Sample records for alternating-current ac system

  1. Methods, systems and apparatus for controlling operation of two alternating current (AC) machines

    DOE Patents [OSTI]

    Gallegos-Lopez, Gabriel (Torrance, CA); Nagashima, James M. (Cerritos, CA); Perisic, Milun (Torrance, CA); Hiti, Silva (Redondo Beach, CA)

    2012-06-05T23:59:59.000Z

    A system is provided for controlling two alternating current (AC) machines via a five-phase PWM inverter module. The system comprises a first control loop, a second control loop, and a current command adjustment module. The current command adjustment module operates in conjunction with the first control loop and the second control loop to continuously adjust current command signals that control the first AC machine and the second AC machine such that they share the input voltage available to them without compromising the target mechanical output power of either machine. This way, even when the phase voltage available to either one of the machines decreases, that machine outputs its target mechanical output power.

  2. Hardware model of a shipboard zonal electrical distribution system (ZEDS) : alternating current/direct current (AC/DC)

    E-Print Network [OSTI]

    Tidd, Chad N. (Chad Norman)

    2010-01-01T23:59:59.000Z

    A hardware model of a shipboard electrical distribution system based on aspects of the DDG 51 Flight IIA, Arleigh Burke class, 60Hz Alternating Current (AC) and the future direct current (DC), zonal electrical distribution ...

  3. Methods, systems and apparatus for controlling operation of two alternating current (AC) machines

    SciTech Connect (OSTI)

    Gallegos-Lopez, Gabriel (Torrance, CA); Nagashima, James M. (Cerritos, CA); Perisic, Milun (Torrance, CA); Hiti, Silva (Redondo Beach, CA)

    2012-02-14T23:59:59.000Z

    A system is provided for controlling two AC machines. The system comprises a DC input voltage source that provides a DC input voltage, a voltage boost command control module (VBCCM), a five-phase PWM inverter module coupled to the two AC machines, and a boost converter coupled to the inverter module and the DC input voltage source. The boost converter is designed to supply a new DC input voltage to the inverter module having a value that is greater than or equal to a value of the DC input voltage. The VBCCM generates a boost command signal (BCS) based on modulation indexes from the two AC machines. The BCS controls the boost converter such that the boost converter generates the new DC input voltage in response to the BCS. When the two AC machines require additional voltage that exceeds the DC input voltage required to meet a combined target mechanical power required by the two AC machines, the BCS controls the boost converter to drive the new DC input voltage generated by the boost converter to a value greater than the DC input voltage.

  4. Analysis of operations and cyber security policies for a system of cooperating Flexible Alternating Current Transmission System (FACTS) devices.

    SciTech Connect (OSTI)

    Phillips, Laurence R.; Tejani, Bankim; Margulies, Jonathan; Hills, Jason L.; Richardson, Bryan T.; Baca, Micheal J.; Weiland, Laura

    2005-12-01T23:59:59.000Z

    Flexible Alternating Current Transmission Systems (FACTS) devices are installed on electric power transmission lines to stabilize and regulate power flow. Power lines protected by FACTS devices can increase power flow and better respond to contingencies. The University of Missouri Rolla (UMR) is currently working on a multi-year project to examine the potential use of multiple FACTS devices distributed over a large power system region in a cooperative arrangement in which the FACTS devices work together to optimize and stabilize the regional power system. The report describes operational and security challenges that need to be addressed to employ FACTS devices in this way and recommends references, processes, technologies, and policies to address these challenges.

  5. E-Print Network 3.0 - alternating current systems Sample Search...

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

    Geodesy Group Collection: Geosciences 3 EECS 498 Special Topic Grid Integration of Alternative Energy Summary: and design of alternative energy systems. Syllabus: 1. Power...

  6. Alternating current long range alpha particle detector

    DOE Patents [OSTI]

    MacArthur, D.W.; McAtee, J.L.

    1993-02-16T23:59:59.000Z

    An alpha particle detector, utilizing alternating currents, which is capable of detecting alpha particles from distinct sources. The use of alternating currents allows use of simpler ac circuits which, in turn, are not susceptible to dc error components. It also allows the benefit of gas gain, if desired. In the invention, a voltage source creates an electric field between two conductive grids, and between the grids and a conductive enclosure. Air containing air ions created by collision with alpha particles is drawn into the enclosure and detected. In some embodiments, the air flow into the enclosure is interrupted, creating an alternating flow of ions. In another embodiment, a modulated voltage is applied to the grid, also modulating the detection of ions.

  7. Precision electronic speed controller for an alternating-current

    DOE Patents [OSTI]

    Bolie, Victor W. (Albuquerque, NM)

    1988-01-01T23:59:59.000Z

    A high precision controller for an alternating-current multi-phase electrical motor that is subject to a large inertial load. The controller was developed for and is particularly suitable for controlling, in a neutron chopper system, a heavy spinning rotor that must be rotated in phase-locked synchronism with a reference pulse train that is representative of an ac power supply signal having a meandering line frequency. The controller includes a shaft revolution sensor which provides a feedback pulse train representative of the actual speed of the motor. An internal digital timing signal generator provides a reference signal which is compared with the feedback signal in a computing unit to provide a motor control signal. In the preferred embodiment, the motor control signal is a weighted linear sum of a speed error voltage, a phase error voltage, and a drift error voltage, each of which is computed anew with each revolution of the motor shaft. The stator windings of the motor are driven by two amplifiers which are provided with input signals having the proper quadrature relationship by an exciter unit consisting of a voltage controlled oscillator, a binary counter, a pair of readonly memories, and a pair of digital-to-analog converters.

  8. Optical devices having flakes suspended in a host fluid to provide a flake/fluid system providing flakes with angularly dependent optical properties in response to an alternating current electric field due to the dielectric properties of the system

    DOE Patents [OSTI]

    Kosc, Tanya Z. (Rochester, NY); Marshall, Kenneth L. (Rochester, NY); Jacobs, Stephen D. (Pittsford, NY)

    2006-05-09T23:59:59.000Z

    Optical devices utilizing flakes (also called platelets) suspended in a host fluid have optical characteristics, such as reflective properties, which are angular dependent in response to an AC field. The reflectivity may be Bragg-like, and the characteristics are obtained through the use of flakes of liquid crystal material, such as polymer liquid crystal (PLC) materials including polymer cholesteric liquid crystal (PCLC) and polymer nematic liquid crystal (PNLC) material or birefringent polymers (BP). The host fluid may be propylene carbonate, poly(ethylene glycol) or other fluids or fluid mixtures having fluid conductivity to support conductivity in the flake/host system. AC field dependent rotation of 90.degree. can be obtained at rates and field intensities dependent upon the frequency and magnitude of the AC field. The devices are useful in providing displays, polarizers, filters, spatial light modulators and wherever switchable polarizing, reflecting, and transmission properties are desired.

  9. Fault current limiter and alternating current circuit breaker

    DOE Patents [OSTI]

    Boenig, H.J.

    1998-03-10T23:59:59.000Z

    A solid-state circuit breaker and current limiter are disclosed for a load served by an alternating current source having a source impedance, the solid-state circuit breaker and current limiter comprising a thyristor bridge interposed between the alternating current source and the load, the thyristor bridge having four thyristor legs and four nodes, with a first node connected to the alternating current source, and a second node connected to the load. A coil is connected from a third node to a fourth node, the coil having an impedance of a value calculated to limit the current flowing therethrough to a predetermined value. Control means are connected to the thyristor legs for limiting the alternating current flow to the load under fault conditions to a predetermined level, and for gating the thyristor bridge under fault conditions to quickly reduce alternating current flowing therethrough to zero and thereafter to maintain the thyristor bridge in an electrically open condition preventing the alternating current from flowing therethrough for a predetermined period of time. 9 figs.

  10. Techniques for energy conservation in ac motor-driven systems. Final report

    SciTech Connect (OSTI)

    Mohan, N.

    1981-09-01T23:59:59.000Z

    Techniques for energy conservation of reducing losses in ac motor-driven systems proposed by the technical community in response to surging cost of energy are evaluated and compared. Report objectives are to provide better understanding of underlying principles and to evaluate technical and economic viability of these techniques for various applications. An important aspect considered is the impact on electric utility system in terms of harmonics, power factor of operation, and Electro-Magnetic Interference (EMI). The techniques evaluated are: NASA Power Factor Controller, a simple device for reducing power losses in lightly loaded ac motors; wanlass motor modification, a scheme of reconnecting motor windings with capacitors in series, with the intention of improving the motor efficiencies under all loading conditions; conventional variable frequency solid-state inverters which can control the speed of ac motors by producing adjustable frequency ac voltage, with a significant potential for energy conservation in pumps and air-handling systems; and other variable frequency drives and schemes including cycloconverters, slip-recovery scheme, Exxon Alternating Current Synthesizer, Venturini conversion technique, permanent magnet synchronous motors, and a device called the Phase-Liner. The impact of rapid growth in semiconductors and magnetic materials technologies is also considered.

  11. Method for sputtering with low frequency alternating current

    DOE Patents [OSTI]

    Timberlake, J.R.

    1996-04-30T23:59:59.000Z

    Low frequency alternating current sputtering is provided by connecting a low frequency alternating current source to a high voltage transformer having outer taps and a center tap for stepping up the voltage of the alternating current. The center tap of the transformer is connected to a vacuum vessel containing argon or helium gas. Target electrodes, in close proximity to each other, and containing material with which the substrates will be coated, are connected to the outer taps of the transformer. With an applied potential, the gas will ionize and sputtering from the target electrodes onto the substrate will then result. The target electrodes can be copper or boron, and the substrate can be stainless steel, aluminum, or titanium. Copper coatings produced are used in place of nickel and/or copper striking. 6 figs.

  12. Method for sputtering with low frequency alternating current

    DOE Patents [OSTI]

    Timberlake, John R. (Allentown, NJ)

    1996-01-01T23:59:59.000Z

    Low frequency alternating current sputtering is provided by connecting a low frequency alternating current source to a high voltage transformer having outer taps and a center tap for stepping up the voltage of the alternating current. The center tap of the transformer is connected to a vacuum vessel containing argon or helium gas. Target electrodes, in close proximity to each other, and containing material with which the substrates will be coated, are connected to the outer taps of the transformer. With an applied potential, the gas will ionize and sputtering from the target electrodes onto the substrate will then result. The target electrodes can be copper or boron, and the substrate can be stainless steel, aluminum, or titanium. Copper coatings produced are used in place of nickel and/or copper striking.

  13. STATE OF CALIFORNIA DISTRIBUTED ENERGY STORAGE DX AC SYSTEMES ACCEPTANCE

    E-Print Network [OSTI]

    STATE OF CALIFORNIA DISTRIBUTED ENERGY STORAGE DX AC SYSTEMES ACCEPTANCE CEC-MECH-14A (Revised 08/09) CALIFORNIA ENERGY COMMISSION CERTIFICATE OF ACCEPTANCE MECH-14A NA7.5.13 Distributed Energy Storage DX AC DISTRIBUTED ENERGY STORAGE DX AC SYSTEMES ACCEPTANCE CEC-MECH-14A (Revised 08/09) CALIFORNIA ENERGY COMMISSION

  14. Enhancement of crystal homogeneity of protein crystals under application of an external alternating current electric field

    SciTech Connect (OSTI)

    Koizumi, H.; Uda, S.; Fujiwara, K.; Nozawa, J. [Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577 (Japan); Tachibana, M. [Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, 236-0027 (Japan); Kojima, K. [Department of Education, Yokohama Soei University, 1 Miho-tyou, Midori-ku, Yokohama, 226-0015 (Japan)

    2014-10-06T23:59:59.000Z

    X-ray diffraction rocking-curve measurements were performed on tetragonal hen egg white (HEW) lysozyme crystals grown with and without the application of an external alternating current (AC) electric field. The crystal quality was assessed by the full width at half maximum (FWHM) value for each rocking curve. For two-dimensional maps of the FWHMs measured on the 440 and the 12 12 0 reflection, the crystal homogeneity was improved under application of an external electric field at 1 MHz, compared with that without. In particular, the significant improvement of the crystal homogeneity was observed for the 12 12 0 reflection.

  15. Nonlinear alternating current responses of dipolar fluids J. P. Huang

    E-Print Network [OSTI]

    Huang, Ji-Ping

    Nonlinear alternating current responses of dipolar fluids J. P. Huang Max Planck Institute Mechanics Group, Laboratory of Computational Engineering, Helsinki University of Technology, P. O. Box 9203-dependent nonlinear dielectric increment of dipolar fluids in nonpolar fluids is often mea- sured by using

  16. DC, AC and advanced EV propulsion systems

    SciTech Connect (OSTI)

    O'Neil, W.

    1983-08-01T23:59:59.000Z

    Battery development and liquid fuel availability and cost are still the pacing factors in wide scale electric vehicle introduction. Propulsion systems also require technical development, however, if electric vehicles are to be acceptable in the marketplace in competition against ICE vehicles. Eaton Corporation has undertaken a program designed to identify and investigate three broad types of propulsion systems in identical test vehicles on the same test track under conditions as similar as possible. Characteristics of dc, ac and advanced systems are compared to date, and projections of anticipated results and further work are provided. The compelling advantages of multiple mechanical ratios in EV propulsion systems are reviewed. An emerging, but less obvious, advantage is higher overall system efficiency.

  17. AVTA Voltec AC Level 1 and Level 2 Charging Systems Testing Results...

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

    Eaton AC Level 2 Charging System Testing Results AVTA: Aerovironment AC Level 2 Charging System Testing Results AVTA: Siemens-VersiCharge AC Level 2 Charging System Testing Results...

  18. E-Print Network 3.0 - ac systems Sample Search Results

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

    AC DC SYSTEMS Christopher L. DeMarco Claudio A. Ca... reasonably detailed third order HVDC dynamics along with ac system models that include reactive ows... strong" ac systems,...

  19. E-Print Network 3.0 - ac graftrope system Sample Search Results

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

    AC DC SYSTEMS Christopher L. DeMarco Claudio A. Ca... reasonably detailed third order HVDC dynamics along with ac system models that include reactive ows... strong" ac systems,...

  20. AVTA: Siemens-VersiCharge AC Level 2 Charging System Testing...

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

    Siemens-VersiCharge AC Level 2 Charging System Testing Results AVTA: Siemens-VersiCharge AC Level 2 Charging System Testing Results The Vehicle Technologies Office's Advanced...

  1. Alternating current response of carbon nanotubes with randomly distributed impurities

    SciTech Connect (OSTI)

    Hirai, Daisuke; Watanabe, Satoshi [Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656 (Japan); Yamamoto, Takahiro [Department of Electrical Engineering and Department of Liberal Arts (Physics), Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo 125-8585 (Japan)

    2014-10-27T23:59:59.000Z

    The increasing need for nanodevices has necessitated a better understanding of the electronic transport behavior of nanomaterials. We therefore theoretically examine the AC transport properties of metallic carbon nanotubes with randomly distributed impurities. We find that the long-range impurity scattering increases the emittance, but does not affect the DC conductance. The estimated dwell time of electrons increases with the potential amplitudes. That is, multiple scattering by the impurities increases the kinetic inductance in proportion to the dwell time, which eventually increases the emittance. We believe that our findings can contribute significantly to nanodevice development.

  2. AVTA: GE Energy WattStation AC Level 2 Charging System Testing...

    Energy Savers [EERE]

    2012 More Documents & Publications AVTA: Aerovironment AC Level 2 Charging System Testing Results AVTA: GE Smart Grid Capable AC Level 2 Testing Results AVTA: Siemens-VersiCharge...

  3. Electrostatic coalescence system with independent AC and DC hydrophilic electrodes

    DOE Patents [OSTI]

    Hovarongkura, A. David (Arlington, VA); Henry, Jr., Joseph D. (Morgantown, WV)

    1981-01-01T23:59:59.000Z

    An improved electrostatic coalescence system is provided in which independent AC and DC hydrophilic electrodes are employed to provide more complete dehydration of an oil emulsion. The AC field is produced between an AC electrode array and the water-oil interface wherein the AC electrode array is positioned parallel to the interface which acts as a grounded electrode. The emulsion is introduced into the AC field in an evenly distributed manner at the interface. The AC field promotes drop-drop and drop-interface coalescence of the water phase in the entering emulsion. The continuous oil phase passes upward through the perforated AC electrode array and enters a strong DC field produced between closely spaced DC electrodes in which small dispersed droplets of water entrained in the continuous phase are removed primarily by collection at hydrophilic DC electrodes. Large droplets of water collected by the electrodes migrate downward through the AC electrode array to the interface. All phase separation mechanisms are utilized to accomplish more complete phase separation.

  4. Development of an AC Module System: Final Technical Report

    SciTech Connect (OSTI)

    Suparna Kadam; Miles Russell

    2012-06-15T23:59:59.000Z

    The GreenRay Inc. program focused on simplifying solar electricity and making it affordable and accessible to the mainstream population. This was accomplished by integrating a solar module, micro-inverter, mounting and monitoring into a reliable, 'plug and play' AC system for residential rooftops, offering the following advantages: (1) Reduced Cost: Reduction in installation labor with fewer components, faster mounting, faster wiring. (2) Maximized Energy Production: Each AC Module operates at its maximum, reducing overall losses from shading, mismatch, or module downtime. (3) Increased Safety. Electrical and fire safety experts agree that AC Modules have significant benefits, with no energized wiring or live connections during installation, maintenance or emergency conditions. (4) Simplified PV for a Broader Group of Installers. Dramatic simplification of design and installation of a solar power system, enabling faster and more efficient delivery of the product into the market through well-established, mainstream channels. This makes solar more accessible to the public. (5) Broadened the Rooftop Market: AC Modules enable solar for many homes that have shading, split roofs, or obstructions. In addition, due to the smaller building block size of 200W vs. 1000W, homeowners with budget limitations can start small and add to their systems over time. Through this DOE program GreenRay developed the all-in-one AC Module system with an integrated PV Module and microinverter, custom residential mounting and performance monitoring. Development efforts took the product from its initial concept, through prototypes, to a commercial product sold and deployed in the residential market. This pilot deployment has demonstrated the technical effectiveness of the AC Module system in meeting the needs and solving the problems of the residential market. While more expensive than the traditional central inverter systems at the pilot scale, the economics of AC Modules become more and more favorable as the product matures and is made in high volumes. GreenRay's early customers have been highly enthusiastic about the AC Module system benefits.

  5. Study of corrosion of super martensitic stainless steel under alternating current in artificial seawater with electrochemical impedance spectroscopy

    SciTech Connect (OSTI)

    Reyes, T.; Bhola, S.; Olson, D. L.; Mishra, B. [Colorado School of Mines, Golden CO 80401 (United States)

    2011-06-23T23:59:59.000Z

    The assessment of corrosion requires the use of tools able to quantify the corrosion but often times also qualify it. Electrochemical Impedance Spectroscopy (EIS) is a laboratory tool that can provide both qualification and quantification of corrosion. EIS was successfully used to compare the thickness of the corrosion products formed during the application of different alternating current (AC) densities as well as to characterize pitting. When EIS is applied at the open circuit potential, the technique is nondestructive and predicts the corrosion behavior of the electrode. It can also be used at cathodic potentials while still being nondestructive, providing information about the electrode reaction kinetics, diffusion and electrical double layer.

