Sample records for rapid transit system

  1. Tunnel Boring Machine (TBM) performance in Singapore's Mass Rapid Transit (MRT) system

    E-Print Network [OSTI]

    Chong, Wanling

    2013-01-01T23:59:59.000Z

    Singapore's Mass Rapid Transit (MRT) network is one of the largest public works projects undertaken by the Singapore government. This thesis summarizes and evaluates the performance of Tunnel Boring Machine (TBM) construction ...

  2. Building bus rapid transit into the existing public transit system : competition and integration of BRT and the Urban Rail Transit in cities in China

    E-Print Network [OSTI]

    Zhan, Yun, M.C.P. Massachusetts Institute of Technology

    2011-01-01T23:59:59.000Z

    BRT is a new type of bus transit with high speed and capacity. With its advantages and benefits, BRT is getting popular in the world, including China. Since BRT and urban rail transit (URT) are both rapid public transports, ...

  3. Bus Centric Rapid Transit

    E-Print Network [OSTI]

    Banasiak, J.

    2011-01-01T23:59:59.000Z

    Transfer Center TOD ? SmartCode/CNU Goals ? Public/private development partnership ? Emphasis on the pedestrian ? Bicycle and transit oriented development ? Dover Kohl TOD report, Dec. 2010 ? WTC will be anchor and terminus for BRT 11 18 Westside... Transfer Center 18 18 Five Points TOD #2 15 Five Points TOD 16 ? SmartCode/CNU Goals ? Public/private development partnership ? Emphasis on the pedestrian ? Bicycle and transit oriented development ? Dover Kohl TOD report, Dec. 2010 ? Five...

  4. WVU Personal Rapid Transit Benefit Cost Analysis

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    WVU Personal Rapid Transit Benefit Cost Analysis Morgantown, West Virginia Prepared For: West.......................................................................................... 15 Travel Time Value - Understanding Travel Time Costs................................................. 15 Travel Time Value - Understanding Travel Time Costs

  5. Viability of Modern Automated Rapid Transit Applications

    E-Print Network [OSTI]

    Minnesota, University of

    characterized by: · Lack of distribution system from transit stations & stops and from parking facilities: 1.8 · Reliability: 99.7% vehicle availability; 99.2% system availability (U.S. transit: 97.5%) #12 · Not necessarily "personal," but close #12;What ART Looks Like #12;Characteristics of ART Systems · Separate

  6. area rapid transit: Topics by E-print Network

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

    AWARD FOR RAPID TRANSITION (BSTART) (R03) Funding Opportunity Number: PAR-12-251. CFDA Number(s): 93.279. Engineering Websites Summary: Services, National Institutes of...

  7. First results from the MIT optical rapid imaging system (MORIS) on the IRTF: A stellar occultation by Pluto and a transit by exoplanet XO-2b

    E-Print Network [OSTI]

    Gulbis, Amanda A. S.

    We present a high-speed, visible-wavelength imaging instrument: MORIS (the MIT Optical Rapid Imaging System). MORIS is mounted on the 3 m Infrared Telescope Facility (IRTF) on Mauna Kea, Hawaii. Its primary component is ...

  8. System strategies in the management of transit systems towards the end of their life cycle

    E-Print Network [OSTI]

    Kairon, Ajmer Singh

    2007-01-01T23:59:59.000Z

    This thesis explores and evaluates essential strategies needed for the transit authority/operator to deal with end of life cycle challenges of Rapid Transit Systems (RTS) systems. RTS systems are elaborate systems consisting ...

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

    SciTech Connect (OSTI)

    Chandler, K. [Battelle (US); Norton, P. [National Renewable Energy Lab., Golden, CO (US); Clark, N.

    2000-11-07T23:59:59.000Z

    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. Rapid starting methanol reactor system

    DOE Patents [OSTI]

    Chludzinski, Paul J. (38 Berkshire St., Swampscott, MA 01907); Dantowitz, Philip (39 Nancy Ave., Peabody, MA 01960); McElroy, James F. (12 Old Cart Rd., Hamilton, MA 01936)

    1984-01-01T23:59:59.000Z

    The invention relates to a methanol-to-hydrogen cracking reactor for use with a fuel cell vehicular power plant. The system is particularly designed for rapid start-up of the catalytic methanol cracking reactor after an extended shut-down period, i.e., after the vehicular fuel cell power plant has been inoperative overnight. Rapid system start-up is accomplished by a combination of direct and indirect heating of the cracking catalyst. Initially, liquid methanol is burned with a stoichiometric or slightly lean air mixture in the combustion chamber of the reactor assembly. The hot combustion gas travels down a flue gas chamber in heat exchange relationship with the catalytic cracking chamber transferring heat across the catalyst chamber wall to heat the catalyst indirectly. The combustion gas is then diverted back through the catalyst bed to heat the catalyst pellets directly. When the cracking reactor temperature reaches operating temperature, methanol combustion is stopped and a hot gas valve is switched to route the flue gas overboard, with methanol being fed directly to the catalytic cracking reactor. Thereafter, the burner operates on excess hydrogen from the fuel cells.

  11. The potential for bus rapid transit to promote transit oriented development : an analysis of BRTOD in Ottawa, Brisbane, and Pittsburgh

    E-Print Network [OSTI]

    Judy, Meredith H. (Meredith Hampton)

    2007-01-01T23:59:59.000Z

    This thesis explores the conditions under which bus rapid transit (BRT) can promote transit oriented development (TOD). At a time when cities throughout the U.S. are searching for methods to reduce road congestion and limit ...

  12. Rapidity distribution dependence of the transition energy in heavy-ion collisions

    E-Print Network [OSTI]

    Sanjeev Kumar; Suneel Kumar

    2010-09-28T23:59:59.000Z

    For the present analysis, simulations are carried out for thousand of events for the reaction of 79Au197 + 79Au197 at semi-central geometry using a hard equation of state. The whole of the analysis is performed for light charged particles (LCP's). The transition from in-plane to out-of-plane is observed only when the mid-rapidity region is included in the rapidity bin otherwise no transition is observed. The transition energy is found to be strongly dependent on the size of the rapidity bin. The transition energy is parameterized with a straight line interpolation.

  13. Leveraging infrastructure : sustainable bus rapid transit route planning in Beirut, Lebanon

    E-Print Network [OSTI]

    Nabti, Jumana M., 1976-

    2004-01-01T23:59:59.000Z

    This thesis applies the concepts of urban design, public transportation planning, economic development, and sustainability, to the routing and site plan of a two-kilometer bus rapid transit (BRT) line segment into downtown ...

  14. Rapid Deceleration-Driven Wetting Transition during Pendant Drop Deposition on Superhydrophobic Surfaces

    E-Print Network [OSTI]

    Kwon, HyukMin

    A hitherto unknown mechanism for wetting transition is reported. When a pendant drop settles upon deposition, there is a virtual “collision” where its center of gravity undergoes rapid deceleration. This induces a high ...

  15. Energy-beam-driven rapid fabrication system

    DOE Patents [OSTI]

    Keicher, David M. (Albuquerque, NM); Atwood, Clinton L. (Albuquerque, NM); Greene, Donald L. (Corrales, NM); Griffith, Michelle L. (Albuquerque, NM); Harwell, Lane D. (Albuquerque, NM); Jeantette, Francisco P. (Albuquerque, NM); Romero, Joseph A. (Albuquerque, NM); Schanwald, Lee P. (Albuquerque, NM); Schmale, David T. (Albuquerque, NM)

    2002-01-01T23:59:59.000Z

    An energy beam driven rapid fabrication system, in which an energy beam strikes a growth surface to form a molten puddle thereon. Feed powder is then injected into the molten puddle from a converging flow of feed powder. A portion of the feed powder becomes incorporated into the molten puddle, forcing some of the puddle contents to freeze on the growth surface, thereby adding an additional layer of material. By scanning the energy beam and the converging flow of feed powder across the growth surface, complex three-dimensional shapes can be formed, ready or nearly ready for use. Nearly any class of material can be fabricated using this system.

  16. Regional Transit System: Return on Investment Assessment

    E-Print Network [OSTI]

    Minnesota, University of

    Regional Transit System: Return on Investment Assessment May 2014 #12;1 Today's agenda Itasca transit options Enables strategic, efficient investment in long-term infrastructure, e.g., energy grid are seeking cities with good transit Transit can be a cost-efficient way to add capacity in corridors

  17. The design evaluation of inductive power-transformer for personal rapid transit by measuring impedance

    SciTech Connect (OSTI)

    Han, Kyung-Hee [Department of Electrical Engineering, Dongguk University, Seoul 100-715 (Korea, Republic of); Department of Electricity and Signaling, Korea Railroad Research Institute, Uiwang, Kyonggi 437-050 (Korea, Republic of); Lee, Byung-Song [Department of Electricity and Signaling, Korea Railroad Research Institute, Uiwang, Kyonggi 437-050 (Korea, Republic of); Baek, Soo-Hyun [Department of Electrical Engineering, Dongguk University, Seoul 100-715 (Korea, Republic of)

    2008-04-01T23:59:59.000Z

    The contact-less inductive power transformer (IPT) uses the principle of electromagnetic induction. The concept of the IPT for vehicles such as the personal rapid transit (PRT) system is proposed and some suggestions for power collector design of IPT to improve power transfer performance are presented in this paper. The aim of this paper is to recommend the concept of IPT for vehicles such as the PRT system and also to present some propositions for the power collector design of the IPT, which is to improve the power transfer performance. Generally, there are diverse methods to evaluate transfer performance of the traditional transformers. Although the principle of IPT is similar to that of the general transformer, it is impossible to apply the methods directly because of large air gap. The system must be compensated by resonant circuit due to the large air gap. Consequently, it is difficult to apply numerical formulas to the magnetic design of IPT systems. This paper investigates the magnetic design of a PRT system using three-dimensional magnetic modeling and measurements of the pick-up coupling coefficient and its impedances. In addition, how the use of Litz wire and leakage inductance is related will be observed through experiment and simulation.

  18. Conformational Transitions in Molecular Systems

    E-Print Network [OSTI]

    Michael Bachmann; Wolfhard Janke

    2009-02-17T23:59:59.000Z

    Proteins are the "work horses" in biological systems. In almost all functions specific proteins are involved. They control molecular transport processes, stabilize the cell structure, enzymatically catalyze chemical reactions; others act as molecular motors in the complex machinery of molecular synthetization processes. Due to their significance, misfolds and malfunctions of proteins typically entail disastrous diseases, such as Alzheimer's disease and bovine spongiform encephalopathy (BSE). Therefore, the understanding of the trinity of amino acid composition, geometric structure, and biological function is one of the most essential challenges for the natural sciences. Here, we glance at conformational transitions accompanying the structure formation in protein folding processes.

  19. In Press: Journal of Rail and Rapid Transit Machine vision analysis of the energy efficiency

    E-Print Network [OSTI]

    Barkan, Christopher P.L.

    In Press: Journal of Rail and Rapid Transit 1 Machine vision analysis of the energy efficiency of the Train Energy Model. Slot efficiency represents the difference between the actual and ideal loading used for loading assignment. Keywords: environment, energy efficiency, aerodynamics, fuel use

  20. RAPID DYNAMICAL CHAOS IN AN EXOPLANETARY SYSTEM

    SciTech Connect (OSTI)

    Deck, Katherine M.; Winn, Joshua N. [Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (United States); Holman, Matthew J.; Carter, Joshua A.; Ragozzine, Darin [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Agol, Eric [Department of Astronomy, Box 351580, University of Washington, Seattle, WA 98195 (United States); Lissauer, Jack J. [NASA Ames Research Center, Moffet Field, CA 94035 (United States)

    2012-08-10T23:59:59.000Z

    We report on the long-term dynamical evolution of the two-planet Kepler-36 system, which consists of a super-Earth and a sub-Neptune in a tightly packed orbital configuration. The orbits of the planets, which we studied through numerical integrations of initial conditions that are consistent with observations of the system, are chaotic with a Lyapunov time of only {approx}10 years. The chaos is a consequence of a particular set of orbital resonances, with the inner planet orbiting 34 times for every 29 orbits of the outer planet. The rapidity of the chaos is due to the interaction of the 29:34 resonance with the nearby first-order 6:7 resonance, in contrast to the usual case in which secular terms in the Hamiltonian play a dominant role. Only one contiguous region of phase space, accounting for {approx}4.5% of the sample of initial conditions studied, corresponds to planetary orbits that do not show large-scale orbital instabilities on the timescale of our integrations ({approx}200 million years). Restricting the orbits to this long-lived region allows a refinement of estimates of the masses and radii of the planets. We find that the long-lived region consists of the initial conditions that satisfy the Hill stability criterion by the largest margin. Any successful theory for the formation of this system will need to account for why its current state is so close to unstable regions of phase space.

  1. Detecting New Planets in Transiting Systems

    E-Print Network [OSTI]

    Jason H. Steffen

    2006-09-18T23:59:59.000Z

    I present an initial investigation into a new planet detection technique that uses the transit timing of a known, transiting planet. The transits of a solitary planet orbiting a star occur at equally spaced intervals in time. If a second planet is present, dynamical interactions within the system will cause the time interval between transits to vary. These transit time variations can be used to infer the orbital elements of the unseen, perturbing planet. I show analytic expressions for the amplitude of the transit time variations in several limiting cases. Under certain conditions the transit time variations can be comparable to the period of the transiting planet. I also present the application of this planet detection technique to existing transit observations of the TrES-1 and HD209458 systems. While no convincing evidence for a second planet in either system was found from those data, I constrain the mass that a perturbing planet could have as a function of the semi-major axis ratio of the two planets and the eccentricity of the perturbing planet. Near low-order, mean-motion resonances (within about 1% fractional deviation), I find that a secondary planet must generally have a mass comparable to or less than the mass of the Earth--showing that these data are the first to have sensitivity to sub Earth-mass planets orbiting main sequence stars. These results show that TTV will be an important tool in the detection and characterization of extrasolar planetary systems.

  2. Liquid-Solid Phase Transition Alloy as Reversible and Rapid Molding Bone Cement

    E-Print Network [OSTI]

    Yi, Liting; Liu, Jing

    2013-01-01T23:59:59.000Z

    Bone cement has been demonstrated as an essential restorative material in the orthopedic surgery. However current materials often imply unavoidable drawbacks, such as tissue-cement reaction induced thermal injuries and troublesome revision procedure. Here we proposed an injectable alloy cement to address such problems through its liquid-solid phase transition mechanism. The cement is made of a unique alloy BiInSnZn with a specifically designed low melting point 57.5{\\deg}C. This property enables its rapid molding into various shapes with high plasticity. Some fundamental characteristics including mechanical strength behaviors and phase transition-induced thermal features have been measured to demonstrate the competence of alloy as unconventional cement with favorable merits. Further biocompatible tests showed that this material could be safely employed in vivo. In addition, experiments also found the alloy cement capability as an excellent contrast agent for radiation imaging. Particularly, the proposed alloy...

  3. Aromaticity and Antiaromaticity in Transition-Metal Systems....

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

    Aromaticity and Antiaromaticity in Transition-Metal Systems. Aromaticity and Antiaromaticity in Transition-Metal Systems. Abstract: Aromaticity is an important concept in chemistry...

  4. 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

  5. Development of an advanced nanocalorimetry system for rapid material characterizations

    E-Print Network [OSTI]

    Liu, Yen-Shan

    2007-04-25T23:59:59.000Z

    The development of a versatile system capable of providing rapid, portable, and inexpensive detection of explosives and energetic compounds is needed critically to offer an enhanced level of protection against current and future threats to homeland...

  6. Methods and systems for rapid prototyping of high density circuits

    DOE Patents [OSTI]

    Palmer, Jeremy A. (Albuquerque, NM); Davis, Donald W. (Albuquerque, NM); Chavez, Bart D. (Albuquerque, NM); Gallegos, Phillip L. (Albuquerque, NM); Wicker, Ryan B. (El Paso, TX); Medina, Francisco R. (El Paso, TX)

    2008-09-02T23:59:59.000Z

    A preferred embodiment provides, for example, a system and method of integrating fluid media dispensing technology such as direct-write (DW) technologies with rapid prototyping (RP) technologies such as stereolithography (SL) to provide increased micro-fabrication and micro-stereolithography. A preferred embodiment of the present invention also provides, for example, a system and method for Rapid Prototyping High Density Circuit (RPHDC) manufacturing of solderless connectors and pilot devices with terminal geometries that are compatible with DW mechanisms and reduce contact resistance where the electrical system is encapsulated within structural members and manual electrical connections are eliminated in favor of automated DW traces. A preferred embodiment further provides, for example, a method of rapid prototyping comprising: fabricating a part layer using stereolithography and depositing thermally curable media onto the part layer using a fluid dispensing apparatus.

  7. Staged venting of fuel cell system during rapid shutdown

    DOE Patents [OSTI]

    Clingerman, Bruce J. (Palmyra, NY); Doan, Tien M. (Columbia, MD); Keskula, Donald H. (Webster, NY)

    2002-01-01T23:59:59.000Z

    A venting methodology and system for rapid shutdown of a fuel cell apparatus of the type used in a vehicle propulsion system. H.sub.2 and air flows to the fuel cell stack are slowly bypassed to the combustor upon receipt of a rapid shutdown command. The bypass occurs over a period of time (for example one to five seconds) using conveniently-sized bypass valves. Upon receipt of the rapid shutdown command, the anode inlet of the fuel cell stack is instantaneously vented to a remote vent to remove all H.sub.2 from the stack. Airflow to the cathode inlet of the fuel cell stack gradually diminishes over the bypass period, and when the airflow bypass is complete the cathode inlet is also instantaneously vented to a remote vent to eliminate pressure differentials across the stack.

  8. Staged venting of fuel cell system during rapid shutdown

    DOE Patents [OSTI]

    Keskula, Donald H.; Doan, Tien M.; Clingerman, Bruce J.

    2004-09-14T23:59:59.000Z

    A venting methodology and system for rapid shutdown of a fuel cell apparatus of the type used in a vehicle propulsion system. H.sub.2 and air flows to the fuel cell stack are slowly bypassed to the combustor upon receipt of a rapid shutdown command. The bypass occurs over a period of time (for example one to five seconds) using conveniently-sized bypass valves. Upon receipt of the rapid shutdown command, the anode inlet of the fuel cell stack is instantaneously vented to a remote vent to remove all H.sub.2 from the stack. Airflow to the cathode inlet of the fuel cell stack gradually diminishes over the bypass period, and when the airflow bypass is complete the cathode inlet is also instantaneously vented to a remote vent to eliminate pressure differentials across the stack.

  9. Transition pathways in complex systems: Reaction coordinates, isocommittor surfaces, and transition tubes

    E-Print Network [OSTI]

    Van Den Eijnden, Eric

    Transition pathways in complex systems: Reaction coordinates, isocommittor surfaces, and transition form 20 July 2005 Available online 18 August 2005 Abstract The mechanism of transition (reaction. These surfaces can be used to identify effective transition tubes inside which the reactive trajectories involved

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

    E-Print Network [OSTI]

    Walter, M.Todd

    Energy Transitions: A Systems Approach Including Marcellus Shale Gas Development A Report Engineering) W. VA #12;Energy Transitions: A Systems Approach August 2011 version Page 2 Energy Transitions sources globally, some very strong short-term drivers of energy transitions reflect rising concerns over

  11. RADII OF RAPIDLY ROTATING STARS, WITH APPLICATION TO TRANSITING-PLANET HOSTS

    SciTech Connect (OSTI)

    Brown, Timothy M., E-mail: tbrown@lcogt.ne [Las Cumbres Observatory Global Telescope, Goleta, CA 93117 (United States)

    2010-01-20T23:59:59.000Z

    The currently favored method for estimating radii and other parameters of transiting-planet host stars is to match theoretical models to observations of the stellar mean density rho{sub *}, the effective temperature T{sub eff}, and the composition parameter [Z]. This explicitly model-dependent approach is based on readily available observations, and results in small formal errors. Its performance will be central to the reliability of results from ground-based transit surveys such as TrES, HAT, and SuperWASP, as well as to the space-borne missions MOST, CoRoT, and Kepler. Here, I use two calibration samples of stars (eclipsing binaries (EBs) and stars for which asteroseismic analyses are available) having well-determined masses and radii to estimate the accuracy and systematic errors inherent in the rho{sub *} method. When matching to the Yonsei-Yale stellar evolution models, I find the most important systematic error results from selection bias favoring rapidly rotating (hence probably magnetically active) stars among the EB sample. If unaccounted for, this bias leads to a mass-dependent underestimate of stellar radii by as much as 4% for stars of 0.4 M{sub sun}, decreasing to zero for masses above about 1.4 M{sub sun}. Relative errors in estimated stellar masses are three times larger than those in radii. The asteroseismic sample suggests (albeit with significant uncertainty) that systematic errors are small for slowly rotating, inactive stars. Systematic errors arising from failings of the Yonsei-Yale models of inactive stars probably exist, but are difficult to assess because of the small number of well-characterized comparison stars having low mass and slow rotation. Poor information about [Z] is an important source of random error, and may be a minor source of systematic error as well. With suitable corrections for rotation, it is likely that systematic errors in the rho{sub *} method can be comparable to or smaller than the random errors, yielding radii that are accurate to about 2% for most stars.

  12. Unmanned Aerial Vehicle Instrumentation for Rapid Aerial Photo System

    E-Print Network [OSTI]

    Adiprawita, Widyawardana; Semibiring, Jaka

    2008-01-01T23:59:59.000Z

    This research will proposed a new kind of relatively low cost autonomous UAV that will enable farmers to make just in time mosaics of aerial photo of their crop. These mosaics of aerial photo should be able to be produced with relatively low cost and within the 24 hours of acquisition constraint. The autonomous UAV will be equipped with payload management system specifically developed for rapid aerial mapping. As mentioned before turn around time is the key factor, so accuracy is not the main focus (not orthorectified aerial mapping). This system will also be equipped with special software to post process the aerial photos to produce the mosaic aerial photo map

  13. Rapid cycling medical synchrotron and beam delivery system

    DOE Patents [OSTI]

    Peggs, Stephen G. (Port Jefferson, NY); Brennan, J. Michael (East Northport, NY); Tuozzolo, Joseph E. (Sayville, NY); Zaltsman, Alexander (Commack, NY)

    2008-10-07T23:59:59.000Z

    A medical synchrotron which cycles rapidly in order to accelerate particles for delivery in a beam therapy system. The synchrotron generally includes a radiofrequency (RF) cavity for accelerating the particles as a beam and a plurality of combined function magnets arranged in a ring. Each of the combined function magnets performs two functions. The first function of the combined function magnet is to bend the particle beam along an orbital path around the ring. The second function of the combined function magnet is to focus or defocus the particle beam as it travels around the path. The radiofrequency (RF) cavity is a ferrite loaded cavity adapted for high speed frequency swings for rapid cycling acceleration of the particles.

  14. DART's (Dallas Area Rapid Transit) LNG Bus Fleet Start-Up Experience (Alternative Fuel Transit Buses Brochure)

    SciTech Connect (OSTI)

    Battelle

    2000-06-30T23:59:59.000Z

    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.

  15. Rapid heating and cooling in two-dimensional Yukawa systems

    E-Print Network [OSTI]

    Yan Feng; Bin Liu; J. Goree

    2011-04-19T23:59:59.000Z

    Simulations are reported to investigate solid superheating and liquid supercooling of two-dimensional (2D) systems with a Yukawa interparticle potential. Motivated by experiments where a dusty plasma is heated and then cooled suddenly, we track particle motion using a simulation with Langevin dynamics. Hysteresis is observed when the temperature is varied rapidly in a heating and cooling cycle. As in the experiment, transient solid superheating, but not liquid supercooling, is observed. Solid superheating, which is characterized by solid structure above the melting point, is found to be promoted by a higher rate of temperature increase.

  16. Transition state theory and dynamical corrections in ergodic systems

    E-Print Network [OSTI]

    Van Den Eijnden, Eric

    Transition state theory and dynamical corrections in ergodic systems Fabio A. Tal and Eric Vanden, New York University, New York, USA Abstract. The results of transition state theory are derived manifold. A new perspective on how to compute the dynamical corrections to the TST transition frequency

  17. TRUFAS, a wavelet based algorithm for the rapid detection of planetary transits

    E-Print Network [OSTI]

    C. Regulo; M. Almenara; R. Alonso; H. J. Deeg; T. Roca Cortes

    2007-05-31T23:59:59.000Z

    Aims: We describe a fast, robust and automatic detection algorithm, TRUFAS, and apply it to data that are being expected from the CoRoT mission. Methods: The procedure proposed for the detection of planetary transits in light curves works in two steps: 1) a continuous wavelet transformation of the detrended light curve with posterior selection of the optimum scale for transit detection, and 2) a period search in that selected wavelet transformation. The detrending of the light curves are based on Fourier filtering or a discrete wavelet transformation. TRUFAS requires the presence of at least 3 transit events in the data. Results: The proposed algorithm is shown to identify reliably and quickly the transits that had been included in a standard set of 999 light curves that simulate CoRoT data. Variations in the pre-processing of the light curves and in the selection of the scale of the wavelet transform have only little effect on TRUFAS' results. Conclusions: TRUFAS is a robust and quick transit detection algorithm, especially well suited for the analysis of very large volumes of data from space or ground-based experiments, with long enough durations for the target-planets to produce multiple transit events.

  18. Quadratic Control of Stochastic Hybrid Systems with Renewal Transitions

    E-Print Network [OSTI]

    Hespanha, João Pedro

    Quadratic Control of Stochastic Hybrid Systems with Renewal Transitions Farshad R. Pour Safaei a, semi-Markov processes, optimal control, stochastic hybrid systems, renewal transitions 1 Introduction probability distributions other than the exponential. We consider a Stochastic Hybrid System with renewal

  19. 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...

  20. Design review report for the SY-101 RAPID mitigation system

    SciTech Connect (OSTI)

    SCHLOSSER, R.L.

    1999-05-24T23:59:59.000Z

    This report documents design reviews conducted of the SY-101 Respond And Pump In Days (RAPID) Mitigation System. As part of the SY-101 Surface-Level-Rise Remediation Project, the SY-101 WID Mitigation System will reduce the potential unacceptable consequences of crust growth in Tank 241-SY-101 (SY-101). Projections of the crust growth rate indicate that the waste level in the tank may reach the juncture of the primary and secondary confinement structures of the tank late in 1999. Because of this time constraint, many design activities are being conducted in parallel and design reviews were conducted for system adequacy as well as design implementation throughout the process. Design implementation, as used in this design review report, is the final component selection (e.g., which circuit breaker, valve, or thermocouple) that meets the approved design requirements, system design, and design and procurement specifications. Design implementation includes the necessary analysis, testing, verification, and qualification to demonstrate compliance with the system design and design requirements. Design implementation is outside the scope of this design review. The design activities performed prior to detailed design implementation (i.e., system mission requirements, functional design requirements, technical criteria, system conceptual design, and where design and build contracts were placed, the procurement specification) have been reviewed and are within the scope of this design review report. Detailed design implementation will be controlled, reviewed, and where appropriate, approved in accordance with Tank Waste Remediation System (TWRS) engineering procedures. Review of detailed design implementation will continue until all components necessary to perform the transfer function are installed and tested.

  1. 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

    2013-06-11T23:59:59.000Z

    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.

  2. Flexible metallic 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

    2014-04-22T23:59:59.000Z

    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.

  3. How to Catch Up with the Industrial World--Achieving Rapid Growth in Europe's Transition Economies

    E-Print Network [OSTI]

    performance of the less advanced EU economies--Greece, Ireland, Portugal, and Spain. Although Ireland, Portugal, and Spain each grew rapidly in the last five years of the 1980s, that proved to be a short phase in the past fifteen years, and Spain and Portugal grew very slowly in the early 1980s and the early 1990s

  4. REAL-TIME ACTIVE PIPELINE INTEGRITY DETECTION (RAPID) SYSTEM FOR CORROSION DETECTION AND QUANTIFICATION

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    alone there are over 2 million miles of natural gas transmission and distribution pipeline providing 24REAL-TIME ACTIVE PIPELINE INTEGRITY DETECTION (RAPID) SYSTEM FOR CORROSION DETECTION detection Acellent has developed a Real-time Active Pipeline Integrity Detection (RAPID) system. The RAPID

  5. 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

  6. 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)

    2011-01-15T23:59:59.000Z

    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.

  7. South Africa-GTZ Bus Rapid Transit Johannesburg | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistmaSinosteelSolarSolkar SolarSomontDevelopingGTZ Bus Rapid

  8. Superconducting transition temperature in heterogeneous ferromagnet-superconductor systems

    E-Print Network [OSTI]

    Pokrovsky, Valery L.; Wei, HD.

    2004-01-01T23:59:59.000Z

    We study the superconducting phase transition in two systems: ferromagnet-superconductor bilayer (FSB) and a thin superconducting film with a periodic array of magnetic dots (SFMD) upon it. We show that this transition is of the first order in FSB...

  9. Functional requirements and technical criteria for the 241-SY-101 RAPID mitigation system

    SciTech Connect (OSTI)

    ERHART, M.F.

    1999-02-26T23:59:59.000Z

    This document provides functional, performance, and design criteria for the RAPID Mitigation System. In addition, critical interface, design assumptions, and analytical requirements are identified.

  10. Rapid Surface Sampling and Archival Record (RSSAR) System. Topical report, October 1, 1993--December 31, 1994

    SciTech Connect (OSTI)

    NONE

    1997-06-01T23:59:59.000Z

    This report describes the results of Phase 1 efforts to develop a Rapid Surface Sampling and Archival Record (RSSAR) System for the detection of semivolatile organic contaminants on concrete, transite, and metal surfaces. The characterization of equipment and building surfaces for the presence of contaminants as part of building decontamination and decommissioning activities is an immensely large tacks of concern to both government and industry. Contaminated and clean materials must be clearly identified and segregated so that the clean materials can be recycled or reused, if possible, or disposed of more cheaply as nonhazardous waste. Characterization of building and equipment surfaces will be needed during initial investigations, during cleanup operations, and during the final confirmatory process, increasing the total number of samples well beyond that needed for initial characterization. This multiplicity of information places a premium on the ability to handle and track data as efficiently as possible. Aware of the shortcomings of traditional surface characterization technology, GE, with DOE support has undertaken a 12-month effort to complete Phase 1 of a proposed four-phase program to develop the RSSAR system. The objectives of this work are to provide instrumentation to cost-effectively sample concrete and steel surfaces, provide a quick-look indication for the presence or absence of contaminants, and collect samples for later, more detailed analysis in a readily accessible and addressable form. The Rapid Surface Sampling and Archival Record (RSSAR) System will be a modular instrument made up of several components: (1) sampling heads for concrete surfaces, steel surfaces, and bulk samples; (2) quick-look detectors for photoionization and ultraviolet; (3) multisample trapping module to trap and store vaporized contaminants in a manner suitable for subsequent detailed lab-based analyses.

  11. Risk Modelling the Transition of SCADA System to IPv6

    E-Print Network [OSTI]

    Boyer, Edmond

    Risk Modelling the Transition of SCADA System to IPv6 Suriadi Suriadi, Alan Tickle, Ejaz Ahmed.morarji@qut.edu.au Abstract. SCADA is one of a set of manufacturing-and-control systems that are used to monitor and control6 protocol and inevitably this change will affect SCADA systems. However IPv6 introduces its own set

  12. Rapid three-dimensional manufacturing of microfluidic structures using a scanning laser system

    E-Print Network [OSTI]

    Rapid three-dimensional manufacturing of microfluidic structures using a scanning laser system Biao-dimensional manufacturing approach to the rapid processing of microfluidic structures using a scanning laser system. The scanning laser manufacturing technique could be potentially applied to a wide range of materials,10

  13. Feedback damper system for quadrupole oscillations after transition at RHIC.

    SciTech Connect (OSTI)

    Abreu,N.; Blaskiewicz, M.; Brennan, J.M.; Schultheiss, C.

    2008-06-23T23:59:59.000Z

    The heavy ion beam at RHIC undergoes strong quadrupole oscillations just after it crosses transition, which leads to an increase in bunch length making rebucketing less effective. A feedback system was built to damp these quadrupole oscillations and in this paper the characteristics of the system and the results obtained are presented and discussed.

  14. Rapid Deployment Shelter System | Y-12 National Security Complex

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeedingTechnicalPurchase, Delivery,Assistance ProgramLivingstonRandallRapid

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

    SciTech Connect (OSTI)

    Riley, C.; Sandor, D.

    2008-06-01T23:59:59.000Z

    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.

  16. ARCHITECTURE AND DYNAMICS OF KEPLER'S CANDIDATE MULTIPLE TRANSITING PLANET SYSTEMS

    SciTech Connect (OSTI)

    Lissauer, Jack J.; Jenkins, Jon M.; Borucki, William J.; Bryson, Stephen T.; Howell, Steve B. [NASA Ames Research Center, Moffett Field, CA 94035 (United States); Ragozzine, Darin; Holman, Matthew J.; Carter, Joshua A. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Fabrycky, Daniel C.; Fortney, Jonathan J. [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Steffen, Jason H. [Fermilab Center for Particle Astrophysics, Batavia, IL 60510 (United States); Ford, Eric B. [211 Bryant Space Science Center, University of Florida, Gainesville, FL 32611 (United States); Shporer, Avi [Las Cumbres Observatory Global Telescope Network, Santa Barbara, CA 93117 (United States); Rowe, Jason F.; Quintana, Elisa V.; Caldwell, Douglas A. [SETI Institute/NASA Ames Research Center, Moffett Field, CA 94035 (United States); Batalha, Natalie M. [Department of Physics and Astronomy, San Jose State University, San Jose, CA 95192 (United States); Ciardi, David [Exoplanet Science Institute/Caltech, Pasadena, CA 91125 (United States); Dunham, Edward W. [Lowell Observatory, Flagstaff, AZ 86001 (United States); Gautier, Thomas N. III, E-mail: Jack.Lissauer@nasa.gov [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States); and others

    2011-11-01T23:59:59.000Z

    About one-third of the {approx}1200 transiting planet candidates detected in the first four months of Kepler data are members of multiple candidate systems. There are 115 target stars with two candidate transiting planets, 45 with three, 8 with four, and 1 each with five and six. We characterize the dynamical properties of these candidate multi-planet systems. The distribution of observed period ratios shows that the vast majority of candidate pairs are neither in nor near low-order mean-motion resonances. Nonetheless, there are small but statistically significant excesses of candidate pairs both in resonance and spaced slightly too far apart to be in resonance, particularly near the 2:1 resonance. We find that virtually all candidate systems are stable, as tested by numerical integrations that assume a nominal mass-radius relationship. Several considerations strongly suggest that the vast majority of these multi-candidate systems are true planetary systems. Using the observed multiplicity frequencies, we find that a single population of planetary systems that matches the higher multiplicities underpredicts the number of singly transiting systems. We provide constraints on the true multiplicity and mutual inclination distribution of the multi-candidate systems, revealing a population of systems with multiple super-Earth-size and Neptune-size planets with low to moderate mutual inclinations.

  17. Transition from spatial coherence to incoherence in coupled chaotic systems

    E-Print Network [OSTI]

    Iryna Omelchenko; Bruno Riemenschneider; Philipp Hövel; Yuri Maistrenko; Eckehard Schöll

    2012-01-18T23:59:59.000Z

    We investigate the spatio-temporal dynamics of coupled chaotic systems with nonlocal interactions, where each element is coupled to its nearest neighbors within a finite range. Depending upon the coupling strength and coupling radius, we find characteristic spatial patterns such as wave-like profiles and study the transition from coherence to incoherence leading to spatial chaos. We analyze the origin of this transition based on numerical simulations and support the results by theoretical derivations identifying a critical coupling strength and a scaling relation of the coherent profiles. To demonstrate the universality of our findings we consider time-discrete as well as time-continuous chaotic models realized as logistic map and R\\"ossler or Lorenz system, respectively. Thereby we establish the coherence-incoherence transition in networks of coupled identical oscillators.

  18. Modeling Transit Trip Time Using Archived Bus Dispatch System Data

    E-Print Network [OSTI]

    Bertini, Robert L.

    Transportation District of Oregon TriMet provides transit service in the three-county Portland metropolitan area that are automatically collected and archived for each bus, route, and stop every day. The Tri-County Metropolitan. TriMet has implemented a Bus Dispatch System BDS as a part of its overall service control

  19. INFINITY 2004 Preliminary Version Inference of Timed Transition Systems

    E-Print Network [OSTI]

    Leucker, Martin

    INFINITY 2004 Preliminary Version Inference of Timed Transition Systems Olga Grinchtein 1 Bengt or implementation. In software verification, techniques are being developed for generating abstract models of software modules by static analysis of source code (e.g., [10,20]). However, peripheral hardware components

  20. 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

  1. Fuel cell system logic for differentiating between rapid and normal shutdown commands

    DOE Patents [OSTI]

    Keskula, Donald H. (Webster, NY); Doan, Tien M. (Columbia, MD); Clingerman, Bruce J. (Palmyra, NY)

    2000-01-01T23:59:59.000Z

    A method of controlling the operation of a fuel cell system wherein each shutdown command for the system is subjected to decision logic which determines whether the command should be a normal shutdown command or rapid shutdown command. If the logic determines that the shutdown command should be a normal shutdown command, then the system is shutdown in a normal step-by-step process in which the hydrogen stream is consumed within the system. If the logic determines that the shutdown command should be a rapid shutdown command, the hydrogen stream is removed from the system either by dumping to atmosphere or routing to storage.

  2. Jamming at the laning-flocking transition in systems of self-propelled rods

    E-Print Network [OSTI]

    Hui-Shun Kuan; Robert Blackwell; Matthew A. Glaser; M. D. Betterton

    2014-07-17T23:59:59.000Z

    Non-equilibrium active matter made up of self-driven particles exhibits collective motion and nonequilibrium order-disorder transitions. Self-propelled rod models with short-range repulsive interactions are a useful minimal system to study active matter. We simulated high-aspect-ratio self-propelled rods with varying packing fraction and driving. Two characteristic phases, the flocking and laning phases, occupy much of the phase diagram. We study the laning-flocking transition and the emergence of the laning state from the equilibrium nematic. For low packing fraction, driving induces formation of a clustered flocking phase, as observed previously. In flocks the average pressure is high and structural and mechanical relaxation times are long. These results suggest that rods in flocks are in a translating jammed state with an internal structure similar to a jammed solid despite overall flock motion. For higher packing fraction, a laning state emerges in response to driving, with polar domains that vary in size with the driving force. The average pressure is relatively low and structural and mechanical relaxation times are short, showing fluid-like behavior. Both structural and mechanical properties vary rapidly upon lowering the packing fraction from the laning to flocking regime, suggesting an abrupt dynamic phase transition occurs in this system. We propose that the laning-flocking transition is a type of jamming transition which, in contrast to other jamming systems, occurs as density is decreased. In contrast, the laning state appears to emerge continuously from the equilibrium nematic as driving is increased.

  3. Progress on Earthquake Rapid Reporting and Early Warning Systems Yih-Min Wu1

    E-Print Network [OSTI]

    Wu, Yih-Min

    Progress on Earthquake Rapid Reporting and Early Warning Systems in Taiwan Yih-Min Wu1 , Ta (RRS) and earthquake early warning (EWS) systems developed at the Central Weather Bureau (CWB), using a significant step towards a more realistic earthquake early warning capability. This early warning system has

  4. Energy cost reduction study of the Washington Metropolitan Area Transit Authority metrorail system. volume 2: appendices. Final report

    SciTech Connect (OSTI)

    Uher, R.A.; Sathi, N.; Sathi, A.

