metal transporters 335 B. Metal chelation 349 C. Differences with other photosynthetic organisms 352 III. Metal tolerance

  14. Modeling the brittleductile transition in ferritic steels: dislocation simulations

    E-Print Network [OSTI]

    Ghoniem, Nasr M.

    fracture toughness values cannot be estimated; which should correspond to the ductile regime. The obtained the crack plane attains a critical value rF over a distance fracture is assumed to take place. The brittle­ductile transition curve is obtained by deter- mining the fracture toughness at various temperatures. Factors

  15. Dynamical thickening transition in plate coating with concentrated surfactant solutions

    E-Print Network [OSTI]

    Jérôme Delacotte; Lorraine Montel; Frédéric Restagno; Benoît Scheid; Benjamin Dollet; Howard A. Stone; Dominique Langevin; Emmanuelle Rio

    2011-06-10

    We present a large range of experimental data concerning the influence of surfactants on the well-known Landau-Levich-Derjaguin experiment where a liquid film is generated by pulling a solid plate out of a bath. The thickness h of the film was measured as a function of the pulling velocity V for different kind of surfactant and at various concentrations. Measuring the thickening factor $\\alpha=h/h_{LLD}$, where hLLD is obtained for a pure liquid, in a wide range of capillary ($Ca=\\eta V/\\gamma$), two regimes of constant thickening can be identified: at small capillary number, $\\alpha$ is large due to a confinement and surface elasticity (or Marangoni) effects and at large Ca, $\\alpha$ is slightly higher than unity, due to surface viscous effects. At intermediate Ca, $\\alpha$ decreases as Ca increases along a "dynamic transition". In the case of non-ionic surfactants, the dynamic transition occurs at a fixed Ca, independently of the surfactant concentration, while for ionic surfactants, the dynamic transition depends on the concentration due to the existence of an electrostatic barrier. The control of physico-chemical parameters allowed us to elucidate the nature of the dynamic transition and to relate it to surface rheology.

  16. Turbulence transition and internal wave generation in density stratified jets

    E-Print Network [OSTI]

    Sutherland, Bruce

    Turbulence transition and internal wave generation in density stratified jets B. FL Sutherland (Received 3 June 1993; accepted 18 November 1993) The nonlinear evolution of an unstable symmetric jet torques. In this case, the mean flow of the fully evolved jet is stable to subharmonic disturbances

  17. Changing forms and sudden smooth transitions of tsunami waves

    E-Print Network [OSTI]

    Changing forms and sudden smooth transitions of tsunami waves R. H. J. Grimshaw1 , J. C. R. Hunt1 Engineering, University of Hong Kong, Hong Kong August 14, 2014 Abstract In some tsunami waves travelling over can be as large as two, which may explain anomalous elevations of tsunamis at particular positions

  18. DART's (Dallas Area Rapid Transit) LNG Bus Fleet Start-Up Experience (Alternative Fuel Transit Buses Brochure)

    SciTech Connect (OSTI)

    Battelle

    2000-06-30

    This report, based on interviews and site visits conducted in October 1999, describes the start-up activities of the DART liquefied natural gas program, identifying problem areas, highlighting successes, and capturing the lessons learned in DART's ongoing efforts to remain at the forefront of the transit industry.

  19. Achieving high-precision ground-based photometry for transiting exoplanets

    E-Print Network [OSTI]

    Guyon, Olivier

    Achieving high-precision ground-based photometry for transiting exoplanets Olivier Guyona, USA ABSTRACT Detection of transiting exoplanets requires high precision photometry, at the percent an ideally stable - but costly - environment for high precision photometry. Achieving high precision

  20. Low Frequency Acoustic Resonance Studies of the Liquid-Vapor Transition in Silica Aerogel

    E-Print Network [OSTI]

    Tobias Herman; John Beamish

    2005-06-30

    Fluid phase transitions in porous media are a powerful probe of the effect of confinement and disorder on phase transitions. Aerogel may provide a model system in which to study the effect of dilute impurities on a variety of phase transitions. In this paper we present a series of low frequency acoustic experiments on the effect of aerogel on the liquid-vapor phase transition. Acoustic resonators were used to study the liquid-vapor transition in two fluids (helium and neon) and in two different porosity aerogels (95% and 98%). While effective coexistence curves could be mapped out, the transition was sometimes difficult to pinpoint, leading to doubt as to whether this transition can be treated as an equilibrium macroscopic phase transition at all.