  6. AC corrosion on cathodically protected steel.

    E-Print Network [OSTI]

    Torstensen, Andreas

    2012-01-01T23:59:59.000Z

    ?? This report deals with the effect of alternating current on cathodically protected steel. AC corrosion has become relevant in the offshore industry due toÖ (more)

  7. HVDC-AC system interaction from AC harmonics. Volume 1. Harmonic impedance calculations. Final report

    SciTech Connect (OSTI)

    Breuer, G D; Chow, J H; Lindh, C B; Miller, N W; Numrich, F H; Price, W W; Turner, A E; Whitney, R R

    1982-09-01T23:59:59.000Z

    Improved methods are needed to characterize ac system harmonic behavior for ac filter design for HVDC systems. The purpose of this General Electric Company RP1138 research is to evaluate the present filter design practice and to investigate methods for calculating system harmonic impedances. An overview of ac filter design for HVDC systems and a survey of literature related to filter design have been performed. Two methods for calculating system harmonic impedances have been investigated. In the measurement method, an instrumentation system for measuring system voltage and current has been assembled. Different schemes of using the measurements to calculate system harmonic impedances have been studied. In the analytical method, a procedure to include various operating conditions has been proposed. Computer programs for both methods have been prepared, and the results of the measurement and analytical methods analyzed. A conclusion of the project is that the measurement and analytical methods both provided reasonable results. There are correlations between the measured and analytical results for most harmonics, although there are discrepancies between the assumptions used in the two methods. A sensitivity approach has been proposed to further correlate the results. From the results of the analysis, it is recommended that both methods should be tested further. For the measurement method, more testing should be done to cover different system operating conditions. In the analytical method, more detailed models for representing system components should be studied. In addition, alternative statistical and sensitivity approaches should be attempted.

  8. Alternative current conduction mechanisms of organic-inorganic compound [N(CH{sub 3}){sub 3}H]{sub 2}ZnCl{sub 4}

    SciTech Connect (OSTI)

    Ben Bechir, M., E-mail: mohamedbenbechir@hotmail.fr; Karoui, K.; Guidara, K.; Ben Rhaiem, A. [Laboratory of Condensed Matter, Faculty of Sciences, University of Sfax, BP1171, 3018 Sfax (Tunisia); Tabellout, M. [LUNAM Universitť, Universitť du Maine, CNRS UMR 6283, Institut des Molťcules et Matťriaux du Mans (IMMM), Avenue Olivier Messiaen, F-72085, Le Mans Cedex 09 (France)

    2014-04-21T23:59:59.000Z

    [N(CH{sub 3}){sub 3}H]{sub 2}ZnCl{sub 4} has been studied by X-ray powder diffraction patterns, differential scanning calorimetry (DSC), and impedance spectroscopy. The [N(CH{sub 3}){sub 3}H]{sub 2}ZnCl{sub 4} hybrid compound is crystallized at room temperature (T ? 300?K) in the orthorhombic system with Pnma space group. Five phase transitions (T{sub 1}?=?255?K, T{sub 2}?=?282?K, T{sub 3}?=?302?K, T{sub 4}?=?320?K, and T{sub 5}?=?346?K) have been proved by DSC measurements. The electrical technique was measured in the 10{sup ?1}-10{sup 7}?Hz frequency range and 233Ė363?K temperature interval. The frequency dependence of alternative current (AC) conductivity is interpreted in terms of Jonscher's law. The AC electrical conduction in [N(CH{sub 3}){sub 3}H]{sub 2}ZnCl{sub 4} is analyzed by different processes, which can be attributed to several models: the correlated barrier hopping model in phase I, the overlapping large polaron tunneling model in phase II, the quantum mechanical tunneling model in phase IV, and the non-overlapping small polaron tunneling model in phases III, V, and VI. The conduction mechanism is studied with the help of Elliot's theory, and the Elliot's parameters are determined.

  9. Alternative current conduction mechanisms of organic-inorganic compound [N(CH{sub 3}){sub 3}H]{sub 2}CuCl{sub 4}

    SciTech Connect (OSTI)

    Ben Bechir, M., E-mail: mohamedbenbechir@hotmail.fr; Karoui, K.; Guidara, K.; Ben Rhaiem, A. [Laboratory of Condensed Matter, Faculty of Sciences, University of Sfax, BP1171, 3018 Sfax (Tunisia); Tabellout, M. [LUNAM Universitť, Universitť du Maine, CNRS UMR 6283, Institut des Molťcules et Matťriaux du Mans (IMMM), Avenue Olivier Messiaen, F-72085 Le Mans Cedex 09 (France)

    2014-05-28T23:59:59.000Z

    The [N(CH{sub 3}){sub 3}H]{sub 2}CuCl{sub 4} single crystal has been analyzed by X-ray powder diffraction patterns, differential scanning calorimetry (DSC), and electrical impedance spectroscopy. [N(CH{sub 3}){sub 3}H]{sub 2}CuCl{sub 4} crystallizes at room temperature in the monoclinic system with P2{sub 1}/{sub C} space group. Three phase transitions at T{sub 1}?=?226?K, T{sub 2}?=?264?K, and T{sub 3}?=?297?K have been evidenced by DSC measurements. The electrical technique was measured in the 10{sup ?1}Ė10{sup 7}?Hz frequency range and 203Ė313?K temperature intervals. The frequency dependence of alternative current (AC) conductivity is interpreted in terms of Jonscher's law (developed). The AC electrical conduction in [N(CH{sub 3}){sub 3}H]{sub 2}CuCl{sub 4} compound is studied by two processes which can be attributed to a hopping transport mechanism: the correlated barrier hopping model in phases I, II, and III, the non-overlapping small polaron tunneling model in phase IV. The conduction mechanism is interpreted with the help of Elliot's theory, and the Elliot's parameters are found.

  10. Aircraft AC Generators: Hybrid System Modeling and Simulation

    E-Print Network [OSTI]

    Koutsoukos, Xenofon D.

    --Integrated Drive Generators (IDGs) are the main source of electrical power for a number of critical systems1 Aircraft AC Generators: Hybrid System Modeling and Simulation Ashraf Tantawy, Student Member is a difficult task. dq0 models have been developed for design and control of generators, but these models

  11. System and method for determining stator winding resistance in an AC motor using motor drives

    SciTech Connect (OSTI)

    Lu, Bin; Habetler, Thomas G; Zhang, Pinjia

    2013-02-26T23:59:59.000Z

    A system and method for determining the stator winding resistance of AC motors is provided. The system includes an AC motor drive having an input connectable to an AC source and an output connectable to an input terminal of an AC motor, a pulse width modulation (PWM) converter having switches therein to control current flow and terminal voltages in the AC motor, and a control system connected to the PWM converter. The control system generates a command signal to cause the PWM converter to control an output of the AC motor drive corresponding to an input to the AC motor, selectively generates a modified command signal to cause the PWM converter to inject a DC signal into the output of the AC motor drive, and determines a stator winding resistance of the AC motor based on the DC signal of at least one of the voltage and current.

  12. EMTP modeling of CIGRE benchmark based HVDC transmission system operating with weak AC systems

    SciTech Connect (OSTI)

    Sood, V.K. [Hydro-Quebec, Varennes, Quebec (Canada); Khatri, V.; Jin, H. [Concordia Univ., Montreal, Quebec (Canada). Dept. of Electrical and Computer Engineering

    1995-12-31T23:59:59.000Z

    An EMTP based study of a CIGRE benchmark based HVDC system operating with weak ac systems is carried out. The modeled system provides a starting point for (a) educators teaching HVDC transmission courses and (b) for utility planners to develop their own low-cost dedicated digital simulators for training purposes. In this paper, modeling details of the ac-dc system, dc converters and control are presented. To validate the control schemes presented, the HVDC system is tested under ac-dc fault conditions. Results obtained from an EMTP-based study under these fault conditions are also presented in this paper.

  13. System and Battery Charge Control for PV-Powered AC Lighting Systems

    SciTech Connect (OSTI)

    Kern, G.

    1999-04-01T23:59:59.000Z

    This report reviews a number of issues specific to stand-alone AC lighting systems. A review of AC lighting technology is presented, which discusses the advantages and disadvantages of various lamps. The best lamps for small lighting systems are compact fluorescent. The best lamps for intermediate-size systems are high- or low-pressure sodium. Specifications for battery charging and load control are provided with the goal of achieving lamp lifetimes on the order of 16,000 to 24,000 hours and battery lifetimes of 4 to 5 years. A rough estimate of the potential domestic and global markets for stand-alone AC lighting systems is presented. DC current injection tests were performed on high-pressure sodium lamps and the test results are presented. Finally, a prototype system was designed and a prototype system controller (with battery charger and DC/AC inverter) was developed and built.

  14. Nonlinear modal interaction in HVDC/AC power systems with dc power modulation

    SciTech Connect (OSTI)

    Ni, Y.X. [Tsinghua Univ., Beijing (China)] [Tsinghua Univ., Beijing (China); Vittal, V.; Kliemann, W.; Fouad, A.A. [Iowa State Univ., Ames, IA (United States)] [Iowa State Univ., Ames, IA (United States)

    1996-11-01T23:59:59.000Z

    In this paper investigation of nonlinear modal interaction using the normal form of vector fields technique is extended to HVDC/AC power systems with dc power modulation. The ac-dc interface equations are solved to form a state space model with second order approximation. Using the normal form technique, the system`s nonlinear dynamic characteristics are obtained. The proposed approach is applied to a 4-generator HVDC/AC test power system, and compare with the time domain solution.

  15. System and method for determining stator winding resistance in an AC motor

    SciTech Connect (OSTI)

    Lu, Bin (Kenosha, WI); Habetler, Thomas G. (Snellville, GA); Zhang, Pinjia (Atlanta, GA); Theisen, Peter J. (West Bend, WI)

    2011-05-31T23:59:59.000Z

    A system and method for determining stator winding resistance in an AC motor is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of an AC motor. The circuit includes at least one contactor and at least one switch to control current flow and terminal voltages in the AC motor. The system also includes a controller connected to the circuit and configured to modify a switching time of the at least one switch to create a DC component in an output of the system corresponding to an input to the AC motor and determine a stator winding resistance of the AC motor based on the injected DC component of the voltage and current.

  16. Method and apparatus for reducing the harmonic currents in alternating-current distribution networks

    DOE Patents [OSTI]

    Beverly, L.H.; Hance, R.D.; Kristalinski, A.L.; Visser, A.T.

    1996-11-19T23:59:59.000Z

    An improved apparatus and method reduce the harmonic content of AC line and neutral line currents in polyphase AC source distribution networks. The apparatus and method employ a polyphase Zig-Zag transformer connected between the AC source distribution network and a load. The apparatus and method also employs a mechanism for increasing the source neutral impedance of the AC source distribution network. This mechanism can consist of a choke installed in the neutral line between the AC source and the Zig-Zag transformer. 23 figs.

  17. Method and apparatus for reducing the harmonic currents in alternating-current distribution networks

    DOE Patents [OSTI]

    Beverly, Leon H. (Lockport, IL); Hance, Richard D. (Elburn, IL); Kristalinski, Alexandr L. (Naperville, IL); Visser, Age T. (Geneva, IL)

    1996-01-01T23:59:59.000Z

    An improved apparatus and method reduce the harmonic content of AC line and neutral line currents in polyphase AC source distribution networks. The apparatus and method employ a polyphase Zig-Zag transformer connected between the AC source distribution network and a load. The apparatus and method also employs a mechanism for increasing the source neutral impedance of the AC source distribution network. This mechanism can consist of a choke installed in the neutral line between the AC source and the Zig-Zag transformer.

  18. Test plan for performance testing of the Eaton AC-3 electric vehicle

    SciTech Connect (OSTI)

    Crumley, R.L.; Heiselmann, H.W.

    1985-04-01T23:59:59.000Z

    An alternating current (ac) propulsion system for an electric vehicle has been developed and tested by the Eaton Corporation. The test bed vehicle is a modified 1981 Mercury Lynx. The test plan has been prepared specifically for the third modification to this test bed and identified as the Eaton AC-3. The scope of the EG and G testing at INEL to be done on the Eaton AC-3 will include coastdown and dynamometer tests but will not include environmental, on-road, or track testing. Coastdown testing will be performed in accordance with SAE J-1263 (SAE Recommended Practice for Road Load Measurement and Dynamometer Simulation Using Coastdown Techniques).

  19. Review of the design and performance features of hvdc systems connected to low short circuit ratio ac systems

    SciTech Connect (OSTI)

    Thallam, R.S. (Salt River Project, Phoenix, AZ (United States))

    1992-10-01T23:59:59.000Z

    The design and performance of an HVdc system is significantly impacted by the relative strength of the ac system to which it is connected. In this paper, design and performance features of ten HVdc systems are discussed. All of these systems are connected to ac systems that are relatively weak compared to the rating of the dc system. Six of these systems are back-to-back, two are overhead lines, and two are undersea cable connections. AC and dc system interaction problems and how they are addressed in the design and specification of each of these systems, are described.

  20. Comparison of the Unique Mobility and DOE-developed ac electric drive systems

    SciTech Connect (OSTI)

    Cole, G.H.

    1993-01-01T23:59:59.000Z

    A comparison was made between the most recent DOE-developed AC electric vehicle drive systems and that which is independently under development by Unique Mobility of Golden, Colorado. The DOE-developed AC systems compared in this study are the Single-Shaft Electric Propulsion System (ETX-II) developed by Ford Motor Company and the General Electric Company under contract number DE-AC07-85NV10418, the Dual-Shaft Electric Propulsion (DSEP) System developed by Eaton Corporation under contract number DOE-AC08-84NV-10366, and the anticipated results of the Modular Electric Vehicle (MEV) system currently being developed by Ford and General Electric under contract number DE-AC07-90ID13019. The Unique Mobility brushless DC electric vehicle drive system represents their latest electric drive technology and is being developed in cooperation with BMW Technik Gmbh of Germany. Comparisons of specific volume, specific weight, efficiency and expected vehicle performance are made of the different systems based upon measured system performance data where available. One conclusion presented is that the Unique Mobility drive system under development with BMW appears to provide comparable performance to the AC systems studied.

  1. Microfabricated AC impedance sensor

    DOE Patents [OSTI]

    Krulevitch, Peter (Pleasanton, CA); Ackler, Harold D. (Sunnyvale, CA); Becker, Frederick (Houston, TX); Boser, Bernhard E. (Berkeley, CA); Eldredge, Adam B. (Austin, TX); Fuller, Christopher K. (Livermore, CA); Gascoyne, Peter R. C. (Bellaire, TX); Hamilton, Julie K. (Tracy, CA); Swierkowski, Stefan P. (Livermore, CA); Wang, Xiao-Bo (San Diego, CA)

    2002-01-01T23:59:59.000Z

    A microfabricated instrument for detecting and identifying cells and other particles based on alternating current (AC) impedance measurements. The microfabricated AC impedance sensor includes two critical elements: 1) a microfluidic chip, preferably of glass substrates, having at least one microchannel therein and with electrodes patterned on both substrates, and 2) electrical circuits that connect to the electrodes on the microfluidic chip and detect signals associated with particles traveling down the microchannels. These circuits enable multiple AC impedance measurements of individual particles at high throughput rates with sufficient resolution to identify different particle and cell types as appropriate for environmental detection and clinical diagnostic applications.

  2. AC system stability analysis and assessment for Shipboard Power Systems

    E-Print Network [OSTI]

    Qi, Li

    2006-04-12T23:59:59.000Z

    due to reconfiguration might cause voltage instability, such as progressive voltage decreases or voltage oscillations. SPS stability thus should be assessed to ensure the stable operation of a system during reconfiguration. In this dissertation, time...

  3. Dynamic performance of a STATCON at an HVDC inverter feeding a very weak AC system

    SciTech Connect (OSTI)

    Zhuang, Y.; Menzies, R.W. [Univ. of Manitoba, Winnipeg, Manitoba (Canada)] [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Nayak, O.B. [HVDC Research Centre, Winnipeg, Manitoba (Canada)] [HVDC Research Centre, Winnipeg, Manitoba (Canada); Turanli, H.M. [Manitoba Hydro, Winnipeg, Manitoba (Canada)] [Manitoba Hydro, Winnipeg, Manitoba (Canada)

    1996-04-01T23:59:59.000Z

    This paper investigates the dynamic performance of the advanced static var compensator or STATCON at a high voltage direct current (HVDC) converter terminal where the ac system has a very low short circuit ratio (SCR). The STATCON is based on a nine-level GTO thyristor inverter. The studies include operating characteristics of the STATCON under various ac and dc disturbances. The simulation results are compared with other types of reactive power compensation options available for such applications. It is shown that the STATCON has clear advantages over the other compensators, in areas such as; fault response time, voltage support ability, and dc recovery, while operating with very weak ac systems.

  4. Lift-and-Project Relaxations of AC Microgrid Distribution System Planning

    E-Print Network [OSTI]

    Taylor, Joshua A.

    2011-01-01T23:59:59.000Z

    We apply relaxation procedures to polynomial optimization problems that originate in transmission system planning, and obtain new convex formulations for the AC case. The approach is novel because the optimization is ...

  5. MIT Electric Vehicle Team Porsche designing a cooling system for the AC24 electric motor

    E-Print Network [OSTI]

    Meenen, Jordan N

    2010-01-01T23:59:59.000Z

    In this thesis I worked on the design and analysis of a cooling system for the electric motor of the MIT Electric Vehicle Team's Porsche 914 Battery Electric Vehicle. The vehicle's Azure Dynamics AC24 motor tended to ...

  6. An evaluation of the Panasonic model UD513AC-1 thermoluminescence dosimetry system

    E-Print Network [OSTI]

    Durrer, Russell Edward

    2012-06-07T23:59:59.000Z

    for the degree of MASTER OF SCIENCE December 1991 Major Subject: Health Physics AN EVALUATION OF THE PANASONIC MODEL UD513AC-I THERMOLUMINESCENCE DOSIMETRY SYSTEM A Thesis by RUSSELL EDWARD DURRER JR. Approved as to style and content by: John W. Poston... (Chair of Committee) Wesl E. Bolch (Member) ilton E. Mc ain (Member) Dan Hig tower (Member) John W. Poston (Head of Department) December 1991 ABSTRACT An Evaluation of the Panasonic Model UD513AC-1 Thermoluminescence Dosimetry System...

  7. Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive

    DOE Patents [OSTI]

    Konrad, Charles E. (Roanoke, VA); Boothe, Richard W. (Roanoke, VA)

    1996-01-01T23:59:59.000Z

    A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements.

  8. Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive

    DOE Patents [OSTI]

    Konrad, Charles E. (Roanoke, VA); Boothe, Richard W. (Roanoke, VA)

    1994-01-01T23:59:59.000Z

    A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements.

  9. Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive

    DOE Patents [OSTI]

    Konrad, C.E.; Boothe, R.W.

    1996-01-23T23:59:59.000Z

    A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements. 6 figs.

  10. Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive

    DOE Patents [OSTI]

    Konrad, C.E.; Boothe, R.W.

    1994-02-15T23:59:59.000Z

    A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements. 6 figures.

  11. Probing Mott lobes via the AC Josephson effect

    E-Print Network [OSTI]

    M. X. Huo; Ying Li; Z. Song; C. P. Sun

    2008-03-04T23:59:59.000Z

    The alternating-current (AC) Josephson effect is studied in a system consisting of two weakly coupled Bose Hubbard models. In the framework of the mean field theory, Gross-Pitaevskii equations show that the amplitude of the Josephson current is proportional to the product of superfluid order parameters. In addition, the chemical potential--current relation for a small size system is obtained via the exact numerical computation. This allows us to propose a feasible experimental scheme to measure the Mott lobes of the quantum phase transition.