    1982-05-01T23:59:59.000Z

    This study is the first time that the Energy Management Model (EMM), developed for the transit industry by the Rail Systems Center at Carnegie-Mellon University, was comprehensively applied to a rapid transit property. The application to Metrorail was verified by comparing the simulated results to actual data obtained from the Potomac Electric Power Company (PEPCO). The simulated results agree to within 3 percent of the actual energy consumption. Five energy conservation strategies were recommended for implementation based on high benefit and low cost, namely: coasting, catch-up operation, passenger load factor improvement, regeneration of braking energy, and passenger station lighting improvements.

  5. Bootstrapping phase transitions in QCD and frustrated spin systems

    E-Print Network [OSTI]

    Yu Nakayama; Tomoki Ohtsuki

    2014-08-11T23:59:59.000Z

    In view of its physical importance in predicting the order of chiral phase transitions in QCD and frustrated spin systems, we perform the conformal bootstrap program of $O(n)\\times O(2)$-symmetric conformal field theories in $d=3$ dimensions with a special focus on $n=3$ and $4$. The existence of renormalization group fixed points with these symmetries has been controversial over years, but our conformal bootstrap program provides the non-perturbative evidence. In both $n=3$ and $4$ cases, we find singular behaviors in the bounds of scaling dimensions of operators in two different sectors, which we claim correspond to chiral and collinear fixed points, respectively. In contrast to the cases with larger values of $n$, we find no evidence for the anti-chiral fixed point. Our results indicate the possibility that the chiral phase transitions in QCD and frustrated spin systems are continuous with the critical exponents that we predict from the conformal bootstrap program.

  6. Modelling and Veri cation of Automated Transit Systems, using Timed Automata, Invariants and

    E-Print Network [OSTI]

    Lynch, Nancy

    and gates, steam boiler control) appear in 8, 10]. Brie y, a timed automaton is a labelled transition system

  7. Phase transitions in the adsorption system Li/Mo(112)

    E-Print Network [OSTI]

    Fedorus, A.; Kolthoff, D.; Koval, V.; Lyuksyutov, Igor F.; Naumovets, AG; Pfnur, H.

    2000-01-01T23:59:59.000Z

    limit can be quasi-one-dimensional. Such model systems are formed upon submonolayer adsorption on surfaces with strongly an- PRB 620163-1829/2000/62~4!/2852~10!/$15.00 n system Li?Mo?112? ,1,3 A. G. Naumovets,1 and H. Pfnu?r2,* , Prospect Nauki 46... W/Re thermocouple and was con- trolled by a computerized feedback circuit with a resolution of 0.01 K. The source of lithium was constructed and outgassed as PRB 62 PHASE TRANSITIONS IN TH described in Ref. 6. The LEED patterns have been taken...

  8. Modal Transition Systems with Weight Intervals , Kim G. Larsen, Jiri Srba1

    E-Print Network [OSTI]

    Srba, Jiri

    Modal Transition Systems with Weight Intervals Line Juhl , Kim G. Larsen, Jir´i Srba1 Aalborg weighted modal transition systems, an extension to the well-studied specification formalism of modal transition systems that allows to express both required and optional behaviours of their intended

  9. TRANSIT TIMING VARIATIONS FOR INCLINED AND RETROGRADE EXOPLANETARY SYSTEMS

    SciTech Connect (OSTI)

    Payne, Matthew J.; Ford, Eric B.; Veras, Dimitri [Department of Astronomy, University of Florida, 211 Bryant Space Science Center, PO Box 112055, Gainesville, FL 32611-2055 (United States)], E-mail: matthewjohnpayne@gmail.com

    2010-03-20T23:59:59.000Z

    We perform numerical calculations of the expected transit timing variations (TTVs) induced on a hot-Jupiter by an Earth-mass perturber. Motivated by the recent discoveries of retrograde transiting planets, we concentrate on an investigation of the effect of varying relative planetary inclinations, up to and including completely retrograde systems. We find that planets in low-order (e.g., 2:1) mean-motion resonances (MMRs) retain approximately constant TTV amplitudes for 0 deg. < i < 170 deg., only reducing in amplitude for i>170 deg. Systems in higher order MMRs (e.g., 5:1) increase in TTV amplitude as inclinations increase toward 45 deg., becoming approximately constant for 45 deg. < i < 135 deg., and then declining for i>135 deg. Planets away from resonance slowly decrease in TTV amplitude as inclinations increase from 0 deg. to 180 deg., whereas planets adjacent to resonances can exhibit a huge range of variability in TTV amplitude as a function of both eccentricity and inclination. For highly retrograde systems (135 deg. < i {<=} 180 deg.), TTV signals will be undetectable across almost the entirety of parameter space, with the exceptions occurring when the perturber has high eccentricity or is very close to an MMR. This high inclination decrease in TTV amplitude (on and away from resonance) is important for the analysis of the known retrograde and multi-planet transiting systems, as inclination effects need to be considered if TTVs are to be used to exclude the presence of any putative planetary companions: absence of evidence is not evidence of absence.

  10. On Mechanical Transitions in Biologically Motivated Soft Matter Systems

    E-Print Network [OSTI]

    Fogle, Craig Alton

    2015-01-01T23:59:59.000Z

    et al. “Nanocellulose aerogels functionalized by rapidProspects of polysaccharide aerogels as modern advanced food

  11. MOST Spacebased Photometry of the Transiting Exoplanet System HD 209458: Transit Timing to Search for Additional Planets

    E-Print Network [OSTI]

    E. Miller-Ricci; J. F. Rowe; D. Sasselov; J. M. Matthews; D. B. Guenther; R. Kuschnig; A. F. J Moffat; S. M. Rucinski; G. A. H Walker; W. W. Weiss

    2008-02-05T23:59:59.000Z

    We report on the measurement of transit times for the HD 209458 planetary system from photometry obtained with the MOST (Microvariability & Oscillations of STars) space telescope. Deviations from a constant orbital period can indicate the presence of additional planets in the system that are yet undetected, potentially with masses approaching an Earth mass. The MOST data sets of HD 209458 from 2004 and 2005 represent unprecedented time coverage with nearly continuous observations spanning 14 and 43 days and monitoring 3 transits and 12 consecutive transits, respectively. The transit times we obtain show no variations on three scales: (a) no long-term change in P since before 2004 at the 25 ms level, (b) no trend in transit timings during the 2005 run, and (c) no individual transit timing deviations above 80 sec level. Together with previously published transit times from Agol & Steffen (2007), this allows us to place limits on the presence of additional close-in planets in the system, in some cases down to below an Earth mass. This result, along with previous radial velocity work, now eliminates the possibility that a perturbing planet could be responsible for the additional heat source needed to explain HD 209458b's anomalous low density.

  12. STOCHASTIC HYBRID SYSTEMS WITH RENEWAL TRANSITIONS: MOMENT ANALYSIS WITH APPLICATION TO

    E-Print Network [OSTI]

    Hespanha, João Pedro

    STOCHASTIC HYBRID SYSTEMS WITH RENEWAL TRANSITIONS: MOMENT ANALYSIS WITH APPLICATION TO NETWORKED motivated us to refer to these systems as Stochastic Hybrid Systems with Renewal Transitions. This class Stochastic Hybrid Systems (SHSs) for which the lengths of times that the system stays in each mode

  13. Benchmarking Best Practices of Demand Responsive Transit Systems

    E-Print Network [OSTI]

    Dessouky, Maged; Palmer, Kurt; Abdelmaguid, Tamer

    2003-01-01T23:59:59.000Z

    Transit District Greater Attleboro - Taunton RegionalHartford Hamden Bridgeport Attleboro Portland Milford Albany

  14. Soil Vapor Extraction System Optimization, Transition, and Closure Guidance

    SciTech Connect (OSTI)

    Truex, Michael J.; Becker, Dave; Simon, Michelle A.; Oostrom, Martinus; Rice, Amy K.; Johnson, Christian D.

    2013-02-08T23:59:59.000Z

    Soil vapor extraction (SVE) is a prevalent remediation approach for volatile contaminants in the vadose zone. A diminishing rate of contaminant extraction over time is typically observed due to 1) diminishing contaminant mass, and/or 2) slow rates of removal for contamination in low-permeability zones. After a SVE system begins to show indications of diminishing contaminant removal rate, SVE performance needs to be evaluated to determine whether the system should be optimized, terminated, or transitioned to another technology to replace or augment SVE. This guidance specifically addresses the elements of this type of performance assessment. While not specifically presented, the approach and analyses in this guidance could also be applied at the onset of remediation selection for a site as a way to evaluate current or future impacts to groundwater from vadose zone contamination. The guidance presented here builds from existing guidance for SVE design, operation, optimization, and closure from the U.S. Environmental Protection Agency, U.S. Army Corps of Engineers, and the Air Force Center for Engineering and the Environment. The purpose of the material herein is to clarify and focus on the specific actions and decisions related to SVE optimization, transition, and/or closure.

  15. Transition State Theory for dissipative systems without a dividing surface

    E-Print Network [OSTI]

    Revuelta, F; Benito, R M; Borondo, F

    2015-01-01T23:59:59.000Z

    Transition State Theory is a central cornerstone in reaction dynamics. Its key step is the identification of a dividing surface that is crossed only once by all reactive trajectories. This assumption is often badly violated, especially when the reactive system is coupled to an environment. The calculations made in this way then overestimate the reaction rate and the results depend critically on the choice of the dividing surface. In this Letter, we study the phase space of a stochastically driven system close to an energetic barrier in order to identify the geometric structure unambiguously determining the reactive trajectories, which is then incorporated in a simple rate formula for reactions in condensed phase that is both independent of the dividing surface and exact.

  16. Stochastic Hybrid Systems with Renewal Transitions Duarte Antunes, Jo~ao P. Hespanha, and Carlos Silvestre

    E-Print Network [OSTI]

    Hespanha, João Pedro

    Stochastic Hybrid Systems with Renewal Transitions Duarte Antunes, Jo~ao P. Hespanha, and Carlos], which motivated us to refer to these systems as stochastic hybrid systems with renewal transitions Silvestre Abstract-- We consider Stochastic Hybrid Systems (SHSs) for which the lengths of times

  17. he application of rapid prototyping (RP) in fabricat-ing nonassembly robotic systems with inserts is pre-

    E-Print Network [OSTI]

    Mavroidis, Constantinos

    T he application of rapid prototyping (RP) in fabricat- ing nonassembly robotic systems for the rapid and automatic design and fabrication of robotic sys- tems a reality is to study the application with inserts is pre- sented in this article. The development of robotic systems that have all necessary

  18. Multi Optical Transition Radiation System for ATF2

    SciTech Connect (OSTI)

    Alabau-Gonzalvo, Javier; /Valencia U., IFIC; Blanch Gutierrez, Cesar; /Valencia U., IFIC; Civera, Jose Vicente; /Valencia U., IFIC; Faus-Golfe, Angeles; /Valencia U., IFIC; Garcia-Garrigos, Juan; /Valencia U., IFIC; Cruz, Juan; /SLAC; McCormick, Douglas; /SLAC; White, Glen; /SLAC

    2012-07-13T23:59:59.000Z

    In this paper we describe the design, installation and first calibration tests of a Multi Optical Transition Radiation System in the beam diagnostic section of the Extraction (EXT) line of ATF2, close to the multi wire scanner system. This system will be a valuable tool for measuring beam sizes and emittances coming from the ATF Damping Ring. With an optical resolution of about 2 {micro}m an original OTR design (OTR1X) located after the septum at the entrance of the EXT line demonstrated the ability to measure a 5.5 {micro}m beam size in one beam pulse and to take many fast measurements. This gives the OTR the ability to measure the beam emittance with high statistics, giving a low error and a good understanding of emittance jitter. Furthermore the nearby wire scanners will be a definitive test of the OTR as a beam emittance diagnostic device. The multi-OTR system design proposed here is based on the existing OTR1X.

  19. Magnetic field induced phase transition in multiferroic BiFe{sub 1-x}Ti{sub x}O{sub 3} ceramics prepared by rapid liquid phase sintering

    SciTech Connect (OSTI)

    Kumar, Manoj; Yadav, K. L. [Smart Materials Research Laboratory, Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667 (India)

    2007-09-10T23:59:59.000Z

    Single phase BiFe{sub 1-x}Ti{sub x}O{sub 3} (BFTO) ceramics with varying x up to 0.35 were prepared by a rapid liquid phase sintering method to study the influence of Ti doping on their crystal structure, morphology, and magnetic behavior. Rhombohedral to orthorhombic phase was observed above x{>=}0.33. The BFTO ceramics were highly resistive and with uniform morphology. Magnetic measurements revealed an increase in magnetization with the increase in Ti content and was maximum for x=0.2 ceramic. Surprisingly, a magnetic field induced phase transition from weak ferromagnetic to diamagnetic above 50 kOe was observed for x=0.30 and 0.315 ceramics.

  20. The Effect of Mass Transit Systems on Price of Condominium in Bangkok

    E-Print Network [OSTI]

    Sadoulet, Elisabeth

    with strong supply and demand of high-quality and affordable housing projects. These properties' s prices haveThe Effect of Mass Transit Systems on Price of Condominium in Bangkok Undergraduate Honor Thesis. A hedonic price model is used to analyze the effect of mass transit systems on the price of condominiums

  1. A rapid whole genome sequencing and analysis system supporting genomic epidemiology (7th Annual SFAF Meeting, 2012)

    ScienceCinema (OSTI)

    FitzGerald, Michael [Broad Institute

    2013-02-12T23:59:59.000Z

    Michael FitzGerald on "A rapid whole genome sequencing and analysis system supporting genomic epidemiology" at the 2012 Sequencing, Finishing, Analysis in the Future Meeting held June 5-7, 2012 in Santa Fe, New Mexico.

  2. Rapid and Efficient Trifluoromethylation of Aromatic and Heteroaromatic Compounds Using Potassium Trifluoroacetate Enabled by a Flow System

    E-Print Network [OSTI]

    Chen, Mao

    The trifluoromethylation of aryl/heteroaryl iodides has been demonstrated using a flow system, thus enabling a rapid rate of reaction. A broad spectrum of trifluoromethylated compounds was prepared in good to excellent ...

  3. The Design of a RapidDischarge Varistor System for the MICE Magnet Circuits

    SciTech Connect (OSTI)

    Green, Michael A.

    2008-07-23T23:59:59.000Z

    The need for a magnet circuit discharge system, in order to protect the magnet HTS leads during a power failure, has been discussed in recent MICE reports [1], [2]. In order to rapidly discharge a magnet, one has to put enough resistance across the lead. The resistance in this case is varistor that is put across the magnet in the event of a power outage. The resistance consists of several diodes, which act as constant voltage resistors and the resistance of the cables connecting the magnets in the circuit to each other and to the power supply. In order for the rapid discharge system to work without quenching the magnets, the voltage across the magnets must be low enough so that the diodes in the quench protection circuit don't fire and cause the magnet current to bypass the superconducting coils. It is proposed that six rapid discharge varistors be installed across the three magnet circuits the power the tracker solenoids, which are connected in series. The focusing magnets, which are also connected in series would have three varistors (one for each magnet). The coupling magnets would have a varistor for each magnet. The peak voltage that is allowed per varistor depends on the number of quench protection diodes that make up the quench protection circuit for each magnet coil circuit. It is proposed that the varistors be water cooled as the magnet circuits are being discharged through them. The water cooling circuit can be supplied with tap water. The tap water flows only when the varistor temperature reaches a temperature of 45 C.

  4. Contactless prepaid and bankcards in transit fare collection systems

    E-Print Network [OSTI]

    Brakewood, Candace Elizabeth

    2010-01-01T23:59:59.000Z

    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 ...

  5. QCD Multipole Expansion and Hadronic Transitions in Heavy Quarkonium Systems

    E-Print Network [OSTI]

    Yu-Ping Kuang

    2006-01-18T23:59:59.000Z

    We review the developments of QCD multipole expansion and its applications to hadronic transitions and some radiative decays of heavy quarkonia. Theoretical predictions are compsred with updated experimental results.

  6. TRANSIT TIMING OBSERVATIONS FROM KEPLER. VI. POTENTIALLY INTERESTING CANDIDATE SYSTEMS FROM FOURIER-BASED STATISTICAL TESTS

    SciTech Connect (OSTI)

    Steffen, Jason H. [Fermilab Center for Particle Astrophysics, P.O. Box 500, MS 127, Batavia, IL 60510 (United States); Ford, Eric B. [Astronomy Department, University of Florida, 211 Bryant Space Sciences Center, Gainesville, FL 32111 (United States); Rowe, Jason F.; Borucki, William J.; Bryson, Steve; Caldwell, Douglas A.; Jenkins, Jon M.; Koch, David G.; Sanderfer, Dwight T.; Seader, Shawn; Twicken, Joseph D. [NASA Ames Research Center, Moffett Field, CA 94035 (United States); Fabrycky, Daniel C. [UCO/Lick Observatory, University of California, Santa Cruz, CA 95064 (United States); Holman, Matthew J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Welsh, William F. [Astronomy Department, San Diego State University, San Diego, CA 92182-1221 (United States); Batalha, Natalie M. [Department of Physics and Astronomy, San Jose State University, San Jose, CA 95192 (United States); Ciardi, David R. [NASA Exoplanet Science Institute/California Institute of Technology, Pasadena, CA 91125 (United States); Kjeldsen, Hans [Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark); Prsa, Andrej, E-mail: jsteffen@fnal.gov [Department of Astronomy and Astrophysics, Villanova University, 800 East Lancaster Avenue, Villanova, PA 19085 (United States)

    2012-09-10T23:59:59.000Z

    We analyze the deviations of transit times from a linear ephemeris for the Kepler Objects of Interest (KOI) through quarter six of science data. We conduct two statistical tests for all KOIs and a related statistical test for all pairs of KOIs in multi-transiting systems. These tests identify several systems which show potentially interesting transit timing variations (TTVs). Strong TTV systems have been valuable for the confirmation of planets and their mass measurements. Many of the systems identified in this study should prove fruitful for detailed TTV studies.

  7. Spin-Orbit Alignment of the TrES-4 Transiting Planetary System and Possible Additional Radial-Velocity Variation

    E-Print Network [OSTI]

    Narita, Norio

    We report new radial velocities of the TrES-4 transiting planetary system, including observations of

  8. Laser frequency stabilization to highly excited state transitions using electromagnetically induced transparency in a cascade system

    E-Print Network [OSTI]

    R. P. Abel; A. K. Mohapatra; M. G. Bason; J. D. Pritchard; K. J. Weatherill; U. Raitzsch; C. S. Adams

    2009-03-05T23:59:59.000Z

    We demonstrate laser frequency stabilization to excited state transitions using cascade electromagnetically induced transparency (EIT). Using a room temperature Rb vapor cell as a reference, we stabilize a first diode laser to the D2 transition and a second laser to a transition from the intermediate state to a Rydberg state with principal quantum number n=19 - 70. A combined laser linewidth of 280 kHz over a 0.1 ms time period is achieved. This method may be applied generally to any cascade system and allows laser stabilization to an atomic reference in the absence of strong optical transitions.

  9. Laboratory and field corrosion test results on aluminum-transition-steel systems on automobiles

    SciTech Connect (OSTI)

    Haynes, G.; Baboian, R. [Texas Instruments Inc., Attleboro, MA (United States). Electrochemical and Corrosion Lab.

    1995-11-01T23:59:59.000Z

    Use of steel clad aluminum transition material to join aluminum body panels and structural members to steel is demonstrated. The transition material allows joining of aluminum and steel by conventional techniques such as spot welding and eliminates galvanic corrosion at the joints. Corrosion test results for a wide range of aluminum-transition-steel systems in laboratory tests, atmospheric exposure, and field test plates are presented. The break strength of joints containing two, three, or four members was used as a measure of performance after corrosion testing. Statistical analysis of the results showed that the transition material prevented degradation of the mechanical properties of the joints.

  10. A proposed second harmonic acceleration system for the Intense Pulsed Neutron Source Rapid Cycling Synchrotron

    SciTech Connect (OSTI)

    Norem, J.; Brandeberry, F.; Rauchas, A.

    1983-08-01T23:59:59.000Z

    The Rapid Cycling Synchrotron (RCS) of the Intense Pulsed Neutron Source (IPNS) operating at Argonne National Laboratory is presently producing intensities of 2-2.5 x 10/sup 12/ protons per pulse (ppp) with the addition of a new ion source. This intensity is close to the space charge limit of the machine, estimated at about 3 x 10/sup 12/ ppp, depending somewhat on the available aperture. With the present good performance in mind, accelerator improvements are being directed at increasing beam intensities for neutron science, lowering acceleration losses to minimize activation, and gaining better control of the beam so that losses can be made to occur when and where they can be most easily controlled. On the basis of preliminary measurements, the authors are now proposing a third cavity for the RF system which would provide control of the longitudinal bunch shape during the cycle which would permit raising the effective space charge limit of the accelerator and reducing losses.

  11. QUANTUM PHASE TRANSITIONS IN MAGNETIC SYSTEMS Omid Nohadani

    E-Print Network [OSTI]

    Nohadani, Omid

    the discovery of a new phase of matter, the Bose-Einstein condensate, out of a gas of rubidium atoms. 4 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 3.2 Quantum Phase Transition . . . . . . . . . . . . . . . . . . . . . . . 59 3.3 Scaling Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 5 Bose-Einstein Condensation of Magnons 93 5.1 Introduction

  12. Transition pathways in complex systems: Application of the finite-temperature string method to the alanine dipeptide

    E-Print Network [OSTI]

    Van Den Eijnden, Eric

    Transition pathways in complex systems: Application of the finite-temperature string method is a very effective way of identifying transition mechanisms and transition rates between metastable states, in the region of configuration space where the most probable transition trajectories are concentrated

  13. Systems Biology Analysis of Brucella Infected Peyers Patch Reveals Rapid Invasion with Modest Transient Perturbations of the Host Transcriptome

    E-Print Network [OSTI]

    Rossetti, Carlos A.; Drake, Kenneth L.; Siddavatam, Prasad; Lawhon, Sara D.; Nunes, Jairo E.; Gull, Tamara; Khare, Sangeeta; Everts, Robin E.; Lewin, Harris A.; Adams, Leslie Garry

    2013-12-09T23:59:59.000Z

    Systems Biology Analysis of Brucella Infected Peyer’s Patch Reveals Rapid Invasion with Modest Transient Perturbations of the Host Transcriptome Carlos A. Rossetti1¤a, Kenneth L. Drake2, Prasad Siddavatam2, Sara D. Lawhon1, Jairo E. S. Nunes1... mechanisms. Citation: Rossetti CA, Drake KL, Siddavatam P, Lawhon SD, Nunes JES, et al. (2013) Systems Biology Analysis of Brucella Infected Peyer’s Patch Reveals Rapid Invasion with Modest Transient Perturbations of the Host Transcriptome. PLoS ONE 8(12): e...

  14. Transition to complete synchronization and global intermittent synchronization in an array of time-delay systems

    E-Print Network [OSTI]

    R. Suresh; D. V. Senthilkumar; M. Lakshmanan; J. Kurths

    2012-07-20T23:59:59.000Z

    We report the nature of transitions from nonsynchronous to complete synchronization (CS) state in arrays of time-delay systems, where the systems are coupled with instantaneous diffusive coupling. We demonstrate that the transition to CS occurs distinctly for different coupling configurations. In particular, for unidirectional coupling, locally (microscopically) synchronization transition occurs in a very narrow range of coupling strength but for a global one (macroscopically) it occurs sequentially in a broad range of coupling strength preceded by an intermittent synchronization. On the other hand, in the case of mutual coupling a very large value of coupling strength is required for local synchronization and, consequently, all the local subsystems synchronize immediately for the same value of the coupling strength and hence globally synchronization also occurs in a narrow range of the coupling strength. In the transition regime, we observe a new type of synchronization transition where long intervals of high quality synchronization which are interrupted at irregular times by intermittent chaotic bursts simultaneously in all the systems, which we designate as global intermittent synchronization (GIS). We also relate our synchronization transition results to the above specific types using unstable periodic orbit theory. The above studies are carried out in a well known piecewise linear time-delay system.

  15. Proposed second harmonic acceleration system for the intense pulsed neutron source rapid cycling synchrotron

    SciTech Connect (OSTI)

    Norem, J.; Brandeberry, F.; Rauchas, A.

    1983-01-01T23:59:59.000Z

    The Rapid Cycling Synchrotron (RCS) of the Intense Pulsed Neutron Source (IPNS) operating at Argonne National Laboratory is presently producing intensities of 2 to 2.5 x 10/sup 12/ protons per pulse (ppp) with the addition of a new ion source. This intensity is close to the space charge limit of the machine, estimated at approx.3 x 10/sup 12/ ppp, depending somewhat on the available aperture. With the present good performance in mind, accelerator improvements are being directed at: (1) increasing beam intensities for neutron science; (2) lowering acceleration losses to minimize activation; and (3) gaining better control of the beam so that losses can be made to occur when and where they can be most easily controlled. On the basis of preliminary measurements, we are now proposing a third cavity for the RF systems which would provide control of the longitudinal bunch shape during the cycle which would permit raising the effective space charge limit of the accelerator and reducing losses.

  16. Toward tsunami early warning system in Indonesia by using rapid rupture durations estimation

    SciTech Connect (OSTI)

    Madlazim [Physics Department, Faculty Mathematics and Sciences of Surabaya State University (UNESA) Jl. Ketintang, Surabaya 60231 (Indonesia)

    2012-06-20T23:59:59.000Z

    Indonesia has Indonesian Tsunami Early Warning System (Ina-TEWS) since 2008. The Ina-TEWS has used automatic processing on hypocenter; Mwp, Mw (mB) and Mj. If earthquake occurred in Ocean, depth < 70 km and magnitude > 7, then Ina-TEWS announce early warning that the earthquake can generate tsunami. However, the announcement of the Ina-TEWS is still not accuracy. Purposes of this research are to estimate earthquake rupture duration of large Indonesia earthquakes that occurred in Indian Ocean, Java, Timor sea, Banda sea, Arafura sea and Pasific ocean. We analyzed at least 330 vertical seismogram recorded by IRIS-DMC network using a direct procedure for rapid assessment of earthquake tsunami potential using simple measures on P-wave vertical seismograms on the velocity records, and the likelihood that the high-frequency, apparent rupture duration, T{sub dur}. T{sub dur} can be related to the critical parameters rupture length (L), depth (z), and shear modulus ({mu}) while T{sub dur} may be related to wide (W), slip (D), z or {mu}. Our analysis shows that the rupture duration has a stronger influence to generate tsunami than Mw and depth. The rupture duration gives more information on tsunami impact, Mo/{mu}, depth and size than Mw and other currently used discriminants. We show more information which known from the rupture durations. The longer rupture duration, the shallower source of the earthquake. For rupture duration greater than 50 s, the depth less than 50 km, Mw greater than 7, the longer rupture length, because T{sub dur} is proportional L and greater Mo/{mu}. Because Mo/{mu} is proportional L. So, with rupture duration information can be known information of the four parameters. We also suggest that tsunami potential is not directly related to the faulting type of source and for events that have rupture duration greater than 50 s, the earthquakes generated tsunami. With available real-time seismogram data, rapid calculation, rupture duration discriminant can be completed within 4-5 min after an earthquake occurs and thus can aid in effective, accuracy and reliable tsunami early warning for Indonesia region.

  17. Multistability and transition to chaos in the degenerate Hamiltonian system with weak nonlinear dissipative perturbation

    E-Print Network [OSTI]

    E. V. Felk; A. P. Kuznetsov; A. V. Savin

    2013-11-13T23:59:59.000Z

    The effect of small nonlinear dissipation on the dynamics of system with stochastic web which is linear oscillator driven by pulses is studied. The scenario of coexisting attractors evolution with the increase of nonlinear dissipation is revealed. It is shown that the period-doubling transition to chaos is possible only for third order resonance and only hard transitions can be seen for all other resonances.

  18. Development of a semi-automated ZLC system for rapid screening of adsorbents for carbon capture 

    E-Print Network [OSTI]

    Hu, Xiayi

    2012-06-25T23:59:59.000Z

    In this dissertation a novel ZLC setup has been developed as part of a DOE-funded grant in collaboration with UOP, to provide rapid screening of novel adsorbent materials for carbon capture (CC). The key features of the ...

  19. M-DWARF RAPID ROTATORS AND THE DETECTION OF RELATIVELY YOUNG MULTIPLE M-STAR SYSTEMS

    E-Print Network [OSTI]

    Swift, J.

    We have searched the Kepler light curves of ~3900 M-star targets for evidence of periodicities that indicate, by means of the effects of starspots, rapid stellar rotation. Several analysis techniques, including Fourier ...

  20. A functional central limit theorem for interacting particle systems on transitive graphs

    E-Print Network [OSTI]

    Paul Doukhan; Gabriel Lang; Sana Louhichi; Bernard Ycart

    2007-04-12T23:59:59.000Z

    A finite range interacting particle system on a transitive graph is considered. Assuming that the dynamics and the initial measure are invariant, the normalized empirical distribution process converges in distribution to a centered diffusion process. As an application, a central limit theorem for certain hitting times, interpreted as failure times of a coherent system in reliability, is derived.

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

    Open Energy Info (EERE)

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

  2. Transition to cloud computing in healthcare information systems

    E-Print Network [OSTI]

    Ren, Haiying, S.M. Massachusetts Institute of Technology

    2012-01-01T23:59:59.000Z

    This thesis is a study on the adoption of cloud computing in healthcare information technology industry. It provides a guideline for people who are trying to bring cloud computing into healthcare information systems through ...

  3. Numerical studies of the melting transition in 2D Yukawa systems

    SciTech Connect (OSTI)

    Hartmann, P.; Donko, Z. [Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 49 (Hungary); Kalman, G. J. [Department of Physics, Boston College, Chestnut Hill, MA 02467 (United States)

    2008-09-07T23:59:59.000Z

    We present the latest results of our systematic studies of the solid--liquid phase transition in 2D classical many-particle systems interacting with the Yukawa potential. Our previous work is extended by applying the molecular dynamic simulations to systems with up to 1.6 million particles in the computational box (for {kappa} = 2 case). Equilibrium simulations are performed for different coupling parameters in the vicinity of the expected melting transition ({gamma}{sub m}{sup {kappa}}{sup ={sup 2}}{approx_equal}415) and a wide range of observables are averaged over uncorrelated samples of the micro-canonical ensemble generated by the simulations.

  4. Using System Dynamics to Model the Transition to Biofuels in the United States: Preprint

    SciTech Connect (OSTI)

    Bush, B.; Duffy, M.; Sandor, D.; Peterson, S.

    2008-06-01T23:59:59.000Z

    Transitioning to a biofuels industry that is expected to displace about 30% of current U.S. gasoline consumption requires a robust biomass-to-biofuels system-of-systems that operates in concert with the existing markets. This paper discusses employing a system dynamics approach to investigate potential market penetration scenarios for cellulosic ethanol and to help government decision makers focus on areas with greatest potential.

  5. THE HOMOGENEOUS STUDY OF TRANSITING SYSTEMS (HoSTS). I. THE PILOT STUDY OF WASP-13

    SciTech Connect (OSTI)

    Gomez Maqueo Chew, Yilen; Cargile, Phillip; Hebb, Leslie; Stassun, Keivan G. [Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235 (United States); Faedi, Francesca; Pollacco, Don [Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Doyle, Amanda P.; Smalley, Barry [Astrophysics Group, Keele University, Staffordshire ST5 5BG (United Kingdom); Ghezzi, Luan; Cunha, Katia; Smith, Verne V. [Observatorio Nacional, Rua Gal. Jose Cristino 77, Rio de Janeiro, RJ 20921-400 (Brazil); Sousa, Sergio; Santos, Nuno C. [Centro de Astrofisica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto (Portugal); Barros, Susana C. C. [LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, Aix Marseille Universite, CNRS, F-13388 Marseille (France); Schuler, Simon C. [Stewart Observatory, University of Arizona, Tucson, AZ 85721 (United States); Collier Cameron, Andrew, E-mail: yilen.gomez@vanderbilt.edu [School of Physics and Astronomy, University of St Andrews, St Andrews, Fife KY16 9SS (United Kingdom)

    2013-05-01T23:59:59.000Z

    We present the fundamental stellar and planetary properties of the transiting planetary system WASP-13 within the framework of the Homogeneous Study of Transiting Systems (HoSTS). HoSTS aims to derive the fundamental stellar (T{sub eff}, [Fe/H], M{sub *}, R{sub *}) and planetary (M{sub pl}, R{sub pl}, T{sub eq}) physical properties of known transiting planets using a consistent methodology and homogeneous high-quality data set. Four spectral analysis techniques are independently applied to a Keck+HIRES spectrum of WASP-13 considering two distinct cases: unconstrained parameters and constrained log g from transit light curves. We check the derived stellar temperature against that from a different temperature diagnostic based on an INT+IDS H{alpha} spectrum. The four unconstrained analyses render results that are in good agreement, and provide an improvement of 50% in the precision of T{sub eff}, and of 85% in [Fe/H] with respect to the WASP-13 discovery paper. The planetary parameters are then derived via the Monte Carlo Markov Chain modeling of the radial velocity and light curves, in iteration with stellar evolutionary models to derive realistic uncertainties. WASP-13 (1.187 {+-} 0.065 M{sub Sun }; 1.574 {+-} 0.048 R{sub Sun }) hosts a Saturn-mass, transiting planet (0.500 {+-} 0.037 M{sub Jup}; 1.407 {+-} 0.052 R{sub Jup}), and is at the end of its main-sequence lifetime (4-5.5 Gyr). Our analysis of WASP-13 showcases that both a detailed stellar characterization and transit modeling are necessary to well determine the fundamental properties of planetary systems, which are paramount in identifying and determining empirical relationships between transiting planets and their hosts.

  6. Clean air. Safe, congestion-free highways and transit systems.

    E-Print Network [OSTI]

    Pennycook, Steve

    and weight, and increase safety and reliability of next-generation hybrid, battery-powered, and fuel cell. Through materials characterization, processing, and systems simulations, lab experts are developing next-generation batteries and manufacturing processes. ORNL is also addressing the bioenergy supply chain to enable large

  7. SEARCHING FOR TRANSITING PLANETS IN STELLAR SYSTEMS Joshua Pepper1

    E-Print Network [OSTI]

    Gaudi, B. Scott

    will detect as a function of the parameters of the system (age, extinction, distance, richness, mass function), the observational setup (nights observed, bandpass, exposure time, telescope diameter, detector characteristics dependent on the mass of the primary for sources with flux above the sky background and falls very sharply

  8. HybriDrive Propulsion System Cleaner, smarter power for transit

    E-Print Network [OSTI]

    to Full Commercialization of Fuel Cell Buses #12;Well-to-Wheels Efficiency 6 · Battery EV is best at 40 Vehicle Energy Storage System (ESS) Storage and Extraction 0.95 * 0.95 = 0.9R-4 Bffng 10.7% Bffc 5.9% Bze (H2) and Compression 0.65 * 0.9 = 0.59R-6 H2 Transportation and Storage 0.9R-7 H2 Delivery to Vehicle

  9. RAPID for high-performance computing systems: architecture and performance evaluation

    E-Print Network [OSTI]

    Louri, Ahmed

    Karanth Kodi and Ahmed Louri The limited bandwidth and the increase in power dissipation at longer power consump- tion, and enhances scalability. We also present two cost-effective design alternatives RAPID architecture and compare it to several electrical HPCS interconnects. Based on the performance

  10. Rapid Deployment Drilling System for on-site inspections under a Comprehensive Test Ban Preliminary Engineering Design

    SciTech Connect (OSTI)

    Maurer, W.C.; Deskins, W.G.; McDonald, W.J.; Cohen, J.H. [Maurer Engineering, Inc., Houston, TX (United States); Heuze, F.E.; Butler, M.W. [Lawrence Livermore National Lab., CA (United States)

    1996-09-01T23:59:59.000Z

    While not a new drilling technology, coiled-tubing (CT) drilling continues to undergo rapid development and expansion, with new equipment, tools and procedures developed almost daily. This project was undertaken to: analyze available technological options for a Rapid Deployment Drilling System (RDDS) CT drilling system: recommend specific technologies that best match the requirements for the RDDS; and highlight any areas where adequate technological solutions are not currently available. Postshot drilling is a well established technique at the Nevada Test Site (NTS). Drilling provides essential data on the results of underground tests including obtaining samples for the shot zone, information on cavity size, chimney dimensions, effects of the event on surrounding material, and distribution of radioactivity.

  11. Fluid-Insulator transitions in a system of interacting Bose gas in 1D disordered lattices

    E-Print Network [OSTI]

    Shyamasundar, R.K.

    Fluid-Insulator transitions in a system of interacting Bose gas in 1D disordered lattices insulator, Ander In this seminar, I shall discuss about our recent experimental results where we investigate strengths for which such critical momentum vanishes separating a fluid regime from an insulating one

  12. Vehicle Sharing System Pricing Regulation: Transit Optimization of Intractable Queuing Network

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Vehicle Sharing System Pricing Regulation: Transit Optimization of Intractable Queuing Network. 1 Introduction 1.1 Context Shoup (2005) reports that, based on a sample of 22 US studies, car drivers looking for a parking spot contribute to 30% of the city traffic. Moreover cars are used less than

  13. Transition from anticipatory to lag synchronization via complete synchronization in time-delay systems

    E-Print Network [OSTI]

    D. V. Senthilkumar; M. Lakshmanan

    2005-10-13T23:59:59.000Z

    The existence of anticipatory, complete and lag synchronization in a single system having two different time-delays, that is feedback delay $\\tau_1$ and coupling delay $\\tau_2$, is identified. The transition from anticipatory to complete synchronization and from complete to lag synchronization as a function of coupling delay $\\tau_2$ with suitable stability condition is discussed. The existence of anticipatory and lag synchronization is characterized both by the minimum of similarity function and the transition from on-off intermittency to periodic structure in laminar phase distribution.

  14. Transition from phase to generalized synchronization in time-delay systems

    E-Print Network [OSTI]

    D. V. Senthilkumar; M. Lakshmanan; J. Kurths

    2008-04-21T23:59:59.000Z

    The notion of phase synchronization in time-delay systems, exhibiting highly non-phase-coherent attractors, has not been realized yet even though it has been well studied in chaotic dynamical systems without delay. We report the identification of phase synchronization in coupled nonidentical piece-wise linear and in coupled Mackey-Glass time-delay systems with highly non-phase-coherent regimes. We show that there is a transition from non-synchronized behavior to phase and then to generalized synchronization as a function of coupling strength. We have introduced a transformation to capture the phase of the non-phase coherent attractors, which works equally well for both the time-delay systems. The instantaneous phases of the above coupled systems calculated from the transformed attractors satisfy both the phase and mean frequency locking conditions. These transitions are also characterized in terms of recurrence based indices, namely generalized autocorrelation function $P(t)$, correlation of probability of recurrence (CPR), joint probability of recurrence (JPR) and similarity of probability of recurrence (SPR). We have quantified the different synchronization regimes in terms of these indices. The existence of phase synchronization is also characterized by typical transitions in the Lyapunov exponents of the coupled time-delay systems.

  15. 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...

