National Library of Energy BETA

Sample records for 019-60 ab dc

  1. Data:7a23ab07-5468-48dc-947a-679327ca61e0 | Open Energy Information

    Open Energy Info (EERE)

    dc-947a-679327ca61e0 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic...

  2. Census Snapshot: Washington, DC

    E-Print Network [OSTI]

    Romero, Adam P.; Baumle, Amanda K; Badgett, M.V. Lee; Gates, Gary J

    2007-01-01

    INSTITUTE CENSUS SNAPSHOT | WASHINGTON, DC. | DECEMBER 2007WASHINGTON, D.C. Adam P. Romero, Public Policy Fellow AmandaINSTITUTE CENSUS SNAPSHOT | WASHINGTON, DC. | DECEMBER 2007

  3. Radio frequency dc-dc power conversion

    E-Print Network [OSTI]

    Rivas, Juan, 1976-

    2007-01-01

    THIS THESIS addresses the development of system architectures and circuit topologies for dc-dc power conversion at very high frequencies. The systems architectures that are developed are structured to overcome limitations ...

  4. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2013-01-01

    however, DC was less amenable to transmission over longtransmission 32 km to Buffalo, even though the loads at that time were entirely DC.

  5. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01

    ABORATORY Building Scale DC Microgrids Chris Marnay, Stevenemployer. Building Scale DC Microgrids Chris Marnay, IEEEgenerally known as microgrids (or µgrids). The dominance of

  6. DC source assemblies

    DOE Patents [OSTI]

    Campbell, Jeremy B; Newson, Steve

    2013-02-26

    Embodiments of DC source assemblies of power inverter systems of the type suitable for deployment in a vehicle having an electrically grounded chassis are provided. An embodiment of a DC source assembly comprises a housing, a DC source disposed within the housing, a first terminal, and a second terminal. The DC source also comprises a first capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the first terminal. The DC source assembly further comprises a second capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the second terminal.

  7. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01

    involves DC directly, e.g. fuel cells, fuels, but electricthe likely emergence of fuel cells and required batteriesphotovoltaic cells, fuel cells, power quality, converters,

  8. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2013-01-01

    the likely emergence of fuel cells and required batteriesphotovoltaic cells, fuel cells, power quality, converters,DC) generation, e.g. fuel cells (FCs), from combustion

  9. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2013-01-01

    resources, a 10 kW vertical axis wind turbine, and Fig. 4AC-grid Fig. 3. Vertical axis wind turbine in the AIT DC µ

  10. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01

    resources, a 10 kW vertical axis wind turbine, and Fig. 4the µgrid Fig. 3. Vertical axis wind turbine in the AIT DC µ

  11. Multilevel DC link inverter

    DOE Patents [OSTI]

    Su, Gui-Jia

    2003-06-10

    A multilevel DC link inverter and method for improving torque response and current regulation in permanent magnet motors and switched reluctance motors having a low inductance includes a plurality of voltage controlled cells connected in series for applying a resulting dc voltage comprised of one or more incremental dc voltages. The cells are provided with switches for increasing the resulting applied dc voltage as speed and back EMF increase, while limiting the voltage that is applied to the commutation switches to perform PWM or dc voltage stepping functions, so as to limit current ripple in the stator windings below an acceptable level, typically 5%. Several embodiments are disclosed including inverters using IGBT's, inverters using thyristors. All of the inverters are operable in both motoring and regenerating modes.

  12. AB Space Engine

    E-Print Network [OSTI]

    Alexander Bolonkin

    2008-03-02

    On 4 January 2007 the author published the article Wireless Transfer of Electricity in Outer Space in http://arxiv.org wherein he offered and researched a new revolutionary method of transferring electric energy in space. In that same article, he offered a new engine which produces a large thrust without throwing away large amounts of reaction mass (unlike the conventional rocket engine). In the current article, the author develops the theory of this kind of impulse engine and computes a sample project which shows the big possibilities opened by this new AB-Space Engine. The AB-Space Engine gets the energy from ground-mounted power; a planet electric station can transfer electricity up to 1000 millions (and more) of kilometers by plasma wires. Author shows that AB-Space Engine can produce thrust of 10 tons (and more). That can accelerate a space ship to some thousands of kilometers/second. AB-Space Engine has a staggering specific impulse owing to the very small mass expended. The AB-Space Engine reacts not by expulsion of its own mass (unlike rocket engine) but against the mass of its planet of origin (located perhaps a thousand of millions of kilometers away) through the magnetic field of its plasma cable. For creating this plasma cable the AB-Space Engine spends only some kg of hydrogen.

  13. AB Space Engine

    E-Print Network [OSTI]

    Bolonkin, Alexander

    2008-01-01

    On 4 January 2007 the author published the article Wireless Transfer of Electricity in Outer Space in http://arxiv.org wherein he offered and researched a new revolutionary method of transferring electric energy in space. In that same article, he offered a new engine which produces a large thrust without throwing away large amounts of reaction mass (unlike the conventional rocket engine). In the current article, the author develops the theory of this kind of impulse engine and computes a sample project which shows the big possibilities opened by this new AB-Space Engine. The AB-Space Engine gets the energy from ground-mounted power; a planet electric station can transfer electricity up to 1000 millions (and more) of kilometers by plasma wires. Author shows that AB-Space Engine can produce thrust of 10 tons (and more). That can accelerate a space ship to some thousands of kilometers/second. AB-Space Engine has a staggering specific impulse owing to the very small mass expended. The AB-Space Engine reacts not b...

  14. DC attenuation meter

    DOE Patents [OSTI]

    Hargrove, Douglas L.

    2004-09-14

    A portable, hand-held meter used to measure direct current (DC) attenuation in low impedance electrical signal cables and signal attenuators. A DC voltage is applied to the signal input of the cable and feedback to the control circuit through the signal cable and attenuators. The control circuit adjusts the applied voltage to the cable until the feedback voltage equals the reference voltage. The "units" of applied voltage required at the cable input is the system attenuation value of the cable and attenuators, which makes this meter unique. The meter may be used to calibrate data signal cables, attenuators, and cable-attenuator assemblies.

  15. DC arc weld starter

    DOE Patents [OSTI]

    Campiotti, Richard H. (Tracy, CA); Hopwood, James E. (Oakley, CA)

    1990-01-01

    A system for starting an arc for welding uses three DC power supplies, a high voltage supply for initiating the arc, an intermediate voltage supply for sustaining the arc, and a low voltage welding supply directly connected across the gap after the high voltage supply is disconnected.

  16. Auxiliary resonant DC tank converter

    DOE Patents [OSTI]

    Peng, Fang Z. (Knoxville, TN)

    2000-01-01

    An auxiliary resonant dc tank (ARDCT) converter is provided for achieving soft-switching in a power converter. An ARDCT circuit is coupled directly across a dc bus to the inverter to generate a resonant dc bus voltage, including upper and lower resonant capacitors connected in series as a resonant leg, first and second dc tank capacitors connected in series as a tank leg, and an auxiliary resonant circuit comprising a series combination of a resonant inductor and a pair of auxiliary switching devices. The ARDCT circuit further includes first clamping means for holding the resonant dc bus voltage to the dc tank voltage of the tank leg, and second clamping means for clamping the resonant dc bus voltage to zero during a resonant period. The ARDCT circuit resonantly brings the dc bus voltage to zero in order to provide a zero-voltage switching opportunity for the inverter, then quickly rebounds the dc bus voltage back to the dc tank voltage after the inverter changes state. The auxiliary switching devices are turned on and off under zero-current conditions. The ARDCT circuit only absorbs ripples of the inverter dc bus current, thus having less current stress. In addition, since the ARDCT circuit is coupled in parallel with the dc power supply and the inverter for merely assisting soft-switching of the inverter without participating in real dc power transmission and power conversion, malfunction and failure of the tank circuit will not affect the functional operation of the inverter; thus a highly reliable converter system is expected.

  17. Improved DC Gun Insulator

    SciTech Connect (OSTI)

    M.L. Neubauer, K.B. Beard, R. Sah, C. Hernandez-Garcia, G. Neil

    2009-05-01

    Many user facilities such as synchrotron light sources and free electron lasers require accelerating structures that support electric fields of 10-100 MV/m, especially at the start of the accelerator chain where ceramic insulators are used for very high gradient DC guns. These insulators are difficult to manufacture, require long commissioning times, and have poor reliability, in part because energetic electrons bury themselves in the ceramic, creating a buildup of charge and causing eventual puncture. A novel ceramic manufacturing process is proposed. It will incorporate bulk resistivity in the region where it is needed to bleed off accumulated charge caused by highly energetic electrons. This process will be optimized to provide an appropriate gradient in bulk resistivity from the vacuum side to the air side of the HV standoff ceramic cylinder. A computer model will be used to determine the optimum cylinder dimensions and required resistivity gradient for an example RF gun application. A ceramic material example with resistivity gradient appropriate for use as a DC gun insulator will be fabricated by glazing using doping compounds and tested.

  18. Design Considerations for Very High Frequency dc-dc Converters

    E-Print Network [OSTI]

    Perreault, Dave

    the gating power while ensuring fast on- off transitions of the semiconductor switch. The rectifier of switching power converters operating at greatly increased switching frequencies. Greatly increasedDesign Considerations for Very High Frequency dc-dc Converters Juan M. Rivas, David Jackson, Olivia

  19. Aalborg Universitet Power flow analysis for DC voltage droop controlled DC microgrids

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Power flow analysis for DC voltage droop controlled DC microgrids Li, Chendan). Power flow analysis for DC voltage droop controlled DC microgrids. In Proceedings of the 11th.aau.dk on: juli 07, 2015 #12;Power flow analysis for DC voltage droop controlled DC microgrids Chendan Li

  20. Triple voltage dc-to-dc converter and method

    DOE Patents [OSTI]

    Su, Gui-Jia (Knoxville, TN)

    2008-08-05

    A circuit and method of providing three dc voltage buses and transforming power between a low voltage dc converter and a high voltage dc converter, by coupling a primary dc power circuit and a secondary dc power circuit through an isolation transformer; providing the gating signals to power semiconductor switches in the primary and secondary circuits to control power flow between the primary and secondary circuits and by controlling a phase shift between the primary voltage and the secondary voltage. The primary dc power circuit and the secondary dc power circuit each further comprising at least two tank capacitances arranged in series as a tank leg, at least two resonant switching devices arranged in series with each other and arranged in parallel with the tank leg, and at least one voltage source arranged in parallel with the tank leg and the resonant switching devices, said resonant switching devices including power semiconductor switches that are operated by gating signals. Additional embodiments having a center-tapped battery on the low voltage side and a plurality of modules on both the low voltage side and the high voltage side are also disclosed for the purpose of reducing ripple current and for reducing the size of the components.

  1. Multi-Level DC/DC Power Conversion System with Multiple DC Sources

    E-Print Network [OSTI]

    Tolbert, Leon M.

    boost converter. Experimental results are provided to confirm the analysis and control concept. I, instead of connecting all batteries in series as one power source and a bi-directional boost converter. INTRODUCTION Traditional dc/dc converters require at least one inductive component, which is bulky, heavy

  2. DC-DC converter current source fed naturally commutated brushless DC motor drive 

    E-Print Network [OSTI]

    Khopkar, Rahul Vijaykumar

    2004-11-15

    the hard switchings by natural turn-off, thereby eliminating the heatsinks as well as the large dc link capacitor. A controlled rectifier together with a large inductor act as the current source. The only disadvantage is the large value of the dc link...

  3. Bi-Directional DC-DC Converter for PHEV Applications

    SciTech Connect (OSTI)

    Abas Goodarzi

    2011-01-31

    Plug-In Hybrid Electric Vehicles (PHEV) require high power density energy storage system (ESS) for hybrid operation and high energy density ESS for Electric Vehicle (EV) mode range. However, ESS technologies to maximize power density and energy density simultaneously are not commercially feasible. The use of bi-directional DC-DC converter allows use of multiple energy storage, and the flexible DC-link voltages can enhance the system efficiency and reduce component sizing. This will improve fuel consumption, increase the EV mode range, reduce the total weight, reduce battery initial and life cycle cost, and provide flexibility in system design.

  4. AB Levitator and Electricity Storage

    E-Print Network [OSTI]

    Alexander Bolonkin

    2007-03-01

    The author researched this new idea - support of flight by any aerial vehicles at significant altitude solely by the magnetic field of the planet. It is shown that current technology allows humans to create a light propulsion (AB engine) which does not depend on air, water or ground terrain. Simultaniosly, this revolutionary thruster is a device for the storage of electricity which is extracted and is replenished (during braking) from/into the storage with 100 percent efficiency. The relative weight ratio of this engine is 0.01 - 0.1 (from thrust). For some types of AB engine (toroidal form) the thrust easily may be changed in any direction without turning of engine. The author computed many projects using different versions of offered AB engine: small device for levitation-flight of a human (including flight from Earth to Outer Space), fly VTOL car (track), big VTOL aircrat, suspended low altitude stationary satellite, powerful Space Shuttle-like booster for travel to the Moon and Mars without spending energy (spended energy is replenished in braking when ship returns from other planet to its point of origin), using AB-devices in military, in sea-going ships (submarimes), in energy industry (for example. as small storage of electric energy) and so on. The vehicles equipped with AB propulsion can take flight for days and cover distances of tens thousands of kilometers at hypersonic or extra-atmosphere space speeds. The work contains tens of inventions and innovations which solves problems and breaks limitations which appear in solution of these very complex revolutionary ideas. Key word: AB levitator, levitation, non-rocket outer space flight, electric energy storage, AB propulsion, AB engine, Bolonkin.

  5. DC Pro Software Tool Suite

    SciTech Connect (OSTI)

    2009-04-01

    This fact sheet describes how DOE's Data Center Energy Profiler (DC Pro) Software Tool Suite and other resources can help U.S. companies identify ways to improve the efficiency of their data centers.

  6. Catalog of DC Appliances and Power Systems

    SciTech Connect (OSTI)

    Garbesi, Karina; Vossos, Vagelis; Shen, Hongxia

    2010-10-13

    This document catalogs the characteristics of current and potential future DC products and power systems.

  7. Interaction of DC-DC converters and submarine power cables in offshore wind farm DC networks 

    E-Print Network [OSTI]

    Wood, Thomas Benedict

    2014-06-30

    Offshore wind power is attracting increasing levels of research and investment. The use of HVDC transmission and the development of DC grids are topics with similar high levels of interest that go hand in hand with the ...

  8. Generating Isolated Outputs in a Multilevel Modular Capacitor Clamped DC-DC Converter

    E-Print Network [OSTI]

    Tolbert, Leon M.

    -dc converters based on inductive energy transfer method (IETM) such as buck, boost, and buck-boost converter967 Generating Isolated Outputs in a Multilevel Modular Capacitor Clamped DC-DC Converter (MMCCC clamped dc-dc converter. The multilevel modular capacitor clamped converter (MMCCC) has several key

  9. Thermonuclear Reflect AB-Reactor

    E-Print Network [OSTI]

    Alexander Bolonkin

    2008-03-26

    The author offers a new kind of thermonuclear reflect reactor. The remarkable feature of this new reactor is a three net AB reflector, which confines the high temperature plasma. The plasma loses part of its energy when it contacts with the net but this loss can be compensated by an additional permanent plasma heating. When the plasma is rarefied (has a small density), the heat flow to the AB reflector is not large and the temperature in the triple reflector net is lower than 2000 - 3000 K. This offered AB-reactor has significantly less power then the currently contemplated power reactors with magnetic or inertial confinement (hundreds-thousands of kW, not millions of kW). But it is enough for many vehicles and ships and particularly valuable for tunnelers, subs and space apparatus, where air to burn chemical fuel is at a premium or simply not available. The author has made a number of innovations in this reactor, researched its theory, developed methods of computation, made a sample computation of typical project. The main point of preference for the offered reactor is its likely cheapness as a power source. Key words: Micro-thermonuclear reactor, Multi-reflex AB-thermonuclear reactor, Self-magnetic AB-thermonuclear reactor, aerospace thermonuclear engine.

  10. Light-weight DC to very high voltage DC converter

    DOE Patents [OSTI]

    Druce, R.L.; Kirbie, H.C.; Newton, M.A.

    1998-06-30

    A DC-DC converter capable of generating outputs of 100 KV without a transformer comprises a silicon opening switch (SOS) diode connected to allow a charging current from a capacitor to flow into an inductor. When a specified amount of charge has flowed through the SOS diode, it opens up abruptly; and the consequential collapsing field of the inductor causes a voltage and current reversal that is steered into a load capacitor by an output diode. A switch across the series combination of the capacitor, inductor, and SOS diode closes to periodically reset the SOS diode by inducing a forward-biased current. 1 fig.

  11. Switching coordination of distributed dc-dc converters for highly efficient photovoltaic power plants

    DOE Patents [OSTI]

    Agamy, Mohammed; Elasser, Ahmed; Sabate, Juan Antonio; Galbraith, Anthony William; Harfman Todorovic, Maja

    2014-09-09

    A distributed photovoltaic (PV) power plant includes a plurality of distributed dc-dc converters. The dc-dc converters are configured to switch in coordination with one another such that at least one dc-dc converter transfers power to a common dc-bus based upon the total system power available from one or more corresponding strings of PV modules. Due to the coordinated switching of the dc-dc converters, each dc-dc converter transferring power to the common dc-bus continues to operate within its optimal efficiency range as well as to optimize the maximum power point tracking in order to increase the energy yield of the PV power plant.

  12. DC to DC power converters and methods of controlling the same

    SciTech Connect (OSTI)

    Steigerwald, Robert Louis; Elasser, Ahmed; Sabate, Juan Antonio; Todorovic, Maja Harfman; Agamy, Mohammed

    2012-12-11

    A power generation system configured to provide direct current (DC) power to a DC link is described. The system includes a first power generation unit configured to output DC power. The system also includes a first DC to DC converter comprising an input section and an output section. The output section of the first DC to DC converter is coupled in series with the first power generation unit. The first DC to DC converter is configured to process a first portion of the DC power output by the first power generation unit and to provide an unprocessed second portion of the DC power output of the first power generation unit to the output section.

  13. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    5V DC USB power from wall sockets. .. 52 viprovides 5V DC USB power from wall sockets. Reproduced withPower over Ethernet 51 Universal Serial Bus Wall

  14. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    main conclusions about off-grid markets for DC appliances,and power systems. Mature Off-Grid Markets for DC Appliancesapplications include off-grid residential, telecom, remote

  15. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    AEE Solar. 2010 Renewable Energy Design Guide and Catalog.2009, 2010, Interstate Renewable Energy Council. RetrievedDC) generated by on-site renewable energy systems in its DC

  16. Ecological benefits of dc power transmission

    SciTech Connect (OSTI)

    Kutuzova, N. B.

    2011-05-15

    The environmental effects of dc overhead transmission lines are examined. The major effects of ac and dc transmission lines are compared. Dc lines have advantages compared to ac lines in terms of electrical safety for people under the lines, biological effects, corona losses, and clearance width.

  17. Analysis and Optimization of Switched-Capacitor DC-DC Converters

    E-Print Network [OSTI]

    Sanders, Seth

    on conduction loss) of a ladder-type converter is found to be superior to that of a conventional boost converterAnalysis and Optimization of Switched-Capacitor DC-DC Converters Michael D. Seeman, Seth R. Sanders­ Analysis methods are developed that fully determine a switched-capacitor (SC) dc-dc converter's steady

  18. QER Public Meeting in Washington, DC: Enhancing Energy Infrastructure...

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

    Washington, DC: Enhancing Energy Infrastructure Resiliency and Addressing Vulnerabilities QER Public Meeting in Washington, DC: Enhancing Energy Infrastructure Resiliency and...

  19. Seabased AB | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EIS Report UrlNM-bRenewableSMUD WindISaveScripps FlumeSeaWestSeabased AB

  20. Solibro AB | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EIS ReportEurope GmbH JumpSloughInfraSolarSkiesSolarpraxisSolenergisAB

  1. Ab initiomultireference in-medium similarity renormalization...

    Office of Scientific and Technical Information (OSTI)

    Details In-Document Search This content will become publicly available on October 23, 2015 Title: Ab initiomultireference in-medium similarity renormalization group calculations...

  2. Ab-Initio Molecular Dynamics

    E-Print Network [OSTI]

    Thomas D. Kühne

    2013-03-26

    Computer simulation methods, such as Monte Carlo or Molecular Dynamics, are very powerful computational techniques that provide detailed and essentially exact information on classical many-body problems. With the advent of ab-initio molecular dynamics, where the forces are computed on-the-fly by accurate electronic structure calculations, the scope of either method has been greatly extended. This new approach, which unifies Newton's and Schr\\"odinger's equations, allows for complex simulations without relying on any adjustable parameter. This review is intended to outline the basic principles as well as a survey of the field. Beginning with the derivation of Born-Oppenheimer molecular dynamics, the Car-Parrinello method and the recently devised efficient and accurate Car-Parrinello-like approach to Born-Oppenheimer molecular dynamics, which unifies best of both schemes are discussed. The predictive power of this novel second-generation Car-Parrinello approach is demonstrated by a series of applications ranging from liquid metals, to semiconductors and water. This development allows for ab-initio molecular dynamics simulations on much larger length and time scales than previously thought feasible.

  3. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    mainly fluorescent and LED lighting and DC ceiling fans. TheFluorescent, CFL Lighting systems: LED Fluorescent and CFLlamps CFL lamps LED lamp CFL floodlight Lighting systems:

  4. Simultaneous distribution of AC and DC power

    DOE Patents [OSTI]

    Polese, Luigi Gentile

    2015-09-15

    A system and method for the transport and distribution of both AC (alternating current) power and DC (direct current) power over wiring infrastructure normally used for distributing AC power only, for example, residential and/or commercial buildings' electrical wires is disclosed and taught. The system and method permits the combining of AC and DC power sources and the simultaneous distribution of the resulting power over the same wiring. At the utilization site a complementary device permits the separation of the DC power from the AC power and their reconstruction, for use in conventional AC-only and DC-only devices.

  5. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    sited renewable energy market for the foreseeable future. Inup renewable energy systems increases in the future, chargerenewable energy sources [5]. If direct-DC has a future in

  6. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    similarly to an uninterruptible power supply. Lifetime:utility coupled with uninterruptible power requirements forloads serviced by DC uninterruptible power supplies in data

  7. SSL Demonstration: Parking Garage Lighting, Washington, DC

    SciTech Connect (OSTI)

    2013-06-01

    GATEWAY program report brief summarizing an SSL parking garage demonstration at the Dept. of Labor headquarters parking garage in Washington, DC.

  8. Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications

    E-Print Network [OSTI]

    Liberzon, Daniel

    Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications Sairaj V in photovoltaic energy processing applications is presented. The proposed approach acknowledges the influence through several case studies. Index Terms-- Markov reliability modeling, photovoltaic systems, power

  9. Design of a very high frequency resonant boost DC-DC converter

    E-Print Network [OSTI]

    Burkhart, Justin (Justin Michael)

    2010-01-01

    THIS thesis explores the development of a very high frequency DC-DC resonant boost converter. The topology examined features low parts count and fast transient response but suffers from higher device stresses compared to ...

  10. Design and evaluation of a very high frequency dc/dc converter

    E-Print Network [OSTI]

    Pilawa-Podgurski, Robert C. N

    2007-01-01

    This thesis presents a resonant boost topology suitable for very high frequency (VHF, 30-300 MHz) dc-dc power conversion. The proposed design is a fixed frequency, fixed duty ratio resonant converter featuring low device ...

  11. Design and characterization of a radio-frequency dc/dc power converter

    E-Print Network [OSTI]

    Jackson, David A. (David Alexander)

    2005-01-01

    The use of radio-frequency (RF) amplifier topologies in dc/dc power converters allows the operating frequency to be increased by more than two orders of magnitude over the frequency of conventional converters. This enables ...

  12. Radio frequency dc-dc converters : device characterization, topology evaluation, and design

    E-Print Network [OSTI]

    Leitermann, Olivia

    2008-01-01

    High frequency power conversion is attractive for the opportunities it affords for improved performance. Dc-dc converters operating at high frequencies use smaller-valued energy storage elements, which tend to be physically ...

  13. Design and analysis of multiphase DC-DC converters with coupled inductors 

    E-Print Network [OSTI]

    Shi, Meng

    2007-09-17

    , directly coupled inductors have the benefit of low sensitivity to input variation at high frequencies. In addition, the proposed new structure for multiphase DC-DC converters has excellent current sharing performance and reduced current ripple. Computer...

  14. Computer-aided optimization of DC/DC converters for automotive applications

    E-Print Network [OSTI]

    Neugebauer, Timothy C.

    This paper investigates computer-aided optimization of DC/DC converters, with a focus on converters for dual-voltage automotive electrical systems. A new CAD optimization approach based on Monte Carlo search methods is ...

  15. The capacitively coupled converter (C³) for high power DC-DC conversion 

    E-Print Network [OSTI]

    Khan, Shahriar

    1992-01-01

    THE CAPACITIVELY COUPLED CONVERTER (C3) FOR HIGH POWER DC-DC CONVERSION A Thesis by SHAHRIAR KHAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1992 Major Subject: Electrical Engineering THE CAPACITIVELY COUPLED CONVERTER (Cs) FOR HIGH POWER DC-DC CONVERSION A Thesis by SHAHRIAR KHAN Approved as to style and content by: Mehrdad Ehsani (Chair of Committee) Prasad Enjeti...

  16. High Speed CMOS Output Stage for Integrated DC-DC Converters Wai Tung Ng*, Marian Changl

    E-Print Network [OSTI]

    Ng, Wai Tung

    to attain maximum channel width per unit area for low on-resistance. A typical MF layout and its equivalent DC/DC converters is characterized by power conversion efficiency, transient response, size and cost is introduced to enhance the switching speed and power conversion efficiency of low voltage integrated DC

  17. Design and development of a DC-DC converter for a fuel cell inverter system 

    E-Print Network [OSTI]

    Gopinath, Rajesh

    2001-01-01

    (FEC)' organized by the Department of Energy and IEEE in August 2001. An efficient 3-terminal DC-DC push-pull topology was adopted to meet the performance and stringent cost constraints. A broad overview of the DC-AC inverter and its control is also...

  18. High Voltage DC Transmission 2 1.0 Introduction

    E-Print Network [OSTI]

    McCalley, James D.

    1 High Voltage DC Transmission 2 1.0 Introduction Interconnecting HVDC within an AC system requires conversion from AC to DC and inversion from DC to AC. We refer to the circuits which provide conversion from AC to DC as rectifiers and the circuits which provide conversion from DC to AC as inverters. The term

  19. Ab-Initio Molecular Dynamics

    E-Print Network [OSTI]

    Kühne, Thomas D

    2012-01-01

    Computer simulations and molecular dynamics in particular, is a very powerful method to provide detailed and essentially exact informations of classical many-body problems. With the advent of \\textit{ab-initio} molecular dynamics, where the forces are computed on-the-fly by accurate electronic structure calculations, the scope of either method has been greatly extended. This new approach, which unifies Newton's and Schr\\"odinger's equations, allows for complex simulations without relying on any adjustable parameter. This review is intended to outline the basic principles as well as a survey of the field. Beginning with the derivation of Born-Oppenheimer molecular dynamics, the Car-Parrinello method as well as novel hybrid scheme that unifies best of either approach are discussed. The predictive power is demonstrated by a series of applications ranging from insulators to semiconductors and even metals in condensed phases.

  20. High voltage DC power supply

    DOE Patents [OSTI]

    Droege, Thomas F. (Batavia, IL)

    1989-01-01

    A high voltage DC power supply having a first series resistor at the output for limiting current in the event of a short-circuited output, a second series resistor for sensing the magnitude of output current, and a voltage divider circuit for providing a source of feedback voltage for use in voltage regulation is disclosed. The voltage divider circuit is coupled to the second series resistor so as to compensate the feedback voltage for a voltage drop across the first series resistor. The power supply also includes a pulse-width modulated control circuit, having dual clock signals, which is responsive to both the feedback voltage and a command voltage, and also includes voltage and current measuring circuits responsive to the feedback voltage and the voltage developed across the second series resistor respectively.

  1. High voltage DC power supply

    DOE Patents [OSTI]

    Droege, T.F.

    1989-12-19

    A high voltage DC power supply having a first series resistor at the output for limiting current in the event of a short-circuited output, a second series resistor for sensing the magnitude of output current, and a voltage divider circuit for providing a source of feedback voltage for use in voltage regulation is disclosed. The voltage divider circuit is coupled to the second series resistor so as to compensate the feedback voltage for a voltage drop across the first series resistor. The power supply also includes a pulse-width modulated control circuit, having dual clock signals, which is responsive to both the feedback voltage and a command voltage, and also includes voltage and current measuring circuits responsive to the feedback voltage and the voltage developed across the second series resistor respectively. 7 figs.

  2. DC-based magnetic field controller

    DOE Patents [OSTI]

    Kotter, Dale K. (Shelley, ID); Rankin, Richard A. (Ammon, ID); Morgan, John P,. (Idaho Falls, ID)

    1994-01-01

    A magnetic field controller for laboratory devices and in particular to dc operated magnetic field controllers for mass spectrometers, comprising a dc power supply in combination with improvements to a hall probe subsystem, display subsystem, preamplifier, field control subsystem, and an output stage.

  3. Alcohol Outlets and Violent Crime in Washington D.C.

    E-Print Network [OSTI]

    Franklin, F. Abron; LaVeist, Thomas A.; Webster, Daniel W.; Pan, William K.

    2010-01-01

    of Violence and Disorder. Washington, D.C. : The Urbanand Violent Crime in Washington D.C. F. Abron Franklin II,Involvement in Crime. Washington, D.C. : U.S. Department of

  4. EA-351 DC Energy Dakota, LLC | Department of Energy

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

    Dakota, LLC Order authorizing DC Energy Dakota, LLC to export electric energy to Canada EA-351 DC Energy Dakota, LLC More Documents & Publications Application to Export...

  5. INL Efficiency and Security Testing of EVSE, DC Fast Chargers...

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

    and Security Testing of EVSE, DC Fast Chargers, and Wireless Charging Systems INL Efficiency and Security Testing of EVSE, DC Fast Chargers, and Wireless Charging Systems...

  6. Report Now Available: DC Microgrids Scoping Study--Estimate of...

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

    Report Now Available: DC Microgrids Scoping Study--Estimate of Technical and Economic Benefits (March 2015) Report Now Available: DC Microgrids Scoping Study--Estimate of Technical...

  7. Energy Department Completes Cool Roof Installation on DC Headquarters...

    Energy Savers [EERE]

    Energy Department Completes Cool Roof Installation on DC Headquarters Building to Save Money by Saving Energy Energy Department Completes Cool Roof Installation on DC Headquarters...

  8. AVTA: Battery Testing - DC Fast Charging's Effects on PEV Batteries...

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

    Battery Testing - DC Fast Charging's Effects on PEV Batteries AVTA: Battery Testing - DC Fast Charging's Effects on PEV Batteries The Vehicle Technologies Office's Advanced Vehicle...

  9. AVTA: Hasdec DC Fast Charging Testing Results | Department of...

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

    Hasdec DC Fast Charging Testing Results AVTA: Hasdec DC Fast Charging Testing Results The Vehicle Technologies Office's Advanced Vehicle Testing Activity carries out testing on a...

  10. Low Cost, High Temperature, High Ripple Current DC Bus Capacitors...

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

    Low Cost, High Temperature, High Ripple Current DC Bus Capacitors Low Cost, High Temperature, High Ripple Current DC Bus Capacitors 2010 DOE Vehicle Technologies and Hydrogen...

  11. Collective rotation from ab initio theory

    E-Print Network [OSTI]

    M. A. Caprio; P. Maris; J. P. Vary; R. Smith

    2015-09-01

    Through ab initio approaches in nuclear theory, we may now seek to quantitatively understand the wealth of nuclear collective phenomena starting from the underlying internucleon interactions. No-core configuration interaction (NCCI) calculations for p-shell nuclei give rise to rotational bands, as evidenced by rotational patterns for excitation energies, electromagnetic moments, and electromagnetic transitions. In this review, NCCI calculations of 7-9Be are used to illustrate and explore ab initio rotational structure, and the resulting predictions for rotational band properties are compared with experiment. We highlight the robustness of ab initio rotational predictions across different choices for the internucleon interaction.

  12. Multiscale ab initio approaches to materials physics

    E-Print Network [OSTI]

    Engeness, Torkel Dyrbaek, 1972-

    2003-01-01

    This work presents new ab initio approaches to materials physics. We first introduce the multiscale approach to determination of thermal properties and changes in free energy. With this approach one can perform thermal ...

  13. NOISE AND OPTIMIZATION OF THE dc SQUID

    E-Print Network [OSTI]

    Tesche, Claudia Denke

    2011-01-01

    unpublished). A. Van der Ziel, Noise (Prentice-Hall, Inc. ,MAY 29 19ft LBL-8510 MASTER NOISE AND OPTIMIZATION OF THE deW-7405-ENG-48 LBL-8510 NOISE AND OPTIMIZATION OF THE dc

  14. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    DC/AC-Hybrid) LED AC LED Power (W) Figure 8. Efficacywith the same power consumption. For LEDs, the improvementLED light-emitting diode viii lumen a measure of the power

  15. DC High School Science Bowl Regionals

    Broader source: Energy.gov [DOE]

    This event is the Washington, D.C. High School Regional competition for the US National Science Bowl. The regional competition is run by the Office of Economic Impact and Diversity, and the...