  12. A robust coordinated control scheme for HVDC transmission with parallel AC systems

    SciTech Connect (OSTI)

    To, K.W.V.; David, A.K. (Hong Kong Polytechnic (Hong Kong). Dept. of Electrical Engineering); Hammad, A.E. (N.E. Swiss Power Co., Baden (Switzerland))

    1994-07-01T23:59:59.000Z

    This paper introduces a practical control philosophy for HVDC transmission in parallel operation to an AC system with particular emphasis on coordination of both transient and dynamic stability. Systematic development of the control scheme on the basis of on-line identification, optimal control and rule-based bang-optimal coordination principles is presented. Verification tests of the scheme on a physical HVDC/AC system simulator show that the simple control computer algorithm is practical and robust. The controller can successfully distinguish between different system fault severities and adapts its output signals to provide maximum synchronizing torque and ensure optimal damping of power oscillations.

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

    E-Print Network [OSTI]

    Qu, Zhihua

    A nonlinear robust HVDC control for a parallel AC/DC power system Hongzhi Cai a , Zhihua Qu b. Keywords: Robust control; HVDC; Power system; Stability; Lyapunov method 1. Introduction It has been recognized that, through an HVDC transmission line, fast electronic control can be applied on the DC power

  14. Direct current uninterruptible power supply method and system

    DOE Patents [OSTI]

    Sinha, Gautam

    2003-12-02T23:59:59.000Z

    A method and system are described for providing a direct current (DC) uninterruptible power supply with the method including, for example: continuously supplying fuel to a turbine; converting mechanical power from the turbine into alternating current (AC) electrical power; converting the AC electrical power to DC power within a predetermined voltage level range; supplying the DC power to a load; and maintaining a DC load voltage within the predetermined voltage level range by adjusting the amount of fuel supplied to the turbine.

  15. System and method for monitoring and controlling stator winding temperature in a de-energized AC motor

    DOE Patents [OSTI]

    Lu, Bin (Kenosha, WI); Luebke, Charles John (Sussex, WI); Habetler, Thomas G. (Snellville, GA); Zhang, Pinjia (Atlanta, GA); Becker, Scott K. (Oak Creek, WI)

    2011-12-27T23:59:59.000Z

    A system and method for measuring and controlling stator winding temperature in an AC motor while idling is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of a multi-phase AC motor. The circuit further includes a plurality of switching devices to control current flow and terminal voltages in the multi-phase AC motor and a controller connected to the circuit. The controller is configured to activate the plurality of switching devices to create a DC signal in an output of the motor control device corresponding to an input to the multi-phase AC motor, determine or estimate a stator winding resistance of the multi-phase AC motor based on the DC signal, and estimate a stator temperature from the stator winding resistance. Temperature can then be controlled and regulated by DC injection into the stator windings.

  16. Application of the AC Commutator Machine in Wind Energy Conversion Systems

    E-Print Network [OSTI]

    El-Jamous, Sami Georges

    1981-01-01T23:59:59.000Z

    APPLICATION OF THE AC OOMM3TATOR MACHINE IN WIND ENERGY CONVKGION SYSTB3S A Thesis By SAMI GF33RGES EL-Jhl'3OUS Submitted to the Graduate College of Twas AW University in partial fulfillment of the requirement for the degree of MASTER... Application of the AC Comnutator Nachine in Wind Energy Conversion Systems. (Nay 1981) Semi Georges El-Jasnus, B. A. Nathenatics, Texas ASN University; Chairman of Advisory Comnittee: Dr. A. K. Ayoub The thesis investigates the tectudcal feasibility...

  17. State of the art analysis of online fault location on AC cables in underground transmission systems

    E-Print Network [OSTI]

    Bak, Claus Leth

    on transmission level fault location methods have been focused on overhead lines. Because of the very different- termine the fault location. Because only one end meas- urements are used, the algorithm is derived usingState of the art analysis of online fault location on AC cables in underground transmission systems

  18. A system for tranmitting low frequency analog signals over ac power lines

    DOE Patents [OSTI]

    Baker, S.P.; Durall, R.L.; Haynes, H.D.

    1987-07-30T23:59:59.000Z

    A system for transmitting low frequency analog signals over ac power lines using FM modulation. A low frequency analog signal to be transmitted is first applied to a voltage-to-frequency converter where it is converted to a signal whose frequency varies in proportion to the analog signal amplitude. This signal is then used to modulate the carrier frequency of an FM transmitter coupled to an ac power line. The modulation signal frequency range is selected to be within the response band of the FM transmitter. The FM modulated carrier signal is received by an FM receiver coupled to the ac power line, demodulated and the demodulated signal frequency is converted by a frequency-to-voltage converter back to the form of the original low frequency analog input signal. 4 figs.

  19. E-Print Network 3.0 - alternating current motors Sample Search...

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

    of Astronomy, University of Arizona Collection: Physics 3 ELSEVIER Electric Power Systems Research 42 (1997) 225-228 A model for induction motor aggregation for power system...

  20. Methodology for integration of HVDC links in large ac systems. Phase I. Reference manual. Final report

    SciTech Connect (OSTI)

    Meredith, R.J.

    1983-03-01T23:59:59.000Z

    HVDC transmission has been found to be an attractive alternative to ac transmission in many situations. Evaluations of HVDC alternatives include technical, economic, environmental and sometimes regulatory considerations which are different than those for ac transmission. This research project resulted in the preparation of a HVDC reference manual which describes a comprehensive methodology for evaluating HVDC alternatives in utility transmission planning. It provides basic background information about existing HVDC systems. It describes the types of studies required and potential problems which must be dealt with. It also discusses how the studies are usually run and what system modeling is required. It emphasizes the importance of proper control of the dc system and provides examples of control systems which have been used.

  1. An evaluation of the Panasonic model UD513AC-1 Thermoluminescence Dosimetry system

    SciTech Connect (OSTI)

    Durrer, R.E. Jr. [Texas A and M Univ., College Station, TX (United States)

    1991-12-01T23:59:59.000Z

    An evaluation of the Panasonic UD513AC-1 Thermoluminescence Dosimetry system was performed to determine the system`s capabilities as a general purpose thermoluminescence dosimeter measuring device. The tests that were performed included a critique of the user`s manual, delimitation of the operating parameters, the quality of construction, and an evaluation of the features that were unique to this system. The UD513AC-1 was found to be an adequate measuring device for most dosimetric applications. It was not well suited for experimental work with thermoluminescence materials due to a low sensitivity displayed by the photomultiplier tube to commonly used materials. The system was well constructed and did not suffer hardware failure during this research. Major attributes of the UD513AC-1 were automatic data storage, highly reproducible heating ramps, an excellent infrared light filter and a unique feature to a single phosphor unit, a dose determination function. Negative aspects of the system included a limited data manipulation capability within the controlling program, a poorly written user`s manual, inadequate sensitivity on the part of the photomultiplier tube, and insufficient capability to adjust the hot N{sub 2} gas flow to desired levels.

  2. Clock Controller For Ac Self-Timing Analysis Of Logic System

    DOE Patents [OSTI]

    Lo, Tinchee (Fishkill, NY); Flanagan, John D. (Rhinebeck, NY)

    2004-05-18T23:59:59.000Z

    A clock controller and clock generating method are provided for AC self-test timing analysis of a logic system. The controller includes latch circuitry which receives a DC input signal at a data input, and a pair of continuous out-of-phase clock signals at capture and launch clock inputs thereof. The latch circuitry outputs two overlapping pulses responsive to the DC input signal going high. The two overlapping pulses are provided to waveform shaper circuitry which produces therefrom two non-overlapping pulses at clock speed of the logic system to be tested. The two non-overlapping pulses are a single pair of clock pulses which facilitate AC self-test timing analysis of the logic system.

  3. The excitation system - heart of an AC generator

    SciTech Connect (OSTI)

    Huey, C.L. [GE Hydro Projects, Portland, OR (United States); Gordon, D.H. [GE Hydro Projects, Auburn, WA (United States)

    1995-12-31T23:59:59.000Z

    The basic concepts of the excitation system are reviewed. Different types of systems are discussed from the very early systems to the state of the art systems. Operation and maintenance are described. Performance characteristics and means of measuring performance are described. The discussions are of a general nature and thus can be applicable to all prime mover applications, such as hydraulic turbine, gas turbine, and steam turbine driven units. This paper was written from a practical viewpoint in maintaining and adjusting an excitation system.

  4. Improving the dynamic performance of a complex AC/DC system by HVDC control modifications

    SciTech Connect (OSTI)

    Hammad, A.E. (ABB Power Systems, Baden (CH)); Gagnon, J. (Hydro Quebec, Montreal (CA)); McCallum, D. (IREQ, Montreal (CA))

    1990-10-01T23:59:59.000Z

    The power system of Hydro-Quebec has a peak load of approximately 27 GW. The great distance between the production sites and the load centers introduces stability limitations, which is the reason why the Quebec grid cannot be economically synchronized (through ac transmission with limited capacity) with the U.S. northeastern network. Power exports are therefore dependent on the use of HVDC links of which Hydro-Quebec now possesses five, for a capacity of over 2600 MW. Such a capacity will again soon increase. At the moment, the Chateauguay scheme has the largest HVDC capacity. It transfers 1000 MW by means of two Back-to-Back converter blocks. Various automatic control systems are installed on the Chateauguay scheme owing to the fact that a single circuit of a 765 kV ac line transmits the output of both the HVDC converter stations as well as the output from Beauharnois hydro generating station. Such controls have performed satisfactorily since 1984. However, a remarkable improvement of the overall ac/dc system dynamic performance can be gained by making certain modifications in some of these HVDC system controls. This paper presents the salient features of such control modifications, currently under consideration, using the results of an investigation by digital and analogue simulations that demonstrate the achieved improvements.

  5. Protecting a HVDC link against accidental isolation from its receiving AC system

    SciTech Connect (OSTI)

    Whitehouse, R.S. (GEC Alsthom Transmission and Distribution Projects Ltd., Stafford (United Kingdom))

    1993-07-01T23:59:59.000Z

    When an HVdc scheme is isolated from its receiving ac system, the inverter may continue to operate, generating its own ac bus voltages; this is defined here as islanding. If islanding is allowed to continue unrestricted, then main circuit components may in some conditions be damaged and it is therefore necessary to provide a suitable protection system. This paper outlines the protection scheme developed for the McNeill Back-to-Back HVdc link in Alberta, Canada, to prevent damage due to islanding while still permitting the link to automatically restart on reclosure of the isolating breaker. Oscillograms showing the protection in operation on both the GEC ALSTHOM HVdc simulator and during tests carried out as part of the commissioning of the McNeill HV dc link are included.

  6. A High Frequency Isolated Current-fed Bidirectional DC/AC Converter For Grid-Tied Energy Storage System

    E-Print Network [OSTI]

    King Jet, TSENG

    2013-01-01T23:59:59.000Z

    tied energy storage systems (ESS) will be voltage to a high-DC/AC converter to interface ESS based on low voltage cellscharging and discharging of the ESS and the control strategy

  7. Bond graph models of electromechanical systems. The AC generator case

    E-Print Network [OSTI]

    Batlle, Carles

    . After reviewing electromechanical energy conversion and torque gener- ation, the core element present in any electromechanical system is introduced, and the corresponding electrical and mechanical ports are attached to it. No modulated elements are necessary, since the energy representation

  8. Measured Savings of DC to AC Drive Retrofit in Plastic Extrusion

    E-Print Network [OSTI]

    Sfeir, R. A.

    2008-01-01T23:59:59.000Z

    This paper presents the potential electrical energy efficiency improvements for utilizing alternating current (AC) motors controlled by variable frequency drives (VFD) in place of direct current (DC) motors to drive plastic extrusion machines. A...

  9. Comparison of the Accuracy and Speed of Transient Mobile A/C System Simulation Models: Preprint

    SciTech Connect (OSTI)

    Kiss, T.; Lustbader, J.

    2014-03-01T23:59:59.000Z

    The operation of air conditioning (A/C) systems is a significant contributor to the total amount of fuel used by light- and heavy-duty vehicles. Therefore, continued improvement of the efficiency of these mobile A/C systems is important. Numerical simulation has been used to reduce the system development time and to improve the electronic controls, but numerical models that include highly detailed physics run slower than desired for carrying out vehicle-focused drive cycle-based system optimization. Therefore, faster models are needed even if some accuracy is sacrificed. In this study, a validated model with highly detailed physics, the 'Fully-Detailed' model, and two models with different levels of simplification, the 'Quasi-Transient' and the 'Mapped- Component' models, are compared. The Quasi-Transient model applies some simplifications compared to the Fully-Detailed model to allow faster model execution speeds. The Mapped-Component model is similar to the Quasi-Transient model except instead of detailed flow and heat transfer calculations in the heat exchangers, it uses lookup tables created with the Quasi-Transient model. All three models are set up to represent the same physical A/C system and the same electronic controls. Speed and results of the three model versions are compared for steady state and transient operation. Steady state simulated data are also compared to measured data. The results show that the Quasi-Transient and Mapped-Component models ran much faster than the Fully-Detailed model, on the order of 10- and 100-fold, respectively. They also adequately approach the results of the Fully-Detailed model for steady-state operation, and for drive cycle-based efficiency predictions

  10. Chapter 24: Alternating-Current Circuits 2. The voltage in the European wall socket oscillates between the positive and negative peak voltages, resulting in an rms

    E-Print Network [OSTI]

    Kioussis, Nicholas

    1 Chapter 24: Alternating-Current Circuits 2. The voltage in the European wall socket oscillates 240 V 340 VV V 6. A light bulb dissipates power as the voltage oscillates across its filament.0 V 1.32 A 15.2 V I X 13. An oscillating voltage drives an alternating current through a capacitor

  11. Method and system for an on-chip AC self-test controller

    DOE Patents [OSTI]

    Flanagan, John D. (Rhinebeck, NY); Herring, Jay R. (Poughkeepsie, NY); Lo, Tin-Chee (Fishkill, NY)

    2008-09-30T23:59:59.000Z

    A method and system for performing AC self-test on an integrated circuit that includes a system clock for use during normal operation are provided. The method includes applying a long data capture pulse to a first test register in response to the system clock, applying an at speed data launch pulse to the first test register in response to the system clock, inputting the data from the first register to a logic path in response to applying the at speed data launch pulse to the first test register, applying an at speed data capture pulse to a second test register in response to the system clock, inputting the logic path output to the second test register in response to applying the at speed data capture pulse to the second test register, and applying a long data launch pulse to the second test register in response to the system clock.

  12. Method and system for an on-chip AC self-test controller

    DOE Patents [OSTI]

    Flanagan, John D.; Herring, Jay R.; Lo, Tin-Chee

    2006-06-06T23:59:59.000Z

    A method for performing AC self-test on an integrated circuit, including a system clock for use during normal operation. The method includes applying a long data capture pulse to a first test register in response to the system clock, and further applying at an speed data launch pulse to the first test register in response to the system clock. Inputting the data from the first register to a logic path in response to applying the at speed data launch pulse to the first test register. Applying at speed data capture pulse to a second test register in response to the system clock. Inputting the output from the logic path to the second test register in response to applying the at speed data capture pulse to the second register. Applying a long data launch pulse to the second test register in response to the system clock.

  13. AC 2010-2361: REU PROGRAM IN TELEMATICS AND CYBER PHYSICAL SYSTEMS: SHARING STRATEGIES, EXPERIENCE AND LESSONS LEARNED

    E-Print Network [OSTI]

    Mahmud, Syed Masud

    AC 2010-2361: REU PROGRAM IN TELEMATICS AND CYBER PHYSICAL SYSTEMS: SHARING STRATEGIES, EXPERIENCE processing, embedded systems, in-vehicle networking, performance analysis of networking protocols, secure of Electrical and Computer Engineer of Wayne State University. His research interests lie in distributed

  14. Damping of a parallel ac-dc power system using PID power system stabilizers and rectifier current regulators

    SciTech Connect (OSTI)

    Hsu, Y.Y.; Wang, L. (Dept. of Electrical Engineering, National Taiwan Univ., Taipei (TW))

    1988-09-01T23:59:59.000Z

    A novel approach is presented to improve the dynamic stability of a parallel AC-DC power system. The developed scheme employs a proportional-integral-derivative (PID) power system stabilizer (PSS) and a PID rectifier current regulator (RCR) to enhance the damping for the electromagnetical mode of the system. The parameters of the proposed PID controllers are determined using a unified approach based on modal control theory. Eigenvalue analyses are performed for the system under various operating conditions in order to compare the damping effects provided by the two different control schemes. To demonstrate the effectiveness of the proposed damping schemes under disturbance conditions simulated dynamic response tests based on a nonlinear system model are also performed.

  15. Dynamic performance of static and synchronous compensators at an HVDC inverter bus in a very weak AC system

    SciTech Connect (OSTI)

    Nayak, O.B.; Gole, A.M. (Univ. of Manitoba, Winnipeg (Canada)); Chapman, D.G.; Davies, J.B. (Manitoba Hydro, Winnipeg (Canada))

    1994-08-01T23:59:59.000Z

    This paper discusses the performance of dynamic voltage control devices at the inverters of very weak ac systems. The types of compensation considered are: (a) static var compensator (SVC), (b) synchronous compensator (SC), (c) a mix of the two and (d) fixed capacitors. Although the primary purpose of these compensators is to control voltage at the ac bus, their dynamic performance during system disturbances is a very important factor. The investigation includes the behavior of the various voltage control options under ac and dc disturbances. The paper shows that the SVC has the fastest response for load rejection type of overvoltages, but can cause serious problems with recovery during undervoltages caused by single phase faults. The CIGRE benchmark model for HVdc control studies has been modified and used in this study. In particular the effect of local load has been included.

  16. Simple uniaxial pressure device for ac-susceptibility measurements suitable for closed cycle refrigerator system

    SciTech Connect (OSTI)

    Arumugam, S.; Manivannan, N.; Murugeswari, A. [High Pressure Low Temperature Lab, School of Physics, Bharathidasan University, Tiruchirappalli 620 024 (India)

    2007-06-15T23:59:59.000Z

    A simple design of the uniaxial pressure device for the measurement of ac-susceptibility at low temperatures using closed cycle refrigerator system is presented for the first time. This device consists of disc micrometer, spring holder attachment, uniaxial pressure cell, and the ac-susceptibility coil wound on stycast bobbin. It can work under pressure till 0.5 GPa and at the temperature range of 30-300 K. The performance of the system at ambient pressure is tested and calibrated with standard paramagnetic salts [Gd{sub 2}O{sub 3}, Er{sub 2}O{sub 3}, and Fe(NH{sub 4}SO{sub 4}){sub 2}6H{sub 2}O], Fe{sub 3}O{sub 4}, Gd metal, Dy metal, superconductor (YBa{sub 2}Cu{sub 3}O{sub 7}), manganite (La{sub 1.85}Ba{sub 0.15}MnO{sub 3}), and spin glass material (Pr{sub 0.8}Sr{sub 0.2}MnO{sub 3}). The performance of the uniaxial pressure device is demonstrated by investigating the uniaxial pressure dependence of La{sub 1.85}Ba{sub 0.15}MnO{sub 3} single crystal with P parallel c axis. The Curie temperature (T{sub c}) decreases as a function of pressure with P parallel c axis (dT{sub c}/dP{sub parallelcaxis}=-11.65 K/GPa) up to 46 MPa. The design is simple, is user friendly, and does not require pressure calibration. Measurement can even be made on thin and small size oriented crystals. The failure of the coil is remote under uniaxial pressure. The present setup can be used as a multipurpose uniaxial pressure device for the measurement of Hall effect and thermoelectric power with a small modification in the pressure cell.