  16. Transit Timing Observations from Kepler: IV. Confirmation of 4 Multiple Planet Systems by Simple Physical Models

    SciTech Connect (OSTI)

    Fabrycky, Daniel C.; /UC, Santa Cruz; Ford, Eric B.; /Florida U.; Steffen, Jason H.; /Fermilab; Rowe, Jason F.; /SETI Inst., Mtn. View /NASA, Ames; Carter, Joshua A.; /Harvard-Smithsonian Ctr. Astrophys.; Moorhead, Althea V.; /Florida U.; Batalha, Natalie M.; /San Jose State U.; Borucki, William J.; /NASA, Ames; Bryson, Steve; /NASA, Ames; Buchhave, Lars A.; /Bohr Inst. /Copenhagen U.; Christiansen, Jessie L.; /SETI Inst., Mtn. View /NASA, Ames /Caltech

    2012-01-01T23:59:59.000Z

    Eighty planetary systems of two or more planets are known to orbit stars other than the Sun. For most, the data can be sufficiently explained by non-interacting Keplerian orbits, so the dynamical interactions of these systems have not been observed. Here we present 4 sets of lightcurves from the Kepler spacecraft, which each show multiple planets transiting the same star. Departure of the timing of these transits from strict periodicity indicates the planets are perturbing each other: the observed timing variations match the forcing frequency of the other planet. This confirms that these objects are in the same system. Next we limit their masses to the planetary regime by requiring the system remain stable for astronomical timescales. Finally, we report dynamical fits to the transit times, yielding possible values for the planets masses and eccentricities. As the timespan of timing data increases, dynamical fits may allow detailed constraints on the systems architectures, even in cases for which high-precision Doppler follow-up is impractical.

  17. Punjabi families in transition: an intergenerational study of fertility and family change 

    E-Print Network [OSTI]

    Bhatti, Feyza

    2014-07-01T23:59:59.000Z

    Pakistan, a late starter in fertility transition, has been experiencing a rapid fertility decline since 1990. Although existing research often presents patriarchal family systems as a major reason for the delay of the ...

  18. Development of a System for Rapid Detection of Contaminants in Water Supplies Using Magnetic Resonance and Nanoparticles

    SciTech Connect (OSTI)

    Lowery, Thomas J; Neely, Lori; Chepin, James; Wellman, Parris; Toso, Ken; Murray, Paul; Audeh, Mark; Demas, Vasiliki; Palazzolo, Robert; Min, Michael; Phung, Nu; Blanco, Matt; Raphel, Jordan; O'Neil, Troy

    2010-09-14T23:59:59.000Z

    To keep the water supply safe and to ensure a swift and accurate response to a water supply contamination event, rapid and robust methods for microbial testing are necessary. Current technologies are complex, lengthy and costly and there is a need for rapid, reliable, and precise approaches that can readily address this fundamental security and safety issue. T2 Biosystems is focused on providing solutions to this problem by making breakthroughs in nanotechnology and biosensor techniques that address the current technical restrictions facing rapid, molecular analysis in complex samples. In order to apply the T2 Biosystems nucleic acid detection procedure to the analysis of nucleic acid targets in unprocessed water samples, Bacillus thuringeinsis was selected as a model organism and local river water was selected as the sample matrix. The initial assay reagent formulation was conceived with a manual magnetic resonance reader, was optimized using a high throughput system, and transferred back to the MR reader for potential field use. The final assay employing the designed and manufactured instruments was capable of detecting 10 CFU/mL of B. thuringiensis directly within the environmental water sample within 90 minutes. Further, discrimination of two closely related species of Bacilli was accomplished using the methods of this project; greater than 3-fold discrimination between B. cereus and B. thuringiensis at a concentrations spanning 10 CFU/mL to 10{sup 5} CFU/mL was observed.

  19. Elliptic flow and system size dependence of transition energies at intermediate energies

    E-Print Network [OSTI]

    Yingxun Zhang; Zhuxia Li

    2006-06-02T23:59:59.000Z

    The elliptic flow for $Z\\le2$ particles in heavy ion collisions at energies from several tens to several hundreds MeV per nucleon is investigated by means of transport model,i.e. a new version of the Improved Quantum Molecular Dynamics model (ImQMD05). In this model, a complete Skyrme potential energy density functional is employed. The influence of different effective interactions and medium corrections of nucleon-nucleon cross sections on the elliptic flow are studied. Our results show that a soft nuclear equation of state and incident energy dependent in-medium nucleon-nucleon cross sections are required for describing the excitation function of the elliptic flow at intermediate energies. The size dependence of transition energies for the elliptic flow at intermediate energies is also studied. The system size dependence of transition energies fits a power of system size with a exponent of 0.223.

  20. A compact ultranarrow high-power laser system for experiments with 578nm Ytterbium clock transition

    E-Print Network [OSTI]

    Cappellini, Giacomo; Mancini, Marco; Pagano, Guido; Pizzocaro, Marco; Fallani, Leonardo; Catani, Jacopo

    2015-01-01T23:59:59.000Z

    In this paper we present the realization of a compact, high-power laser system able to excite the Ytterbium clock transition at 578 nm. Starting from an external-cavity laser based on a quantum dot chip at 1156 nm with an intra-cavity electro-optic modulator, we were able to obtain up to 60 mW of visible light at 578 nm via frequency doubling. The laser is locked with a 500 kHz bandwidth to a ultra-low-expansion glass cavity stabilized at its zero coefficient of thermal expansion temperature through an original thermal insulation and correction system. This laser allowed the observation of the clock transition in fermionic $^{173}$Yb with a < 50 Hz linewidth over 5 minutes, limited only by a residual frequency drift of some 0.1 Hz/s.

  1. A Rapidly Deployable Manipulator System Christiaan J.J. Paredis, H. Benjamin Brown, Pradeep K. Khosla

    E-Print Network [OSTI]

    ­Mechanical System Design Engineering Chimera RTOS Onika VPL Building of Sensor­Based Control Software Figure 1 components, as is supported by the Chimera real­time operating system [15], with a graphical user interface

  2. Global implications of Rapid: an international system facilitating inexpensive resource sharing

    E-Print Network [OSTI]

    Leon, Lars

    2008-09-29T23:59:59.000Z

    of the system vendor. International implications including copyright, ability to interact with various types of interlibrary loan managing systems, scanning and human interactions will be reviewed. This paper will conclude with an assessment to whether a...

  3. STI: Flexible Wireless Systems for Rapid Network Evolution--Final Report

    E-Print Network [OSTI]

    Kansas, University of

    of Commerce, and the Federal Communications Commission (FCC). NTIA allocates spectrum to government Evolution Final Report 1 Introduction Ultra-wideband (UWB) systems portend to offer multiple communications-ranged communications system can be achieved. However, traditional UWB systems have only two degrees of freedom, pulse

  4. Absorbing Phase Transitions and Dynamic Freezing in Running Active Matter Systems

    E-Print Network [OSTI]

    C. Reichhardt; C. J. Olson Reichhardt

    2014-06-12T23:59:59.000Z

    We examine a two-dimensional system of sterically repulsive interacting disks where each particle runs in a random direction. This system is equivalent to a run-and-tumble dynamics system in the limit where the run time is infinite. At low densities, we find a strongly fluctuating state composed of transient clusters. Above a critical density that is well below the density at which non-active particles would crystallize, the system can organize into a drifting quiescent or frozen state where the fluctuations are lost and large crystallites form surrounded by a small density of individual particles. Although all the particles are still moving, their paths form closed orbits. The average transient time to organize into the quiescent state diverges as a power law upon approaching the critical density from above. We compare our results to the random organization observed for periodically sheared systems that can undergo an absorbing transition from a fluctuating state to a dynamical non-fluctuating state. In the random organization studies, the system organizes to a state in which the particles no longer interact; in contrast, we find that the randomly running active matter organizes to a strongly interacting dynamically jammed state. We show that the transition to the frozen state is robust against a certain range of stochastic fluctuations. We also examine the effects of adding a small number of pinned particles to the system and find that the transition to the frozen state shifts to significantly lower densities and arises via the nucleation of faceted crystals centered at the obstacles.

  5. New insight into the Solar System's transition disk phase provided by the unusual meteorite Isheyevo

    E-Print Network [OSTI]

    Morris, Melissa A; Knauth, L Paul

    2014-01-01T23:59:59.000Z

    Many aspects of planet formation are controlled by the amount of gas remaining in the natal protoplanetary disk (PPDs). Infrared observations show that PPDs undergo a transition stage at several Myr, during which gas densities are reduced. Our Solar System would have experienced such a stage. However, there is currently no data that provides insight into this crucial time in our PPD's evolution. We show that the Isheyevo meteorite contains the first definitive evidence for a transition disk stage in our Solar System. Isheyevo belongs to a class of metal-rich meteorites whose components have been dated at almost 5 Myr after the first solids in the Solar System, and exhibits unique sedimentary layers that imply formation through gentle sedimentation. We show that such layering can occur via gentle sweep-up of material found in the impact plume resulting from the collision of two planetesimals. Such sweep-up requires gas densities consistent with observed transition disks. As such, Isheyevo presents the first ev...

  6. Phase transitions in self-gravitating systems. Self-gravitating fermions and hard spheres models

    E-Print Network [OSTI]

    P. H. Chavanis

    2002-01-28T23:59:59.000Z

    We discuss the nature of phase transitions in self-gravitating systems both in the microcanonical and in the canonical ensemble. We avoid the divergence of the gravitational potential at short distances by considering the case of self-gravitating fermions and hard spheres models. Three kinds of phase transitions (of zeroth, first and second order) are evidenced. They separate a ``gaseous'' phase with a smoothly varying distribution of matter from a ``condensed'' phase with a core-halo structure. We propose a simple analytical model to describe these phase transitions. We determine the value of energy (in the microcanonical ensemble) and temperature (in the canonical ensemble) at the transition point and we study their dependance with the degeneracy parameter (for fermions) or with the size of the particles (for a hard spheres gas). Scaling laws are obtained analytically in the asymptotic limit of a small short distance cut-off. Our analytical model captures the essential physics of the problem and compares remarkably well with the full numerical solutions.

  7. Multi-vehicle Mobility Allowance Shuttle Transit (MAST) System - An Analytical Model to Select the Fleet Size and a Scheduling Heuristic 

    E-Print Network [OSTI]

    Lu, Wei

    2012-10-19T23:59:59.000Z

    The mobility allowance shuttle transit (MAST) system is a hybrid transit system in which vehicles are allowed to deviate from a fixed route to serve flexible demand. A mixed integer programming (MIP) formulation for the static scheduling problem...

  8. Multi-vehicle Mobility Allowance Shuttle Transit (MAST) System - An Analytical Model to Select the Fleet Size and a Scheduling Heuristic

    E-Print Network [OSTI]

    Lu, Wei

    2012-10-19T23:59:59.000Z

    The mobility allowance shuttle transit (MAST) system is a hybrid transit system in which vehicles are allowed to deviate from a fixed route to serve flexible demand. A mixed integer programming (MIP) formulation for the static scheduling problem...

  9. Heating-Induced Micelle to Vesicle Transition in the Cationic-Anionic Surfactant Systems: Comprehensive Study and Understanding

    E-Print Network [OSTI]

    Huang, Jianbin

    Heating-Induced Micelle to Vesicle Transition in the Cationic-Anionic Surfactant Systems, 2004; In Final Form: January 6, 2005 Heating-induced micelle to vesicle transition (MVT), which has classes: Class A and B. Heating-induced MVT was observed in Class A at certain total surfactant

  10. Sub-Doppler Spectra of Infrared Hyperfine Transitions of Nitric Oxide Using a Pulse Modulated Quantum Cascade Laser: Rapid Passage, Free Induction Decay and the AC Stark Effect

    SciTech Connect (OSTI)

    Duxbury, Geoffrey; Kelly, James F.; Blake, Thomas A.; Langford, Nigel

    2012-05-07T23:59:59.000Z

    Using a low power, rapid (nsec) pulse-modulated quantum cascade (QC) laser, collective coherent effects in the 5 {micro}m spectrum of nitric oxide have been demonstrated by the observation of sub-Doppler hyperfine splitting and also Autler-Townes splitting of Doppler broadened lines. For nitrous oxide, experiments and model calculations have demonstrated that two main effects occur with ulsemodulated (chirped) quantum cascade lasers: free induction decay signals, and signals induced by rapid passage during the laser chirp. In the open shell molecule, NO, in which both {Lambda}-doubling splitting and hyperfine structure occur, laser field-induced coupling between the hyperfine levels of the two {Lambda}-doublet components can induce a large AC Stark effect. This may be observed as sub-Doppler structure, field-induced splittings, or Autler-Townes splitting of a Doppler broadened line. These represent an extension of the types of behaviour observed in the closed shell molecule nitrous oxide, using the same apparatus, when probed with an 8 {micro}m QC laser.

  11. Weak chaos and the 'melting transition' in a confined microplasma system

    SciTech Connect (OSTI)

    Antonopoulos, Chris; Basios, Vasileios [Interdisciplinary Center for Nonlinear Phenomena and Complex Systems (CeNoLi), Service de Physique des Systemes Complexes et Mecanique Statistique, Universite Libre de Bruxelles, 1050 Brussels (Belgium); Bountis, Tassos [Center for Research and Applications of Nonlinear Systems (CRANS), Department of Mathematics, University of Patras, 26500 Patras (Greece)

    2010-01-15T23:59:59.000Z

    We present results demonstrating the occurrence of changes in the collective dynamics of a Hamiltonian system which describes a confined microplasma characterized by long-range Coulomb interactions. In its lower energy regime, we first detect macroscopically the transition from a 'crystallinelike' to a 'liquidlike' behavior, which we call the 'melting transition'. We then proceed to study this transition using a microscopic chaos indicator called the smaller alignment index (SALI), which utilizes two deviation vectors in the tangent dynamics of the flow and is nearly constant for ordered (quasiperiodic) orbits, while it decays exponentially to zero for chaotic orbits as exp[-(lambda{sub 1}-lambda{sub 2})t], where lambda{sub 1}>lambda{sub 2}>0 are the two largest Lyapunov exponents. During the melting phase, SALI exhibits a peculiar stairlike decay to zero, reminiscent of 'sticky' orbits of Hamiltonian systems near the boundaries of resonance islands. This alerts us to the importance of the DELTAlambda=lambda{sub 1}-lambda{sub 2} variations in that regime and helps us identify the energy range over which 'melting' occurs as a multistage diffusion process through weakly chaotic layers in the phase space of the microplasma. Additional evidence supporting further the above findings is given by examining the GALI{sub k} indices, which generalize SALI (=GALI{sub 2}) to the case of k>2 deviation vectors and depend on the complete spectrum of Lyapunov exponents of the tangent flow about the reference orbit.

  12. TONGUES: RAPID DEVELOPMENT OF A SPEECH-TO-SPEECH TRANSLATION SYSTEM Alan W Black

    E-Print Network [OSTI]

    Black, Alan W

    -to- speech translation system in a new language that could run on a small portable computer. Croatian reasons, Croatian was chosen as the target language. Although spoken by around 5 million people, it does

  13. Development of a Wireless Real-Time Productivity Measurement System for Rapid Construction Operations

    E-Print Network [OSTI]

    Kim, Seonghoon

    2008-01-01T23:59:59.000Z

    was developed. The WRITE System has a potential to strengthen communication and coordination among participants involved in the infrastructure construction process by providing more accurate productivity information in real time....

  14. Rapid development of a measurement and control system for the Advanced Free-Electron Laser

    SciTech Connect (OSTI)

    Wilson, W.L. Jr.; May, M.W.; Kozubal, A.J.

    1991-01-01T23:59:59.000Z

    The Experimental Physics and Industrial Control System (EPICS) is being used to develop a measurement and control system for the Advanced Free-Electron laser (AFEL) at the Los Alamos National Laboratory. EPICS is an integrated system of applications development tools and a distributed run time environment that supports an input-output database, a graphical operator interface, sequential control through state'' definition, data archiving, data analysis, and fault management. It is very advantageous in terms of both time and system integrity to be able to perform much of the control system development before the actual hardware for the AFEL is in place. Using the EPICS applications tools, we are developing prototype measurements and controls that can be directly transferred to the AFEL during installation and commissioning. This is possible due primarily to three aspects of EPICS. First we can easily model physical systems with the state notation language. Second, we can simulate input and output channels with soft'' database channels, which are created using the database configuration tool. Third, we can easily build and modify operator interface screens with the display editor. 8 refs., 3 figs.

  15. Infrastructure systems, such as buildings, schools, roads, bridges, water lines, sewage systems, communication systems, and power plants, are a fundamental part of daily life. Both rapid and gradual climate changes can affect

    E-Print Network [OSTI]

    and gradual climate changes can affect these systems and have significant impacts on society. Extreme weather infrastructure sector make practical decisions in order to adapt to climate changes and variations systems, communication systems, and power plants, are a fundamental part of daily life. Both rapid

  16. Technology transition in the national air transportation system : market failure and game theoretic analysis with application to ADS-B

    E-Print Network [OSTI]

    Hu, Xiaojie

    2008-01-01T23:59:59.000Z

    This research analyzes the problem of technology transition in the national air transportation system, focusing on the implementation of Automatic Dependent Surveillance-Broadcast (ADS-B). ADS-B is a key technology in the ...

  17. Transit of Venus: New Views of the Solar System and Galaxy Proceedings IAU Colloquium No. 196, 2004

    E-Print Network [OSTI]

    Transit of Venus: New Views of the Solar System and Galaxy Proceedings IAU Colloquium No. 196, 2004 to complement those, from the South Seas, by Green and Cook. Mason did not volunteer his services

  18. Transit of Venus: New Views of the Solar System and Galaxy Proceedings IAU Colloquium No. 196, 2004

    E-Print Network [OSTI]

    Transit of Venus: New Views of the Solar System and Galaxy Proceedings IAU Colloquium No. 196, 2004 and Cook. Mason did not volunteer his services on this occasion, possibly because of the rather o

  19. Development and Evaluation of An Adaptive Transit Signal Priority System Using Connected Vehicle Technology

    E-Print Network [OSTI]

    Zeng, Xiaosi

    2014-12-15T23:59:59.000Z

    Transit signal priority (TSP) can be a very effective preferential treatment for transit vehicles in congested urban networks. There are two problems with the current practice of the transit signal priority. First, random bus arrival time...

  20. Thermo-responsive viscoelastic wormlike micelle to elastic hydrogel transition in dual-component systems

    E-Print Network [OSTI]

    Huang, Jianbin

    Thermo-responsive viscoelastic wormlike micelle to elastic hydrogel transition in dual report a thermo-responsive phase transition from a viscoelastic wormlike micelle solution to an elastic

  1. Transit Timing Observations from Kepler: II. Confirmation of Two Multiplanet Systems via a Non-parametric Correlation Analysis

    SciTech Connect (OSTI)

    Ford, Eric B.; /Florida U.; Fabrycky, Daniel C.; /Lick Observ.; Steffen, Jason H.; /Fermilab; Carter, Joshua A.; /Harvard-Smithsonian Ctr. Astrophys.; Fressin, Francois; /Harvard-Smithsonian Ctr. Astrophys.; Holman, Matthew J.; /Harvard-Smithsonian Ctr. Astrophys.; Lissauer, Jack J.; /NASA, Ames; Moorhead, Althea V.; /Florida U.; Morehead, Robert C.; /Florida U.; Ragozzine, Darin; /Harvard-Smithsonian Ctr. Astrophys.; Rowe, Jason F.; /NASA, Ames /SETI Inst., Mtn. View /San Diego State U., Astron. Dept.

    2012-01-01T23:59:59.000Z

    We present a new method for confirming transiting planets based on the combination of transit timing variations (TTVs) and dynamical stability. Correlated TTVs provide evidence that the pair of bodies are in the same physical system. Orbital stability provides upper limits for the masses of the transiting companions that are in the planetary regime. This paper describes a non-parametric technique for quantifying the statistical significance of TTVs based on the correlation of two TTV data sets. We apply this method to an analysis of the transit timing variations of two stars with multiple transiting planet candidates identified by Kepler. We confirm four transiting planets in two multiple planet systems based on their TTVs and the constraints imposed by dynamical stability. An additional three candidates in these same systems are not confirmed as planets, but are likely to be validated as real planets once further observations and analyses are possible. If all were confirmed, these systems would be near 4:6:9 and 2:4:6:9 period commensurabilities. Our results demonstrate that TTVs provide a powerful tool for confirming transiting planets, including low-mass planets and planets around faint stars for which Doppler follow-up is not practical with existing facilities. Continued Kepler observations will dramatically improve the constraints on the planet masses and orbits and provide sensitivity for detecting additional non-transiting planets. If Kepler observations were extended to eight years, then a similar analysis could likely confirm systems with multiple closely spaced, small transiting planets in or near the habitable zone of solar-type stars.

  2. Transition from stable orbit to chaotic dynamics in hybrid systems of Filippov type with digital sampling

    E-Print Network [OSTI]

    Paul Glendinning; Piotr Kowalczyk

    2009-01-20T23:59:59.000Z

    We demonstrate on a representative example of a planar hybrid system with digital sampling a sudden transition from a stable limit cycle to the onset of chaotic dynamics. We show that the scaling law in the size of the attractor is proportional to the digital sampling time $\\tau$ for sufficiently small values of $\\tau.$ Numerical and analytical results are given. The scaling law changes to a nonlinear law for large values of the sampling time $\\tau.$ This phenomenon is explained by the change in the boundedness of the attractor.

  3. Using System Dynamics to Model the Transition to Biofuels in the United States

    SciTech Connect (OSTI)

    Bush, B.; Duffy, M.; Sandor, D.; Peterson, S.

    2008-01-01T23:59:59.000Z

    Today, the U.S. consumes almost 21 million barrels of crude oil per day; approximately 60% of the U.S. demand is supplied by imports. The transportation sector alone accounts for two-thirds of U.S. petroleum use. Biofuels, liquid fuels produced from domestically-grown biomass, have the potential to displace about 30% of current U.S. gasoline consumption. Transitioning to a biofuels industry on this scale will require the creation of a robust biomass-to-biofuels system-of-systems that operates in concert with the existing agriculture, forestry, energy, and transportation markets. The U.S. Department of Energy is employing a system dynamics approach to investigate potential market penetration scenarios for cellulosic ethanol, and to aid decision makers in focusing government actions on the areas with greatest potential to accelerate the deployment of biofuels and ultimately reduce the nationpsilas dependence on imported oil.

  4. Rapid solidification processing system for producing molds, dies and related tooling

    DOE Patents [OSTI]

    McHugh, Kevin M.

    2004-06-08T23:59:59.000Z

    A system for the spray forming manufacturing of near-net-shape molds, dies and related toolings, wherein liquid material such as molten metal, metallic alloys, or polymers are atomized into fine droplets by a high temperature, high velocity gas and deposited onto a pattern. Quenching of the in-flight atomized droplets provides a heat sink, thereby allowing undercooled and partially solidified droplets to be formed in-flight. Composites can be formed by combining the atomized droplets with solid particles such as powders, whiskers or fibers.

  5. RAPID/Best Practices/Online Permitting Systems | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I GeothermalPotentialBiopowerSolidGenerationMethod JumpGeorgia: EnergyOnline Permitting Systems < RAPID‎

  6. Fluctuation properties of laser light after interaction with an atomic system: comparison between two-level and multilevel atomic transitions

    E-Print Network [OSTI]

    Lezama, A; Kastberg, A; Tanzilli, S; Kaiser, R

    2015-01-01T23:59:59.000Z

    The complex internal atomic structure involved in radiative transitions has an effect on the spectrum of fluctuations (noise) of the transmitted light. A degenerate transition has different properties in this respect than a pure two-level transition. We investigate these variations by studying a certain transition between two degenerate atomic levels for different choices of the polarization state of the driving laser. For circular polarization, corresponding to the textbook two-level atom case, the optical spectrum shows the characteristic Mollow triplet for strong laser drive, while the corresponding noise spectrum exhibits squeezing in some frequency ranges. For a linearly polarized drive, corresponding to the case of a multilevel system, additional features appear in both optical and noise spectra. These differences are more pronounced in the regime of a weakly driven transition: whereas the two-level case essentially exhibits elastic scattering, the multilevel case has extra noise terms related to sponta...

  7. System transition : dynamics of change in the US air transportation system

    E-Print Network [OSTI]

    Mozdzanowska, Aleksandra L. (Aleksandra Ludmila), 1979-

    2008-01-01T23:59:59.000Z

    The US Air Transportation System is currently facing a number of challenges including an increasing demand for travel and growing environmental requirements. In order to successfully meet future needs, the system will need ...

  8. TRANSIT TIMING OBSERVATIONS FROM KEPLER. II. CONFIRMATION OF TWO MULTIPLANET SYSTEMS VIA A NON-PARAMETRIC CORRELATION ANALYSIS

    SciTech Connect (OSTI)

    Ford, Eric B.; Moorhead, Althea V.; Morehead, Robert C. [Astronomy Department, University of Florida, 211 Bryant Space Sciences Center, Gainesville, FL 32611 (United States); Fabrycky, Daniel C. [UCO/Lick Observatory, University of California, Santa Cruz, CA 95064 (United States); Steffen, Jason H. [Fermilab Center for Particle Astrophysics, P.O. Box 500, MS 127, Batavia, IL 60510 (United States); Carter, Joshua A.; Fressin, Francois; Holman, Matthew J.; Ragozzine, Darin; Charbonneau, David [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Lissauer, Jack J.; Rowe, Jason F.; Borucki, William J.; Bryson, Stephen T.; Burke, Christopher J.; Caldwell, Douglas A. [NASA Ames Research Center, Moffett Field, CA 94035 (United States); Welsh, William F. [Astronomy Department, San Diego State University, San Diego, CA 92182-1221 (United States); Allen, Christopher [Orbital Sciences Corporation/NASA Ames Research Center, Moffett Field, CA 94035 (United States); Batalha, Natalie M. [Department of Physics and Astronomy, San Jose State University, San Jose, CA 95192 (United States); Buchhave, Lars A., E-mail: eford@astro.ufl.edu [Niels Bohr Institute, Copenhagen University, DK-2100 Copenhagen (Denmark); Collaboration: Kepler Science Team; and others

    2012-05-10T23:59:59.000Z

    We present a new method for confirming transiting planets based on the combination of transit timing variations (TTVs) and dynamical stability. Correlated TTVs provide evidence that the pair of bodies is in the same physical system. Orbital stability provides upper limits for the masses of the transiting companions that are in the planetary regime. This paper describes a non-parametric technique for quantifying the statistical significance of TTVs based on the correlation of two TTV data sets. We apply this method to an analysis of the TTVs of two stars with multiple transiting planet candidates identified by Kepler. We confirm four transiting planets in two multiple-planet systems based on their TTVs and the constraints imposed by dynamical stability. An additional three candidates in these same systems are not confirmed as planets, but are likely to be validated as real planets once further observations and analyses are possible. If all were confirmed, these systems would be near 4:6:9 and 2:4:6:9 period commensurabilities. Our results demonstrate that TTVs provide a powerful tool for confirming transiting planets, including low-mass planets and planets around faint stars for which Doppler follow-up is not practical with existing facilities. Continued Kepler observations will dramatically improve the constraints on the planet masses and orbits and provide sensitivity for detecting additional non-transiting planets. If Kepler observations were extended to eight years, then a similar analysis could likely confirm systems with multiple closely spaced, small transiting planets in or near the habitable zone of solar-type stars.

  9. Energy and System Size Dependence Study of the Percolation Phase Transition

    E-Print Network [OSTI]

    Terence Tarnowsky; Rolf Scharenberg; Brijesh Srivastava

    2007-02-26T23:59:59.000Z

    Multiparticle production at high energies is described in terms of color strings stretched between the projectile and target. As the string density increases, overlap in the transverse plane leads to cluster formation. At some critical density a macroscopic cluster appears, spanning the entire system. This marks the percolation phase transition. Data from $\\sqrt{s_{NN}}$ = 200 GeV p+p, d+Au and Au+Au collisions at RHIC has been analyzed using the STAR detector to obtain the percolation density parameter, $\\eta$. The particle p$_{T}$ spectrum from 200 GeV p+p data is parameterized using a power law. Values of the fit parameters are used in the d+Au and Au+Au analysis. For 200 GeV Au+Au collisions, the value of $\\eta$ is found to lie above the critical percolation threshold, while for other collision systems and energies, it is below the critical value. This supports the idea of string percolation, which at high enough string density is a possible mechanism to explore the hadronic phase transition to a quark-gluon plasma.

  10. Cooling system design tool for rapid development and analysis of chilled water systems aboard U.S. Navy surface ships

    E-Print Network [OSTI]

    Sanfiorenzo, Amiel B. (Amiel Benjamin)

    2013-01-01T23:59:59.000Z

    Over the last several decades, there has been a dramatic increase in the complexity and power requirements of radars and other combat systems equipment aboard naval combatants and this trend is expected to continue for the ...

  11. Correspondence between classical dynamics and energy level spacing distribution in the transition billiard systems

    E-Print Network [OSTI]

    Soo-Young Lee; Sunghwan Rim; Eui-Soon Yim; C. H. Lee

    1998-09-05T23:59:59.000Z

    The Robnik billiard is investigated in detail both classically and quantally in the transition range from integrable to almost chaotic system. We find out that a remarkable correspondence between characteristic features of classical dynamics, especially topological structure of integrable regions in the Poincar\\'{e} surface of section, and the statistics of energy level spacings appears with a system parameter $\\lambda$ being varied. It is shown that the variance of the level spacing distribution changes its behavior at every particular values of $\\lambda$ in such a way that classical dynamics changes its topological structure in the Poincar\\'{e} surface of section, while the skewness and the excess of the level spacings seem to be closely relevant to the interface structure between integrable region and chaotic sea rather than inner structure of intergrable regoin.

  12. Plasma power measurement and hysteresis in the E-H transition of a rf inductively coupled plasma system

    SciTech Connect (OSTI)

    Daltrini, A. M.; Moshkalev, S. A. [Universidade Estadual de Campinas, Unicamp, Center for Semiconductor Components, P.O. Box 6061, Campinas SP 13083-870 (Brazil); Morgan, T. J. [Department of Physics, Wesleyan University, Middletown, Connecticut 06457 (United States); Piejak, R. B.; Graham, W. G. [Centre for Plasma Physics, Department of Physics and Astronomy, Queen's University Belfast BT 7 1NN, Northern Ireland (United Kingdom)

    2008-02-11T23:59:59.000Z

    An experimental investigation of the argon plasma behavior near the E-H transition in an inductively coupled Gaseous Electronics Conference reference cell is reported. Electron density and temperature, ion density, argon metastable density, and optical emission measurements have been made as function of input power and gas pressure. When plotted versus plasma power, applied power corrected for coil and hardware losses, no hysteresis is observed in the measured plasma parameter dependence at the E-H mode transition. This suggests that hysteresis in the E-H mode transition is due to ignoring inherent power loss, primarily in the matching system.

  13. Bile Salt-Induced Vesicle-to-Micelle Transition in Catanionic Surfactant Systems: Steric and Electrostatic Interactions

    E-Print Network [OSTI]

    Huang, Jianbin

    Bile Salt-Induced Vesicle-to-Micelle Transition in Catanionic Surfactant Systems: Steric in catanionic surfactant systems by the addition of two kinds of bile salts, sodium cholate (SC) and sodium deoxycholate (SDC). It was found that steric interaction between the bile salt and catanionic surfactant plays

  14. Computational Studies of the Electronic Structures and Mechanisms of Late Transition Metal Systems 

    E-Print Network [OSTI]

    Pitts, Amanda

    2013-08-27T23:59:59.000Z

    Late transition metal species are heavily studied because of their diverse applications in industrial, synthetic, and biological processes. Transition metals can alter the thermodynamic aspects of a reaction by creating ...

  15. Rapid deployment shelter system

    DOE Patents [OSTI]

    Bzorgi, Fariborz M.

    2006-10-10T23:59:59.000Z

    A shelter for the protection of for the protection of persons, animals, equipment, materials, property, and similar things of value from potentially damaging environmental conditions is disclosed. Various embodiments include the use of a frame structure and hinged panels which are unfolded to create the walls of the structure. Optionally flexible surfaces may be added to the ends of the shelter to at least partially close the end of the shelter.

  16. Modelling and Verification of Automated Transit Systems, Using Timed Automata, Invariants and

    E-Print Network [OSTI]

    Lynch, Nancy

    and gates, steam boiler control) appear in [8, 10]. Briefly, a timed automaton is a labelled transition

  17. Electromagnetically induced transparency in a five-level {Lambda} system dominated by two-photon resonant transitions

    SciTech Connect (OSTI)

    Yan Dong [College of Physics, Jilin University, Changchun 130012 (China); School of Science, Changchun University, Changchun 130022 (China); Gao Jinwei; Bao Qianqian; Yang Hong; Wang Heng; Wu Jinhui [College of Physics, Jilin University, Changchun 130012 (China)

    2011-03-15T23:59:59.000Z

    We study the steady optical response of a five-level atomic system in the parametric region where resonant two-photon transitions are much stronger than far-detuned single-photon transitions. We find that the concurrent absorption of two weak probe fields can be well suppressed in a narrow spectral region to attain electromagnetically induced transparency (EIT) via quantum destructive interference between different two-photon transition pathways. To gain a deeper insight into relevant physics, we adiabatically reduce this five-level system with trivial single-photon transitions into a three-level system with vanishing single-photon transitions by deriving an effective Hamiltonian. The two systems have almost the same two-photon absorption spectra exhibiting typical EIT features but are a little different in fine details. This means that most characteristics of two-photon quantum destructive interference are reserved after the adiabatic elimination approximation. In addition, we verify by numerical calculations that the two-photon EIT spectra are insensitive to the dipole-dipole interaction of cold Rydberg atoms when the uppermost level has a high principle quantum number.

  18. Force induced conformational transition in a system of interacting stiff polymer: Application to unfolding

    E-Print Network [OSTI]

    Kumar, Sanjay

    2015-01-01T23:59:59.000Z

    We consider a stiff polymer chain in poor solvent and apply a force at one end of the chain. We find that by varying the stiffness parameter, polymer undergoes a transition from the globule state to the folded like state. The conformation of folded state mimics the $\\beta$-sheet as seen in titin molecule. Using exact enumeration technique, we study the extension-force and force-temperature diagrams of such a system. Force-temperature diagram shows the re-entrance behaviour for flexible chain. However, for stiff chain this re-entrance behaviour is absent and there is an enhancement in $\\theta$-temperature with the rise of stiffness. We further propose that the internal information about the frozen structure of polymer can be read from the distribution of end-to-end distance which shows saw-tooth like behaviour.

  19. Free-energy functional for freezing transitions: Hard sphere systems freezing into crystalline and amorphous structures

    E-Print Network [OSTI]

    Swarn Lata Singh; Atul S. Bharadwaj; Yashwant Singh

    2011-01-31T23:59:59.000Z

    A free-energy functional that contains both the symmetry conserved and symmetry broken parts of the direct pair correlation function has been used to investigate the freezing of a system of hard spheres into crystalline and amorphous structures. The freezing parameters for fluid-crystal transition have been found to be in very good agreement with the results found from simulations. We considered amorphous structures found from the molecular dynamics simulations at packing fractions $\\eta$ lower than the glass close packing fraction $\\eta_{J}$ and investigated their stability compared to that of a homogeneous fluid. The existence of free-energy minimum corresponding to a density distribution of overlapping Gaussians centered around an amorphous lattice depicts the deeply supercooled state with a heterogeneous density profile.

  20. Test-Bed of a Real Time Detection System for L/H & H/L Transitions Implemented with the ITMS Platform

    E-Print Network [OSTI]

    Test-Bed of a Real Time Detection System for L/H & H/L Transitions Implemented with the ITMS Platform

  1. A design tool architecture for the rapid evaluation of product design tradeoffs in an Inernet-based system modeling environment

    E-Print Network [OSTI]

    Wronski, Jacob (Jacob Andrzej)

    2005-01-01T23:59:59.000Z

    This thesis presents a computer-aided design tool for the rapid evaluation of design tradeoffs in an integrated product modeling environment. The goal of this work is to provide product development organizations with better ...

  2. Fluctuation properties of laser light after interaction with an atomic system: comparison between two-level and multilevel atomic transitions

    E-Print Network [OSTI]

    A. Lezama; R. Rebhi; A. Kastberg; S. Tanzilli; R. Kaiser

    2015-03-09T23:59:59.000Z

    The complex internal atomic structure involved in radiative transitions has an effect on the spectrum of fluctuations (noise) of the transmitted light. A degenerate transition has different properties in this respect than a pure two-level transition. We investigate these variations by studying a certain transition between two degenerate atomic levels for different choices of the polarization state of the driving laser. For circular polarization, corresponding to the textbook two-level atom case, the optical spectrum shows the characteristic Mollow triplet for strong laser drive, while the corresponding noise spectrum exhibits squeezing in some frequency ranges. For a linearly polarized drive, corresponding to the case of a multilevel system, additional features appear in both optical and noise spectra. These differences are more pronounced in the regime of a weakly driven transition: whereas the two-level case essentially exhibits elastic scattering, the multilevel case has extra noise terms related to spontaneous Raman transitions. We also discuss the possibility to experimentally observe these predicted differences for the commonly encountered case where the laser drive has excess noise in its phase quadrature.

  3. A model of phase transitions in the system of electro-optical dipolar chromophores subject to an electric field

    E-Print Network [OSTI]

    A model of phase transitions in the system of electro-optical dipolar chromophores subject to an electric field Yuriy V. Pereverzev, Oleg V. Prezhdo,a) and Larry R. Dalton Department of Chemistry An analytical model for the nonlinear behavior of the electro-optic EO coefficient in chro- mophore

  4. Reliability Engineering and System Safety 92 (2007) 609618 The nuclear industry's transition to risk-informed regulation and

    E-Print Network [OSTI]

    2007-01-01T23:59:59.000Z

    improvement in safety based on Institute of Nuclear Power Operations (INPO) performance indicatorsReliability Engineering and System Safety 92 (2007) 609­618 The nuclear industry's transition a Nuclear Science and Engineering Department, Massachusetts Institute of Technology, Cambridge, MA 02139

  5. Transition to Chaos in the Self-Excited System with a Cubic Double Well Potential and Parametric Forcing

    E-Print Network [OSTI]

    Grzegorz Litak; Marek Borowiec; Arkadiusz Syta; Kazimierz Szabelski

    2006-01-14T23:59:59.000Z

    We examine the Melnikov criterion for a global homoclinic bifurcation and a possible transition to chaos in case of a single degree of freedom nonlinear oscillator with a symmetric double well nonlinear potential. The system was subjected simultaneously to parametric periodic forcing and self excitation via negative damping term. Detailed numerical studies confirm the analytical predictions and show that transitions from regular to chaotic types of motion are often associated with increasing the energy of an oscillator and its escape from a single well.

  6. CaF[sub 2]-Si(111) as a model ionic-covalent system: Transition from chemisorption to epitaxy

    SciTech Connect (OSTI)

    Wong, G.C.L. (Materials Sciences Division, Center for Advanced Materials, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States) Department of Physics, University of California, Berkeley, California 94720 (United States)); Loretto, D. (Materials Sciences Division, Center for Advanced Materials, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)); Rotenberg, E. (Materials Sciences Division, Center for Advanced Materials, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States) Department of Physics, University of California, Berkeley, California 94720 (United States)); Olmstead, M.A. (Materials Sciences Division, Center for Advanced Materials, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States) Department of Physics, FM-15, University of Washington, Seattle, Washington 98195 (United States)); Lucas, C.A. (Materials Sciences Division, Center for Advanced Materials, Lawrence Berkeley Laboratory, Berkeley, Cal

    1993-08-15T23:59:59.000Z

    The demands of chemisorption and epitaxy are quite different for electronically dissimilar systems. The transition between these two regimes in CaF[sub 2]-Si(111) is studied with transmission-electron microscopy and photoemission. Changes in the electronic structure of the evolving growth surface are expressed in the composite growth mode, a Stranski-Krastanow pathway to layer-by-layer growth, which begins with CaF[sub 2] coherent island formation on a Si-CaF layer. After this transition, layer-by-layer CaF[sub 2] homoepitaxy is possible even at room temperature, and the critical thickness can be extended.