  1. Adaptive Planning for Markov Decision Processes with Uncertain Transition Models via Incremental Feature Dependency Discovery

    E-Print Network [OSTI]

    Geramifard, Alborz

    Solving large scale sequential decision making problems without prior knowledge of the state transition model is a key problem in the planning literature. One approach to tackle this problem is to learn the state transition ...

  2. ABOUT TRANSFINITE COMPOSITIONS OF WEAK EQUIVALENCES OF HIGHER DIMENSIONAL TRANSITION SYSTEMS

    E-Print Network [OSTI]

    Gaucher, Philippe - Laboratoire Preuves, Programmes et Systèmes, Université Paris 7

    transition systems WTS and CTS. All generating cofibrations of WTS, CTS, CTS+ are maps between weak transition systems containing a finite number of states and actions by [Gau11, Proposition 5.4] for WTS

  3. ARB's Study of Emissions from Diesel and CNG Heavy-duty Transit...

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

    ARB's Study of Emissions from Diesel and CNG Heavy-duty Transit Buses ARB's Study of Emissions from Diesel and CNG Heavy-duty Transit Buses 2002 DEER Conference Presentation:...

  4. Elastic-plastic analysis of the transition divertor joint for high performance divertor target plate

    E-Print Network [OSTI]

    Navaei, Dara

    2011-01-01

    locations of principal plastic strains in 3D warm and coldthe ARIES Team “Elastic-Plastic analysis of the transitionSAN DIEGO Elastic-Plastic Analysis of the Transition

  5. Cross-linking proteins with bimetallic tetracarboxylate compounds of transition metals

    DOE Patents [OSTI]

    Kostic, N.M.; Chen, J.

    1991-03-05

    Stable cross-linked complexes of transition-metal tetracarboxylates and proteins are formed. The preferred transition-metal is rhodium. The protein may be collagen or an enzyme such as a proteolytic enzyme. No Drawings

  6. Chirped-pulse millimeter-wave spectroscopy, dynamics, and manipulation of Rydberg-Rydberg Transitions

    E-Print Network [OSTI]

    Colombo, Anthony P. (Anthony Paul)

    2013-01-01

    The chirped-pulse millimeter-wave (CPmmW) technique is applied to transitions between Rydberg states, and calcium atoms are used as the initial test system. The unique feature of Rydberg{Rydberg transitions is that they ...

  7. Fact #555: January 26, 2009 Transit Buses are Relying Less on Diesel Fuel

    Broader source: Energy.gov [DOE]

    In 1995, over 95% of the fuel used in transit buses was diesel. In 2006, diesel fuel constituted just under 75% of the fuel used by transit buses while other fuel types such as compressed natural...

  8. Dispatching Demand ResponseTransit Service: Maximizing Productivity and Service Quality Guidebook

    E-Print Network [OSTI]

    Dispatching Demand ResponseTransit Service: Maximizing Productivity and Service Quality Guidebook and Subtitle Dispatching Demand Response Transit Service Maximizing Productivity and Service Quality Guidebook while maintaining service quality. Researchers collected data from 42 demand response rural and small

  9. Transit planning in Curitiba and Bogotá : roles in interaction, risk, and change

    E-Print Network [OSTI]

    Ardila Gómez, Arturo

    2004-01-01

    What is the role of planners in the planning process for new transit modes? By documenting transit-planning processes in Curitiba and Bogota from 1955-95 and 1986-2001, respectively, this work demonstrates that in both ...

  10. Fuel Cell Transit Buses: ThunderPower Bus Evaluation at SunLine...

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

    SunLine Transit Agency Report details the six-month evaluation of the ThunderPower hydrogen fuel cell bus demonstrated at SunLine Transit Agency. sunlinereport.pdf More Documents...