  17. Utility-Interconnected Photovoltaic Systems: Evaluating the Rationale for the Utility-Accessible External Disconnect Switch

    SciTech Connect (OSTI)

    Coddington, M.; Margolis, R.M.; Aabakken, J.

    2008-01-01T23:59:59.000Z

    The utility-accessible alternating current (AC) external disconnect switch (EDS) for distributed generators, including photovoltaic (PV) systems, is a hardware feature that allows a utility?s employees to manually disconnect a customer-owned generator from the electricity grid. This paper examines the utility-accessible EDS debate in the context of utility-interactive PV systems for residential and small commercial installations. It also evaluates the rationale for EDS requirements.

  18. An ultra low-noise AC beam transformer and digital signal processing system for CERN's ELENA ring

    E-Print Network [OSTI]

    Angoletta, M E; Caspers, F; Federmann, S; Molendijk, J; Pedersen, F; Sanchez-Quesada, J

    2013-01-01T23:59:59.000Z

    CERNís Extra Low ENergy Antiproton (ELENA) ring is a new synchrotron that will be commissioned in 2016 to further decelerate the antiprotons coming from CERNís Antiproton Decelerator (AD). Essential longitudinal diagnostics required for commissioning and operation include the intensity measurement for bunched and debunched beams and the measurement of p/p for debunched beams to assess the electron cooling performance. The beam phase information is also needed by the Low-Level RF (LLRF) system. The baseline system for providing the required beam parameters and signals is based upon two ultra-low-noise AC beam transformers and associated digital signal processing. The AC beam transformers cover different frequency regions and are an adaptation to the ELENA layout of those used in the AD. Two AC beam transformers will also be installed in the extraction lines to provide beam intensity measurements. The digital signal processing will be carried out with the leadingedge hardware family used for ELENAís L...

  19. AC and DC power transmission

    SciTech Connect (OSTI)

    Not Available

    1985-01-01T23:59:59.000Z

    The technical and economic assessment of AC and DC transmission systems; long distance transmission, cable transmission, system inter-connection, voltage support, reactive compensation, stabilisation of systems; parallel operation of DC links with AC systems; comparison between alternatives for particular schemes. Design and application equipment: design, testing and application of equipment for HVDC, series and shunt static compensated AC schemes, including associated controls. Installations: overall design of stations and conductor arrangements for HVDC, series and shunt static AC schemes including insulation co-ordination. System analysis and modelling.

  20. System and method for motor speed estimation of an electric motor

    DOE Patents [OSTI]

    Lu, Bin (Kenosha, WI); Yan, Ting (Brookfield, WI); Luebke, Charles John (Sussex, WI); Sharma, Santosh Kumar (Viman Nagar, IN)

    2012-06-19T23:59:59.000Z

    A system and method for a motor management system includes a computer readable storage medium and a processing unit. The processing unit configured to determine a voltage value of a voltage input to an alternating current (AC) motor, determine a frequency value of at least one of a voltage input and a current input to the AC motor, determine a load value from the AC motor, and access a set of motor nameplate data, where the set of motor nameplate data includes a rated power, a rated speed, a rated frequency, and a rated voltage of the AC motor. The processing unit is also configured to estimate a motor speed based on the voltage value, the frequency value, the load value, and the set of nameplate data and also store the motor speed on the computer readable storage medium.

  1. Comparison of Two Autonomous AC-DC Converters for Piezoelectric Energy Scavenging Systems

    E-Print Network [OSTI]

    Boyer, Edmond

    be very low, the conversion should be as efficient as possible. The paper describes an active AC that they harvest. To reduce and to optimize their power consumption a bias circuit has been designed to make technology. The performances of the two solutions were compared with the ones of a passive Schottky based

  2. E-Print Network 3.0 - ac power systems Sample Search Results

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

    Engineering, University of Tennessee Collection: Engineering 3 EC417: Electric Energy Systems: Adapting to Renewable Resources Description: This course will present a detailed...

  3. E-Print Network 3.0 - ac dipole system Sample Search Results

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

    interactions for quantum logic with neutral atoms Gavin K. Brennen and Ivan H. Deutsch Summary: coordinate probability distribution of the dipoles. We consider a system of...

  4. E-Print Network 3.0 - ac propulsion system Sample Search Results

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

    and Electronic Engineering, University of Manchester Collection: Engineering 9 IAC-05-B5.6.B.04 SELF-ASSEMBLING WIRELESS AUTONOMOUSLY Summary: to a system with up to 3...

  5. VOLTAGE COLLAPSE AND TRANSIENT ENERGY FUNCTION ANALYSES OF AC/DC SYSTEMS

    E-Print Network [OSTI]

    Ca√Īizares, Claudio A.

    for power system dynamic models, including a third order representation of high voltage direct current (HVDC power limits, HVDC firing angle limits and voltage dependent current order limits (VDCOL) are shown the derivation of individual component Lyapunov functions for simplified models of HVDC links connected

  6. Decision making in fuzzy discrete event systems F. Lin a,c,*, H. Ying a

    E-Print Network [OSTI]

    Lin, Feng

    includes a FDES decision model, a fuzzy objective generator for generating optimal control objectives Elsevier Inc. All rights reserved. Keywords: Discrete event systems; Fuzzy logic; Decision making; HIV ``good'' to ``bad''. For such applications, we need to introduce fuzzy logic to DES. In a conference

  7. AC System Equipment Specification, Installation and Operational Options for Improved Indoor Humidity Control

    E-Print Network [OSTI]

    Shirey, D. B.

    of 80?F (26.7?C) dry-bulb temperature and 67?F (19.4?C) wet-bulb temperature air entering the indoor unit (AHRI 2006), the equipment SHRs range from 0.67 to 0.8. Thus, the dehumidification fraction (one minus SHR) varies from 0.2 (20%) to 0.33 (33... Building Systems in Hot and Humid Climates, Plano, TX, December 15-17, 2008 Figure 3. Latent Capacity Degradation with Supply Air Fan Overrun at Reduced Air Flow compressor on cycle (Shirey et al. 2006). The plotted lines are results from a...

  8. The HST/ACS+WFC3 Survey for Lyman Limit Systems II: Science

    E-Print Network [OSTI]

    O'Meara, John M; Worseck, Gabor; Chen, Hsiao-Wen; Madau, Piero

    2012-01-01T23:59:59.000Z

    We present the first science results from our Hubble Space Telescope Survey for Lyman limit absorption systems (LLS) using the low dispersion spectroscopic modes of the Advanced Camera for Surveys and the Wide Field Camera 3. Through an analysis of 71 quasars, we determine the incidence frequency of LLS per unit redshift and per unit path length, l(z) and l(x) respectively, over the redshift range 1 stacked spectrum analysis, we determine a median (mean) value of the mean free path to ionizing radiation at z=2.4 of lambda_mfp = 243(252)h^(-1) Mpc, with an error on the mean value of +/- 43h^(-1) Mpc. We also re-evaluate the estimates of lambda_mfp from Prochaska et al. (2009) and place constraints on the evolution of lambda_mfp with redshift, including an estimate of the "breakthrough" redshift of z = 1.6. Consistent with results at higher z, we...

  9. RHIC spin flipper AC dipole controller

    SciTech Connect (OSTI)

    Oddo, P.; Bai, M.; Dawson, C.; Gassner, D.; Harvey, M.; Hayes, T.; Mernick, K.; Minty, M.; Roser, T.; Severino, F.; Smith, K.

    2011-03-28T23:59:59.000Z

    The RHIC Spin Flipper's five high-Q AC dipoles which are driven by a swept frequency waveform require precise control of phase and amplitude during the sweep. This control is achieved using FPGA based feedback controllers. Multiple feedback loops are used to and dynamically tune the magnets. The current implementation and results will be presented. Work on a new spin flipper for RHIC (Relativistic Heavy Ion Collider) incorporating multiple dynamically tuned high-Q AC-dipoles has been developed for RHIC spin-physics experiments. A spin flipper is needed to cancel systematic errors by reversing the spin direction of the two colliding beams multiple times during a store. The spin flipper system consists of four DC-dipole magnets (spin rotators) and five AC-dipole magnets. Multiple AC-dipoles are needed to localize the driven coherent betatron oscillation inside the spin flipper. Operationally the AC-dipoles form two swept frequency bumps that minimize the effect of the AC-dipole dipoles outside of the spin flipper. Both AC bumps operate at the same frequency, but are phase shifted from each other. The AC-dipoles therefore require precise control over amplitude and phase making the implementation of the AC-dipole controller the central challenge.

  10. Solid State AC Motor Drives - Conservation Perspectives

    E-Print Network [OSTI]

    Mohan, N.; Ferraro, R. J.

    1982-01-01T23:59:59.000Z

    This paper presents and discusses techniques for energy conservation by reducing losses in ac motor driven systems, proposed by the technical community in response to surging cost of energy. An important aspect considered is the impact on electric...

  11. Plasma generators, reactor systems and related methods

    DOE Patents [OSTI]

    Kong, Peter C. (Idaho Falls, ID); Pink, Robert J. (Pocatello, ID); Lee, James E. (Idaho Falls, ID)

    2007-06-19T23:59:59.000Z

    A plasma generator, reactor and associated systems and methods are provided in accordance with the present invention. A plasma reactor may include multiple sections or modules which are removably coupled together to form a chamber. Associated with each section is an electrode set including three electrodes with each electrode being coupled to a single phase of a three-phase alternating current (AC) power supply. The electrodes are disposed about a longitudinal centerline of the chamber and are arranged to provide and extended arc and generate an extended body of plasma. The electrodes are displaceable relative to the longitudinal centerline of the chamber. A control system may be utilized so as to automatically displace the electrodes and define an electrode gap responsive to measure voltage or current levels of the associated power supply.

  12. Lowering of the firing voltage and reducing of the discharge delay time in alternating current plasma display panels by a discontinuous spin-coated LaB{sub 6} film on the MgO protective layer

    SciTech Connect (OSTI)

    Deng, Jiang, E-mail: dj78291@163.com [School of Physical Electronic, University of Electronic Science and Technology of China, No.4, Section 2, Jianshe North Road, 610054 Chengdu (China)] [School of Physical Electronic, University of Electronic Science and Technology of China, No.4, Section 2, Jianshe North Road, 610054 Chengdu (China); Zeng, Baoqing [School of Physical Electronic, University of Electronic Science and Technology of China, No.4, Section 2, Jianshe North Road, 610054 Chengdu (China) [School of Physical Electronic, University of Electronic Science and Technology of China, No.4, Section 2, Jianshe North Road, 610054 Chengdu (China); Zhongshan Institute, University of Electronic Science and Technology of China, 528402 zhongshan (China); Wang, Xiaoju; Lin, Zulun; Qi, Kangcheng; Cao, Guichuan [School of Opto-electronic Information, University of Electronic Science and Technology of China, No.4, Section 2, Jianshe North Road, 610054 Chengdu (China)] [School of Opto-electronic Information, University of Electronic Science and Technology of China, No.4, Section 2, Jianshe North Road, 610054 Chengdu (China)

    2014-03-15T23:59:59.000Z

    A spin coated LaB{sub 6} discontinuous film is covered on MgO protective layer to improve the discharge performance of alternating current plasma display panels. Under the premise of high transmittance of more than 90%, a very small amount of polycrystal LaB{sub 6} powders added in an organic solvent are chosen as the coating solution. The discharge characteristics results show that with 250 torr 5% Xe-Ne pressure, the firing voltage and discharge delay time of the test panel with LaB{sub 6}/MgO double protective layer are decreased by 13.4% and 36.5%, respectively, compared with that of conventional MgO protective layer, likely owing to the low work function of LaB{sub 6.} Furthermore, the aging time of the proposed structure is comparable to that of pure MgO protective layer. Therefore, it will not increase the production costs and is highly suitable to be applied for alternating current plasma display panels with low electrical power consumption.

  13. A High Frequency Isolated Current-fed Bidirectional DC/AC Converter For Grid-Tied Energy Storage System

    E-Print Network [OSTI]

    King Jet, TSENG

    2013-01-01T23:59:59.000Z

    for Grid-tied Energy Storage System XhaFreh qu, K.J. uneng,grid-tied energy storage systems (ESS) will be voltage to aGrid-tied energy storage system (ESS) is increasingly used

  14. A Policy Management System for Ambient Networks K. Jean and A. Galis, {kjean, agalis}@ee.ucl.ac.uk,

    E-Print Network [OSTI]

    Haddadi, Hamed

    A Policy Management System for Ambient Networks K. Jean and A. Galis, {kjean, agalis of Ambient Networks necessitate a new dynamic, distributed policy management system. Existing policy management systems do not provide the required support for mobility, dynamicity and heterogeneity

  15. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: FUNDAMENTAL THEORY AND APPLICATIONS, VOL. 49, NO. 5, MAY 2002 621 Modeling of PWM Inverter-Supplied AC Drives

    E-Print Network [OSTI]

    Stankoviæ, Aleksandar

    . The fundamental frequency of this waveform is adjusted to produce the desired speed. In modern electric drives, MAY 2002 621 Modeling of PWM Inverter-Supplied AC Drives at Low Switching Frequencies T. A. Sakharuk in ac drives supplied by pulsewidth modulated (PWM) power electronic inverters. Specifically, the paper

  16. Personal Web Archive: E-mail: waka@iplab.cs.tsukuba.ac.jp, {shizuki,jiro}@cs.tsukuba.ac.jp

    E-Print Network [OSTI]

    Tanaka, Jiro

    Personal Web Archive: Web E-mail: waka@iplab.cs.tsukuba.ac.jp, {shizuki,jiro}@cs.tsukuba.ac.jp Web Web Web Web Web Web Personal Web Archive Personal Web Archive: Support System for Browsing the Versions of Web Page Ryota WAKAMATSU Buntarou SHIZUKI Jiro TANAKA Graduate School of Systems

  17. A Generalized Class of Stationary Frame-Current Controllers for Grid-Connected ACĖDC 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 ...

  18. EC417 --Electric Energy, Adapting to Renewable Resources Brief History of Power Systems (the great AC-DC battle)

    E-Print Network [OSTI]

    EC417 -- Electric Energy, Adapting to Renewable Resources Fall 2014 Topics: · Brief History on renewables (solar, wind, fuel cells, biomass) · Analysis methods for 3-phase systems · Real and Reactive to the introduction of renewables (Photovoltaics, wind, etc.) · Development of the "Smart Grid" · Electric Vehicles

  19. Construction of AC Motor Controllers for NOvA Experiment Upgrades

    SciTech Connect (OSTI)

    Cooley, Patrick; /Fermilab; ,

    2011-08-04T23:59:59.000Z

    I have been constructing Alternating Current (AC) motor controllers for manipulation of particle beam detectors. The capability and reliability of these motor controllers are essential to the Laboratory's mission of accurate analysis of the particle beam's position. The device is moved in and out of the beam's path by the motor controller followed by the Neutrinos at the Main Injector Off-Axis {nu}{sub e} Appearance (NOvA) Experiment further down the beam pipe. In total, I built and tested ten ac motor controllers for new beam operations in the NOvA experiment. These units will prove to be durable and provide extremely accurate beam placement for NOvA Experiment far into the future.

  20. arizona state university: Topics by E-print Network

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

    Ye, Jieping 231 ARIZONA STATE UNIVERSITY POWER SYSTEMS ENGINEERING RESEARCH CENTER Power Transmission, Distribution and Plants Websites Summary: and alternating current (AC)...

  1. Notice of Availability of Plains & Eastern Clean Line Transmission...

    Energy Savers [EERE]

    in Oklahoma and Tennessee; an approximately 720-mile high voltage direct current (HVDC) transmission line; an alternating current (AC) collection system; and access roads....

  2. Technical Report NCRG/98/002, available from http://www.ncrg.aston.ac.uk/ To appear in Advances in Neural Information Processing Systems 10

    E-Print Network [OSTI]

    Edinburgh, University of

    .k.i.williams@aston.ac.uk Christopher M. Bishop Microsoft Research St. George House 1 Guildhall Street Cambridge, CB2 3NH, UK cmbishop) it is necessary to use approximations or Markov chain Monte Carlo (MCMC) meth­ ods. Rasmussen (1996) has

  3. CD54AC04, CD74AC04 HEX INVERTERS

    E-Print Network [OSTI]

    Kretchmar, R. Matthew

    ¬įC to 125¬įC SOIC M Tube CD74AC04M AC04M¬≠55¬įC to 125¬įC SOIC ¬≠ M Tape and reel CD74AC04M96 AC04M CDIP-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance

  4. IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 7, NO. 2, MAY 1992, PP. 673 683. POINT OF COLLAPSE METHODS APPLIED TO AC DC POWER SYSTEMS

    E-Print Network [OSTI]

    Ca√Īizares, Claudio A.

    -node bifurcations in power systems including high voltage direct current HVDC transmission. Bus voltage pro les, become plausible when the dynamics for the HVDC system are included. Keywords: Voltage collapse, HVDC the subject of increasing study over the past few years 1 . Furthermore, the relative wide spread use of HVDC

  5. 436 IEEE/ASME TRANSACTIONS ON MECHATRONICS, VOL. 9, NO. 2, JUNE 2004 Torque and Velocity Ripple Elimination of AC

    E-Print Network [OSTI]

    Qiu, Li

    Elimination of AC Permanent Magnet Motor Control Systems Using the Internal Model Principle Wai-Chuen Gan and velocity ripple elimination in AC permanent magnet (PM) motor control systems. The torque ripples caused-free output response. Index Terms--AC permanent magnet motor, gain scheduled (GS) speed regulators, internal

  6. acs morphological study: Topics by E-print Network

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

    (more) Yang, Emma Yunyi 2013-01-01 29 Study of supplementary controls for embedded HVDC links in a AC power system. Open Access Theses and Dissertations Summary: ??This...

  7. E-Print Network 3.0 - ac railway power-line Sample Search Results

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

    Information Sciences 17 MEASUREMENT AND ANALYSIS OF ELECTROMAGNETIC FIELDS FROM TRAMS, TRAINS AND HYBRID CARS Summary: (AC or DC). Railway safety signalling systems also use...

  8. Ac-Ac Dual Active Bridge Converter for Solid State Transformer

    E-Print Network [OSTI]

    Kimball, Jonathan W.

    flow. The advantages of direct ac-ac conversion include fewer power conversion stages and minimized single-stage direct ac-ac power conversion to an SST. Fewer conversion stages reduce conduction loss) converter in direct ac-ac power conversion. Like a DAB converter as dc-dc power supply in [5] and [6

  9. A Multi-Level Grid Interactive Bi-directional AC/DC-DC/AC Converter and a Hybrid Battery/Ultra-capacitor Energy Storage System with Integrated Magnetics for Plug-in Hybrid Electric Vehicles

    SciTech Connect (OSTI)

    Onar, Omer C [ORNL] [ORNL

    2011-01-01T23:59:59.000Z

    This study presents a bi-directional multi-level power electronic interface for the grid interactions of plug-in hybrid electric vehicles (PHEVs) as well as a novel bi-directional power electronic converter for the combined operation of battery/ultracapacitor hybrid energy storage systems (ESS). The grid interface converter enables beneficial vehicle-to-grid (V2G) interactions in a high power quality and grid friendly manner; i.e, the grid interface converter ensures that all power delivered to/from grid has unity power factor and almost zero current harmonics. The power electronic converter that provides the combined operation of battery/ultra-capacitor system reduces the size and cost of the conventional ESS hybridization topologies while reducing the stress on the battery, prolonging the battery lifetime, and increasing the overall vehicle performance and efficiency. The combination of hybrid ESS is provided through an integrated magnetic structure that reduces the size and cost of the inductors of the ESS converters. Simulation and experimental results are included as prove of the concept presenting the different operation modes of the proposed converters.