  7. An RNAi System in Physcomitrella patens with an Internal Marker for Silencing Allows for Rapid Identification of Loss of

    E-Print Network [OSTI]

    Quatrano, Ralph S.

    Identification of Loss of Function Phenotypes Magdalena Bezanilla, Pierre-François Perroud, Aihong Pan, Paul Louis, MO 63130 Running Head: Rapid RNAi in Moss Corresponding Author: Magdalena Bezanilla DepartmentRNA= ribosomal RNA #12;1 Abstract RNAi is a powerful method for generating loss of function mutants, especially

  8. TRANSIT TIMING OBSERVATIONS FROM KEPLER. IV. CONFIRMATION OF FOUR MULTIPLE-PLANET SYSTEMS BY SIMPLE PHYSICAL MODELS

    SciTech Connect (OSTI)

    Fabrycky, Daniel C. [Department of Astronomy and Astrophysics, University of California, Santa Cruz, Santa Cruz, CA 95064 (United States); Ford, Eric B.; Moorhead, Althea V. [Astronomy Department, University of Florida, 211 Bryant Space Sciences Center, Gainesville, FL 32111 (United States); Steffen, Jason H. [Fermilab Center for Particle Astrophysics, P.O. Box 500, MS 127, Batavia, IL 60510 (United States); Rowe, Jason F.; Christiansen, Jessie L. [SETI Institute, Mountain View, CA 94043 (United States); Carter, Joshua A.; Fressin, Francois; Geary, John [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Batalha, Natalie M. [Department of Physics and Astronomy, San Jose State University, San Jose, CA 95192 (United States); Borucki, William J.; Bryson, Steve; Haas, Michael R. [NASA Ames Research Center, Moffett Field, CA, 94035 (United States); Buchhave, Lars A. [Department of Astrophysics and Planetary Science, Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen (Denmark); Ciardi, David R. [NASA Exoplanet Science Institute/Caltech, Pasadena, CA 91126 (United States); Cochran, William D.; Endl, Michael [McDonald Observatory, The University of Texas, Austin TX 78730 (United States); Fanelli, Michael N. [Bay Area Environmental Research Institute/NASA Ames Research Center, Moffett Field, CA 94035 (United States); Fischer, Debra [Astronomy Department, Yale University, New Haven, CT (United States); Hall, Jennifer R., E-mail: daniel.fabrycky@gmail.com [Orbital Sciences Corporation/NASA Ames Research Center, Moffett Field, CA 94035 (United States); and others

    2012-05-10T23:59:59.000Z

    Eighty planetary systems of two or more planets are known to orbit stars other than the Sun. For most, the data can be sufficiently explained by non-interacting Keplerian orbits, so the dynamical interactions of these systems have not been observed. Here we present four sets of light curves from the Kepler spacecraft, each which of shows multiple planets transiting the same star. Departure of the timing of these transits from strict periodicity indicates that the planets are perturbing each other: the observed timing variations match the forcing frequency of the other planet. This confirms that these objects are in the same system. Next we limit their masses to the planetary regime by requiring the system remain stable for astronomical timescales. Finally, we report dynamical fits to the transit times, yielding possible values for the planets' masses and eccentricities. As the timespan of timing data increases, dynamical fits may allow detailed constraints on the systems' architectures, even in cases for which high-precision Doppler follow-up is impractical.

  9. Design and Optimization of a Feeder Demand Responsive Transit System in El Cenizo,TX

    E-Print Network [OSTI]

    Chandra, Shailesh

    2010-10-12T23:59:59.000Z

    time interval of a new demand responsive transit "feeder" service within one representative colonia, El Cenizo. A comprehensive analysis of the results of a survey conducted through a questionnaire is presented to explain the existing travel patterns...

  10. Design of an Instrumentation System for a Boundary Layer Transition Wing Glove Experiment

    E-Print Network [OSTI]

    Williams, Thomas 1987-

    2012-08-23T23:59:59.000Z

    side of the glove. Infrared (IR) thermography has been selected as the primary transition detection tool. A heat transfer analysis has shown that solar radiation will warm the surface of the glove above the adiabatic wall temperature and therefore...

  11. Essays on transition challenges for alternative propulsion vehicles and transportation systems

    E-Print Network [OSTI]

    Struben, Jeroen J. R

    2006-01-01T23:59:59.000Z

    Technology transitions require the formation of a self-sustaining market through alignment of consumers' interests, producers' capabilities, infrastructure development, and regulations. In this research I develop a broad ...

  12. Measuring journey time reliability in London using automated data collection systems

    E-Print Network [OSTI]

    Schil, Mickaël (Mickaël René Jerôme)

    2012-01-01T23:59:59.000Z

    Service reliability is critical for both users and operators of transit systems. The rapid spread of Automated Data Collection Systems, such as Automated Fare Collection (AFC) and Automatic Vehicle Location (AVL), provides ...

  13. Precursor systems analyses of automated highway systems: Commercial vehicle and transit ahs analysis. Volume 6. Final report, September 1993-February 1995

    SciTech Connect (OSTI)

    Bottiger, F.; Chemnitz, H.D.; Doorman, J.; Franke, U.; Zimmerman, T.

    1995-03-01T23:59:59.000Z

    This document is the final report of the Automated Highway System (AHS). The activities of Commercial Vehicle and Transit AHS Analysis are reported on in this document. This document type is resource materials. This volume is the six in a series. There are nine other volumes in the series.

  14. Dynamical Transitions in Large Systems of Mean Field-Coupled Landau-Stuart Oscillators: Extensive Chaos and Clumped States

    E-Print Network [OSTI]

    Wai Lim Ku; Michelle Girvan; Edward Ott

    2014-12-11T23:59:59.000Z

    In this paper, we study dynamical systems in which a large number $N$ of identical Landau-Stuart oscillators are globally coupled via a mean-field. Previously, it has been observed that this type of system can exhibit a variety of different dynamical behaviors including clumped states in which each oscillator is in one of a small number of groups for which all oscillators in each group have the same state which is different from group to group, as well as situations in which all oscillators have different states and the macroscopic dynamics of the mean field is chaotic. We argue that this second type of behavior is $^{\\backprime}$extensive$^{\\prime}$ in the sense that the chaotic attractor in the full phase space of the system has a fractal dimension that scales linearly with $N$ and that the number of positive Lyapunov exponents of the attractor also scales with linearly $N$. An important focus of this paper is the transition between clumped states and extensive chaos as the system is subjected to slow adiabatic parameter change. We observe explosive (i.e., discontinuous) transitions between the clumped states (which correspond to low dimensional dynamics) and the extensively chaotic states. Furthermore, examining the clumped state, as the system approaches the explosive transition to extensive chaos, we find that the oscillator population distribution between the clumps continually evolves so that the clumped state is always marginally stable. This behavior is used to reveal the mechanism of the explosive transition. We also apply the Kaplan-Yorke formula to study the fractal structure of the extensively chaotic attractors.

  15. 912 JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 13, NO. 6, DECEMBER 2004 Development of a Rapid-Response Flow-Control

    E-Print Network [OSTI]

    January 1999 Abstract. To date most of the microelectromechanical system (MEMS) devices have been based software. 1. Introduction Microelectromechanical systems (MEMS) is an emerging enabling technology

  16. Experimental observation of a phase transition in the evolution of many-body systems with dipolar interactions

    E-Print Network [OSTI]

    Gonzalo A. Alvarez; Dieter Suter; Robin Kaiser

    2014-09-16T23:59:59.000Z

    Non-equilibrium dynamics of many-body systems is important in many branches of science, such as condensed matter, quantum chemistry, and ultracold atoms. Here we report the experimental observation of a phase transition of the quantum coherent dynamics of a 3D many-spin system with dipolar interactions, and determine its critical exponents. Using nuclear magnetic resonance (NMR) on a solid-state system of spins at room-temperature, we quench the interaction Hamiltonian to drive the evolution of the system. The resulting dynamics of the system coherence can be localized or extended, depending on the quench strength. Applying a finite-time scaling analysis to the observed time-evolution of the number of correlated spins, we extract the critical exponents v = s = 0.42 around the phase transition separating a localized from a delocalized dynamical regime. These results show clearly that such nuclear-spin based quantum simulations can effectively model the non-equilibrium dynamics of complex many-body systems, such as 3D spin-networks with dipolar interactions.

  17. Dynamical hierarchy in transition states: Why and how does a system climb over the mountain?

    E-Print Network [OSTI]

    Berry, R. Stephen

    University, Nada, Kobe 657-8501, Japan; and Department of Chemistry and the James Franck Institute Institute of Technology, Pasadena, CA, and approved April 12, 2001 (received for review December 28, 2000 to visualize the stable and unstable invariant manifolds leading to and from the transition state, i

  18. Proton-coupled electron transfer reactions in solution: Molecular dynamics with quantum transitions for model systems

    E-Print Network [OSTI]

    Hammes-Schiffer, Sharon

    Proton-coupled electron transfer reactions in solution: Molecular dynamics with quantum transitions A general minimal model for proton-coupled electron transfer PCET reactions in solution is presented. This model consists of three coupled degrees of freedom that represent an electron, a proton, and a solvent

  19. National Renewable Energy Laboratory's Hydrogen Technologies and Systems Center is Helping to Facilitate the Transition to a New Energy Future

    SciTech Connect (OSTI)

    Not Available

    2011-01-01T23:59:59.000Z

    The Hydrogen Technologies and Systems Center (HTSC) at the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) uses a systems engineering and integration approach to hydrogen research and development to help the United States make the transition to a new energy future - a future built on diverse and abundant domestic renewable resources and integrated hydrogen systems. Research focuses on renewable hydrogen production, delivery, and storage; fuel cells and fuel cell manufacturing; technology validation; safety, codes, and standards; analysis; education; and market transformation. Hydrogen can be used in fuel cells to power vehicles and to provide electricity and heat for homes and offices. This flexibility, combined with our increasing demand for energy, opens the door for hydrogen power systems. HTSC collaborates with DOE, other government agencies, industry, communities, universities, national laboratories, and other stakeholders to promote a clean and secure energy future.

  20. Disordered electronic and magnetic systems - transition metal (Mn) and rare earth (Gd) doped amorphous group IV semiconductors (C, Si, Ge)

    E-Print Network [OSTI]

    Zeng, Li

    2007-01-01T23:59:59.000Z

    various transition or rare-earth metals provide a rich ?eldTransition Metal (Mn) and Rare Earth (Gd) Doped AmorphousTransition Metal (Mn) and Rare Earth (Gd) Doped Amorphous

  1. Lattice crossover and phase transitions in NdAlO{sub 3}-GdAlO{sub 3} system

    SciTech Connect (OSTI)

    Vasylechko, L., E-mail: crystal-lov@polynet.lviv.ua [Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv (Ukraine); Shmanko, H.; Ohon, N. [Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv (Ukraine)] [Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv (Ukraine); Prots, Yu.; Hoffmann, S. [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, 01187 Dresden (Germany)] [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, 01187 Dresden (Germany); Ubizskii, S. [Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv (Ukraine)] [Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv (Ukraine)

    2013-02-15T23:59:59.000Z

    Phase and structural behaviour in the (1-x)NdAlO{sub 3}-xGdAlO{sub 3} system in a whole concentration range has been studied by means of in situ high-resolution X-ray synchrotron powder diffraction technique and differential thermal analysis. Two kinds of solid solutions Nd{sub 1-x}Gd{sub x}AlO{sub 3} have been found at room temperature: one with rhombohedral (x<0.15) and one with orthorhombic (x{>=}0.20) symmetry. A morphotropic phase transition occurs at x Almost-Equal-To 0.15, where the co-existence of both phases was observed. Peculiarity of the orthorhombic solid solution is the lattice parameter crossover at the compositions with x=0.33, 0.49 and 0.62. First-order structural transition Pbnm{r_reversible}R3{sup Macron }c has been detected both from in situ powder diffraction and thermal analysis data. Continuous phase transformation R3{sup Macron }c{r_reversible}Pm3{sup Macron }m above 2140 K has been predicted for Nd-rich sample Nd{sub 0.85}Gd{sub 0.15}AlO{sub 3} from the extrapolation of high-temperature behaviour of the lattice parameter ratio of the rhombohedral phase. Based on the experimental data, the phase diagram of the pseudo-binary system NdAlO{sub 3}-GdAlO{sub 3} has been constructed. - Graphical abstract: Concentration dependencies of normalized lattice parameters of Nd{sub 1-x}Gd{sub x}AlO{sub 3} perovskite solid solutions. Highlights: Black-Right-Pointing-Pointer Two kinds of solid solutions Nd{sub 1-x}Gd{sub x}AlO{sub 3} were found in the NdAlO{sub 3}-GdAlO{sub 3} system. Black-Right-Pointing-Pointer Morphotropic transition between both perovskite phases occurs at x Almost-Equal-To 0.15. Black-Right-Pointing-Pointer Lattice parameter crossover was found in orthorhombic solid solution. Black-Right-Pointing-Pointer Temperature driven first-order phase transition Pbnm{r_reversible}R3{sup Macron }c was found in Nd{sub 1-x}Gd{sub x}AlO{sub 3}. Black-Right-Pointing-Pointer Phase diagram of the pseudo-binary system NdAlO{sub 3}-GdAlO{sub 3} has been constructed.

  2. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: REGULAR PAPERS, VOL. 61, NO. 9, SEPTEMBER 2014 2747 Understanding Early Indicators of Critical Transitions

    E-Print Network [OSTI]

    Lakoba, Taras I.

    for three small power system models, using the stochastic differential algebraic equations (SDAE) associated], the human brain [5] and electric power systems [6]­[8]. Scheffer et al. [1] provide some explanation for why Understanding Early Indicators of Critical Transitions in Power Systems From Autocorrelation Functions Goodarz

  3. Simulations of flame acceleration and deflagration-to-detonation transitions in methane-air systems

    SciTech Connect (OSTI)

    Kessler, D.A.; Gamezo, V.N.; Oran, E.S. [Laboratory for Computational Physics and Fluid Dynamics, Naval Research Laboratory, Washington, DC (United States)

    2010-11-15T23:59:59.000Z

    Flame acceleration and deflagration-to-detonation transitions (DDT) in large obstructed channels filled with a stoichiometric methane-air mixture are simulated using a single-step reaction mechanism. The reaction parameters are calibrated using known velocities and length scales of laminar flames and detonations. Calculations of the flame dynamics and DDT in channels with obstacles are compared to previously reported experimental data. The results obtained using the simple reaction model qualitatively, and in many cases, quantitatively match the experiments and are found to be largely insensitive to small variations in model parameters. (author)

  4. Studies of high temperature ternary phases in mixed-metal-rich early transition metal sulfide and phosphide systems

    SciTech Connect (OSTI)

    Marking, G.A.

    1994-01-04T23:59:59.000Z

    Investigations of ternary mixed early transition metal-rich sulfide and phosphide systems resulted in the discovery of new structures and new phases. A new series of Zr and Hf - group V transition metal - sulfur K-phases was synthesized and crystallographically characterized. When the group V transition metal was Nb or Ta, the unit cell volume was larger than any previously reported K-phase. The presence of adventitious oxygen was determined in two K-phases through a combination of neutron scattering and X-ray diffraction experiments. A compound Hf{sub 10}Ta{sub 3}S{sub 3} was found to crystallize in a new-structure type similar to the known gamma brasses. This structure is unique in that it is the only reported {open_quotes}stuffed{close_quotes} gamma-brass type structure. The metal components, Hf and Ta, are larger in size and more electropositive than the metals found in normal gamma brasses (e.g. Cu and Zn) and because of the larger metallic radii, sulfur can be incorporated into the structure where it plays an integral role in stabilizing this phase relative to others. X-ray single-crystal, X-ray powder and neutron powder refinements were performed on this structure. A new structure was found in the ternary Nb-Zr-P system which has characteristics in common with many known early transition metal-rich sulfides, selenides, and phosphides. This structure has the simplest known interconnection of the basic building blocks known for this structural class. Anomalous scattering was a powerful tool for differentiating between Zr and Nb when using Mo K{alpha} X-radiation. The compounds ZrNbP and HfNbP formed in the space group Prima with the simple Co{sub 2}Si structure which is among the most common structures found for crystalline solid materials. Solid solution compounds in the Ta-Nb-P, Ta-Zr-P, Nb-Zr-P, Hf-Nb-P, and Hf-Zr-S systems were crystallographically characterized. The structural information corroborated ideas about bonding in metal-rich compounds.

  5. JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 21, NO. 2, APRIL 2012 497 Rapid Silicon-to-Steel Bonding by Induction

    E-Print Network [OSTI]

    Lin, Liwei

    , thermocompressive diffusion bonding has been demonstrated for the bonding of sil- icon nitride to steel [1], [2-to-Steel Bonding by Induction Heating for MEMS Strain Sensors Brian D. Sosnowchik, Robert G. Azevedo, Member, IEEE and manufacturable technique to bond sil- icon to steel for microelectromechanical system (MEMS) sensor applications

  6. HST.921 / HST.923 Information Technology in the Health Care System of the Future, Spring 2003

    E-Print Network [OSTI]

    Locke, Steven E. (Steven Elliot)

    The healthcare system in the US has been in the midst of a rapid transition in response to changing trends and patterns of care. The growing emphasis on evidence-based medical practice, continuous quality improvement, ...

  7. April 30, 2013 Mathematical and Computer Modelling of Dynamical Systems criticalTransitions Mathematical and Computer Modelling of Dynamical Systems

    E-Print Network [OSTI]

    Gedeon, Tomas

    , from those appearing in physiology and ecology to Earth systems modeling, often experience critical

  8. Critical scaling and aging in cooling systems near the jamming transition

    E-Print Network [OSTI]

    D. A. Head

    2009-04-01T23:59:59.000Z

    We conduct athermal simulations of freely-cooling, viscous soft spheres around the jamming transition density \\phi_{J}, and find evidence for a growing length \\xi(t) that governs relaxation to mechanical equilibrium. \\xi(t) is manifest in both the velocity correlation function, and the spatial correlations in a scalar measure of local force balance which we define. Data for different densities \\phi can be collapsed onto two master curves by scaling \\xi(t) and t by powers of |\\phi-\\phi_{J}|, indicative of critical scaling. Furthermore, particle transport for \\phi>\\phi_{J} exhibits aging and superdiffusion similar to a range of soft matter experiments, suggesting a common origin. Finally, we explain how \\xi(t) at late times maps onto known behavior away from \\phi_{J}.

  9. M. D. Lemmon and P. J. Antsaklis, "On The Stability of Logical Transitions in Hybrid Control Systems," Technical Report of the ISIS (Interdisciplinary Studies of Intelligent Systems) Group, No. ISIS-93-009,

    E-Print Network [OSTI]

    Antsaklis, Panos

    Systems," Technical Report of the ISIS (Interdisciplinary Studies of Intelligent Systems) Group, No. ISIS of Logical Transitions in Hybrid Control Systems," Technical Report of the ISIS (Interdisciplinary Studies of Intelligent Systems) Group, No. ISIS-93-009, Univ of Notre Dame, December 1993. #12;M. D. Lemmon and P. J

  10. Dispersal of planets hosted in binaries, transitional members of multiple star systems

    E-Print Network [OSTI]

    F. Marzari; M. Barbieri

    2007-07-04T23:59:59.000Z

    This paper explains why planets in binary star systems might have a lower frequency. A transient triple state of the binary causes the dispersal of planets.

  11. Excited-state quantum phase transitions in systems with two degrees of freedom: Level density, level dynamics, thermal properties

    SciTech Connect (OSTI)

    Stránský, Pavel [Institute of Particle and Nuclear Physics, Faculty of Mathematics and Physics, Charles University, V Holešovi?kách 2, 18000 Prague (Czech Republic); Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, 04510, México, D.F. (Mexico); Macek, Michal [Racah Institute of Physics, The Hebrew University, 91904 Jerusalem (Israel); Institute of Particle and Nuclear Physics, Faculty of Mathematics and Physics, Charles University, V Holešovi?kách 2, 18000 Prague (Czech Republic); Cejnar, Pavel, E-mail: pavel.cejnar@mff.cuni.cz [Institute of Particle and Nuclear Physics, Faculty of Mathematics and Physics, Charles University, V Holešovi?kách 2, 18000 Prague (Czech Republic)

    2014-06-15T23:59:59.000Z

    Quantum systems with a finite number of freedom degrees f develop robust singularities in the energy spectrum of excited states as the system’s size increases to infinity. We analyze the general form of these singularities for low f, particularly f=2, clarifying the relation to classical stationary points of the corresponding potential. Signatures in the smoothed energy dependence of the quantum state density and in the flow of energy levels with an arbitrary control parameter are described along with the relevant thermodynamical consequences. The general analysis is illustrated with specific examples of excited-state singularities accompanying the first-order quantum phase transition. -- Highlights: •ESQPTs found in infinite-size limit of systems with low numbers of freedom degrees f. •ESQPTs related to non-analytical evolutions of classical phase–space properties. •ESQPT signatures analyzed for general f, particularly f=2, extending known case f=1. •ESQPT signatures identified in smoothened density and flow of energy spectrum. •ESQPTs shown to induce a new type of thermodynamic anomalies.

  12. First-principles transition-metal catalysis : efficient and accurate approaches for studying enzymatic systems

    E-Print Network [OSTI]

    Kulik, Heather J

    2009-01-01T23:59:59.000Z

    (cont.) We apply our approach to several paradigmatic systems: spin state splittings and structural properties of Fe2 and other small molecules as well as the addition-elimination reactions of hydrogen and methane on FeO+ ...

  13. The chiral transition as an Anderson transition

    E-Print Network [OSTI]

    Matteo Giordano; Sandor D. Katz; Tamas G. Kovacs; Ferenc Pittler

    2014-10-31T23:59:59.000Z

    At low temperature the low-lying QCD Dirac spectrum obeys random matrix statistics. Recently we found that above $T_{c}$ the lowest part of the spectrum consists of localized modes that obey Poisson statistics. An interesting implication of this is that as the system crosses $T_{c}$ from above, the spectral statistics at $\\lambda=0$ changes from Poisson to random matrix. Here we study this transition and its possible implications for the finite temperature transition of QCD-like theories.

  14. Advances in rapid prototyping

    SciTech Connect (OSTI)

    Atwood, C.L.; McCarty, G.D.; Pardo, B.T.; Bryce, E.A.

    1993-12-31T23:59:59.000Z

    Recent advances in stereolithography and selective laser sintering have had a significant impact on the overall quality of parts produced using these rapid prototyping processes. The development and implementation of 3D System`s QuickCast{trademark} resin and software for building investment casting patterns have proven to be major steps toward fabricating highly accurate patterns with very good surface finishes. Sandia uses patterns generated from rapid prototyping processes to reduce the cycle time and cost of fabricating prototype parts in support of a Sandia National Laboratories managed program called FASTCAST. As participants in the Beta test program for QuickCast{trademark} resin and software, they experienced a steep learning curve and were able to build accurate parts in a short period of time. It is now possible, using this technology, to produce highly accurate prototype parts as well as acceptable firs article and small lots size production parts. They use the Selective Laser Sintering (SLS) process to fabricate prototype wax patterns for investment casting. DTM Corporation recently introduced the use of their polycarbonate material for fabricating investment casting patterns. The polycarbonate material is processed significantly faster, with improved strength, dimensional stability, and without a support structure during the build process. Sandia is currently changing from investment casting wax to polycarbonate for the fabrication of investment casting patterns using the SLS process. This presentation will focus on the successes with these new materials from the standpoints of application, accuracy, surface finish, and post processing. Also presented will be examples of parts manufactured by these processes.

  15. Theoretical study of intraband optical transitions in conduction band of dot-in-a-well system

    SciTech Connect (OSTI)

    Chaganti, Venkata R.; Apalkov, Vadym [Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30302 USA. (Georgia)] [Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30302 USA. (Georgia)

    2014-02-15T23:59:59.000Z

    We study numerically absorption optical spectra of n-doped InAs/In{sub 015}Ga{sub 085}As/GaAs quantum dot-in-a-well systems. The absorption spectra are mainly determined by the size of a quantum dot and have weak dependence on the thickness of quantum well and position of the dot in a well. The dot-in-a-well system is sensitive to both in-plane and out-of-plane polarizations of the incident light with much stronger absorption intensities for the in-plane-polarized light. The absorption spectrum of in-plane-polarized light has also a multi-peak structure with two or three peaks of comparable intensities, while the absorption spectrum of out-of-plane polarized light has a single well-pronounced peak.

  16. LARGE SCALE SIMULATIONS OF THE MECHANCIAL PROPERTIES OF LAYERED TRANSITION METAL TERNARY COMPOUNDS FOR FOSSIL ENERGY POWER SYSTEM APPLICATIONS

    SciTech Connect (OSTI)

    Ching, Wai-Yim

    2014-12-31T23:59:59.000Z

    Advanced materials with applications in extreme conditions such as high temperature, high pressure, and corrosive environments play a critical role in the development of new technologies to significantly improve the performance of different types of power plants. Materials that are currently employed in fossil energy conversion systems are typically the Ni-based alloys and stainless steels that have already reached their ultimate performance limits. Incremental improvements are unlikely to meet the more stringent requirements aimed at increased efficiency and reduce risks while addressing environmental concerns and keeping costs low. Computational studies can lead the way in the search for novel materials or for significant improvements in existing materials that can meet such requirements. Detailed computational studies with sufficient predictive power can provide an atomistic level understanding of the key characteristics that lead to desirable properties. This project focuses on the comprehensive study of a new class of materials called MAX phases, or Mn+1AXn (M = a transition metal, A = Al or other group III, IV, and V elements, X = C or N). The MAX phases are layered transition metal carbides or nitrides with a rare combination of metallic and ceramic properties. Due to their unique structural arrangements and special types of bonding, these thermodynamically stable alloys possess some of the most outstanding properties. We used a genomic approach in screening a large number of potential MAX phases and established a database for 665 viable MAX compounds on the structure, mechanical and electronic properties and investigated the correlations between them. This database if then used as a tool for materials informatics for further exploration of this class of intermetallic compounds.

  17. Texas A&M Transportation Institute | 2012 Page | 1 Seven transit providers in the Central Puget Sound region came together to develop the ORCA fare card system.

    E-Print Network [OSTI]

    in the Central Puget Sound region came together to develop the ORCA fare card system. The providers include outlets, phone, ticket vending machines, or ORCA customer service offices. History The Central Puget Sound to honor paper transfers. In 1999, Sound Transit and the region developed the PugetPass, which

  18. First-Order Transition in the Magnetic Vortex Matter in Superconducting MgB2 Tuned by Disorder

    E-Print Network [OSTI]

    Boyer, Edmond

    First-Order Transition in the Magnetic Vortex Matter in Superconducting MgB2 Tuned by Disorder T such as Wigner crystals, charge density waves, magnetic bubble arrays, or vortices in type-II superconductors posi- tional correlations. Vortices in superconductors rapidly became the system of choice

  19. Methods and systems for low frequency seismic and infrasound detection of geo-pressure transition zones

    DOE Patents [OSTI]

    Shook, G. Michael; LeRoy, Samuel D.; Benzing, William M.

    2006-07-18T23:59:59.000Z

    Methods for determining the existence and characteristics of a gradational pressurized zone within a subterranean formation are disclosed. One embodiment involves employing an attenuation relationship between a seismic response signal and increasing wavelet wavelength, which relationship may be used to detect a gradational pressurized zone and/or determine characteristics thereof. In another embodiment, a method for analyzing data contained within a response signal for signal characteristics that may change in relation to the distance between an input signal source and the gradational pressurized zone is disclosed. In a further embodiment, the relationship between response signal wavelet frequency and comparative amplitude may be used to estimate an optimal wavelet wavelength or range of wavelengths used for data processing or input signal selection. Systems for seismic exploration and data analysis for practicing the above-mentioned method embodiments are also disclosed.

  20. Systems for low frequency seismic and infrasound detection of geo-pressure transition zones

    DOE Patents [OSTI]

    Shook, G. Michael (Idaho Falls, ID); LeRoy, Samuel D. (Houston, TX); Benzing, William M. (Tulsa, OK)

    2007-10-16T23:59:59.000Z

    Methods for determining the existence and characteristics of a gradational pressurized zone within a subterranean formation are disclosed. One embodiment involves employing an attenuation relationship between a seismic response signal and increasing wavelet wavelength, which relationship may be used to detect a gradational pressurized zone and/or determine characteristics thereof. In another embodiment, a method for analyzing data contained within a response signal for signal characteristics that may change in relation to the distance between an input signal source and the gradational pressurized zone is disclosed. In a further embodiment, the relationship between response signal wavelet frequency and comparative amplitude may be used to estimate an optimal wavelet wavelength or range of wavelengths used for data processing or input signal selection. Systems for seismic exploration and data analysis for practicing the above-mentioned method embodiments are also disclosed.

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

    SciTech Connect (OSTI)

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

    2006-01-01T23:59:59.000Z

    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.

  2. Transition to classical chaos in a coupled quantum system through continuous measurement

    SciTech Connect (OSTI)

    Ghose, Shohini; Alsing, Paul; Deutsch, Ivan; Bhattacharya, Tanmoy; Habib, Salman [Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131 (United States); T-8 Theoretical Division, MS B285, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

    2004-05-01T23:59:59.000Z

    Continuous observation of a quantum system yields a measurement record that faithfully reproduces the classically predicted trajectory provided that the measurement is sufficiently strong to localize the state in phase space but weak enough that quantum backaction noise is negligible. We investigate the conditions under which classical dynamics emerges, via a continuous position measurement, for a particle moving in a harmonic well with its position coupled to internal spin. As a consequence of this coupling, we find that classical dynamics emerges only when the position and spin actions are both large compared to ({Dirac_h}/2{pi}). These conditions are quantified by placing bounds on the size of the covariance matrix which describes the delocalized quantum coherence over extended regions of phase space. From this result, it follows that a mixed quantum-classical regime (where one subsystem can be treated classically and the other not) does not exist for a continuously observed spin-(1/2) particle. When the conditions for classicality are satisfied (in the large-spin limit), the quantum trajectories reproduce both the classical periodic orbits as well as the classically chaotic phase space regions. As a quantitative test of this convergence, we compute the largest Lyapunov exponent directly from the measured quantum trajectories and show that it agrees with the classical value.

  3. Semi-classical determination of exponentially small intermode transitions for 1+1 space-time scattering systems

    E-Print Network [OSTI]

    Magali Marx; Alain Joye

    2005-08-24T23:59:59.000Z

    We consider the semiclassical limit of systems of autonomous PDE's in 1+1 space-time dimensions in a scattering regime. We assume the matrix valued coefficients are analytic in the space variable and we further suppose that the corresponding dispersion relation admits real-valued modes only with one-dimensional polarization subspaces. Hence a BKW-type analysis of the solutions is possible. We typically consider time-dependent solutions to the PDE which are carried asymptotically in the past and as $x\\to -\\infty$ along one mode only and determine the piece of the solution that is carried for $x\\to +\\infty$ along some other mode in the future. Because of the assumed non-degeneracy of the modes, such transitions between modes are exponentially small in the semiclassical parameter; this is an expression of the Landau-Zener mechanism. We completely elucidate the space-time properties of the leading term of this exponentially small wave, when the semiclassical parameter is small, for large values of $x$ and $t$, when some avoided crossing of finite width takes place between the involved modes.

  4. Infall and rotation motions in the HH 111 protostellar system: A flattened envelope in transition to a disk?

    E-Print Network [OSTI]

    Chin-Fei Lee; Yao-Yuan Mao; Bo Reipurth

    2008-12-29T23:59:59.000Z

    We have mapped the central region of the HH 111 protostellar system in 1.33 mm continuum, C18O(J=2-1), 13CO (J=2-1), and SO (N_J=5_6-4_5) emission at ~3" resolution with the Submillimeter Array. There are two sources, VLA 1 (=IRAS 05491+0247) and VLA 2, with the VLA 1 source driving the HH 111 jet. Thermal emission is seen in 1.33 mm continuum tracing the dust in the envelope and the putative disks around the sources. A flattened, torus-like envelope is seen in C18O and 13CO around the VLA 1 source surrounding the dust lane perpendicular to the jet axis, with an inner radius of ~ 400 AU (1"), an outer radius of ~ 3200 AU (8"), and a thickness of ~ 1000 AU (2.5"). It seems to be infalling toward the center with conservation of specific angular momentum rather than with a Keplerian rotation as assumed by Yang et al. 1997. An inner envelope is seen in SO, with a radius of ~ 500 AU (1.3"). The inner part of this inner envelope, which is spatially coincident with the dust lane, seems to have a differential rotation and thus may have formed a rotationally supported disk. The outer part of this inner envelope, however, may have a rotation velocity decreasing toward the center and thus represent a region where an infalling envelope is in transition to a rotationally supported disk. A brief comparison with a collapsing model suggests that the flattened, torus-like envelope seen in C18O and 13CO could result from a collapse of a magnetized rotating toroid.

  5. Phase transitions and equation of state of CsI under high pressure and the development of a focusing system for x-rays

    SciTech Connect (OSTI)

    Wu, Yan.

    1990-11-01T23:59:59.000Z

    The phase transitions and equation of state of ionic solid cesium iodide were studied under high pressure and room temperature in a diamond anvil cell. The studies were carried out using both energy dispersive and angular dispersive diffraction methods on synchrotron radiation sources over the pressure range from atmospheric pressure to over 300 gigapascals (3 million atmospheres). CsI undergoes a distinct phase transition at about 40 GPa, a pressure that is much lower than the reported insulator-metal transition at 110 GPa, from the atmospheric pressure B2(CsCl) structure to an orthorhombic structure. At higher pressures, a continuous distortion in the structure was observed with a final structure similar to a hcp lattice under ultra high pressure. No volume discontinuity was observed at the insulator-metal transition. The newly found transition sequence is different from the result of previous static compression studies. The current structure has a smaller unit cell volume than the previous assignment. This has resolved a long existing controversy among the previous static compression studies, the dynamic compression studies, and the theoretical studies. The current results also explain the apparent discrepancy between the present study and the previous static studies. We also present the development of a focusing system for high energy x-rays (> 12 keV) that is particularly suited for high pressure diffraction studies. This system uses a pair of multilayer coated spherical mirrors in a Kirkpatrick-Baez geometry. A focused beam size less than 10 micron in diameter can be readily achieved with sufficient intensity to perform diffraction studies. 93 refs., 46 figs., 15 tabs.

  6. CONTRIBUTION TO THE ACM CONFERENCE ON HUMAN FACTORS IN COMPUTING SYSTEMS (CHI '89) Topic Area: Interface Design Tools and Techniques (specifically: User Interface Tools Kits; Rapid

    E-Print Network [OSTI]

    Fischer, Gerhard

    for Constructive and Argumentative Design Gerhard Fischer and Anders Morch Department of Computer Science and contains useful information about the principles of kitchen design. The integration of these two types: Interface Design Tools and Techniques (specifically: User Interface Tools Kits; Rapid Prototyping

  7. Gender, Truth & Transition

    E-Print Network [OSTI]

    Ní Aoláin, Pionnuala; Turner, Catherine

    2007-01-01T23:59:59.000Z

    50. Id. GENDER, TRUTH & TRANSITION contested, as evidencedG. Teitel, Human Rights in Transition: Transitional JusticeU.N. GENDER, TRUTH & TRANSITION Organization of American

  8. Viscosity near phase transitions

    E-Print Network [OSTI]

    Antonio Dobado; Felipe J. Llanes-Estrada; Juan M. Torres-Rincon

    2010-09-30T23:59:59.000Z

    Probably the most enticing observation in theoretical physics during the last decade was the discovery of the great amount of consequences obtained from the AdS/CFT conjecture put forward by Maldacena. In this work we review how this correspondence can be used to address hydrodynamic properties such as the viscosity of some strongly interacting systems. We also employ the Boltzmann equation for those systems closer to low-energy QCD, and argue that this kind of transport coefficients can be related to phase transitions, in particular the QGP/hadronic phase transition studied in heavy ion collisions.

  9. Theoretical modeling of UV-Vis absorption and emission spectra in liquid state systems including vibrational and conformational effects: Explicit treatment of the vibronic transitions

    SciTech Connect (OSTI)

    D’Abramo, Marco [Supercomputing Applications and Innovation, CINECA, Via dei Tizii, 6, 00185 Rome (Italy) [Supercomputing Applications and Innovation, CINECA, Via dei Tizii, 6, 00185 Rome (Italy); Dipartimento di Chimica, Universitá Sapienza, P.le Aldo Moro, 5, 00185, Rome (Italy); Aschi, Massimiliano [Department of Physical and Chemical Sciences, University of Aquila, via Vetoio (Coppito 1), 67010 Aquila (Italy)] [Department of Physical and Chemical Sciences, University of Aquila, via Vetoio (Coppito 1), 67010 Aquila (Italy); Amadei, Andrea, E-mail: andrea.amadei@uniroma2.it [Dipartimento di Scienze e Tecnologie Chimiche Universita’ di Roma, Tor Vergata, via della Ricerca Scientifica 1, I-00133 Roma (Italy)] [Dipartimento di Scienze e Tecnologie Chimiche Universita’ di Roma, Tor Vergata, via della Ricerca Scientifica 1, I-00133 Roma (Italy)

    2014-04-28T23:59:59.000Z

    Here, we extend a recently introduced theoretical-computational procedure [M. D’Alessandro, M. Aschi, C. Mazzuca, A. Palleschi, and A. Amadei, J. Chem. Phys. 139, 114102 (2013)] to include quantum vibrational transitions in modelling electronic spectra of atomic molecular systems in condensed phase. The method is based on the combination of Molecular Dynamics simulations and quantum chemical calculations within the Perturbed Matrix Method approach. The main aim of the presented approach is to reproduce as much as possible the spectral line shape which results from a subtle combination of environmental and intrinsic (chromophore) mechanical-dynamical features. As a case study, we were able to model the low energy UV-vis transitions of pyrene in liquid acetonitrile in good agreement with the experimental data.

  10. Rapid road repair vehicle

    DOE Patents [OSTI]

    Mara, Leo M. (Livermore, CA)

    1999-01-01T23:59:59.000Z

    Disclosed are improvments to a rapid road repair vehicle comprising an improved cleaning device arrangement, two dispensing arrays for filling defects more rapidly and efficiently, an array of pre-heaters to heat the road way surface in order to help the repair material better bond to the repaired surface, a means for detecting, measuring, and computing the number, location and volume of each of the detected surface imperfection, and a computer means schema for controlling the operation of the plurality of vehicle subsystems. The improved vehicle is, therefore, better able to perform its intended function of filling surface imperfections while moving over those surfaces at near normal traffic speeds.