  16. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    direct-DC. The timing of EV charging relative to PV outputadded a hypothetical EV charging load. The EV load could bewith building loads. EV charging standards [26, 27

  17. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    Ovens Electric Heat Pumps Geothermal Heat Pumps Solar WaterOvens Appliance DC-internal product power (Watts) Personal Computers and Related Equipment Rechargeable Electronics Refrigerators Room Air Conditioners Security Systems Solar

  18. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    produce a DC-compatible dishwasher that uses 51% less energyCooking Equipments Dishwashers Lighting Electric Other Waterby end-Use ( TWh) Dishwashers DVDs/VCRs DVDs/VCRs Freezers

  19. American Institute of Aeronautics and Astronautics Active System Identification of a DC-DC Converter Using

    E-Print Network [OSTI]

    American Institute of Aeronautics and Astronautics 1 Active System Identification of a DC and Computer Engineering, UCB 425. #12;American Institute of Aeronautics and Astronautics 2 analysis10

  20. PAST RECIPIENTS OF THE HAA AWARD 1990 Harriet B. Belin, AB '43

    E-Print Network [OSTI]

    Wood, Robert

    . AB '35, MBA '39 Theodore B. Lee AB '54 Elliott H. Phillips AB '40, JD '43 William G. Young AB '62 Holly B. Nottebohm AB '62 Daniel A. Phillips AB '60, MBA '63 Elliott K. Shapira AB '35, PhD '41 1996 Catherine A. Connett MBA '79 Joy K. Fallon AB '78, JD '82 Joan Porter MacIver AB '75 Thomas H. Parry AB '74

  1. Improved DC Gun Insulator Assembly

    SciTech Connect (OSTI)

    Sah, R.; Dudas, A.; Neubauer, M. L.; Poelker, M.; Surles-Law, K. E.L.

    2010-05-23

    Many user fa­cil­i­ties such as syn­chrotron ra­di­a­tion light sources and free elec­tron lasers re­quire ac­cel­er­at­ing struc­tures that sup­port elec­tric fields of 10-100 MV/m, es­pe­cial­ly at the start of the ac­cel­er­a­tor chain where ce­ram­ic in­su­la­tors are used for very high gra­di­ent DC guns. These in­su­la­tors are dif­fi­cult to man­u­fac­ture, re­quire long com­mis­sion­ing times, and often ex­hib­it poor re­li­a­bil­i­ty. Two tech­ni­cal ap­proach­es to solv­ing this prob­lem will be in­ves­ti­gat­ed. First­ly, in­vert­ed ce­ram­ics offer so­lu­tions for re­duced gra­di­ents be­tween the elec­trodes and ground. An in­vert­ed de­sign will be pre­sent­ed for 350 kV, with max­i­mum gra­di­ents in the range of 5-10 MV/m. Sec­ond­ly, novel ce­ram­ic man­u­fac­tur­ing pro­cess­es will be stud­ied, in order to pro­tect triple junc­tion lo­ca­tions from emis­sion, by ap­ply­ing a coat­ing with a bulk re­sis­tiv­i­ty. The pro­cess­es for cre­at­ing this coat­ing will be op­ti­mized to pro­vide pro­tec­tion as well as be used to coat a ce­ram­ic with an ap­pro­pri­ate gra­di­ent in bulk re­sis­tiv­i­ty from the vac­u­um side to the air side of an HV stand­off ce­ram­ic cylin­der. Ex­am­ple in­su­la­tor de­signs are being com­put­er mod­elled, and in­su­la­tor sam­ples are being man­u­fac­tured and test­ed

  2. A DC-DC Converter-Based PEM Fuel Cell System Emulator

    E-Print Network [OSTI]

    Boyer, Edmond

    A DC-DC Converter-Based PEM Fuel Cell System Emulator Daoud Rezzak, Farid Khoucha, Mohamed Benbouzid, Abdelaziz Kheloui and Abdeslam Mamoune Abstract--The Proton Exchange Membrane Fuel Cell (PEMFC power supplies. Fuel cell systems are characterized by high costs and complex auxiliary devices

  3. DC's Marble ceiling : urban height and its regulation in Washington, DC

    E-Print Network [OSTI]

    Trueblood, Andrew Tyson

    2009-01-01

    Washington, DC has a unique urban form that is the result of a century-old law. Through the narrow lens of DC's height limit, I survey a range of topics related to urban height, starting with a review of its history of ...

  4. Method to Improve Total Dose Radiation Hardness in a CMOS dc-dc Boost

    E-Print Network [OSTI]

    Wilamowski, Bogdan Maciej

    Method to Improve Total Dose Radiation Hardness in a CMOS dc-dc Boost Converter Huadian Pan in a wide range of radiation environment, with increasing total dose radiation, The efticieney also greatly for low-power applications (1],[2]. It is known that radiation has many effects on MOSFETs

  5. Development of a 55 kW 3X DC-DC Converter for HEV Systems

    E-Print Network [OSTI]

    Tolbert, Leon M.

    efficiency provide the great potential for the very high temperature operation. The circuit parameter design converter and a traction motor to drive the vehicle. In most commercial HEV systems, the power converter, 37996 Abstract--The design of a 55 kW 3X dc-dc converter is presented for hybrid electric vehicle (HEV

  6. Time domain design of digital compensators for PWM DC-DC converters

    E-Print Network [OSTI]

    transformation and discretization. Digital PID controllers for a Buck and Boost type converters were implemented (via the various transformation algorithms), a digital compensator operates, in reality, in the sampledTime domain design of digital compensators for PWM DC-DC converters Mor Mordechai Peretz and Sam

  7. 5 kW Multilevel DC-DC Converter for Hybrid Electric and Fuel Cell Automotive

    E-Print Network [OSTI]

    Tolbert, Leon M.

    5 kW Multilevel DC-DC Converter for Hybrid Electric and Fuel Cell Automotive Applications Faisal H) for future hybrid electric vehicle and fuel cell automotive applications will be presented in this paper will impact if the 42V/14V dual bus system will be a successful and cost effective solution for future

  8. Aalborg Universitet Optimization with System Damping Restoration for Droop Controlled DC-DC

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    --The parallel operation of dc-dc converters is widely used in distribution systems and uninterruptable power supply systems. Droop control along with virtual resistance (VR) is considered a simple and reliable method for achieving wireless power sharing among converters. In order to enhance the efficiency

  9. DC WRRC Report No. 44 THE D.C. WATER RESOURCES RESEARCH CENTER

    E-Print Network [OSTI]

    District of Columbia, University of the

    . The agreements will reduce the possibility of water shortages during low flows or pollution crisis and insure for new expanded treatment facilities. Finally, the recently completed Rock Creek water shed study has#12;DC WRRC Report No. 44 THE D.C. WATER RESOURCES RESEARCH CENTER THE UNIVERSITY OF THE DISTRICT

  10. Homopolar dc motor and trapped flux brushless dc motor using high temperature superconductor materials

    SciTech Connect (OSTI)

    Crapo, A.D.; Lloyd, J.D. (Emerson Electric Co., St. Louis, MO (US))

    1991-03-01

    This paper reports on two motors designed and built for use with high temperature superconductor (HTSC) materials. They are a homopolar DC motor that will use HTSC field windings and a brushless DC motor that will use bulk HTSC material to trap flux in steel rotor poles. The HTSC field windings of the homopolar DC motor are designed to operate at 1000 Amperes/cm{sup 2} in a 0.010 Tesla (100 Gauss) field. In order to maximize torque in the homopolar DC motor, an iron magnetic circuit with small air gaps gives maximum flux for minimum Ampere turns in the field. A copper field winding version of the homopolar DC motor has been tested while the authors wait for 575 Ampere turn HTSC coils.

  11. An Exploration of the Perceptions and Utilizations of Networking Systems in Washington, D.C.

    E-Print Network [OSTI]

    Lindsey, Robynne

    2013-01-01

    Personal Interview. Washington, D.C. , July 25, 2013.Personal Interview. Washington, D.C. , August 12, 2013.Personal Interview. Washington, D.C. , July 17, 2013. 12

  12. Engineering Science AB: Electrical Rev. Aug 2014 1/3

    E-Print Network [OSTI]

    Wolfe, Patrick J.

    Engineering Science ­ AB: Electrical Rev. Aug 2014 1/3 Plan of Study for the Electrical ­ System Programming & Machine Organization ___________ Sophomore Forum ___________ Electrical Engineering ___________ ___________ ___________ ___________ #12;Engineering Science ­ AB: Electrical Rev. Aug 2014 2/3 Hardware CIRCLE ONE ES 52

  13. FEDERAL COMMUNICATIONS COMMISSION Washington, DC 20554

    E-Print Network [OSTI]

    Bove Jr., V. Michael

    FCC 96­207 Before the FEDERAL COMMUNICATIONS COMMISSION Washington, DC 20554 In the Matter of a mechanism for a bit stream layer transmission standard (into which, e.g., MPEG­2 could fit) 3) The FCC: number of hours per day of digital television transmission, minimal Quality of Service specifications

  14. Halbach array DC motor/generator

    DOE Patents [OSTI]

    Merritt, Bernard T. (Livermore, CA); Dreifuerst, Gary R. (Livermore, CA); Post, Richard F. (Walnut Creek, CA)

    1998-01-01

    A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An "inside-out" design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then "switched" or "commutated" to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives.

  15. Halbach array DC motor/generator

    DOE Patents [OSTI]

    Merritt, B.T.; Dreifuerst, G.R.; Post, R.F.

    1998-01-06

    A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An ``inside-out`` design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then ``switched`` or ``commutated`` to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives. 17 figs.

  16. SUBCONTRACT REPORT: DC-DC Converter for Fuel Cell and Hybrid Vehicles

    SciTech Connect (OSTI)

    Marlino, Laura D; Zhu, Lizhi

    2007-07-01

    The goal of this project is to develop and fabricate a 5kW dc-dc converter with a baseline 14V output capability for fuel cell and hybrid vehicles. The major objectives for this dc-dc converter technology are to meet: Higher efficiency (92%); High coolant temperature,e capability (105 C); High reliability (15 Years/150,000miles); Smaller volume (5L); Lower weight (6kg); and Lower cost ($75/kW). The key technical challenge for these converters is the 105 C coolant temperatures. The power switches and magnetics must be designed to sustain these operating temperatures reliably, without a large cost/mass/volume penalty.

  17. D.C. Water Resources Research Center Annual Technical Report

    E-Print Network [OSTI]

    - DC Water and Sewer Authority (WASA) The Institutes received favorable responses from and met with the following new Advisory Board members: 1- Mr. Richard Gianni, Water Quality Manager, DC Water and Sewer

  18. Decoherence and dephasing errors caused by the dc Stark effect...

    Office of Scientific and Technical Information (OSTI)

    Decoherence and dephasing errors caused by the dc Stark effect in rapid ion transport Citation Details In-Document Search Title: Decoherence and dephasing errors caused by the dc...

  19. DC Microgrids Scoping Study: Estimate of Technical and Economic...

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

    applications where the end-use loads are natively DC, e.g., computers, solid-state lighting, and building networks. These early DC applications may provide higher efficiency,...

  20. Persons Who Received the DC PSC's Emergency Petition and Complaint...

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

    Persons Who Received the DC PSC's Emergency Petition and Complaint via E-mail on August 24, 2005 Persons Who Received the DC PSC's Emergency Petition and Complaint via E-mail on...

  1. AB3 Proton NMR Using Tensor Algebra Frank Rioux

    E-Print Network [OSTI]

    Rioux, Frank

    AB3 Proton NMR Using Tensor Algebra Frank Rioux Professor Emeritus of Chemistry CSB|SJU The purpose of this tutorial is to calculate the NMR spectrum of a four proton AB3 system in Hz) are for the AB3 proton system 1,1dichloroethane at 60 MHz. A 350.0 B 120.0 Jab 10.00 Hamiltonian

  2. Aalborg Universitet Hierarchical Control for Multiple DC-Microgrids Clusters

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    , and energy storages (e.g., secondary battery and super capacitor) [7]­[15]. Normally, dc MGs are proposed

  3. Energy Training Session for DC Elementary School Teachers

    Broader source: Energy.gov [DOE]

    Are you an elementary school teacher in Washington, DC, looking for creative ideas to introduce energy curriculum to your students?

  4. Exploring the Raft River geothermal area, Idaho, with the dc...

    Open Energy Info (EERE)

    the dc resistivity method (Abstract) Abstract GEOTHERMAL ENERGY; GEOTHERMAL FIELDS; ELECTRICAL SURVEYS; IDAHO; GEOTHERMAL EXPLORATION; RAFT RIVER VALLEY; ELECTRIC CONDUCTIVITY;...

  5. Urbanisation de DC ANF Datacentres 2 Octobre 2014

    E-Print Network [OSTI]

    van Tiggelen, Bart

    Urbanisation de DC ANF Datacentres ­ 2 Octobre 2014 Cargese Urbanisation des Datacentres Romaric David david@unistra.fr Univerité de Strasbourg 2 Octobre 2014 #12;2 Urbanisation de DC ANF Datacentres constructeurs Conclusion #12;3 Urbanisation de DC ANF Datacentres ­ 2 Octobre 2014 Cargese Introduction Centre

  6. D.C. Water Resources Research Center Annual Technical Report

    E-Print Network [OSTI]

    D.C. Water Resources Research Center Annual Technical Report FY 2007 D.C. Water Resources Research of the District of Columbia (DC) Water Resources Research Institute (the Institute) for the period of March 1 relevant water resources research results and transfer information to assist policy makers and residents

  7. Aalborg Universitet Hierarchical Control for Multiple DC Microgrids Clusters

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Hierarchical Control for Multiple DC Microgrids Clusters Shafiee, Qobad). Hierarchical Control for Multiple DC Microgrids Clusters. I E E E Transactions on Energy Conversion, 29(4), 922. Dragicevic, J. C. Vasquez, and J. M. Guerrero, "Hierarchical Control for Multiple DC-Microgrids Clusters

  8. RF MEMS DC CONTACT SWTCHES FOR RECONFIGURABLE Presented to the

    E-Print Network [OSTI]

    Kassegne, Samuel Kinde

    RF MEMS DC CONTACT SWTCHES FOR RECONFIGURABLE ANTENNAS _______________ A Thesis Presented STATE UNIVERSITY The Undersigned Faculty Committee Approves the Thesis of Lei Zhou: RF DC Contact MEMS rock and water, water, through persistence, eventually wins. #12;vi ABSTRACT OF THE THESIS RF MEMS DC

  9. Q&A: Kristen Psaki of WeatherizeDC

    Broader source: Energy.gov [DOE]

    Roughly 20 percent of carbon emissions come from inefficient homes. The DC Project says it has found a way to mitigate emissions and create jobs, a winning combination. WeatherizeDC is the non-profit’s effort to use a community engagement model to help DC residents find green jobs and live a more energy efficient lifestyle.

  10. Energy Challenge Two: The WeatherizeDC Campaign

    Broader source: Energy.gov [DOE]

    WeatherizeDC is a campaign of The DC Project, a nonprofit based in Washington, D.C., founded by former leaders of the Obama for America campaign around a mission to advance economic and environmental justice by creating clean energy career opportunities for people who need them most.

  11. A single-inductor switching DC-DC converter with five outputs and ordered power-distributive control

    E-Print Network [OSTI]

    Le, Hanh-Phuc; Chae, Chang-Seok; Lee, Kwang-Chan; Wang, Se-Won; Cho, Gyu-Ha; Cho, Gyu-Hyeong

    2007-01-01

    integrated current mode boost converter in standard 3.3=5-Vef?ciency CMOS DC-DC boost converter with current sensingdeveloping reset ICs, boost converters for PM OLED, and SIMO

  12. Low Power DC-DC Converters and a Low Quiescent Power High PSRR Class-D Audio Amplifier 

    E-Print Network [OSTI]

    Torres, Joselyn

    2013-12-03

    High-performance DC-DC voltage converters and high-efficient class-D audio amplifiers are required to extend battery life and reduce cost in portable electronics. This dissertation focuses on new system architectures and design techniques...

  13. Design of a step-down DC-DC controller integrated circuit with adaptive dead-time control

    E-Print Network [OSTI]

    Li, Zhipeng, M. Eng. Massachusetts Institute of Technology

    2010-01-01

    A constant-frequency peak current mode synchronous step-down DC-DC controller integrated circuit has been designed with adaptive dead-time control. The adaptive dead-time control circuitry is implemented as digital ...

  14. Master's Thesis proposal TTS Marine AB 2015-10-12 Page 1 of 1 TTS Marine AB

    E-Print Network [OSTI]

    Ahrendt, Wolfgang

    Master's Thesis proposal TTS Marine AB ­ 2015-10-12 Page 1 of 1 TTS Marine AB Tel: +46 31 725 79 00 Fax: +46 31 725 78 00 info@tts-marine.se www.ttsgroup.com Master's Thesis proposal To: Applied, 2015 From: Structural Engineering department- TTS Marine AB Pages: 1 Subject: Thesis work at TTS Marine

  15. Computer-Aided Optimization of dc/dc Converters for Automotive Applications Timothy C. Neugebauer David J. Perreault

    E-Print Network [OSTI]

    Perreault, Dave

    Computer-Aided Optimization of dc/dc Converters for Automotive Applications Timothy C. Neugebauer/dc converters, with a focus on converters for dual-voltage automotive electrical systems. A new CAD optimization is the next evolutionary step for automotive electrical systems. High-power loads will be moved to a new high

  16. WPD Scandinavia AB | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavyAgencyTendo New EnergyWindState Grid JV JumpWKScandinavia AB Jump

  17. PV Enterprise Sweden AB | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to:Newberg,Energy LLC Jump to:3 of Mason County Jump to:EiwaSweden AB

  18. Microsoft Word - Obertellii09_Abs.doc

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJessework uses concrete7 Assessment ofLana Cox (803) 725-4396AbNew developments

  19. Improved DC Gun and Insulator Assembly

    SciTech Connect (OSTI)

    Neubauer, Michael; Johnson, Rolland P

    2015-01-11

    Many user facilities such as synchrotron radiation light sources and free electron lasers rely on DC high voltage photoguns with internal field gradients as high as 10 to 15 MV/m. These high gradients often lead to field emission which poses serious problems for the photocathode used to generate the electron beam and the ceramic insulators used to bias the photocathode at high voltage. Ceramic insulators are difficult to manufacture, require long commissioning times, and have poor reliability, in part because energetic electrons bury themselves in the ceramic causing a buildup of charge and eventual puncture, and also because large diameter ceramics are difficult to braze reliably. The lifetimes of photo cathodes inside high current DC guns exhibiting field emission are limited to less than a hundred hours. Reducing the surface gradients on the metals reduces the field emission, which serves to maintain the required ultrahigh vacuum condition. A novel gun design with gradients around 5 MV/m and operating at 350 kV, a major improvement over existing designs, was proposed that allows for the in-situ replacement of photo cathodes in axially symmetric designs using inverted ceramics. In this project, the existing JLAB CEBAF asymmetric gun design with an inverted ceramic support was modeled and the beam dynamics characterized. An improved structure was designed that reduces the surface gradients and improves the beam optics. To minimize the surface gradients, a number of electrostatic gun designs were studied to determine the optimum configuration of the critical electrodes within the gun structure. Coating experiments were carried out to create a charge dissipative coating for cylindrical ceramics. The phase II proposal, which was not granted, included the design and fabrication of an axially symmetric DC Gun with an inverted ceramic that would operate with less than 5 MV/m at 350 kV and would be designed with an in-situ replaceable photo-cathode.

  20. Quantitative Outgassing studies in DC Electrical breakdown

    E-Print Network [OSTI]

    Levinsen, Yngve Inntjore; Calatroni, Sergio; Taborelli, Mauro; Wünsch, Walter

    2010-01-01

    Breakdown in the accelerating structures sets an important limit to the performance of the CLIC linear collider. Vacuum degradation and subsequent beam instability are possible outcomes of a breakdown if too much gas is released from the cavity surface. Quantitative data of gas released by breakdowns are provided for copper (milled Cu-OFE, as-received and heat-treated), and molybdenum. These data are produced in a DC spark system based on a capacitance charged at fixed energy, and will serve as a reference for the vacuum design of the CLIC accelerating structures.

  1. Dc's blog | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (UtilityInstruments Inc JumpIowa:Minnesota:Daylighting JumpDc's blog Home >

  2. DC Survey 2013 | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouthReport for the t-) S/,,5 'a CConversion |National Laser UserDC

  3. Washington DC | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (Utility Company)Idaho)Vossloh Kiepe JumpWarana Group ofDC Home Linked

  4. Ab Initio Coupled-Cluster Effective Interactions for the Shell...

    Office of Scientific and Technical Information (OSTI)

    Initio Coupled-Cluster Effective Interactions for the Shell Model: Application to Neutron-Rich Oxygen and Carbon Isotopes Citation Details In-Document Search Title: Ab Initio...

  5. BioInvent International AB - Product Pipeline Review - 2014 According...

    Open Energy Info (EERE)

    BioInvent International AB - Product Pipeline Review - 2014 According To Radiant Insights Home > Groups > Future of Condition Monitoring for Wind Turbines Marketresearchri's...

  6. A Reachability-Based Method for Large-Signal Behavior Verification of DC-DC Converters

    E-Print Network [OSTI]

    Liberzon, Daniel

    -loop, large-signal system behavior verification, and iv) switching detail modeling. In open-loop, large´inguez-Garc´ia, Member, IEEE Abstract--A method for large-signal behavior verification of power electronics DC behavior verification, lengthy time-domain simula- tions are conducted to analyze the system response

  7. Ab initio non-relativistic spin dynamics

    SciTech Connect (OSTI)

    Ding, Feizhi; Goings, Joshua J.; Li, Xiaosong; Frisch, Michael J.

    2014-12-07

    Many magnetic materials do not conform to the (anti-)ferromagnetic paradigm where all electronic spins are aligned to a global magnetization axis. Unfortunately, most electronic structure methods cannot describe such materials with noncollinear electron spin on account of formally requiring spin alignment. To overcome this limitation, it is necessary to generalize electronic structure methods and allow each electron spin to rotate freely. Here, we report the development of an ab initio time-dependent non-relativistic two-component spinor (TDN2C), which is a generalization of the time-dependent Hartree-Fock equations. Propagating the TDN2C equations in the time domain allows for the first-principles description of spin dynamics. A numerical tool based on the Hirshfeld partitioning scheme is developed to analyze the time-dependent spin magnetization. In this work, we also introduce the coupling between electron spin and a homogenous magnetic field into the TDN2C framework to simulate the response of the electronic spin degrees of freedom to an external magnetic field. This is illustrated for several model systems, including the spin-frustrated Li{sub 3} molecule. Exact agreement is found between numerical and analytic results for Larmor precession of hydrogen and lithium atoms. The TDN2C method paves the way for the ab initio description of molecular spin transport and spintronics in the time domain.

  8. Micro -Thermonuclear AB-Reactors for Aerospace

    E-Print Network [OSTI]

    Alexander Bolonkin

    2007-01-08

    The author offers several innovations that he first suggested publicly early in 1983 for the AB multi-reflex engine, space propulsion, getting energy from plasma, etc. (see: A. Bolonkin, Non-Rocket Space Launch and Flight, Elsevier, London, 2006, Chapters 12, 3A). It is the micro-thermonuclear AB-Reactors. That is new micro-thermonuclear reactor with very small fuel pellet that uses plasma confinement generated by multi-reflection of laser beam or its own magnetic field. The Lawson criterion increases by hundreds of times. The author also suggests a new method of heating the power-making fuel pellet by outer electric current as well as new direct method of transformation of ion kinetic energy into harvestable electricity. These offered innovations dramatically decrease the size, weight and cost of thermonuclear reactor, installation, propulsion system and electric generator. Non-industrial countries can produce these researches and constructions. Currently, the author is researching the efficiency of these innovations for two types of the micro-thermonuclear reactors: multi-reflection reactor (ICF) and self-magnetic reactor (MCF).

  9. Vehicle Technologies Office Merit Review 2014: DC Fast Charging...

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

    Technologies Office Merit Review 2014: DC Fast Charging Effects on Battery Life and EVSE Efficiency and Security Testing Presentation given by Idaho National Laboratory at 2014...

  10. INL Efficiency and Security Testing of EVSE, DC Fast Chargers...

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

    INL Efficiency and Security Testing of EVSE, DC Fast Chargers, and Wireless Charging Systems May 14, 2013 Project ID VSS096 2013 DOE Vehicle Technologies Program Annual Merit...

  11. Washington DC Reliability Requirements and the Need to Operate...

    Energy Savers [EERE]

    DC Reliability Requirements and the Need to Operate Mirant's Potomac River Generation Station to Support Local Area Reliability (Oak Ridge National Laboratory 2005)...

  12. DC Resistivity Survey (Schlumberger Array) At Raft River Geothermal...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: DC Resistivity Survey (Schlumberger Array) At Raft River Geothermal Area (1974-1975) Exploration...

  13. INL Efficiency and Security Testing of EVSE, DC Fast Chargers...

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

    Testing to support Code & Standards Vehicle Technologies Office Merit Review 2014: DC Fast Charging Effects on Battery Life and EVSE Efficiency and Security Testing Vehicle...

  14. DC Bus Capacitor Manufacturing Facility for Electric Drive Vehicles...

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

    0 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C. apearravt028boan2010...

  15. DC Resistivity Survey (Wenner Array) At Mt Princeton Hot Springs...

    Open Energy Info (EERE)

    2008 - 2010 Usefulness useful DOE-funding Unknown Exploration Basis Determination of groundwater flux patterns Notes Researchers measured DC resistivity and produced 12 resistivity...

  16. DESIGN AND PERFORMANCE OF PEP DC POWER SYSTEMS

    E-Print Network [OSTI]

    Jackson, T.

    2010-01-01

    DC supplies, with no switchgear interposed between the DCthe only transformers and switchgear in the system, and theycost of transformers and switchgear is eliminated from the

  17. Design and analysis of a zero-voltage switching scheme for a dc- to-dc converter 

    E-Print Network [OSTI]

    Arun, G.

    1992-01-01

    DESIGN AND ANALYSIS OF A ZERO-VOLTAGE SSVITCHING SCFIE'. tIE FOR A DC-TO-DC CONVERTER A Thesis by G. ARUN Submitted to the Office of Graduate Studies of Texas ARM 1. niversity in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1992 Major Subject: Electrical Engineering DESIGN AND ANALYSIS OE A ZERO-VOLTAGE SWITCHING SCHEME I'OR A DC-TO-DC CONVERTER A Thesis by G. AR(tN Approved as to style and content by: P. Enjeti (Chair of Cornrnitteel C...

  18. Ab Initio Whole Genome Shotgun Assembly With Mated Short Reads

    E-Print Network [OSTI]

    Toronto, University of

    Ab Initio Whole Genome Shotgun Assembly With Mated Short Reads Paul Medvedev1 and Michael Brudno1 these technologies are already being used for rese- quencing individuals once a reference genome exists, it has not been shown if it is possible to use them for ab initio genome assembly. In this paper, we give a novel

  19. Ab initio alpha-alpha scattering

    E-Print Network [OSTI]

    Serdar Elhatisari; Dean Lee; Gautam Rupak; Evgeny Epelbaum; Hermann Krebs; Timo A. Lähde; Thomas Luu; Ulf-G. Meißner

    2015-06-11

    Processes involving alpha particles and alpha-like nuclei comprise a major part of stellar nucleosynthesis and hypothesized mechanisms for thermonuclear supernovae. In an effort towards understanding alpha processes from first principles, we describe in this letter the first ab initio calculation of alpha-alpha scattering. We use lattice effective field theory to describe the low-energy interactions of nucleons and apply a technique called the adiabatic projection method to reduce the eight-body system to an effective two-cluster system. We find good agreement between lattice results and experimental phase shifts for S-wave and D-wave scattering. The computational scaling with particle number suggests that alpha processes involving heavier nuclei are also within reach in the near future.

  20. Ab initio alpha-alpha scattering

    E-Print Network [OSTI]

    Elhatisari, Serdar; Rupak, Gautam; Epelbaum, Evgeny; Krebs, Hermann; Lähde, Timo A; Luu, Thomas; Meißner, Ulf-G

    2015-01-01

    Processes involving alpha particles and alpha-like nuclei comprise a major part of stellar nucleosynthesis and hypothesized mechanisms for thermonuclear supernovae. In an effort towards understanding alpha processes from first principles, we describe in this letter the first ab initio calculation of alpha-alpha scattering. We use lattice effective field theory to describe the low-energy interactions of nucleons and apply a technique called the adiabatic projection method to reduce the eight-body system to an effective two-cluster system. We find good agreement between lattice results and experimental phase shifts for S-wave and D-wave scattering. The computational scaling with particle number suggests that alpha processes involving heavier nuclei are also within reach in the near future.

  1. Asymptotic normalization coefficients from ab initio calculations

    E-Print Network [OSTI]

    Kenneth M. Nollett; R. B. Wiringa

    2011-04-14

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

  2. High Voltage DC Transmission 1.0 Introduction

    E-Print Network [OSTI]

    McCalley, James D.

    1 High Voltage DC Transmission 1.0 Introduction HVDC has been applied in electric power systems Supplier: ABB Railroa d DC Tie USA - Mission, TX 26°1001N9 8°1925W USA - Mission, TX 26°1001N9 8°1925W 21

  3. DC Optimal Power Flow: Uniqueness and Chee Wei Tan

    E-Print Network [OSTI]

    Tan, Chee Wei

    the minimization of power transmission loss in DC-OPF and char- acterize the uniqueness of its solutions. This hasDC Optimal Power Flow: Uniqueness and Algorithms Chee Wei TanÝ , Desmond W. H. Cai£ and Xin LouÝ Ý and transmission loss in a power net- work subject to physical constraints governed by Kirchhoff's and Ohm's law [1

  4. A 3D Magnetic Force Manipulator DC Prototype

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    A 3D Magnetic Force Manipulator DC Prototype Leandra Vicci Microelectronic Systems Laboratory optical field intensities which interact strongly with many materials and may produce undesired side;Leandra Vicci A 3D Magnetic Force Manipulator DC Prototype 17 October 2001 1 Conceptual design

  5. Read-out electronics for DC squid magnetic measurements

    DOE Patents [OSTI]

    Ganther, Jr., Kenneth R. (Olathe, KS); Snapp, Lowell D. (Independence, MO)

    2002-01-01

    Read-out electronics for DC SQUID sensor systems, the read-out electronics incorporating low Johnson noise radio-frequency flux-locked loop circuitry and digital signal processing algorithms in order to improve upon the prior art by a factor of at least ten, thereby alleviating problems caused by magnetic interference when operating DC SQUID sensor systems in magnetically unshielded environments.

  6. Peter M. Vallone AAFS Washington, D.C.

    E-Print Network [OSTI]

    Peter M. Vallone AAFS Washington, D.C. February 23, 2008 http://www.cstl.nist.gov/biotech available for the purpose. Our publications and presentations are made available at: http://www.cstl.nist.gov/biotech/strbase/NISTpub.htm #12;Peter M. Vallone AAFS Washington, D.C. February 23, 2008 http://www.cstl.nist.gov/biotech

  7. Tutorial, GECCO'05, Washington D.C. Fitness Approximation

    E-Print Network [OSTI]

    Yang, Shengxiang

    1 Tutorial, GECCO'05, Washington D.C. Fitness Approximation in Evolutionary Computation Yaochu Jin Honda Research Institute Europe Khaled Rasheed University of Georgia Tutorial, GECCO'05, Washington D expensive fitness evaluations Tutorial, GECCO'05, Washington D.C. Fitness Approximation Methods · Problem

  8. National Small Business Federal Contracting Summit-DC Fall Conference

    Broader source: Energy.gov [DOE]

    The 2014 National Small Business Federal Contracting Summit - DC Fall Conference is presented jointly by the National Association of Small Business Contractors (the Supplier Council of The American Small Business Chamber of Commerce) and the U.S. Women's Chamber of Commerce in Washington DC.

  9. Dynamic microscopic theory of fusion using DC-TDHF

    SciTech Connect (OSTI)

    Umar, A. S.; Oberacker, V. E.; Keser, R.; Maruhn, J. A.; Reinhard, P.-G.

    2012-10-20

    The density-constrained time-dependent Hartree-Fock (DC-TDHF) theory is a fully microscopic approach for calculating heavy-ion interaction potentials and fusion cross sections below and above the fusion barrier. We discuss recent applications of DC-TDHF method to fusion of light and heavy systems.

  10. Historical Material Analysis of DC745U Pressure Pads

    SciTech Connect (OSTI)

    Ortiz-Acosta, Denisse [Los Alamos National Laboratory

    2012-07-30

    As part of the Enhance Surveillance mission, it is the goal to provide suitable lifetime assessment of stockpile materials. This report is an accumulation of historical publication on the DC745U material and their findings. It is the intention that the B61 LEP program uses this collection of data to further develop their understanding and potential areas of study. DC745U is a commercially available silicone elastomer consisting of dimethyl, methyl-phenyl, and methyl-vinyl siloxane repeat units. Originally, this material was manufactured by Dow Corning as Silastic{reg_sign} DC745U at their manufacturing facility in Kendallville, IN. Recently, Dow Corning shifted this material to the Xiameter{reg_sign} brand product line. Currently, DC745U is available through Xiameter{reg_sign} or Dow Corning's distributor R. D. Abbott Company. DC745U is cured using 0.5 wt% vinyl-specific peroxide curing agent known as Luperox 101 or Varox DBPH-50. This silicone elastomer is used in numerous parts, including two major components (outer pressure pads and aft cap support) in the W80 and as pressure pads on the B61. DC745U is a proprietary formulation, thus Dow Corning provides limited information on its composition and properties. Based on past experience with Dow Corning, DC745U is at risk of formulation changes without notification to the costumer. A formulation change for DC745U may have a significant impact because the network structure is a key variable in determining material properties. The purpose of this report is to provide an overview of historical DC745U studies and identify gaps that need to be addressed in future work. Some of the previous studies include the following: 1. Spectroscopic characterization of raw gum stock. 2. Spectroscopic, thermal, and mechanical studies on cured DC745U. 3. Nuclear Magnetic Resonance (NMR) and solvent swelling studies on DC745U with different crosslink densities. 4. NMR, solvent swelling, thermal, and mechanical studies on thermally aged DC745U. 5. NMR, solvent swelling, thermal, and mechanical studies on radiolytically aged DC745U. Each area is reviewed and further work is suggested to improve our understanding of DC745U for systems engineering, surveillance, aging assessments, and lifetime assessment.