  10. * jafleeman@aep.com EHV AC and HVDC Transmission Working Together to Integrate Renewable Power

    E-Print Network [OSTI]

    McCalley, James D.

    * jafleeman@aep.com EHV AC and HVDC Transmission Working Together to Integrate Renewable Power J. A current (EHV AC) and high voltage direct current (HVDC) transmission systems and advocates a hybrid as a high capacity platform for system integration. HVDC transmission offers express, efficient delivery

  11. www.eprg.group.cam.ac.uk EPRGWORKINGPAPER

    E-Print Network [OSTI]

    Aickelin, Uwe

    www.eprg.group.cam.ac.uk EPRGWORKINGPAPER Abstract Reforming Small Power Systems under Political Nepal and Tooraj Jamasb This paper assesses the electricity sector reforms across small power systems make power sector reform in Nepal and similar small systems a more complex process. As international

  12. AC resistance measuring instrument

    DOE Patents [OSTI]

    Hof, P.J.

    1983-10-04T23:59:59.000Z

    An auto-ranging AC resistance measuring instrument for remote measurement of the resistance of an electrical device or circuit connected to the instrument includes a signal generator which generates an AC excitation signal for application to a load, including the device and the transmission line, a monitoring circuit which provides a digitally encoded signal representing the voltage across the load, and a microprocessor which operates under program control to provide an auto-ranging function by which range resistance is connected in circuit with the load to limit the load voltage to an acceptable range for the instrument, and an auto-compensating function by which compensating capacitance is connected in shunt with the range resistance to compensate for the effects of line capacitance. After the auto-ranging and auto-compensation functions are complete, the microprocessor calculates the resistance of the load from the selected range resistance, the excitation signal, and the load voltage signal, and displays of the measured resistance on a digital display of the instrument. 8 figs.

  13. AC 2010-343: NASA SENIOR DESIGN: MISSION ASSURANCE MANAGEMENT ENVIRONMENT

    E-Print Network [OSTI]

    Conrad, James M.

    this challenge, we propose to improve spacecraft building and operating processes with integrated software, design, implementation, system integration, validation and test. Identification of System RequirementsAC 2010-343: NASA SENIOR DESIGN: MISSION ASSURANCE MANAGEMENT ENVIRONMENT Jiang Guo, California

  14. An Annotated Bibliography of High-Voltage Direct-Current Transmission and Flexible AC Transmission (FACTS) Devices, 1991-1993.

    SciTech Connect (OSTI)

    Litzenberger, Wayne; Lava, Val

    1994-08-01T23:59:59.000Z

    References are contained for HVDC systems, converter stations and components, overhead transmission lines, cable transmission, system design and operations, simulation of high voltage direct current systems, high-voltage direct current installations, and flexible AC transmission system (FACTS).

  15. Control of Parallel-Connected Bidirectional AC-DC Converters in Stationary Frame for Microgrid

    E-Print Network [OSTI]

    Teodorescu, Remus

    Control of Parallel-Connected Bidirectional AC-DC Converters in Stationary Frame for Microgrid-- With the penetration of renewable energy in modern power system, microgrid has become a popular application worldwide. In this paper, parallel-connected bidirectional converters for AC and DC hybrid microgrid application

  16. The Hybrid Power Flow Controller A New Concept for Flexible AC Transmission

    E-Print Network [OSTI]

    Lehn, Peter W.

    The Hybrid Power Flow Controller A New Concept for Flexible AC Transmission Jovan Z. Bebic Electric flow controller topologies are proposed for flexible AC transmission systems (FACTS). The first one or series capacitors can be enhanced to generalized power flow control ­ a functionality commonly associated

  17. ForReview.Confidential-ACS Plantwide Control to Economic Optimum of a Recycle

    E-Print Network [OSTI]

    Skogestad, Sigurd

    ForReview.Confidential-ACS Plantwide Control to Economic Optimum of a Recycle Process with Side #12;ForReview.Confidential-ACS Plantwide Control to Economic Optimum of a Recycle Process with Side, Trondheim N7491, Norway Abstract Plantwide control system design for economically optimum operation

  18. AC PV Modules Take a standard DC PV module and connect a microinverter

    E-Print Network [OSTI]

    Johnson, Eric E.

    modules. These inverters range in power from 700 watts up to 1 megawatt. DC maximum system voltages can and up to 13 inverters for the 210 W version to be installed on the same AC output cable. home power 136, and secure a listing to UL1741 for a pre-assembled module/inverter device, and you have an AC PV module

  19. Program plan for research and development of HVDC power systems and components

    SciTech Connect (OSTI)

    Not Available

    1984-01-01T23:59:59.000Z

    The Division of Electric Energy Systems (EES) of the US Department of Energy (DOE) has formulated a program for research and development (R and D) of high-voltage direct-current (HVDC) power transmission and delivery systems and associated dc components. The program includes analysis of future utility system applications, development of new HVDC control and protection concepts, and advanced dc component research. The structure of this program will provide an appropriate balance between mid- and long-term options for the enhancement of HVDC power transmission and delivery for future electric power systems. This HVDC research program is intended to further develop and improve an important energy transport technology, one that will offer many opportunities to reduce future energy costs. The economics and operating constraints in alternating-current (ac) solutions strongly indicate that new HVDC technology options will be advantageous and will provide an enhanced ability to use generation and transmission system resources efficiently and economically in existing electric energy systems. Studies show that further development of this technology will lead to significant integration of new HVDC techniques into existing electric energy systems with appreciable economic and technical benefit. The R and D proposed in this HVDC Program Plan will be of substantial value to future electric power systems.

  20. Numerical solution of a two-scale system for concrete corrosion in sewer pipes Vladimir Chalupecky (chalupecky@math.kyushu-u.ac.jp) Faculty of Mathematics, Kyushu University

    E-Print Network [OSTI]

    Ishii, Hitoshi

    of aggressive compounds like sulfuric acid. Concrete is a material with porous structure ¬≠ it can be viewedNumerical solution of a two-scale system for concrete corrosion in sewer pipes Vladim¬īir Chalupeck-diffusion (RD) systems mod- eling sulfate attack in concrete structures (here: sewer pipes). The systems

  1. Development of a 10 kW High Temperature High Power Density Three-Phase AC-DC-AC SiC Converter

    SciTech Connect (OSTI)

    Ning, Puqi [ORNL

    2012-01-01T23:59:59.000Z

    This paper presents the development and experimental performance of a 10 kW, all SiC, 250 C junction temperature high-power-density three-phase ac-dc-ac converter. The electromagnetic interference filter, thermal system, high temperature package, and gate drive design are discussed in detail. Finally, tests confirming the feasibility and validating the theoretical basis of the prototype converter system are described.

  2. Exchange 13/14 www.ed.ac.uk

    E-Print Network [OSTI]

    Herrmann, Samuel

    : Studyabroad@ed.ac.uk Outgoing Students: Sharyn Bennet Email: Erasmus.outgoing@ed.ac.uk Head of Study Abroad

  3. STFC Introductory Summer School m.j.owens@reading.ac.uk18 Sept 2012 Solar Variability and

    E-Print Network [OSTI]

    STFC Introductory Summer School m.j.owens@reading.ac.uk18 Sept 2012 Solar Variability and Climate · The climate system · Solar variability · Solar effects on climate ­ Regional and global effects · The future? #12;STFC Introductory Summer School m.j.owens@reading.ac.uk Climate system #12;The source of much

  4. www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY

    E-Print Network [OSTI]

    Aickelin, Uwe

    www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY Reforming Small Power Systems under Rabindra Nepal and Tooraj Jamasb The pioneering electricity sector reforms in developing Latin American of `successful and comprehensive electricity reforms' in many less-developed countries like Nepal. Nepal's power

  5. www.eprg.group.cam.ac.uk EPRGWORKINGPAPER

    E-Print Network [OSTI]

    Aickelin, Uwe

    www.eprg.group.cam.ac.uk EPRGWORKINGPAPER Abstract The Economics of the Nord Stream Pipeline System M. Reiner We calculate the total cost of building Nord Stream and compare its levelised unit cost of shipping through Nord Stream is clearly lower than using the Ukrainian route and is only

  6. www.eprg.group.cam.ac.uk EPRGWORKINGPAPER

    E-Print Network [OSTI]

    de Gispert, Adrià

    . The models are used to estimate the benefits of electricity locational marginal pricing (LMP) that arise fromwww.eprg.group.cam.ac.uk EPRGWORKINGPAPER Abstract Locational-based Coupling of Electricity Markets the effects of varying system characteristics on the magnitude of the locational-based unit commitment

  7. Efficiency Ratings for the Daiken AC (Americas), Inc.

    E-Print Network [OSTI]

    Efficiency Ratings for the Daiken AC (Americas), Inc. Altherma Air-to-Water Source Heat Pump System is used to provide water heating, the EF for that separate water heater shall be used for performance Description Model No. Capacity (tons) Space Heating Space Cooling SEER Water Heating Efficiency

  8. FAQ Hufige Fragen: Wie melde ich mich im System an? ber das ESS Portal https://ess.tuwien.ac.at (gleicher Zugang wie

    E-Print Network [OSTI]

    Szmolyan, Peter

    FAQ ¬≠ H√§ufige Fragen: ¬∑ Wie melde ich mich im System an? √?ber das ESS Portal https://ess Auf Grund von laufenden Wartungs- und Servicearbeiten im ESS-Portal bitten wir Sie , die Meldungen

  9. alternating current machines: Topics by E-print Network

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

    Websites Summary: mover speed is variable, such as in wind turbines. For variable speed operation one of the machine's stator windings is connected to the fixed frequency...

  10. alternating current impedance: Topics by E-print Network

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

    impedance tomography which seeks the electrical defects, such as cracks or voids, in metals 5, 6, 34, 63, 71, 129. Electrical impedance tomography has Borcea, Liliana 68...

  11. alternating current polarography: Topics by E-print Network

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

    rays is used. Photovoltaics currently relies on three technologies. Monocrystalline and polycrystalline cells are silicon-based. Thin-film cells use semi-conductor materials....

  12. alternating current: Topics by E-print Network

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

    rays is used. Photovoltaics currently relies on three technologies. Monocrystalline and polycrystalline cells are silicon-based. Thin-film cells use semi-conductor materials....

  13. alternating current calorimetry: Topics by E-print Network

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

    rays is used. Photovoltaics currently relies on three technologies. Monocrystalline and polycrystalline cells are silicon-based. Thin-film cells use semi-conductor materials....

  14. alternating current losses: Topics by E-print Network

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

    rays is used. Photovoltaics currently relies on three technologies. Monocrystalline and polycrystalline cells are silicon-based. Thin-film cells use semi-conductor materials....

  15. Contactless measurement of alternating current conductance in quantum Hall structures

    SciTech Connect (OSTI)

    Drichko, I. L.; Diakonov, A. M.; Malysh, V. A.; Smirnov, I. Yu.; Ilyinskaya, N. D.; Usikova, A. A. [A. F. Ioffe Physical-Technical Institute of the Russian Academy of Sciences, 194021 St. Petersburg (Russian Federation); Galperin, Y. M. [Department of Physics, University of Oslo, P.O. Box 1048 Blindern, 0316 Oslo (Norway); A. F. Ioffe Physical-Technical Institute of the Russian Academy of Sciences, 194021 St. Petersburg (Russian Federation); Kummer, M.; Kšnel, H. von [Laboratorium fŁr FestkŲrperphysik ETH ZŁrich, CH-8093 ZŁrich (Switzerland)

    2014-10-21T23:59:59.000Z

    We report a procedure to determine the frequency-dependent conductance of quantum Hall structures in a broad frequency domain. The procedure is based on the combination of two known probeless methodsóacoustic spectroscopy and microwave spectroscopy. By using the acoustic spectroscopy, we study the low-frequency attenuation and phase shift of a surface acoustic wave in a piezoelectric crystal in the vicinity of the electron (hole) layer. The electronic contribution is resolved using its dependence on a transverse magnetic field. At high frequencies, we study the attenuation of an electromagnetic wave in a coplanar waveguide. To quantitatively calibrate these data, we use the fact that in the quantum-Hall-effect regime the conductance at the maxima of its magnetic field dependence is determined by extended states. Therefore, it should be frequency independent in a broad frequency domain. The procedure is verified by studies of a well-characterized p-SiGe/Ge/SiGe heterostructure.

  16. Alternating Current Photovoltaic Building Block - Energy Innovation Portal

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICE OF RESEARCHThermal SolarAllocatioBasics ofSolar

  17. Web https://ms.ecc.utokyo.ac.jp/ (POP) popd.ecc.utokyo.ac.jp

    E-Print Network [OSTI]

    Katsumoto, Shingo

    ; 2 233 #12; (POP) popd.ecc.utokyo.ac.jp SSL995 (IMAP) imapd.ecc.utokyo.ac.jp SSL993 sbmsd.ecc.utokyo.ac.jp SSL465 @ 1. MailHosting D 2. 200MB 400MB 3. POPIMAP IMAPPOP 200MB400MB 3 233 #12;Thunderbird 3 4 233 #12; (POP) popd.ecc.utokyo.ac.jp SSL995 (IMAP) imapd.ecc.utokyo.ac.jp SSL993

  18. CD54AC08, CD74AC08 QUADRUPLE 2-INPUT POSITIVE-AND GATES

    E-Print Network [OSTI]

    Kretchmar, R. Matthew

    SOIC M Tube CD74AC08M AC08M¬≠55¬įC to 125¬įC SOIC ¬≠ M Tape and reel CD74AC08M96 AC08M CDIP ¬≠ F Tube CD54AC-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance

  19. E-Print Network 3.0 - ac electrokinetic funnel Sample Search...

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

    Page: << < 1 2 3 4 5 > >> 1 ME 141C MicroElectroMechanical Systems Introduction to Microfluidics & BioMEMS Summary: Velocimetry Slip flow boundary conditions Analysis of AC...

  20. Safety of high speed guided ground transportation systems: Comparison of magnetic and electric fields of conventional and advanced electrified transportation systems. Final report, September 1992-March 1993

    SciTech Connect (OSTI)

    Dietrich, F.M.; Feero, W.E.; Jacobs, W.L.

    1993-08-01T23:59:59.000Z

    Concerns exist regarding the potential safety, environmental and health effects on the public and on transportation workers due to electrification along new or existing rail corridors, and to proposed maglev and high speed rail operations. Therefore, the characterization of electric and magnetic fields (EMF) produced by both steady (dc) and alternating currents (ac) at power frequency (50 Hz in Europe and 60 Hz in the U.S.) and above, in the Extreme Low Frequency (ELF) range (3-3000 Hz) is of interest. The report summarizes and compares the results of a survey of EMF characteristics (spatial, temporal and frequency bands) for representative conventional railroad and transit and advanced high-speed systems including: the German TR-07 maglev system; the Amtrak Northeast Corridor (NEC) and North Jersey Transit (NJT) trains; the Washington, DC Metrorail (WMATA) and the Boston, MA (MBTA) transit systems; and the French TGV-A high speed rail system. This comprehensive comparative EMF survey produced both detailed data and statistical summaries of EMF profiles, and their variability in time and space. EMF ELF levels for WMATA are also compared to those produced by common environmental sources at home, work, and under power lines, but have specific frequency signatures.

  1. High SEER Residential AC

    SciTech Connect (OSTI)

    Hastbacka, Mildred; Dieckmann, John; Brodrick, James

    2012-07-31T23:59:59.000Z

    This article discusses the new offerings of residential air conditioning systems with very high Seasonal Energy Efficiency Ratio (SEER) ratings, the two regional areas dictating operations standards ("hot, humid" and "hot, dry"), and the potential energy savings these new systems can provide. The article concludes with a brief review of current market potential.

  2. Under Contract No. DE-AC36-83CH10093 LARGE-AREA, HIGH-INTENSITY PV ARRAYS FOR SYSTEMS USING DISH CONCENTRATING OPTICS

    E-Print Network [OSTI]

    J. S. Ward; A. Duda; K. Zweibel; T. J. Coutts; J. S. Ward; A. Duda; K. Zweibel; T. J. Coutts

    ABSTRACT: In this paper, we report on our efforts to fabricate monolithic interconnected modules (MIMs) using III-V semiconductors with bandgaps appropriate for the terrestrial solar spectrum. The small size of the component cells comprising the MIM allows for operation at extremely high flux densities and relaxes the requirement for a small spot-size to be generated by the optics. This makes possible a PV option for the large dish concentrator systems that have been developed by the solar thermal community for use with Stirling engines. Additionally, the highly effective back-surface reflector integrated into the MIM design is an effective tool for thermal management of the array. Development of this technology would radically alter the projections for PV manufacturing capacity because of the potential for extremely high power generation per unit area of semiconductor material.

  3. Measuring Advances in HVAC Distribution System Design

    E-Print Network [OSTI]

    Franconi, E.

    2011-01-01T23:59:59.000Z

    Advances in HV AC Distribution System Design Ellen FranconiAdvances in HVAC Distribution System Design Ellen Franconisavings result from distribution system design improvements,

  4. Designing PV Incentive Programs to Promote System Performance: A Review of Current Practice

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2006-01-01T23:59:59.000Z

    measurements of solar insolation and power output, and caneach systemís AC power output, solar insolation, and windof each systemís AC power output, solar insolation, and wind

  5. Design principle for improved three-dimensional ac electro-osmotic pumps Damian Burch and Martin Z. Bazant*

    E-Print Network [OSTI]

    Bazant, Martin Z.

    Design principle for improved three-dimensional ac electro-osmotic pumps Damian Burch and Martin Z-dimensional 3D ac electro-osmotic ACEO pumps have recently been developed that are much faster and more robust pumps are crucial components of lab-on-a- chip systems. There is growing interest in exploiting various

  6. Phase-locking of driven vortex lattices with transverse ac force and periodic pinning

    SciTech Connect (OSTI)

    Reichhardt, Charles; Kolton, Alejandro B.; Dominguez, Daniel; Gronbech-Jensen, Niels

    2001-10-01T23:59:59.000Z

    For a vortex lattice moving in a periodic array we show analytically and numerically that a new type of phase locking occurs in the presence of a longitudinal dc driving force and a transverse ac driving force. This phase locking is distinct from the Shapiro step phase locking found with longitudinal ac drives. We show that an increase in critical current and a fundamental phase-locked step width scale with the square of the driving ac amplitude. Our results should carry over to other systems such as vortex motion in Josephson-junction arrays.

  7. AC 95 - selected readings

    SciTech Connect (OSTI)

    NONE

    1995-12-31T23:59:59.000Z

    Reports are presented on energy efficiency and conservation in residential buildings. Topics include housing and energy linkages; the people factor; low-income initiatives; green visions; utility programs; affordable comfort; housing as a system; and pressures and air flow in buildings.

  8. Assessment of US electric vehicle programs with ac powertrains

    SciTech Connect (OSTI)

    Kevala, R.J. (Booz, Allen and Hamilton, Inc., Bethesda, MD (USA). Transportation Consulting Div.)