  11. TRANSITION DE MOTT METAL-INSULATOR TRANSITIONS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    TRANSITION DE MOTT METAL-INSULATOR TRANSITIONS IN TRANSITION METAL OXIDES by D. B. McWHAN, A. MENTH oxydes de metaux de transition on observe une transition d'isolant a metal puis de metal a isolant de type Mott lorsque l'on augmentelenombre d'electrons d. Danslesysthe(V1-~Cr~)203une transition de Mott

  12. Groundwater age, life expectancy and transit time distributions in advective-dispersive systems: 1. Generalized reservoir theory

    E-Print Network [OSTI]

    Cornaton, F; 10.1016/j.advwatres.2005.10.009

    2011-01-01T23:59:59.000Z

    We present a methodology for determining reservoir groundwater age and transit time probability distributions in a deterministic manner, considering advective-dispersive transport in steady velocity fields. In a first step, we propose to model the statistical distribution of groundwater age at aquifer scale by means of the classical advection-dispersion equation for a conservative and nonreactive tracer, associated to proper boundary conditions. The evaluated function corresponds to the density of probability of the random variable age, age being defined as the time elapsed since the water particles entered the aquifer. An adjoint backward model is introduced to characterize the life expectancy distribution, life expectancy being the time remaining before leaving the aquifer. By convolution of these two distributions, groundwater transit time distributions, from inlet to outlet, are fully defined for the entire aquifer domain. In a second step, an accurate and efficient method is introduced to simulate the tr...

  13. Light disappears rapidly (exponentially)

    E-Print Network [OSTI]

    Kudela, Raphael M.

    #12;#12;#12;#12;Light disappears rapidly (exponentially) with depth At the same time, the color of the light shifts #12;#12;#12;#12;· Euphotic zone ­ plentiful light ­ 0-100 m (about) · Dysphotic zone ­ very, very little light ­ 100-1000 m (about) · Aphotic zone ­ no light ­ below 1000 m #12;Sunlight in Water

  14. Stochastic approaches for solving Rapid Transit Network Design ...

    E-Print Network [OSTI]

    2011-08-16T23:59:59.000Z

    networks. Considering that the new topology is oriented to define public lines, to cover the demand by public transportation, a bounded budget and the modal com- ...... Handbook in Operations Research and Management Science, vol 10, El-.

  15. Improving Robust Rolling Stock Circulation in Rapid Transit Networks

    E-Print Network [OSTI]

    2011-08-31T23:59:59.000Z

    Aug 31, 2011 ... both solutions, the EDR with respect to the sequential approach is of the ... However, a great EDR compared to the current solution is obtained.

  16. Bus Rapid Transit Planning Guide | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomassSustainable andBucoda,Burke County,Information BurntBurtBurtonsville,Bus

  17. Global Bus Rapid Transit (BRT) Database | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetec AG Contracting Jump to:Echo, Maryland:Glenwillow, Ohio:|

  18. The study of multifragmentation around transition energy in intermediate energy heavy-ion collisions

    E-Print Network [OSTI]

    Karan Singh Vinayak; Suneel Kumar

    2011-01-28T23:59:59.000Z

    Fragmentation of light charged particles is studied for various systems at different incident energies between 50 and 1000 MeV/nucleon. We analyze fragment production at incident energies above, below and at transition energies using the isospin dependent quantum molecular dynamics(IQMD) model. The trends observed for the fragment production and rapidity distributions depend upon the incident energy, size of the fragments, composite mass of the reacting system as well as on the impact parameter of the reaction. The free nucleons and light charged particles show continous homogeneous changes irrespective of the transition energies indicating that there is no relation between the transition energy and production of the free as well as light charged particles.

  19. The rapid tooling testbed: a distributed

    E-Print Network [OSTI]

    Chen, Yong

    the manufacturing activity, and that little additional communication between these activities is necessary. UnderThe rapid tooling testbed: a distributed design-for- manufacturing system David W. Rosen Yong Chen Engineer at 3D Systems, Valencia, California, USA. Shiva Sambu is a Manufacturing Engineer at Align

  20. High precision, rapid laser hole drilling

    DOE Patents [OSTI]

    Chang, Jim J.; Friedman, Herbert W.; Comaskey, Brian J.

    2013-04-02T23:59:59.000Z

    A laser system produces a first laser beam for rapidly removing the bulk of material in an area to form a ragged hole. The laser system produces a second laser beam for accurately cleaning up the ragged hole so that the final hole has dimensions of high precision.

  1. High precision, rapid laser hole drilling

    DOE Patents [OSTI]

    Chang, Jim J.; Friedman, Herbert W.; Comaskey, Brian J.

    2007-03-20T23:59:59.000Z

    A laser system produces a first laser beam for rapidly removing the bulk of material in an area to form a ragged hole. The laser system produces a second laser beam for accurately cleaning up the ragged hole so that the final hole has dimensions of high precision.

  2. High precision, rapid laser hole drilling

    DOE Patents [OSTI]

    Chang, Jim J.; Friedman, Herbert W.; Comaskey, Brian J.

    2005-03-08T23:59:59.000Z

    A laser system produces a first laser beam for rapidly removing the bulk of material in an area to form a ragged hole. The laser system produces a second laser beam for accurately cleaning up the ragged hole so that the final hole has dimensions of high precision.

  3. Using land value capture to fund rail transit extensions in Mexico City and Santiago de Chile

    E-Print Network [OSTI]

    Covarrubias, Alvaro, 1973-

    2004-01-01T23:59:59.000Z

    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 ...

  4. Rapid road repair vehicle

    DOE Patents [OSTI]

    Mara, Leo M. (Livermore, CA)

    1998-01-01T23:59:59.000Z

    Disclosed is a rapid road repair vehicle capable of moving over a surface to be repaired at near normal posted traffic speeds to scan for and find an the high rate of speed, imperfections in the pavement surface, prepare the surface imperfection for repair by air pressure and vacuum cleaning, applying a correct amount of the correct patching material to effect the repair, smooth the resulting repaired surface, and catalog the location and quality of the repairs for maintenance records of the road surface. The rapid road repair vehicle can repair surface imperfections at lower cost, improved quality, at a higher rate of speed than was was heretofor possible, with significantly reduced exposure to safety and health hazards associated with this kind of road repair activities in the past.

  5. Rapid road repair vehicle

    DOE Patents [OSTI]

    Mara, L.M.

    1998-05-05T23:59:59.000Z

    Disclosed is a rapid road repair vehicle capable of moving over a surface to be repaired at near normal posted traffic speeds to scan for and find at the high rate of speed, imperfections in the pavement surface, prepare the surface imperfection for repair by air pressure and vacuum cleaning, applying a correct amount of the correct patching material to effect the repair, smooth the resulting repaired surface, and catalog the location and quality of the repairs for maintenance records of the road surface. The rapid road repair vehicle can repair surface imperfections at lower cost, improved quality, at a higher rate of speed than was not heretofor possible, with significantly reduced exposure to safety and health hazards associated with this kind of road repair activities in the past. 2 figs.

  6. Rapidly refuelable fuel cell

    DOE Patents [OSTI]

    Joy, R.W.

    1982-09-20T23:59:59.000Z

    A rapidly refuelable dual cell of an electrochemical type is described wherein a single anode cooperates with two cathodes and wherein the anode has a fixed position and the cathodes are urged toward opposite faces of the anodes at constant and uniform force. The associated cathodes are automatically retractable to permit the consumed anode remains to be removed from the housing and a new anode inserted between the two cathodes.

  7. Coherent Manipulation of Multi-Partite Quantum States in a Qubit-TLS System via Landau-Zener Transition

    E-Print Network [OSTI]

    Mao, Bo

    2010-09-12T23:59:59.000Z

    P Landau-Zener transition probability t P tunneling probability QC quantum computing QED quantum electrodynamics qubit quantum bit rms root mean square RWA rotating wave approximation () n R ? #0;G operator of rotation about vector n #0;G..............................................................................................................78 Fig. B.5. Schematic of low pass RC filters. For those in the flux bias lines, R= 249 ?, C= 680 pF, while for those in the dc SQUID lines, R= 2.49 k?, C= 68 pF. .......................79 Fig. C.1. Energy level diagram of the Nb sample LLC6 where...

  8. RAPID COMMUNICATIONS PHYSICAL REVIEW A 87, 031801(R) (2013)

    E-Print Network [OSTI]

    Kuzmich, Alex

    2013-01-01T23:59:59.000Z

    for long-term light storage. The differential ac Stark shift of the ground-level microwave transition usedRAPID COMMUNICATIONS PHYSICAL REVIEW A 87, 031801(R) (2013) Light storage on the time scale, Georgia 30332-0430, USA (Received 20 December 2012; published 6 March 2013) Light storage on the minute

  9. Consequentialism in Transition

    E-Print Network [OSTI]

    Coons, Christian

    2008-01-01T23:59:59.000Z

    the value of state transitions will allow us to sayConsequentialism in Transition Christian Coons Bowling Greenvalue of the state transitions, and not the states of

  10. Sampling diffusive transition paths

    E-Print Network [OSTI]

    F. Miller III, Thomas

    2009-01-01T23:59:59.000Z

    Sampling di?usive transition paths Thomas F. Miller III ?the algorithm to sample the transition path ensemble for thedynamics I. INTRODUCTION Transition path sampling (TPS) is a

  11. Variations of the infrared transmission properties with the metal{endash}insulator transition in thin films of the yttrium-hydride system

    SciTech Connect (OSTI)

    Lee, M. W.; Kuo, C. Y.; Lin, H. C.; Wang, H. C.

    2001-06-01T23:59:59.000Z

    This work investigates the variations of the infrared transmission spectra of yttrium-hydride films YH{sub x} during the hydrogen loading process for the frequency range 500{endash}4000 cm{minus}1. The results indicate that the transmittance slightly decreases in the dihydride phase, followed by a significant increase in the trihydride phase. In addition, the carrier concentration decreases, whereas the carrier relaxation time increases with hydrogen content. The hydrogen vibration modes at interstitial sites are completely screened in the dihydride phase. The screening effect decreases as the system goes through the metal{endash}insulator transition. Moreover, the screening effect can be continuously tuned by simply varying the hydrogen content in the yttrium-hydride system. Analysis indicates that the absorption intensity of the vibration mode depends on the carrier concentration. This effect can be used as a diagnostic tool for estimating the carrier concentration and hydrogen content in rare-earth hydrides. {copyright} 2001 American Institute of Physics.

  12. Dynamics of the phase transitions in the system of nonequilibrium charge carriers in quantum-dimensional Si{sub 1?x}Ge{sub x}/Si structures

    SciTech Connect (OSTI)

    Bagaev, V. S.; Krivobok, V. S., E-mail: krivobok@lebedev.ru; Nikolaev, S. N.; Onishchenko, E. E.; Pruchkina, A. A.; Aminev, D. F.; Skorikov, M. L. [Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation); Lobanov, D. N.; Novikov, A. V. [Russian Academy of Sciences, Institute for Physics of Microstructures (Russian Federation)

    2013-11-15T23:59:59.000Z

    The dynamics of the phase transition from an electron-hole plasma to an exciton gas is studied during pulsed excitation of heterostructures with Si{sub 1?x}Ge{sub x}/Si quantum wells. The scenario of the phase transition is shown to depend radically on the germanium content in the Si{sub 1?x}Ge{sub x} layer. The electron-hole system decomposes into a rarefied exciton and a dense plasma phases for quantum wells with a germanium content x = 3.5% in the time range 100–500 ns after an excitation pulse. In this case, the electron-hole plasma existing in quantum wells has all signs of an electron-hole liquid. A qualitatively different picture of the phase transition is observed for quantum wells with x = 9.5%, where no separation into phases with different electronic spectra is detected. The carrier recombination in the electron-hole plasma leads a gradual weakening of screening and the appearance of exciton states. For a germanium content of 5–7%, the scenario of the phase transition is complex: 20–250 ns after an excitation pulse, the properties of the electron-hole system are described in terms of a homogeneous electron-hole plasma, whereas its separation into an electron-hole liquid and an exciton gas is detected after 350 ns. It is shown that, for the electron-hole liquid to exist in quantum wells with x = 5–7% Ge, the exciton gas should have a substantially higher density than in quantum wells with x = 3.5% Ge. This finding agrees with a decrease in the depth of the local minimum of the electron-hole plasma energy with increasing germanium concentration in the SiGe layer. An increase in the density of the exciton gas coexisting with the electron-hole liquid is shown to enhance the role of multiparticle states, which are likely to be represented by trions T{sup +} and biexcitons, in the exciton gas.

  13. A case study review of technical and technology issues for transition of a utility load management program to provide system reliability resources in restructured electricity markets

    SciTech Connect (OSTI)

    Weller, G.H.

    2001-07-15T23:59:59.000Z

    Utility load management programs--including direct load control and interruptible load programs--were employed by utilities in the past as system reliability resources. With electricity industry restructuring, the context for these programs has changed; the market that was once controlled by vertically integrated utilities has become competitive, raising the question: can existing load management programs be modified so that they can effectively participate in competitive energy markets? In the short run, modified and/or improved operation of load management programs may be the most effective form of demand-side response available to the electricity system today. However, in light of recent technological advances in metering, communication, and load control, utility load management programs must be carefully reviewed in order to determine appropriate investments to support this transition. This report investigates the feasibility of and options for modifying an existing utility load management system so that it might provide reliability services (i.e. ancillary services) in the competitive markets that have resulted from electricity industry restructuring. The report is a case study of Southern California Edison's (SCE) load management programs. SCE was chosen because it operates one of the largest load management programs in the country and it operates them within a competitive wholesale electricity market. The report describes a wide range of existing and soon-to-be-available communication, control, and metering technologies that could be used to facilitate the evolution of SCE's load management programs and systems to provision of reliability services. The fundamental finding of this report is that, with modifications, SCE's load management infrastructure could be transitioned to provide critical ancillary services in competitive electricity markets, employing currently or soon-to-be available load control technologies.

  14. Magnetic field dependence of the entanglement entropy of one dimensional spin systems in quantum phase transition induced by a quench

    E-Print Network [OSTI]

    Banasri Basu; Pratul Bandyopadhyay; Priyadarshi Majumdar

    2012-07-10T23:59:59.000Z

    We study the magnetic field dependence of the entanglement entropy in quantum phase transition induced by a quench of the XX, XXX and the LMG model. The entropy for a block of $L$ spins with the rest follows a logarithmic scaling law where the block size $L$ is restricted due to the dependence of the prefactor on the quench time. Within this restricted region the entropy undergoes a renormalization group (RG) flow. From the RG flow equation we have analytically determined the magnetic field dependence of the entropy. The anisotropy parameter dependence of the entropy for the XY and the LMG model has also been studied in this framework. The results are found to be in excellent agreement with that obtained by other authors from numerical studies without any quench.

  15. Can xenon in water inhibit ice growth? Molecular dynamics of phase transitions in water$-$Xe system

    E-Print Network [OSTI]

    Vasilii I. Artyukhov; Alexander Yu. Pulver; Alex Peregudov; Igor Artyuhov

    2014-07-11T23:59:59.000Z

    Motivated by recent experiments showing the promise of noble gases as cryoprotectants, we perform molecular dynamics modeling of phase transitions in water with xenon under cooling. We study the structure and dynamics of xenon water solution as a function of temperature. Homogeneous nucleation of clathrate hydrate phase is observed and characterized. As the temperature is further reduced we observe hints of dissociation of clathrate due to stronger hydrophobic hydration, pointing towards a possible instability of clathrate at cryogenic temperatures and conversion to an amorphous phase comprised of "xenon + hydration shell" Xe$\\cdot$(H$_{2}$O)$_{21.5}$ clusters. Simulations of ice$-$xenon solution interface in equilibrium and during ice growth reveal the effects of xenon on the ice$-$liquid interface, where adsorbed xenon causes roughening of ice surface but does not preferentially form clathrate. These results provide evidence against the ice-blocker mechanism of xenon cryoprotection.

  16. Finite temperature spin-dynamics and phase transitions in spin-orbital models

    SciTech Connect (OSTI)

    Chen, C.-C.

    2010-04-29T23:59:59.000Z

    We study finite temperature properties of a generic spin-orbital model relevant to transition metal compounds, having coupled quantum Heisenberg-spin and Ising-orbital degrees of freedom. The model system undergoes a phase transition, consistent with that of a 2D Ising model, to an orbitally ordered state at a temperature set by short-range magnetic order. At low temperatures the orbital degrees of freedom freeze-out and the model maps onto a quantum Heisenberg model. The onset of orbital excitations causes a rapid scrambling of the spin spectral weight away from coherent spin-waves, which leads to a sharp increase in uniform magnetic susceptibility just below the phase transition, reminiscent of the observed behavior in the Fe-pnictide materials.

  17. Kepler-18b, c, and d: A system of three planets confirmed by transit timing variations, light curve validation, Warm-Spitzer photometry, and radial velocity measurements

    E-Print Network [OSTI]

    Seager, Sara

    We report the detection of three transiting planets around a Sun-like star, which we designate Kepler-18. The transit signals were detected in photometric data from the Kepler satellite, and were confirmed to arise from ...

  18. Density of defects and the scaling law of the entanglement entropy in quantum phase transition of one dimensional spin systems induced by a quench

    E-Print Network [OSTI]

    Banasri Basu; Pratul Bandyopadhyay; Priyadarshi Majumdar

    2011-03-07T23:59:59.000Z

    We have studied quantum phase transition induced by a quench in different one dimensional spin systems. Our analysis is based on the dynamical mechanism which envisages nonadiabaticity in the vicinity of the critical point. This causes spin fluctuation which leads to the random fluctuation of the Berry phase factor acquired by a spin state when the ground state of the system evolves in a closed path. The two-point correlation of this phase factor is associated with the probability of the formation of defects. In this framework, we have estimated the density of defects produced in several one dimensional spin chains. At the critical region, the entanglement entropy of a block of $L$ spins with the rest of the system is also estimated which is found to increase logarithmically with $L$. The dependence on the quench time puts a constraint on the block size $L$. It is also pointed out that the Lipkin-Meshkov-Glick model in point-splitting regularized form appears as a combination of the XXX model and Ising model with magnetic field in the negative z-axis. This unveils the underlying conformal symmetry at criticality which is lost in the sharp point limit. Our analysis shows that the density of defects as well as the scaling behavior of the entanglement entropy follows a universal behavior in all these systems.

  19. Density of defects and the scaling law of the entanglement entropy in quantum phase transition of one-dimensional spin systems induced by a quench

    SciTech Connect (OSTI)

    Basu, Banasri; Bandyopadhyay, Pratul; Majumdar, Priyadarshi [Physics and Applied Mathematics Unit, Indian Statistical Institute, Kolkata 700 108 (India); Jyotinagar Bidyasree Niketan H.S. School, 41 Jyotinagar, Kolkata 700 108 (India)

    2011-03-15T23:59:59.000Z

    We have studied quantum phase transition induced by a quench in different one-dimensional spin systems. Our analysis is based on the dynamical mechanism which envisages nonadiabaticity in the vicinity of the critical point. This causes spin fluctuation which leads to the random fluctuation of the Berry phase factor acquired by a spin state when the ground state of the system evolves in a closed path. The two-point correlation of this phase factor is associated with the probability of the formation of defects. In this framework, we have estimated the density of defects produced in several one-dimensional spin chains. At the critical region, the entanglement entropy of a block of L spins with the rest of the system is also estimated which is found to increase logarithmically with L. The dependence on the quench time puts a constraint on the block size L. It is also pointed out that the Lipkin-Meshkov-Glick model in point-splitting regularized form appears as a combination of the XXX model and Ising model with magnetic field in the negative z axis. This unveils the underlying conformal symmetry at criticality which is lost in the sharp point limit. Our analysis shows that the density of defects as well as the scaling behavior of the entanglement entropy follows a universal behavior in all these systems.

  20. Symmetry and singularities in a low-dimensional model of a complex system. A back door approach to the physics of LH transitions

    E-Print Network [OSTI]

    Dewar, Robert L.

    and energy losses. A major area of plasma research ever since has been to understand why this transition

  1. Solid state rapid thermocycling

    DOE Patents [OSTI]

    Beer, Neil Reginald; Spadaccini, Christopher

    2014-05-13T23:59:59.000Z

    The rapid thermal cycling of a material is targeted. A solid state heat exchanger with a first well and second well is coupled to a power module. A thermoelectric element is coupled to the first well, the second well, and the power module, is configured to transfer thermal energy from the first well to the second well when current from the power module flows through the thermoelectric element in a first direction, and is configured to transfer thermal energy from the second well to the first well when current from the power module flows through the thermoelectric element in a second direction. A controller may be coupled to the thermoelectric elements, and may switch the direction of current flowing through the thermoelectric element in response to a determination by sensors coupled to the wells that the amount of thermal energy in the wells falls below or exceeds a pre-determined threshold.

  2. Transition dynamics between the multiple steady states in natural ventilation systems : from theories to applications in optimal controls

    E-Print Network [OSTI]

    Yuan, Jinchao

    2007-01-01T23:59:59.000Z

    In this study, we investigated the multiple steady state behavior, an important observation in numerical and experimental studies in natural ventilation systems. The-oretical models are developed and their applications in ...

  3. Transition from participant to spectator fragmentation in Au+Au reaction between 60 AMeV and 150 AMeV

    E-Print Network [OSTI]

    Zbiri, K; Aichelin, J; Reisdorf, W; Gulminelli, F; Lynen, U; Müller, W F J; Orth, H; Schwarz, C; Sfienti, C; Trautmann, W; Turzó, K; Zwieglinski, B; Auger, G; Charvet, J L; Chbihi, A; Dayras, R; Durand, D; Frankland, J D; Legrain, R; Le Neindre, N; López, O; Nalpas, L; Pârlog, M; Rivet, M F; Rosato, E; Vient, E; Vigilante, M; Volant, C; Wieleczko, J P

    2006-01-01T23:59:59.000Z

    Using the quantum molecular dynamics approach, we analyze the results of the recent INDRA Au+Au experiments at GSI in the energy range between 60 AMeV and 150 AMeV. It turns out that in this energy region the transition toward a participant-spectator scenario takes place. The large Au+Au system displays in the simulations as in the experiment simultaneously dynamical and statistical behavior which we analyze in detail: The composition of fragments close to midrapidity follows statistical laws and the system shows bi-modality, i.e. a sudden transition between different fragmentation pattern as a function of the centrality as expected for a phase transition. The fragment spectra at small and large rapidities, on the other hand, are determined by dynamics and the system as a whole does not come to equilibrium, an observation which is confirmed by FOPI experiments for the same system.

  4. Phase transition towards strange matter

    E-Print Network [OSTI]

    F. Gulminelli; Ad. R. Raduta; M. Oertel

    2012-08-31T23:59:59.000Z

    The phase diagram of a system constituted of neutrons and $\\Lambda$-hyperons in thermal equilibrium is evaluated in the mean-field approximation. It is shown that this simple system exhibits a complex phase diagram with first and second order phase transitions. Due to the generic presence of attractive and repulsive couplings, the existence of phase transitions involving strangeness appears independent of the specific interaction model. In addition we will show under which conditions a phase transition towards strange matter at high density exists, which is expected to persist even within a complete treatment including all the different strange and non- strange baryon states. The impact of this transition on the composition of matter in the inner core of neutron stars is discussed.

  5. Stray Current Corrosion in Electrified Rail Systems --Final Report Dr. Thomas J. Barlo, formerly of Northwestern University

    E-Print Network [OSTI]

    Stray Current Corrosion in Electrified Rail Systems -- Final Report Dr. Thomas J. Barlo, formerly SUMMARY Despite a relatively mature technology for its control, corrosion caused by stray current from of that cost is the result of corrosion of the electrified rapid-transit system itself, and part is the result

  6. Transition between Two Oscillation Modes

    E-Print Network [OSTI]

    Ricardo Lopez-Ruiz; Yves Pomeau

    2002-05-17T23:59:59.000Z

    A model for the symmetric coupling of two self-oscillators is presented. The nonlinearities cause the system to vibrate in two modes of different symmetries. The transition between these two regimes of oscillation can occur by two different scenarios. This might model the release of vortices behind circular cylinders with a possible transition from a symmetric to an antisymmetric Benard-von Karman vortex street.

  7. Rapid prototyping applications for manufacturing

    SciTech Connect (OSTI)

    Atwood, C.L.; Maguire, M.C.; Pardo, B.T.; Bryce, E.A. [Sandia National Labs., Albuquerque, NM (United States)

    1996-01-01T23:59:59.000Z

    Recent advances in stereolithography and selective laser sintering have had a significant impact on the overall quality of parts produced using these rapid prototyping processes. The development and implementation of 3D System`s QuickCast{sup TM} resin and software for building investment casting patterns have proven to be major steps toward fabricating highly accurate patterns with very good surface finishes. As participants in the Beta test program for QuickCast{sup TM} resin and software, we experienced a steep learning curve and were able to build accurate parts in a short period of time. It is now possible using this technology to produce highly accurate prototype parts as well as acceptable first article and small lot size production parts. We use the Selective Laser Sintering (SLS) process to fabricate prototype wax patterns for investment casting. DTM Corporation recently introduced the use of their polycarbonate material for fabricating investment casting patterns. The polycarbonate material is processed significantly faster with improved strength, dimensional stability, and without a support structure during the build process. Sandia is currently changing from investment casting wax to polycarbonate for the fabrication of investment casting patterns using the SLS process. This report will focus on our successes with these new materials from the standpoints of application, accuracy, surface finish, and post processing. Also presented will be examples of parts manufactured by these processes. 6 refs., 10 figs.

  8. Rapid Scan Humidified Growth Cloud Condensation Nuclei Counter

    SciTech Connect (OSTI)

    Gregory L. Kok; Athanasios Nenes

    2013-03-13T23:59:59.000Z

    This research focused on enhancements to the streamwise thermal gradient cloud condensation nuclei counter to support the rapid scan mode and to enhance the capability for aerosol humidified growth measurements. The research identified the needs for flow system modifications and range of capability for operating the conventional instrument in the rapid scan and humidified growth modes.

  9. White Paper for U.S. Army Rapid Equipping Force: Waste Heat Recovery with Thermoelectric and Lithium-Ion Hybrid Power System

    SciTech Connect (OSTI)

    Farmer, J C

    2007-11-26T23:59:59.000Z

    By harvesting waste heat from engine exhaust and storing it in light-weight high-capacity modules, it is believed that the need for energy transport by convoys can be lowered significantly. By storing this power during operation, substantial electrical power can be provided during long periods of silent operation, while the engines are not operating. It is proposed to investigate the potential of installing efficient thermoelectric generators on the exhaust systems of trucks and other vehicles to generate electrical power from the waste heat contained in the exhaust and to store that power in advanced power packs comprised of polymer-gel lithium ion batteries. Efficient inexpensive methods for production of the thermoelectric generator are also proposed. The technology that exists at LLNL, as well as that which exists at industrial partners, all have high technology readiness level (TRL). Work is needed for integration and deployment.

  10. Sm Transition Probabilities and Abundances

    E-Print Network [OSTI]

    J. E. Lawler; E. A. Den Hartog; C. Sneden; J. J. Cowan

    2005-10-19T23:59:59.000Z

    Radiative lifetimes, accurate to +/- 5%, have been measured for 212 odd-parity levels of Sm II using laser-induced fluorescence. The lifetimes are combined with branching fractions measured using Fourier-transform spectrometry to determine transition probabilities for more than 900 lines of Sm II. This work is the largest-scale laboratory study to date of Sm II transition probabilities using modern methods. This improved data set has been used to determine a new solar photospheric Sm abundance, log epsilon = 1.00 +/- 0.03, from 26 lines. The spectra of three very metal-poor, neutron-capture-rich stars also have been analyzed, employing between 55 and 72 Sm II lines per star. The abundance ratios of Sm relative to other rare earth elements in these stars are in agreement, and are consistent with ratios expected from rapid neutron-capture nucleosynthesis (the r-process).

  11. 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 state transitions...

  12. Energy level statistics in the transition regime between integrability and chaos for systems with broken antiunitary symmetry

    E-Print Network [OSTI]

    Marko Robnik; Jure Dobnikar; Tomaz Prosen

    1997-11-10T23:59:59.000Z

    Energy spectra of a particle with mass $m$ and charge $e$ in the cubic Aharonov-Bohm billiard containing around $10^4$ consecutive levels starting from the ground state have been analysed. The cubic Aharonov-Bohm billiard is a plane billiard defined by the cubic conformal mapping of the unit disc pervaded by a point magnetic flux through the origin perpendicular to the plane of the billiard. The magnetic flux does not influence the classical dynamics, but breaks the antiunitary symmetry in the system, which affects the statistics of energy levels. By varying the shape parameter $\\lam$ the classical dynamics goes from integrable ($\\lam =0$) to fully chaotic ($\\lam = 0.2$; Africa billiard). The level spacing distribution $P(S)$ and the number variance $\\Sigma^{2}(L)$ have been studied for 13 different shape parameters on the interval ($0\\le\\lam\\le0.2$). GUE statistics has proven correct for completely chaotic case, while in the mixed regime the fractional power law level repulsion has been observed. The exponent of the level repulsion has been analysed and is found to change smoothly from 0 to 2 as the dynamics goes from integrable to ergodic. Further on, the semiclassical Berry-Robnik theory has been examined. We argue that the semiclassical regime has not been reached and give an estimate for the number of energy levels required for the Berry-Robnik statistics to apply.

  13. Rapid extraction of dissolved inorganic carbon from seawater and groundwater samples for radiocarbon dating

    E-Print Network [OSTI]

    Gospodinova, Kalina Doneva

    2012-01-01T23:59:59.000Z

    The focus of this thesis is the design and development of a system for rapid extraction of dissolved inorganic carbon from seawater and groundwater samples for radiocarbon dating. The Rapid Extraction of Dissolved Inorganic ...

  14. Emergency delivery of Vasopressin from an implantable MEMS rapid drug delivery device

    E-Print Network [OSTI]

    Ho Duc, Hong Linh, 1978-

    2009-01-01T23:59:59.000Z

    An implantable rapid drug delivery device based on micro-electro-mechanical systems (MEMS) technology was designed, fabricated and validated for the in vivo rapid delivery of vasopressin in a rabbit model. In vitro ...

  15. Use of a Diesel Fuel Processor for Rapid and Efficient Regeneration...

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

    Use of a Diesel Fuel Processor for Rapid and Efficient Regeneration of Single Leg NOx Adsorber Systems Use of a Diesel Fuel Processor for Rapid and Efficient Regeneration of Single...

  16. Finding Transition Pathways on Manifolds

    E-Print Network [OSTI]

    Tiejun Li; Xiaoguang Li; Xiang Zhou

    2014-08-13T23:59:59.000Z

    We consider noise-induced transition paths in randomly perturbed dynami- cal systems on a smooth manifold. The classical Freidlin-Wentzell large devia- tion theory in Euclidean spaces is generalized and new forms of action functionals are derived in the spaces of functions and the space of curves to accommodate the intrinsic constraints associated with the manifold. Numerical meth- ods are proposed to compute the minimum action paths for the systems with constraints. The examples of conformational transition paths for a single and double rod molecules arising in polymer science are numerically investigated.

  17. Superradiance Transition in Graphene

    E-Print Network [OSTI]

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

    2015-06-04T23:59:59.000Z

    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.

  18. Superradiance Transition in Graphene

    E-Print Network [OSTI]

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

    2015-06-12T23:59:59.000Z

    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.

  19. Doppler-free intermodulated fluorescence spectroscopy of $^4He$ $2^3P-3^{1,3}D$ transitions at 588 nm with a one-watt compact laser system

    E-Print Network [OSTI]

    Luo, Pei-Ling; Feng, Yan; Wang, Li-Bang; Shy, Jow-Tsong

    2015-01-01T23:59:59.000Z

    We have demonstrated Doppler-free intermodulated fluorescence spectroscopy of helium $2^3P-3^{1,3}D$ transitions in an rf discharged sealed-off cell using a compact laser system at 588 nm. An external cavity diode laser at 1176 nm was constructed to seed a Raman fiber amplifier. Laser power of more than one watt at 588 nm was produced by frequency doubling of the fiber amplifier output using a MgO:PPLN crystal. A doubling efficiency of 23 % was achieved. The power-dependent spectra of the $2^3P-3^3D$ transitions were investigated. Furthermore, the Doppler-free spectrum of the spin-forbidden $2^3P-3^1D$ transitions was observed for the first time. Our results are crucial towards precision test of QED atomic calculations, especially for improving the determination of the helium $3^1D-3^3D$ separation.

  20. Automated rapid thermal imaging systems technology

    E-Print Network [OSTI]

    Phan, Long N., 1976-

    2012-01-01T23:59:59.000Z

    A major source of energy savings occurs on the thermal envelop of buildings, which amounts to approximately 10% of annual energy usage in the United States. To pursue these savings, energy auditors use closed loop energy ...

  1. Rapid prototyping of green composites

    E-Print Network [OSTI]

    Peek, Nadya (Nadya Meile)

    2010-01-01T23:59:59.000Z

    Rapid prototyping employs digital fabrication techniques to quickly manufacture parts. However, the available materials are not yet suitable for making strong, large or durable objects. Composites are materials which are ...

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

    E-Print Network [OSTI]

    Leven, Dalia (Dalia Beth)

    2006-01-01T23:59:59.000Z

    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 ...

  3. Rapidity resummation for $B$-meson wave functions

    E-Print Network [OSTI]

    Yue-Long Shen; Yu-Ming Wang

    2014-09-03T23:59:59.000Z

    Transverse-momentum dependent (TMD) hadronic wave functions develop light-cone divergences under QCD corrections, which are commonly regularized by the rapidity $\\zeta$ of gauge vector defining the non-light-like Wilson lines. The yielding rapidity logarithms from infrared enhancement need to be resummed for both hadronic wave functions and short-distance functions, to achieve scheme-independent calculations of physical quantities. We briefly review the recent progress on the rapidity resummation for $B$-meson wave functions which are the key ingredients of TMD factorization formulae for radiative-leptonic, semi-leptonic and non-leptonic $B$-meson decays. The crucial observation is that rapidity resummation induces a strong suppression of $B$-meson wave functions at small light-quark momentum, strengthening the applicability of TMD factorization in exclusive $B$-meson decays. The phenomenological consequence of rapidity-resummation improved $B$-meson wave functions is further discussed in the context of $B \\to \\pi$ transition form factors at large hadronic recoil.

  4. Rapid Risk Assessment: FY05 Annual Summary Report

    SciTech Connect (OSTI)

    Whelan, Gene; Millard, W. David; Gelston, Gariann M.; Pelton, Mitch A.; Yang, Zhaoqing; Strenge, Dennis L.; Lee, Cheegwan; Sivaraman, Chitra; Simpson, Mary J.; Young, Joan K.; Khangaonkar, Tarang P.; Downing, Timothy R.; Hoopes, Bonnie L.; Hachmeister, Lon E.

    2006-03-06T23:59:59.000Z

    The Pacific Northwest National Laboratory (PNNL) is developing decision support tools that will assist in the transition of incident information into Protective Action Recommendations (PARs) that are understandable and can be executed in a real-world, operational environment. During emergencies, responders must rapidly assess risks and decide on the best course of action—all within minutes to hours. PNNL is blending existing modeling and decision support technology to develop new methods for transitioning science-based threat assessment to PARs. The rapid risk assessment tool will be both understandable and applicable to the emergency management community and would be a valuable tool during any water security-related incident. In 2005, PNNL demonstrated the integration of the multi-thematic modeling with emergency management decision support tools to create a Rapid Risk Assessment (RRA) tool that will transition risk to PARs that assist in responding to or mitigating the direct and indirect impacts of the incident(s). The RRA tool does this by aligning multi-thematic modeling capabilities with real-world response zones established by emergency and site operations managers. The RRA tool uses the risk assessment tool to drive prognostic models that use the type of incident, time of impact, severity of impact, and duration of impact to select the most appropriate PAR. Because PARs (and the thresholds by which they are selected) are jointly established by the technologists and the emergency management and operations decision makers, the science-based risk assessment can transition into a recommendation that can be understood and executed by people in the field.

  5. Energy Transition Initiative: Islands Playbook (Book)

    SciTech Connect (OSTI)

    Not Available

    2015-01-01T23:59:59.000Z

    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.

  6. Method for dry etching of transition metals

    DOE Patents [OSTI]

    Ashby, Carol I. H. (Edgewood, NM); Baca, Albert G. (Albuquerque, NM); Esherick, Peter (Albuquerque, NM); Parmeter, John E. (Albuquerque, NM); Rieger, Dennis J. (Tijeras, NM); Shul, Randy J. (Albuquerque, NM)

    1998-01-01T23:59:59.000Z

    A method for dry etching of transition metals. The method for dry etching of a transition metal (or a transition metal alloy such as a silicide) on a substrate comprises providing at least one nitrogen- or phosphorous-containing .pi.-acceptor ligand in proximity to the transition metal, and etching the transition metal to form a volatile transition metal/.pi.-acceptor ligand complex. The dry etching may be performed in a plasma etching system such as a reactive ion etching (RIE) system, a downstream plasma etching system (i.e. a plasma afterglow), a chemically-assisted ion beam etching (CAIBE) system or the like. The dry etching may also be performed by generating the .pi.-acceptor ligands directly from a ligand source gas (e.g. nitrosyl ligands generated from nitric oxide), or from contact with energized particles such as photons, electrons, ions, atoms, or molecules. In some preferred embodiments of the present invention, an intermediary reactant species such as carbonyl or a halide ligand is used for an initial chemical reaction with the transition metal, with the intermediary reactant species being replaced at least in part by the .pi.-acceptor ligand for forming the volatile transition metal/.pi.-acceptor ligand complex.

  7. 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

    2006-01-01T23:59:59.000Z

    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 ...

  8. 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)

    2014-05-15T23:59:59.000Z

    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.

  9. Gas turbine combustor transition

    DOE Patents [OSTI]

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

    1999-01-01T23:59:59.000Z

    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.

  10. Gas turbine combustor transition

    DOE Patents [OSTI]

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

    1999-05-25T23:59:59.000Z

    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.

  11. Biomass Rapid Analysis Network (BRAN)

    SciTech Connect (OSTI)

    Not Available

    2003-10-01T23:59:59.000Z

    Helping the emerging biotechnology industry develop new tools and methods for real-time analysis of biomass feedstocks, process intermediates and The Biomass Rapid Analysis Network is designed to fast track the development of modern tools and methods for biomass analysis to accelerate the development of the emerging industry. The network will be led by industry and organized and coordinated through the National Renewable Energy Lab. The network will provide training and other activities of interest to BRAN members. BRAN members will share the cost and work of rapid analysis method development, validate the new methods, and work together to develop the training for the future biomass conversion workforce.

  12. 309 Building transition plan

    SciTech Connect (OSTI)

    Graves, C.E.

    1994-08-31T23:59:59.000Z

    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.

  13. Method and apparatus for rapid stopping and starting of a thermoacoustic engine

    DOE Patents [OSTI]

    Swift, Gregory W.; Backhaus, Scott N.; Gardner, David L.

    2003-11-11T23:59:59.000Z

    A thermoacoustic engine-driven system with a hot heat exchanger, a regenerator or stack, and an ambient heat exchanger includes a side branch load for rapid stopping and starting, the side branch load being attached to a location in the thermoacoustic system having a nonzero oscillating pressure and comprising a valve, a flow resistor, and a tank connected in series. The system is rapidly stopped simply by opening the valve and rapidly started by closing the valve.

  14. Tips for Transition

    E-Print Network [OSTI]

    Kellems, Ryan Owen; Morningstar, Mary E.

    2010-01-01T23:59:59.000Z

    The article focuses on the best practices solicited by the Division on Career Development & Transition (DCDT) for the student to adult life transition planning for youth with disabilities. The DCDT launched an effort to identify field...