  11. The Piloted Transition to Flaming in Smoldering Fire Retarded and Non-Fire Retarded Polyurethane Foam 

    E-Print Network [OSTI]

    Putzeys, Olivier; Fernandez-Pello, Carlos; Rein, Guillermo; Urban, David

    The piloted transition from smoldering to flaming, though a significant fire safety concern, has not been previously extensively studied. Experimental results are presented on the piloted transition from smoldering to ...

  12. An Analysis of the Impacts of British Transport Reforms on Transit Integration in the Metropolitan Areas

    E-Print Network [OSTI]

    Rivasplata, Charles Richard

    2006-01-01

    contrast to many other cities with the smart card system ofthe three case cities. Fare integration: transit smart cardsonly city in the country to have introduced a transit smart

  13. A Study of Porous Transitions of Layer-By-Layer Thin Films and Patterning Multilayers 

    E-Print Network [OSTI]

    Cho, Chungyeon

    2013-05-24

    of this thesis focuses on patterning polyelectrolyte multilayers that are able to undergo transitions from continuous films to porous materials by using hydrogel stamps. The stamping process is able to locally etch and pattern the porous transition in the Lb...

  14. E?H mode transition density and power in two types of inductively coupled plasma configuration

    SciTech Connect (OSTI)

    Wang, Jian; Du, Yin-chang; Zhang, Xiao; Zheng, Zhe; Liu, Yu; Xu, Liang; Wang, Pi; Cao, Jin-xiang, E-mail: jxcao@ustc.edu.cn [Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)

    2014-07-15

    E???H transition power and density were investigated at various argon pressures in inductively coupled plasma (ICP) in a cylindrical interlaid chamber. The transition power versus the pressure shows a minimum transition power at 4?Pa (?/?=1) for argon. Then the transition density hardly changes at low pressures (?/??1), but it increases clearly when argon pressure exceeds an appropriate value. In addition, both the transition power and transition density are lower in the re-entrant configuration of ICP compared with that in the cylindrical configuration of ICP. The result may be caused from the decrease of stochastic heating in the re-entrant configuration of ICP. This work is useful to understand E???H mode transition and control the transition points in real plasma processes.

  15. Using land value capture to fund rail transit extensions in Mexico City and Santiago de Chile

    E-Print Network [OSTI]

    Covarrubias, Alvaro, 1973-

    2004-01-01

    The effects of rail rapid transit on land uses and land values are discussed. Rail transit can enhance accessibility, and can raise the demand for locating in areas around stations, increasing land value, and in some cases ...

  16. Fuel Cell Buses in U.S. Transit Fleets: Summary of Experiences...

    Office of Environmental Management (EM)

    Buses in U.S. Transit Fleets: Summary of Experiences and Current Status Fuel Cell Buses in U.S. Transit Fleets: Summary of Experiences and Current Status This report reviews past...

  17. Real-time operations planning and control of high-frequency transit

    E-Print Network [OSTI]

    Sánchez-Martínez, Gabriel Eduardo

    2015-01-01

    High-frequency transit systems are essential for the socioeconomic and environmental well-being of large and dense cities. The planning and control of their operations are important determinants of service quality. Transit ...

  18. Fuel Cell Buses in U.S. Transit Fleets: Current Status 2009

    SciTech Connect (OSTI)

    Eudy, L.; Chandler, K.; Gikakis, C.

    2009-10-01

    This report documents progress in meeting the technological challenges of fuel cell propulsion for transportation based on current fuel cell transit bus demonstrations and plans for more fuel cell transit buses and hydrogen infrastructure.

  19. Metal-insulator transition of the reduced surface of yttria-stabilized...

    Office of Scientific and Technical Information (OSTI)

    Metal-insulator transition of the reduced surface of yttria-stabilized zirconia near Pt electrodes. Citation Details In-Document Search Title: Metal-insulator transition of the...

  20. A transitional home in the city : rebuilding the layers of daily life

    E-Print Network [OSTI]

    Steinberg, Shira Judith

    1990-01-01

    This thesis explores how the architecture of a place can be informed by an understanding of psychological needs. The project is the design of a transitional home in the South End of Boston. A transitional home is a place ...