    1990-02-01T23:59:59.000Z

    AC powertrain technology is a promising approach to improving the performance of electric vehicles. Four major programs are now under way in the United States to develop ac powertrains: the Ford/General Electric single-shaft electric propulsion system (ETX-II), the Eaton dual-shaft electric propulsion system (DSEP), the Jet Propulsion Laboratories (JPL) integrated ac motor drive and recharge system, and the Massachusetts Institute of Technology (MIT) variable reluctance motor (VRM) drive. The JPL program is sponsored by EPRI; the other three programs are funded by the US Department of Energy. This preliminary assessment of the four powertrain programs focuses on potential performance, costs, safety, and commercial feasibility. Interviews with program personnel were supplemented by computer simulations of electric vehicle performance using the four systems. Each of the four powertrains appears superior to standard dc powertrain technology in terms of performance and weight. The powertrain technologies studied in this assessment are at varying degrees of technological maturity. One or more of the systems may be ready for incorporation into an advanced electric vehicle during the early 1990s. Each individual report will have a separate abstract. 5 refs., 37 figs., 29 tabs.

  9. CD54AC02, CD74AC02 QUADRUPLE 2-INPUT POSITIVE-NOR GATES

    E-Print Network [OSTI]

    Kretchmar, R. Matthew

    to 125¬įC SOIC ¬≠ M Tape and reel CD74AC02M96 AC02M CDIP ¬≠ F Tube CD54AC02F3A CD54AC02F3A Package drawings-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance

  10. CD54AC32, CD74AC32 QUADRUPLE 2-INPUT POSITIVE-OR GATES

    E-Print Network [OSTI]

    Kretchmar, R. Matthew

    Tape and reel CD74AC32M96 AC32M CDIP ­ F Tube CD54AC32F3A CD54AC32F3A Package drawings, standard-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance

  11. High frequency AC power converter for low voltage circuits

    E-Print Network [OSTI]

    Salazar, Nathaniel Jay Tobias

    2012-01-01T23:59:59.000Z

    This thesis presents a novel AC power delivery architecture that is suitable for VHF frequency (50-100MHz) polyphase AC/DC power conversion in low voltage integrated circuits. A complete AC power delivery architecture was ...

  12. advanced filter systems: Topics by E-print Network

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

    ac transmission systems (FACTS), flywheel energy storage, high voltage dc transmission (HVDC), hypercapacitor, power electronics, supercapacitor, superconducting magnetic energy...

  13. Alamouti {yjdong, sky6174}@ccl.snu.ac.kr, jsno@snu.ac.kr, djshin@hanyang.ac.kr

    E-Print Network [OSTI]

    No, Jong-Seon

    @snu.ac.kr, djshin@hanyang.ac.kr (soft-decision-and-forward: SDF) . SDF . Alamouti , . (amplify-and-forward: AF) . , SDF AF . 1. . (source: S-decision-and-forward: SDF) . SDF R S phase, phase 1 phase 2 . Phase 1, S R D , phase 2 R D . , S D

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

    Energy Savers [EERE]

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

  15. (5202) e-mail: takasaki.midori@ocha.ac.jp (5201) e-mail: iwasaki.ogihara.chizuru@ocha.ac.jp

    E-Print Network [OSTI]

    Matsuzaki, Katsuhiko

    .chika@ocha.ac.jp = (5215) e-mail: schwartz.laure@ocha.ac.jp (5182) e-mail: kanda.yutsuki@ocha.ac.jp (5181) e

  16. A new high performance AC to DC rectifier with input power factor correction and harmonic reduction capacity

    E-Print Network [OSTI]

    Martinez, Roberto

    1994-01-01T23:59:59.000Z

    Many conventional switching power supplies in data processing equipment and low power motor drive systems operate by rectifying the input ac line voltage and filtering it with large electrolytic capacitors. Because this process involves both...

  17. Radionuclide calorimeter system

    DOE Patents [OSTI]

    Donohoue, T.P.; Oertel, C.P.; Tyree, W.H.; Valdez, J.L.

    1991-11-26T23:59:59.000Z

    A circuit for measuring temperature differentials in a calorimeter is disclosed. The temperature differential between the reference element and sample element containing a radioactive material is measured via a Wheatstone bridge arrangement of thermistors. The bridge is driven with an alternating current on a pulsed basis to maintain the thermal floor of the calorimeter at a low reference value. A lock-in amplifier connected to the bridge phase locks a signal from the bridge to the input pulsed AC signal to provide a DC voltage. The DC voltage is sampled over time and provided to a digital computer. The digital computer, using curve fitting algorithms, will derive a function for the sample data. From the function, an equilibrium value for the temperature may be calculated. 7 figures.

  18. Cost vs. performance ... Gwyn Griffiths email: gxg@noc.soton.ac.uk http://www.noc.soton.ac.uk/OED/gxg/

    E-Print Network [OSTI]

    Griffiths, Gwyn

    Nexa 1.2 kW PEM fuel cell system from Ballard. Cost ~ 5900 Composite hydrogen storage cylinders e://www.noc.soton.ac.uk/OED/gxg/ Cost vs. performance for fuel cells and batteries within AUVs Gwyn Griffiths National Oceanography typical cost Uses similar method to cost energy from a marinised PEM fuel cell Poses some questions

  19. Installation considerations for IGBT AC drives

    SciTech Connect (OSTI)

    Skibinski, G.L.

    1997-06-01T23:59:59.000Z

    In the last four years, Adjustable Speed ac Drive (ASD) manufacturers have migrated from Bipolar Junction Transistor (BJT) semiconductors to Insulated Gate Bipolar Transistors (IGBTs) as the preferred Output switching device. The advantage of IGBTs over BJTs is that device rise and fall time switching capability is 5 - 10 times faster, resulting in lower device switching loss and a more efficient drive. However, for a similar motor cable length as the BJT drive, the faster output voltage risetime of the IGBT drive may increase the dielectric voltage stress on the motor and cable due to a phenomenon called reflected wave. Faster output dv/dt transitions of IGBT drives also increase the possibility for phenomenon such as increased Common Mode (CM) electrical noise, Electromagnetic Interference (EMI) problems and increased capacitive cable charging current problems. Also, recent experience suggests any Pulse Width Modulated (PWM) drive with a steep fronted output voltage wave form may increase motor shaft voltage and lead to a bearing current phenomenon known as fluting. This paper provides a basic understanding of these issues, as well as solutions, to insure a successful drive system installation.

  20. Enhanced distributed energy resource system

    DOE Patents [OSTI]

    Atcitty, Stanley (Albuquerque, NM); Clark, Nancy H. (Corrales, NM); Boyes, John D. (Albuquerque, NM); Ranade, Satishkumar J. (Las Cruces, NM)

    2007-07-03T23:59:59.000Z

    A power transmission system including a direct current power source electrically connected to a conversion device for converting direct current into alternating current, a conversion device connected to a power distribution system through a junction, an energy storage device capable of producing direct current connected to a converter, where the converter, such as an insulated gate bipolar transistor, converts direct current from an energy storage device into alternating current and supplies the current to the junction and subsequently to the power distribution system. A microprocessor controller, connected to a sampling and feedback module and the converter, determines when the current load is higher than a set threshold value, requiring triggering of the converter to supply supplemental current to the power transmission system.

  1. EP-MAC e-mail : jyoak@snu.ac.kr, sbahk@snu.ac.kr

    E-Print Network [OSTI]

    Bahk, Saewoong

    EP-MAC *, e-mail : jyoak@snu.ac.kr, sbahk@snu.ac.kr Early Preamble MAC to reduce-cycled wireless sensor motes. In this paper we propose Early Preamble-MAC(EP-MAC) which enables to get enhanced performance of low energy and low latency. EP-MAC uses both early preamble and original simple preamble, so

  2. Three phase AC motor controller

    DOE Patents [OSTI]

    Vuckovich, Michael (Elizabeth, PA); Wright, Maynard K. (Bethel Park, PA); Burkett, John P. (South Huntington Township, Westmoreland County, PA)

    1984-03-20T23:59:59.000Z

    A motor controller for a three phase AC motor (10) which is adapted to operate bidirectionally from signals received either from a computer (30) or a manual control (32). The controller is comprised of digital logic circuit means which implement a forward and reverse command signal channel (27, 29) for the application of power through the forward and reverse power switching relays (16, 18, 20, 22). The digital logic elements are cross coupled to prevent activation of both channels simultaneously and each includes a plugging circuit (65, 67) for stopping the motor upon the removal of control signal applied to one of the two channels (27, 29) for a direction of rotation desired. Each plugging circuit (65, 67) includes a one-shot pulse signal generator (88, 102) which outputs a single pulse signal of predetermined pulsewidth which is adapted to inhibit further operation of the application of power in the channel which is being activated and to apply a reversal command signal to the other channel which provides a reversed phase application of power to the motor for a period defined by the pulse-width output of the one-shot signal generator to plug the motor (10) which will then be inoperative until another rotational command signal is applied to either of the two channels.

  3. Offshore Wind Park Connection to an HVDC Platform, without using an AC Collector Platform.

    E-Print Network [OSTI]

    Ahmad, Haseeb

    2012-01-01T23:59:59.000Z

    ?? This thesis investigates the comparison between two different alternating current topologies of an offshore wind farms connection to an offshore high voltage direct currentÖ (more)

  4. HVDC control developments - addressing system requirements

    SciTech Connect (OSTI)

    Hauth, R.L.; Patel, H.S.; Piwko, R.J.

    1984-01-01T23:59:59.000Z

    This article describes typical high voltage direct current (HVDC) control systems and some of the new developments in the control area. HVDC control systems are showing their flexible characteristics as demonstrated, for example, by the new modulation, torsional damping, and alternating current voltage and reactive power controllers. Extensive studies are conducted to design and integrate such controllers into HVDC systems and to assure against any detrimental interactions within the total control system. 8 figures.

  5. Performance and economic comparison between point-to-point HVDC transmission and hybrid back-to-back HVDC/AC transmissions

    SciTech Connect (OSTI)

    Hammad, A.E. (ABB, Asea Brown Boveri Ltd., Baden (CH)); Long, W.F. (Wisconsin Univ., Madison, WI (USA))

    1990-04-01T23:59:59.000Z

    Two alternative schemes to interconnect asynchronous or independent ac systems by a limited capacity link are presented. The first alternative is a conventional point-to-point HVDC transmission system; the second alternative comprises an ac line terminated by an HVDC back- to-back link. Technical and operational properties of both schemes are illustrated with emphasis on var regulation capability and control flexibility to improve the overall performance of the interconnected ac systems. Cost comparisons for the principal components of the two alternatives are made. A brief description of two existing HVDC installations is given to demonstrate the practical implementation of the considered schemes.

  6. Power Control and Optimization of Photovoltaic and Wind Energy Conversion Systems /

    E-Print Network [OSTI]

    Ghaffari, Azad

    2013-01-01T23:59:59.000Z

    77 5.2 Wind Energy Conversion System . . . . .Optimization and Control in Wind Energy Conversion SystemsAC matrix con- verter for wind energy conversion system,Ē in

  7. Optimal Selection of AC Cables for Large Scale Offshore Wind Farms

    E-Print Network [OSTI]

    Hu, Weihao

    Optimal Selection of AC Cables for Large Scale Offshore Wind Farms Peng Hou, Weihao Hu, Zhe Chen@et.aau.dk, whu@iet.aau.dk, zch@iet.aau.dk Abstract--The investment of large scale offshore wind farms is high the operational requirements of the offshore wind farms and the connected power systems. In this paper, a new cost

  8. Chaos, Fractals and Bifurcations Lecturer: Chris King king@math.auckland.ac.nz, Ph 88818

    E-Print Network [OSTI]

    King, Chris

    -locking and the devil's staircase. Structural stability, bifurcation theory, Morse-smale systems homoclinic pointsMATHS 745 Chaos, Fractals and Bifurcations Lecturer: Chris King king@math.auckland.ac.nz, Ph 88818 Chaos, fractals and bifurcation, and their application to wide areas including commerce, medicine

  9. www.exeter.ac.uk/inspiring-science Impact of Climate Change on Urban Flooding

    E-Print Network [OSTI]

    Mumby, Peter J.

    www.exeter.ac.uk/inspiring-science Impact of Climate Change on Urban Flooding: a fairy taleMatiCs and PhysiCal sCienCes 2011ceMPS45 Dr Ole Mark is a specialist in climate change and urban water systems-years' experience in both developed and developing countries. Dr Mark is a key partner in the CORFU

  10. Users manual for the Acromag calibration system

    SciTech Connect (OSTI)

    Fordham, C.R.

    1994-11-01T23:59:59.000Z

    This document describes how to use the Acromag calibration system software. It includes the requirements and procedures for operating the ACS.

  11. Cinema 16 Collection / A.C. Killip (collector)

    E-Print Network [OSTI]

    Handy, Todd C.

    Cinema 16 Collection / A.C. Killip (collector) University of British Columbia Archives #12;Table;Collection Description Cinema 16 Collection / A.C. Killip (collector). ≠ 1961-1970. 1.5 cm of textual records

  12. www.mmu.ac.uk/careers Careers & Employability Service

    E-Print Network [OSTI]

    .mmu.ac.uk/careers Identifying courses · www.prospects.ac.uk/search_courses.htm · www.jobs.ac.uk · www.Findamasters.com · www.mmu.ac.uk/careers PG Professional/Vocational courses: Courses to allow you to enter certain professions Courses involve lectures for the first two terms then a research project for the final term (often finishing after

  13. www.strath.ac.uk THIS IS YOUR

    E-Print Network [OSTI]

    Mottram, Nigel

    Building Lorna Bennet SBS Exchange Co-ordinator Michele French SBS Exchange Secretary 01 | Contents 03 Building erkan.oterkus@strath.ac.uk Lorna Bennet Strathclyde Business School Level 2, Sir William Duncan Building lorna.bennet@strath.ac.uk www.strath.ac.uk | 06 #12;Key Dates www

  14. www.pet.hw.ac.uk 1 Private and Confidential

    E-Print Network [OSTI]

    Painter, Kevin

    www.pet.hw.ac.uk 1 Private and Confidential Application for MSc Courses - Supplementary Information of Exam Grade Attained Subjects taken at `O' level or equivalent with grades #12;www.pet.hw.ac.uk 2 of principal & subsidiary subjects Please leave blank for Institute Use #12;www.pet.hw.ac.uk 3 Employment Dates

  15. EXPERIMENTAL STUDY OF ELECTROLYTE DEPENDENCE OF AC ELECTROOSMOTIC PUMPS

    E-Print Network [OSTI]

    Bazant, Martin Z.

    EXPERIMENTAL STUDY OF ELECTROLYTE DEPENDENCE OF AC ELECTROOSMOTIC PUMPS Kapil Subramanian1 , John Abstract: Recent studies indicate increased efficiency of microfluidic ac electro-osmotic pumps of ac electroosmosis in microchannels on solution chemistry for the new fast aceo stepped pumps

  16. AN "AC INDUCTOR" BASED GRID CONNECTED INVERTER

    E-Print Network [OSTI]

    AN "AC INDUCTOR" BASED GRID CONNECTED INVERTER Ilya Zeltser, Student Member, IEEE and Sam Ben proposes a soft switched Output Current Sourcing (OCS) grid connected inverter that applies a high sourcing inverters where the small disturbance at the line voltage may lead to current run away

  17. ACS Installation During SM3B Introduction

    E-Print Network [OSTI]

    Sirianni, Marco

    ACS Installation During SM3B Introduction: · Installed during SM3B in March 2002 · Powerful 3rd · Over-voltage Protection kit installed · Optical Control Electronics connected · New Outer Blanket Layer, and coronagraph ­ Solar Blind Channel (SBC) : HST's most sensitive ultraviolet photon-counting detector 115-180 nm

  18. Appendix AC Exceptions to Delegated Purchasing Authority

    E-Print Network [OSTI]

    Dyer, Bill

    Appendix AC Exceptions to Delegated Purchasing Authority Delegated purchasing authority for professions exempted by 18-4-132, MCA The following services are exempt from Purchasing Procedures per Montana provider - Expert witness hired for use in litigation, Hearings Officer hired in rulemaking and contested

  19. Physics and contentswww.manchester.ac.uk

    E-Print Network [OSTI]

    engineering, science and bioscience research councils. As a postgraduate student at The UniversityPhysics and Astronomy #12;contentswww.manchester.ac.uk 12 The University of Manchester 2 Physics to be part of The University of Manchester. If you choose to be a postgraduate student here you can join us

  20. A complete electrical hazard classification system and its application

    SciTech Connect (OSTI)

    Gordon, Lloyd B [Los Alamos National Laboratory; Cartelli, Laura [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    The Standard for Electrical Safety in the Workplace, NFPA 70E, and relevant OSHA electrical safety standards evolved to address the hazards of 60-Hz power that are faced primarily by electricians, linemen, and others performing facility and utility work. This leaves a substantial gap in the management of electrical hazards in Research and Development (R&D) and specialized high voltage and high power equipment. Examples include lasers, accelerators, capacitor banks, electroplating systems, induction and dielectric heating systems, etc. Although all such systems are fed by 50/60 Hz alternating current (ac) power, we find substantial use of direct current (dc) electrical energy, and the use of capacitors, inductors, batteries, and radiofrequency (RF) power. The electrical hazards of these forms of electricity and their systems are different than for 50160 Hz power. Over the past 10 years there has been an effort to develop a method of classifying all of the electrical hazards found in all types of R&D and utilization equipment. Examples of the variation of these hazards from NFPA 70E include (a) high voltage can be harmless, if the available current is sufficiently low, (b) low voltage can be harmful if the available current/power is high, (c) high voltage capacitor hazards are unique and include severe reflex action, affects on the heart, and tissue damage, and (d) arc flash hazard analysis for dc and capacitor systems are not provided in existing standards. This work has led to a comprehensive electrical hazard classification system that is based on various research conducted over the past 100 years, on analysis of such systems in R&D, and on decades of experience. Initially, national electrical safety codes required the qualified worker only to know the source voltage to determine the shock hazard. Later, as arc flash hazards were understood, the fault current and clearing time were needed. These items are still insufficient to fully characterize all types of electrical hazards. The new comprehensive electrical hazard classification system uses a combination of voltage, shock current available, fault current available, power, energy, and waveform to classify all forms of electrical hazards. Based on this electrical hazard classification system, many new tools have been developed, including (a) work controls for these hazards, (b) better selection of PPE for R&D work, (c) improved training, and (d) a new Severity Ranking Tool that is used to rank electrical accidents and incidents with various forms of electrical energy.

  1. PREPARED FOR THE U.S. DEPARTMENT OF ENERGY, UNDER CONTRACT DE-AC02-76CH03073

    E-Print Network [OSTI]

    ://www.ntis.gov/ordering.htm #12;A Lower Hybrid Current Drive System for Alcator C-Mod. S. Bernabei, J.C. Hosea, D. Loesser, J, P. Woskov, PSFC, MIT. Abstract. A Lower Hybrid Current Drive system is being constructed jointlyPREPARED FOR THE U.S. DEPARTMENT OF ENERGY, UNDER CONTRACT DE-AC02-76CH03073 PRINCETON PLASMA

  2. Robust Timing Synchronization for AC-OFDM Based Optical Wireless Communications

    E-Print Network [OSTI]

    Ranjha, Bilal A; Kavehrad, Mohsen; Deng, Peng

    2015-01-01T23:59:59.000Z

    Visible light communications (VLC) have recently attracted a growing interest and can be a potential solution to realize indoor wireless communication with high bandwidth capacity for RF-restricted environments such as airplanes and hospitals. Optical based orthogonal frequency division multiplexing (OFDM) systems have been proposed in the literature to combat multipath distortion and intersymbol interference (ISI) caused by multipath signal propagation. In this paper, we present a robust timing synchronization scheme suitable for asymmetrically clipped (AC) OFDM based optical intensity modulated direct detection (IM/DD) wireless systems. Our proposed method works perfectly for ACO-OFDM, Pulse amplitude modulated discrete multitone (PAM-DMT) and discrete Hartley transform (DHT) based optical OFDM systems. In contrast to existing OFDM timing synchronization methods which are either not suitable for AC OFDM techniques due to unipolar nature of output signal or perform poorly, our proposed method is suitable for...