  11. 1668 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 27, NO. 4, APRIL 2012 55-kW Variable 3X DC-DC Converter for Plug-in

    E-Print Network [OSTI]

    Tolbert, Leon M.

    vehicle (HEV) traction drives. The boost converter used in commercial HEVs meets with obstacles when is shown in Fig. 1. In this system, the dc-dc converter boosts the battery voltage from 244 V to three op series-parallel HEV. speed and power demand of the vehicle. In this traditional dc- dc boost converter

  12. New leading/trailing edge modulation strategies for two-stage AC/DC PFC adapters to reduce DC-link capacitor ripple current 

    E-Print Network [OSTI]

    Sun, Jing

    2007-09-17

    PFC stage and trailing edge modulation for the second DC/DC converter stage can significantly reduce the ripple current and ripple voltage of the DC-link capacitor. Thus, a smaller DC-link capacitance can be used, lowering the cost and size of the AC...

  13. Stability of the binary colloidal crystals AB2 and AB13 A. B. Schofield, P. N. Pusey, and P. Radcliffe

    E-Print Network [OSTI]

    Schofield, Andrew B.

    Stability of the binary colloidal crystals AB2 and AB13 A. B. Schofield, P. N. Pusey, and P Suspensions of binary mixtures of hard-sphere poly-methylmethacrylate colloidal particles were studied at six was discovered in computer simulations 4,5 and confirmed by experiments on colloidal suspensions 6

  14. Development of a Novel Bi-Directional Isolated Multiple-Input DC-DC Converter

    SciTech Connect (OSTI)

    Li, H.

    2005-10-24

    There is vital need for a compact, lightweight, and efficient energy-storage system that is both affordable and has an acceptable cycle life for the large-scale production of electric vehicles (EVs) and hybrid electric vehicles (HEVs). Most of the current research employs a battery-storage unit (BU) combined with a fuel cell (FC) stack in order to achieve the operating voltage-current point of maximum efficiency for the FC system. A system block diagram is shown in Fig.1.1. In such a conventional arrangement, the battery is sized to deliver the difference between the energy required by the traction drive and the energy supplied by the FC system. Energy requirements can increase depending on the drive cycle over which the vehicle is expected to operate. Peak-power transients result in an increase of losses and elevated temperatures which result in a decrease in the lifetime of the battery. This research will propose a novel two-input direct current (dc) dc to dc converter to interface an additional energy-storage element, an ultracapacitor (UC), which is shown in Fig.1.2. It will assist the battery during transients to reduce the peak-power requirements of the battery.

  15. Abstract--A design method for digital controller of PWM DC-DC converters was developed, tested by simulations and

    E-Print Network [OSTI]

    domain transformation and discretization. A digital PID controller for a Buck type converter domain and the sampled data domain (via the various transformation algorithms), a digital compensatorAbstract-- A design method for digital controller of PWM DC-DC converters was developed, tested

  16. Phase-Shifted Full Bridge DC-DC Converter with Energy Recovery Clamp and Reduced Circulating Current

    E-Print Network [OSTI]

    Phase-Shifted Full Bridge DC-DC Converter with Energy Recovery Clamp and Reduced Circulating@aei.com Abstract - This paper introduces a full bridge converter with reduced circulating current and a reduction bridge converter operating at 32 kHz switching frequency. Losses and efficiency of the experimental

  17. Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    AC vs. DC distribution: A loss comparison. Transmission andof a DC microgrid for residential houses. In Transmission &DC mainly because it enabled central generation and efficient long-distance power transmission.

  18. Application to Export Electric Energy OE Docket No. EA-351 DC...

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

    1 DC Energy Dakota, LLC Application to Export Electric Energy OE Docket No. EA-351 DC Energy Dakota, LLC Application from DC Energy Dakota, LLC to export electric energy to Canada...

  19. We Have a Winner - DC High School Regional Science Bowl Competition...

    Energy Savers [EERE]

    We Have a Winner - DC High School Regional Science Bowl Competition Held Last Saturday We Have a Winner - DC High School Regional Science Bowl Competition Held Last Saturday...

  20. Ab Initio Derivation of Model Energy Density Functionals

    E-Print Network [OSTI]

    Dobaczewski, J

    2015-01-01

    I propose a simple and manageable method that allows for deriving coupling constants of model energy density functionals (EDFs) directly from ab initio calculations performed for finite fermion systems. A proof-of-principle application allows for linking properties of finite nuclei, determined by using the nuclear nonlocal Gogny functional, to the coupling constants of the quasilocal Skyrme functional. The method does not rely on properties of infinite fermion systems but on the ab initio calculations in finite systems. It also allows for quantifying merits of different model EDFs in describing the ab initio results.

  1. Ab Initio Derivation of Model Energy Density Functionals

    E-Print Network [OSTI]

    J. Dobaczewski

    2015-07-07

    I propose a simple and manageable method that allows for deriving coupling constants of model energy density functionals (EDFs) directly from ab initio calculations performed for finite fermion systems. A proof-of-principle application allows for linking properties of finite nuclei, determined by using the nuclear nonlocal Gogny functional, to the coupling constants of the quasilocal Skyrme functional. The method does not rely on properties of infinite fermion systems but on the ab initio calculations in finite systems. It also allows for quantifying merits of different model EDFs in describing the ab initio results.

  2. New AB-Thermonuclear Reactor for Aerospace

    E-Print Network [OSTI]

    Alexander Bolonkin

    2007-06-14

    There are two main methods of nulcear fusion: inertial confinement fusion (ICF) and magnetic confinement fusion (MCF). Existing thermonuclear reactors are very complex, expensive, large, and heavy. They cannot achieve the Lawson creterion. The author offers an innovation. ICF has on the inside surface of the shell-shaped combustion chamber a covering of small Prism Reflectors (PR) and plasma reflector. These prism reflectors have a noteworthy advantage, in comparison with conventional mirror and especially with conventional shell: they multi-reflect the heat and laser radiation exactly back into collision with the fuel target capsule (pellet). The plasma reflector reflects the Bremsstrahlung radiation. The offered innovation decreases radiation losses, creates significant radiation pressure and increases the reaction time. The Lawson criterion increases by hundreds of times. The size, cost, and weight of a typical installation will decrease by tens of times. The author is researching the efficiency of these innovations. Keywords: Thermonuclear reactor, Multi-reflex AB-thermonuclear reactor, aerospace thermonuclear engine. This work is presented as paper AIAA-2006-7225 to Space-2006 Conference, 19-21 September, 2006, San Jose, CA, USA.

  3. Implementing the DC Mode in Cosmological Simulations with Supercomoving Variables

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

    Gnedin, Nickolay Y; Kravtsov, Andrey V; Rudd, Douglas H

    2011-06-02

    As emphasized by previous studies, proper treatment of the density fluctuation on the fundamental scale of a cosmological simulation volume - the 'DC mode' - is critical for accurate modeling of spatial correlations on scales ~> 10% of simulation box size. We provide further illustration of the effects of the DC mode on the abundance of halos in small boxes and show that it is straightforward to incorporate this mode in cosmological codes that use the 'supercomoving' variables. The equations governing evolution of dark matter and baryons recast with these variables are particularly simple and include the expansion factor, andmore »hence the effect of the DC mode, explicitly only in the Poisson equation.« less

  4. AB Proton NMR Using Tensor Algebra Frank Rioux

    E-Print Network [OSTI]

    Rioux, Frank

    AB Proton NMR Using Tensor Algebra Frank Rioux Professor Emeritus of Chemistry CSB|SJU The purpose of this tutorial is to deviate from the usual matrix mechanics approach to the ABC proton nmr system in order

  5. Thermoelectric DC conductivities and Stokes flows on black hole horizons

    E-Print Network [OSTI]

    Elliot Banks; Aristomenis Donos; Jerome P. Gauntlett

    2015-07-15

    We consider a general class of electrically charged black holes of Einstein-Maxwell-scalar theory that are holographically dual to conformal field theories at finite charge density which break translation invariance explicitly. We examine the linearised perturbations about the solutions that are associated with the thermoelectric DC conductivity. We show that there is a decoupled sector at the black hole horizon which must solve generalised Stokes equations for a charged fluid. By solving these equations we can obtain the DC conductivity of the dual field theory. For one-dimensional lattices we solve the fluid equations to obtain closed form expressions for the DC conductivity in terms of the solution at the black hole horizon. We also determine the leading order DC conductivity for lattices that can be expanded as a perturbative series about translationally invariant solutions.

  6. Radiofrequency amplifier based on a dc superconducting quantum interference device

    DOE Patents [OSTI]

    Hilbert, C.; Martinis, J.M.; Clarke, J.

    1984-04-27

    A low noise radiofrequency amplifer, using a dc SQUID (superconducting quantum interference device) as the input amplifying element. The dc SQUID and an input coil are maintained at superconductivity temperatures in a superconducting shield, with the input coil inductively coupled to the superconducting ring of the dc SQUID. A radiofrequency signal from outside the shield is applied to the input coil, and an amplified radiofrequency signal is developed across the dc SQUID ring and transmitted to exteriorly of the shield. A power gain of 19.5 +- 0.5 dB has been achieved with a noise temperature of 1.0 +- 0.4 K at a frequency of 100 MHz.

  7. National Science Bowl Brings Best and Brightest to DC

    Broader source: Energy.gov [DOE]

    The National Science Bowl Finals in Washington D.C. April 27 to 30 pit 113 high and middle school teams against one another answering questions Jeopardy-style about biology, chemistry, earth science, physics, astronomy, and math.

  8. Thermoelectric DC conductivities and Stokes flows on black hole horizons

    E-Print Network [OSTI]

    Banks, Elliot; Gauntlett, Jerome P

    2015-01-01

    We consider a general class of electrically charged black holes of Einstein-Maxwell-scalar theory that are holographically dual to conformal field theories at finite charge density which break translation invariance explicitly. We examine the linearised perturbations about the solutions that are associated with the thermoelectric DC conductivity. We show that there is a decoupled sector at the black hole horizon which must solve generalised Stokes equations for a charged fluid. By solving these equations we can obtain the DC conductivity of the dual field theory. For one-dimensional lattices we solve the fluid equations to obtain closed form expressions for the DC conductivity in terms of the solution at the black hole horizon. We also determine the leading order DC conductivity for lattices that can be expanded as a perturbative series about translationally invariant solutions.

  9. Thermoelectric DC conductivities with momentum dissipation from higher derivative gravity

    E-Print Network [OSTI]

    Long Cheng; Xian-Hui Ge; Zu-Yao Sun

    2015-04-28

    We present a mechanism of momentum relaxation in higher derivative gravity by adding linear scalar fields to the Gauss-Bonnet theory. We analytically computed all of the DC thermoelectric conductivities in this theory by adopting the method given by Donos and Gauntlett in [arXiv:1406.4742]. The results show that the DC electric conductivity is not a monotonic function of the effective impurity parameter $\\beta$: in the small $\\beta$ limit, the DC conductivity is dominated by the coherent phase, while for larger $\\beta$, pair creation contribution to the conductivity becomes dominant, signaling an incoherent phase. In addition, the DC heat conductivity is found independent of the Gauss-Bonnet coupling constant.

  10. Thermoelectric DC conductivities and Stokes flows on black hole horizons

    E-Print Network [OSTI]

    Elliot Banks; Aristomenis Donos; Jerome P. Gauntlett

    2015-10-11

    We consider a general class of electrically charged black holes of Einstein-Maxwell-scalar theory that are holographically dual to conformal field theories at finite charge density which break translation invariance explicitly. We examine the linearised perturbations about the solutions that are associated with the thermoelectric DC conductivity. We show that there is a decoupled sector at the black hole horizon which must solve generalised Stokes equations for a charged fluid. By solving these equations we can obtain the DC conductivity of the dual field theory. For Q-lattices and one-dimensional lattices we solve the fluid equations to obtain closed form expressions for the DC conductivity in terms of the solution at the black hole horizon. We also determine the leading order DC conductivity for lattices that can be expanded as a perturbative series about translationally invariant solutions.

  11. A Multiphase, Modular, Bidirectional, Triple-Voltage DC-DC Converter Power Systems

    SciTech Connect (OSTI)

    Su, Gui-Jia [ORNL; Tang, Lixin [ORNL

    2008-01-01

    Electrical power systems in future hybrid and fuel cell vehicles may employ three voltage [14 V, 42 V, and high voltage (HV)] nets. These will be necessary to accommodate existing 14-V loads as well as efficiently handle new heavy loads at the 42-V net and a traction drive on the HV bus. A low-cost DC-DC converter was proposed for connecting the three voltage nets. It minimizes the number of switches and their associated gate driver components by using two half-bridges and a high-frequency transformer. Another salient feature is that the half bridge on the 42-V bus is also utilized to provide the 14-V bus by operating at duty ratios around an atypical value of 1/3. Moreover, it makes use of the parasitic capacitance of the switches and the transformer leakage inductance for soft switching. The use of half bridges makes the topology well suited for interleaved multiphase modular configurations as a means to increase the power level because the capacitor legs can be shared. This paper presents simulation and experimental results on an interleaved two-phase arrangement rated at 4.5 kW. Also discussed are the benefits of operating with an atypical duty ratio on the transformer and a preferred multiphase configuration to minimize capacitor ripple currents.

  12. Aalborg Universitet Power flow analysis for droop controlled LV hybrid AC-DC microgrids with virtual

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Power flow analysis for droop controlled LV hybrid AC-DC microgrids controlled LV hybrid AC-DC microgrids with virtual impedance. In Proceedings of the IEEE Power & Energy Interlinking converter PV WT IBS DC microgrid DC microgrid AC microgrid AC Load Figure 1. Structure

  13. Switching power converter Figure 1(a): Switching DC-DC converter with analog voltage-mode control

    E-Print Network [OSTI]

    + ­ RC L Vg 1 2 i + v _ Vref + _ Gc(s) VM = 1 PWM u c Switching power converter H v dTs H = 1 design of digital compensators. I. INTRODUCTION Discrete-time modeling of dc-dc switching converters has IEEE. #12;+ ­ R C L Vg 1 2 i + v _ Vref + _ Gc(z) VM = 1 DPWM u c Switching power converter H v dTs H

  14. A High Efficiency DC-DC Converter Topology Suitable for Distributed Large Commercial and Utility Scale PV Systems

    SciTech Connect (OSTI)

    Mohammed S. Agamy; Maja Harfman-Todorovic; Ahmed Elasser; Robert L. Steigerwald; Juan A. Sabate; Song Chi; Adam J. McCann; Li Zhang; Frank Mueller

    2012-09-01

    In this paper a DC-DC power converter for distributed photovoltaic plant architectures is presented. The proposed converter has the advantages of simplicity, high efficiency, and low cost. High efficiency is achieved by having a portion of the input PV power directly fed forward to the output without being processed by the converter. The operation of this converter also allows for a simplified maximum power point tracker design using fewer measurements

  15. Simplest AB-Thermonuclear Space Propulsion and Electric Generator

    E-Print Network [OSTI]

    Alexander Bolonkin

    2007-01-19

    The author applies, develops and researches mini-sized Micro- AB Thermonuclear Reactors for space propulsion and space power systems. These small engines directly convert the high speed charged particles produced in the thermonuclear reactor into vehicle thrust or vehicle electricity with maximum efficiency. The simplest AB-thermonuclear propulsion offered allows spaceships to reach speeds of 20,000 50,000 km/s (1/6 of light speed) for fuel ratio 0.1 and produces a huge amount of useful electric energy. Offered propulsion system permits flight to any planet of our Solar system in short time and to the nearest non-Sun stars by E-being or intellectual robots during a single human life period. Key words: AB-propulsion, thermonuclear propulsion, space propulsion, thermonuclear power system.

  16. Materials with low DC magnetic susceptibility for sensitive magnetic measurements

    E-Print Network [OSTI]

    Khatiwada, Rakshya; Kendrick, Rachel; Khosravi, Marjan; Peters, Michael; Smith, Erick; Snow, Mike

    2015-01-01

    Materials with very low DC magnetic susceptibility have many scientific applications. To our knowledge however, relatively little research has been conducted with the goal to produce a totally nonmagnetic material. This phrase in our case means after spatially averaging over macroscopic volumes, it possesses an average zero DC magnetic susceptibility. We report measurements of the DC magnetic susceptibility of three different types of nonmagnetic materials at room temperature: (I) solutions of paramagnetic salts and diamagnetic liquids, (II) liquid gallium-indium alloys and (III) pressed powder mixtures of tungsten and bismuth. The lowest measured magnetic susceptibility among these candidate materials is in the order of 10^-9 cgs volume susceptibility units, about two orders of magnitude smaller than distilled water. In all cases, the measured concentration dependence of the magnetic susceptibility is consistent with that expected for the weighted sum of the susceptibilities of the separate components within...

  17. Nonrelativistic molecular models under external magnetic and AB flux fields

    E-Print Network [OSTI]

    Sameer M. Ikhdair; Babatunde J. Falaye; Majid Hamzavi

    2014-12-21

    By using the wave function ansatz method, we study the energy eigenvalues and wave function for any arbitrary $m$-state in two-dimensional Schr\\"{o}dinger wave equation with various power interaction potentials in constant magnetic and Aharonov-Bohm (AB) flux fields perpendicular to the plane where the interacting particles are confined. We calculate the energy levels of some diatomic molecules in the presence and absence of external magnetic and AB flux fields using different potential models. We found that the effect of the Aharonov-Bohm field is much as it creates a wider shift for $m\

  18. Nuclear magnetic resonance experiments with dc SQUID amplifiers

    SciTech Connect (OSTI)

    Heaney, M.B. . Dept. of Physics Lawrence Berkeley Lab., CA )

    1990-11-01

    The development and fabrication of dc SQUIDs (Superconducting QUantum Interference Devices) with Nb/Al{sub 2}O{sub 3}/Nb Josephson junctions is described. A theory of the dc SQUID as a radio-frequency amplifier is presented, with an optimization strategy that accounts for the loading and noise contributions of the postamplifier and maximizes the signal-to-noise ratio of the total system. The high sensitivity of the dc SQUID is extended to high field NMR. A dc SQUID is used as a tuned radio-frequency amplifier to detect pulsed nuclear magnetic resonance at 32 MHz from a metal film in a 3.5 Tesla static field. A total system noise temperature of 11 K has been achieved, at a bath temperature of 4.2 K. The minimum number of nuclear Bohr magnetons observable from a free precession signal after a single pulse is about 2 {times} 10{sup 17} in a bandwidth of 25 kHz. In a separate experiment, a dc SQUID is used as a rf amplifier in a NQR experiment to observe a new resonance response mechanism. The net electric polarization of a NaClO{sub 3} crystal due to the precessing electric quadrupole moments of the Cl nuclei is detected at 30 MHz. The sensitivity of NMR and NQR spectrometers using dc SQUID amplifiers is compared to the sensitivity of spectrometers using conventional rf amplifiers. A SQUID-based spectrometer has a voltage sensitivity which is comparable to the best achieved by a FET-based spectrometer, at these temperatures and operating frequencies.

  19. Graphite electrode DC arc furnace. Innovative technology summary report

    SciTech Connect (OSTI)

    1999-05-01

    The Graphite Electrode DC Arc Furnace (DC Arc) is a high-temperature thermal process, which has been adapted from a commercial technology, for the treatment of mixed waste. A DC Arc Furnace heats waste to a temperature such that the waste is converted into a molten form that cools into a stable glassy and/or crystalline waste form. Hazardous organics are destroyed through combustion or pyrolysis during the process and the majority of the hazardous metals and radioactive components are incorporated in the molten phase. The DC Arc Furnace chamber temperature is approximately 593--704 C and melt temperatures are as high as 1,500 C. The DC Arc system has an air pollution control system (APCS) to remove particulate and volatiles from the offgas. The advantage of the DC Arc is that it is a single, high-temperature thermal process that minimizes the need for multiple treatment systems and for extensive sorting/segregating of large volumes of waste. The DC Arc has the potential to treat a wide range of wastes, minimize the need for sorting, reduce the final waste volumes, produce a leach resistant waste form, and destroy organic contaminants. Although the DC arc plasma furnace exhibits great promise for treating the types of mixed waste that are commonly present at many DOE sites, several data and technology deficiencies were identified by the Mixed Waste Focus Area (MWFA) regarding this thermal waste processing technique. The technology deficiencies that have been addressed by the current studies include: establishing the partitioning behavior of radionuclides, surrogates, and hazardous metals among the product streams (metal, slag, and offgas) as a function of operating parameters, including melt temperature, plenum atmosphere, organic loading, chloride concentration, and particle size; demonstrating the efficacy of waste product removal systems for slag and metal phases; determining component durability through test runs of extended duration, evaluating the effect of feed composition variations on process operating conditions and slag product performance; and collecting mass balance and operating data to support equipment and instrument design.

  20. Inductorless DC-AC Cascaded H-bridge Multilevel Boost Inverter for Electric/Hybrid Electric Vehicle

    E-Print Network [OSTI]

    Tolbert, Leon M.

    - DC boost converter to boost the battery voltage for a traditional 3-phase inverter. The present HEV continuous power rating. Currently available power inverter systems for HEVs use a DC-DC boost converter power, the DC-DC boost converter is not needed and the battery voltage will be directly applied

  1. Characterization of the PvdS-regulated promoter motif in Pseudomonas syringae pv. tomato DC3000 reveals

    E-Print Network [OSTI]

    Myers, Chris

    Characterization of the PvdS-regulated promoter motif in Pseudomonas syringae pv. tomato DC3000S, a group IV sigma factor encoded by Pseudomonas syringae pv. tomato DC3000 (DC3000), a plant pathogen, 2002; Potvin et al., 2008). The model plant pathogen Pseudomonas syringae pv. tomato DC3000 (DC3000

  2. High voltage dc--dc converter with dynamic voltage regulation and decoupling during load-generated arcs

    DOE Patents [OSTI]

    Shimer, D.W.; Lange, A.C.

    1995-05-23

    A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules. 5 Figs.

  3. High voltage dc-dc converter with dynamic voltage regulation and decoupling during load-generated arcs

    DOE Patents [OSTI]

    Shimer, Daniel W. (Danville, CA); Lange, Arnold C. (Livermore, CA)

    1995-01-01

    A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules.

  4. MERIT Dismantling I.Efthymiopoulos CERN, AB Dept

    E-Print Network [OSTI]

    McDonald, Kirk

    MERIT Dismantling I.Efthymiopoulos ­ CERN, AB Dept Special thanks to: Michael Lazzaroni, Adrian Fabich and the CERN transport crew MERIT ­ Meeting March 26, 2008 #12;Dismantling schedule Dismantling.Efthymiopoulos - CERN 2 #12;MERIT Dismantling ­ March 18, 2008 March 26, 2008 I.Efthymiopoulos - CERN 3 #12;MERIT

  5. Lithium Insertion In Silicon Nanowires: An ab Initio Study

    E-Print Network [OSTI]

    Cui, Yi

    opportunities for energy storage. However, a systematic theoretical study on lithium insertion in SiNWs remains storage devices. Silicon has the highest known specific charge capacity (4200 mAh/g), which is 10 timesLithium Insertion In Silicon Nanowires: An ab Initio Study Qianfan Zhang, Wenxing Zhang, Wenhui Wan

  6. BNL-65897-AB NEW DETECTABILITY IN ATMOSPHERIC PERFLUOROCARBON TRACING

    E-Print Network [OSTI]

    BNL-65897-AB NEW DETECTABILITY IN ATMOSPHERIC PERFLUOROCARBON TRACING Russell N. Dietz, Gunnar I-source releases initially impacted the coast over a 5- to 40-mile extent; the next day, in some cases.S. Department of Energy under Contract No. DE-AC02-98CH10886. #12;

  7. BNL-68198-AB COMPILATION OF INVENTORIES OF INDUSTRIAL EMISSIONS

    E-Print Network [OSTI]

    BNL-68198-AB COMPILATION OF INVENTORIES OF INDUSTRIAL EMISSIONS Carmen M. Benkovitz Atmospheric inventories additional parnmeters (such as sulfur content of fuels). To compile regional and global by national experts or directly estimate emissions based on activity rates from reports compiled by multi

  8. Models for Longitudinal Network Data Tom A.B. Snijders

    E-Print Network [OSTI]

    Fienberg, Stephen E.

    Models for Longitudinal Network Data Tom A.B. Snijders ICS, Department of Sociology University are made at discrete time points (two or more). Three models are considered in detail, all based, but lacks other structural effects. The actor-oriented model is based on a model of actors changing

  9. Nitrogen Contamination in Elastic Neutron Scattering Songxue Chi,ab

    E-Print Network [OSTI]

    Lynn, Jeffrey W.

    Nitrogen Contamination in Elastic Neutron Scattering Songxue Chi,ab Jeffrey W. Lynn,a* Ying Chen a neutron scattering measurement is a contribution to the background, especially in inelastic measurements of having N2 in the sample environment system during elastic neutron scattering measurements on a single

  10. Ab Frhjahr 2009 startet hier der Bau von sechs Offshore-

    E-Print Network [OSTI]

    Nejdl, Wolfgang

    Ab Frühjahr 2009 startet hier der Bau von sechs Offshore- Windenergieanlagen (OWEA) vom Typ Ent- wicklung der Offshore-Wind- energie besondere Bedeutung zu. Derzeit laufen in der Aus Vorhaben durchgeführt. Acht Einleitung Ziel der Bundesregierung ist es, bis zum Jahr 2030 Offshore

  11. Contract NNS07AB21C Page 5 of 1478

    E-Print Network [OSTI]

    Christian, Eric

    System/ANSI/ISO/ASQC Q9001-2000 E.5 Quality Assurance Surveillance Plan #12;Contract NNS07AB21C Page 6, Certifications, and Other Statements of Offerors H.4 Small Business Subcontracting Plan H.5 Reserved H.6

  12. Ultrafine particles in cities Prashant Kumar a,b,

    E-Print Network [OSTI]

    Cooper, Robin L.

    Review Ultrafine particles in cities Prashant Kumar a,b, , Lidia Morawska c , Wolfram Birmili d Analysis (IIASA), Laxenburg, Austria g State Key Joint Laboratory of Environmental Simulation and Pollution 4 February 2014 Keywords: City environment Particle exposure Health impacts Particle number

  13. Heat transfer in proteinwater interfaces Anders Lervik,ab

    E-Print Network [OSTI]

    Kjelstrup, Signe

    Heat transfer in protein­water interfaces Anders Lervik,ab Fernando Bresme,*ac Signe Kjelstrup of the heat diffusion equation we compute the thermal conductivity and thermal diffusivity of the proteins by about 4 nm.4 It is expected that the energy transfer between these sites may involve the concerted

  14. AB Proton NMR Analysis for 2,3dibromothiophene Frank Rioux

    E-Print Network [OSTI]

    Rioux, Frank

    AB Proton NMR Analysis for 2,3dibromothiophene Frank Rioux CSB|SJU The purpose proton nmr spectrum. The nuclear magnetic energy operator for the AB system is given below. ^ ^ ^ ^ ^A B

  15. Ab Initio Many-Body Calculations Of Light-Ion Reactions | SciTech...

    Office of Scientific and Technical Information (OSTI)

    Conference: Ab Initio Many-Body Calculations Of Light-Ion Reactions Citation Details In-Document Search Title: Ab Initio Many-Body Calculations Of Light-Ion Reactions You are...

  16. Ab Initio Thermodynamic Study of the CO2 Capture Properties of...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Ab Initio Thermodynamic Study of the CO2 Capture Properties of Potassium Carbonate Sesquihydrate, K2CO31.5H2O Citation Details In-Document Search Title: Ab...

  17. D.C. Water Resource Research Center Annual Technical Report

    E-Print Network [OSTI]

    strengthening a credible program. Proposals submitted to USGS for the 2002 fiscal year was approved and funding to the success of the Institute. Hence, the goals of 2002 fiscal year will continue to fiscal 2003 while DC water resources information has been significantly delayed because UDC website, which hosts WRRI

  18. DC WRRC Report No. 59 DEVELOPMENT OF FREQUENCY

    E-Print Network [OSTI]

    District of Columbia, University of the

    #12;DC WRRC Report No. 59 DEVELOPMENT OF FREQUENCY FUNCTIONS FOR URBAN NON-POINT SOURCE RISK THE CATHOLIC UNIVERSITY OF AMERICA "This work on which this report is based was supported in part by funds guidance during the entire course of the work. Ms. Cathy Saunders served as research assistant

  19. DC WRRC Report No. 139 BOOK OF ABSTRACTS

    E-Print Network [OSTI]

    District of Columbia, University of the

    Washington, DC 20008 , (202) 274- 6400 #12;Table of Contents Preface i I. Social Sciences 1 II. Ground Water THE FEDERAL WATER POLLUTION CONTROL ACT AMENDMENTS OF 1972 Lieber, H. WRRC Report No. 17 DESCRWWRS: Management 208 of the Clean Water Act was examined. The accomplishments and failures of the 208 plans were

  20. Natural Gas Pipeline Leaks Across Washington, DC Robert B. Jackson,,,

    E-Print Network [OSTI]

    Jackson, Robert B.

    Natural Gas Pipeline Leaks Across Washington, DC Robert B. Jackson,,, * Adrian Down, Nathan G increased in recent decades, but incidents involving natural gas pipelines still cause an average of 17 fatalities and $133 M in property damage annually. Natural gas leaks are also the largest anthropogenic

  1. Winter Break Trip 2014 New York City & Washington DC

    E-Print Network [OSTI]

    Hutcheon, James M.

    Winter Break Trip 2014 New York City & Washington DC Tentative Trip Information December 13/Meadowlands 575 Park Plaza Drive Secaucus, NJ 07094 (201) 422-9480 Hotel is located 3 miles west of New York City for departure at 5pm. · Public Transportation to and from the city o Bus stop is at NW E ST & NW New Jersey Ave

  2. HYBRID DC ACCURATE CHARGE AMPLIFIER FOR LINEAR PIEZOELECTRIC POSITIONING

    E-Print Network [OSTI]

    Fleming, Andrew J.

    the diverse literature in- volving piezoelectric applications is the problem of hysteresis (Adriaens et alHYBRID DC ACCURATE CHARGE AMPLIFIER FOR LINEAR PIEZOELECTRIC POSITIONING Andrew J. Fleming, S. O, Australia 2308 Abstract: Piezoelectric transducers are known to exhibit less hysterisis when driven

  3. DC WRRC Report No. 170 Program ReportAnnual

    E-Print Network [OSTI]

    District of Columbia, University of the

    the people living in the north east of Washington, D.C. and measured the degree of their interest products constitute their endorsement by the United States Government. #12;The project entitled "A Pilot of groundwater inflows requires a knowledge of the hydraulic conductivity or permeability of the sediments

  4. Qualifying Exam Presentation: DC Discharge Studies Using PIC-MCC

    E-Print Network [OSTI]

    Wurtele, Jonathan

    Qualifying Exam Presentation: DC Discharge Studies Using PIC-MCC Jeffrey Hammel Department during cylindrical magnetron sputtering To assess the applicability of the PIC-MCC method for modeling;Presentation Overview I. Introduction II. Theory A. Paschen's Law B. Positive Column III. PIC-MCC Simulations A

  5. D.C. Water Resources Research Center Annual Technical Report

    E-Print Network [OSTI]

    of DC municipal drinking water quality through random sampling and testing of residential homes that could literally transform the lives of people, especially in the area of water availability. Mr. David. The Institute and the Cooperative Extension Service also added a solar powered weather station to the site

  6. Fuzzy Estimation of DC Motor Winding Currents Innovatia Software

    E-Print Network [OSTI]

    Simon, Dan

    Fuzzy Estimation of DC Motor Winding Currents Dan Simon Innovatia Software 775 Rothrock Circle °ux is rotated in the desired direction of ofuzzy ¯ltering to motor winding current estimation stator windings. an attractive alternative to current estimation using In order to implement an e

  7. 30th March 2007 A.Fabich, CERN AB-ATB 1 Status of the Experiment

    E-Print Network [OSTI]

    McDonald, Kirk

    badge and electronic dosimeter obligatory For a limited time period. AB/OP is informed about the access

  8. The robustness of keystone indices in food webs Anna Fedor a,b,, Vera Vasas a,b

    E-Print Network [OSTI]

    Chittka, Lars

    The robustness of keystone indices in food webs Anna Fedor a,b,Ã, Vera Vasas a,b a E¨otv¨os Lorand Accepted 2 July 2009 Available online 8 July 2009 Keywords: Network construction Keystone species Food web are called keystone species. Network indices are increasingly used to identify them, e.g. for conservation

  9. DC powerline communication system using a transmission line transformer for high degree of freedom applications

    E-Print Network [OSTI]

    Wade, Eric R. (Eric Randolph), 1978-

    2004-01-01

    A new type of powerline communication is developed to reduce cable requirements for robotic, electromechanical, and vehicular systems. A DC power bus line connecting a DC power supply to motor drives and sensor units is ...

  10. If you reside in WASHINGTON, DC - MD -VA - WV your salary will...

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

    If you are employed in the WASHINGTON, DC Metropolitan Area (D.C., Baltimore, Northern VA, Eastern WV, and Southern PA) your salary will range from: Pay Band Pay Plan(s) Minimum...

  11. Energy Secretary Moniz's Remarks at CSIS in Washington D.C. on...

    Energy Savers [EERE]

    Moniz's Remarks at CSIS in Washington D.C. on Energy Security 40 Years after the Embargo - As Delivered Energy Secretary Moniz's Remarks at CSIS in Washington D.C. on Energy...

  12. D.C. Middle and High School Students Get a Chance to Experience...

    Energy Savers [EERE]

    D.C. Middle and High School Students Get a Chance to Experience the Regional Science Bowl Competition Setting D.C. Middle and High School Students Get a Chance to Experience the...