  15. Rapid and robust spin state amplification

    E-Print Network [OSTI]

    Tom Close; Femi Fadugba; Simon C. Benjamin; Joseph Fitzsimons; Brendon W. Lovett

    2011-05-24T23:59:59.000Z

    Electron and nuclear spins have been employed in many of the early demonstrations of quantum technology (QT). However applications in real world QT are limited by the difficulty of measuring single spins. Here we show that it is possible to rapidly and robustly amplify a spin state using a lattice of ancillary spins. The model we employ corresponds to an extremely simple experimental system: a homogenous Ising-coupled spin lattice in one, two or three dimensions, driven by a continuous microwave field. We establish that the process can operate at finite temperature (imperfect initial polarisation) and under the effects of various forms of decoherence.

  16. Phase transition in linear sigma model and disoriented chiral condensate

    E-Print Network [OSTI]

    A. K. Chaudhuri

    2000-07-28T23:59:59.000Z

    We have investigated the phase transition and disoriented chiral condensate domain formation in linear sigma model. Solving the equation of motion for the sigma model fields in contact with a heat bath, we have shown that the fields undergo phase transition above a certain critical temperature(T_c). It was also shown that when the fields thermalised at temperature above T_c are cooled down sufficiently rapidly, disoriented chiral condensate domains are formed quite late in the evolution.

  17. One-particle transition.

    E-Print Network [OSTI]

    Adler, Joan

    One-particle di#11;usional model to mimic some properties of glass transition. Sorkin A.V., Ivanov #15; Computer studies of glass transition #15; Model and simulations #15; Results #15; Conclusions 2 #12; Introduction In recent time many properties of glass transitions have been investigated

  18. Light Rail Transit Strengthening

    E-Print Network [OSTI]

    Minnesota, University of

    Light Rail Transit Improving mobility Easing congestion Strengthening our communities Central Corridor Communicating to the Public During Major Construction May 25, 2011 #12;2 Light Rail Transit;Light Rail Transit Central Corridor Route and Stations 3 · 18 new stations · 9.8 miles of new double

  19. "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

  20. E-Print Network 3.0 - automated rapid chemistry Sample Search...

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

    more rapidly screen large numbers of samples and identify the most promising biomass feedstocks for higher efficiency and lower cost bio- Summary: innovati n This new system...

  1. Articulated transition duct in turbomachine

    DOE Patents [OSTI]

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

    2014-04-29T23:59:59.000Z

    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.

  2. Phase Transition and dissipation driven budding in lipid vesicles

    E-Print Network [OSTI]

    Thomas Franke; Christian T. Leirer; Achim Wixforth; Nily Dan; Matthias F. Schneider

    2013-03-26T23:59:59.000Z

    Membrane budding has been extensively studied as an equilibrium process attributed to the formation of coexisting domains or changes in the vesicle area to volume ratio (reduced volume). In contrast, non-equilibrium budding remains experimentally widely unexplored especially when time scales fall well below the characteristic diffusion time of lipids{\\tau} . We show that localized mechanical perturbations, initiated by driving giant unilamellar vesicles (GUVs) through their lipid phase transition, leads to the immediate formation of rapidly growing, multiply localized, non-equilibrium buds, when the transition takes place at short timescales (<{\\tau}). We show that these buds arise from small fluid-like perturbations and grow as spherical caps in the third dimension, since in plane spreading is obstructed by the continuous rigid gel-like matrix. Accounting for both three and two dimensional viscosity, we demonstrate that dissipation decreases the size scale of the system and therefore favours the formation of multiple buds as long as the perturbation takes place above a certain critical rate. This rate depends on membrane and media viscosity and is qualitatively and quantitatively correctly predicted by our theoretical description.

  3. Equations of state and phase transitions in stellar matter

    SciTech Connect (OSTI)

    Raduta, Ad. R. [IFIN-HH, Bucharest POB-MG 6 (Romania); Gulminelli, F.; Aymard, F. [CNRS, UMR6534, LPC and ENSICAEN, UMR6534, LPC, F-14050 Caen cedex (France); Oertel, M. [LUTH, CNRS, Observatoire de Paris, Universite Paris Diderot, 92195 Meudon (France); Margueron, J. [IPN, IN2P3-CNRS, Universite Paris-Sud, F-91406 Orsay cedex (France)

    2014-05-09T23:59:59.000Z

    Realistic description of core-collapsing supernovae evolution and structure of proto-neutron stars chiefly depends on microphysics input in terms of equations of state, chemical composition and weak interaction rates. At sub-saturation densities the main uncertainty comes from the symmetry energy. Within a nuclear statistical equilibrium (NSE) model with consistent treatment of clusterized and unbound components we investigate the meaning of symmetry energy in the case of dis-homogeneous systems, as the one thought to constitute the neutron star crust, and its sensitivity to the isovector properties of the effective interaction. At supra-saturation densities the situation is much more difficult because of the poor knowledge of nucleon-hyperon and hyperon-hyperon interactions and thermodynamic behavior in terms of phase transitions. Within a simple (np?) model we show that compressed baryonic matter with strangeness manifests a complex phase diagram with first and second order phase transitions. The fact that both are explored under strangeness chemical equilibrium and survive Coulomb suggests that they might have sizable consequences on star evolution. An example in this sense is the drastic reduction of the neutrino-mean free path in the vicinity of the critical point obtained within RPA which would lead to a less rapid star cooling.

  4. Geometrical Rabi transitions between decoupled quantum states

    E-Print Network [OSTI]

    Xingxiang Zhou; Ari Mizel

    2008-09-17T23:59:59.000Z

    A periodic perturbation such as a laser field cannot induce transitions between two decoupled states for which the transition matrix element vanishes. We show, however, that if in addition some system parameters are varied adiabatically, such transitions become possible via adiabatic-change-induced excitations to other states. We demonstrate that full amplitude transfer between the two decoupled states can be achieved, and more significantly, the evolution of the system only depends on its path in parameter space. Our technique then provides a valuable means of studying nontrivial geometrical dynamics via auxiliary states with large energy splittings.

  5. HAT-P-44b, HAT-P-45b, AND HAT-P-46b: THREE TRANSITING HOT JUPITERS IN POSSIBLE MULTI-PLANET SYSTEMS

    E-Print Network [OSTI]

    Hartman, J. D.

    We report the discovery by the HATNet survey of three new transiting extrasolar planets orbiting moderately bright (V = 13.2, 12.8, and 11.9) stars. The planets have orbital periods of 4.3012, 3.1290, and 4.4631 days, ...

  6. Scaling of entanglement close to a quantum phase transition

    E-Print Network [OSTI]

    Dorlas, Teunis C.

    to a quantum phase transition A. Osterloh*, Luigi Amico*, G. Falci* & Rosario Fazio * Dipartimento di ............................................................................................................................................................................. Classical phase transitions occur when a physical system reaches a state below a critical temperature characterized by macroscopic order1 . Quantum phase transitions occur at absolute zero; they are induced

  7. Transitioning Applications to Ontologies http://www.tao-project.eu

    E-Print Network [OSTI]

    Bontcheva, Kalina

    Transitioning Applications to Ontologies http://www.tao-project.eu TAO Transitioning Applications to Ontologies The goal of the TAO project is to define a low-cost route to transitioning legacy systems will be validated in two high-profile case studies: a comprehensive open source platform (with thousands of users

  8. Rapidity-Dependent Jet Vetoes

    E-Print Network [OSTI]

    Shireen Gangal; Maximilian Stahlhofen; Frank J. Tackmann

    2014-12-15T23:59:59.000Z

    Jet vetoes are a prominent part of the signal selection in various analyses at the LHC. We discuss jet vetoes for which the transverse momentum of a jet is weighted by a smooth function of the jet rapidity. With a suitable choice of the rapidity-weighting function, such jet-veto variables can be factorized and resummed allowing for precise theory predictions. They thus provide a complementary way to divide phase space into exclusive jet bins. In particular, they provide a natural and theoretically clean way to implement a tight veto on central jets with the veto constraint getting looser for jets at increasingly forward rapidities. We mainly focus our discussion on the 0-jet case in color-singlet processes, using Higgs production through gluon fusion as a concrete example. For one of our jet-veto variables we compare the resummed theory prediction at NLL'+NLO with the recent differential cross section measurement by the ATLAS experiment in the $H\\to\\gamma\\gamma$ channel, finding good agreement. We also propose that these jet-veto variables can be measured and tested against theory predictions in other SM processes, such as Drell-Yan, diphoton, and weak diboson production.

  9. The Physics of the Colloidal Glass Transition

    E-Print Network [OSTI]

    Gary L. Hunter; Eric R. Weeks

    2011-12-20T23:59:59.000Z

    As one increases the concentration of a colloidal suspension, the system exhibits a dramatic increase in viscosity. Structurally, the system resembles a liquid, yet motions within the suspension are slow enough that it can be considered essentially frozen. This kinetic arrest is the colloidal glass transition. For several decades, colloids have served as a valuable model system for understanding the glass transition in molecular systems. The spatial and temporal scales involved allow these systems to be studied by a wide variety of experimental techniques. The focus of this review is the current state of understanding of the colloidal glass transition. A brief introduction is given to important experimental techniques used to study the glass transition in colloids. We describe features of colloidal systems near and in glassy states, including tremendous increases in viscosity and relaxation times, dynamical heterogeneity, and ageing, among others. We also compare and contrast the glass transition in colloids to that in molecular liquids. Other glassy systems are briefly discussed, as well as recently developed synthesis techniques that will keep these systems rich with interesting physics for years to come.

  10. SimHydro 2014:Modelling of rapid transitory flows,11-13 June 2014, Sophia Antipolis Marechal E., Khelladi S., Ravelet F., Delepierre-Massue O,. Bakir F Towards numerical simulation of snow showersin jet-engine fuel systems.

    E-Print Network [OSTI]

    Boyer, Edmond

    uncontrollably if icing occurs on the horizontal or vertical stabilizer. Obstruction of pitot tube will causeSimHydro 2014:Modelling of rapid transitory flows,11-13 June 2014, Sophia Antipolis ­Marechal E at low temperatures. If the flow rate is increased, sudden releases of large quantities of ice may occur

  11. Pulse control of sudden transition for two qubits in XY spin baths and quantum phase transition

    E-Print Network [OSTI]

    Da-Wei Luo; Hai-Qing Lin; Jing-Bo Xu; Dao-Xin Yao

    2011-11-03T23:59:59.000Z

    We study the dynamics of two initially correlated qubits coupled to their own separate spin baths modeled by a XY spin chain and find the explicit expression of the quantum discord for the system. A sudden transition is found to exist between classical and quantum decoherence by choosing certain initial states. We show that the sudden transition happens near the critical point, which provides a new way to characterize the quantum phase transition. Furthermore, we propose a scheme to prolong the transition time of the quantum discord by applying the bang-bang pulses.

  12. Arctic sea ice declined rapidly to unprec-edented low extents in the summer of 2007,

    E-Print Network [OSTI]

    Clements, Craig

    Arctic sea ice declined rapidly to unprec- edented low extents in the summer of 2007, raising concern that the Arctic may be on the verge of a fundamental transition toward a seasonal ice cover. Arctic sea ice extent typically attains a seasonal maximum in March and minimum in September. Over

  13. Transitions in the quantum computational power

    E-Print Network [OSTI]

    Tzu-Chieh Wei; Ying Li; Leong Chuan Kwek

    2014-05-16T23:59:59.000Z

    We construct two spin models on lattices (both two and three-dimensional) to study the capability of quantum computational power as a function of temperature and the system parameter. There exists a finite region in the phase diagram such that the thermal equilibrium states are capable of providing a universal fault-tolerant resource for measurement-based quantum computation. Moreover, in such a region the thermal resource states on the 3D lattices can enable topological protection for quantum computation. The two models behave similarly in terms of quantum computational power. However, they have different properties in terms of the usual phase transitions. The first model has a first-order phase transition only at zero temperature whereas there is no transition at all in the second model. Interestingly, the transition in the quantum computational power does not coincide with the phase transition in the first model.

  14. Hydrogen Transition Infrastructure Analysis

    SciTech Connect (OSTI)

    Melendez, M.; Milbrandt, A.

    2005-05-01T23:59:59.000Z

    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.

  15. Dynamic Transitions of Surface Tension Driven Convection

    E-Print Network [OSTI]

    Henk Dijkstra; Taylan Sengul; Shouhong Wang

    2011-05-05T23:59:59.000Z

    We study the well-posedness and dynamic transitions of the surface tension driven convection in a three-dimensional (3D) rectangular box with non-deformable upper surface and with free-slip boundary conditions. It is shown that as the Marangoni number crosses the critical threshold, the system always undergoes a dynamic transition. In particular, two different scenarios are studied. In the first scenario, a single mode losing its stability at the critical parameter gives rise to either a Type-I (continuous) or a Type-II (jump) transition. The type of transitions is dictated by the sign of a computable non-dimensional parameter, and the numerical computation of this parameter suggests that a Type-I transition is favorable. The second scenario deals with the case where the geometry of the domain allows two critical modes which possibly characterize a hexagonal pattern. In this case we show that the transition can only be either a Type-II or a Type-III (mixed) transition depending on another computable non-dimensional parameter. We only encountered Type-III transition in our numerical calculations. The second part of the paper deals with the well-posedness and existence of global attractors for the problem.

  16. The nature of the glass and gel transitions in sticky spheres

    E-Print Network [OSTI]

    C. Patrick Royall; Stephen R. Williams; Hajime Tanaka

    2014-09-18T23:59:59.000Z

    Glasses and gels are the two dynamically arrested, disordered states of matter. Despite their importance, their similarities and differences remain elusive, especially at high density. We identify dynamical and structural signatures which distinguish the gel and glass transitions in a colloidal model system of hard and "sticky" spheres. Gelation is induced by crossing the gas-liquid phase-separation line and the resulting rapid densification of the colloid-rich phase leads to a sharp change in dynamics and local structure. Thus, we find that gelation is first-order-like and can occur at much higher densities than previously thought: far from being low-density networks, gels have a clear "thermodynamic" definition which nevertheless leads to a non-equilibrium state with a distinct local structure characteristic of a rapidly quenched glass. In contrast, approaching the glass transition, the dynamics slow continuously accompanied by the emergence of local five-fold symmetric structure. Our findings provide a general thermodynamic, kinetic, and structural basis upon which to distinguish gelation from vitrification.

  17. Rapid prototyping: A paradigm shift in investment casting

    SciTech Connect (OSTI)

    Atwood, C.L.; Maguire, M.C.; Baldwin, M.D.; Pardo, B.T.

    1996-09-01T23:59:59.000Z

    The quest for fabricating complex metal parts rapidly and with minimal cost has brought rapid prototyping (RP) processes to the forefront of the investment casting industry. Relatively recent advances in DTM Corporation`s selective laser sintering (SLS) and 3D Systems stereolithography (SL) processes have had a significant impact on the overall quality of patterns produced using these rapid prototyping processes. Sandia National Laboratories uses patterns generated from rapid prototyping processes to reduce the cycle time and cost of fabricating prototype and small lot production parts in support of a program called FASTCAST. The SLS process is used to fabricate patterns from materials such as investment casting wax, polycarbonate, and a new material called TrueForm PM{trademark}. With the timely introduction of each of these materials, the quality of patterns fabricated has improved. The development and implementation of SL QuickCast{trademark} software has enabled this process to produce highly accurate patterns for use in investment casting. This paper focuses on the successes with these new pattern materials and the infrastructure required to cast rapid prototyping patterns successfully. In addition, a brief overview of other applications of rapid prototyping at Sandia will be discussed.

  18. Rapid thermal processing by stamping

    DOE Patents [OSTI]

    Stradins, Pauls; Wang, Qi

    2013-03-05T23:59:59.000Z

    A rapid thermal processing device and methods are provided for thermal processing of samples such as semiconductor wafers. The device has components including a stamp (35) having a stamping surface and a heater or cooler (40) to bring it to a selected processing temperature, a sample holder (20) for holding a sample (10) in position for intimate contact with the stamping surface; and positioning components (25) for moving the stamping surface and the stamp (35) in and away from intimate, substantially non-pressured contact. Methods for using and making such devices are also provided. These devices and methods allow inexpensive, efficient, easily controllable thermal processing.

  19. Notices 20 Miles Northwest of Rapid City SD Rapid City SD 57702

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

    Notices 20 Miles Northwest of Rapid City SD Rapid City SD 57702 Landholding Agency: Agriculture Property Number: 15201410016 Status: Excess Comments: off-site removal only; 55 sq....

  20. Gauge effects on phase transitions in superconductors

    E-Print Network [OSTI]

    D. V. Shopova; T. E. Tsvetkov; D. I. Uzunov

    2007-02-14T23:59:59.000Z

    Classic and recent results for gauge effects on the properties of the normal-to-superconducting phase transition in bulk and thin film superconductors are reviewed. Similar problems in the description of other natural systems (liquid crystals, quantum field theory, early universe) are also discussed. The relatively strong gauge effects on the fluctuations of the ordering field at low spatial dimensionality D and, in particular, in thin (quasi-2D) films are considered in details. A special attention is paid to the fluctuations of the gauge field. It is shown that the mechanism in which these gauge fluctuations affect on the order of the phase transition and other phase transition properties varies with the variation of the spatial dimensionality D. The problem for the experimental confirmation of the theoretical predictions about the order of the phase transitions in gauge systems is discussed.

  1. On transition to bursting via deterministic chaos

    E-Print Network [OSTI]

    Georgi S. Medvedev

    2006-05-13T23:59:59.000Z

    We study statistical properties of the irregular bursting arising in a class of neuronal models close to the transition from spiking to bursting. Prior to the transition to bursting, the systems in this class develop chaotic attractors, which generate irregular spiking. The chaotic spiking gives rise to irregular bursting. The duration of bursts near the transition can be very long. We describe the statistics of the number of spikes and the interspike interval distributions within one burst as functions of the distance from criticality.

  2. An educated search for transiting habitable planets: (Research Note) Targetting M dwarfs with known transiting planets

    E-Print Network [OSTI]

    Seager, Sara

    Because the planets of a system form in a flattened disk, they are expected to share similar orbital inclinations at the end of their formation. The high-precision photometric monitoring of stars known to host a transiting ...

  3. Use of a Diesel Fuel Processor for Rapid and Efficient Regeneration...

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

    Use of a Diesel Fuel Processor for Rapid and Efficient Regeneration of Single Leg NOx Adsorber Systems R. Dalla Betta, J. Cizeron, D. Sheridan, T. Davis Catalytica Energy Systems...

  4. Icosahedral phase formation in rapidly quenched aluminum-ruthenium alloys

    E-Print Network [OSTI]

    Anlage, Steven

    Icosahedral phase formation in rapidly quenched aluminum- ruthenium alloys Steven M. Anlagea phases as a function of composition. We have chosen the aluminum-ruthenium alloy system because. %. The solidified alloys have been studied by electron microscopy and x-ray diffraction to determine

  5. Electropholic Transition Metal Complexes: Catalysis of Isotope Exchange. April 1, 1992 - December 3, 1996. Final Report.

    SciTech Connect (OSTI)

    Heinekey, D. Michael

    1997-04-06T23:59:59.000Z

    The central aim of this project is to exploit transition metal dihydrogen complexes to develop catalysts for isotope exchange reactions between hydrogen and substrates such as water. The authors have partially met this goal by the synthesis of novel cationic rhenium complexes of the form [Re(CO){sub 3}(PR{sub 3}){sub 2}(H{sub 2})]{sup +}. These complexes bind hydrogen somehwat more strongly than the neutral tungsten analogs but also activate the bound H{sub 2} to heterolytic cleavage. Thus rapid proton (deuteron) exchange between hydrogen and water can be achieved. An example of this reaction is the rapid formation of bound HD from the complex [Re(CO){sub 3}(PR{sub 3}){sub 2}(H{sub 2})]{sup +} and deuterium gas. Rapid incorporation of deuterium from D{sub 2}O has also been observed. In these systems, the competitive binding of water to the metal center is a drawback. The affinity of the Re center for water depends upon the nature of the phosphine ligands, with the presumably more electrophilic PPh{sub 3} complex binding water strongly and irreversibly, while the PCy{sub 3} complex binds water reversibly. These results have been published in J.Am.Chem.Soc 1994, 116, 4515 and J.Am.Chem.Soc 1997, 119, 4172.

  6. Mass-induced transition in fermion number

    SciTech Connect (OSTI)

    Aragao de Carvalho, C.; Pureza, J. M.

    1989-05-15T23:59:59.000Z

    We show that if we increase the mass of fermions in interaction with a topological (kink) scalar background in 1+1 dimensions, the fractional fermion number of the system will eventually vanish. The transition is sharp and corresponds to the disappearance of localized states from the spectrum of a Dirac operator which is exactly solvable. Possible applications to different physical systems are discussed.

  7. PHYSICAL REVIEW E 84, 051103 (2011) Microscopic theory of the jamming transition of harmonic spheres

    E-Print Network [OSTI]

    Berthier, Ludovic

    transition and its relation to the phenomenon of the glass transition observed in atomic liquids. DOI: 10 for emulsions and foams [4]. However, while the structure of dense atomic liquids is by now well understood to solid transition observed in athermal systems shares similarities with the glass transition

  8. Dynamical transitions of turing patterns.

    SciTech Connect (OSTI)

    Kaper, H. G.; Wang, S.; Yari, M.; Mathematics and Computer Science; Indiana Univ.

    2009-01-01T23:59:59.000Z

    This paper is concerned with the formation and persistence of spatiotemporal patterns in binary mixtures of chemically reacting species, where one of the species is an activator, the other an inhibitor of the chemical reaction. The system of reaction-diffusion equations is reduced to a finite system of ordinary differential equations by a variant of the centre-manifold reduction method. The reduced system fully describes the local dynamics of the original system near transition points at the onset of instability. The attractor-bifurcation theory is used to give a complete characterization of the bifurcated objects in terms of the physical parameters of the problem. The results are illustrated for the Schnakenberg model.

  9. Theorising governance and innovation in sustainable energy transitions

    E-Print Network [OSTI]

    Sussex, University of

    Theorising governance and innovation in sustainable energy transitions Matthew Lockwood, Caroline to a sustainable energy future. This paper presents a tentative, provisional framework for analysing energy system. A provisional hypothesis is that the UK's ability to make the transition to a sustainable energy system

  10. Accessibility-based transit planning

    E-Print Network [OSTI]

    Busby, Jeffrey R

    2004-01-01T23:59:59.000Z

    A method for evaluating transit planning proposals using accessibility metrics is advanced in this research. A transit-accessibility model is developed intended for use by in-house transit agency planning staff as a ...

  11. Agricultural Genotyping RAPiD Genomics is a DNA genotyping and genetic data analysis company providing tools for

    E-Print Network [OSTI]

    Jawitz, James W.

    Agricultural Genotyping RAPiD Genomics is a DNA genotyping and genetic data analysis company or animal even before the seed germinates or the animal is born. The system developed by RAPiD Genomics in parallel, at a cost of several hundred dollars per sample. RAPiD Genomics has short- ened this process

  12. Holographic Magnetic Phase Transition

    E-Print Network [OSTI]

    Gilad Lifschytz; Matthew Lippert

    2009-06-21T23:59:59.000Z

    We study four-dimensional interacting fermions in a strong magnetic field, using the holographic Sakai-Sugimoto model of intersecting D4 and D8 branes in the deconfined, chiral-symmetric parallel phase. We find that as the magnetic field is varied, while staying in the parallel phase, the fermions exhibit a first-order phase transition in which their magnetization jumps discontinuously. Properties of this transition are consistent with a picture in which some of the fermions jump to the lowest Landau level. Similarities to known magnetic phase transitions are discussed.

  13. The Potential for Using Transit Infrastructure for Air Freight Cargo Movement: Feasibility Analysis of Freight Train Operation Logistics, Phase II

    E-Print Network [OSTI]

    Lu, Xiao-Yun

    2015-01-01T23:59:59.000Z

    Figure 4-10. Predicted energy (kw/h) saving vs. Status QuoJan 2013, BART Operations Planning. [5] Base Energy Inc. ,Energy Efficiency Assessment of Bay Area Rapid Transit (

  14. Wildfire Policy in Transition Yellowstone

    E-Print Network [OSTI]

    Wildfire Policy in Transition 1910 #12;Yellowstone 1988 #12;Colorado South Canyon Fire 1994 #12;#12;Wildfire Policy in Transition 1910 #12;

  15. Superconducting Transitions in Wire Network under Spatially Modulated Magnetic Field

    E-Print Network [OSTI]

    Katsumoto, Shingo

    The nature of phase transition in artificially structured superconducting systems such as superconducting artificially structured superconducting systems]. Introduction of the checkerboard field with amplitude #12; to the ¼ 1=2 case lifts the double degeneracy

  16. 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 ...

  17. Decoherence in a dynamical quantum phase transition

    E-Print Network [OSTI]

    Sarah Mostame; Gernot Schaller; Ralf Schützhold

    2010-04-15T23:59:59.000Z

    Motivated by the similarity between adiabatic quantum algorithms and quantum phase transitions, we study the impact of decoherence on the sweep through a second-order quantum phase transition for the prototypical example of the Ising chain in a transverse field and compare it to the adiabatic version of Grovers search algorithm, which displays a first order quantum phase transition. For site-independent and site-dependent coupling strengths as well as different operator couplings, the results show that (in contrast to first-order transitions) the impact of decoherence caused by a weak coupling to a rather general environment increases with system size (i.e., number of spins/qubits). This might limit the scalability of the corresponding adiabatic quantum algorithm.

  18. Quantum Phase Transition in a Graphene Model

    E-Print Network [OSTI]

    Simon Hands; Costas Strouthos

    2008-08-20T23:59:59.000Z

    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.

  19. Developments in Planet Detection using Transit Timing Variations

    SciTech Connect (OSTI)

    Steffen, Jason H.; /Fermilab; Agol, Eric; /Washington U., Seattle, Astron. Dept.

    2006-12-01T23:59:59.000Z

    In a transiting planetary system, the presence of a second planet will cause the time interval between transits to vary. These transit timing variations (TTV) are particularly large near mean-motion resonances and can be used to infer the orbital elements of planets with masses that are too small to detect by any other means. The author presents the results of a study of simulated data where they show the potential that this planet detection technique has to detect and characterize secondary planets in transiting systems. These results have important ramifications for planetary transit searches since each transiting system presents an opportunity for additional discoveries through a TTV analysis. They present such an analysis for 13 transits of the HD 209458 system that were observed with the Hubble Space Telescope. This analysis indicates that a putative companion in a low-order, mean-motion resonance can be no larger than the mass of the Earth and constitutes, to date, the most sensitive probe for extrasolar planets that orbit main sequence stars. The presence or absence of small planets in low-order, mean-motion resonances has implications for theories of the formation and evolution of planetary systems. Since TTV is most sensitive in these regimes, it should prove a valuable tool not only for the detection of additional planets in transiting systems, but also as a way to determine the dominant mechanisms of planet formation and the evolution of planetary systems.

  20. Assessment of the Applicability of Cooperative Vehicle-Highway Automation Systems to Bus Transit and Intermodal Freight: Case Study Feasibility Analyses in the Metropolitan Chicago Region

    E-Print Network [OSTI]

    2004-01-01T23:59:59.000Z

    it is a form of vehicle automation that could be implementedare developed. For full automation, vehicle-roadway wirelessof Cooperative Vehicle-Highway Automation Systems to Bus

  1. Gd Transition Probabilities and Abundances

    E-Print Network [OSTI]

    E. A. Den Hartog; J. E. Lawler; C. Sneden; J. J. Cowan

    2006-09-18T23:59:59.000Z

    Radiative lifetimes, accurate to +/- 5%, have been measured for 49 even-parity and 14 odd-parity levels of Gd II using laser-induced fluorescence. The lifetimes are combined with branching fractions measured using Fourier transform spectrometry to determine transition probabilities for 611 lines of Gd II. This work is the largest-scale laboratory study to date of Gd II transition probabilities and the first using a high performance Fourier transform spectrometer. This improved data set has been used to determine a new solar photospheric Gd abundance, log epsilon = 1.11 +/- 0.03. Revised Gd abundances have also been derived for the r-process-rich metal-poor giant stars CS 22892-052, BD+17 3248, and HD 115444. The resulting Gd/Eu abundance ratios are in very good agreement with the solar-system r-process ratio. We have employed the increasingly accurate stellar abundance determinations, resulting in large part from the more precise laboratory atomic data, to predict directly the Solar System r-process elemental abundances for Gd, Sm, Ho and Nd. Our analysis of the stellar data suggests slightly higher recommended values for the r-process contribution and total Solar System values, consistent with the photospheric determinations, for the elements for Gd, Sm, and Ho.

  2. Approximating Metal-Insulator Transitions

    E-Print Network [OSTI]

    C. Danieli; K. Rayanov; B. Pavlov; G. Martin; S. Flach

    2014-05-06T23:59:59.000Z

    We consider quantum wave propagation in one-dimensional quasiperiodic lattices. We propose an iterative construction of quasiperiodic potentials from sequences of potentials with increasing spatial period. At each finite iteration step the eigenstates reflect the properties of the limiting quasiperiodic potential properties up to a controlled maximum system size. We then observe approximate metal-insulator transitions (MIT) at the finite iteration steps. We also report evidence on mobility edges which are at variance to the celebrated Aubry-Andre model. The dynamics near the MIT shows a critical slowing down of the ballistic group velocity in the metallic phase similar to the divergence of the localization length in the insulating phase.

  3. IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. 17, NO. 4, APRIL 1999 689 The Rapidly Deployable Radio Network

    E-Print Network [OSTI]

    Kansas, University of

    , and mobile node management. This paper describes the architecture for the Rapidly Deployable Radio Network for implementing mobile, rapidly deployable, and adaptive wireless communica- tions systems. The driving and a prototype system built to evaluate key system components. Index Terms-- Adaptive protocols, mobile

  4. Neuropsychologia xxx (2005) xxxxxx Rapid publication

    E-Print Network [OSTI]

    Gabrieli, John

    2005-01-01T23:59:59.000Z

    Neuropsychologia xxx (2005) xxx­xxx Rapid publication Making sense of another mind: The role. Wexler / Neuropsychologia xxx (2005) xxx­xxx LaBar, Crupain, V

  5. FIVE KEPLER TARGET STARS THAT SHOW MULTIPLE TRANSITING EXOPLANET CANDIDATES

    SciTech Connect (OSTI)

    Steffen, Jason H. [Fermilab Center for Particle Astrophysics, P.O. Box 500, Batavia, IL 60510 (United States); Batalha, Natalie M. [Department of Astronomy and Physics, San Jose State University, San Jose, CA 95192 (United States); Borucki, William J.; Caldwell, Douglas A.; Haas, Michael J.; Jenkins, Jon M.; Koch, David; Lissauer, Jack J. [NASA Ames Research Center, Moffett Field, CA 94035 (United States); Buchhave, Lars A.; Fabrycky, Daniel C.; Fressin, Francois; Holman, Matthew J.; Latham, David W. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Cochran, William D.; Endl, Michael [McDonald Observatory, University of Texas, Austin, TX 78712-2059 (United States); Ford, Eric B.; Moorhead, Althea V. [Department of Astronomy, University of Florida, 211 Bryant Space Science Center, Gainesville, FL 32611-2055 (United States); Fortney, Jonathan J. [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Howell, Steve B. [National Optical Astronomy Observatory, Tucson, AZ 85719 (United States); Isaacson, Howard [Astronomy Department, University of California Berkeley, Berkeley, CA 9472 (United States)

    2010-12-10T23:59:59.000Z

    We present and discuss five candidate exoplanetary systems identified with the Kepler spacecraft. These five systems show transits from multiple exoplanet candidates. Should these objects prove to be planetary in nature, then these five systems open new opportunities for the field of exoplanets and provide new insights into the formation and dynamical evolution of planetary systems. We discuss the methods used to identify multiple transiting objects from the Kepler photometry as well as the false-positive rejection methods that have been applied to these data. One system shows transits from three distinct objects while the remaining four systems show transits from two objects. Three systems have planet candidates that are near mean motion commensurabilities-two near 2:1 and one just outside 5:2. We discuss the implications that multi-transiting systems have on the distribution of orbital inclinations in planetary systems, and hence their dynamical histories, as well as their likely masses and chemical compositions. A Monte Carlo study indicates that, with additional data, most of these systems should exhibit detectable transit timing variations (TTVs) due to gravitational interactions, though none are apparent in these data. We also discuss new challenges that arise in TTV analyses due to the presence of more than two planets in a system.

  6. Safeguards and security issues during facility transition

    SciTech Connect (OSTI)

    Smith, M.R. [USDOE Office of Safeguards and Security, Washington, DC (United States); Zack, N.R. [Los Alamos National Lab., NM (United States). Safeguards Systems Group

    1993-12-31T23:59:59.000Z

    The transition of Department of Energy (DOE) production facilities to those destined for decontamination and decommissioning (D and D) must consider traditional safeguards and security requirements governing nuclear materials. Current DOE safeguards and security policy establishes specific requirements for the removal of facilities and waste from safeguards. However, the current physical security policy does not differentiate the protection of waste from usable materials. Other transition issues include: access of uncleared individuals, positioning security zones, nuclear material holdup, accounting for difficult-to-measure materials, inventory difference and resolution, and radiological/toxicological sabotage. Safeguards and security goals for facility transitioning must provide a workable, efficient and cost-effective system for accounting and protecting nuclear material. In depth protection strategies utilizing combinations of safeguards and security systems should be developed to meet these goals.

  7. Heat capacity at the glass transition

    E-Print Network [OSTI]

    Kostya Trachenko; Vadim Brazhkin

    2010-07-13T23:59:59.000Z

    A fundamental problem of glass transition is to explain the jump of heat capacity at the glass transition temperature $T_g$ without asserting the existence of a distinct solid glass phase. This problem is also common to other disordered systems, including spin glasses. We propose that if $T_g$ is defined as the temperature at which the liquid stops relaxing at the experimental time scale, the jump of heat capacity at $T_g$ follows as a necessary consequence due to the change of system's elastic, vibrational and thermal properties. In this picture, we discuss time-dependent effects of glass transition, and identify three distinct regimes of relaxation. Our approach explains widely observed logarithmic increase of $T_g$ with the quench rate and the correlation of heat capacity jump with liquid fragility.

  8. Functionalized Silicone Nanospheres: Synthesis, Transition Metal...

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

    Functionalized Silicone Nanospheres: Synthesis, Transition Metal Immobilization, and Catalytic Applications. Functionalized Silicone Nanospheres: Synthesis, Transition Metal...

  9. Examining hydrogen transitions.

    SciTech Connect (OSTI)

    Plotkin, S. E.; Energy Systems

    2007-03-01T23:59:59.000Z

    This report describes the results of an effort to identify key analytic issues associated with modeling a transition to hydrogen as a fuel for light duty vehicles, and using insights gained from this effort to suggest ways to improve ongoing modeling efforts. The study reported on here examined multiple hydrogen scenarios reported in the literature, identified modeling issues associated with those scenario analyses, and examined three DOE-sponsored hydrogen transition models in the context of those modeling issues. The three hydrogen transition models are HyTrans (contractor: Oak Ridge National Laboratory), MARKAL/DOE* (Brookhaven National Laboratory), and NEMS-H2 (OnLocation, Inc). The goals of these models are (1) to help DOE improve its R&D effort by identifying key technology and other roadblocks to a transition and testing its technical program goals to determine whether they are likely to lead to the market success of hydrogen technologies, (2) to evaluate alternative policies to promote a transition, and (3) to estimate the costs and benefits of alternative pathways to hydrogen development.

  10. 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)

    2006-01-15T23:59:59.000Z

    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.

  11. Magnetic dipole transition rates from measured lifetimes of levels of Be-like and B-like argon ions 

    E-Print Network [OSTI]

    Moehs, D. P.; Church, David A.

    1998-01-01T23:59:59.000Z

    level is rapidly depopulated by E1 transitions to the ground level. The 2s2p 3P2 level also decays to the lower 3P levels by E2 transi- tions, but at negligible rates for Ar XV, and by an M2 transition to the 2s2 1S0 ground level with a calculated...

  12. Electroweak phase transitions

    SciTech Connect (OSTI)

    Anderson, G.W.

    1991-09-16T23:59:59.000Z

    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.

  13. Electroweak phase transitions

    SciTech Connect (OSTI)

    Anderson, G.W.

    1991-09-16T23:59:59.000Z

    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.

  14. An Analysis of the Impacts of British Transport Reforms on Transit Integration in the Metropolitan Areas

    E-Print Network [OSTI]

    Rivasplata, Charles Richard

    2006-01-01T23:59:59.000Z

    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

  15. Glass Transition, Cooperativity and Interfaces

    E-Print Network [OSTI]

    Salez, Thomas; Dalnoki-Veress, Kari; Raphaël, Elie; Forrest, James A

    2015-01-01T23:59:59.000Z

    We introduce a minimal theory of glass formation based on the physical ideas of molecular crowding and resultant cooperative motion, and address the effects of free interfaces on dynamics. First, we obtain a simple scaling expression for the diverging number of particles taking part in bulk cooperative relaxation as the system approaches kinetic arrest, and in doing so provide a robust derivation of the Adam and Gibbs description of cooperative dynamics. Then, by including thermal expansivity of the material, the Vogel-Fulcher-Tammann relation is derived. Moreover, we predict a temperature-dependent expression for the cooperative length $\\xi$ of bulk relaxation, and explore the influence of sample boundaries on the glassy dynamics when the system size becomes comparable to $\\xi$. The theory is in full agreement with measurements of the glass transition temperature of thin polystyrene films. This agreement comes with two adjustable parameters, the critical interparticle distance and the Vogel temperature. Alth...

  16. Termination Analysis with Compositional Transition Invariants

    E-Print Network [OSTI]

    Sharygina, Natasha

    Automated termination analysis of systems code has advanced to a level that permits industrial application that uses a light-weight check based on transitivity of ranking relations to prove program termination. We if there exists a ranking function for every program execution. Substantial progress towards the applicability

  17. Activation Energies from Transition Path Sampling Simulations

    E-Print Network [OSTI]

    Dellago, Christoph

    unavailable for processes occurring in complex systems. Since in this method activation energies diatomic immersed in a bath of repulsive soft particles. Keywords: Activation energy; Computer simulation on the transition path sampling methodology, our approach to determine activation energies does not require full

  18. A Robust and Rapid Method of Producing Soluble, Stable, and Functional G-Protein Coupled Receptors

    E-Print Network [OSTI]

    Baaske, Philipp

    Membrane proteins, particularly G-protein coupled receptors (GPCRs), are notoriously difficult to express. Using commercial E.coli cell-free systems with the detergent Brij-35, we could rapidly produce milligram quantities ...

  19. Rapid Wireless Capacitor Charging Using a Multi-Tapped Inductively-Coupled Secondary Coil

    E-Print Network [OSTI]

    Mercier, Patrick P.

    This paper presents an inductive coupling system designed to wirelessly charge ultra-capacitors used as energy storage elements. Although ultra-capacitors offer the native ability to rapidly charge, it is shown that standard ...

  20. Designing a Bayesian Network for Preventive Maintenance from Expert Opinions in a Rapid

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Designing a Bayesian Network for Preventive Maintenance from Expert Opinions in a Rapid-Linear Model, Expert Opinion, Complexity Reduction, Maintenance. 1 Introduction Preventive maintenance became essential. Preventive maintenance of a system is taking into account expert knowledge, feedback

  1. The Glass Transition in Fluids with Magnetic Interactions

    E-Print Network [OSTI]

    Ricardo Gutierrez; Bhaskar Sen Gupta; Itamar Procaccia

    2014-06-15T23:59:59.000Z

    We study the glass transition in fluids where particles are endowed with spins, such that magnetic and positional degrees of freedom are coupled. Novel results for slowing down in the spin time-correlation functions are described, and the effects of magnetic fields on the glass transition are studied. Aging effects in such systems and the corresponding data collapse are presented and discussed.