  3. THE ACS NEARBY GALAXY SURVEY TREASURY

    SciTech Connect (OSTI)

    Dalcanton, Julianne J.; Williams, Benjamin F.; Rosema, Keith; Gogarten, Stephanie M.; Christensen, Charlotte; Gilbert, Karoline; Hodge, Paul [Department of Astronomy, Box 351580, University of Washington, Seattle, WA 98195 (United States); Seth, Anil C. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Dolphin, Andrew [Raytheon, 1151 E. Hermans Road, Tucson, AZ 85756 (United States); Holtzman, Jon [Department of Astronomy, New Mexico State University, Box 30001, 1320 Frenger St., Las Cruces, NM 88003 (United States); Skillman, Evan D.; Weisz, Daniel [Department of Astronomy, University of Minnesota, 116 Church St. SE, Minneapolis, MN 55455 (United States); Cole, Andrew [School of Mathematics and Physics, University of Tasmania, Hobart, Tasmania (Australia); Girardi, Leo [Osservatorio Astronomico di Padova - INAF, Vicolo dell'Osservatorio 5, I-35122 Padova (Italy); Karachentsev, Igor D. [Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnji Arkhyz, Karachai-Circessia Republic 369167 (Russian Federation); Olsen, Knut [NOAO, National Optical Astronomy Observatory 950 N. Cherry Ave., Tucson, AZ 85719 (United States); Freeman, Ken [Mount Stromlo Observatory, Research School of Astronomy and Astrophysics, The Australian National Univ., ACT 0200 (Australia); Gallart, Carme [Inst. de AstrofIsica de Canarias, VIa Lactea, s/n, 38200 La Laguna, Tenerife (Spain); Harris, Jason [Steward Observatory, Univ. of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); De Jong, Roelof S. [Space Telescope Science Inst., 3700 San Martin Dr., Baltimore, MD 21218 (United States)], E-mail: jd@astro.washington.edu, E-mail: ben@astro.washington.edu, E-mail: krosema@astro.washington.edu, E-mail: stephanie@astro.washington.edu, E-mail: christensen@astro.washington.edu, E-mail: fabio@astro.washington.edu, E-mail: trq@astro.washington.edu, E-mail: aseth@cfa.harvard.edu (and others)

    2009-07-15T23:59:59.000Z

    The ACS Nearby Galaxy Survey Treasury (ANGST) is a systematic survey to establish a legacy of uniform multi-color photometry of resolved stars for a volume-limited sample of nearby galaxies (D < 4 Mpc). The survey volume encompasses 69 galaxies in diverse environments, including close pairs, small and large groups, filaments, and truly isolated regions. The galaxies include a nearly complete range of morphological types spanning a factor of {approx}10{sup 4} in luminosity and star formation rate. The survey data consist of images taken with the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST), supplemented with archival data and new Wide Field Planetary Camera 2 (WFPC2) imaging taken after the failure of ACS. Survey images include wide field tilings covering the full radial extent of each galaxy, and single deep pointings in uncrowded regions of the most massive galaxies in the volume. The new wide field imaging in ANGST reaches median 50% completenesses of m {sub F475W} = 28.0 mag, m {sub F606W} = 27.3 mag, and m {sub F814W} = 27.3 mag, several magnitudes below the tip of the red giant branch (TRGB). The deep fields reach magnitudes sufficient to fully resolve the structure in the red clump. The resulting photometric catalogs are publicly accessible and contain over 34 million photometric measurements of >14 million stars. In this paper we present the details of the sample selection, imaging, data reduction, and the resulting photometric catalogs, along with an analysis of the photometric uncertainties (systematic and random), for both ACS and WFPC2 imaging. We also present uniformly derived relative distances measured from the apparent magnitude of the TRGB.

  4. HST/ACS Direct Ages of the Dwarf Elliptical Galaxies NGC 147 and NGC 185

    E-Print Network [OSTI]

    Geha, M; Grocholski, A; Dolphin, A; van der Marel, R P; Guhathakurta, P

    2015-01-01T23:59:59.000Z

    We present the deepest optical photometry for any dwarf elliptical (dE) galaxy based on Hubble Space Telescope ACS observations of the Local Group dE galaxies NGC 147 and NGC 185. The resulting F606W and F814W color-magnitude diagrams are the first to reach below the main sequence turnoff in a dE galaxy, allowing us to determine full star formation histories in these systems. The ACS fields are located ~1.5 effective radii from the galaxy center to avoid photometric crowding. While our ACS pointings in both dEs show unambiguous evidence for old and intermediate age stars, the mean age in NGC 147 is ~ 4 Gyr younger as compared to NGC 185. In NGC 147, only 40% of stars were in place 12.5 Gyrs ago (z~5), with the bulk of the remaining stellar population forming between 5 to 7 Gyr. In contrast, 70% of stars were formed in NGC 185 field more than12.5 Gyr ago with the majority of the remaining population forming between 8 to 10 Gyr. Star formation ceased in both ACS fields at least 3 Gyr ago. Previous observations ...

  5. Direct amplitude detuning measurement with ac dipole

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

    White, S.; Maclean, E.; TomŠs, R.

    2013-07-01T23:59:59.000Z

    In circular machines, nonlinear dynamics can impact parameters such as beam lifetime and could result in limitations on the performance reach of the accelerator. Assessing and understanding these effects in experiments is essential to confirm the accuracy of the magnetic model and improve the machine performance. A direct measurement of the machine nonlinearities can be obtained by characterizing the dependency of the tune as a function of the amplitude of oscillations (usually defined as amplitude detuning). The conventional technique is to excite the beam to large amplitudes with a single kick and derive the tune from turn-by-turn data acquired with beam position monitors. Although this provides a very precise tune measurement it has the significant disadvantage of being destructive. An alternative, nondestructive way of exciting large amplitude oscillations is to use an ac dipole. The perturbation Hamiltonian in the presence of an ac dipole excitation shows a distinct behavior compared to the free oscillations which should be correctly taken into account in the interpretation of experimental data. The use of an ac dipole for direct amplitude detuning measurement requires careful data processing allowing one to observe the natural tune of the machine; the feasibility of such a measurement is demonstrated using experimental data from the Large Hadron Collider. An experimental proof of the theoretical derivations based on measurements performed at injection energy is provided as well as an application of this technique at top energy using a large number of excitations on the same beam.

  6. Absorption of ac fields in amorphous indium-oxide films

    SciTech Connect (OSTI)

    Ovadyahu, Z. [Racah Institute of Physics, the Hebrew University, Jerusalem 91904 (Israel)

    2014-08-20T23:59:59.000Z

    Absorption data from applied ac fields in Anderson-localized amorphous indium-oxide (In{sub x}O) films are shown to be frequency and disorder dependent. The absorption shows a roll-off at a frequency which is much lower than the electron-electron scattering rate of the material when it is in the diffusive regime. This is interpreted as evidence for discreteness of the energy spectrum of the deeply localized regime. This is consistent with recent many-body localization scenarios. As the metal-insulator transition is approached, the absorption shifts to higher frequencies. Comparing with the previously obtained results on the crystalline version of indium-oxide (In{sub 2}O{sub 3?x}) implies a considerably higher inelastic electron-phonon scattering rate in the amorphous material. The range over which the absorption versus frequency decreases may indicate that a wide distribution of localization length is a common feature in these systems.

  7. ac losses: Topics by E-print Network

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

    23 24 25 Next Page Last Page Topic Index 1 Transport AC loss in high temperature superconducting coils University of Cambridge - Dspace Summary: 's electromagnetic properties and...

  8. www.sheffield.ac.uk/careers Develop Your

    E-Print Network [OSTI]

    Martin, Stephen John

    Marketplace' run by the Careers Service and HSBC Bank www.shef. ac.uk/careers/students/advice/sfs. 10. If you

  9. E-Print Network 3.0 - ac voltage standard Sample Search Results

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

    "volts, AC"), the "secondary" voltage is roughly 6 VAC. We shall use the "Universal Transformer... :" conversion of AC to DC You can use a diode to convert the AC voltage of the...

  10. E-Print Network 3.0 - ac conduction properties Sample Search...

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

    measure the dynamical conductance of electrically contacted single-walled carbon nanotubes at dc and ac... between the ac ... Source: Burke, Peter - Department of Electrical...

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

    E-Print Network [OSTI]

    Tolbert, Leon M.

    Inductorless DC-AC Cascaded H-bridge Multilevel Boost Inverter for Electric/Hybrid Electric Vehicle boost inverter for EV and HEV applications. Currently available power inverter systems for HEVs use a DC- DC boost converter to boost the battery voltage for a traditional 3-phase inverter. The present HEV

  12. Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01830

    E-Print Network [OSTI]

    in the Bonneville Power Administration's footprint as an energy arbitrage instrument. This analysis was performed with collaboration by the Bonneville Power Administration and funded by the Energy Storage Systems Program of the UPNNL-19300 Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01830 Energy

  13. PREPARED FOR THE U.S. DEPARTMENT OF ENERGY, UNDER CONTRACT DE-AC02-76CH03073

    E-Print Network [OSTI]

    /FW for on-axis current drive and a Lower Hybrid system for off-axis. Transport projections are presentedPREPARED FOR THE U.S. DEPARTMENT OF ENERGY, UNDER CONTRACT DE-AC02-76CH03073 PRINCETON PLASMA agency thereof. Availability This report is posted on the U.S. Department of Energy's Princeton Plasma

  14. www.swansea.ac.uk Health & Safety Office

    E-Print Network [OSTI]

    Martin, Ralph R.

    : falling, type of work, frequency, ladders Machinery: moving parts, safety guards, entrapment, serv / maintwww.swansea.ac.uk Health & Safety Office Safety Tours and Inspections Ron Knuszka Safety Officer #12;www.swansea.ac.uk Health & Safety Office Objectives To be able to apply University Procedure

  15. www.mmu.ac.uk/careers Careers & Employability Service

    E-Print Network [OSTI]

    ;www.mmu.ac.uk/careers Identifying courses · www.prospects.ac.uk/search_courses.htm · www: Courses to allow you to enter certain professions Courses that build your skills in a new area Examples · MRes (taught prep for further research) These usually involve lectures for the first two terms

  16. www.eprg.group.cam.ac.uk EPRGWORKINGPAPER

    E-Print Network [OSTI]

    Aickelin, Uwe

    www.eprg.group.cam.ac.uk EPRGWORKINGPAPER Abstract Contracting for wind generation EPRG Working an on- shore wind generator would be issued one ROC per MWh that they could sell in the market for ROCs@cam.ac.uk Publication July 2011 Financial Support ESRC RES-189-25-0155 #12;EPRG No 1120 1 Contracting for wind

  17. IT Services go.warwick.ac.uk/whatsnew2010

    E-Print Network [OSTI]

    Davies, Christopher

    to enable us to develop it as you would like. https://start.warwick.ac.uk/ Warwick Forward Warwick Forward. The domain itself must be registered with an external company by you. http://forward.warwick.ac.uk/ Files to navigate. · Files Transfer Utility. Enable access via a drive letter in Windows Explorer (or equivalent

  18. A Distributed Generation Control Architecture for Islanded AC Microgrids

    E-Print Network [OSTI]

    Dominguez-Garcia, Alejandro

    1 A Distributed Generation Control Architecture for Islanded AC Microgrids Stanton T. Cady, Student Member, IEEE Abstract In this paper, we propose a distributed architecture for generation control in islanded ac microgrids with both synchronous generators and inverter-interfaced power supplies. Although

  19. Applied Cognitive Science (ACS) The ACS lab is directed by Dr. Frank Ritter, professor of IST and

    E-Print Network [OSTI]

    Squicciarini, Anna Cinzia

    Applied Cognitive Science (ACS) Laboratory The ACS lab is directed by Dr. Frank Ritter, professor during the 2012-2013 academic year, studies cognitive modeling, cognitive architectures, human-computer interaction (HCI), and learning. He has taught cognitive modeling, cognitive architectures, HCI, human factors

  20. Application of direct pulsewidth modulation scheme to AC-DC converters: - a way to reduce ripple

    E-Print Network [OSTI]

    Zhang, Yuemin

    1993-01-01T23:59:59.000Z

    Modulation (ISPWM), 4 Direct Pulsewidth Modulation (DPWM). 15 5 Single Phase Half Controlled PWM ac-dc Converter . 6 Single Phase Full controlled PWM ac-dc Converter . 18 18 7 Simulation of SPWM ac-dc Converter. 20 8 Output Voltage Spectra of SPWM ac... 30 Balanced Three Phase Inputs 31 Output Voltage of A Three Phase Full Controlled ac-dc SPWM Converter. 42 32 Output Voltage of A Three Phase Full Controlled ac-dc EPWM Con- verter 33 Output Voltage of A Three Phase Full Controlled ac-dc ISPWM Con...

  1. Optimal design of AC filter circuits in HVDC converter stations

    SciTech Connect (OSTI)

    Saied, M.M.; Khader, S.A. [Kuwait Univ. (Kuwait). Electrical and Computer Engineering Dept.

    1995-12-31T23:59:59.000Z

    This paper investigates the reactive power as well as the harmonic conditions on both the valve and the AC-network sides of a HVDC converter station. The effect of the AC filter circuits is accurately modeled. The program is then augmented by adding an optimization routine. It can identify the optimal filter configuration, yielding the minimum current distortion factor at the AC network terminals for a prespecified fundamental reactive power to be provided by the filter. Several parameter studies were also conducted to illustrate the effect of accidental or intentional deletion of one of the filter branches.

  2. C.Sc. 131: Systems ArchitectureC.Sc. 131: Systems ArchitectureC.Sc. 131: Systems Architecture ---200620062006 Systems Architecture

    E-Print Network [OSTI]

    Cheverst, Keith

    1 C.Sc. 131: Systems ArchitectureC.Sc. 131: Systems ArchitectureC.Sc. 131: Systems Architecture --- 200620062006 C.Sc. 131: Systems Architecture Dr Keith Cheverst kc@comp.lancs.ac.uk C42, infolab C.Sc. 131: Systems ArchitectureC.Sc. 131: Systems ArchitectureC.Sc. 131: Systems Architecture --- 200620062006 CSc101

  3. E-Print Network 3.0 - aerospace system test reactor Sample Search...

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

    Engineering 15 www.eprg.group.cam.ac.uk EPRGWORKINGPAPER Summary: Accelerator-Driven Subcritical Reactor Park Michel-Alexandre Cardin1 Engineering Systems Division... and reactor...

  4. Contract Number: DE-AC05-76RL01830 Modification M705

    E-Print Network [OSTI]

    #12;#12;Contract Number: DE-AC05-76RL01830 Modification M705 #12;Contract Number: DE-AC05-76RL01830 Modification M705 #12;Contract Number: DE-AC05-76RL01830 Modification M705 #12;Contract Number: DE-AC05-76RL01830 Modification M705 #12;Contract Number: DE-AC05-76RL01830 Modification M705 #12;Contract Number: DE

  5. Graphene-coated coupling coil for AC resistance reduction

    DOE Patents [OSTI]

    Miller, John M

    2014-03-04T23:59:59.000Z

    At least one graphene layer is formed to laterally surround a tube so that the basal plane of each graphene layer is tangential to the local surface of the tube on which the graphene layer is formed. An electrically conductive path is provided around the tube for providing high conductivity electrical path provided by the basal plane of each graphene layer. The high conductivity path can be employed for high frequency applications such as coupling coils for wireless power transmission to overcome skin depth effects and proximity effects prevalent in high frequency alternating current paths.

  6. E-Print Network 3.0 - alternating current transmission Sample...

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

    Collection: Power Transmission, Distribution and Plants 4 The Cost of Transmission for Wind Energy: A Review of Summary: W, or roughly 25% of the current 2,000kW cost of...

  7. E-Print Network 3.0 - alternating current plasma Sample Search...

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

    of Direct and Indirect Effects of Non-Thermal Atmospheric-Pressure Summary: and agarplasma interfaces was set to 1.5 mm. Alternating polarity sinusoidal voltage of 35 kV...

  8. The solution of antenna array input impedances using an alternating current network calculator

    E-Print Network [OSTI]

    Pool, Jack William

    1963-01-01T23:59:59.000Z

    Q ? 0 N UJ 0?N J UJ Uj I- 8 z a g W O N 0 IA I a Z VI J X IU I ) 0 Hg I 0 N ?W R W IH lj 0 2 CI R X W 4. IU UJ N RI-a Z ICI W V 0 Z Q. ?C 00? W IU R k la. UJ N 4. W CA J Vj IU a Vl IA I IU 0 Jl-I 0 5 4J 5 Z R 0 R UJ... Vj UI Z Vj hl IA K I- X CL' I Z4JKC?D I-W CZU. O 0?Z ~ I- 2 RZ I-U. IU NUJ UJ IUZOU. I-W VIVIZICZW 0 ZIU41 A. RI-KUJ Rw JRIU 0 DQR jh N 8 Q I- 2 & ?0 3 UJ Z X? 0 uj R I- IA JU WZ ?CN?C K JON I-UJUJ ZD RU. ?CZ JIUOZ Rl-?C IU Z Z?C Z 0 ?Rl...

  9. E-Print Network 3.0 - alternating current electrical Sample Search...

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

    Collection: Plasma Physics and Fusion 3 EECS 498 Special Topic Grid Integration of Alternative Energy Summary: EECS 498 Special Topic Grid Integration of Alternative Energy...

  10. Direct-current-like Phase Space Manipulation Using Chirped Alternating Current Fields

    SciTech Connect (OSTI)

    P.F. Schmit and N.J. Fisch

    2010-02-01T23:59:59.000Z

    Waves in plasmas can accelerate particles that are resonant with the wave. A dc electric field also accelerates particles, but without a resonance discrimination, which makes the acceleration mechanism profoundly different. Whereas wave-particle acceleration mechanisms have been widely discussed in the literature, this work discusses the direct analogy between wave acceleration and dc field acceleration in a particular parameter regime explored in previous works. Apart from the academic interest of this correspondence, there may be practical advantages in using waves to mimic dc electric fields, for example, in driving plasma current with high efficiency.

  11. ac linear positioning: Topics by E-print Network

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

    USA kimik@yonsei.ac.kr Abstract- In this paper, one linear tapered slot antenna (LTSA), backed Tentzeris, Manos 187 The Square Root Law Requires a Linear Key Andrew D. Ker...