  13. Recovery Act: Integrated DC-DC Conversion for Energy-Efficient Multicore Processors

    SciTech Connect (OSTI)

    Shepard, Kenneth L

    2013-03-31

    In this project, we have developed the use of thin-film magnetic materials to improve in energy efficiency of digital computing applications by enabling integrated dc-dc power conversion and management with on-chip power inductors. Integrated voltage regulators also enables fine-grained power management, by providing dynamic scaling of the supply voltage in concert with the clock frequency of synchronous logic to throttle power consumption at periods of low computational demand. The voltage converter generates lower output voltages during periods of low computational performance requirements and higher output voltages during periods of high computational performance requirements. Implementation of integrated power conversion requires high-capacity energy storage devices, which are generally not available in traditional semiconductor processes. We achieve this with integration of thin-film magnetic materials into a conventional complementary metal-oxide-semiconductor (CMOS) process for high-quality on-chip power inductors. This project includes a body of work conducted to develop integrated switch-mode voltage regulators with thin-film magnetic power inductors. Soft-magnetic materials and inductor topologies are selected and optimized, with intent to maximize efficiency and current density of the integrated regulators. A custom integrated circuit (IC) is designed and fabricated in 45-nm CMOS silicon-on-insulator (SOI) to provide the control system and power-train necessary to drive the power inductors, in addition to providing a digital load for the converter. A silicon interposer is designed and fabricated in collaboration with IBM Research to integrate custom power inductors by chip stacking with the 45-nm CMOS integrated circuit, enabling power conversion with current density greater than 10A/mm2. The concepts and designs developed from this work enable significant improvements in performance-per-watt of future microprocessors in servers, desktops, and mobile devices. These new approaches to scaled voltage regulation for computing devices also promise significant impact on electricity consumption in the United States and abroad by improving the efficiency of all computational platforms. In 2006, servers and datacenters in the United States consumed an estimated 61 billion kWh or about 1.5% of the nation's total energy consumption. Federal Government servers and data centers alone accounted for about 10 billion kWh, for a total annual energy cost of about $450 million. Based upon market growth and efficiency trends, estimates place current server and datacenter power consumption at nearly 85 billion kWh in the US and at almost 280 billion kWh worldwide. Similar estimates place national desktop, mobile and portable computing at 80 billion kWh combined. While national electricity utilization for computation amounts to only 4% of current usage, it is growing at a rate of about 10% a year with volume servers representing one of the largest growth segments due to the increasing utilization of cloud-based services. The percentage of power that is consumed by the processor in a server varies but can be as much as 30% of the total power utilization, with an additional 50% associated with heat removal. The approaches considered here should allow energy efficiency gains as high as 30% in processors for all computing platforms, from high-end servers to smart phones, resulting in a direct annual energy savings of almost 15 billion kWh nationally, and 50 billion kWh globally. The work developed here is being commercialized by the start-up venture, Ferric Semiconductor, which has already secured two Phase I SBIR grants to bring these technologies to the marketplace.

  14. Fig.1: Digital Controller with modified buck-boost converter LOAD-INTERACTIVE STEERED-INDUCTOR DC-DC

    E-Print Network [OSTI]

    Prodiæ, Aleksandar

    Fig.1: Digital Controller with modified buck-boost converter LOAD-INTERACTIVE STEERED-INDUCTOR DC-inverting buck- boost. Transient response results show that, compared to standard converters with near-inverting buck-boost converter, i.e. steered-inductor buck-boost, a digital controller, and a communication block

  15. Building Scale DC Microgrids Chris Marnay, Steven Lanzisera, Michael Stadler, and Judy Lai

    E-Print Network [OSTI]

    of building loads are either native DC, such as electronics and compact fluorescent and light emitting diode

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

    Broader source: Energy.gov [DOE]

    Presentation describes potential Federal on-site solar aggregation opportunities in Washington, D.C., and Maryland.

  17. Interviews in Washington, DC for Albert Einstein Fellowship Semi-Finalists

    Broader source: Energy.gov [DOE]

    Selected semi-finalists in the Albert Einstein Distinguished Educator Fellowship are invited to DC for interviews.

  18. Demonstration of LED Retrofit Lamps at the Smithsonian Art Museum, Washington, DC

    SciTech Connect (OSTI)

    Miller, N. J.; Rosenfeld, S. M.

    2012-06-01

    GATEWAY program report on a demonstration of LED retrofit lamps at the Smithsonian American Art Museum in Washington, DC.

  19. Sputter target erosion and its effects on long duration DC magnetron sputter coating

    E-Print Network [OSTI]

    Schoff, Michael Elliott

    2009-01-01

    Duration DC Magnetron Sputter Coating A thesis submitted in1 II. Sputter Coating24 VII. Coating Rate vs.

  20. A nonlinear robust HVDC control for a parallel AC/DC power system

    E-Print Network [OSTI]

    Qu, Zhihua

    recognized that, through an HVDC transmission line, fast electronic control can be applied on the DC power, controlling DC line transmission power can improve stability of the AC system after a major disturbanceA nonlinear robust HVDC control for a parallel AC/DC power system Hongzhi Cai a , Zhihua Qu b

  1. Towards Building an Optimal Demand Response Framework for DC Distribution Networks

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Towards Building an Optimal Demand Response Framework for DC Distribution Networks Hamed Mohsenian, an optimization-based foundation is proposed for demand response in DC distribution networks in presence to assess the performance and to gain insights into the proposed demand-response paradigm. Keywords: DC

  2. Aalborg Universitet Generation-Side Power Scheduling in a Grid-Connected DC Microgrid

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Generation-Side Power Scheduling in a Grid-Connected DC Microgrid Hernández). Generation-Side Power Scheduling in a Grid-Connected DC Microgrid. In IEEE ICDCM 2015. IEEE. General rights.aau.dk on: juli 04, 2015 #12;Generation-Side Power Scheduling in a Grid-Connected DC Microgrid Adriana C

  3. Aalborg Universitet Modeling, Stability Analysis and Active Stabilization of Multiple DC-Microgrids Clusters

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Modeling, Stability Analysis and Active Stabilization of Multiple DC-Microgrids and Active Stabilization of Multiple DC-Microgrids Clusters. In Proceedings of the 2014 IEEE International of Multiple DC-Microgrid Clusters," in Proc. IEEE International Energy Conference (EnergyCon'14), 2014

  4. Aalborg Universitet Agent-based distributed hierarchical control of dc microgrid systems

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Agent-based distributed hierarchical control of dc microgrid systems Meng, J. M., & Dragicevic, T. (2014). Agent-based distributed hierarchical control of dc microgrid systems-BASED DISTRIBUTED HIERARCHICAL CONTROL OF DC MICROGRID SYSTEMS Lexuan Meng, Tomislav Dragicevic, Josep M. Guerrero

  5. OLENDER REPORTING, INC. 1100 Connecticut Avenue NW, #810, Washington, DC 20036

    E-Print Network [OSTI]

    1 OLENDER REPORTING, INC. 1100 Connecticut Avenue NW, #810, Washington, DC 20036 Washington: 202 Avenue17 Washington, D.C.18 19 20 21 22 #12;2 OLENDER REPORTING, INC. 1100 Connecticut Avenue NW, #810 #12;3 OLENDER REPORTING, INC. 1100 Connecticut Avenue NW, #810, Washington, DC 20036 Washington: 202

  6. Control of a Fuel-Cell Powered DC Electric Vehicle Motor

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Control of a Fuel-Cell Powered DC Electric Vehicle Motor Federico Zenith Sigurd Skogestad Meeting, 2005 www.ntnu.no Federico Zenith, Sigurd Skogestad, Control of a Fuel-Cell Powered DC Electric Vehicle Motor #12;2 Outline 1) Control of Fuel Cells--Status 2) Dynamic Modelling of Fuel Cells 3) DC

  7. Spin-orbit decomposition of ab initio wavefunctions

    E-Print Network [OSTI]

    Calvin W. Johnson

    2015-04-13

    Although the modern shell-model picture of atomic nuclei is built from single-particle orbits with good total angular momentum $j$, leading to $j$-$j$ coupling, phenomenological models suggested decades ago that for $0p$-shell nuclides a simpler picture can be realized via coupling of total spin $S$ and total orbital angular momentum $L$. I revisit this idea with large-basis, no-core shell model (NCSM) calculations using modern \\textit{ab initio} two-body interactions, and dissect the resulting wavefunctions into their component $L$- and $S$-components. Remarkably, there is broad agreement with calculations using the phenomenological Cohen-Kurath forces, despite a gap of nearly fifty years and six orders of magnitude in basis dimensions. I suggest $L$-$S$ may be a useful tool for analyzing \\textit{ab initio} wavefunctions of light nuclei, for example in the case of rotational bands.

  8. Ab initio calculations of light-ion fusion reactions

    SciTech Connect (OSTI)

    Hupin, G.; Quaglioni, S.; Navratil, P.

    2012-10-20

    The exact treatment of nuclei starting from the constituent nucleons and the fundamental interactions among them has been a long-standing goal in nuclear physics. Above all nuclear scattering and reactions, which require the solution of the many-body quantum-mechanical problem in the continuum, represent an extraordinary theoretical as well as computational challenge for ab initio approaches. The ab initio No-Core Shell Model/Resonating-Group Method (NCSM/RGM) complements a microscopic cluster technique with the use of realistic interactions, and a microscopic and consistent description of the nucleon clusters. This approach is capable of describing simultaneously both bound and scattering states in light nuclei. Recent applications to light nuclei scattering and fusion reactions relevant to energy production in stars and Earth based fusion facilities, such as the deuterium-{sup 3}He fusion, are presented. Progress toward the inclusion of the three nucleon force into the formalism is outlined.

  9. Ab initio calculations of nuclear widths via an integral relation

    E-Print Network [OSTI]

    Kenneth M. Nollett

    2012-05-31

    I describe the computation of energy widths of nuclear states using an integral over the interaction region of ab initio variational Monte Carlo wave functions, and I present calculated widths for many states. I begin by presenting relations that connect certain short-range integrals to widths. I then present predicted widths for 5 integral relation, I conclude that overlap calculations can diagnose cases in which computed widths should not be trusted.

  10. Multilevel cascade voltage source inverter with separate DC sources

    DOE Patents [OSTI]

    Peng, F.Z.; Lai, J.S.

    1997-06-24

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations. 15 figs.

  11. Multilevel cascade voltage source inverter with seperate DC sources

    DOE Patents [OSTI]

    Peng, Fang Zheng (Oak Ridge, TN); Lai, Jih-Sheng (Knoxville, TN)

    1997-01-01

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

  12. Multilevel cascade voltage source inverter with seperate DC sources

    DOE Patents [OSTI]

    Peng, Fang Zheng; Lai, Jih-Sheng

    2001-04-03

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

  13. Multilevel cascade voltage source inverter with seperate DC sources

    DOE Patents [OSTI]

    Peng, Fang Zheng (Knoxville, TN); Lai, Jih-Sheng (Blacksburg, VA)

    2002-01-01

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

  14. Ab initio calculations of reactions with light nuclei

    E-Print Network [OSTI]

    S. Quaglioni; G. Hupin; A. Calci; P. Navratil; R. Roth

    2015-09-30

    An {\\em ab initio} (i.e., from first principles) theoretical framework capable of providing a unified description of the structure and low-energy reaction properties of light nuclei is desirable to further our understanding of the fundamental interactions among nucleons, and provide accurate predictions of crucial reaction rates for nuclear astrophysics, fusion-energy research, and other applications. In this contribution we review {\\em ab initio} calculations for nucleon and deuterium scattering on light nuclei starting from chiral two- and three-body Hamiltonians, obtained within the framework of the {\\em ab initio} no-core shell model with continuum. This is a unified approach to nuclear bound and scattering states, in which square-integrable energy eigenstates of the $A$-nucleon system are coupled to $(A-a)+a$ target-plus-projectile wave functions in the spirit of the resonating group method to obtain an efficient description of the many-body nuclear dynamics both at short and medium distances and at long ranges.

  15. Ab Initio Nuclear Structure and Reaction Calculations for Rare Isotopes

    SciTech Connect (OSTI)

    Draayer, Jerry P.

    2014-09-28

    We have developed a novel ab initio symmetry-adapted no-core shell model (SA-NCSM), which has opened the intermediate-mass region for ab initio investigations, thereby providing an opportunity for first-principle symmetry-guided applications to nuclear structure and reactions for nuclear isotopes from the lightest p-shell systems to intermediate-mass nuclei. This includes short-lived proton-rich nuclei on the path of X-ray burst nucleosynthesis and rare neutron-rich isotopes to be produced by the Facility for Rare Isotope Beams (FRIB). We have provided ab initio descriptions of high accuracy for low-lying (including collectivity-driven) states of isotopes of Li, He, Be, C, O, Ne, Mg, Al, and Si, and studied related strong- and weak-interaction driven reactions that are important, in astrophysics, for further understanding stellar evolution, X-ray bursts and triggering of s, p, and rp processes, and in applied physics, for electron and neutrino-nucleus scattering experiments as well as for fusion ignition at the National Ignition Facility (NIF).

  16. Ab initio calculations of reactions with light nuclei

    E-Print Network [OSTI]

    Quaglioni, S; Calci, A; Navratil, P; Roth, R

    2015-01-01

    An {\\em ab initio} (i.e., from first principles) theoretical framework capable of providing a unified description of the structure and low-energy reaction properties of light nuclei is desirable to further our understanding of the fundamental interactions among nucleons, and provide accurate predictions of crucial reaction rates for nuclear astrophysics, fusion-energy research, and other applications. In this contribution we review {\\em ab initio} calculations for nucleon and deuterium scattering on light nuclei starting from chiral two- and three-body Hamiltonians, obtained within the framework of the {\\em ab initio} no-core shell model with continuum. This is a unified approach to nuclear bound and scattering states, in which square-integrable energy eigenstates of the $A$-nucleon system are coupled to $(A-a)+a$ target-plus-projectile wave functions in the spirit of the resonating group method to obtain an efficient description of the many-body nuclear dynamics both at short and medium distances and at long...

  17. AVTA: Battery Testing- DC Fast Charging's Effects on PEV Batteries

    Broader source: Energy.gov [DOE]

    The Vehicle Technologies Office's Advanced Vehicle Testing Activity carries out testing on a wide range of advanced vehicles and technologies on dynamometers, closed test tracks, and on-the-road. These results provide benchmark data that researchers can use to develop technology models and guide future research and development. The following report describes DC fast charging's effects on plug-in electric vehicle batteries. This research was conducted by Idaho National Laboratory.

  18. The Use of DC Glow Discharges as Undergraduate Educational Tools

    SciTech Connect (OSTI)

    Stephanie A. Wissel and Andrew Zwicker, Jerry Ross, and Sophia Gershman

    2012-10-09

    Plasmas have a beguiling way of getting students excited and interested in physics. We argue that plasmas can and should be incorporated into the undergraduate curriculum as both demonstrations and advanced investigations of electromagnetism and quantum effects. Our device, based on a direct current (DC) glow discharge tube, allows for a number of experiments into topics such as electrical breakdown, spectroscopy, magnetism, and electron temperature.

  19. dc-plasma-sprayed electronic-tube device

    DOE Patents [OSTI]

    Meek, T.T.

    1982-01-29

    An electronic tube and associated circuitry which is produced by dc plasma arc spraying techniques is described. The process is carried out in a single step automated process whereby both active and passive devices are produced at very low cost. The circuitry is extremely reliable and is capable of functioning in both high radiation and high temperature environments. The size of the electronic tubes produced are more than an order of magnitude smaller than conventional electronic tubes.

  20. Synthesis of silicon nanotubes by DC arc plasma method

    SciTech Connect (OSTI)

    Tank, C. M.; Bhoraskar, S. V.; Mathe, V. L.

    2012-06-05

    Plasma synthesis is a novel technique of synthesis of nanomaterials as they provide high rate of production and promote metastable reactions. Very thin walled silicon nanotubes were synthesized in a DC direct arc thermal plasma reactor. The effect of parameters of synthesis i.e. arc current and presence of hydrogen on the morphology of Si nanoparticles is reported. Silicon nanotubes were characterized by Transmission Electron Microscopy (TEM), Local Energy Dispersive X-ray analysis (EDAX), and Scanning Tunneling Microscopy (STM).

  1. Report on Non-Contact DC Electric Field Sensors

    SciTech Connect (OSTI)

    Miles, R; Bond, T; Meyer, G

    2009-06-16

    This document reports on methods used to measure DC electrostatic fields in the range of 100 to 4000 V/m using a non-contact method. The project for which this report is written requires this capability. Non-contact measurements of DC fields is complicated by the effect of the accumulation of random space-charges near the sensors which interfere with the measurement of the field-of-interest and consequently, many forms of field measurements are either limited to AC measurements or use oscillating devices to create pseudo-AC fields. The intent of this document is to report on methods discussed in the literature for non-contact measurement of DC fields. Electric field meters report either the electric field expressed in volts per distance or the voltage measured with respect to a ground reference. Common commercial applications for measuring static (DC) electric fields include measurement of surface charge on materials near electronic equipment to prevent arcing which can destroy sensitive electronic components, measurement of the potential for lightning to strike buildings or other exposed assets, measurement of the electric fields under power lines to investigate potential health risks from exposure to EM fields and measurement of fields emanating from the brain for brain diagnostic purposes. Companies that make electric field sensors include Trek (Medina, NY), MKS Instruments, Boltek, Campbell Systems, Mission Instruments, Monroe Electronics, AlphaLab, Inc. and others. In addition to commercial vendors, there are research activities continuing in the MEMS and optical arenas to make compact devices using the principles applied to the larger commercial sensors.

  2. USCOMM-WB-DC PRELIMZNARY REPORT OH HURRICANE DAISY

    E-Print Network [OSTI]

    QC 945.2 .D3 H8 1958 c.2 #12;#12;USCOMM-WB-DC #12;PRELIMZNARY REPORT OH HURRICANE DAISY AWGUST 24-29, 1958 Hurricane "Daisy", intense but small in area, was detected as a tropical storm about 300 miles into a hurricane on August 25. A u g u s t 27 it drifted very slowly northward. coast increased. the Atlantic off

  3. Energy Incentive Programs, Washington DC | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: AlternativeCommunication3-EDepartment ofArizona EnergyHampshire EnergyOregonTexasWashington DC

  4. Using Nyquist or Nyquist-Like Plot to Predict Three Typical Instabilities in DC-DC Converters

    E-Print Network [OSTI]

    Fang, Chung-Chieh

    2012-01-01

    By transforming an exact stability condition, a new Nyquist-like plot is proposed to predict occurrences of three typical instabilities in DC-DC converters. The three instabilities are saddle-node bifurcation (coexistence of multiple solutions), period-doubling bifurcation (subharmonic oscillation), and Neimark bifurcation (quasi-periodic oscillation). In a single plot, it accurately predicts whether an instability occurs and what type the instability is. The plot is equivalent to the Nyquist plot, and it is a useful design tool to avoid these instabilities. Nine examples are used to illustrate the accuracy of this new plot to predict instabilities in the buck or boost converter with fixed or variable switching frequency.

  5. Using Nyquist or Nyquist-Like Plot to Predict Three Typical Instabilities in DC-DC Converters

    E-Print Network [OSTI]

    Chung-Chieh Fang

    2012-04-09

    By transforming an exact stability condition, a new Nyquist-like plot is proposed to predict occurrences of three typical instabilities in DC-DC converters. The three instabilities are saddle-node bifurcation (coexistence of multiple solutions), period-doubling bifurcation (subharmonic oscillation), and Neimark bifurcation (quasi-periodic oscillation). In a single plot, it accurately predicts whether an instability occurs and what type the instability is. The plot is equivalent to the Nyquist plot, and it is a useful design tool to avoid these instabilities. Nine examples are used to illustrate the accuracy of this new plot to predict instabilities in the buck or boost converter with fixed or variable switching frequency.

  6. Multiphase soft switched DC/DC converter and active control technique for fuel cell ripple current elimination

    DOE Patents [OSTI]

    Lai, Jih-Sheng (Blacksburg, VA); Liu, Changrong (Sunnyvale, CA); Ridenour, Amy (Salem, VA)

    2009-04-14

    DC/DC converter has a transformer having primary coils connected to an input side and secondary coils connected to an output side. Each primary coil connects a full-bridge circuit comprising two switches on two legs, the primary coil being connected between the switches on each leg, each full-bridge circuit being connected in parallel wherein each leg is disposed parallel to one another, and the secondary coils connected to a rectifying circuit. An outer loop control circuit that reduces ripple in a voltage reference has a first resistor connected in series with a second resistor connected in series with a first capacitor which are connected in parallel with a second capacitor. An inner loop control circuit that reduces ripple in a current reference has a third resistor connected in series with a fourth resistor connected in series with a third capacitor which are connected in parallel with a fourth capacitor.

  7. Electron trapping by a current vortex F. Bentosela, a;b P. Exner, c;d and V.A. Zagrebnov a;b

    E-Print Network [OSTI]

    simpler example involves a Pauli electron interacting with a flux tube modelling a vortex magnetic fieldElectron trapping by a current vortex F. Bentosela, a;b P. Exner, c;d and V.A. Zagrebnov a;b a with the magnetic field due to an electric current forming a localized rotationally symmetric vortex. We show

  8. Deep Trench Capacitor based Step-up and Step-down DC/DC Converters in 32nm SOI with Opportunistic

    E-Print Network [OSTI]

    Sapatnekar, Sachin

    Deep Trench Capacitor based Step-up and Step-down DC/DC Converters in 32nm SOI with Opportunistic domains. Using ultra-high density deep trench capacitors, we are able to achieve an output power density-power domain scenario by implementing a bi-directional opportunistic current borrowing scheme. Deep trench

  9. Abstract--Emerging high-end portable electronics demand on-chip integration of high-performance dc-dc power supplies not

    E-Print Network [OSTI]

    Rincon-Mora, Gabriel A.

    series resistance (ESR) output capacitors, it is not clear how it applies to boost converters boost converter. Experimental results verified the switching supply was stable across 1-30µH, 1-350µ variation to less than 27%. Index Terms--differential control, boost dc-dc converter I. INTRODUCTION

  10. SoC Energy Savings = Reduce+Reuse+Recycle: A Case Study Using a 660MHz DC-DC Converter with Integrated Output Filter

    E-Print Network [OSTI]

    Lemieux, Guy

    that requires careful planning of the interface between the provider and receptor of the energy. In this paper between energy provider and receptor. Since fully integrated on-chip regulators are usually inefficientSoC Energy Savings = Reduce+Reuse+Recycle: A Case Study Using a 660MHz DC-DC Converter

  11. 2004 35Ih Annual IEEE Power Elearonics Specialisrs Conference Aachen, Germany,2004 Modeling of Quantization Effects in Digitally Controlled DC-DC Converters

    E-Print Network [OSTI]

    Prodiæ, Aleksandar

    : {hpeng,maksimov)@colorado.edu Abstract- In digitally controlled DC-DC converters with a single voltage variations, programmability, reduction or elimination of external passive components, as well a conservative hound for the limit-cycle oscillation amplitude, while Section VI11 summarizes the conclusions. 11

  12. 26.2 Single-Inductor Dual-Input Dual-Output Buck-Boost Fuel Cell-Li Ion Charging DC-DC Converter Supply

    E-Print Network [OSTI]

    Rincon-Mora, Gabriel A.

    1 26.2 Single-Inductor Dual-Input Dual-Output Buck-Boost Fuel Cell-Li Ion Charging DC-DC Converter battery with its energy-dense counterpart like the fuel cell (FC) improves micro-scale integration [2]. As a result, buck or boost single-inductor, dual-input, dual-output (SIDIDO) converters enjoy

  13. Abstract -This paper presents the coordinated control of distributed energy storage systems (DESSs) in DC micro-grids.

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    ) in DC micro-grids. In order to balance the state-of-charge (SoC) of each energy storage unit (ESU--Droop control; distributed energy storage system (DESS); DC micro-grids; state-of-charge (SoC) I. INTRODUCTION and more popularity [1]. Nowadays DC micro-grids are becoming more attractive with the raise of DC power

  14. 650 IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 26, NO. 2, APRIL 2011 Hourly Scheduling of DC Transmission Lines in

    E-Print Network [OSTI]

    Fu, Yong

    ). The impact of VSC-DC transmission system on the economics and the security of integrated ac/dc transmission will determine the optimal hourly schedule of controllable VSC-DC transmission systems in electricity markets;LOTFJOU et al.: HOURLY SCHEDULING OF DC TRANSMISSION LINES 651 , Vector of real and reactive power

  15. 936 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 50, NO. 5, OCTOBER 2003 Gain Adaptation of Networked DC Motor Controllers

    E-Print Network [OSTI]

    Chow, Mo-Yuen

    ) milling machine, dc motors can be connected to controllers, drivers and sensors by directly wiring

  16. Ab initio investigation of intermolecular interactions in solid benzene

    E-Print Network [OSTI]

    O. Bludsky; M. Rubes; P. Soldan

    2008-01-04

    A computational strategy for the evaluation of the crystal lattice constants and cohesive energy of the weakly bound molecular solids is proposed. The strategy is based on the high level ab initio coupled-cluster determination of the pairwise additive contribution to the interaction energy. The zero-point-energy correction and non-additive contributions to the interaction energy are treated using density functional methods. The experimental crystal lattice constants of the solid benzene are reproduced, and the value of 480 meV/molecule is calculated for its cohesive energy.

  17. AB 1007 Full Fuel Cycle Analysis (FFCA) Peer Review

    SciTech Connect (OSTI)

    Rice, D; Armstrong, D; Campbell, C; Lamont, A; Gallegos, G; Stewart, J; Upadhye, R

    2007-01-19

    LLNL is a participant of California's Advanced Energy Pathways (AEP) team funded by DOE (NETL). At the AEP technical review meeting on November 9, 2006. The AB 1007 FFCA team (Appendix A) requested LLNL participate in a peer review of the FFCA reports. The primary contact at the CEC was McKinley Addy. The following reports/presentations were received by LLNL: (1) Full Fuel Cycle Energy and Emissions Assumptions dated September 2006, TIAX; (2) Full Fuel cycle Assessment-Well to Tank Energy Inputs, Emissions, and Water Impacts dated December 2006, TIAX; and (3) Full Fuel Cycle Analysis Assessment dated October 12, 2006, TIAX.

  18. Ab Initio study of neutron drops with chiral Hamiltonians

    E-Print Network [OSTI]

    H. D. Potter; S. Fischer; P. Maris; J. P. Vary; S. Binder; A. Calci; J. Langhammer; R. Roth

    2014-12-20

    We report ab initio calculations for neutron drops in a 10 MeV external harmonic-oscillator trap using chiral nucleon-nucleon plus three-nucleon interactions. We present total binding energies, internal energies, radii and odd-even energy differences for neutron numbers N = 2 - 18 using the no-core shell model with and without importance truncation. Furthermore, we present total binding energies for N = 8, 16, 20, 28, 40, 50 obtained in a coupled-cluster approach. Comparisons with Green's Function Monte Carlo results, where available, using Argonne v8' with three-nucleon interactions reveal important dependences on the chosen Hamiltonian.

  19. MHK Projects/Galena ABS Alaskan | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 JumpCoos Bay OPT WaveFishers IslandShelter IslandABS

  20. MHK Projects/Ruby ABS Alaskan | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 JumpCoos BayOysterReliance Light ProjectRuby ABS

  1. Materials with low DC magnetic susceptibility for sensitive magnetic measurements

    E-Print Network [OSTI]

    Rakshya Khatiwada; Lawrence Dennis; Rachel Kendrick; Marjan Khosravi; Michael Peters; Erick Smith; Mike Snow

    2015-06-30

    Materials with very low DC magnetic susceptibility have many scientific applications. To our knowledge however, relatively little research has been conducted with the goal to produce a totally nonmagnetic material. This phrase in our case means after spatially averaging over macroscopic volumes, it possesses an average zero DC magnetic susceptibility. We report measurements of the DC magnetic susceptibility of three different types of nonmagnetic materials at room temperature: (I) solutions of paramagnetic salts and diamagnetic liquids, (II) liquid gallium-indium alloys and (III) pressed powder mixtures of tungsten and bismuth. The lowest measured magnetic susceptibility among these candidate materials is in the order of 10^-9 cgs volume susceptibility units, about two orders of magnitude smaller than distilled water. In all cases, the measured concentration dependence of the magnetic susceptibility is consistent with that expected for the weighted sum of the susceptibilities of the separate components within experimental error. These results verify the Wiedemann additivity law and thereby realize the ability to produce materials with small but tunable magnetic susceptibility. For our particular scientific application, we are also looking for materials with the largest possible number of neutrons and protons per unit volume. The gallium-indium alloys fabricated and measured in this work possess to our knowledge the smallest ratio of volume magnetic susceptibility to nucleon number density per unit volume for a room temperature liquid, and the tungsten-bismuth pressed powder mixtures possess to our knowledge the smallest ratio of volume magnetic susceptibility to nucleon number density per unit volume for a room temperature solid. This ratio is a figure of merit for a certain class of precision experiments that search for possible exotic spin-dependent forces of Nature.

  2. Positron lifetime spectrometer using a DC positron beam

    DOE Patents [OSTI]

    Xu, Jun; Moxom, Jeremy

    2003-10-21

    An entrance grid is positioned in the incident beam path of a DC beam positron lifetime spectrometer. The electrical potential difference between the sample and the entrance grid provides simultaneous acceleration of both the primary positrons and the secondary electrons. The result is a reduction in the time spread induced by the energy distribution of the secondary electrons. In addition, the sample, sample holder, entrance grid, and entrance face of the multichannel plate electron detector assembly are made parallel to each other, and are arranged at a tilt angle to the axis of the positron beam to effectively separate the path of the secondary electrons from the path of the incident positrons.

  3. Hardwired Control Changes For NSTX DC Power Feeds

    SciTech Connect (OSTI)

    Ramakrishnan, S.

    2013-06-28

    The National Spherical Torus Experiment (NSTX) has been designed and installed in the existing facilities at Princeton Plasma Physics Laboratory (PPPL). Most of the hardware, plant facilities, auxiliary sub-systems, and power systems originally used for the Tokamak Fusion Test Reactor (TFTR) have been used with suitable modifications to reflect NSTX needs. The original TFTR Hardwired Control System (HCS) with electromechanical relays was used for NSTX DC Power loop control and protection during NSTX operations. As part of the NSTX Upgrade, the HCS is being changed to a PLC-based system with the same control logic. This paper gives a description of the changeover to the new PLC-based system __________________________________________________

  4. Heteroepitaxial Ge-on-Si by DC magnetron sputtering

    SciTech Connect (OSTI)

    Steglich, Martin; Schrempel, Frank; Füchsel, Kevin; Kley, Ernst-Bernhard; Patzig, Christian; Berthold, Lutz; Höche, Thomas; Tünnermann, Andreas; Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Str. 7, 07745 Jena

    2013-07-15

    The growth of Ge on Si(100) by DC Magnetron Sputtering at various temperatures is studied by Spectroscopic Ellipsometry and Transmission Electron Microscopy. Smooth heteroepitaxial Ge films are prepared at relatively low temperatures of 380°C. Typical Stransky-Krastanov growth is observed at 410°C. At lower temperatures (320°C), films are essentially amorphous with isolated nanocrystallites at the Si-Ge interface. A minor oxygen contamination at the interface, developing after ex-situ oxide removal, is not seen to hinder epitaxy. Compensation of dislocation-induced acceptors in Ge by sputtering from n-doped targets is proposed.

  5. EA-327-A DC Energy, LLC | Department of Energy

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPL EnergyPlus, LLC to export electricSilverhill Ltdto export electricDC

  6. EA-351 DC Energy Dakota, LLC | Department of Energy

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPL EnergyPlus, LLC to export electricSilverhillSaracenCreditNextEraDC

  7. EA-377 DC Energy Texas | Department of Energy

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPL EnergyPlus, LLC to exportEndure Energy,Vitol Inc toDC Energy Texas to

  8. Category:DC Resistivity Survey (Wenner Array) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmentalBowerbank,Cammack Village,8199089°,AnalyticalCuttings Analysis JumpDC Resistivity

  9. Global DC Power System Market Analysis | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History View New Pages RecentPlant <SilverChange Associates JumpGlobal DC Power

  10. DC Resistivity Survey (Dipole-Dipole Array) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePower VenturesInformation9) Wind Farm JumpAlum|Cyclone PowerD1DC

  11. Categorical Exclusion Determinations: Washington, D.C. | Department of

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a lCaribElectricSouth Dakota. DOCUMENTSEnergy Washington, D.C.

  12. Ab Initio Thermodynamic Model for Magnesium Carbonates and Hydrates

    SciTech Connect (OSTI)

    Chaka, Anne M.; Felmy, Andrew R.

    2014-03-28

    An ab initio thermodynamic framework for predicting properties of hydrated magnesium carbonate minerals has been developed using density-functional theory linked to macroscopic thermodynamics through the experimental chemical potentials for MgO, water, and CO2. Including semiempirical dispersion via the Grimme method and small corrections to the generalized gradient approximation of Perdew, Burke, and Ernzerhof for the heat of formation yields a model with quantitative agreement for the benchmark minerals brucite, magnesite, nesquehonite, and hydromagnesite. The model shows how small differences in experimental conditions determine whether nesquehonite, hydromagnesite, or magnesite is the result of laboratory synthesis from carbonation of brucite, and what transformations are expected to occur on geological time scales. Because of the reliance on parameter-free first principles methods, the model is reliably extensible to experimental conditions not readily accessible to experiment and to any mineral composition for which the structure is known or can be hypothesized, including structures containing defects, substitutions, or transitional structures during solid state transformations induced by temperature changes or processes such as water, CO2, or O2 diffusion. Demonstrated applications of the ab initio thermodynamic framework include an independent means to evaluate differences in thermodynamic data for lansfordite, predicting the properties of Mg analogs of Ca-based hydrated carbonates monohydrocalcite and ikaite which have not been observed in nature, and an estimation of the thermodynamics of barringtonite from the stoichiometry and a single experimental observation.

  13. Single-mode deformation via nanoindentation in dc-Si

    SciTech Connect (OSTI)

    Wong, Sherman; Haberl, Bianca; Williams, James S.; Bradby, Jodie E.