  2. APOSTLE: 11 TRANSIT OBSERVATIONS OF TrES-3b

    SciTech Connect (OSTI)

    Kundurthy, P.; Becker, A. C.; Agol, E.; Barnes, R.; Williams, B. [Astronomy Department, University of Washington, Seattle, WA 98195 (United States)] [Astronomy Department, University of Washington, Seattle, WA 98195 (United States)

    2013-02-10T23:59:59.000Z

    The Apache Point Survey of Transit Lightcurves of Exoplanets (APOSTLE) observed 11 transits of TrES-3b over two years in order to constrain system parameters and look for transit timing and depth variations. We describe an updated analysis protocol for APOSTLE data, including the reduction pipeline, transit model, and Markov Chain Monte Carlo analyzer. Our estimates of the system parameters for TrES-3b are consistent with previous estimates to within the 2{sigma} confidence level. We improved the errors (by 10%-30%) on system parameters such as the orbital inclination (i {sub orb}), impact parameter (b), and stellar density ({rho}{sub *}) compared to previous measurements. The near-grazing nature of the system, and incomplete sampling of some transits, limited our ability to place reliable uncertainties on individual transit depths and hence we do not report strong evidence for variability. Our analysis of the transit timing data shows no evidence for transit timing variations and our timing measurements are able to rule out super-Earth and gas giant companions in low-order mean motion resonance with TrES-3b.

  3. Transit timing with fast cameras on large telescopes

    E-Print Network [OSTI]

    Adams, Elisabeth Rose

    2010-01-01T23:59:59.000Z

    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 ...

  4. 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)

    2006-09-01T23:59:59.000Z

    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.

  5. Transition Implementation Guide

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

    2001-04-24T23:59:59.000Z

    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.

  6. TRANSITION STRATEGIES Sig Gronich

    E-Print Network [OSTI]

    Options. ·Natural Gas Hydrogen · Biomass Hydrogen ·Distributed Coal / IGCC Hydrogen · Compressed Gas special attention to the transition to a nascent hydrogen economy · Analyze cost goals and Liquid Storage · Electrolysis · Compressed Gas Delivery · Cold Gas Delivery and Liquid Delivery · Co

  7. Variational transition state theory

    SciTech Connect (OSTI)

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

    1993-12-01T23:59:59.000Z

    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.

  8. Advanced Methods Approach to Hybrid Powertrain Systems Optimization...

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

    Methods Approach to Hybrid Powertrain Systems Optimization of a Transit Bus Application Advanced Methods Approach to Hybrid Powertrain Systems Optimization of a Transit Bus...

  9. Sudden transition between classical and quantum decoherence

    E-Print Network [OSTI]

    L. Mazzola; J. Piilo; S. Maniscalco

    2010-04-25T23:59:59.000Z

    We study the dynamics of quantum and classical correlations in the presence of nondissipative decoherence. We discover a class of initial states for which the quantum correlations, quantified by the quantum discord, are not destroyed by decoherence for times t \\bar{t}, on the other hand, classical correlations do not change in time and only quantum correlations are lost due to the interaction with the environment. Therefore, at the transition time \\bar{t} the open system dynamics exhibits a sudden transition from classical to quantum decoherence regime.

  10. A study of flow in transition pieces

    E-Print Network [OSTI]

    Kochan, Thomas Walter

    1976-01-01T23:59:59.000Z

    . , Mummalog F J g "Boundary Layer Induced Potential Flow on an Elliptical Cylinder, " Journal of Fluid Mechanics, Vol. 66, Part 1, 1974, pp. 145-157. 3 Glassman, A. J. , "Turbine Design and Application, " NASA Report No. SP-290, Vol. 2, 1973. 4 Schlichting... piece to be used and often acts as the prime design consideration, as the transition piece has the primary purpose of routing the flow. See Figures 1 and 2. The method of flow routing in a transition piece can in- troduce losses in the system...

  11. Transitions for the People: Theory and Practice of `Transition' and

    E-Print Network [OSTI]

    Watson, Andrew

    respond to the challenges, and opportunities, of Peak Oil and Climate Change?" [Transition Network 2008 change and peak-oil. There is much of interest here, for academics of sustainability transitions

  12. Charged particle rapidity distributions at relativistic energies 

    E-Print Network [OSTI]

    Lin, ZW; Pal, S.; Ko, Che Ming; Li, Ba; Zhang, B.

    2001-01-01T23:59:59.000Z

    Using a multiphase transport model (AMPT), which includes both initial partonic and final hadronic interactions, we study the rapidity distributions of charged particles such as protons, antiprotons, pions, and kaons in heavy ion collisions at RHIC...

  13. Transition-fault test generation

    E-Print Network [OSTI]

    Cobb, Bradley Douglas

    2013-02-22T23:59:59.000Z

    . One way to detect these timing defects is to apply test patterns to the integrated circuit that are generated using the transition-fault model. Unfortunately, industry's current transition-fault test generation schemes produce test sets that are too...

  14. Calixarene supported transition metal clusters 

    E-Print Network [OSTI]

    Taylor, Stephanie Merac

    2013-06-29T23:59:59.000Z

    This thesis describes a series of calix[n]arene polynuclear transition metal and lanthanide complexes. Calix[4]arenes possess lower-rim polyphenolic pockets that are ideal for the complexation of various transition metal ...

  15. Smart Parking Mangement Field Test: A Bay Area Rapid Transit (BART) District Parking Demonstration Final Report

    E-Print Network [OSTI]

    Rodier, Caroline J.; Shaheen, Susan; Kemmerer, Charlene

    2008-01-01T23:59:59.000Z

    pollution. Although local pol- lution is negligible, they do operate on electricity generated mainly from coal-?

  16. The experience and image of American elevated railways : rapid transit infrastructure in the urban consciousness

    E-Print Network [OSTI]

    Hansen, Gordon Benedict

    2009-01-01T23:59:59.000Z

    At the turn of the twentieth century, elevated railways were built out of a practical need to literally "elevate" traffic above the street. In most cases, these lines served two distinct purposes. They served existing ...

  17. Bus Rapid Transit (BRT): An Efficient and Competitive Mode of Public Transport

    E-Print Network [OSTI]

    Cervero, Robert

    2013-01-01T23:59:59.000Z

    9,  No.  4,  pp.  69-­?87.   IEA  (International  Energy  to  2050.     Paris:  OECD/IEA.     ITDB  (Institute  for  

  18. Bus Rapid Transit Impacts on Land Uses and Land Values in Seoul, Korea

    E-Print Network [OSTI]

    Cervero, Robert; Kang, Chang Deok

    2009-01-01T23:59:59.000Z

    an ambitious campaign of land reclamation, taking valuablehub of Seoul’s ambitious land reclamation and redevelopment

  19. Bus Rapid Transit (BRT): An Efficient and Competitive Mode of Public Transport

    E-Print Network [OSTI]

    Cervero, Robert

    2013-01-01T23:59:59.000Z

    Towards  a  smart  future  for  cities:  urban  transport  Despite  compact-­?city  and  smart-­?growth  initiatives,  

  20. Bus Rapid Transit (BRT): An Efficient and Competitive Mode of Public Transport

    E-Print Network [OSTI]

    Cervero, Robert

    2013-01-01T23:59:59.000Z

    to   economize  on  investment  costs,  there  has  been  in  terms  of  investment  and  operating   costs  per  Densities  and  Cost-­?Effective  Investments     To  

  1. The impact of rapid transItions in mental workload in a supervisory control setting

    E-Print Network [OSTI]

    Boyer, Mark W. (Mark William)

    2014-01-01T23:59:59.000Z

    With improving and expanding automation in domains such as unmanned aerial vehicles, nuclear power plants, and commercial aviation, operators will be expected to handle long periods of low task load while monitoring these ...

  2. Smart Parking Mangement Field Test: A Bay Area Rapid Transit (BART) District Parking Demonstration Final Report

    E-Print Network [OSTI]

    Rodier, Caroline J.; Shaheen, Susan; Kemmerer, Charlene

    2008-01-01T23:59:59.000Z

    and destinations using a grid map. They were then asked towhich they located using a grid map attached to the survey.

  3. The Transition To Electric Bikes In China: History And Key Reasons For Rapid Growth

    E-Print Network [OSTI]

    Weinert, Jonathan X.; Ma, Chaktan; Cherry, Chris

    2006-01-01T23:59:59.000Z

    that ushers in small battery electric cars. In any case, thethe Manufacture of Mini Electric Cars Based on Experience

  4. FTA-Characteristics of Bus Rapid Transit for Decision-Making | Open Energy

    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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluating A PotentialJumpGerman AerospaceEfficiency Incentives and PoliciesHomenoFRV

  5. TRB-Transit Cooperative Research Program (TCRP): Case Studies in Bus Rapid

    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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries PvtStratosolar Jump to:Holdings Co08.0 -TEEMP Jump to:TIAX LLC JumpTR-0015

  6. The energy transition Gerald Leach

    E-Print Network [OSTI]

    Kammen, Daniel M.

    The energy transition Gerald Leach The paper considers the substitution of tradition. The In the context of energy policy and planning, the paper concludes with a review of the reasons why transition. In the IS THE TRANSITION HAPPENING? poorest developing countries biomass fuels account for 60-95% of total energy use

  7. IDEA Reauthorized Statute SECONDARY TRANSITION

    E-Print Network [OSTI]

    IDEA ­ Reauthorized Statute SECONDARY TRANSITION (See also Individualized Education Program (IEP This document addresses only the changes to the IDEA provisions regarding secondary transition that took effect from the term "transition services" now refers to a "child" instead of a "student," The definition

  8. Evaluation of rainfall-induced landslide transit characterization

    E-Print Network [OSTI]

    Chen, Yi-Ting, Civ. E. Massachusetts Institute of Technology

    2012-01-01T23:59:59.000Z

    As landslide hazard has intensified in the past decades, the development of landslide hazard evaluation systems has become more and more important. However, not much attention is paid to discussing the landslide transition ...

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

    E-Print Network [OSTI]

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

    2008-01-01T23:59:59.000Z

    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 ...

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

    E-Print Network [OSTI]

    Nakajima, Tsukihito

    2007-01-01T23:59:59.000Z

    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 ...

  11. Transition from Irradiation-Induced Amorphization to Crystallization...

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

    nanocrystalline SiC on nuclear fuel cladding and structural components of next-generation nuclear energy systems. Citation: Jiang W, L Jiao, and H Wang.2011."Transition from...

  12. Radiative Transitions in Charmonium

    SciTech Connect (OSTI)

    Jozef Dudek; Robert Edwards; David Richards

    2005-10-01T23:59:59.000Z

    The form factors for the radiative transitions between charmonium mesons are investigated. We employ an anisotropic lattice using a Wilson gauge action, and domain-wall fermion action. We extrapolate the form factors to Q{sup 2} = 0, corresponding to a real photon, using quark-model-inspired functions. Finally, comparison is made with photocouplings extracted from the measured radiative widths, where known. Our preliminary results find photocouplings commensurate with these experimentally extracted values.

  13. Refrigerants in Transition

    E-Print Network [OSTI]

    Stouppe, D. E.

    .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 class of chemicals called fluorocarbons..., Gordon, "Forty Years Research on Atmospheric Ozone at Oxford: A !Iistory," Applied Optics, March t968, pp. 387-405. 4. Downing, R., "Development of Chloro fluorocarbon Refrigerants," CFCs: Time of Transition, ASHRAE Publication, Atlanta, GA, 1989...

  14. The Transition between Star Clusters and Dwarf Galaxies -- On the existence of a mass-radius relation for star clusters of masses >10^7 Mo: are these objects formed in mergers of stellar systems?

    E-Print Network [OSTI]

    Markus Kissler-Patig; Andres Jordan; Nate Bastian

    2005-12-14T23:59:59.000Z

    At which masses does the regime of globular clusters end and the one of dwarf galaxies begin? And what separates these two classes of hot stellar systems? We examine to what extend very massive (>10^7 Mo) young star clusters are similar to their lower mass counter parts and to which degree they resemble other objects in their mass regime (dwarf--globular transition objects (DGTOs), ultra compact dwarf galaxies (UCDs), galaxy nuclei). The comparison is performed by placing the recently observed very massive young clusters onto known scaling relation defined by globular clusters (with typical masses 10^{6.5-7} Mo) young clusters seem to show a mass--radius relation compatible with the one defined by hot stellar systems of galaxy mass. This, in turn, can explain their location on the other scaling relations investigated. It contrasts with the behaviour of the less massive young clusters and of globular clusters, which do not exhibit any mass-radius relation. However, the behaviour of the most massive clusters is similar to that of most other objects in that mass regime (10^6-10^8 Mo). We show that the properties of young massive clusters are compatible with other objects in the same mass regime such as DGTOs/UCDs. They present a possible direct avenue of formation for those objects, which does not require the transformation of a previously existing stellar system. Simulations and observations support the possibility of the formation of such very massive young clusters by early mergers of lower mass stellar clusters, which could explain the emergence of a mass--radius relation.

  15. Rapid haplotype inference for nuclear families

    E-Print Network [OSTI]

    Williams, Amy L.

    Hapi is a new dynamic programming algorithm that ignores uninformative states and state transitions in order to efficiently compute minimum-recombinant and maximum likelihood haplotypes. When applied to a dataset containing ...

  16. City of Grand Rapids Building Solar Roof Demonstration

    SciTech Connect (OSTI)

    DeClercq, Mark; Martinez, Imelda

    2012-08-31T23:59:59.000Z

    Grand Rapids, Michigan is striving to reduce it environmental footprint. The municipal government organization has established environmental sustainability policies with the goal of securing 100% of its energy from renewable sources by 2020. This report describes the process by which the City of Grand Rapids evaluated, selected and installed solar panels on the Water/Environmental Services Building. The solar panels are the first to be placed on a municipal building. Its new power monitoring system provides output data to assess energy efficiency and utilization. It is expected to generate enough clean solar energy to power 25 percent of the building. The benefit to the public includes the economic savings from reduced operational costs for the building; an improved environmentally sustainable area in which to live and work; and increased knowledge about the use of solar energy. It will serve as a model for future energy saving applications.

  17. Rapid mapping tool : an ArcMap extension /

    SciTech Connect (OSTI)

    Linger, S. P. (Steve P.); Rich, P. M. (Paul M.); Walther, D. (Douglas); Witkowski, M. S. (Marc S.); Jones, M. A. (Marcia A.); Khalsa, H. S. (Hari S.)

    2002-01-01T23:59:59.000Z

    Cartographic production laboratories produce large volumes of maps for diverse customers. Turnaround time and consistency are key concerns. The Rapid Mapping Tool is an ArcMap based tool that enables rapid creation of maps to meet customer needs. This tool was constructed using VB/VBA, ArcObjects, and ArcGIS templates. The core capability of ArcMap is extended for custom map production by storing specifications associated with a map or template in a companion XML document. These specifications include settings and preferences used to create custom maps. The tool was developed as a component of an enterprise GIS, which enables spatial data management and delivery using ArcSDE, ArcIMS, Oracle, and a web-based request tracking system.

  18. Alameda-Contra Costa Transit District (AC Transit) Fuel Cell Transit Buses: Preliminary Evaluation Results

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2007-03-01T23:59:59.000Z

    This report 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 fuel cell buses.

  19. Analytic equivalence of geometric transitions

    E-Print Network [OSTI]

    Michele Rossi

    2014-08-28T23:59:59.000Z

    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.

  20. TRANSIT TIMING OBSERVATIONS FROM KEPLER. V. TRANSIT TIMING VARIATION CANDIDATES IN THE FIRST SIXTEEN MONTHS FROM POLYNOMIAL MODELS

    SciTech Connect (OSTI)

    Ford, Eric B. [Astronomy Department, University of Florida, 211 Bryant Space Sciences Center, Gainesville, FL 32111 (United States); Ragozzine, Darin; Holman, Matthew J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Rowe, Jason F.; Barclay, Thomas; Borucki, William J.; Bryson, Stephen T.; Caldwell, Douglas A.; Kinemuchi, Karen; Koch, David G.; Lissauer, Jack J.; Still, Martin; Tenenbaum, Peter [NASA Ames Research Center, Moffett Field, CA 94035 (United States); Steffen, Jason H. [Fermilab Center for Particle Astrophysics, P.O. Box 500, MS 127, Batavia, IL 60510 (United States); Batalha, Natalie M. [Department of Physics and Astronomy, San Jose State University, San Jose, CA 95192 (United States); Fabrycky, Daniel C. [UCO/Lick Observatory, University of California, Santa Cruz, CA 95064 (United States); Gautier, Thomas N. [Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA 91109 (United States); Ibrahim, Khadeejah A.; Uddin, Kamal [Orbital Sciences Corporation/NASA Ames Research Center, Moffett Field, CA 94035 (United States); Kjeldsen, Hans, E-mail: eford@astro.ufl.edu [Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark); and others

    2012-09-10T23:59:59.000Z

    Transit timing variations provide a powerful tool for confirming and characterizing transiting planets, as well as detecting non-transiting planets. We report the results of an updated transit timing variation (TTV) analysis for 1481 planet candidates based on transit times measured during the first sixteen months of Kepler observations. We present 39 strong TTV candidates based on long-term trends (2.8% of suitable data sets). We present another 136 weaker TTV candidates (9.8% of suitable data sets) based on the excess scatter of TTV measurements about a linear ephemeris. We anticipate that several of these planet candidates could be confirmed and perhaps characterized with more detailed TTV analyses using publicly available Kepler observations. For many others, Kepler has observed a long-term TTV trend, but an extended Kepler mission will be required to characterize the system via TTVs. We find that the occurrence rate of planet candidates that show TTVs is significantly increased ({approx}68%) for planet candidates transiting stars with multiple transiting planet candidates when compared to planet candidates transiting stars with a single transiting planet candidate.

  1. Transition Strategies: Government Options and Market Penetration...

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

    Strategies: Government Options and Market Penetration Scenarios Transition Strategies: Government Options and Market Penetration Scenarios Presentation on Transition Strategies:...

  2. Bubbling Reactor Technology for Rapid Synthesis of Uniform, Small...

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

    Bubbling Reactor Technology for Rapid Synthesis of Uniform, Small MFI-Type Zeolite Crystals . Bubbling Reactor Technology for Rapid Synthesis of Uniform, Small MFI-Type Zeolite...

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

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2009-05-01T23:59:59.000Z

    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.

  4. Transition Metal Switchable Mirror

    ScienceCinema (OSTI)

    None

    2010-01-08T23:59:59.000Z

    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.

  5. Transition Metal Switchable Mirror

    ScienceCinema (OSTI)

    None

    2013-05-29T23:59:59.000Z

    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

  6. Transition Metal Switchable Mirror

    SciTech Connect (OSTI)

    None

    2009-01-01T23:59:59.000Z

    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

  7. Transition Metal Switchable Mirror

    SciTech Connect (OSTI)

    2009-08-21T23:59:59.000Z

    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.

  8. RAPID COMMUNICATIONS IN MASS SPECTROMETRY Rapid Commun. Mass Spectrom. 2005; 19: 32483252

    E-Print Network [OSTI]

    Kim, Myung Soo

    to be that photofragment ions generated at this wavelength are similar to those from low- and high-energy CAD, and are thusRAPID COMMUNICATIONS IN MASS SPECTROMETRY Rapid Commun. Mass Spectrom. 2005; 19: 3248 of singly protonated peptides at 193 nm investigated with tandem time-of-flight mass spectrometry Jeong Hee

  9. RAPID COMMUNICATIONS IN MASS SPECTROMETRY Rapid Commun. Mass Spectrom. 2005; 19: 24812487

    E-Print Network [OSTI]

    Kim, Myung Soo

    chromophore dissociated efficiently when a suf- ficiently high laser pulse energy was used. Also, the pulseRAPID COMMUNICATIONS IN MASS SPECTROMETRY Rapid Commun. Mass Spectrom. 2005; 19: 2481 time-of- flight (TOF) mass spectrometry of ions generated by matrix-assisted laser desorption

  10. RAPID COMMUNICATION / COMMUNICATION RAPIDE Validation of Sr isotopes in otoliths by laser

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    RAPID COMMUNICATION / COMMUNICATION RAPIDE Validation of Sr isotopes in otoliths by laser ablation à plasma inductif avec multicollecteur après ablation au laser (LA-MC-ICPMS) et par spectrométrie de ratios using laser abla- tion multicollector inductively coupled plasma mass spectrometry (LA

  11. Bifurcation analysis and dimension reduction of a predator-prey model for the L-H transition

    SciTech Connect (OSTI)

    Dam, Magnus; Brøns, Morten [Department of Applied Mathematics and Computer Science, Technical University of Denmark, DK-2800 Kgs. Lyngby (Denmark)] [Department of Applied Mathematics and Computer Science, Technical University of Denmark, DK-2800 Kgs. Lyngby (Denmark); Juul Rasmussen, Jens; Naulin, Volker [Association Euratom-DTU, Department of Physics, Technical University of Denmark, DTU Risø Campus, DK-4000 Roskilde (Denmark)] [Association Euratom-DTU, Department of Physics, Technical University of Denmark, DTU Risø Campus, DK-4000 Roskilde (Denmark); Xu, Guosheng [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)] [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)

    2013-10-15T23:59:59.000Z

    The L-H transition denotes a shift to an improved confinement state of a toroidal plasma in a fusion reactor. A model of the L-H transition is required to simulate the time dependence of tokamak discharges that include the L-H transition. A 3-ODE predator-prey type model of the L-H transition is investigated with bifurcation theory of dynamical systems. The analysis shows that the model contains three types of transitions: an oscillating transition, a sharp transition with hysteresis, and a smooth transition. The model is recognized as a slow-fast system. A reduced 2-ODE model consisting of the full model restricted to the flow on the critical manifold is found to contain all the same dynamics as the full model. This means that all the dynamics in the system is essentially 2-dimensional, and a minimal model of the L-H transition could be a 2-ODE model.

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

    Open Energy Info (EERE)

    on the cost, maintenance, operational, and emission characteristics of diesel hybrid-electric systems as one alternative to conventional diesel engines for heavy-duty transit...

  13. Hf Transition Probabilities and Abundances

    E-Print Network [OSTI]

    J. E. Lawler; E. A. Den Hartog; Z. E. Labby; C. Sneden; J. J. Cowan; I. I. Ivans

    2006-11-01T23:59:59.000Z

    Radiative lifetimes from laser-induced fluorescence measurements, accurate to about +/- 5 percent, are reported for 41 odd-parity levels of Hf II. The lifetimes are combined with branching fractions measured using Fourier transform spectrometry to determine transition probabilities for 150 lines of Hf II. Approximately half of these new transition probabilities overlap with recent independent measurements using a similar approach. The two sets of measurements are found to be in good agreement for measurements in common. Our new laboratory data are applied to refine the hafnium photospheric solar abundance and to determine hafnium abundances in 10 metal-poor giant stars with enhanced r-process abundances. For the Sun we derive log epsilon (Hf) = 0.88 +/- 0.08 from four lines; the uncertainty is dominated by the weakness of the lines and their blending by other spectral features. Within the uncertainties of our analysis, the r-process-rich stars possess constant Hf/La and Hf/Eu abundance ratios, log epsilon (Hf/La) = -0.13 +/- 0.02 (sigma = 0.06) and log epsilon (Hf/Eu) = +0.04 +/- 0.02 (sigma = 0.06). The observed average stellar abundance ratio of Hf/Eu and La/Eu is larger than previous estimates of the solar system r-process-only value, suggesting a somewhat larger contribution from the r-process to the production of Hf and La. The newly determined Hf values could be employed as part of the chronometer pair, Th/Hf, to determine radioactive stellar ages.

  14. Phase transition in p53 states induced by glucose

    E-Print Network [OSTI]

    Md. Jahoor Alam; R. K. Brojen Singh

    2015-04-02T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Lammert, M.

    2008-06-01T23:59:59.000Z

    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.

  16. Rapid automatic keyword extraction for information retrieval and analysis

    DOE Patents [OSTI]

    Rose, Stuart J (Richland, WA); Cowley,; Wendy E (Richland, WA); Crow, Vernon L (Richland, WA); Cramer, Nicholas O (Richland, WA)

    2012-03-06T23:59:59.000Z

    Methods and systems for rapid automatic keyword extraction for information retrieval and analysis. Embodiments can include parsing words in an individual document by delimiters, stop words, or both in order to identify candidate keywords. Word scores for each word within the candidate keywords are then calculated based on a function of co-occurrence degree, co-occurrence frequency, or both. Based on a function of the word scores for words within the candidate keyword, a keyword score is calculated for each of the candidate keywords. A portion of the candidate keywords are then extracted as keywords based, at least in part, on the candidate keywords having the highest keyword scores.

  17. Gravitational microlensing of stars with transiting planets

    E-Print Network [OSTI]

    Geraint F. Lewis

    2001-10-17T23:59:59.000Z

    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.

  18. RAPID COMMUNICATION Navigational Skills Correlate With Hippocampal

    E-Print Network [OSTI]

    Iaria, Giuseppe

    ; topographical orientation; virtual environment; cognitive map INTRODUCTION Evidence from human and non-humanRAPID COMMUNICATION Navigational Skills Correlate With Hippocampal Fractional Anisotropy in Humans animals (O'Keefe and Nadel, 1978; Mellet et al., 2000) has shown that successful orientation within

  19. Glass transition of two-dimensional binary soft-disk mixtures with large size ratios Rei Kurita* and Eric R. Weeks

    E-Print Network [OSTI]

    Weeks, Eric R.

    Glass transition of two-dimensional binary soft-disk mixtures with large size ratios Rei Kurita the glass transition. The "fragility" quantifies how sensitively the relaxation time scale depends.20.Ja, 64.60.My I. INTRODUCTION Many liquids can form glasses if they are cooled rapidly, and glassy

  20. Scaling Effects in the CSP Phase Transition \\Lambda Ian P. Gent y , Ewan MacIntyre, y Patrick Prosser y , and Toby Walsh z

    E-Print Network [OSTI]

    St Andrews, University of

    Scaling Effects in the CSP Phase Transition \\Lambda Ian P. Gent y , Ewan MacIntyre, y Patrick of Strathclyde April 18, 1995 Abstract Phase transitions in constraint satisfaction problems (CSP's) are the subject of intense study. We identify an order parameter for random binary CSP's. There is a rapid

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

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2008-10-01T23:59:59.000Z

    This report provides preliminary results from a National Renewable Energy Laboratory evaluation of a protoptye fuel cell transit bus operating at Connecticut Transit in Hartford. Included are descriptions of the planned fuel cell bus demonstration and equipment; early results and agency experience are also provided.

  2. Rapid magnitude determination for earthquake early warning Richard M Allen University of Wisconsin-Madison

    E-Print Network [OSTI]

    Allen, Richard M.

    of an earthquake early warning system is to provide notification of ground shaking hazard before significant ground of hazard. Here I present an overview of such an early warning system designed for use with a dense seismic1 Rapid magnitude determination for earthquake early warning Richard M Allen ­ University

  3. Dr. John Slough "Rapid Manned Mars Mission with a Propagating Magnetic Wave

    E-Print Network [OSTI]

    Shepherd, Simon

    Dr. John Slough MSNW "Rapid Manned Mars Mission with a Propagating Magnetic Wave Plasma Accelerator" For man to venture forth into the solar system, a radically different propulsion system must be envisioned problem. This is accomplished by employing a travelling magnetic wave accelerator to accelerate

  4. The chiral transition in two-flavor QCD

    E-Print Network [OSTI]

    M. D'Elia; A. Di Giacomo; C. Pica

    2005-10-03T23:59:59.000Z

    QCD with N_f=2 is a specially interesting system to investigate the chiral transition. The order of the transition has still not been established. We report the results of an in-depth numerical investigation performed with staggered fermions on lattices with L_t=4 and L_s=12,16,20,24,32 and quark masses am_q ranging from 0.01335 to 0.307036. Using finite-size techniques we compare the scaling behavior of a number of thermodynamical susceptibilities with the expectations of O(4) and O(2) universality classes. Clear disagreement is observed. Indications of a first order transition are found.

  5. Low Frequency Acoustic Resonance Studies of the Liquid-Vapor Transition in Silica Aerogel

    E-Print Network [OSTI]

    Tobias Herman; John Beamish

    2005-06-30T23:59:59.000Z

    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.

  6. "A New Rapid Tooling Technique and Its Special Binder Study," Jack Zhou and Z. He, Journal of Rapid Prototyping, Vol. 5, No. 2, pp. 82-88, 1999.

    E-Print Network [OSTI]

    Zhou, Jack

    by the various RP systems can not be applied to real production. Rapid Tooling (RT) technology is defined and efficiently so the resultant part will be representative of production material (Jacobs, 1996). Up to now be considered. Silicone Rubber Technique and Keltool In this kind of techniques (Flint and Ellis, 1994

  7. Medical Transportation Program Impact on Rural Transit in Texas Resource-Based Cost Allocation Methodology

    E-Print Network [OSTI]

    Edrington, Andrea Suzanne

    2012-02-14T23:59:59.000Z

    -on-one discussions with Texas transit districts revealed that rural transit districts are concerned about the impacts that operating MTP service may have on operations and funding. For a coordinated rural demand response transit system, MTP may enhance system... traveling up to 700 miles and several hours one way for their medical care (Borders, 2006, p. 86).? Minnesota Department of Transportation, Coordination Action Plan, provides best practices for implementing a fully allocated cost methodology...

  8. Reconsidering Rapid Qubit Purification by Feedback

    E-Print Network [OSTI]

    H. M. Wiseman; J. F. Ralph

    2006-05-13T23:59:59.000Z

    This paper reconsiders the claimed rapidity of a scheme for the purification of the quantum state of a qubit, proposed recently in Jacobs 2003 Phys. Rev. A67 030301(R). The qubit starts in a completely mixed state, and information is obtained by a continuous measurement. Jacobs' rapid purification protocol uses Hamiltonian feedback control to maximise the average purity of the qubit for a given time, with a factor of two increase in the purification rate over the no-feedback protocol. However, by re-examining the latter approach, we show that it mininises the average time taken for a qubit to reach a given purity. In fact, the average time taken for the no-feedback protocol beats that for Jacobs' protocol by a factor of two. We discuss how this is compatible with Jacobs' result, and the usefulness of the different approaches.

  9. On seismic signatures of rapid variation

    E-Print Network [OSTI]

    G. Houdek; D. O. Gough

    2006-12-01T23:59:59.000Z

    We present an improved model for an asteroseismic diagnostic contained in the frequency spacing of low-degree acoustic modes. By modelling in a realistic manner regions of rapid variation of dynamically relevant quantities, which we call acoustic glitches, we can derive signatures of the gross properties of those glitches. In particular, we are interested in measuring properties that are related to the helium ionization zones and to the rapid variation in the background state associated with the lower boundary of the convective envelope. The formula for the seismic diagnostic is tested against a sequence of theoretical models of the Sun, and is compared with seismic diagnostics published previously by Monteiro & Thompson (1998, 2005) and by Basu et al. (2004).

  10. Generalized Ehrenfest's Equations and phase transition in Black Holes

    E-Print Network [OSTI]

    Mohammad Bagher Jahani Poshteh; Behrouz Mirza; Fatemeh Oboudiat

    2015-03-09T23:59:59.000Z

    We generalize Ehrenfest's equations to systems having two work terms, i.e. systems with three degrees of freedom. For black holes with two work terms we obtain nine equations instead of two to be satisfied at the critical point of a second order phase transition. We finally generalize this method to a system with an arbitrary number of degrees of freedom and found there is $\\frac{N(N+1)^{2}}{2}$ equations to be satisfied at the point of a second order phase transition where $N$ is number of work terms in the first law of thermodynamics.

  11. Rapid Cooling of the Neutron Star in Cassiopeia A Triggered by Neutron Superfluidity in Dense Matter

    E-Print Network [OSTI]

    Dany Page; Madappa Prakash; James M. Lattimer; Andrew W. Steiner

    2011-01-19T23:59:59.000Z

    We propose that the observed cooling of the neutron star in Cassiopeia A is due to enhanced neutrino emission from the recent onset of the breaking and formation of neutron Cooper pairs in the 3P2 channel. We find that the critical temperature for this superfluid transition is ~0.5x10^9 K. The observed rapidity of the cooling implies that protons were already in a superconducting state with a larger critical temperature. Our prediction that this cooling will continue for several decades at the present rate can be tested by continuous monitoring of this neutron star.

  12. Method and apparatus for upshifting light frequency by rapid plasma creation

    DOE Patents [OSTI]

    Dawson, John M. (Pacific Palisades, CA); Wilks, Scott C. (Santa Monica, CA); Mori, Warren B. (Hermosa Beach, CA); Joshi, Chandrasekhar J. (Santa Monica, CA); Sessler, Andrew M. (Oakland, CA)

    1990-01-01T23:59:59.000Z

    Photons of an electromagnetic source wave are frequency-upshifted as a plasma is rapidly created around the path of this propagating source wave. The final frequency can be controlled by adjusting the gas density. A controlled time-varying frequency (chirped) pulse can be produced by using a controlled spatially varying gas density. The plasma must be created in a time which is short compared to the transit time of the light through the plasmas region. For very fast creation over one to at most a few light periods of an overdense plasma, static magnetic fields with short wavelengths are created.

  13. On the rapid intensification of typhoons

    E-Print Network [OSTI]

    Holliday, Charles Richard

    1977-01-01T23:59:59.000Z

    readings for typhoons typical of type 2 development (Virginia, . June 1957; and Anita, August 1970). Arrow indicates onset of rapid deepening (& 1. 75 mb h 1). s deep typhoons (& 920 mb) and the maximum 24-h pressure fall Central pressure fall rates... of typhoon Betty (12 August 1972) with cloudiness features south of the typhoon depicting outflow into the upper tropospheric easterli. es. 30. ITOS-1 satellite view of. typhoon Anita (20 August 1970) with cloudiress absent equatorward of the typhoon...

  14. Synchronous records of pCO2 and D14 C suggest rapid, ocean-derived

    E-Print Network [OSTI]

    De Boer, Agatha M.

    with the GENIE Earth System Model. We suggest that sharp transitions of pCO2 may have remained undetected so far System Model a b s t r a c t Just before the onset of the Younger Dryas (YD) cold event, several stomatal climate change Stomatal proxy Radiocarbon Younger Dryas Lateglacial Ocean flushing event GENIE Earth

  15. Transition asymptotics for the Painlevé II transcendent

    E-Print Network [OSTI]

    Thomas Bothner

    2015-02-26T23:59:59.000Z

    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 $K_{\\textnormal{Ai}}$.

  16. Rapid development of a wireless infrastructure monitoring system

    E-Print Network [OSTI]

    Brooks, James Raymond, 1973-

    2004-01-01T23:59:59.000Z

    Much academic literature exists in the fields of Product Development and Project Management. This thesis uses the framework provided by the literature to analyze a case study development project which the author led from ...

  17. Development of an advanced nanocalorimetry system for rapid material characterizations 

    E-Print Network [OSTI]

    Liu, Yen-Shan

    2007-04-25T23:59:59.000Z

    sensors, as well as any necessary electronic interconnections, and (ii) a sample encapsulation module incorporating etched enclosures designed to accommodate either solid or liquid samples. Initial work has led to successful fabrication of a chip capable...

  18. Microchemical systems for rapid optimization of organic synthesis

    E-Print Network [OSTI]

    Murphy, Edward R

    2006-01-01T23:59:59.000Z

    In the chemistry laboratory, the desire to use smaller quantities of material to minimize both reagent cost and waste generation has driven chemists to develop new experimental techniques. The current approach to small ...

  19. Rapid Conditioning for the Next Generation Melting System

    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 onYouTube YouTube Note: Since the.pdfBreakingMay 2015 < prevQuick Guide: PowerFrequency2014 | DepartmentRancherRue, Gas

  20. Rapid Freeform Sheet Metal Forming: Technology Development and System Verification

    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 onYouTube YouTube Note: Since the.pdfBreakingMay 2015 < prevQuick Guide: PowerFrequency2014 |

  1. Rapid Freeform Sheet Metal Forming: Technology Development and System Verification

    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 onYouTube YouTube Note: Since the.pdfBreakingMay 2015 < prevQuick Guide: PowerFrequency2014 |Matthew J. Zaluzec, Ford

  2. Rapid Deployment Shelter System, Application | Y-12 National Security

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeedingTechnicalPurchase, Delivery,Assistance

  3. RAPID-CURE COATINGS SYSTEM - Energy Innovation Portal

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible forPortsmouth/Paducah47,193.70COMMUNITYResponses:December 11, 2014 Page 1 of 2Industrial

  4. Rapid determination of actinides in asphalt samples

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

    Maxwell, Sherrod L.; Culligan, Brian K.; Hutchison, Jay B.

    2014-01-12T23:59:59.000Z

    A new rapid method for the determination of actinides in asphalt samples has been developed that can be used in emergency response situations or for routine analysis If a radiological dispersive device (RDD), Improvised Nuclear Device (IND) or a nuclear accident such as the accident at the Fukushima Nuclear Power Plant in March, 2011 occurs, there will be an urgent need for rapid analyses of many different environmental matrices, including asphalt materials, to support dose mitigation and environmental clean up. The new method for the determination of actinides in asphalt utilizes a rapid furnace step to destroy bitumen and organicsmore »present in the asphalt and sodium hydroxide fusion to digest the remaining sample. Sample preconcentration steps are used to collect the actinides and a new stacked TRU Resin + DGA Resin column method is employed to separate the actinide isotopes in the asphalt samples. The TRU Resin plus DGA Resin separation approach, which allows sequential separation of plutonium, uranium, americium and curium isotopes in asphalt samples, can be applied to soil samples as well.« less

  5. Rapid determination of actinides in asphalt samples

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

    Maxwell, Sherrod L.; Culligan, Brian K.; Hutchison, Jay B.

    2014-01-12T23:59:59.000Z

    A new rapid method for the determination of actinides in asphalt samples has been developed that can be used in emergency response situations or for routine analysis If a radiological dispersive device (RDD), Improvised Nuclear Device (IND) or a nuclear accident such as the accident at the Fukushima Nuclear Power Plant in March, 2011 occurs, there will be an urgent need for rapid analyses of many different environmental matrices, including asphalt materials, to support dose mitigation and environmental clean up. The new method for the determination of actinides in asphalt utilizes a rapid furnace step to destroy bitumen and organics present in the asphalt and sodium hydroxide fusion to digest the remaining sample. Sample preconcentration steps are used to collect the actinides and a new stacked TRU Resin + DGA Resin column method is employed to separate the actinide isotopes in the asphalt samples. The TRU Resin plus DGA Resin separation approach, which allows sequential separation of plutonium, uranium, americium and curium isotopes in asphalt samples, can be applied to soil samples as well.

  6. Dynamic Analysis of Fuel Cycle Transitioning

    SciTech Connect (OSTI)

    Brent Dixon; Steve Piet; David Shropshire; Gretchen Matthern

    2009-09-01T23:59:59.000Z

    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.

  7. Fabrication of highly textured lithium cobalt oxide films by rapid thermal annealing

    DOE Patents [OSTI]

    Bates, John B. (Marietta, GA)

    2003-04-29T23:59:59.000Z

    Systems and methods are described for fabrication of highly textured lithium cobalt oxide films by rapid thermal annealing. A method of forming a lithium cobalt oxide film includes depositing a film of lithium cobalt oxide on a substrate; rapidly heating the film of lithium cobalt oxide to a target temperature; and maintaining the film of lithium cobalt oxide at the target temperature for a target annealing time of at most, approximately 60 minutes. The systems and methods provide advantages because they require less time to implement and are, therefore less costly than previous techniques.

  8. Fabrication of highly textured lithium cobalt oxide films by rapid thermal annealing

    DOE Patents [OSTI]

    Bates, John B. (Marietta, GA)

    2002-01-01T23:59:59.000Z

    Systems and methods are described for fabrication of highly textured lithium cobalt oxide films by rapid thermal annealing. A method of forming a lithium cobalt oxide film includes depositing a film of lithium cobalt oxide on a substrate; rapidly heating the film of lithium cobalt oxide to a target temperature; and maintaining the film of lithium cobalt oxide at the target temperature for a target annealing time of at most, approximately 60 minutes. The systems and methods provide advantages because they require less time to implement and are, therefore less costly than previous techniques.

  9. Fabrication of highly textured lithium cobalt oxide films by rapid thermal annealing

    DOE Patents [OSTI]

    Bates, John B.

    2003-05-13T23:59:59.000Z

    Systems and methods are described for fabrication of highly textured lithium cobalt oxide films by rapid thermal annealing. A method of forming a lithium cobalt oxide film includes depositing a film of lithium cobalt oxide on a substrate; rapidly heating the film of lithium cobalt oxide to a target temperature; and maintaining the film of lithium cobalt oxide at the target temperature for a target annealing time of at most, approximately 60 minutes. The systems and methods provide advantages because they require less time to implement and are, therefore less costly than previous techniques.

  10. Effect of dimensionality on vapor-liquid phase transition

    SciTech Connect (OSTI)

    Singh, Sudhir Kumar, E-mail: sksingh@thapar.edu [Department Chemical Engineering, Thapar University, Patiala-147004 Punjab (India)

    2014-04-24T23:59:59.000Z

    Dimensionality play significant role on ‘phase transitions’. Fluids in macroscopic confinement (bulk or 3-Dimensional, 3D) do not show significant changes in their phase transition properties with extent of confinement, since the number of molecules away from the surrounding surfaces is astronomically higher than the number of molecules in close proximity of the confining surfaces. In microscopic confinement (quasi 3D to quasi-2D), however, the number of molecules away from the close proximity of the surface is not as high as is the case with macroscopic (3D) confinement. Hence, under the same thermodynamic conditions ‘phase transition’ properties at microscopic confinement may not remain the same as the macroscopic or 3D values. Phase transitions at extremely small scale become very sensitive to the dimensions as well as the surface characteristics of the system. In this work our investigations reveal the effect of dimensionality on the phase transition from 3D to quasi-2D to 2D behavior. We have used grand canonical transition matrix Monte Carlo simulation to understand the vapor–liquid phase transitions from 3D to quasi-2D behavior. Such studies can be helpful in understanding and controlling the fluid film behaviour confined between solid surfaces of few molecular diameters, for example, in lubrication applications.

  11. No variations in transit times for Qatar-1 b

    E-Print Network [OSTI]

    Maciejewski, G; Aceituno, F J; Ohlert, J; Puchalski, D; Dimitrov, D; Seeliger, M; Kitze, M; Raetz, St; Errman, R; Gilbert, H; Pannicke, A; Schmidt, J -G; Neuhäuser, R

    2015-01-01T23:59:59.000Z

    The transiting hot Jupiter planet Qatar-1 b was presented to exhibit variations in transit times that could be of perturbative nature. A hot Jupiter with a planetary companion on a nearby orbit would constitute an unprecedented planetary configuration, important for theories of formation and evolution of planetary systems. We performed a photometric follow-up campaign to confirm or refute transit timing variations. We extend the baseline of transit observations by acquiring 18 new transit light curves acquired with 0.6-2.0 m telescopes. These photometric time series, together with data available in the literature, were analyzed in a homogenous way to derive reliable transit parameters and their uncertainties. We show that the dataset of transit times is consistent with a linear ephemeris leaving no hint for any periodic variations with a range of 1 min. We find no compelling evidence for the existence of a close-in planetary companion to Qatar-1 b. This finding is in line with a paradigm that hot Jupiters are...

  12. Crossover transition in bag-like models

    E-Print Network [OSTI]

    Ferroni, Lorenzo

    2009-01-01T23:59:59.000Z

    DE-AC02-05CH11231 Crossover transition in bag-like models L.We show that a crossover transition qualitatively similar toI. INTRODUCTION The phase transition of strongly interacting

  13. Ising model: secondary phase transition

    E-Print Network [OSTI]

    You-gang Feng

    2012-04-09T23:59:59.000Z

    Lttice-spin phonons are considered, which make the heat capacity at the critical temperature satisfy experimental observations better. There is a BEC phase transition in an Ising model attributable to the lattice-spin phonons. We proved that the spin-wave theory only is available after BEC transition, and the magnons have the same characteristics as the lattice-spin phonons', resulting from quantum effect. Energy-level overlap effect at ultralow temperature is found. A prediction of BEC phase transition in a crystal is put forward as our theory generalization.

  14. Phase Transitions in the LiNi0.5Mn0.5O2 System with Temperature Yoyo Hinuma, Ying S. Meng, Kisuk Kang, and Gerbrand Ceder*

    E-Print Network [OSTI]

    Ceder, Gerbrand

    of the energy on the arrangement of Li+ , Ni2+ , and Mn4+ in the lithium layer and transition metal layer. First represents magnetic interactions than standard GGA. The simulation results suggest two phase with this material. Other properties of the material, such as thermal stability and safety, have also been

  15. Rounding of the localization transition in model porous media

    E-Print Network [OSTI]

    Simon K. Schnyder; Markus Spanner; Felix Höfling; Thomas Franosch; Jürgen Horbach

    2014-11-07T23:59:59.000Z

    The generic mechanisms of anomalous transport in porous media are investigated by computer simulations of two-dimensional model systems. In order to bridge the gap between the strongly idealized Lorentz model and realistic models of porous media, two models of increasing complexity are considered: a cherry-pit model with hard-core correlations as well as a soft-potential model. An ideal gas of tracer particles inserted into these structures is found to exhibit anomalous transport which extends up to several decades in time. Also, the self-diffusion of the tracers becomes suppressed upon increasing the density of the systems. These phenomena are attributed to an underlying percolation transition. In the soft potential model the transition is rounded, since each tracer encounters its own critical density according to its energy. Therefore, the rounding of the transition is a generic occurrence in realistic, soft systems.

  16. Vehicle Technologies Office: Transitioning the Transportation...

    Energy Savers [EERE]

    Transitioning the Transportation Sector - Exploring the Intersection of H2 Fuel Cell and Natural Gas Vehicles Vehicle Technologies Office: Transitioning the Transportation Sector -...

  17. Transition Strategies for 2006 and 2007

    Broader source: Energy.gov [DOE]

    Presentation on Transition Strategies given by Sigmund Gronich of the U.S. Department of Energy during the DOE Hydrogen Transition Analysis Workshop on January 26, 2006.

  18. Category:RAPID Forms | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, click here. Category:Conceptual ModelListsPolitical ActionQuantitativeThisRAPID

  19. RAPID/Roadmap/17 | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form History Facebook iconQuito, Ecuador: EnergyRAPID/Roadmap/12-FD-h-CO-a

  20. RAPID/Roadmap/5 | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form History Facebook iconQuito, Ecuador:RAPID/Roadmap/19-CO-c <dg <

  1. RRTT - Rapid Response Team for Transmission

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

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn April 23, 2014, an OHASeptember 2010In addition to 1 |D I S P URFIof Clean EnergyRapid

  2. RAPID/Roadmap/Geothermal | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f < RAPID‎ | Roadmap Jump to:b < RAPID‎ |RAPID/Roadmap/Geothermal

  3. Rapid Scan AERI Observations: Benefits and Analysis

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Radiation ProtectionRaising funds for a cureEnergy StorageRapid Scan

  4. RAPID/About | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I GeothermalPotentialBiopowerSolidGenerationMethod JumpGeorgia: Energy Resources JumpRAM CapitalRAPID/About

  5. RAPID/Outreach | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I GeothermalPotentialBiopowerSolidGenerationMethodInformation Texas <Field <NewRAPID/Outreach <

  6. RAPID/Overview | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I GeothermalPotentialBiopowerSolidGenerationMethodInformation Texas <Field <NewRAPID/Outreach

  7. RAPID/Roadmap/14 | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I GeothermalPotentialBiopowerSolidGenerationMethodInformation TexasTexas)ID-a <RAPID/Roadmap/14 <

  8. RAPID/Roadmap/9 | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I GeothermalPotentialBiopowerSolidGenerationMethodInformatione <RAPID/Roadmap/7-FD-kc < <

  9. RAPID/Roadmap/Coverage | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I GeothermalPotentialBiopowerSolidGenerationMethodInformatione <RAPID/Roadmap/7-FD-kcFD-i

  10. RAPID/Roadmap/Geo | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I GeothermalPotentialBiopowerSolidGenerationMethodInformatione <RAPID/Roadmap/7-FD-kcFD-iGeo <

  11. RAPID/Solar | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I GeothermalPotentialBiopowerSolidGenerationMethodInformatione <RAPID/Roadmap/7-FD-kcFD-iGeo

  12. Feeding the Transition Dairy Cow 

    E-Print Network [OSTI]

    Stokes, Sandra R.

    1999-09-20T23:59:59.000Z

    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...

  13. Rapid prototyping in early stages of architectural design

    E-Print Network [OSTI]

    Simondetti, Alvise

    1997-01-01T23:59:59.000Z

    This thesis shows how architects can use Rapid Prototyping and what the advantages and disadvantages are in different manipulations of the tool. Chapter two attempts to chart a road map of the rapid prototyping media. The ...

  14. Colloidal Glass Transition Observed in Confinement Carolyn R. Nugent,* Kazem V. Edmond, Hetal N. Patel, and Eric R. Weeks

    E-Print Network [OSTI]

    Weeks, Eric R.

    Colloidal Glass Transition Observed in Confinement Carolyn R. Nugent,* Kazem V. Edmond, Hetal N suspension confined between two quasiparallel walls as a model system for glass transitions in confined. For higher volume fraction samples (closer to the glass transition), the onset of confinement effects occurs

  15. Phase transitions for N-electron atoms at the large-dimension limit Pablo Serra* and Sabre Kais

    E-Print Network [OSTI]

    Kais, Sabre

    that involve a nonzero latent heat and radical change of the structure of the material at the transition points. Second- order phase transitions are continuous phase changes where the properties of the system doPhase transitions for N-electron atoms at the large-dimension limit Pablo Serra* and Sabre Kais

  16. Transition Time Bounded Low-power Clock Tree Construction Min Pan, Chris Chong-Nuen Chu and J. Morris Chang

    E-Print Network [OSTI]

    Chu, Chris C.-N.

    Transition Time Bounded Low-power Clock Tree Construction Min Pan, Chris Chong-Nuen Chu and J is the signal with the highest frequency in the whole system, which makes the transition time bound of the clock signal extremely tight. Hence, it is necessary to have transition time bounds to construct low

  17. Quantum phase transition between cluster and antiferromagnetic states

    E-Print Network [OSTI]

    Wonmin Son; Luigi Amico; Rosario Fazio; Alioscia Hamma; Saverio Pascazio; Vlatko Vedral

    2011-09-11T23:59:59.000Z

    We study a Hamiltonian system describing a three spin-1/2 cluster-like interaction competing with an Ising-like exchange. We show that the ground state in the cluster phase possesses symmetry protected topological order. A continuous quantum phase transition occurs as result of the competition between the cluster and Ising terms. At the critical point the Hamiltonian is self-dual. The geometric entanglement is also studied. Our findings in one dimension corroborate the analysis of the two dimensional generalization of the system, indicating, at a mean field level, the presence of a direct transition between an antiferromagnetic and a valence bond solid ground state.

  18. Light curves from rapidly rotating neutron stars

    E-Print Network [OSTI]

    Numata, Kazutoshi

    2010-01-01T23:59:59.000Z

    We calculate light curves produced by a hot spot of a rapidly rotating neutron star, assuming that the spot is perturbed by a core $r$-mode, which is destabilized by emitting gravitational waves. To calculate light curves, we take account of relativistic effects such as the Doppler boost due to the rapid rotation and light bending assuming the Schwarzschild metric around the neutron star. We assume that the core $r$-modes penetrate to the surface fluid ocean to have sufficiently large amplitudes to disturb the spot. For a $l'=m$ core $r$-mode, the oscillation frequency $\\omega\\approx2m\\Omega/[l'(l'+1)]$ defined in the co-rotating frame of the star will be detected by a distant observer, where $l'$ and $m$ are respectively the spherical harmonic degree and the azimuthal wave number of the mode, and $\\Omega$ is the spin frequency of the star. In a linear theory of oscillation, using a parameter $A$ we parametrize the mode amplitudes such that ${\\rm max}\\left(|\\xi_\\theta|,|\\xi_\\phi|\\right)/R=A$ at the surface, w...

  19. Two glass transitions in miscible polymer blends?

    SciTech Connect (OSTI)

    Dudowicz, Jacek; Freed, Karl F. [The James Franck Institute and the Department of Chemistry, The University of Chicago, Chicago, Illinois 60637 (United States); Douglas, Jack F. [Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)

    2014-06-28T23:59:59.000Z

    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.

  20. Zemax simulations of diffraction and transition radiation

    E-Print Network [OSTI]

    Aumeyr, T; Bobb, L M; Bolzon, B; Lefevre, T; Mazzoni, S; Billing, M G

    2013-01-01T23:59:59.000Z

    Diffraction Radiation (DR) and Transition Radiation (TR) are produced when a relativistic charged particle moves in the vicinity of a medium or through a medium respectively. The target atoms are polarised by the electric field of the charged particle, which then oscillate thus emitting radiation with a very broad spectrum. The spatialspectral properties of DR/TR are sensitive to various electron beam parameters. Several projects aim to measure the transverse (vertical) beam size using DR or TR. This paper reports on how numerical simulations using Zemax can be used to study such a system.

  1. Optical pumping via incoherent Raman transitions

    E-Print Network [OSTI]

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

    2007-10-04T23:59:59.000Z

    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.

  2. Geometric Critical Exponents in Classical and Quantum Phase Transitions

    E-Print Network [OSTI]

    Prashant Kumar; Tapobrata Sarkar

    2014-11-02T23:59:59.000Z

    We define geometric critical exponents for systems that undergo continuous second order classical and quantum phase transitions. These relate scalar quantities on the information theoretic parameter manifolds of such systems, near criticality. We calculate these exponents by approximating the metric and thereby solving geodesic equations analytically, near curvature singularities of two dimensional parameter manifolds. The critical exponents are seen to be the same for both classical and quantum systems that we consider, and we provide evidence about the possible universality of our results.

  3. Demographics of Transition Discs in Ophiuchus and Taurus

    E-Print Network [OSTI]

    Najita, Joan R; Muzerolle, James

    2015-01-01T23:59:59.000Z

    Transition disc systems are young stars that appear to be on the verge of dispersing their protoplanetary discs. We explore the nature of these systems by comparing the stellar accretion rates and disc masses of transition discs and normal T Tauri stars in Taurus and Ophiuchus. After controlling for the known dependencies of stellar accretion rate and disc mass and on age, stellar accretion rate on stellar mass, and disc mass on the presence of stellar or sub-stellar companions, we find that the normal T Tauri stars show a trend of stellar accretion rate increasing with disc mass. The transition discs tend to have higher average disc masses than normal T Tauri stars as well as lower accretion rates than normal T Tauri stars of the same disc mass. These results are most consistent with the interpretation that the transition discs have formed objects massive enough to alter the accretion flow, i.e., single or multiple giant planets. Several Ophiuchus T Tauri stars that are not known transition disc systems also...

  4. Applying Bayesian belief networks in rapid response situations

    SciTech Connect (OSTI)

    Gibson, William L [Los Alamos National Laboratory; Deborah, Leishman, A. [Los Alamos National Laboratory; Van Eeckhout, Edward [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    The authors have developed an enhanced Bayesian analysis tool called the Integrated Knowledge Engine (IKE) for monitoring and surveillance. The enhancements are suited for Rapid Response Situations where decisions must be made based on uncertain and incomplete evidence from many diverse and heterogeneous sources. The enhancements extend the probabilistic results of the traditional Bayesian analysis by (1) better quantifying uncertainty arising from model parameter uncertainty and uncertain evidence, (2) optimizing the collection of evidence to reach conclusions more quickly, and (3) allowing the analyst to determine the influence of the remaining evidence that cannot be obtained in the time allowed. These extended features give the analyst and decision maker a better comprehension of the adequacy of the acquired evidence and hence the quality of the hurried decisions. They also describe two example systems where the above features are highlighted.

  5. Rapid automatic NCS identification using heavy-atom substructures

    SciTech Connect (OSTI)

    Terwilliger, Thomas C., E-mail: terwilliger@lanl.gov [Mail Stop M888, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

    2002-12-01T23:59:59.000Z

    A rapid algorithm for identifying NCS in heavy-atom sites is described. An important component of a fully automated system for structure solution and phase improvement through density modification is a capability for identification of non-crystallographic symmetry as early in the process as possible. Algorithms exist for finding NCS in heavy-atom sites, but currently require of the order of N{sup 5} comparisons to be made, where N is the number of sites to be examined, including crystallographically related locations. A method described here based on considering only sets of sites that have common interatomic distances reduces the computational time by several orders of magnitude. Additionally, searches for proper symmetry allow the identification of NCS in cases where only one heavy atom is present per NCS copy.

  6. On the existence of vapor-liquid phase transition in dusty plasmas

    SciTech Connect (OSTI)

    Kundu, M.; Sen, A.; Ganesh, R. [Institute for Plasma Research, Bhat, Gandhinagar 382 428, Gujarat (India); Avinash, K. [Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India)

    2014-10-15T23:59:59.000Z

    The phenomenon of phase transition in a dusty-plasma system (DPS) has attracted some attention in the past. Earlier Farouki and Hamaguchi [J. Chem. Phys. 101, 9876 (1994)] have demonstrated the existence of a liquid to solid transition in DPS where the dust particles interact through a Yukawa potential. However, the question of the existence of a vapor-liquid (VL) transition in such a system remains unanswered and relatively unexplored so far. We have investigated this problem by performing extensive molecular dynamics simulations which show that the VL transition does not have a critical curve in the pressure versus volume diagram for a large range of the Yukawa screening parameter ? and the Coulomb coupling parameter ?. Thus, the VL phase transition is found to be super-critical, meaning that this transition is continuous in the dusty plasma model given by Farouki and Hamaguchi. We provide an approximate analytic explanation of this finding by means of a simple model calculation.

  7. Temperature-dependent phase transitions of a complex biological membrane in zeptoliter volumes

    SciTech Connect (OSTI)

    Nikiforov, Maxim [ORNL; Hohlbauch, Sophia [Asylum Research, Santa Barbara, CA; King, William P [University of Illinois, Urbana-Champaign; Voitchovsky, K [Massachusetts Institute of Technology (MIT); Contera, S Antoranz [University of Oxford; Jesse, Stephen [ORNL; Kalinin, Sergei V [ORNL; Proksch, Roger [Asylum Research, Santa Barbara, CA

    2011-01-01T23:59:59.000Z

    Phase transitions in purple membrane have been a topic of debate for the past two decades. In this work we present studies of a reversible transition of purple membrane in the 50 60 C range in zeptoliter volumes under different heating regimes (global heating and local heating). The temperature of the reversible phase transition is 52 5 C for both local and global heating, supporting the hypothesis that this transition is mainly due to a structural rearrangement of bR molecules and trimers. To achieve high resolution measurements of temperature-dependent phase transitions, a new scanning probe microscopy-based method was developed. We believe that our new technique can be extended to other biological systems and can contribute to the understanding of inhomogeneous phase transitions in complex systems.

  8. Cite this: Lab Chip, 2013, 13, 2922 Rapid fabrication of pressure-driven open-channel

    E-Print Network [OSTI]

    Chen, Yiling

    Cite this: Lab Chip, 2013, 13, 2922 Rapid fabrication of pressure-driven open-channel microfluidic of pressure-driven, open-channel microfluidic systems with lateral dimensions of 45­300 microns carved to control fluid flow. Introduction Microfluidic paper-based analytical devices (mPADs),1­7 in which aqueous

  9. Earth Observations for rapid response to large earthquakes Supervisors: Dr Zhenhong Li and Prof Trevor Hoey

    E-Print Network [OSTI]

    Guo, Zaoyang

    Earth Observations for rapid response to large earthquakes Supervisors: Dr Zhenhong Li and Prof Trevor Hoey School of Geographical and Earth Sciences, University of Glasgow, UK Earthquakes, together of the earth system; they are messengers of the fundamental processes that shape the surface of the Earth

  10. IEEE TRANSACTIONS ON ROBOTICS 1 Needle Steering in 3D via Rapid Replanning

    E-Print Network [OSTI]

    Alterovitz, Ron

    Plan Execute Control PredictionActual Model Generate Multiple Plans Fig. 1. Closed-loop needle steeringIEEE TRANSACTIONS ON ROBOTICS 1 Needle Steering in 3D via Rapid Replanning Sachin Patil Member steering system capable of automatically reaching targets in 3D environments while avoiding obstacles

  11. he agricultural sector is rapidly being trans-formed into an industry of major importance

    E-Print Network [OSTI]

    Antsaklis, Panos

    T he agricultural sector is rapidly being trans- formed into an industry of major importance, with superior performance in most cases. To manage the increasing complexity of agricultural systems agri- culture, where the goal is to improve the efficiency of opera- tion of agricultural enterprises

  12. EVALUATION OF THE RECTANGULAR RAPID FLASH BEACON AT A PINELLAS TRAIL CROSSING IN ST. PETERSBURG, FLORIDA

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    rectangular yellow LED indicators which flash rapidly in a wig-wag sequence. It is solar-powered, radio controlled, and activated by trail users. The experimental design was to collect data of trail users before of more benefit would be periodic police enforcement operations, or the development of a passive system

  13. Rapid, Active Hair Bundle Movements in Hair Cells from the Bullfrog's Sacculus

    E-Print Network [OSTI]

    Hudspeth, A. James

    Rapid, Active Hair Bundle Movements in Hair Cells from the Bullfrog's Sacculus Michael E. Benser Neuroscience, The Rockefeller University, New York, New York 10021 Hair bundles, the mechanically sensitive organelles of hair cells in the auditory and vestibular systems, are elastic structures that are deflected

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

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2010-01-01T23:59:59.000Z

    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. RAPID DETERMINATION OF RADIOSTRONTIUM IN SEAWATER SAMPLES

    SciTech Connect (OSTI)

    Maxwell, S.

    2013-01-16T23:59:59.000Z

    A new method for the determination of radiostrontium in seawater samples has been developed at the Savannah River National Laboratory (SRNL) that allows rapid preconcentration and separation of strontium and yttrium isotopes in seawater samples for measurement. The new SRNL method employs a novel and effective pre-concentration step that utilizes a blend of calcium phosphate with iron hydroxide to collect both strontium and yttrium rapidly from the seawater matrix with enhanced chemical yields. The pre-concentration steps, in combination with rapid Sr Resin and DGA Resin cartridge separation options using vacuum box technology, allow seawater samples up to 10 liters to be analyzed. The total {sup 89}Sr + {sup 90}Sr activity may be determined by gas flow proportional counting and recounted after ingrowth of {sup 90}Y to differentiate {sup 89}Sr from {sup 90}Sr. Gas flow proportional counting provides a lower method detection limit than liquid scintillation or Cerenkov counting and allows simultaneous counting of samples. Simultaneous counting allows for longer count times and lower method detection limits without handling very large aliquots of seawater. Seawater samples up to 6 liters may be analyzed using Sr Resin for {sup 89}Sr and {sup 90}Sr with a Minimum Detectable Activity (MDA) of 1-10 mBq/L, depending on count times. Seawater samples up to 10 liters may be analyzed for {sup 90}Sr using a DGA Resin method via collection and purification of {sup 90}Y only. If {sup 89}Sr and other fission products are present, then {sup 91}Y (beta energy 1.55 MeV, 58.5 day half-life) is also likely to be present. {sup 91}Y interferes with attempts to collect {sup 90}Y directly from the seawater sample without initial purification of Sr isotopes first and {sup 90}Y ingrowth. The DGA Resin option can be used to determine {sup 90}Sr, and if {sup 91}Y is also present, an ingrowth option with using DGA Resin again to collect {sup 90}Y can be performed. An MDA for {sup 90}Sr of <1 mBq/L for an 8 hour count may be obtained using 10 liter seawater sample aliquots.

  16. Transition Path Theory E. Vanden-Eijnden

    E-Print Network [OSTI]

    Van Den Eijnden, Eric

    Transition Path Theory E. Vanden-Eijnden Courant Institute of Mathematical Sciences, New York University New York, NY 10012 eve2cims.nyu.edu Eric Vanden-Eijnden E. Vanden-Eijnden: Transition Path Theory of the Current and Transition Tubes . . . . . . . . . . . . . . . . . . . . . . 451 5 Comparison with Transition

  17. 12 August 2005 Observing Optical Transition

    E-Print Network [OSTI]

    Anlage, Steven

    12 August 2005 Observing Optical Transition Radiation from 10keV Electrons 1 #12;12 August 2005 Observing Optical Transition Radiation from 10keV Electrons 2 #12;12 August 2005 Observing Optical Transition Radiation from 10keV Electrons 3 #12;12 August 2005 Observing Optical Transition Radiation from 10

  18. Fluctuations in systemsFluctuations in systems with superconducting islandswith superconducting islands

    E-Print Network [OSTI]

    Fominov, Yakov

    Fluctuations in systemsFluctuations in systems with superconducting islandswith superconductingTwo mechanism of TTcc suppressionsuppression #12;SuperconductingSuperconductingmetal transitionsmetal: Superconductive transitionGrains: Superconductive transition #12;Islands on a film: what's the difference

  19. Metals Production Requirements for Rapid Photovoltaics Deployment

    E-Print Network [OSTI]

    Kavlak, Goksin; Jaffe, Robert L; Trancik, Jessika E

    2015-01-01T23:59:59.000Z

    If global photovoltaics (PV) deployment grows rapidly, the required input materials need to be supplied at an increasing rate. In this paper, we quantify the effect of PV deployment levels on the scale of metals production. For example, we find that if cadmium telluride {copper indium gallium diselenide} PV accounts for more than 3% {10%} of electricity generation by 2030, the required growth rates for the production of indium and tellurium would exceed historically-observed production growth rates for a large set of metals. In contrast, even if crystalline silicon PV supplies all electricity in 2030, the required silicon production growth rate would fall within the historical range. More generally, this paper highlights possible constraints to the rate of scaling up metals production for some PV technologies, and outlines an approach to assessing projected metals growth requirements against an ensemble of past growth rates from across the metals production sector. The framework developed in this paper may be...

  20. Rapidly Moving Divertor Plates In A Tokamak

    SciTech Connect (OSTI)

    S. Zweben

    2011-05-16T23:59:59.000Z

    It may be possible to replace conventional actively cooled tokamak divertor plates with a set of rapidly moving, passively cooled divertor plates on rails. These plates would absorb the plasma heat flux with their thermal inertia for ~10-30 sec, and would then be removed from the vessel for processing. When outside the tokamak, these plates could be cooled, cleaned, recoated, inspected, and then returned to the vessel in an automated loop. This scheme could provide nearoptimal divertor surfaces at all times, and avoid the need to stop machine operation for repair of damaged or eroded plates. We describe various possible divertor plate designs and access geometries, and discuss an initial design for a movable and removable divertor module for NSTX-U.

  1. Autonomous dial-a-ride transit: Technical overview

    SciTech Connect (OSTI)

    NONE

    1998-11-01T23:59:59.000Z

    Is autonomous-dial-a-ride (ADART) an idea whose time has come with the advent of technologies. This report describes the essential features of an experimental ADART service and establishes a context for ADART implementation based on urban transit industry characteristics. ADART is a demand-responsive transit service with fully automated dispatching and autonomously managed vehicles carrying all command-and-control facilities onboard. This technical overview consists of four chapters/papers. It begins with an introductory overview of ADART, followed by deliberations on the prospects for ADART implementation in terms of historical precedent, logistics, and costs. The third and fourth chapters review the state-of-the-art of technologies crucial to ADART operations--mobile communications and vehicle navigation hardware and software systems. The final chapters present study conclusions. ADART is a flexible system that may be the answer for transit services to low-density areas.

  2. Measuring Cost Variability in Provision of Transit Service

    E-Print Network [OSTI]

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

    2010-01-01T23:59:59.000Z

    Comprehensive Transit Performance Indicators. UCTC WorkingModal Transit Performance Indicators. Ph.D. dissertation.

  3. An Information And Institutional Inventory Of California Transit Agencies

    E-Print Network [OSTI]

    Hickman, Mark; Day, Theodore

    1996-01-01T23:59:59.000Z

    Salinas Transit 1 Ryan Ranch Road Monterey CA 93940 Jim Andrew, Interim Transit Manager Morongo Basin

  4. Quark condensates and the deconfinement transition

    E-Print Network [OSTI]

    Christian S. Fischer; Jens A. Mueller

    2009-08-18T23:59:59.000Z

    In this talk we present results on the chiral and the deconfinement transition of quenched QCD from Dyson-Schwinger equations. We determine the ordinary quark condensate signaling the chiral transition and the dual quark condensate signaling the deconfinement transition from the Landau gauge quark propagator evaluated at generalized boundary conditions. We find only slightly different transition temperatures at finite quark masses, whereas the transition temperatures coincide in the chiral limit.

  5. Particle rapidity distribution in proton-nucleus collisions using the proton-contributor reference frame

    E-Print Network [OSTI]

    Gines Martinez-Garcia

    2014-08-14T23:59:59.000Z

    I define the proton-contributor reference frame in proton nucleus (p--A) collisions as the center of mass of the system formed by the proton and the participant nucleons of the nucleus. Assuming that the rapidity distribution of produced particles is symmetric in the proton-contributor reference frame, several measurements in p-Pb collisions at $\\sqrt{s_{\\rm NN}} = 5.02 {\\rm TeV}$ can be described qualitatively. These include rapidity distributions of charged particles, $J/\\psi$ and Z bosons.

  6. Rapid disappearance of shell effects in the fission of transfermium nuclei

    SciTech Connect (OSTI)

    Hulet, E.K.

    1983-01-01T23:59:59.000Z

    In the last fifteen years we have learned that nuclear shells have a very broad and pervasive impact on the fission process. In the first few decades after the discovery of nuclear fission, the nucleus was treated as a drop of liquid with smoothly varying attractive and repulsive forces. Although this model still forms the underlying basis for fission, we also observe large effects from the superimposition of shell corrections derived from coupling the quantum states of individual nucleons. The consequences of single-particle coupling on the fission process can be striking and may often overshadow that originating from the intrinsic liquid-drop component. Here, we point out several major features attributable to shell effects in the spontaneous fission (SF) of the lighter actinides, the sudden transition to symmetric fission in the fermium isotopes, and finally new experimental information indicating another transition in the SF of transfermium nuclides due to the disappearance of shell perturbations. In each transition, the abruptness is surprising, and for the moment, such rapid changes in fission behavior lack a theoretical rationale.

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

    E-Print Network [OSTI]

    Thomas J. Maccarone

    2003-08-02T23:59:59.000Z

    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.

  8. Rapid Spontaneous Assembly of Single Component Liposomes

    E-Print Network [OSTI]

    P. Sunthar; Sopan M. Phapal

    2015-01-28T23:59:59.000Z

    Can single component bilayer forming surfactants spontaneously assemble to form unilamellar vesicles of a definite size ? Although possible by Helfrich's theory, this has not been observed without external forcing. We show two variants of a method where this is possible without any input of external energy, with the time of synthesis reduced to as less as 15 minutes. It is shown that the average diameter of the liposomes formed is intrinsic and depends only on the temperature and the lipid type, eliminating kinetic effects normally observed. This thus can be a candidate mechanism for vesicle size selection in pre-biotic conditions. The method may also be suitable to study time-resolved studies of micelle to vesicle transition.

  9. Adhesion Transition of Flexible Sheets

    E-Print Network [OSTI]

    Arthur A. Evans; Eric Lauga

    2009-05-31T23:59:59.000Z

    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.

  10. LAMPF transition-region mechanical fabrication

    SciTech Connect (OSTI)

    Bush, E.D. Jr.; Gallegos, J.D.F.; Harrison, R.; Hart, V.E.; Hunter, W.T.; Rislove, S.E.; Sims, J.R.; Van Dyke, W.J.

    1984-07-01T23:59:59.000Z

    The primary purpose of the new Transition Region (TR-II) is to optimize the phase matching of the H/sup +/ and H/sup -/ beams during simultaneous transport. TR-II incorporates several design improvements that include larger aperture, a straight beam track, greater beam-path length adjustments, and utility lines integrated with the support system. The close pack density of magnets and beam-line hardware required innovative solutions to magnet design and mounting, vacuum manifolding, and utility routing. Critical magnet placement was accomplished using a new three-dimensional alignment system that does real-time vector calculations on a computer with input from two digital theodolites. All assembly and a large fraction of the mechanical fabrication were done by LAMPF personnel. The TR-II has been operational since September 1983 and routinely transports production beams up to 900-..mu..A current with no major problems.

  11. Predicting the Yields of Photometric Surveys for Transiting Planets

    E-Print Network [OSTI]

    Thomas G. Beatty

    2008-07-01T23:59:59.000Z

    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.

  12. Cosmological first-order phase transitions beyond the standard inflationary scenario

    E-Print Network [OSTI]

    Rakic, Aleksandar; Adamek, Julian; Niemeyer, Jens C

    2009-01-01T23:59:59.000Z

    Motivated by cosmological first-order phase transitions we examine the nucleation and evolution of vacuum bubbles in non-vacuum environments. Non-standard backgrounds can be relevant in the context of rapid tunneling processes on the landscape. Utilising complex time methods, we show that tunneling rates can be notably modified in the case of dynamical FRW backgrounds. We give a classification of the importance of the effect in terms of the relevant dynamical time scales. For both the bubble nucleation and evolution analysis we make use of the thin-wall approximation. From the classical bubble evolution on homogeneous matter backgrounds via the junction method, we find that the inflation of vacuum bubbles is very sensitive to the presence of ambient matter and quantify this statement. We also employ inhomogeneous matter models (LTB) and models that undergo a rapid phase transition (FRW) as a background and discuss in which cases potentially observable imprints on the bubble trajectory can remain.

  13. Cosmological first-order phase transitions beyond the standard inflationary scenario

    E-Print Network [OSTI]

    Aleksandar Rakic; Dennis Simon; Julian Adamek; Jens C. Niemeyer

    2009-12-11T23:59:59.000Z

    Motivated by cosmological first-order phase transitions we examine the nucleation and evolution of vacuum bubbles in non-vacuum environments. Non-standard backgrounds can be relevant in the context of rapid tunneling processes on the landscape. Utilising complex time methods, we show that tunneling rates can be notably modified in the case of dynamical FRW backgrounds. We give a classification of the importance of the effect in terms of the relevant dynamical time scales. For both the bubble nucleation and evolution analysis we make use of the thin-wall approximation. From the classical bubble evolution on homogeneous matter backgrounds via the junction method, we find that the inflation of vacuum bubbles is very sensitive to the presence of ambient matter and quantify this statement. We also employ inhomogeneous matter models (LTB) and models that undergo a rapid phase transition (FRW) as a background and discuss in which cases potentially observable imprints on the bubble trajectory can remain.

  14. Ideal quantum glass transitions: Many-body localization without quenched disorder

    SciTech Connect (OSTI)

    Schiulaz, M. [International School for Advanced Studies (SISSA), via Bonomea 265, 34136 Trieste (Italy); Müller, M. [The Abdus Salam International Center for Theoretical Physics, Strada Costiera 11, 34151 Trieste (Italy)

    2014-08-20T23:59:59.000Z

    We explore the possibility for translationally invariant quantum many-body systems to undergo a dynamical glass transition, at which ergodicity and translational invariance break down spontaneously, driven entirely by quantum effects. In contrast to analogous classical systems, where the existence of such an ideal glass transition remains a controversial issue, a genuine phase transition is predicted in the quantum regime. This ideal quantum glass transition can be regarded as a many-body localization transition due to self-generated disorder. Despite their lack of thermalization, these disorder-free quantum glasses do not possess an extensive set of local conserved operators, unlike what is conjectured for many-body localized systems with strong quenched disorder.

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

    E-Print Network [OSTI]

    for early warning signals that integrates multiple sources of information and data about the system throughEarly Warning Signals for Critical Transitions: A Generalized Modeling Approach Steven J. Lade a previously published fisheries model. We regard our method as complementary to existing early warning signals

  16. Expert systems in transportation

    SciTech Connect (OSTI)

    O'Leary, K.P.

    1988-01-01T23:59:59.000Z

    The 5 papers in the report deal with the following areas: Knowledge representation and software selection for expert-systems design; Expert-system architecture for retaining-wall design; Development of expert-systems technology in the California Department of Transportation; Development of an expert system to assist in the interactive graphic transit system design process; Expert systems development for contingency transportation planing.

  17. Office of Technology Transitions

    Broader source: Energy.gov [DOE]

    DOE's Technology Commercialization activities in 2009-13 have involved three broad areas of focus. The primary focus of technology commercialization has continued to be through new technologies developed at the National Laboratories and Facilities. As a second focus, to support and streamline commercialization of these DOE technologies, DOE has carried out a number of new initiatives and pilot projects. Finally, DOE's Department-wide commitment to using commercialization as one mechanism to support U.S. economic growth has led to new cross-cutting programs. U.S. Department of Energy researchers won 31 of the 100 awards in 2014, 36 awards in each of 2013, 2012 and 2011, and 46 in 2010, for a total of 185 over the period of 2009-13. A subset of these awards and other DOE developed technologies are described in Appendix E. These represent a spectrum of commercial areas including DOE mission areas of energy, efficiency, environment and security, as well as spin-off applications in the agricultural, aeronautical, medical, semiconductor and information technology industries, and broad applications in cyber security and sensing/control systems.

  18. Analysis of a Transit Bus as Probe Vehicle for Arterial Performance Measurement

    E-Print Network [OSTI]

    Bertini, Robert L.

    of an arterial. First, we extract data from the bus dispatch system (BDS) of the Tri- County Metropolitan Transit District (TriMet), the transit provider for Portland, Oregon. Then, the performance characteristics engineers, planners, researchers, and transportation agencies have expended much effort trying to understand

  19. Thermodynamics and phase transitions of electrolytes on lattices with different discretization parameters

    E-Print Network [OSTI]

    Thermodynamics and phase transitions of electrolytes on lattices with different discretization February 2005; in final form 14 April 2005) Lattice models are crucial for studying thermodynamic thermodynamics and the nature of phase transitions in systems with charged particles. A discretization parameter

  20. Superdiffusive, heterogeneous, and collective particle motion near the fluid-solid transition in

    E-Print Network [OSTI]

    Berthier, Ludovic

    heterogeneity near glass transitions, we discover a number of original signatures of the jamming transition show that dynamic heterogeneities in dense athermal systems and glass formers are very different to foams and granular materials are dense assemblies of non-Brownian particles [1]. Since thermal energy