    2015-01-01

    The mixture of the metastable body-centered cubic (bc8) and rhombohedral (r8) phases of silicon that is formed via nanoindentation of diamond cubic (dc) silicon exhibits properties that are of scientifc and technological interest. This letter demonstrates that large regions of this mixed phase can be formed in crystalline Si via nanoindentation without signifcant damage to the surrounding crystal. Cross-sectional transmission electron microscopy is used to show that volumes 6 um wide and up to 650 nm deep can be generated in this way using a spherical tip of 21.5 um diameter. The phase transformed region is characterised using both Raman microspectroscopy and transmission electron microscopy. It is found that uniform loading using large spherical indenters can favor phase transformation as the sole deformation mechanism as long as the maximum load is below a critical level. We suggest that the sluggish nature of the transformation from the dc-Si phase to the metallic (b-Sn) phase normally results in competing deformation mechanisms such as slip and cracking but these can be suppressed by controlled loading conditions.

  14. DC switching regulated power supply for driving an inductive load

    DOE Patents [OSTI]

    Dyer, G.R.

    1983-11-29

    A dc switching regulated power supply for driving an inductive load is provided. The regulator basic circuit is a bridge arrangement of diodes and transistors. First and second opposite legs of the bridge are formed by first and second parallel-connected transistor arrays, respectively, while the third and fourth legs of the bridge are formed by appropriately connected first and second parallel connected diode arrays, respectively. A dc power supply is connected to the input of the bridge and the output is connected to the load. A servo controller is provided to control the switching rate of the transistors to maintain a desired current to the load. The regulator may be operated in three stages or modes: (1) for current runup in the load, both first and second transistor switch arrays are turned on and current is supplied to the load through both transistor arrays. (2) When load current reaches the desired level, the first switch is turned off, and load current flywheels through the second switch array and the fourth leg diode array connecting the second switch array in series with the load. Current is maintained by alternating between modes 1 and 2 at a suitable duty cycle and switching rate set by the controller. (3) Rapid current rundown is accomplished by turning both switch arrays off, allowing load current to be dumped back into the source through the third and fourth diode arrays connecting the source in series opposition with the load to recover energy from the inductive load.

  15. Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    ballast fluorescent and LED lighting, which are DC- internalmotors [7]. Fluorescent and LED lighting uses one-quarter ofbest technology Lighting Incandescent, fluorescent, LED

  16. Harnessing the Power of the Sun, Solar Impulse Plane Lands in DC Area

    Office of Energy Efficiency and Renewable Energy (EERE)

    Today, Secretary Moniz spoke at an event welcoming the arrival of the solar-powered Solar Impulse plane at Dulles International Airport near Washington, D.C.

  17. Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01

    motors [7]. Fluorescent and LED lighting uses one-quarter ofballast fluorescent and LED lighting, which are DC- internalbest technology Lighting Incandescent, fluorescent, LED

  18. DC Resistivity Survey (Dipole-Dipole Array) At Mt Princeton Hot...

    Open Energy Info (EERE)

    1971) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: DC Resistivity Survey (Dipole-Dipole Array) At Mt Princeton Hot Springs Geothermal Area...

  19. Optimization of spin-torque switching using AC and DC pulses

    SciTech Connect (OSTI)

    Dunn, Tom [Department of Physics, University of Minnesota, Minneapolis, Minnesota 55455 (United States); Kamenev, Alex [Department of Physics, University of Minnesota, Minneapolis, Minnesota 55455 (United States); Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

    2014-06-21

    We explore spin-torque induced magnetic reversal in magnetic tunnel junctions using combined AC and DC spin-current pulses. We calculate the optimal pulse times and current strengths for both AC and DC pulses as well as the optimal AC signal frequency, needed to minimize the Joule heat lost during the switching process. The results of this optimization are compared against numeric simulations. Finally, we show how this optimization leads to different dynamic regimes, where switching is optimized by either a purely AC or DC spin-current, or a combination AC/DC spin-current, depending on the anisotropy energies and the spin-current polarization.

  20. SECONDARY MINERALS FOUND IN CORES DC2 Al AND DC2 TAKEN FROM THE GRANDE RONDE BASALT FORMATION, PASCO BASIN, WASHINGTON

    E-Print Network [OSTI]

    Teague, L.S.

    2010-01-01

    of secondary and primary mineral phases in basalts of theB. , 1975. Perched silia minerals on mordenite fibers. Jour.lt;. UC—70 I SECONDARY MINERALS FOUND IN CORES DC2 AI AND

  1. AUTOMATIC MAPPING FROM ULTRA-LIGHT UAV IMAGERY Christoph Strecha a,b

    E-Print Network [OSTI]

    Fua, Pascal

    AUTOMATIC MAPPING FROM ULTRA-LIGHT UAV IMAGERY Christoph Strecha a,b , Olivier Küng a,b and Pascal.kueng@pix4d.com) KEY WORDS: UAV, mapping, ortho-image, DSM, Structure and Motion ABSTRACT: This paper presents an affordable, fully automated and accurate mapping solutions based on ultra-light UAV imagery

  2. New Aperture and PSF Photometry QSO 0957+561A,B

    E-Print Network [OSTI]

    Ovaldsen, Jan-Erik

    New Aperture and PSF Photometry of QSO 0957+561A,B Application to Time Delay and Microlensing Aperture and PSF Photometry of QSO 0957+561A,B", is distributed under the terms of the Public Library was initiated with the aim of developing a photometry program to reduce the CCD frames. The results were

  3. Low-voltage, low-power, low switching error, class-AB switched current

    E-Print Network [OSTI]

    Serdijn, Wouter A.

    Low-voltage, low-power, low switching error, class-AB switched current memory cell C. Sawigun and W into two components by a low-voltage class-AB current splitter and subsequently processes the individual signals by two low switching error class-A memory cells. As a conse- quence, the output current obtained

  4. Adaptation of hybrid five-phase ABS algorithms for experimental validation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -lock braking, Hybrid control systems, Limit cycle analysis, Experimental validation, Quarter-car. 1Adaptation of hybrid five-phase ABS algorithms for experimental validation Mathieu Gerard WilliamAnti-lock Braking System (ABS) is the most important active safety system for passenger cars, but unfortunately

  5. An Occupied Subspace Optimization for Linear Scaling in LargeScale Ab Initio Electronic

    E-Print Network [OSTI]

    Raczkowski, David

    1 CONTENTS An Occupied Subspace Optimization for Linear Scaling in Large­Scale Ab Initio Electronic 2000 Physics An Occupied Subspace Optimization for Linear Scaling in Large Scale Ab Initio Electronic Structure Calculations Abstract We present an approach to electronic structure calcu­ lations that replaces

  6. Data Mining Approach to Ab-Initio Prediction of Crystal Structure Dane Morgan, Gerbrand Ceder

    E-Print Network [OSTI]

    Curtarolo, Stefano

    Data Mining Approach to Ab-Initio Prediction of Crystal Structure Dane Morgan, Gerbrand Ceder of possible structures for new alloys. Here we describe ongoing work on a novel method (Data Mining of Quantum Calculations, or DMQC) that applies data mining techniques to existing ab initio data in order to increase

  7. Embedding parameters in ab initio theory to develop well-controlled approximations based on molecular similarity

    E-Print Network [OSTI]

    Yaron, David

    Embedding parameters in ab initio theory to develop well- controlled approximations based Journal of Chemical Theory and Computation #12;1 Embedding parameters in ab initio theory to develop well-controlled on molecular similarity Journal: Journal of Chemical Theory and Computation Manuscript ID: Draft Manuscript

  8. Input Substitution and Business Energy Consumption: Evidence from ABS Energy Survey Data

    E-Print Network [OSTI]

    1 Input Substitution and Business Energy Consumption: Evidence from ABS Energy Survey Data Kay Cao applies the system of equations approach to energy consumption modelling using the ABS 2008-09 Energy of equations, energy consumption modelling, elasticity of substitution JEL codes: C51, D24 * Please do

  9. Engine with hydraulic fuel injection and ABS circuit using a single high pressure pump

    DOE Patents [OSTI]

    Bartley, Bradley E. (Manito, IL); Blass, James R. (Bloomington, IL); Gibson, Dennis H. (Chillicothe, IL)

    2001-01-01

    An engine system comprises a hydraulically actuated fuel injection system and an ABS circuit connected via a fluid flow passage that provides hydraulic fluid to both the fuel injection system and to the ABS circuit. The hydraulically actuated system includes a high pressure pump. The fluid control passage is in fluid communication with an outlet from the high pressure pump.

  10. SUPPLEMENTARY MATERIAL Global ab initio ground-state potential energy surface of N4

    E-Print Network [OSTI]

    Truhlar, Donald G

    . Date of final revision of this supplementary material: Feb. 7, 2014 Table of contents, supplementary energy function S-4 Figures S1-S8 S-6 Fortran conversion subroutine, internal coordinates to Cartesian coordinates S-14 N4 ab initio data set, internal coordinates S-17 N4 ab initio data set, Cartesian coordinates

  11. ASTR. 403/Phys. 402 -Syllabus Spring 2013 Instructors: Bruce Draine [BTD], Adam Burrows [AB

    E-Print Network [OSTI]

    Draine, Bruce T.

    : Gravity, Magnetic Fields, and Turbulence 6 H BTD Star Formation: Angular Momentum Problem; Magnetic Flux Problem 11 BTD Star Formation: Protostellar Classes and Star Formation Rates 13, Wednesday MID-TERM EXAM Transfer, and Convection 8 AB Scaling Relations and Polytropes 10 H AB Nuclear Masses, Fusion Reactions

  12. A nanocontainer for the storage of hydrogen , X. Gu a,b

    E-Print Network [OSTI]

    Gong, Xingao

    A nanocontainer for the storage of hydrogen X. Ye a,b , X. Gu a,b , X.G. Gong b , Tony K.M. Shing than the typical pressure of a few hundred bar currently employed for hydrogen storage. At 2.5 GPa. Introduction Storage of hydrogen is a crucial link between hydrogen production and its use as a clean fuel

  13. Assessing the Thermoelectric Properties of Sintered Compounds via High-Throughput Ab-Initio Calculations

    E-Print Network [OSTI]

    Curtarolo, Stefano

    Assessing the Thermoelectric Properties of Sintered Compounds via High-Throughput Ab Database have been considered as nanograined, sintered-powder thermoelectrics with the high-throughput ab the electronic band gap and the carrier effective mass, and that the probability of having large thermoelectric

  14. Diode laser welding of ABS: Experiments and process modeling

    E-Print Network [OSTI]

    Ilie, Mariana; Mattei, Simone; Cicala, Eugen; Stoica, Virgil; 10.1016/j.optlastec.2008.10.005

    2010-01-01

    The laser beam weldability of acrylonitrile/butadiene/styrene (ABS) plates is determined by combining both experimental and theoretical aspects. In modeling the process, an optical model is used to determine how the laser beam is attenuated by the first material and to obtain the laser beam profile at the interface. Using this information as the input data to a thermal model, the evolution of the temperature field within the two components can be estimated. The thermal model is based on the first principles of heat transfer and utilizes the temperature variation laws of material properties. Corroborating the numerical results with the experimental results, some important insights concerning the fundamental phenomena that govern the process could be extracted. This approach proved to be an efficient tool in determining the weldability of polimeric materials and assures a significant reduction of time and costs with the experimental exploration.

  15. A Review on Ab Initio Approaches for Multielectron Dynamics

    E-Print Network [OSTI]

    Ishikawa, Kenichi L

    2015-01-01

    In parallel with the evolution of femtosecond and attosecond laser as well as free-electron laser technology, a variety of theoretical methods have been developed to describe the behavior of atoms, molecules, clusters, and solids under the action of those laser pulses. Here we review major ab initio wave-function-based numerical approaches to simulate multielectron dynamics in atoms and molecules driven by intense long-wavelength and/or ultrashort short-wavelength laser pulses. Direct solution of the time-dependent Schr\\"odinger equation (TDSE), though its applicability is limited to He, ${\\rm H}_2$, and Li, can provide an exact description and has been greatly contributing to the understanding of dynamical electron-electron correlation. Multiconfiguration self-consistent-field (MCSCF) approach offers a flexible framework from which a variety of methods can be derived to treat both atoms and molecules, with possibility to systematically control the accuracy. The equations of motion of configuration interactio...

  16. Non-stoichiometric AB5 alloys for metal hydride electrodes

    DOE Patents [OSTI]

    Reilly, James J. (Bellport, NY); Adzic, Gordana D. (Setauket, NY); Johnson, John R. (Calverton, NY); Vogt, Thomas (Cold Spring Harbor, NY); McBreen, James (Bellport, NY)

    2001-01-01

    The present invention provides a non-stoichiometric alloy comprising a composition having the formula AB.sub.5+X an atomic ratio wherein A is selected from the group consisting of the rare earth metals, yttrium, mischmetal, or a combination thereof; B is nickel and tin, or nickel and tin and at least a third element selected from the group consisting of the elements in group IVA of the periodic table, aluminum, manganese, iron, cobalt, copper, antimony or a combination thereof; X is greater than 0 and less than or equal to about 2.0; and wherein at least one substituted A site is occupied by at least one of the B elements. An electrode incorporating said alloy and an electrochemical cell incorporating said electrode are also described.

  17. Local Structure Analysis in $Ab$ $Initio$ Liquid Water

    E-Print Network [OSTI]

    Santra, Biswajit; Martelli, Fausto; Car, Roberto

    2015-01-01

    Within the framework of density functional theory, the inclusion of exact exchange and non-local van der Waals/dispersion (vdW) interactions is crucial for predicting a microscopic structure of ambient liquid water that quantitatively agrees with experiment. In this work, we have used the local structure index (LSI) order parameter to analyze the local structure in such highly accurate $ab$ $initio$ liquid water. At ambient conditions, the LSI probability distribution, P($I$), was unimodal with most water molecules characterized by more disordered high-density-like local environments. With thermal excitations removed, the resultant bimodal P($I$) in the inherent potential energy surface (IPES) exhibited a 3:1 ratio between high- and low-density-like molecules, with the latter forming small connected clusters amid the predominant population. By considering the spatial correlations and hydrogen bond network topologies $among$ water molecules with the same LSI identities, we demonstrate that the signatures of th...

  18. Discharging a DC bus capacitor of an electrical converter system

    DOE Patents [OSTI]

    Kajouke, Lateef A; Perisic, Milun; Ransom, Ray M

    2014-10-14

    A system and method of discharging a bus capacitor of a bidirectional matrix converter of a vehicle are presented here. The method begins by electrically shorting the AC interface of the converter after an AC energy source is disconnected from the AC interface. The method continues by arranging a plurality of switching elements of a second energy conversion module into a discharge configuration to establish an electrical current path from a first terminal of an isolation module, through an inductive element, and to a second terminal of the isolation module. The method also modulates a plurality of switching elements of a first energy conversion module, while maintaining the discharge configuration of the second energy conversion module, to at least partially discharge a DC bus capacitor.

  19. Thermal cum DC Camouflage in Duet with Undecorated Natural Materials

    E-Print Network [OSTI]

    Yang, Tian-Zhi; Gao, Dongliang; Wu, Linzhi; Li, Baowen; Thong, John T L; Qiu, Cheng-Wei

    2015-01-01

    To manipulate various types of physical signals in one single device has long captivated the attention of scientists and engineers. This however is very challenging, if not impossible, even for emerging metamaterials. Up to date, many artificial materials have been proposed, theoretically and (or) experimentally, for manipulating various waves/signals on a one-function-one-device basis. In this work, for the very first time, we employ undecorated natural materials to experimentally demonstrate a simultaneous camouflage for thermal current and electric dc current on the same device. It demonstrates how ingenuity can overcome the limitations of natural material systems without the need for complex decoration to impart inhomogeneous and (or) anisotropic properties, which was previously considered impossible to accomplish except by using metamaterials.

  20. FLUXCAP: A flux-coupled ac/dc magnetizing device

    E-Print Network [OSTI]

    Gopman, Daniel B; Kent, Andrew D

    2012-01-01

    We report on an instrument for applying ac and dc magnetic fields by capturing the flux from a rotating permanent magnet and projecting it between two adjustable pole pieces. This can be an alternative to standard electromagnets for experiments with small samples or in probe stations in which an applied magnetic field is needed locally, with advantages that include a compact form-factor, very low power requirements and dissipation as well as fast field sweep rates. This flux capture instrument (FLUXCAP) can produce fields from -400 to +400 mT, with field resolution less than 1 mT. It generates static magnetic fields as well as ramped fields, with ramping rates as high as 10 T/s. We demonstrate the use of this apparatus for studying the magnetotransport properties of spin-valve nanopillars, a nanoscale device that exhibits giant magnetoresistance.

  1. Superconducting DC and RF Properties of Ingot Niobium

    SciTech Connect (OSTI)

    Pashupati Dhakal, Gianluigi Ciovati, Peter Kneisel, Ganapati Rao Myneni

    2011-07-01

    The thermal conductivity, DC magnetization and penetration depth of large-grain niobium hollow cylindrical rods fabricated from ingots, manufactured by CBMM subjected to chemical and heat treatment were measured. The results confirm the influence of chemical and heat-treatment processes on the superconducting properties, with no significant dependence on the impurity concentrations in the original ingots. Furthermore, RF properties, such as the surface resistance and quench field of the niobium rods were measured using a TE{sub 011} cavity. The hollow niobium rod is the center conductor of this cavity, converting it to a coaxial cavity. The quench field is limited by the critical heat flux through the rods' cooling channel.

  2. Possible temperature control DC switch effect between two superconductors

    E-Print Network [OSTI]

    Tian De Cao

    2011-08-11

    The lifetime of an electron pair could not be unlimited long, on the basis of this, we suggest a model. The model means that the movements of charge carriers in a superconductor should have three forms: the single-electron movement, the single-pair movement, and the revolving around the mass center of two electrons in a pair. Thus the current in a superconductor has three possible parts. Similarly, there should be three possible effects in a SIS junction: the tunneling of single electron, the tunneling of single pair, and the pair-forming following the pair-breaking. This paper will discuss these problems and present a possible temperature control DC switch effect between two superconductors.

  3. Multi-terminal Subsystem Model Validation for Pacific DC Intertie

    SciTech Connect (OSTI)

    Yang, Bo; Huang, Zhenyu; Kosterev, Dmitry

    2008-07-20

    this paper proposes to validate dynamic model of Pacific DC Intertie with the concept of hybrid simulation by combing simulation with PMU measurements. The Playback function available in GE PSLF is adopted for hybrid simulation. It is demonstrated for the first time the feasibility of using Playback function on multi-terminal subsystem. Sensitivity studies are also presented as a result of common PMU measurement quality problem, ie, offset noise and time synchronization. Results indicate a good tolerance of PDCI model generally. It is recommended that requirements should apply to phasor measurements in model validation work to ensure better analysis. Key parameters are identified based on impact of value change to model behavior. Two events are employed for preliminary model validation with PMU measurements. Suggestions are made for PDCI model validation work in the future.

  4. Effect of DC voltage pulses on memristor behavior.

    SciTech Connect (OSTI)

    Evans, Brian R.

    2013-10-01

    Current knowledge of memristor behavior is limited to a few physical models of which little comprehensive data collection has taken place. The purpose of this research is to collect data in search of exploitable memristor behavior by designing and implementing tests on a HP Labs Rev2 Memristor Test Board. The results are then graphed in their optimal format for conceptualizing behavioral patterns. This series of experiments has concluded the existence of an additional memristor state affecting the behavior of memristors when pulsed with positively polarized DC voltages. This effect has been observed across multiple memristors and data sets. The following pages outline the process that led to the hypothetical existence and eventual proof of this additional state of memristor behavior.

  5. Auxiliary quasi-resonant dc tank electrical power converter

    DOE Patents [OSTI]

    Peng, Fang Z.

    2006-10-24

    An auxiliary quasi-resonant dc tank (AQRDCT) power converter with fast current charging, voltage balancing (or charging), and voltage clamping circuits is provided for achieving soft-switched power conversion. The present invention is an improvement of the invention taught in U.S. Pat. No. 6,111,770, herein incorporated by reference. The present invention provides faster current charging to the resonant inductor, thus minimizing delay time of the pulse width modulation (PWM) due to the soft-switching process. The new AQRDCT converter includes three tank capacitors or power supplies to achieve the faster current charging and minimize the soft-switching time delay. The new AQRDCT converter further includes a voltage balancing circuit to charge and discharge the three tank capacitors so that additional isolated power supplies from the utility line are not needed. A voltage clamping circuit is also included for clamping voltage surge due to the reverse recovery of diodes.

  6. Materials with low DC magnetic susceptibility for sensitive magnetic measurements R. Khatiwada,1, 2, 3,

    E-Print Network [OSTI]

    Materials with low DC magnetic susceptibility for sensitive magnetic measurements R. Khatiwada,1, 2 (Dated: July 1, 2015) Materials with very low DC magnetic susceptibility have many scientific a totally nonmagnetic material. This phrase in our case means after spatially averaging over macroscopic

  7. Nonlinear Dust Acoustic Waves, Shocks and Stationary Structures in a DC Glow Discharge Dusty Plasma

    E-Print Network [OSTI]

    Merlino, Robert L.

    Nonlinear Dust Acoustic Waves, Shocks and Stationary Structures in a DC Glow Discharge Dusty Plasma drifting dusty plasmas and temporal dust acoustic wave growth Phys. Plasmas 18, 113706 (2011) Modulational;Nonlinear Dust Acoustic Waves, Shocks and Stationary Structures in a DC Glow Discharge Dusty Plasma Robert L

  8. DC WRRC Report No. 178 AN EXPERIMENTAL STUDY OF THE OPTIMAL THICKNESS OF A SAND

    E-Print Network [OSTI]

    District of Columbia, University of the

    FILTER WATER QUALITY STRUCTURE July 1994 D.C. Water Resources Research Center University of the District OF THE OPTIMAL THICKNESS OF A SAND LAYER IN A SAND FILTER WATER QUALITY STRUCTURE Submitted by: Farshad Amini THICKNESS OF A SAND LAYER IN A SAND FILTER WATER QUALITY STRUCTURE July 1994 D.C. Water Resources Research

  9. EE443L: Intermediate Control Lab Lab2: Modeling a DC motor

    E-Print Network [OSTI]

    Wedeward, Kevin

    EE443L: Intermediate Control Lab Lab2: Modeling a DC motor Introduction: In this lab we will develop and validate a basic model of a permanent magnet DC motor (Yaskawa Electric, Mini-series, Minertia motor). The specific input/output relationship, which we are interested in determining, is the manner

  10. www.sciencemag.org/cgi/content/full/342/6155/224/DC1 Supplementary Materials for

    E-Print Network [OSTI]

    McEuen, Paul L.

    www.sciencemag.org/cgi/content/full/342/6155/224/DC1 Supplementary Materials for Imaging Atomic the following: (available at www.sciencemag.org/cgi/content/full/342/6155/224/DC1) Movies S1 to S5 #12;2 Materials and Methods Transmission electron microscopy (TEM )Imaging Transmission electron microscopy (TEM

  11. Aalborg Universitet Intelligent DC Microgrid Living Laboratories -A Chinese-Danish Project

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Intelligent DC Microgrid Living Laboratories - A Chinese-Danish Project Diaz Microgrid Living Laboratories - A Chinese-Danish Project. In IEEE ICDCM 2015. IEEE Press. General rights.aau.dk on: juli 07, 2015 #12;Intelligent DC Microgrid Living Laboratories - A Chinese-Danish Project Enrique

  12. A Scalable DC Microgrid Architecture for Rural Electrification in Emerging Regions

    E-Print Network [OSTI]

    Sanders, Seth

    A Scalable DC Microgrid Architecture for Rural Electrification in Emerging Regions P. Achintya the design and experimental validation of a scalable dc microgrid architecture for rural electrification. The microgrid design has been driven by field data collected from Kenya and India. The salient features

  13. Aalborg Universitet Distributed Consensus-Based Control of Multiple DC-Microgrids Clusters

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Distributed Consensus-Based Control of Multiple DC-Microgrids Clusters Shafiee). Distributed Consensus-Based Control of Multiple DC-Microgrids Clusters. In Proceedings of the 40th Annual.aau.dk on: juli 05, 2015 #12;This document downloaded from www.microgrids.et.aau.dk is a preprint

  14. Zeroing Transformer's DC Current in Resonant Converters with No Series Capacitors

    E-Print Network [OSTI]

    Gertsman, Student Member, IEEE and Sam Ben-Yaakov ,Fellow, IEEE Power Electronics Laboratory Department: www.ee.bgu.ac.il/~pel Abstract - DC current unbalance in the windings of a transformer may initiate the transformer's DC current to zero by correcting the asymmetry of the drive. This balancing control

  15. Aalborg Universitet Distributed Bus Signaling Control for a DC Charging Station with Multi Paralleled

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    been reported in order to verify the validity of proposed approach. Keywords--EV charging; flywheelAalborg Universitet Distributed Bus Signaling Control for a DC Charging Station with Multi., & Savaghebi, M. (2015). Distributed Bus Signaling Control for a DC Charging Station with Multi Paralleled

  16. Genomic Plasticity Enables Phenotypic Variation of Pseudomonas syringae pv. tomato DC3000

    E-Print Network [OSTI]

    Myers, Chris

    Genomic Plasticity Enables Phenotypic Variation of Pseudomonas syringae pv. tomato DC3000 Zhongmeng of a genomic anomaly in the region of 4.7 to 4.9 Mb of the Pseudomonas syringae pv. tomato (Pst) DC3000 genome in P. syringae. Citation: Bao Z, Stodghill PV, Myers CR, Lam H, Wei H-L, et al. (2014) Genomic

  17. The Data Center (DC) Genome project is a collaborative effort with Microsoft Research

    E-Print Network [OSTI]

    Amir, Yair

    DC Genome The Data Center (DC) Genome project is a collaborative effort with Microsoft Research the efficiency of data center operations and thus minimize their environmental impact. Data center energy about carbon footprints and climate change. Lack of visibility into the data center's operating

  18. DC Discharge Studies Using PIC-MCC Jeff Hammel and John Verboncoeur

    E-Print Network [OSTI]

    Wurtele, Jonathan

    DC Discharge Studies Using PIC-MCC Jeff Hammel and John Verboncoeur March 31, 2004 1 Introduction (PIC-MCC) method. PIC-MCC is used to accurately model kinetic processes present in DC discharges PIC. Cross-validation of PIC-MCC simulation and analysis may be used to improved both computational

  19. D.C. Community Comes Together in the Name of Sustainability, Affordability

    Broader source: Energy.gov [DOE]

    The New School for Design and Stevens Institute of Technology 2011 Solar Decathlon team is partnering with D.C. community members and Habitat for Humanity to build an energy efficient home that will be moved to the Deanwood neighborhood of Washington, D.C. following the competition.

  20. Reid Rosnick/DC/USEPA/US 10/25/2012 11:54 AM

    E-Print Network [OSTI]

    Management and Regulations Washington, DC phone: 202-343-9186 email: egidi.philip@epa.gov cell: 970 Washington, DC phone: 202-343-9186 email: egidi.philip@epa.gov cell: 970-209-2885 Reid Rosnick---10! ------------------------------------------------------------------------------------------------------ -------- Reid J. Rosnick Radiation Protection Division (6608J) U.S. Environmental Protection Agency 1200

  1. Parametric Study of PV Arc-Fault Generation Methods and Analysis of Conducted DC Spectrum

    E-Print Network [OSTI]

    Parametric Study of PV Arc-Fault Generation Methods and Analysis of Conducted DC Spectrum Jay photovoltaic (PV) direct current (DC) arc- fault detectors use the frequency content of the PV system to detect by different PV arcs in the field. In this investigation, we (a) discuss the differences in establishing

  2. Mass-related inversion symmetry breaking and phonon self-energy renormalization in isotopically labeled AB-stacked bilayer graphene

    E-Print Network [OSTI]

    Araujo, Paulo Antonio Trinidade

    A mass-related symmetry breaking in isotopically labeled bilayer graphene (2LG) was investigated during in-situ electrochemical charging of AB stacked (AB-2LG) and turbostratic (t-2LG) layers. The overlap of the two ...

  3. E85, Flex-Fuel Vehicles, and AB 1493 Integrating biofuels into California's vehicular greenhouse gas regulations

    E-Print Network [OSTI]

    Kammen, Daniel M.

    E85, Flex-Fuel Vehicles, and AB 1493 Integrating biofuels into California's vehicular greenhouse.................................................................................................. 5 1.1.3 CALIFORNIA CLEAN FUELS PROGRAM ....................................... 6 1.1.5 AB 1007: THE ALTERNATIVE FUELS PLAN

  4. Adaptive Selective Harmonic Minimization Based on ANNs for Cascade Multilevel Inverters With Varying DC Sources

    SciTech Connect (OSTI)

    Filho, Faete [ORNL; Maia, Helder Z [UFMS, Department of Electrical Engineering; Mateus, Tiago Henrique D [ORNL; Ozpineci, Burak [ORNL; Tolbert, Leon M [ORNL; Pinto, Joao Onofre P [ORNL

    2013-01-01

    A new approach for modulation of an 11-level cascade multilevel inverter using selective harmonic elimination is presented in this paper. The dc sources feeding the multilevel inverter are considered to be varying in time, and the switching angles are adapted to the dc source variation. This method uses genetic algorithms to obtain switching angles offline for different dc source values. Then, artificial neural networks are used to determine the switching angles that correspond to the real-time values of the dc sources for each phase. This implies that each one of the dc sources of this topology can have different values at any time, but the output fundamental voltage will stay constant and the harmonic content will still meet the specifications. The modulating switching angles are updated at each cycle of the output fundamental voltage. This paper gives details on the method in addition to simulation and experimental results.

  5. Narrating Washington, D.C. from the Margins: Urban Space and Cultural Identity in "Lost in the City" and "The Beautiful Things that Heaven Bears"

    E-Print Network [OSTI]

    Brown, Jessica M

    2011-01-01

    and Urban Space in Washington, D.C. Chicago: University ofBrookings Institution. Washington, D.C. Gillette, Howard Jr.of Urban Policy in Washington, D.C. (2006). Baltimore: The

  6. Proceedings of WindPower 95, AWEA, Washington, D.C., 1995. FATIGUE DAMAGE ESTIMATE COMPARISONS FOR

    E-Print Network [OSTI]

    Proceedings of WindPower 95, AWEA, Washington, D.C., 1995. FATIGUE DAMAGE ESTIMATE COMPARISONS," Proceedings of WindPower `95, AWEA, Washington, DC, March, 1995, pp. 177-186. * This work is supported

  7. Insertion sequence 5 at various upstream locations of the flhDC operon causes Escherichia coli hyper motility

    E-Print Network [OSTI]

    Wang, Jing

    2010-01-01

    locations of the flhDC operon causes Escherichia coli Hyperlocations of the PflhDC operon causes Escherichia coli Hyperof the transposing segment causes the formation of co-

  8. D:\\Ms_thesis\\TTS Master's thesis -Optimization.docx Page 1 of 1 TTS Marine AB

    E-Print Network [OSTI]

    Svenningsson, Josef

    D:\\Ms_thesis\\TTS Master's thesis - Optimization.docx Page 1 of 1 TTS Marine AB Tel: +46 31 725 79 Carlsson From: Hamed Shakib Date: 19 January 2015 Subject: Thesis work at TTS Marine AB Pages: 1 The portfolio of TTS Marine AB located in Gothenburg, Sweden encompasses the design and manufacture of Ro

  9. Ab Cats Alg Geom Moduli Derived Cats Triangulated Cats And Back Again Triangulated Categories in Algebraic Geometry

    E-Print Network [OSTI]

    Ghani, Neil

    Ab Cats Alg Geom Moduli Derived Cats Triangulated Cats And Back Again Triangulated Categories in Algebraic Geometry Antony Maciocia May 21, 2010 #12;Ab Cats Alg Geom Moduli Derived Cats Triangulated Cats And Back Again Outline Abelian Categories #12;Ab Cats Alg Geom Moduli Derived Cats Triangulated Cats

  10. 1620 IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 27, NO. 3, JULY 2012 Hybrid AC/DC Transmission Expansion Planning

    E-Print Network [OSTI]

    Fu, Yong

    1620 IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 27, NO. 3, JULY 2012 Hybrid AC/DC Transmission--This paper proposes a hybrid algorithm for the ac/dc transmission expansion planning (TEP). The stochastic simulation method would consider random outages of generating units and ac/dc transmission lines as well

  11. Emergence of rotational bands in ab initio no-core configuration interaction calculations

    E-Print Network [OSTI]

    M. A. Caprio; P. Maris; J. P. Vary; R. Smith

    2015-02-04

    Rotational bands have been observed to emerge in ab initio no-core configuration interaction (NCCI) calculations for p-shell nuclei, as evidenced by rotational patterns for excitation energies, electromagnetic moments, and electromagnetic transitions. We investigate the ab initio emergence of nuclear rotation in the Be isotopes, focusing on 9Be for illustration, and make use of basis extrapolation methods to obtain ab initio predictions of rotational band parameters for comparison with experiment. We find robust signatures for rotational motion, which reproduce both qualitative and quantitative features of the experimentally observed bands.

  12. Ab initio studies of niobium defects in uranium

    SciTech Connect (OSTI)

    Xiang, S; Huang, H; Hsiung, L

    2007-06-01

    Uranium (U), with the addition of small amount of niobium (Nb), is stainless. The Nb is fully miscible with the high temperature phase of U and tends to segregate upon cooling below 647 C. The starting point of segregation is the configuration of Nb substitutional or interstitial defects. Using density-functional-theory based ab initio calculations, the authors find that the formation energy of a single vacancy is 1.08 eV, that of Nb substitution is 0.59 eV, that of Nb interstitial at octahedral site is 1.58 eV, and that of Nb interstitial at tetrahedral site is 2.35 eV; all with reference to a reservoir of {gamma} phase U and pure Nb. The formation energy of Nb defects correlates with the local perturbation of electron distribution; higher formation energy to larger perturbation. Based on this study, Nb atoms thermodynamically prefer to occupy substitutional sites in {gamma} phase U, and they prefer to be in individual substitutional defects than clusters.

  13. AB Electronic Tubes and Quasi-Superconductivity at Room Temperature

    E-Print Network [OSTI]

    Alexander Bolonkin

    2008-05-02

    Author offers and researches a new idea - filling tubes by electronic gases. He shows: If the insulating envelope (cover) of the tube is charged positively, the electrons within the tube are not attracted to covering. Tube (as a whole) remains a neutral (uncharged) body. The electron gas in the tube has very low density and very high conductivity, close to superconductivity. If we take the density (pressure) of electron gas as equal to atmospheric pressure, the thickness of insulator film may be very small and the resulting tube is very light. Author shows the offered tubes can be applied to many technical fields. For example: (1) Transfer of energy over very long distance with very small electric losses. (2) Design of cheap high altitude electric lines without masts. (3) Transfer of energy from one continent to another continent through the ionosphere. (4) Transfer of a plasma beam (which can convey thrust and energy) from Earth surface to a space ship. (5) Observation of the sky by telescope without atmospheric hindrances. (6) Dirigibles (air balloons) of the highest lift force. (7) Increasing of gun range severalfold. (8) Transfer of matter. And so on. Key words: AB tubes, electronic tubes, superconductivity, transmission energy.

  14. Local Structure Analysis in $Ab$ $Initio$ Liquid Water

    E-Print Network [OSTI]

    Biswajit Santra; Robert A. DiStasio Jr.; Fausto Martelli; Roberto Car

    2015-02-27

    Within the framework of density functional theory, the inclusion of exact exchange and non-local van der Waals/dispersion (vdW) interactions is crucial for predicting a microscopic structure of ambient liquid water that quantitatively agrees with experiment. In this work, we have used the local structure index (LSI) order parameter to analyze the local structure in such highly accurate $ab$ $initio$ liquid water. At ambient conditions, the LSI probability distribution, P($I$), was unimodal with most water molecules characterized by more disordered high-density-like local environments. With thermal excitations removed, the resultant bimodal P($I$) in the inherent potential energy surface (IPES) exhibited a 3:1 ratio between high- and low-density-like molecules, with the latter forming small connected clusters amid the predominant population. By considering the spatial correlations and hydrogen bond network topologies $among$ water molecules with the same LSI identities, we demonstrate that the signatures of the experimentally observed low- (LDA) and high-density (HDA) amorphous phases of ice are present in the IPES of ambient liquid water. Analysis of the LSI autocorrelation function uncovered a persistence time of $\\sim$ 4 ps---a finding consistent with the fact that natural thermal fluctuations are responsible for transitions between these distinct yet transient local aqueous environments in ambient liquid water.

  15. DC switching regulated power supply for driving an inductive load

    DOE Patents [OSTI]

    Dyer, George R. (Norris, TN)

    1986-01-01

    A power supply for driving an inductive load current from a dc power supply hrough a regulator circuit including a bridge arrangement of diodes and switching transistors controlled by a servo controller which regulates switching in response to the load current to maintain a selected load current. First and second opposite legs of the bridge are formed by first and second parallel-connected transistor arrays, respectively, while the third and fourth legs of the bridge are formed by appropriately connected first and second parallel connected diode arrays, respectively. The regulator may be operated in three "stages" or modes: (1) For current runup in the load, both first and second transistor switch arrays are turned "on" and current is supplied to the load through both transistor arrays. (2) When load current reaches the desired level, the first switch is turned "off", and load current "flywheels" through the second switch array and the fourth leg diode array connecting the second switch array in series with the load. Current is maintained by alternating between modes 1 and 2 at a suitable duty cycle and switching rate set by the controller. (3) Rapid current rundown is accomplished by turning both switch arrays "off", allowing load current to be dumped back into the source through the third and fourth diode arrays connecting the source in series opposition with the load to recover energy from the inductive load. The three operating states are controlled automatically by the controller.

  16. A Very Low-Luminosity, Very Cool, DC White Dwarf

    E-Print Network [OSTI]

    Hugh Harris; Conard Dahn; Frederick Vrba; Arne Henden; James Liebert; Gary Schmidt; Neill Reid

    1999-06-03

    The star LHS 3250 is found to be a white dwarf at a distance of 30 pc. Its absolute magnitudes (M_V = 15.72; M_bol = 16.2) put it among the least-luminous white dwarfs known. Its optical spectrum shows no features, indicating it has a DC classification, and it shows no detectable polarization, indicating it does not have a very strong magnetic field. However, its broadband colors show it to have a unique spectral energy distribution, and it stands out from all other stars in BVI and other broadband photometric surveys. We discuss these properties, and conclude that LHS 3250 must be an extremely cool white dwarf with strong collision-induced absorption at red-infrared wavelengths from molecular hydrogen, in accord with models for very cool white dwarf atmospheres. If so, it is the first such star known, and the first star to provide observational evidence supporting these models. It suggests that other very cool white dwarfs, both halo white dwarfs and the oldest disk white dwarfs, also may have colors affected by similar absorption. The atmospheric composition of LHS 3250 is not known, and therefore its temperature is poorly determined. It may be a helium-core star with a mass 0.3-0.45 M_solar and a product of mass-transfer in a close binary system. However, until its temperature is better known, its mass and age remain uncertain.

  17. Deviational simulation of phonon transport in graphene ribbons with ab initio scattering

    E-Print Network [OSTI]

    Landon, Colin D.

    We present a deviational Monte Carlo method for solving the Boltzmann-Peierls equation with ab initio 3-phonon scattering, for temporally and spatially dependent thermal transport problems in arbitrary geometries. Phonon ...

  18. Ab Initio Investigation of Ethane Dissociation Using Generalized Transition State Theory Francois Lorant* and Francoise Behar

    E-Print Network [OSTI]

    Goddard III, William A.

    Ab Initio Investigation of Ethane Dissociation Using Generalized Transition State Theory Franc carbon-carbon scission of ethane is investigated by performing quantum mechanical calculations reported in this paper aim to validate this methodology by examining the dissociation of ethane

  19. Molecular modeling of hydrate-clathrates via ab initio, cell potential, and dynamic methods

    E-Print Network [OSTI]

    Anderson, Brian, Ph. D. Massachusetts Institute of Technology

    2005-01-01

    High level ab initio quantum mechanical calculations were used to determine the intermolecular potential energy surface between argon and water, corrected for many- body interactions, to predict monovariant and invariant ...

  20. Hydroxyl and molecular H2O diffusivity in a haploandesitic melt Huaiwei Ni a,b,

    E-Print Network [OSTI]

    Zhang, Youxue

    Hydroxyl and molecular H2O diffusivity in a haploandesitic melt Huaiwei Ni a,b, , Zhengjiu Xu c) rather than hydroxyl group (OH), water diffusivity has been experimentally determined for a variety

  1. A companion to AB Pic at the planet/brown dwarf boundary

    E-Print Network [OSTI]

    G. Chauvin; A. -M. Lagrange; B. Zuckerman; C. Dumas; D. Mouillet; I. Song; J. -L. Beuzit; P. Lowrance; M. S. Bessell

    2005-04-29

    We report deep imaging observations of the young, nearby star AB Pic, a member of the large Tucana-Horologium as sociation. We have detected a faint, red source 5.5" South of the star with JHK colors compatible with that of a young substellar L dwarf. Follow-up observations at two additional epochs confirm, with a confidence level of 4.7sigma, that the faint red object is a companion to AB Pic rather than it being a stationary background object. A low resolution K-band spectrum indicates an early-L spectral type for the companion. Finally, evolutionary model predictions based on the JHK photometry of AB Pic b indicate a mass of 13 to 14 MJup if its age is ~30Myr. Is AB Pic b a massive planet or a minimum mass brown dwarf?

  2. Atomistic and ab initio prediction and optimization of thermoelectric and photovoltaic properties

    E-Print Network [OSTI]

    Chan, Maria Kai Yee

    2009-01-01

    The accurate prediction of physical properties in the vast spaces of nanoscale structures and chemical compounds is made increasingly possible through the use of atomistic and ab initio computation. In this thesis we ...

  3. Erratum: "Ab initio computed diabatic potential energy surfaces of OHHCl" J. Chem. Phys. 122, 244325 ,,2005...

    E-Print Network [OSTI]

    Erratum: "Ab initio computed diabatic potential energy surfaces of OH­HCl" J. Chem. Phys. 122, 079902-1 Downloaded 18 Mar 2007 to 131.174.143.43. Redistribution subject to AIP license or copyright

  4. Publisher's Note: "Ab initio potential energy surfaces for NH,,3 -...-NH,,3 -

    E-Print Network [OSTI]

    Publisher's Note: "Ab initio potential energy surfaces for NH,,3 - ...-NH,,3 - ... with analytical.174.143.43. Redistribution subject to AIP license or copyright; see http://jcp.aip.org/about/rights_and_permissions #12;

  5. BNL-67857-AB AIRBORNE FORMALDEHYDE MEASUREMENT ON A NOAA WP-3 DURING THE 1999

    E-Print Network [OSTI]

    BNL-67857-AB AIRBORNE FORMALDEHYDE MEASUREMENT ON A NOAA WP-3 DURING THE 1999 SOS SUMMER FIELD, San Francisco, CA, Dec. 15-19, 2000. Atmospheric formaldehyde (HCHO) concentration was determined

  6. A KINE-CHEMICAL INVESTIGATION OF THE AB DOR MOVING GROUP 'STREAM'

    SciTech Connect (OSTI)

    Barenfeld, Scott A.; Bubar, Eric J.; Mamajek, Eric E. [University of Rochester, Department of Physics and Astronomy, Rochester, NY 14627-0171 (United States)] [University of Rochester, Department of Physics and Astronomy, Rochester, NY 14627-0171 (United States); Young, Patrick A. [Arizona State University, School of Earth and Space Exploration, Tempe, AZ 85287-1404 (United States)] [Arizona State University, School of Earth and Space Exploration, Tempe, AZ 85287-1404 (United States)

    2013-03-20

    The AB Dor Moving Group consists of a 'nucleus' of {approx}10 stars at d {approx_equal} 20 pc, along with dozens of purported 'stream' members distributed across the sky. We perform a chemical and kinematic analysis of a subsample of AB Dor stream stars to test whether they constitute a physical stellar group. We use the NEMO Galactic kinematic code to investigate the orbits of the stream members, and perform a chemical abundance analysis using high resolution spectra taken with the Magellan Clay 6.5 m telescope. Using a {chi}{sup 2} test with the measured abundances for 10 different elements, we find that only half of the purported AB Dor stream members could possibly constitute a statistically chemically homogeneous sample. Some stream members with three-dimensional velocities were hundreds of parsecs from the AB Dor nucleus {approx}10{sup 8} yr ago, and hence were unlikely to share a common origin. We conclude that the published lists of AB Dor moving group stream members are unlikely to represent the dispersed remnant of a single star formation episode. A subsample of the stream stars appears to be both statistically chemically homogeneous and in the vicinity of the AB Dor nucleus at birth. Their mean metallicity is [Fe/H] = 0.02 {+-} 0.02 dex, which we consider representative for the AB Dor group. Finally, we report a strong lower limit on the age of the AB Dor nucleus of >110 Myr based on the pre-main sequence contraction times for K-type members which have reached the main sequence.

  7. DC Pro Software Tool Suite, Data Center Fact Sheet, Industrial Technologies Program

    SciTech Connect (OSTI)

    Not Available

    2009-04-01

    This fact sheet describes how DOE's Data Center Energy Profiler (DC Pro) Software Tool Suite and other resources can help U.S. companies identify ways to improve the efficiency of their data centers.

  8. DC-OPF Formulation with Price-Sensitive Demand Bids Junjie Sun and Leigh Tesfatsion

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    DC-OPF Formulation with Price-Sensitive Demand Bids Junjie Sun and Leigh Tesfatsion Last Revised (TNCS) subject to various transmission constraints. As explained at length in Sun and Tesfation (2007

  9. ReHABit : claiming endangered structures in Washington DC to rethink subsidized housing

    E-Print Network [OSTI]

    Fowlkes, Catherine Kuhnle

    2007-01-01

    There is an affordable housing crisis today in Washington D.C. that is the result of a uniquely complicated history of a capital city and a current economic boom. This thesis responds to that crisis by proposing a new ...

  10. Dielectric relaxation and conduction in SrTiO{sub 3} thin films under dc bias

    SciTech Connect (OSTI)

    Ang, Chen; Yu, Zhi; Cross, L. E.; Guo, Ruyan; Bhalla, A. S.

    2001-08-06

    The dielectric and conduction behavior of SrTiO{sub 3} thin films deposited on a SrTiO{sub 3} single-crystal substrate is studied. Without dc bias, an obvious dielectric 'defect mode' in the dielectric loss is observed in the temperature range of {approx}100--200 K; however, no noticeable corresponding dielectric constant peak is observed. By applying a high dc bias ({>=}40 kV/cm), a dielectric constant peak with frequency dispersion appears in the same temperature range, the dielectric loss is increased, and simultaneously high dc conduction is observed. The induced dielectric constant peak is related to dc conduction and attributed to the coupling effect of the mobile carriers with the dielectric defect mode. {copyright} 2001 American Institute of Physics.

  11. DC power transmission from the Leningradskaya Nuclear Power Plant to Vyborg

    SciTech Connect (OSTI)

    Koshcheev, L. A.; Shul'ginov, N. G.

    2011-05-15

    DC power transmission from the Leningradskaya Nuclear Power Plant (LAES) to city of Vyborg is proposed. This will provide a comprehensive solution to several important problems in the development and control of the unified power system (EES) of Russia.

  12. New AC-DC Power Factor Correction Architecture Suitable for High Frequency Operation

    E-Print Network [OSTI]

    Lim, Seungbum

    This paper presents a novel ac-dc power factor correction (PFC) power conversion architecture for single-phase grid interface. The proposed architecture has significant advantages for achieving high efficiency, good power ...

  13. Vehicle Technologies Office Merit Review 2014: High Performance DC Bus Film Capacitor

    Office of Energy Efficiency and Renewable Energy (EERE)

    Presentation given by GE Global Research at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high performance DC bus...

  14. Vehicle Technologies Office Merit Review 2015: High Performance DC Bus Film Capacitor

    Office of Energy Efficiency and Renewable Energy (EERE)

    Presentation given by GE Global Research at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high performance DC bus...

  15. Multilevel-Dc-Bus Inverter For Providing Sinusoidal And Pwm Electrical Machine Voltages

    DOE Patents [OSTI]

    Su, Gui-Jia [Knoxville, TN

    2005-11-29

    A circuit for controlling an ac machine comprises a full bridge network of commutation switches which are connected to supply current for a corresponding voltage phase to the stator windings, a plurality of diodes, each in parallel connection to a respective one of the commutation switches, a plurality of dc source connections providing a multi-level dc bus for the full bridge network of commutation switches to produce sinusoidal voltages or PWM signals, and a controller connected for control of said dc source connections and said full bridge network of commutation switches to output substantially sinusoidal voltages to the stator windings. With the invention, the number of semiconductor switches is reduced to m+3 for a multi-level dc bus having m levels. A method of machine control is also disclosed.

  16. Development and evaluation of an implantable chronic DC stimulation and measurement probe for nerve regeneration studies 

    E-Print Network [OSTI]

    Macha, Douglas Bryan

    1995-01-01

    isotropic. The actual field strength or current density induced by the applied current is seldom directly measured in-vivo. This research seeks to evaluate the design of an implantable DC stimulator capable of delivering a constant, stable and measurable...

  17. DC Discharge Studies Using PIC-MCC: PIC Simulations Jeff Hammel & John Verboncoeur

    E-Print Network [OSTI]

    Wurtele, Jonathan

    DC Discharge Studies Using PIC-MCC: PIC Simulations Jeff Hammel & John Verboncoeur Electronics PIC Simulations (XPDP1) XPDP1, a 1D-3V PIC-MCC code (Verboncoeur et al., 1993), was used to simu- late

  18. Modeling of D/C motor driven synthetic jet acutators for flow separation control 

    E-Print Network [OSTI]

    Balasubramanian, Ashwin Kumar

    2004-11-15

    The objective of this research is to present a theoretical study of the compressibility effects on the performance of an electric D/C motor driven synthetic jet actuator for flow separation control. Hot wire anemometer experiments were conducted...

  19. Low speed control of a DC motor driving a mechanical system with fuzzy adaptive compensation 

    E-Print Network [OSTI]

    Hyun, Dongyoon

    1997-01-01

    A fuzzy adaptive feedforward control scheme in conjunction with classical feedback control is proposed for the low speed control of DC motors driving mechanical systems in the presence of friction. In the fuzzy adaptive scheme, a fuzzy logic based...

  20. Grid Modernization Highlighted in Washington DC in September with the Solar Decathlon

    Broader source: Energy.gov [DOE]

    Smart Grid is on display at the U.S. Department of Energy 2011 Solar Decathlon, held September 23 through October 2 on the National Mall, West Potomac Park, Washington, DC.  The decathlon...

  1. Area Efficient D/A Converters For Accurate DC Operation Brandon Royce Greenley

    E-Print Network [OSTI]

    Moon, Un-Ku

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 6.2 Mismatch Modeling For Area Optimization . . . . . . . . . . . . . . . . . . . . . . . 51 6Area Efficient D/A Converters For Accurate DC Operation by Brandon Royce Greenley A THESIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 5.1 Measurement Setup

  2. Assessment of Soil Erosion at a DC Park Facility Spring Valley Park

    E-Print Network [OSTI]

    District of Columbia, University of the

    park for the pilot assessment study. Failure to control erosion caused by the runoff of rain water can of Columbia Date: May 2005 Prepared for the DC Water Resources Research Institute Funded by USGS through

  3. Atmospheric characterization of the hot Jupiter Kepler-13Ab

    SciTech Connect (OSTI)

    Shporer, Avi; O'Rourke, Joseph G.; Knutson, Heather A.; Szabó, Gyula M.; Zhao, Ming; Burrows, Adam; Fortney, Jonathan; Agol, Eric; Cowan, Nicolas B.; Desert, Jean-Michel; Howard, Andrew W.; Isaacson, Howard; Lewis, Nikole K.; Showman, Adam P.; Todorov, Kamen O.

    2014-06-10

    Kepler-13Ab (= KOI-13.01) is a unique transiting hot Jupiter. It is one of very few known short-period planets orbiting a hot A-type star, making it one of the hottest planets currently known. The availability of Kepler data allows us to measure the planet's occultation (secondary eclipse) and phase curve in the optical, which we combine with occultations observed by warm Spitzer at 4.5 ?m and 3.6 ?m and a ground-based occultation observation in the K{sub s} band (2.1 ?m). We derive a day-side hemisphere temperature of 2750 ± 160 K as the effective temperature of a black body showing the same occultation depths. Comparing the occultation depths with one-dimensional planetary atmosphere models suggests the presence of an atmospheric temperature inversion. Our analysis shows evidence for a relatively high geometric albedo, A {sub g} = 0.33{sub ?0.06}{sup +0.04}. While measured with a simplistic method, a high A {sub g} is supported also by the fact that the one-dimensional atmosphere models underestimate the occultation depth in the optical. We use stellar spectra to determine the dilution, in the four wide bands where occultation was measured, due to the visual stellar binary companion 1.''15 ± 0.''05 away. The revised stellar parameters measured using these spectra are combined with other measurements, leading to revised planetary mass and radius estimates of M{sub p} = 4.94-8.09 M {sub J} and R{sub p} = 1.406 ± 0.038 R {sub J}. Finally, we measure a Kepler midoccultation time that is 34.0 ± 6.9 s earlier than expected based on the midtransit time and the delay due to light-travel time and discuss possible scenarios.

  4. Gaseous and particulate emissions from a DC arc melter

    SciTech Connect (OSTI)

    Overcamp, T.J.; Speer, M.P.; Griner, S.J.; Cash, D.M. [Clemson Univ., Anderson, SC (United States)

    1997-12-31

    This paper presents the results of the gaseous and particulate emissions from eight experimental tests of a DC arc melter to treat simulated Savannah River soils contaminated with metals, surrogates for radionuclides, and organic debris. The gaseous analyses reported on the concentrations of oxygen, hydrogen, carbon monoxide, carbon dioxide, hydrogen, methane, nitric oxide, and nitrogen dioxide. The carbon dioxide concentration was high for all runs. For the runs with an air purge, the carbon monoxide concentration ranged up to 10% in the runs with the debris and 2% in the runs without debris. Hydrogen ranged up to 5% by with debris and up to 1% without debris. The methane concentration ranged up to 7,000 ppm{sub v} for the runs with debris and 2,000 ppm for the runs without debris. With a nitrogen purge, oxygen concentrations were less than 1%. The carbon dioxide concentrations ranged from 3 to 15%. Much of this carbon dioxide was probably due the carbonates added to the feed material. The carbon monoxide concentration ranged up to 20% with the debris and 7% without debris. Hydrogen was above 6% in with debris and up to 6% without debris. The methane concentration ranged up to 10,000 ppm{sub v} with debris and 4,000 ppm{sub v} without debris. The particulate concentrations exiting ranged from 32 to 145 g/m{sup 3}. From the chemical analyses, the primary elements were silicon and calcium. The CHN analyses indicated that carbon, probably as carbonates, are an additional component in the particulate matter. The estimated emissions were at a level of 3% or less for cerium, up to 7% for nickel, and 11 to 30% for cesium.

  5. Absorption: an update In the Netherlands, a residential ab-is being incorporated now. As a conse-cepts prove to be economically viable, ab-

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    . As a conse- cepts prove to be economically viable, ab- sorption heat pump isunder development quence- broad range of applications isenvisioned. significant role in the HVAC industry ina changers. First tests indicate its dustrial applications (8) could emerge . Proc oftheDOE/ORNLHeat Pump

  6. Abstract--A novel control scheme for improving the power efficiency of low-voltage DC-DC converters for battery-powered,

    E-Print Network [OSTI]

    Rincon-Mora, Gabriel A.

    -DC converters for battery-powered, portable applications is presented. In such applications, light- load efficiency is crucial for extending battery life, since mobile devices operate in stand-by mode for most-of-the-art techniques. As a result, the battery life in a typical DSP microprocessor application is improved by 7

  7. Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings

    SciTech Connect (OSTI)

    Garbesi, Karina; Vossos, Vagelis; Sanstad, Alan; Burch, Gabriel

    2011-10-13

    An increasing number of energy efficient appliances operate on direct current (DC) internally, offering the potential to use DC from renewable energy systems directly and avoiding the losses inherent in converting power to alternating current (AC) and back. This paper investigates that potential for net-metered residences with on-site photovoltaics (PV) by modeling the net power draw of the ‘direct-DC house’ with respect to today’s typical configuration, assuming identical DC-internal loads. Power draws were modeled for houses in 14 U.S. cities, using hourly, simulated PV-system output and residential loads. The latter were adjusted to reflect a 33% load reduction, representative of the most efficient DC-internal technology, based on an analysis of 32 electricity end-uses. The model tested the effect of climate, electric vehicle (EV) loads, electricity storage, and load shifting on electricity savings; a sensitivity analysis was conducted to determine how future changes in the efficiencies of power system components might affect savings potential. Based on this work, we estimate that net-metered PV residences could save 5% of their total electricity load for houses without storage and 14% for houses with storage. Based on residential PV penetration projections for year 2035 obtained from the National Energy Modeling System (2.7% for the reference case and 11.2% for the extended policy case), direct-DC could save the nation 10 trillion Btu (without storage) or 40 trillion Btu (with storage). Shifting the cooling load by two hours earlier in the day (pre-cooling) has negligible benefits for energy savings. Direct-DC provides no energy savings benefits for EV charging, to the extent that charging occurs at night. However, if charging occurred during the day, for example with employees charging while at work, the benefits would be large. Direct-DC energy savings are sensitive to power system and appliance conversion efficiencies but are not significantly influenced by climate. While direct-DC for residential applications will most likely arise as a spin-off of developments in the commercial sector—because of lower barriers to market entry and larger energy benefits resulting from the higher coincidence between load and insolation—this paper demonstrates that there are substantial benefits in the residential sector as well. Among residential applications, space cooling derives the largest energy savings from being delivered by a direct-DC system. It is the largest load for the average residence on a national basis and is particularly so in high-load regions. It is also the load with highest solar coincidence.

  8. AB Blanket for Cities (for continual pleasant weather and protection from chemical, biological and radioactive weapons)

    E-Print Network [OSTI]

    Alexander Bolonkin

    2009-02-04

    In a series of previous articles (see references) the author offered to cover a city or other important large installations or subregions by a transparent thin film supported by a small additional air overpressure under the form of an AB Dome. The building of a gigantic inflatable AB Dome over an empty flat surface is not difficult. However, if we want to cover a city, garden, forest or other obstacle course we cannot easily deploy the thin film over building or trees. In this article is suggested a new method which solves this problem. The idea is to design a double film blanket filled by light gas (for example, methane, hydrogen, or helium). Sections of this AB Blanket are lighter then air and fly in atmosphere. They can be made on a flat area (serving as an assembly area) and delivered by dirigible or helicopter to station at altitude over the city. Here they connect to the already assembled AB Blanket subassemblies, cover the city in an AB Dome and protect it from bad weather, chemical, biological and radioactive fallout or particulates. After finish of dome building the light gas can be changed by air. Two projects for Manhattan (NY, USA) and Moscow (Russia) are targets for a sample computation.

  9. One-dimensional hybrid simulation of the dc/RF combined driven capacitively coupled CF{sub 4} plasmas

    SciTech Connect (OSTI)

    Wang Shuai [School of Science, Northeastern University, Shenyang 110891 (China); Xu Xiang; Wang Younian [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)

    2012-11-15

    We developed a one-dimensional hybrid model to simulate the dc/RF combined driven capacitively coupled plasma for CF{sub 4} discharges. The numerical results show the influence of the dc source on the plasma density distribution, ion energy distributions (IEDs), and ion angle distributions (IADs) on both RF and dc electrodes. The increase of dc voltage impels more ions with high energy to the electrode applied to the dc source, which makes the IEDs at the dc electrode shift toward higher energy and the peaks in IADs shift toward the small angle region. At the same time, it also decreases ion-energy at the RF electrode and enlarges the ion-angles which strike the RF electrode.

  10. A VUV Photoionization and Ab Initio Determination of the Ionization Energy of a Gas Phase Sugar (Deoxyribose).

    E-Print Network [OSTI]

    Ghosh, Debashree

    2012-01-01

    electronic structure calculations of vertical and adiabatic ionization energies. Ab initio molecular dynamics (dynamics snapshots along the reaction coordinate. Keywords: sugars, synchrotron radiation, electronic structure calculations,

  11. Performance Study of K2CsSb Photocathode inside a DC High Voltage Gun

    SciTech Connect (OSTI)

    T. Rao, J. Smedley, J.M. Grames, R. Mammei, J.L. McCarter, M. Poelker, R. Suleiman

    2011-03-01

    In the past decade, there has been considerable interest in the generation of tens of mA average current in a photoinjector. Until recently, GaAs:Cs cathodes and K2CsSb cathodes have been tested successfully in DC and RF injectors respectively for this application. Our goal is to test the GaAs:Cs in RF injector and the K2CsSb cathode in the DC gun in order to widen our choices. Since the multialkali cathode is a compound with uniform stochiometry over its entire thickness, we anticipate that the life time issues seen in GaAs:Cs due surface damage by ion bombardment would be minimized with this material. Hence successful operation of the K2CsSb cathode in DC gun could lead to a relatively robust electron source capable of delivering ampere level currents. In order to test the performance of K2CsSb cathode in a DC gun, we have designed and built a load lock system that would allow the fabrication of the cathode at BNL and its testing at JLab. In this paper, we will present the design of the load-lock system, cathode fabrication, and the cathode performance in the preparation chamber and in the DC gun.

  12. Performance Study of K2CsSb Photocathode Inside a DC High Voltage Gun

    SciTech Connect (OSTI)

    McCarter J. L.; Rao T.; Smedley, J.; Grames, J.; Mammei, R.; Poelker, M.; Suleiman, R.

    2011-09-01

    In the past decade, there has been considerable interest in the generation of tens of mA average current in a photoinjector. Until recently, GaAs:Cs cathodes and K{sub 2}CsSb cathodes have been tested successfully in DC and RF injectors respectively for this application. Our goal is to test the K{sub 2}CsSb photocathode inside a DC gun. Since the multialkali cathode is a compound with constant characteristics over its entire thickness, we anticipate that the lifetime issues seen in GaAs:Cs due to surface damage by ion bombardment would be minimized. Hence successful operation of the K{sub 2}CsSb cathode in a DC gun could lead to a relatively robust electron source capable of delivering ampere level currents. In order to test the performance of a K{sub 2}CsSb cathode in a DC gun, we have designed and built a load lock system that allows the fabrication of the cathode at Brookhaven National Lab (BNL) and its testing at Jefferson Lab (JLab). In this paper, we will present the performance of the K{sub 2}CsSb photocathode in the preparation chamber and in the DC gun.

  13. AB 2188: Implementation of the California Solar Rights Act at the Local Level

    Broader source: Energy.gov [DOE]

    This document is intended to provide guidance for implementing the Solar Permitting Efficiency Act (AB 2188), which was enacted in California in 2015, in substantial conformance with the California Solar Permitting Guidebook. This document also includes a stand-alone model ordinance that complies with the requirements of the Solar Rights Act, as amended. The sections of this document are organized to first provide the reader with the statutory requirements of AB 2188 and the existing requirements of the Solar Rights Act, followed by the recommendations from the California Solar Permitting Guidebook for substantial conformance with regard to the permitting requirements for local permitting processes.

  14. A Low Voltage, Rail-to-Rail, Class AB CMOS Amplifier With High Drive and Low Output Impedance Characteristics

    E-Print Network [OSTI]

    Rincon-Mora, Gabriel A.

    1 A Low Voltage, Rail-to-Rail, Class AB CMOS Amplifier With High Drive and Low Output Impedance describes a CMOS rail-to-rail class AB operational amplifier designed to have extremely low output impedance. The source follower ensures low output impedance, which enables it to drive relatively large load capacitors

  15. Ab initio calculations of off-diagonal hyperfine interaction in cesium A. Derevianko, M. S. Safronova, and W. R. Johnson

    E-Print Network [OSTI]

    Johnson, Walter R.

    Ab initio calculations of off-diagonal hyperfine interaction in cesium A. Derevianko, M. S interaction mixing amplitude Mhf for the 6s-7s transition in atomic cesium. The ab initio result Mhf 0 lev- els F and F of 6s and 7s states in cesium can be repre- sented as AM1 M F F Mhf . The first term

  16. Fully ab initio atomization energy of benzene via Weizmann-2 theory Srinivasan Parthiban and Jan M. L. Martina)

    E-Print Network [OSTI]

    Martin, Jan M.L.

    Fully ab initio atomization energy of benzene via Weizmann-2 theory Srinivasan Parthiban and Jan M at absolute zero, (TAE0) of benzene, C6H6, was computed fully ab initio by means of W2h theory as 1306.6 kcal for systems the size of benzene, chemically accurate molecular atomization energies can be obtained from fully

  17. Greatwall-phosphorylated Endosulfine is Both an Inhibitor and a Substrate of PP2A-B55 Heterotrimers

    E-Print Network [OSTI]

    Byron C. Williams; Joshua J. Filter; Kristina A. Blake-Hodek; Brian E. Wadzinski; Nicholas J. Fuda; David Shalloway; Michael L. Goldberg

    2014-02-17

    During M phase, Endosulfine (Endos) family proteins are phosphorylated by Greatwall kinase (Gwl), and the resultant pEndos inhibits the phosphatase PP2A-B55, which would otherwise prematurely reverse many CDK-driven phosphorylations. We show here that PP2A-B55 is the enzyme responsible for dephosphorylating pEndos during M phase exit. The kinetic parameters for PP2A-B55's action on pEndos are orders of magnitude lower than those for CDK-phosphorylated substrates, suggesting a simple model for PP2A-B55 regulation that we call inhibition by unfair competition. As the name suggests, during M phase PP2A-B55's attention is diverted to pEndos, which binds much more avidly and is dephosphorylated more slowly than other substrates. When Gwl is inactivated during the M phase-to-interphase transition, the dynamic balance changes: pEndos dephosphorylated by PP2A-B55 cannot be replaced, so the phosphatase can refocus its attention on CDK-phosphorylated substrates. This mechanism explains simultaneously how PP2A-B55 and Gwl together regulate pEndos, and how pEndos controls PP2A-B55.

  18. Energy of the quasi-free electron in argon, krypton and xenon Xianbo Shi a,b

    E-Print Network [OSTI]

    Findley, Gary L.

    Energy of the quasi-free electron in argon, krypton and xenon Xianbo Shi a,b , Luxi Li a,b , C. M ionization of the dopant, and (iii) the kinetic energy of the quasi-free electron. The polarization terms are determined by a standard statistical mechanical treatment. However, the kinetic energy of the quasi-free

  19. Dynamic magnetization states of a spin valve in the presence of dc and ac currents: Synchronization, modification, and chaos

    E-Print Network [OSTI]

    Li, Charles

    Dynamic magnetization states of a spin valve in the presence of dc and ac currents: Synchronization and numerical calculations of dynamic magnetization states of a spin valve in the presence of dc and ac currents are expected to appear. In this paper, we consider a simple spin valve as a model system to study the problem

  20. Abstract--Environmentally friendly technologies such as photovoltaics and fuel cells are DC sources. In the current power

    E-Print Network [OSTI]

    Tolbert, Leon M.

    Abstract--Environmentally friendly technologies such as photovoltaics and fuel cells are DC sources in pollution [1]. The most well-known green technologies include photovoltaics and wind turbines. Although fuel, fuel cells and photovoltaics, produce direct current (DC). Currently, power system infrastructures

  1. Superconductivity for Electric Systems Annual Peer Review Washington, DC July 27-29, 2004. OAK RIDGE NATIONAL LABORATORY

    E-Print Network [OSTI]

    Superconductivity for Electric Systems Annual Peer Review Washington, DC ­ July 27-29, 2004. OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY American Superconductor Corporation U. Schoop, M. W&D support #12;Superconductivity for Electric Systems Annual Peer Review Washington, DC ­ July 27-29, 2004

  2. Optimal Demand Response in DC Distribution Networks Hamed Mohsenian-Rad, Member, IEEE and Ali Davoudi, Member, IEEE

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Optimal Demand Response in DC Distribution Networks Hamed Mohsenian-Rad, Member, IEEE and Ali first present an optimization-based foundation for demand response in DC distribution networks. Then, we devise a pricing mechanism to enforce optimal demand response in a distributed fashion. Simulation

  3. Jaworski Liquid metal PSI science and component development FESAC Meeting, Washington DC July 8-10, 2014

    E-Print Network [OSTI]

    Jaworski ­ Liquid metal PSI science and component development ­ FESAC Meeting, Washington DC ­ July 8-10, 2014 Liquid metal plasma-material interaction science and component development MA Jaworski on behalf of the Liquid Metal Plasma-Facing Component working group FESAC Meeting, Washington DC ­ July 8

  4. Ab initio studies of Nanoparticle Photovoltaics: MEG, Exotic core phases & Complementary transport

    E-Print Network [OSTI]

    Ab initio studies of Nanoparticle Photovoltaics: MEG, Exotic core phases & Complementary transport. Kaxiras (Harvard) A. Gali D. Rocca M. Voros S. Wippermann I. Carbone G. Zimanyi (UC Davis) #12;Solar phonons phonons #12;Solar Energy Conversion: Relaxation by excitons 3 E DOS Keep energy of high energy

  5. Cationic fluorinated polymer binders for microbial fuel cell cathodes{ Guang Chen,ab

    E-Print Network [OSTI]

    or carbons) in the cathode is held in contact with the current collector using a polymer binder.12Cationic fluorinated polymer binders for microbial fuel cell cathodes{ Guang Chen,ab Bin Wei.1039/c2ra20705b Fluorinated quaternary ammonium-containing polymers were used as catalyst binders

  6. Coral reef evolution on rapidly subsiding margins Jody M. Webster a,b,

    E-Print Network [OSTI]

    Riding, Robert

    Coral reef evolution on rapidly subsiding margins Jody M. Webster a,b, , Juan Carlos Braga d regions have experienced rapid subsidence (2­6 m/ka) over the last 500 ka. Rapid subsidence, combined sea-level changes, subsidence rates, accretion rates, basement substrates, and paleobathymetry

  7. Ab Initio Studies of Vacancy-Defected Fullerenes and Single-Walled Carbon

    E-Print Network [OSTI]

    Wang, Yan Alexander

    over the world have been attracted to the research field of fullerenes and carbon nanotubes. Such nanoAb Initio Studies of Vacancy-Defected Fullerenes and Single-Walled Carbon Nanotubes LEI VINCENT LIU,1 WEI QUAN TIAN,2 YAN ALEXANDER WANG1 1 Department of Chemistry, University of British Columbia

  8. Biogenic emissions from Citrus species in California Silvano Fares a,b,*, Drew R. Gentner c

    E-Print Network [OSTI]

    Goldstein, Allen

    Biogenic emissions from Citrus species in California Silvano Fares a,b,*, Drew R. Gentner c , Jeong May 2011 Accepted 26 May 2011 Keywords: BVOC emissions OVOC Terpene Basal emission rate Citrus a b such as the Central Valley of California. Moreover, the BVOC emissions from Citrus species have not been characterized

  9. A=B: The Case for CAS and Research in High School Mathematics by Justin Burner

    E-Print Network [OSTI]

    Yong, Alexander

    A=B: The Case for CAS and Research in High School Mathematics by Justin Burner Having excelled. The implementation of these devices, however, has been overall lackluster. #12;Burner 2 These devices are primarily does that #12;Burner 3 actually do that?' " [Young 2009]. A basic understanding of computer languages

  10. FMCW radars for snow research Hans-Peter Marshall a,b,, Gary Koh a

    E-Print Network [OSTI]

    Marshall, Hans-Peter

    FMCW radars for snow research Hans-Peter Marshall a,b,, Gary Koh a a Cold Regions Research; accepted 16 April 2007 Abstract Frequency Modulated Continuous Wave (FMCW) radars have been used by snow measurements, as properties such as snow depth can be measured quickly and non- destructively. Recent advances

  11. Ab initio simulations of dense liquid deuterium: Comparison with gas gun shock wave experiments

    E-Print Network [OSTI]

    Militzer, Burkhard

    Ab initio simulations of dense liquid deuterium: Comparison with gas gun shock wave experiments functional calculations leading to excellent agreement with gas gun shock wave measurements, which have As a result of this discrep- ancy, considerable attention is now being paid to older gas gun shock wave

  12. Osmotically induced deformation of capsid-like icosahedral vesicles Gaelle Bealle,ab

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Osmotically induced deformation of capsid-like icosahedral vesicles Gaelle Bealle,ab Jacques We report the osmotic deformation of micron-size catanionic vesicles with icosahedral symmetry (20 at low osmotic pressure gradients across the bilayer, or spherical for outwards gradients. Above

  13. Method for the separation of high impact polystyrene (HIPS) and acrylonitrile butadiene styrene (ABS) plastics

    DOE Patents [OSTI]

    Jody, Bassam J. (Chicago, IL); Arman, Bayram (Amherst, NY); Karvelas, Dimitrios E. (Downers Grove, IL); Pomykala, Jr., Joseph A. (Crest Hill, IL); Daniels, Edward J. (Oak Lawn, IL)

    1997-01-01

    An improved method is provided for separating acrylonitrile butadiene styrene (ABS) and high impact polystyrene (HIPS) plastics from each other. The ABS and HIPS plastics are shredded to provide a selected particle size. The shredded particles of the ABS and HIPS plastics are applied to a solution having a solution density in a predefined range between 1.055 gm/cm.sup.3 and 1.07 gm/cm.sup.3, a predefined surface tension in a range between 22 dynes/cm to 40 dynes/cm and a pH in the range of 1.77 and 2.05. In accordance with a feature of the invention, the novel method is provided for separating ABS and HIPS, two solid thermoplastics which have similar densities by selectively modifying the effective density of the HIPS using a binary solution with the appropriate properties, such as pH, density and surface tension, such as a solution of acetic acid and water or a quaternary solution having the appropriate density, surface tension, and pH.

  14. COMMUNICATION Proteins with Class a/b Fold Have High-level

    E-Print Network [OSTI]

    Gough, Julian

    COMMUNICATION Proteins with Class a/b Fold Have High-level Participation in Fusion Events Sujun Hua association of the component proteins. Here, we took a new approach to the analysis of the structural features of the proteins involved in fusion events. An exhaustive survey of fusion events within 30 completely sequenced

  15. KN/ab 12/09 HUNTER COLLEGE OF THE CITY UNIVERSITY OF NEW YORK

    E-Print Network [OSTI]

    Qiu, Weigang

    KN/ab 12/09 HUNTER COLLEGE OF THE CITY UNIVERSITY OF NEW YORK MASTER OF SCIENCE IN NURSING PROGRAM of card) 5. BCLS Certification 6. Malpractice Insurance ($1,000,000/$3,000,000 Minimum Requirement) 7. New York State RN License and Current Registration 8. Additional Requirements of Affiliating Agencies 9

  16. Intelligent Market-Making in Artificial Financial A.B. Computer Science

    E-Print Network [OSTI]

    Poggio, Tomaso

    Intelligent Market-Making in Artificial Financial Markets by Sanmay Das A.B. Computer Science by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Arthur C. Smith Chairman, Department Committee on Graduate Students #12;2 #12;Intelligent Market-Making in Artificial Financial Markets by Sanmay Das Submitted to the Department of Electrical Engineering and Computer

  17. Atmospheric plasma deposition of diamond-like carbon coatings Angela M. Ladwig a,b,

    E-Print Network [OSTI]

    Hicks, Robert F.

    include ion beam deposition, cathodic arc spray, pulsed laser ablation, argon ion sputtering, and plasmaAtmospheric plasma deposition of diamond-like carbon coatings Angela M. Ladwig a,b, , Ronald D Available online xxxx Keywords: Atmospheric pressure plasma Diamond-like carbon deposition DLC PECVD

  18. A direct ab inifio dynamics approach for calculating thermal rate constants using variational transition state theory

    E-Print Network [OSTI]

    Truong, Thanh N.

    of a focusing technique to minimize the number of electronic structure calculations, while still preservingA direct ab inifio dynamics approach for calculating thermal rate constants using variational dynamics, " for calculations of thermal rate constants and related properties from first principles

  19. A microfluidic microbial fuel cell fabricated by soft lithography Fang Qian a,b,

    E-Print Network [OSTI]

    A microfluidic microbial fuel cell fabricated by soft lithography Fang Qian a,b, , Zhen He c microfluidic microbial fuel cell (MFC) platform built by soft-lithography tech- niques. The MFC design includes a unique sub-5 lL polydimethylsiloxane soft chamber featuring carbon cloth electrodes and microfluidic

  20. Microfluidic capture and release of bacteria in a conical nanopore array Peng Guo,ab

    E-Print Network [OSTI]

    Zare, Richard N.

    Microfluidic capture and release of bacteria in a conical nanopore array Peng Guo,ab Eric W. Hall a microfluidic device. As an example, we demonstrate that cyanobacteria can be captured, one bacterium per pore, in a conical nanoporous membrane (CNM) integrated into a microfluidic chip. This study, to our knowledge

  1. Microfluidic arrays for logarithmically perfused embryonic stem cell Lily Kim,ab

    E-Print Network [OSTI]

    Voldman, Joel

    Microfluidic arrays for logarithmically perfused embryonic stem cell culture Lily Kim,ab Michael D published as an Advance Article on the web 19th January 2006 DOI: 10.1039/b511718f We present a microfluidic there has been increasing interest in culturing cells in perfused microfluidic environments. In conventional

  2. Vegetation patterns along a rainfall gradient Ehud Meron a,b,*, Erez Gilad b,a

    E-Print Network [OSTI]

    Meron, Ehud

    Hardenberg c , Moshe Shachak d , Yair Zarmi a,b a Department of Solar Energy and Environmental Physics, BIDR author. Address: Department of Solar Energy and Environmental Physics, BIDR, Ben-Gurion University, Sede feedback between biomass (amount of plant matter) and soil water [16]. The more soil water the faster

  3. Hydrogen bonding in solid ammonia from ab initio calculations A. D. Fortes,a)

    E-Print Network [OSTI]

    Vocadlo, Lidunka

    Hydrogen bonding in solid ammonia from ab initio calculations A. D. Fortes,a) J. P. Brodholt, I. G the tendency toward symmetrization of the hydrogen bonds at high pressures and find that, unlike pure ice that ammonia IV does not contain a bifurcated hydrogen bond, as has previously been suggested. © 2003 American

  4. Ab initio study of charge transfer in low energy Si 2+ collisions with atomic hydrogen

    E-Print Network [OSTI]

    Stancil, Phillip C.

    Ab initio study of charge transfer in low energy Si 2+ collisions with atomic hydrogen N J Clarkey Si 2+ (3s 2 1 S) and excited state Si 2+ (3s3p 3 P o ) with atomic hydrogen are presented for energies less than 100 eV amu \\Gamma1 . The cross sections are calculated in a diabatic representation

  5. Ab initio study of charge transfer in B 2+ low-energy collisions with atomic hydrogen

    E-Print Network [OSTI]

    Stancil, Phillip C.

    Ab initio study of charge transfer in B 2+ low-energy collisions with atomic hydrogen A. R. Turner due to collisions of ground state B 2+ (2s 2 S) ions with atomic hydrogen are investigated using coupling are small (energy: for collision

  6. Electrical conductivity of wadsleyite at high temperatures and high pressures Lidong Dai a,b

    E-Print Network [OSTI]

    Electrical conductivity of wadsleyite at high temperatures and high pressures Lidong Dai a,b , Shun 2009 Editor: L. Stixrude Keywords: electrical conductivity wadsleyite oxygen fugacity frequency water The electrical conductivity of wadsleyite aggregates has been determined under the broad range of thermodynamic

  7. Synthesis of High-Performance Parallel Programs for a Class of Ab Initio Quantum

    E-Print Network [OSTI]

    Baumgartner, Gerald

    Synthesis of High-Performance Parallel Programs for a Class of Ab Initio Quantum Chemistry Models SIBIRYAKOV Invited Paper This paper provides an overview of a program synthesis system for a class of quantum; revised October 15, 2004. This work was supported in part by the National Science Founda- tion under

  8. NVLAP ASSESSOR BULLETIN AB-10-2010 PAGE 1 OF 1 DEPARTMENT OF COMMERCE

    E-Print Network [OSTI]

    that calibrations and measurements made by the laboratory are traceable to the International System of Units (SI ASSESSOR BULLETIN NUMBER: AB-10-2010 LAP: All SUBJECT: Assessment of Requirements for Measurement. The purpose of this bulletin is to remind assessors of issues related to assuring measurement traceability

  9. Biocontrol of plant disease: a (Gram-) positive perspective Elizabeth A.B. Emmert Y

    E-Print Network [OSTI]

    Handelsman, Jo

    to the downfall of a biocontrol agent. Knowledge of the biological environment in which the agent will be used utilizing Gram-positive biocontrol agents that have been researched in depth and provide modelsMiniReview Biocontrol of plant disease: a (Gram-) positive perspective Elizabeth A.B. Emmert Y , Jo

  10. Polymeric semiconductor/graphene hybrid field-effect transistors Jia Huang a,b,

    E-Print Network [OSTI]

    Polymeric semiconductor/graphene hybrid field-effect transistors Jia Huang a,b, , Daniel R. Hines semiconductor Graphene Thin film transistor Hybrid material a b s t r a c t Solution processed organic field semiconductors and graphene. Compared against OFETs with only pure organic semiconductors, our hybrid FETs

  11. Perovskite Quantum Dots Modeled Using ab Initio and Replica Exchange Molecular Dynamics

    E-Print Network [OSTI]

    Sargent, Edward H. "Ted"

    Perovskite Quantum Dots Modeled Using ab Initio and Replica Exchange Molecular Dynamics Andrei Buin halide perovskites have recently attracted tremen- dous attention at both the experimental. Here we investigate perovskite quantum dots from theory, predicting an upper bound of the Bohr radius

  12. Statistical analysis of wind energy in Chile David Watts a,b,*, Danilo Jara a

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Católica de Chile)

    Data Bank Statistical analysis of wind energy in Chile David Watts a,b,*, Danilo Jara December 2010 Keywords: Wind Wind speed Energy Capacity factor Electricity Chile a b s t r a c t Bearing role in any future national energy generation matrix. With a view to understanding the local wind

  13. G8-kompatibler Mathe-Bachelor ab WS 2014 Gero Friesecke, Christian Kredler

    E-Print Network [OSTI]

    Kemper, Gregor

    G8-kompatibler Mathe-Bachelor ab WS 2014 Gero Friesecke, Christian Kredler Mitarbeiterversammlung-Uni (1 = keine, 5 = massiv) alle G9 G8 #12;Massnahmen f¨ur Studienanfang WS 2014 Anpassung an G8 (neues ehem. Studierende #12;Anpassung an G8 Prinzip: 'Minimal change' Prop¨adeutikum 'Diskrete Mathematik' (1

  14. On the moving boundary conditions for a hydraulic fracture Emmanuel Detournay a,b,

    E-Print Network [OSTI]

    Peirce, Anthony

    On the moving boundary conditions for a hydraulic fracture Emmanuel Detournay a,b, , Anthony Peirce 2014 Keywords: Hydraulic fractures Speed equation Ill-posedness a b s t r a c t This paper re-examines the boundary conditions at the moving front of a hydraulic fracture when the fluid front has coalesced

  15. Ab initio statistical mechanics of surface adsorption and desorption. II. Nuclear quantum effects

    E-Print Network [OSTI]

    Alfè, Dario

    systems for which quantum contributions to the free energy are known exactly from analytic arguments/mol. As a contribution to these developments, we present here a practical scheme for including quantum nuclear effectsAb initio statistical mechanics of surface adsorption and desorption. II. Nuclear quantum effects D

  16. A review of recent advances in ab initio protein folding by the Folding@home project

    E-Print Network [OSTI]

    A review of recent advances in ab initio protein folding by the Folding@home project William Ito molecular simulations of protein folding. Thanks to engineering innovations like a Graphical Processing Unit power, allowing it to simulate longer and more complex protein folding mechanisms than ever before

  17. Advancing beyond current generation dye-sensitized solar cells Thomas W. Hamann,ab

    E-Print Network [OSTI]

    of oil will soon not be able to keep up with the growing demand leading to dire economic consequences.2, they are not yet an economically viable alternative to fossil fuels.7 The abundant supply and environmentalAdvancing beyond current generation dye-sensitized solar cells Thomas W. Hamann,ab Rebecca A

  18. http://arXiv.org/abs/physics/0011002 A HISTORICAL PERSPECTIVE ON CANCER *

    E-Print Network [OSTI]

    Sorkin, Rafael Dolnick

    http://arXiv.org/abs/physics/0011002 A HISTORICAL PERSPECTIVE ON CANCER * Rafael D. Sorkin@physics.syr.edu Abstract It is proposed that cancer results from the breakdown of universal con­ trol mechanisms which the damaged control mechanisms and thereby arresting the cancer. More or less by definition, a cancerous cell

  19. http://arXiv.org/abs/physics/0011002 A HISTORICAL PERSPECTIVE ON CANCER *

    E-Print Network [OSTI]

    Sorkin, Rafael Dolnick

    http://arXiv.org/abs/physics/0011002 A HISTORICAL PERSPECTIVE ON CANCER * Rafael D. Sorkin@physics.syr.edu Abstract It is proposed that cancer results from the breakdown of universal con- trol mechanisms which the damaged control mechanisms and thereby arresting the cancer. More or less by definition, a cancerous cell

  20. Satellite remote sensing of surface air quality Randall V. Martin a,b,*

    E-Print Network [OSTI]

    Martin, Randall

    Review Satellite remote sensing of surface air quality Randall V. Martin a,b,* a Department 2007 Received in revised form 26 June 2008 Accepted 2 July 2008 Keywords: Remote sensing Air quality Satellite Pollution Emissions a b s t r a c t Satellite remote sensing of air quality has evolved

  1. Ab initio treatment of electron correlations in polymers: Lithium hydride chain and beryllium hydride polymer

    E-Print Network [OSTI]

    Birkenheuer, Uwe

    Ab initio treatment of electron correlations in polymers: Lithium hydride chain and berylliumH and beryllium hydride Be2H4 . First, employing a Wannier-function-based approach, the systems are studiedH and the beryllium hydride polymer Be2H4 . As a simple, but due to its ionic character, non- trivial model polymer

  2. ECE 230A/B AP/EDM (Grad) MS Comprehensive Exam FA10

    E-Print Network [OSTI]

    Wang, Deli

    ECE 230A/B ­ AP/EDM (Grad) MS Comprehensive Exam FA10 Problem 1 For the 1-D Ga (everything else unchanged). (d) Replace the Si base with a uniform SiGe base of bandgap 0.1 eV smaller than that of Si (everything else unchanged). #12;

  3. Ab-initio Kinetic Monte Carlo Model of Ionic Conduction in Bulk Yttria-stabilized Zirconia

    E-Print Network [OSTI]

    Cai, Wei

    Ab-initio Kinetic Monte Carlo Model of Ionic Conduction in Bulk Yttria-stabilized Zirconia Eunseok in bulk single crystal Yttria-stabilized Zirconia. An interacting energy barrier model is developed dynamics to simulate the vacancy diffusion in Yttria-stabilized Zirconia (YSZ). They concluded

  4. Free energy analysis of vesicle-to-bicelle transformation Wataru Shinoda,*ab

    E-Print Network [OSTI]

    Nielsen, Steven O.

    Free energy analysis of vesicle-to-bicelle transformation Wataru Shinoda,*ab Takenobu Nakamuraab a series of coarse-grained molecular dynamics simulations, we evaluate the free energy profile for the transformation of a small vesicle to a disk-like structure called a bicelle. This free energy is found

  5. An accurate ab initio quartic force field and vibrational frequencies for CH4 and isotopomers

    E-Print Network [OSTI]

    Martin, Jan M.L.

    SBG, Limburgs Universitair Centrum. Universitaire Campus, B-3590, Diepenbeek, Belgium, and Department of Chemistry, University of Antwerp (UIA), Universiteitsplein 1, B-2610 Wilrijk, Belgium Peter R. Taylor San of Physics. I. INTRODUCTION In the last few years, we have been involved in deter- mining very accurate ab

  6. Atomic and electronic structure of acetic acid on Ge(100) Do Hwan Kim a,b

    E-Print Network [OSTI]

    Kim, Sehun

    Atomic and electronic structure of acetic acid on Ge(100) Do Hwan Kim a,b , Eunkyung Hwang to investigate the atomic and electronic structure of acetic acid adsorbed on Ge(100) surface. Due to its acidity, acetic acid dissociates and the resulting electron-rich acetate group reacts with the electron

  7. From ab initio quantum chemistry to molecular dynamics: The delicate case of hydrogen bonding in ammonia

    E-Print Network [OSTI]

    Martin, Jan M.L.

    energies of this nonlinear hydrogen bond. We present a novel density functional, HCTH/407 , which leads to two equivalent ``hydrogen bonding contacts,'' is extremely close in energy on an overall flatFrom ab initio quantum chemistry to molecular dynamics: The delicate case of hydrogen bonding

  8. Augmenting CT Cardiac Roadmaps with Segmented Streaming Qi Duan a,b

    E-Print Network [OSTI]

    Augmenting CT Cardiac Roadmaps with Segmented Streaming Ultrasound Qi Duan a,b , Guy Shechter Static X-ray computed tomography (CT) volumes are often used as anatomic roadmaps during catheter. Augmenting these static CT roadmaps with segmented myocardial borders extracted from live ultrasound (US

  9. Hybrid formation control of the Unmanned Aerial Vehicles Ali Karimoddini a,b

    E-Print Network [OSTI]

    Benmei, Chen

    Hybrid formation control of the Unmanned Aerial Vehicles Ali Karimoddini a,b , Hai Lin b, , Ben M December 2010 Keywords: Unmanned Aerial Vehicles (UAVs) Formation control Hybrid supervisory control Polar partitioning a b s t r a c t An essential issue in the formation control of Unmanned Aerial Vehicles (UAVs

  10. AB 758 COMPREHENSIVE ENERGY EFFICIENCY PROGRAM FOR EXISTING RESIDENTIAL AND NONRESIDENTIAL BUILDINGS

    E-Print Network [OSTI]

    homes energy efficient through Title 24 Part 6 Building Energy Efficiency Standards (Standards for Energy Efficiency in Existing Buildings (AB 549 Report), the Energy Commission made a series to existing buildings, disclosure of home energy ratings at point- of-sale, expansion of whole-building

  11. Advances in the ab initio description of nuclear three-cluster systems

    E-Print Network [OSTI]

    Romero-Redondo, Carolina; Navrátil, Petr; Hupin, Guillaume

    2015-01-01

    We introduce the extension of the ab initio no-core shell model with continuum to describe three-body cluster systems. We present results for the ground state of 6He and show improvements with respect to the description obtained within the no-core shell model and the no-core shell model/resonating group methods.

  12. Mixed-mode fracture of human cortical bone Elizabeth A. Zimmermann a,b

    E-Print Network [OSTI]

    Ritchie, Robert

    Mixed-mode fracture of human cortical bone Elizabeth A. Zimmermann a,b , Maximilien E. Launey Available online 1 July 2009 Keywords: Human cortical bone Mixed-mode fracture Fracture toughness Fracture mechanisms a b s t r a c t Although the mode I (tensile opening) fracture toughness has been the focus

  13. New approaches to measuring biochar density and Catherine E. Brewer a,b,

    E-Print Network [OSTI]

    Gonnermann, Helge

    : Brewer CE, et al., New approaches to measuring biochar density and porosity, Biomass and Bioenergy (2014New approaches to measuring biochar density and porosity Catherine E. Brewer a,b, *, Victoria J Accepted 26 March 2014 Available online xxx Keywords: Biochar Skeletal density Envelope density Pore volume

  14. LATTICE POLYMER AUTOMATA Steen RASMUSSEN a;b and Joshua R. SMITH b;c

    E-Print Network [OSTI]

    LATTICE POLYMER AUTOMATA Steen RASMUSSEN a;b and Joshua R. SMITH b;c a TSA­DO/SA MS M997 and CNLS, the Lattice Polymer Automaton [LPA]. In the LPA all interactions, including electromagnetic forces, the molecular excluded volume forces, the longer range intermolecular forces, and the polymer

  15. 17.March.2005 C. A. Martins, CERN AB/PO 1 Power converter

    E-Print Network [OSTI]

    McDonald, Kirk

    , 1000Vdc Converter topology 18 kV cell Power transformers (in an oil tank) 2x4 Rectifier bridges Passive Passive filter self Passive filter capacitors self capacitors DC output #12;17.March.2005 C. A. Martins Converters location: · At building 193 (AD) like ALICE/LHCb converter 2nd choice target Power converter (193

  16. DC WRRC Report No. 127 GROUND WATER RESOURCE ASSESSMENT STUDY FOR

    E-Print Network [OSTI]

    District of Columbia, University of the

    project: James Collier - DCRA Water Resources Management Division Mohsin Siddique - DCRA Water Quality DRILLING AND FIELD OPERATIONS REPORT FOR THE GROUP B WELLS D.C. WATER RESOURCES RESEARCH CENTER University: Well Drilling and Field Operations Report - Group B Wells DATE: July 1993 AUTHOR(S): Jutta Schneider

  17. Strontium Titanate DC Electric Field Switchable and Tunable Bulk Acoustic Wave Solidly Mounted Resonator

    E-Print Network [OSTI]

    York, Robert A.

    Strontium Titanate DC Electric Field Switchable and Tunable Bulk Acoustic Wave Solidly Mounted.3 0/0. Index Terms - Acoustic resonators, bulk acoustic wave devices, delay filters, ferroelectric,4] that can be exploited to realize voltage-switchable bulk-acoustic wave (BAW) devices for RF applications [5

  18. dc electric field tunable bulk acoustic wave solidly mounted resonator using SrTiO3

    E-Print Network [OSTI]

    York, Robert A.

    dc electric field tunable bulk acoustic wave solidly mounted resonator using SrTiO3 G. N. SaddikTiO3 solidly mounted bulk acoustic wave resonator has been designed, fabricated, and tested of Physics. DOI: 10.1063/1.2759464 Thin film bulk acoustic wave resonators FBARs have been in use by research

  19. SEC Training -Risk Management Washington, D.C., February 27, 2006

    E-Print Network [OSTI]

    Frey, Robert J.

    SEC Training - Risk Management Washington, D.C., February 27, 2006 Robert J. Frey, Ph.D. Director Managers, pp. IV-3 to IV-9 · Market Risk · Liquidity Risk · Credit Risk · Leverage Risk · Operational Risk · Valuation Risk 10 #12;Monitoring Risk Source: MFA's 2005 Sound Practices for Hedge Fund Managers, pp. AI-1

  20. DC 20 a,f,g AXISYMMETRIC INSTABILITY IN A NONCIRCDLAR TOKAMAK

    E-Print Network [OSTI]

    Sprott, Julien Clinton

    DC 20 a,f,g AXISYMMETRIC INSTABILITY IN A NONCIRCDLAR TOKAMAK: EXPERIMENT AND THEORY BY B, a tokamak with a four-null poloidal divertor. Experi mental results are clo sely compared with stability indicates #12;AXISYMMETRIC INSTABILITY IN A NONCIRCULAR TOKAMAK: EXPERIMENT AND THEORY by B. Lipschultz

  1. Design and Verification of Smart and Scalable DC Microgrids for Emerging Regions

    E-Print Network [OSTI]

    Sanders, Seth

    in grid power: A droop voltage power-sharing scheme is implemented, wherein the microgrid voltage droops transmission and distributed storage. Since the PMUs will be able to communicate digitally to the power stationDesign and Verification of Smart and Scalable DC Microgrids for Emerging Regions P. Achintya

  2. February 2012 Did you know that the Navy Memorial in Washington D.C. is

    E-Print Network [OSTI]

    February 2012 004/12 Did you know that the Navy Memorial in Washington D.C. is is honoring all://navymemorial.org/yotc/Home/tabid/224/Default.aspx Challenge to all: in the Navy Log. This is your free opportunity to be entered and activities occurring across our Navy to support YOTC through this Facebook page: http

  3. November 2002 15th TOFE, Washington, D.C. 1 Thermal Behavior and Operating

    E-Print Network [OSTI]

    Raffray, A. René

    - Enthalpy transfer - Condensation (latent heat transfer) in the case of gas with boiling point and melting of condensation. - Latent heats have only a small effect on the overall energy transfer which is governed, Washington, D.C. 7 Radiation Heat Transfer from Chamber Wall · Simple estimate given by: Where: Tw

  4. IEEE Photovoltaic Specialists Conference Washington, D.C., May 13-17, 1996

    E-Print Network [OSTI]

    Perez, Richard R.

    IEEE Photovoltaic Specialists Conference Washington, D.C., May 13-17, 1996 NICHE MARKETS FOR GRID-CONNECTED PHOTOVOLTAICS Howard Wenger Pacific Energy Group Walnut Creek, CA, USA Christy Herig & Roger Taylor National- Sited Photovoltaics (CSPV) in the United States. 1 The intent is to demonstrate markets that are cost

  5. IMPLEMENTATION OF A DC BUMP AT THE STORAGE RING INJECTION STRAIGHT SECTION

    SciTech Connect (OSTI)

    Wang, G.M.; Shaftan, T.; Kramer, S.K.; Fliller, R.; Guo, W.; Heese, R.; Yu, L.H.; Parker, B.; Willeke, F.J.

    2011-03-28

    The NSLS II beam injection works with a DC septum, a pulsed septum and four fast kicker magnets. The kicker power supplies each produce a two revolution period pulsed field, 5.2 {micro}s half sine waveform, using {approx}5kA drive voltage. The corresponding close orbit bump amplitude is {approx}15mm. It is desired that the bump is transparent to the users for top-off injection. However, high voltage and short pulse power supplies have challenges to maintain pulse-to-pulse stability and magnet-to-magnet reproducibility. To minimize these issues, we propose implementing a DC local bump on top of the fast bump to reduce the fast kicker strength by a factor of 2/3. This bump uses two storage ring corrector magnets plus one additional magnet at the septum to create a local bump. Additionally, these magnets could provide a DC bump to simulate the septum position effects on the store beam lifetime. This paper presents the detail design of this DC injection bump and related beam dynamics.

  6. Diagnostics of ballistic electrons in a dc/rf hybrid capacitively coupled discharge

    E-Print Network [OSTI]

    Economou, Demetre J.

    Diagnostics of ballistic electrons in a dc/rf hybrid capacitively coupled discharge Lin Xu,1,a Lee the substrate electrode or the semiconduc- tor wafer. Watanabe et al.7 superimposed a high energy electron beam. Economou,2,c and Vincent M. Donnelly2,d 1 Tokyo Electron America, Austin, Texas 78741, USA 2 Department

  7. The ecological causes of evolution Andrew D.C. MacColl

    E-Print Network [OSTI]

    Obbard, Darren

    The ecological causes of evolution Andrew D.C. MacColl School of Biology, University of Nottingham, but it is not the cause of evolution. The cause of natural selection and, therefore, of adaptive evolution, is any of species and their response to environmental change. What causes natural selection? When one contemplates

  8. 1. PMU Based RAS for a Hybrid AC/DC System 1.1. Project Team

    E-Print Network [OSTI]

    Li, Husheng

    1. PMU Based RAS for a Hybrid AC/DC System 1.1. Project Team Primary Thrust: Modeling Secondary to be detected more quickly allowing less severe action. This effort focuses on PMU driven response-based RAS from PMU units. The project goals break down into three efforts: · Investigating the possibility

  9. Living downtown in Washington, D.C. : defining residential community in the city center

    E-Print Network [OSTI]

    Allen, Robin P. (Robin Porter)

    1995-01-01

    In Washington D.C., as in many other American cities, a significant section of the downtown is distinguished by boarded-up buildings and vacant lots. In spite of traces of a city plan that could organize and accommodate a ...

  10. Chapter 6.7 Edwards Auto 306 DC and RF Sputter Coater

    E-Print Network [OSTI]

    Healy, Kevin Edward

    mechanical pump is installed for rough pumping and one turbo pump for fine pumping. A crystal monitor on it to assure good seal of the chamber. 4.2 Control Panel: Allows you to vent and pump the chamber. 4.3 DC power over 30 years of your career. 5.4 Wear light blue vacuum gloves when you handle components

  11. CTMCONTROL: Addressing the MC/DC Objective for Safety-Critical Automotive Software

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , testing, MC/DC, ISO 26262, AUTOSAR. 1 INTRODUCTION ISO 26262 [1] is one of the main points of reference-critical software. AUTOSAR, since release 4.0 in 2011 [2], refers to the demands of ISO 26262 for safety A (most critical) software for airborne systems before they can receive an official approval/certification

  12. DC Discharge Studies Using PIC-MCC: Unmagnetized Glow Discharge Theory Jeff Hammel & John Verboncoeur

    E-Print Network [OSTI]

    Wurtele, Jonathan

    DC Discharge Studies Using PIC-MCC: Unmagnetized Glow Discharge Theory Jeff Hammel & John Wiley and Sons, Inc., New York, 1994. · Leonard B. Loeb. Fundamental Processes of Electrical Discharge. Verboncoeur, A. B. Langdon, and N. T. Gladd. An object-oriented electromagnetic pic code. Computer Physics

  13. Use of Facility Contractor Employees for Services to DOE in the Washington, D.C., Area

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

    2001-07-12

    To clarify and modify policies and procedures for management of Department of Energy (DOE), including National Nuclear Security Administration (NNSA), facility contractor employees located in the Washington, D.C., area. Cancels DOE N 350.5. Certified 12-28-06. Canceled by DOE O 350.2A.

  14. Bi-directional Current-fed Medium Frequency Transformer Isolated AC-DC Converter 

    E-Print Network [OSTI]

    Essakiappan, Somasundaram

    2011-08-08

    demand for power converters with bi-directional capabilities. The objective of this thesis is to develop a high power quality, bi-directional AC-DC power converter that is a solution to the aforementioned problems. This thesis studies an existing topology...

  15. New World Monkeys Alfred L Rosenberger, Smithsonian Institution, Washington DC, USA

    E-Print Network [OSTI]

    Rosenberger, Alfred H.

    New World Monkeys Alfred L Rosenberger, Smithsonian Institution, Washington DC, USA Walter Carl Hartwig,Touro University College of Osteopathic Medicine, Vallejo, California, USA New World monkeys are the living (nonhuman) primates of South and Central America. Introduction New World monkeys are distributed

  16. New Global Alliance Formed to Undercut Illegal WASHINGTON, DC, May 26, 2010 (ENS) -To reduce trade

    E-Print Network [OSTI]

    New Global Alliance Formed to Undercut Illegal Logging WASHINGTON, DC, May 26, 2010 (ENS with a stake in promoting legal forest product supply chains. The Forest Legality Alliance aims to achieve products and increasing the capacity of suppliers to deliver legal wood and paper. "The Alliance seeks

  17. Joint two-dimensional DC resistivity and seismic travel time inversion with cross-gradients constraints

    E-Print Network [OSTI]

    Meju, Max

    Joint two-dimensional DC resistivity and seismic travel time inversion with cross to evaluate the structural features common to both methods. The cross-gradients function is incorporated method. The resultant iterative two-dimensional (2-D) joint inversion scheme is successfully applied

  18. Operation of the DC current transformer intensity monitors at FNAL during run II

    SciTech Connect (OSTI)

    Crisp, J.; Fellenz, B.; Heikkinen, D.; Ibrahim, M.A.; Meyer, T.; Vogel, G.; /Fermilab

    2012-01-01

    Circulating beam intensity measurements at FNAL are provided by five DC current transformers (DCCT), one per machine. With the exception of the DCCT in the Recycler, all DCCT systems were designed and built at FNAL. This paper presents an overview of both DCCT systems, including the sensor, the electronics, and the front-end instrumentation software, as well as their performance during Run II.

  19. Control of a Fuel-Cell Powered DC Electric Vehicle Motor Federico Zenith

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Control of a Fuel-Cell Powered DC Electric Vehicle Motor Federico Zenith Sigurd Skogestad Introduction Research in fuel cells receives currently a lot of interest. Fuel cells can be used, in different. However, the dynamics of fuel cells has received comparatively less attention. Control of fuel cells

  20. Navier-Stokes on Black Hole Horizons and DC Thermoelectric Conductivity

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2015-11-12

    Within the context of the AdS/CFT correspondence we show that the DC thermoelectric conductivity can be obtained by solving the linearised, time-independent and forced Navier-Stokes equations on the black hole horizon for an incompressible and charged fluid.

  1. Navier-Stokes on Black Hole Horizons and DC Thermoelectric Conductivity

    E-Print Network [OSTI]

    Donos, Aristomenis

    2015-01-01

    We consider a general class of black hole solutions of Einstein-Maxwell theory which are holographically dual to CFTs with spatially dependent sources. We show that an averaged DC thermoelectric conductivity matrix can be obtained by solving the forced, linearised, time-independent Navier-Stokes equations on the black hole horizon for an incompressible and charged fluid.

  2. EVIDENCE FOR RADIOGENIC SULFUR-32 IN TYPE AB PRESOLAR SILICON CARBIDE GRAINS?

    SciTech Connect (OSTI)

    Fujiya, Wataru; Hoppe, Peter [Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, D-55128 Mainz (Germany)] [Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, D-55128 Mainz (Germany); Zinner, Ernst [Laboratory for Space Sciences and Physics Department, Campus Box 1105, Washington University, St. Louis, MO 63130 (United States)] [Laboratory for Space Sciences and Physics Department, Campus Box 1105, Washington University, St. Louis, MO 63130 (United States); Pignatari, Marco [Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland)] [Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland); Herwig, Falk, E-mail: wataru.fujiya@mpic.de, E-mail: peter.hoppe@mpic.de, E-mail: ekz@wustl.edu, E-mail: mpignatari@gmail.com, E-mail: fherwig@uvic.ca [Department of Physics and Astronomy, University of Victoria, Canada, P.O. Box 3055, Victoria, BC V8W 3P6 (Canada)] [Department of Physics and Astronomy, University of Victoria, Canada, P.O. Box 3055, Victoria, BC V8W 3P6 (Canada)

    2013-10-20

    We report C, Si, and S isotope measurements on 34 presolar silicon carbide grains of Type AB, characterized by {sup 12}C/{sup 13}C < 10. Nitrogen, Mg-Al-, and Ca-Ti-isotopic compositions were measured on a subset of these grains. Three grains show large {sup 32}S excesses, a signature that has been previously observed for grains from supernovae (SNe). Enrichments in {sup 32}S may be due to contributions from the Si/S zone and the result of S molecule chemistry in still unmixed SN ejecta or due to incorporation of radioactive {sup 32}Si from C-rich explosive He shell ejecta. However, a SN origin remains unlikely for the three AB grains considered here, because of missing evidence for {sup 44}Ti, relatively low {sup 26}Al/{sup 27}Al ratios (a few times 10{sup –3}), and radiogenic {sup 32}S along with low {sup 12}C/{sup 13}C ratios. Instead, we show that born-again asymptotic giant branch (AGB) stars that have undergone a very-late thermal pulse (VLTP), known to have low {sup 12}C/{sup 13}C ratios and enhanced abundances of the light s-process elements, can produce {sup 32}Si, which makes such stars attractive sources for AB grains with {sup 32}S excesses. This lends support to the proposal that at least some AB grains originate from born-again AGB stars, although uncertainties in the born-again AGB star models and possible variations of initial S-isotopic compositions in the parent stars of AB grains make it difficult to draw a definitive conclusion.

  3. The GeorGe WashinGTon UniversiTy | WashinGTon DC The Elliott School's M.A. program in International Affairs

    E-Print Network [OSTI]

    Larsen, Mike

    The GeorGe WashinGTon UniversiTy | WashinGTon DC Overview The Elliott School's M.A. program affairs. Students can take advantage of numerous internship opportunities in the Washington, DC, area to pursue daytime internships in the Washington, DC, metropolitan area. Master of arts in international

  4. DRAFT of Klahr, D. (2012) Patterns, Rules, & Discoveries in Life and in Science. In Carver, S., & Shrager, J..(Eds.) The Journey From Child to Scientist: Integrating Cognitive Development and the Education Sciences. Washington DC: American Psychological A

    E-Print Network [OSTI]

    Klahr, David

    2012-01-01

    Development and the Education Sciences. Washington DC: American Psychological Association 2 ingenious and the Education Sciences. Washington DC: American Psychological Association 1 Patterns, Rules, & Discoveries

  5. Ab-initio molecular dynamics simulation of liquid water by Quantum Monte Carlo

    E-Print Network [OSTI]

    Andrea Zen; Ye Luo; Guglielmo Mazzola; Leonardo Guidoni; Sandro Sorella

    2015-04-21

    Although liquid water is ubiquitous in chemical reactions at roots of life and climate on the earth, the prediction of its properties by high-level ab initio molecular dynamics simulations still represents a formidable task for quantum chemistry. In this article we present a room temperature simulation of liquid water based on the potential energy surface obtained by a many-body wave function through quantum Monte Carlo (QMC) methods. The simulated properties are in good agreement with recent neutron scattering and X-ray experiments, particularly concerning the position of the oxygen-oxygen peak in the radial distribution function, at variance of previous Density Functional Theory attempts. Given the excellent performances of QMC on large scale supercomputers, this work opens new perspectives for predictive and reliable ab-initio simulations of complex chemical systems.

  6. Operator evolution for ab initio electric dipole transitions of 4He

    E-Print Network [OSTI]

    Micah D. Schuster; Sofia Quaglioni; Calvin W. Johnson; Eric D. Jurgenson; Petr Navratil

    2015-04-02

    A goal of nuclear theory is to make quantitative predictions of low-energy nuclear observables starting from accurate microscopic internucleon forces. A major element of such an effort is applying unitary transformations to soften the nuclear Hamiltonian and hence accelerate the convergence of ab initio calculations as a function of the model space size. The consistent simultaneous transformation of external operators, however, has been overlooked in applications of the theory, particularly for nonscalar transitions. We study the evolution of the electric dipole operator in the framework of the similarity renormalization group method and apply the renormalized matrix elements to the calculation of the 4He total photoabsorption cross section and electric dipole polarizability. All observables are calculated within the ab initio no-core shell model. We find that, although seemingly small, the effects of evolved operators on the photoabsorption cross section are comparable in magnitude to the correction produced by including the chiral three-nucleon force and cannot be neglected.

  7. Bridging a gap between continuum-QCD and ab initio predictions of hadron observables

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

    Binosi, Daniele; Chang, Lei; Papavassiliou, Joannis; Roberts, Craig D.

    2015-03-01

    Within contemporary hadron physics there are two common methods for determining the momentum- dependence of the interaction between quarks: the top-down approach, which works toward an ab initiocomputation of the interaction via direct analysis of the gauge-sector gap equations; and the bottom-up scheme, which aims to infer the interaction by fitting data within a well-defined truncation of those equations in the matter sector that are relevant to bound-state properties. We unite these two approaches by demonstrating that the renormalisation-group-invariant running-interaction predicted by contemporary analyses of QCD’s gauge sector coincides with that required in order to describe ground-state hadron observables usingmore »a nonperturbative truncation of QCD’s Dyson–Schwinger equations in the matter sector. This bridges a gap that had lain between nonperturbative continuum-QCD and the ab initio prediction of bound-state properties.« less

  8. Bridging a gap between continuum-QCD and ab initio predictions of hadron observables

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

    Binosi, Daniele; Chang, Lei; Papavassiliou, Joannis; Roberts, Craig D.

    2015-01-23

    Within contemporary hadron physics there are two common methods for determining the momentum-dependence of the interaction between quarks: the top-down approach, which works toward an ab initio computation of the interaction via direct analysis of the gauge-sector gap equations; and the bottom-up scheme, which aims to infer the interaction by fitting data within a well-defined truncation of those equations in the matter sector that are relevant to bound-state properties. We unite these two approaches by demonstrating that the renormalisation-group-invariant running-interaction predicted by contemporary analyses of QCD’s gauge sector coincides with that required in order to describe ground-state hadron observables usingmore »a nonperturbative truncation of QCD’s Dyson–Schwinger equations in the matter sector. This bridges a gap that had lain between nonperturbative continuum-QCD and the ab initio prediction of bound-state properties.« less

  9. Homogeneous comparison of directly detected planet candidates: GQ Lup, 2M1207, AB Pic

    E-Print Network [OSTI]

    Ralph Neuhaeuser

    2005-09-30

    We compile the observational evidence for the three recently presented planet candidates imaged directly and derive in a homogeneous way their temperatures and masses. For both AB Pic b and 2M1207 b, we derive a larger temperature range than in Chauvin et al. (2004, 2005b). AB Pic b appears to be quite similar as GQ Lup b, but older. According to the Tucson and Lyon models, all three companions could either be planets or brown dwarfs. According to the Wuchterl formation model, the masses seem to be below the D burning limit. We discuss whether the three companions can be classified as planets, and whether the three systems are gravitationally bound and long-term stable.

  10. Ab-initio Gorkov-Green's function calculations of open-shell nuclei

    E-Print Network [OSTI]

    V. Soma; C. Barbieri; T. Duguet

    2012-08-13

    We present results from a new ab-initio method that uses the self-consistent Gorkov Green's function theory to address truly open-shell systems. The formalism has been recently worked out up to second order and is implemented here in nuclei for the first time on the basis of realistic nuclear forces. We find good convergence of the results with respect to the basis size in Ca44 and Ni74 and discuss quantities of experimental interest including ground-state energies, pairing gaps and particle addition/removal spectroscopy. These results demonstrate that the Gorkov method is a valid alternative to multireference approaches for tackling degenerate or near degenerate quantum systems. In particular, it increases the number of mid-mass nuclei accessible in an ab-initio fashion from a few tens to a few hundreds.

  11. Carbon monoxide-assisted growth of carbon nanotubes Y.H. Tang a,b

    E-Print Network [OSTI]

    Zheng, Yufeng

    diameter of 30 nm and 20 layers. Nickel was observed in the tips of the nanotubes and played a crucial roleCarbon monoxide-assisted growth of carbon nanotubes Y.H. Tang a,b , Y.F. Zheng a , C.S. Lee a , N was used to synthesize carbon nanotubes (CNTs) in a hot-®lament chemical vapor deposition (HFCVD) system

  12. Quantum Oscillator on $\\DC P^n$ in a constant magnetic field

    E-Print Network [OSTI]

    Stefano Bellucci; Armen Nersessian; Armen Yeranyan

    2004-06-22

    We construct the quantum oscillator interacting with a constant magnetic field on complex projective spaces $\\DC P^N$, as well as on their non-compact counterparts, i. e. the $N-$dimensional Lobachewski spaces ${\\cal L}_N$. We find the spectrum of this system and the complete basis of wavefunctions. Surprisingly, the inclusion of a magnetic field does not yield any qualitative change in the energy spectrum. For $N>1$ the magnetic field does not break the superintegrability of the system, whereas for N=1 it preserves the exact solvability of the system. We extend this results to the cones constructed over $\\DC P^N$ and ${\\cal L}_N$, and perform the (Kustaanheimo-Stiefel) transformation of these systems to the three-dimensional Coulomb-like systems.

  13. Demonstration of Cathode Emittance Dominated High Bunch Charge Beams in a DC gun-based Photoinjector

    E-Print Network [OSTI]

    Gulliford, Colwyn; Bazarov, Ivan; Dunham, Bruce; Cultrera, Luca

    2015-01-01

    We present the results of transverse emittance and longitudinal current profile measurements of high bunch charge (greater than or equal to 100 pC) beams produced in the DC gun-based Cornell Energy Recovery Linac Photoinjector. In particular, we show that the cathode thermal and core beam emittances dominate the final 95% and core emittance measured at 9-9.5 MeV. Additionally, we demonstrate excellent agreement between optimized 3D space charge simulations and measurement, and show that the quality of the transverse laser distribution limits the optimal simulated and measured emittances. These results, previously thought achievable only with RF guns, demonstrate that DC gun based photoinjectors are capable of delivering beams with sufficient single bunch charge and beam quality suitable for many current and next generation accelerator projects such as Energy Recovery Linacs (ERLs) and Free Electron Lasers (FELs).

  14. Metastability in a nano-bridge based hysteretic DC-SQUID embedded in superconducting microwave resonator

    E-Print Network [OSTI]

    Eran Segev; Oren Suchoi; Oleg Shtempluck; Fei Xue; Eyal Buks

    2010-07-29

    We study the metastable response of a highly hysteretic DC-SQUID made of a Niobium loop interrupted by two nano-bridges. We excite the SQUID with an alternating current and with direct magnetic flux, and find different stability zones forming diamond-like structures in the measured voltage across the SQUID. When such a SQUID is embedded in a transmission line resonator similar diamond structures are observed in the reflection pattern of the resonator. We have calculated the DC-SQUID stability diagram in the plane of the exciting control parameters, both analytically and numerically. In addition, we have obtained numerical simulations of the SQUID equations of motion, taking into account temperature variations and non-sinusoidal current-phase relation of the nano-bridges. Good agreement is found between experimental and theoretical results.

  15. Demonstration of cathode emittance dominated high bunch charge beams in a DC gun-based photoinjector

    SciTech Connect (OSTI)

    Gulliford, Colwyn Bartnik, Adam Bazarov, Ivan; Dunham, Bruce; Cultrera, Luca

    2015-03-02

    We present the results of transverse emittance and longitudinal current profile measurements of high bunch charge (?100 pC) beams produced in the DC gun-based Cornell energy recovery linac photoinjector. In particular, we show that the cathode thermal and core beam emittances dominate the final 95% and core emittances measured at 9–9.5?MeV. Additionally, we demonstrate excellent agreement between optimized 3D space charge simulations and measurement, and show that the quality of the transverse laser distribution limits the optimal simulated and measured emittances. These results, previously thought achievable only with RF guns, demonstrate that DC gun based photoinjectors are capable of delivering beams with sufficient single bunch charge and beam quality suitable for many current and next generation accelerator projects such as Energy Recovery Linacs and Free Electron Lasers.

  16. Effect of alkali addition on DC conductivity and thermal properties of vanadium-bismo-borate glasses

    SciTech Connect (OSTI)

    Khasa, S., E-mail: skhasa@rediff.com; Dahiya, M. S., E-mail: skhasa@rediff.com [Physics Department, Deenbandhu Chhotu Ram University of Science and Technology, Murthal-131039 (India); Agarwal, A. [Physics Department, Guru Jambheshwara University of Science and Technology, Hisar-125001 (India)

    2014-04-24

    The DC Conductivity and Differential Thermal Analysis of glasses with composition (30?x)Li{sub 2}O?xV{sub 2}O{sub 5}?20Bi{sub 2}O{sub 3}?50B{sub 2}O{sub 3}(x=15, 10, 5) has been carried out in order to study the effect of replacing the Transition Metal Oxide (TMO) with alkali oxide. A significant increase in the DC conductivity has been observed with increase in alkali content. Again the thermal measurements have shown the decrease in both glass transition temperature (T{sub g}) and crystallization temperature (T{sub x}). The Glass Stability (GS) and Glass Forming Ability (GFA) have also been calculated and these also were found to decrease with increase in alkali oxide content at the cost of TMO.

  17. Time series analysis of ionization waves in dc neon glow discharge

    SciTech Connect (OSTI)

    Hassouba, M. A.; Al-Naggar, H. I.; Al-Naggar, N. M.; Wilke, C. [Department of Physics, Faculty of Science, Benha University (Egypt); Institute of Physics, E. M. A. University, Domstrasse 10a, 17489 Greifswald (Germany)

    2006-07-15

    The dynamics of dc neon glow discharge is examined by calculating a Lyapunov exponent spectrum (LES) and correlation dimension (D{sub corr}) from experimental time series. The embedding theory is used to reconstruct an attractor with the delay coordinate method. The analysis refers to periodic, chaotic, and quasi-periodic attractors. The results obtained are confirmed by a comparison with other methods of time series analysis such as the Fourier power spectrum and autocorrelation function. The main object of the present work is the positive column of a dc neon glow discharge. The positive column is an excellent model for the study of a non-linearity plasma system because it is nonisothermal plasma far from equilibrium.

  18. Ions in solution: Density corrected density functional theory (DC-DFT)

    SciTech Connect (OSTI)

    Kim, Min-Cheol; Sim, Eunji; Burke, Kieron

    2014-05-14

    Standard density functional approximations often give questionable results for odd-electron radical complexes, with the error typically attributed to self-interaction. In density corrected density functional theory (DC-DFT), certain classes of density functional theory calculations are significantly improved by using densities more accurate than the self-consistent densities. We discuss how to identify such cases, and how DC-DFT applies more generally. To illustrate, we calculate potential energy surfaces of HO·Cl{sup ?} and HO·H{sub 2}O complexes using various common approximate functionals, with and without this density correction. Commonly used approximations yield wrongly shaped surfaces and/or incorrect minima when calculated self consistently, while yielding almost identical shapes and minima when density corrected. This improvement is retained even in the presence of implicit solvent.

  19. Ab initio molecular dynamics simulation of pressure-induced phase transformation of BeO

    SciTech Connect (OSTI)

    Xiao, H. Y.; Duan, G.; Zu, X. T.; Weber, W. J.

    2011-05-05

    Ab initio molecular dynamics (MD) method has been used to study high pressure-induced phase transformation in BeO based on the local density approximation (LDA) and the generalized gradient approximation (GGA). Both methods show that the wurtzite (WZ) and zinc blende (ZB) BeO transforms to the rocksalt (RS) structure smoothly at high pressure. The transition pressures obtained from the LDA method are about 40 GPa larger than the GGA result for both WZ ? RS and ZB ? RS phase transformations, and the phase transformation mechanisms revealed by the LDA and GGA methods are different. For WZ ? RS phase transformations both mechanisms obtained from the LDA and GGA methods are not comparable to the previous ab initio MD simulations of WZ BeO at 700 GPa based on the GGA method. It is suggested that the phase transformation mechanisms of BeO revealed by the ab initio MD simulations are affected remarkably by the exchange–correlation functional employed and the way of applying pressure.

  20. AN IONIZED OUTFLOW FROM AB AUR, A HERBIG AE STAR WITH A TRANSITIONAL DISK

    SciTech Connect (OSTI)

    Rodríguez, Luis F.; Zapata, Luis A.; Ortiz-León, Gisela N.; Loinard, Laurent [Centro de Radioastronomía y Astrofísica, UNAM, Apdo. Postal 3-72 (Xangari), 58089 Morelia, Michoacán (Mexico); Dzib, Sergio A. [Max Planck Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn (Germany); Macías, Enrique; Anglada, Guillem, E-mail: l.rodriguez@crya.unam.mx [Instituto de Astrofísica de Andalucía (CSIC), Apartado 3004, E-18080 Granada (Spain)

    2014-09-20

    AB Aur is a Herbig Ae star with a transitional disk. Transitional disks present substantial dust clearing in their inner regions, most probably because of the formation of one or more planets, although other explanations are still viable. In transitional objects, accretion is found to be about an order of magnitude smaller than in classical full disks. Since accretion is believed to be correlated with outflow activity, centimeter free-free jets are expected to be present in association with these systems, at weaker levels than in classical protoplanetary (full) systems. We present new observations of the centimeter radio emission associated with the inner regions of AB Aur and conclude that the morphology, orientation, spectral index, and lack of temporal variability of the centimeter source imply the presence of a collimated, ionized outflow. The radio luminosity of this radio jet is, however, about 20 times smaller than that expected for a classical system of similar bolometric luminosity. We conclude that centimeter continuum emission is present in association with stars with transitional disks, but at levels than are becoming detectable only with the upgraded radio arrays. On the other hand, assuming that the jet velocity is 300 km s{sup –1}, we find that the ratio of mass loss rate to accretion rate in AB Aur is ?0.1, similar to that found for less evolved systems.

  1. Accelerating ab initio path integral molecular dynamics with multilevel sampling of potential surface

    E-Print Network [OSTI]

    Hua Y. Geng

    2014-12-19

    A multilevel approach to sample the potential energy surface in a path integral formalism is proposed. The purpose is to reduce the required number of ab initio evaluations of energy and forces in ab initio path integral molecular dynamics (AI-PIMD) simulation, without compromising the overall accuracy. To validate the method, the internal energy and free energy of an Einstein crystal are calculated and compared with the analytical solutions. As a preliminary application, we assess the performance of the method in a realistic model, the FCC phase of dense atomic hydrogen, in which the calculated result shows that the acceleration rate is about 3 to 4 fold for a two-level implementation, and can be increased to 10 times if extrapolation is used. With only 16 beads used for the ab initio potential sampling, this method gives a well converged internal energy. The residual error in pressure is just about 3 GPa, whereas it is about 20 GPa for a plain AI-PIMD calculation with the same number of beads. The vibrational free energy of the FCC phase of dense hydrogen at 300 K is also calculated with an AI-PIMD thermodynamic integration method, which gives a result of about 0.51 eV/proton at a density of $r_{s}=0.912$.

  2. The RCK Domain of the KtrAB K+ Transporter: Multiple Conformations of an Octameric Ring

    SciTech Connect (OSTI)

    Albright,R.; Vazquez Ibar, J.; Kim, C.; Gruner, S.; Morais-Cabral, J.

    2006-01-01

    The KtrAB ion transporter is a complex of the KtrB membrane protein and KtrA, an RCK domain. RCK domains regulate eukaryotic and prokaryotic membrane proteins involved in K{sup +} transport. Conflicting functional models have proposed two different oligomeric arrangements for RCK domains, tetramer versus octamer. Our results for the KtrAB RCK domain clearly show an octamer in solution and in the crystal. We determined the structure of this protein in three different octameric ring conformations that resemble the RCK-domain octamer observed in the MthK potassium channel but show striking differences in size and symmetry. We present experimental evidence for the association between one RCK octameric ring and two KtrB membrane proteins. These results provide insights into the quaternary organization of the KtrAB transporter and its mechanism of activation and show that the RCK-domain octameric ring model is generally applicable to other ion-transport systems.

  3. Method of measuring the dc electric field and other tokamak parameters

    DOE Patents [OSTI]

    Fisch, Nathaniel J. (Princeton, NJ); Kirtz, Arnold H. (Princeton Junction, NJ)

    1992-01-01

    A method including externally imposing an impulsive momentum-space flux to perturb hot tokamak electrons thereby producing a transient synchrotron radiation signal, in frequency-time space, and the inference, using very fast algorithms, of plasma parameters including the effective ion charge state Z.sub.eff, the direction of the magnetic field, and the position and width in velocity space of the impulsive momentum-space flux, and, in particular, the dc toroidal electric field.

  4. Design, Packaging, and Architectural Policy Co-optimization for DC Power Integrity in 3D DRAM

    E-Print Network [OSTI]

    Lim, Sung Kyu

    -domain CAD/architectural platform that addresses DC power noise issues in 3D DRAM targeting stacked DDR3) Interposer Figure 1: Default configurations of four 3D DRAM designs. (a) on-chip stacked DDR3, (b) off-chip stacked DDR3, (c) Wide I/O, and (d) HMC. are used in a stacked DDR3 design [2] to reduce power noise. Sub

  5. Analogue Hawking Radiation in a dc-SQUID Array Transmission Line

    E-Print Network [OSTI]

    P. D. Nation; M. P. Blencowe; A. J. Rimberg; E. Buks

    2009-08-01

    We propose the use of a superconducting waveguide formed from an array of dc-SQUID's for investigating analogue Hawking radiation. Biasing the array with a space-time varying flux modifies the propagation velocity of the waveguide, leading to an effective metric with an horizon. Being a fundamentally quantum mechanical device, this setup allows for investigations of quantum effects such as back-reaction and analogue space-time fluctuations on the Hawking process.

  6. Method and apparatus for generating radiation utilizing DC to AC conversion with a conductive front

    DOE Patents [OSTI]

    Dawson, John M. (Pacific Palisades, CA); Mori, Warren B. (Hermosa Beach, CA); Lai, Chih-Hsiang (So. Pasadena, CA); Katsouleas, Thomas C. (Malibu, CA)

    1998-01-01

    Method and apparatus for generating radiation of high power, variable duration and broad tunability over several orders of magnitude from a laser-ionized gas-filled capacitor array. The method and apparatus convert a DC electric field pattern into a coherent electromagnetic wave train when a relativistic ionization front passes between the capacitor plates. The frequency and duration of the radiation is controlled by the gas pressure and capacitor spacing.

  7. 1D AND 2D PIC-MCC SIMULATIONS OF DC DISCHARGES BETWEEN PLANAR ELECTRODES

    E-Print Network [OSTI]

    Wurtele, Jonathan

    1D AND 2D PIC-MCC SIMULATIONS OF DC DISCHARGES BETWEEN PLANAR ELECTRODES Verboncoeur, JV, Hammel in argon and helium (p = 0.1 - 1 Torr; I = 10-6 - 10-2 A) have been simulated using the PIC-MCC methedology using 1d-3v and 2d-3v models. The theory for glow discharges is presented. PIC results are analyzed

  8. VUV generation by adiabatically expanded and excited by a DC electrical discharge Argon gas

    SciTech Connect (OSTI)

    Pipergias, K.; Yasemidis, D.; Reppa, E.; Pentaris, D.; Efthimiopoulos, T.; Merlemis, N.; Giannetas, V.

    2010-11-10

    We investigate the emission of Argon (Ar) gas which is adiabatically expanded through a nozzle and excited using a DC electrical discharge. Because of the expansion and the electronic excitation, Ar dimers and clusters are formed, which give radiation in the second (2nd) and in the third (3rd) continua of Ar, centered at about 126 and 254 nm respectively. We particularly focus our study on the 2nd continuum, in order to develop a laser at this wavelength.

  9. Ultraviolet and electron irradiation of DC-704 siloxane oil in zinc orthotitanate paint

    SciTech Connect (OSTI)

    Mossman, D.L.; Barsh, M.K.; Greenberg, S.A.

    1982-01-01

    Discrepancies exist between accelerated laboratory simulation and geosynchronous orbit flight data for zinc orthotitanate (ZOT) paint degradation. The effects of ultraviolet and electron irradiation on ZOT contaminated with DC-704 silicone oil are reported. In-situ solar absorptance and emittance changes for contaminated and clean specimens are discussed with reference to post-test surface morphology, determined by scanning electron microscope analysis. Features of the contaminated ZOT degradation kinetics correlate with orbital performance.

  10. Power generation by packed-bed air-cathode microbial fuel cells Xiaoyuan Zhang a,b

    E-Print Network [OSTI]

    Power generation by packed-bed air-cathode microbial fuel cells Xiaoyuan Zhang a,b , Juan Shi c to P15 g significantly reduced power generation because of a reduction in oxygen transfer due

  11. Exploring kinetics and thermodynamics in fast-ion conductors and hydrogen-storage materials using ab-initio molecular dynamics

    E-Print Network [OSTI]

    Wood, Brandon C. (Brandon Christopher)

    2007-01-01

    We investigate the interplay between various kinetic processes and thermodynamic factors in three materials--silver iodide (AgI), cesium hydrogen sulfate (CsHSO4), and sodium alanate (NaAlH4)-using ab-initio molecular ...

  12. AB 811 enables you to tailor a program that makes sense for your community and constituents. You determine the

    E-Print Network [OSTI]

    Kammen, Daniel M.

    Fellow Local Government Officials: Imagine a program that: Helps your residents and businesses cut and Highways Code to include "energy improve- ments" on private property as public benefits. Through AB 811

  13. Ab initio molecular dynamics with nuclear quantum effects at classical cost: ring polymer contraction for density functional theory

    E-Print Network [OSTI]

    Marsalek, Ondrej

    2015-01-01

    Path integral molecular dynamics simulations, combined with an ab initio evaluation of interactions using electronic structure theory, incorporate the quantum mechanical nature of both the electrons and nuclei, which are essential to accurately describe systems containing light nuclei. However, path integral simulations have traditionally required a computational cost around two orders of magnitude greater than treating the nuclei classically, making them prohibitively costly for most applications. Here we show that the cost of path integral simulations can be dramatically reduced by extending our ring polymer contraction approach to ab initio molecular dynamics simulations. By using density functional tight binding as a reference system, we show that our ab initio ring polymer contraction (AI-RPC) scheme gives rapid and systematic convergence to the full path integral density functional theory result. We demonstrate the efficiency of this approach in ab initio simulations of liquid water and the reactive pro...

  14. Comparative Study of DC and AC Microgrids in Commercial Buildings Across Different Climates and Operating Profiles: Preprint

    SciTech Connect (OSTI)

    Fregosi, D.; Ravula, S.; Brhlik, D.; Saussele, J.; Frank, S.; Bonnema, E.; Scheib, J.; Wilson, E.

    2015-04-22

    Bosch has developed and demonstrated a novel DC microgrid system designed to maximize utilization efficiency for locally generated photovoltaic energy while offering high reliability, safety, redundancy, and reduced cost compared to equivalent AC systems. Several demonstration projects validating the system feasibility and expected efficiency gains have been completed and additional ones are in progress. This work gives an overview of the Bosch DC microgrid system and presents key results from a large simulation study done to estimate the energy savings of the Bosch DC microgrid over conventional AC systems. The study examined the system performance in locations across the United States for several commercial building types and operating profiles and found that the Bosch DC microgrid uses generated PV energy 6%–8% more efficiently than traditional AC systems.

  15. The design of a hybrid DC motor/SMA actuated robotic hand based on physiological and anatomical synergies

    E-Print Network [OSTI]

    Rosmarin, Josiah Benjamin

    2008-01-01

    A new approach to the design and control of multi-fingered hands using hybrid DC motor-Shape Memory Alloy (SMA) array actuators is presented in this thesis. The fundamental design concept is based on the principle of motor ...

  16. Data:12a45141-7972-4ec8-a2dc-37fedc8133d3 | Open Energy Information

    Open Energy Info (EERE)

    ec8-a2dc-37fedc8133d3 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic...

  17. Design and performance evaluation of an electric go-kart and custom permanent magnet brushless DC motor

    E-Print Network [OSTI]

    Davis, Eli Marc

    2012-01-01

    This undergraduate thesis documents the design considerations and specifications of building a personal battery-powered go-kart. This includes designing and building a custom brushless DC motor for use in the drivetrain. ...

  18. A Generalized Class of Stationary Frame-Current Controllers for Grid-Connected AC–DC Converters

    E-Print Network [OSTI]

    Hwang, J. George

    Within power systems, high-power pulsewidth-modulated ac-dc converters are used in flexible ac transmission systems controllers and for interfacing renewable energy sources to the grid. These converters traditionally ...

  19. Residential Energy Efficiency Research Planning Meeting Summary Report: Washington, D.C. - October 27-28, 2011

    SciTech Connect (OSTI)

    Not Available

    2012-02-01

    This report summarizes key findings and outcomes from the U.S. Department of Energy's Building America Residential Energy Efficiency Research Planning meeting, held on October 28-29, 2011, in Washington, D.C.

  20. The District Emancipation Act and Its Effects on Washington, DC during the Civil War Brittany Jones & Dr. Kenneth Winkle

    E-Print Network [OSTI]

    Farritor, Shane

    but equal rhetoric Opinions & Outcomes: African Americans · Congressional Globe, 37 Congress, 2 session the smuggling of slaves out of DC · African American testimony held equal weight to whites · Only granted