  12. INTERPRETATION OF AC IMPEDANCE MEASUREMENTS IN SOLIDS* J. Ross Macdonald

    E-Print Network [OSTI]

    Macdonald, James Ross

    = INTERPRETATION OF AC IMPEDANCE MEASUREMENTS IN SOLIDS* J. Ross Macdonald Department of Physics Foundation (Grant No. DMR 75-10739). 81 #12;82 PERTINENT PARAMETERS J.R. MACDONALD Figure 1 shows

  13. 10.1071/SR10009_AC1 CSIRO 20102

    E-Print Network [OSTI]

    Lehmann, Johannes

    10.1071/SR10009_AC1 ©CSIRO 20102 Accessory Publication: Australian Journal of Soil Research, 2010 recovered from the supernatant by22 centrifugation at 2000 x G. Samples where then washed 3 times

  14. Cognitive Radio Network {swjang, sbahk}@netlab.snu.ac.kr

    E-Print Network [OSTI]

    Bahk, Saewoong

    2010 Cognitive Radio Network , , {swjang, sbahk}@netlab.snu.ac.kr Analysis of Average Opportunities in Cognitive Radio Networks Seowoo Jang, Saewoong Bahk INMC, EECS, Seoul National University Cognitive Radio Network . Primary user

  15. www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY

    E-Print Network [OSTI]

    Aickelin, Uwe

    www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY Contracting for wind generation EPRG to the current Renewable Obligation Certificates, ROCs, where an on-shore wind generator receives one ROC

  16. acs presspac: Topics by E-print Network

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

    limits. The models are used to estimate the benefits of electricity locational marginal pricing (LMP) that arise from de Gispert, Adri 344 www.eprg.group.cam.ac.uk...

  17. ac microsized gliding: Topics by E-print Network

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

    limits. The models are used to estimate the benefits of electricity locational marginal pricing (LMP) that arise from de Gispert, Adri 417 www.eprg.group.cam.ac.uk...

  18. acs evidence based: Topics by E-print Network

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

    limits. The models are used to estimate the benefits of electricity locational marginal pricing (LMP) that arise from de Gispert, Adri 260 34CEN.ACS.ORG DECEMBER 23, 2013...

  19. ac surface photovoltage: Topics by E-print Network

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

    limits. The models are used to estimate the benefits of electricity locational marginal pricing (LMP) that arise from de Gispert, Adri 483 www.eprg.group.cam.ac.uk...

  20. acute cholecystitis ac: Topics by E-print Network

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

    limits. The models are used to estimate the benefits of electricity locational marginal pricing (LMP) that arise from de Gispert, Adri 384 www.eprg.group.cam.ac.uk...

  1. Microfluidics {sjauh, btzhang}@bi.snu.ac.kr

    E-Print Network [OSTI]

    Microfluidics {sjauh, btzhang}@bi.snu.ac.kr Solving Shortest Path Problems Using Microfluidics Sahng-Joon Auh and Byoung-Tak Zhang Biointelligence Lab, School of Computer Science and Engineering Seoul National University . microfluidics MEMS

  2. www.arts.canterbury.ac.nz/internships Project Title

    E-Print Network [OSTI]

    Hickman, Mark

    , researching suppliers and material requirements. The intern will also do research about.arts.canterbury.ac.nz/internships Necessary Qualifications: Major/Minors(s): All majors in the B.A. especially those interested in media

  3. www.glasgow.ac.uk/parents Say hello to Glasgow

    E-Print Network [OSTI]

    Guo, Zaoyang

    Parents' Guide www.glasgow.ac.uk/parents #12;2 Welcome Say hello to Glasgow Choosing the right Satisfaction (National Student Survey). Contents Page 2 Welcome Say hello to Glasgow Pages3

  4. University Policy No.: AC1145 Classification: Academic and Students

    E-Print Network [OSTI]

    Victoria, University of

    and maintaining high quality programs of education and research, to ongoing improvement of those programsUniversity Policy No.: AC1145 Classification: Academic and Students Approving Authority: Senate ACADEMIC PROGRAM REVIEW Effective Date: October/04 Supersedes: November/85 Last Editorial

  5. www.eprg.group.cam.ac.uk EPRGWORKINGPAPER

    E-Print Network [OSTI]

    Aickelin, Uwe

    are efficiency, sustainability and security of energy supplies (Euwww.eprg.group.cam.ac.uk EPRGWORKINGPAPER Abstract Conceptualizing Energy Security EPRG Working Paper 1123 Cambridge Working Paper in Economics 1151 Christian Winzer Energy security is one of the main

  6. ac josephson effect: Topics by E-print Network

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

    in the dc mass currents voltage, a high frequency ac voltage is applied across a superconduct- ing Josephson junction, the dc, Dm 22eV, application of a dc voltage produces...

  7. ac magnetic field: Topics by E-print Network

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

    contract No. DE-AC02-76CH00016. Abstract A common coil design concept for 2-in-1 superconduct- ing Gupta, Ramesh 126 Anisotropy of magnetic emulsions induced by magnetic and...

  8. ac magnetic fields: Topics by E-print Network

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

    contract No. DE-AC02-76CH00016. Abstract A common coil design concept for 2-in-1 superconduct- ing Gupta, Ramesh 126 Anisotropy of magnetic emulsions induced by magnetic and...

  9. www.kent.ac.uk/is/ Information Services

    E-Print Network [OSTI]

    Banaji,. Murad

    .kent.ac.uk/cmsds-local/ Installing `Putty' Download it from the web (if you have administrator privilages) www close to each other. A dark cursor will not show on a dark background. Ideally make either

  10. Adjustable Speed AC Motor Drives-Applications Problems

    E-Print Network [OSTI]

    Enjeti, P.

    Adjustable Speed AC Motor Drives Applications Problems by Dr. P. Enjeti Power Quality Laboratory Department ofElectrical Engineering Texas A&M University College Station, TX 77843 Tel: 409-845-7466 Fax: 409-845-6259 Email..., it generates side effects, some which have been recognized only recently. This paper presents a comprehensive coverage of application issues of PWM inverter controlled ac motor drives which include damage to motor insulation due to reflected voltages caused...

  11. Boston University -College of Engineering Course Number: EC/MS 573 Course Title: Solar Energy Systems

    E-Print Network [OSTI]

    conversion: Photovoltaic, Photoelectrochemical, Photothermal, and Thermoelectric systems: Course overview #12 systems, system sizing, device structures, device construction, installation, measurements; DC to AC Systems Syllabus: [ ] Fall [X] Spring 2010 [ ]Summer Course Designation (check one) [ X] Lecture

  12. ac transmission system: Topics by E-print Network

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

    limits. The models are used to estimate the benefits of electricity locational marginal pricing (LMP) that arise from de Gispert, Adri 333 Heat transmission in Relativity...

  13. ac transmission systems: Topics by E-print Network

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

    limits. The models are used to estimate the benefits of electricity locational marginal pricing (LMP) that arise from de Gispert, Adri 333 Heat transmission in Relativity...

  14. AVTA: Aerovironment AC Level 2 Charging System Testing Results | Department

    Energy Savers [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 Delicious RankCombustionImprovement3 Beryllium-Associated6-05.pdfATTENDEEES: Ashley Armstrong, DOEUpDepartment ofof

  15. Challenges in Embedded Systems

    E-Print Network [OSTI]

    Koopman, Philip

    even if AC power available u Harsh environment · Power fluctuations, RF interference, lightning · Heat Can't You Design Embedded Systems Just Like Desktop Systems? #12;10 Case Study: Synthesize A Remote-by-composition tool #12;11 What's A Remote Entry Receiver? u RF receiver for door locks, trunk (boot), latch, etc. · 8

  16. Advance Three Phase Power Factor Correction Schemes for Utility Interface of Power Electronic Systems

    E-Print Network [OSTI]

    Albader, Mesaad

    2014-07-30T23:59:59.000Z

    systems, battery chargers and data centers etc. Also, high voltage DC (HVDC) systems employ rectifiers to convert ac input to DC output. HVDC is one example of the application of AC/DC conversion, in power system also, grid tie of two different power...

  17. ESBWR response to an extended station blackout/loss of all AC power

    SciTech Connect (OSTI)

    Barrett, A. J.; Marquino, W. [New Plants Engineering, GE Hitachi Nuclear Energy, M/CA 75, 3901 Castle Hayne Road, Wilmington, NC 28402 (United States)

    2012-07-01T23:59:59.000Z

    U.S. federal regulations require light water cooled nuclear power plants to cope with Station Blackouts for a predetermined amount of time based on design factors for the plant. U.S. regulations define Station Blackout (SBO) as a loss of the offsite electric power system concurrent with turbine trip and unavailability of the onsite emergency AC power system. According to U.S. regulations, typically the coping period for an SBO is 4 hours and can be as long as 16 hours for currently operating BWR plants. Being able to cope with an SBO and loss of all AC power is required by international regulators as well. The U.S. licensing basis for the ESBWR is a coping period of 72 hours for an SBO based on U.S. NRC requirements for passive safety plants. In the event of an extended SBO (viz., greater than 72 hours), the ESBWR response shows that the design is able to cope with the event for at least 7 days without AC electrical power or operator action. ESBWR is a Generation III+ reactor design with an array of passive safety systems. The ESBWR primary success path for mitigation of an SBO event is the Isolation Condenser System (ICS). The ICS is a passive, closed loop, safety system that initiates automatically on a loss of power. Upon Station Blackout or loss of all AC power, the ICS begins removing decay heat from the Reactor Pressure Vessel (RPV) by (i) condensing the steam into water in heat exchangers located in pools of water above the containment, and (ii) transferring the decay heat to the atmosphere. The condensed water is then returned by gravity to cool the reactor again. The ICS alone is capable of maintaining the ESBWR in a safe shutdown condition after an SBO for an extended period. The fuel remains covered throughout the SBO event. The ICS is able to remove decay heat from the RPV for at least 7 days and maintains the reactor in a safe shutdown condition. The water level in the RPV remains well above the top of active fuel for the duration of the SBO event. Beyond 7 days, only a few simple actions are needed to cope with the SBO for an indefinite amount of time. The operation of the ICS as the primary success path for mitigation of an SBO, allows for near immediate plant restart once power is restored. (authors)

  18. DE-AC05-00OR22725 Section B--Page 1 of 7 DE-AC05-00OR22725

    E-Print Network [OSTI]

    .......................................................................... 5 #12;DE-AC05-00OR22725 Section B--Page 2 of 7 DE-AC05-000R22725 Modification No. 760 Section B Blank Page #12;DE-AC05-00OR22725 Section B--Page 3 of 7 DE-AC05-000R22725 Modification No. 760 Section B of 7 DE-AC05-000R22725 Modification No. 760 Section B 4) $267,518 for the project entitled "4500 Area

  19. Convex Models of Distribution System Reconfiguration

    E-Print Network [OSTI]

    Taylor, Joshua A.

    We derive new mixed-integer quadratic, quadratically constrained, and second-order cone programming models of distribution system reconfiguration, which are to date the first formulations of the ac problem that have convex, ...

  20. Towards parametric environmental profiles of complex industrial systems in

    E-Print Network [OSTI]

    Boyer, Edmond

    -design, Life Cycle Assessment (LCA), Complex industrial system, parametric simulation, AC/DC conversion in environmental assessment. Actually, if a methodology like Life Cycle Assessment (LCA) is clearly defined and quality. This article proposes a Life Cycle Assessment of an Alstom Grid AC/DC conversion substation

  1. DC systems with transformerless converters

    SciTech Connect (OSTI)

    Vithayathil, J.J.; Mittlestadt, W. [Bonneville Power Administration, Portland, OR (United States)] [Bonneville Power Administration, Portland, OR (United States); Bjoerklund, P.E. [ABB Power Systems AB, Ludvika (Sweden)] [ABB Power Systems AB, Ludvika (Sweden)

    1995-07-01T23:59:59.000Z

    A technical and economic feasibility study of HVDC systems without converter transformers is presented. The presentation includes proposed solutions to the drawback related to the absence of galvanic separation between the ac and dc systems, if the converter transformers are eliminated. The results show that HVDC systems without converter transformers are both technically and economically feasible. The cost savings can be substantial.

  2. DOI: 10.1021/la9049204 8021Langmuir 2010, 26(11), 80218029 Published on Web 03/24/2010 pubs.acs.org/Langmuir

    E-Print Network [OSTI]

    Firoozabadi, Abbas

    .acs.org/Langmuir © 2010 American Chemical Society Polymeric Dispersants Delay Sedimentation in Colloidal Asphaltene March 15, 2010 Asphaltenes, among the heaviest components of crude oil, can become unstable under sedimentation measurements for a system of colloidal scale asphaltene particles suspended in heptane. Adding

  3. Research by BNL investigators was performed under the auspices of the U.S. Department of Energy under Contract No. DE-AC02-98CH10886.

    E-Print Network [OSTI]

    of Energy under Contract No. DE-AC02-98CH10886. BNL-61220 The Whitehouse Effect: Shortwave radiative forcing and Visual Air Quality, Snowbird, UT, Sept. 26-30, pp. 403-409, Air and Waste Management Association-atmosphere system both directly, by scattering light and, indirectly, by increasing the reflectivity of clouds

  4. Implementation of Smart Operation Strategies for Air-Conditioning and Lighting Systems for Ministries Complex in the State of Kuwait

    E-Print Network [OSTI]

    Al-Mulla, A.; Maheshwari, G. P.; Al-Nakib, D.; Ishaqali, H.

    The smart operation strategies were implemented for Air-Conditioning (A/C) and lighting systems to reduce the national load at Ministries Complex (MC) in the state of Kuwait. The A/C system in MC is a district cooling system that comprises of 8...

  5. E-Print Network 3.0 - ac power distribution Sample Search Results

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

    Ray Summary: Capacitor Bias - T Figure 4 - AC Distribution Using a Bias-T Advantages of Power Distribution Using Bias... . In the case of AC power distribution with bias-T...

  6. DE-AC02-76SF00515 Apr2007/Rev 1

    E-Print Network [OSTI]

    Wechsler, Risa H.

    DE-AC02-76SF00515 Appendix B Apr2007/Rev 1 FY 2007 Contractor Performance Evaluation and Measurement Plan for Management and Operations ofthe Stanford Linear Accelerator Center J-B-i #12;DE-AC02

  7. Superconducting shielded core reactor with reduced AC losses

    DOE Patents [OSTI]

    Cha, Yung S.; Hull, John R.

    2006-04-04T23:59:59.000Z

    A superconducting shielded core reactor (SSCR) operates as a passive device for limiting excessive AC current in a circuit operating at a high power level under a fault condition such as shorting. The SSCR includes a ferromagnetic core which may be either closed or open (with an air gap) and extends into and through a superconducting tube or superconducting rings arranged in a stacked array. First and second series connected copper coils each disposed about a portion of the iron core are connected to the circuit to be protected and are respectively wound inside and outside of the superconducting tube or rings. A large impedance is inserted into the circuit by the core when the shielding capability of the superconducting arrangement is exceeded by the applied magnetic field generated by the two coils under a fault condition to limit the AC current in the circuit. The proposed SSCR also affords reduced AC loss compared to conventional SSCRs under continuous normal operation.

  8. Sarah.Glynn@ed.ac.uk April 2008 Liberalising Islam: creating Brits of the Islamic Persuasion

    E-Print Network [OSTI]

    .Glynn@ed.ac.uk April 2008 1 Liberalising Islam: creating Brits of the Islamic Persuasion In common with other

  9. PV Grounding Sponsored by the Photovoltaic Systems Assistance Center, Sandia National Laboratories

    E-Print Network [OSTI]

    Johnson, Eric E.

    PV Grounding Continued John Wiles Sponsored by the Photovoltaic Systems Assistance Center, Sandia methods will be covered. The subject is quite complex. Grounding photovoltaic (PV) systems with both AC-grounding conductors in other DC circuits and in AC circuits are sized according to Table 250.122 in the NEC

  10. Study of AC/RF properties of SRF ingot niobium

    SciTech Connect (OSTI)

    Dhakal, Pashupati; Tsindlekht, Menachem I.; Genkin, Valery M.; Ciovati, Gianluigi; Myneni, Ganapati Rao

    2013-09-01T23:59:59.000Z

    In an attempt to correlate the performance of superconducting radiofrequency cavities made of niobium with the superconducting properties, we present the results of the magnetization and ac susceptibility of the niobium used in the superconducting radiofrequency cavity fabrication. The samples were subjected to buffer chemical polishing (BCP) surface and high temperature heat treatments, typically applied to the cavities fabrications. The analysis of the results show the different surface and bulk ac conductivity for the samples subjected to BCP and heat treatment. Furthermore, the RF surface impedance is measured on the sample using a TE011 microwave cavity for a comparison to the low frequency measurements.

  11. Contract No. DE-AC05-76RL01830 Modification M943

    E-Print Network [OSTI]

    Contract No. DE-AC05-76RL01830 Modification M943 SECTION J APPENDIX A ADVANCE UNDERSTANDINGS ON HUMAN RESOURCES COST Applicable to the Operation of PACIFIC NORTHWEST NATIONAL LABORATORY Contract No. DE-AC05-76RL01830 #12;Contract No. DE-AC05-76RL01830 Modification M943 J-A-1 Table of Contents

  12. Contract Number: DE-AC05-76RL01830 Modification M957

    E-Print Network [OSTI]

    Contract Number: DE-AC05-76RL01830 Modification M957 APPENDIX E STANDARDS OF PERFORMANCE-BASED FEE OF THE PACIFIC NORTHWEST NATIONAL LABORATORY #12;Contract Number: DE-AC05-76RL01830 Modification M957 APPENDIX E FOR MANAGEMENT AND OPERATIONS OF THE PACIFIC NORTHWEST NATIONAL LABORATORY #12;Contract Number: DE-AC05-76RL01830

  13. (mercury.yukawa.kyoto-u.ac.jp)ssh Permission denied (publickey).

    E-Print Network [OSTI]

    Shimizu, Akira

    SSH Q&A (mercury.yukawa.kyoto-u.ac.jp)ssh Permission denied (publickey). (1) ID ID ID (2) ssh -i () ssh -i $HOME/.ssh/id_yitp_rsa (UID)@mercury.yukawa.kyoto-u.ac.jp (3) (1)(2) Permission denied support@yukawa.kyoto-u.ac.jp (mercury

  14. Optimal management of batteries in electric systems

    DOE Patents [OSTI]

    Atcitty, Stanley (Albuquerque, NM); Butler, Paul C. (Albuquerque, NM); Corey, Garth P. (Albuquerque, NM); Symons, Philip C. (Morgan Hill, CA)

    2002-01-01T23:59:59.000Z

    An electric system including at least a pair of battery strings and an AC source minimizes the use and maximizes the efficiency of the AC source by using the AC source only to charge all battery strings at the same time. Then one or more battery strings is used to power the load while management, such as application of a finish charge, is provided to one battery string. After another charge cycle, the roles of the battery strings are reversed so that each battery string receives regular management.

  15. Introduction to Database Database Systems Lecture 1

    E-Print Network [OSTI]

    Alechina, Natasha

    Introduction to Database Systems Database Systems Lecture 1 Natasha Alechina www.cs.nott.ac.uk/~nza/G51DBS #12;In this Lecture ∑ Course Information ∑ Databases and Database Systems ∑ Some History questions ∑ Format similar to previous years. #12;Textbook ∑ Recommended textbooks: ∑ `Database Systems

  16. www.strath.ac.uk/engineering Faculty of Engineering

    E-Print Network [OSTI]

    Mottram, Nigel

    . The Faculty of Engineering wishes to thank all of our industrial partners who offer invaluable opportunitieswww.strath.ac.uk/engineering @StrathEng Faculty of Engineering Scholarships #12;Contents University of Strathclyde | Faculty of Engineering Scholarships Contents02 The Faculty of Engineering provides a wide range

  17. www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY

    E-Print Network [OSTI]

    Aickelin, Uwe

    valuation method (CVM) to investigate information effects in the valuation of electricity and waterwww.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY Information Effects in Valuation of Electricity and Water Service Attributes Using Contingent Valuation EPRG Working Paper 1127 Cambridge Working

  18. www.eprg.group.cam.ac.uk EPRGWORKINGPAPER

    E-Print Network [OSTI]

    Aickelin, Uwe

    factors that affect WTP for the attributes considered. Keywords Contingent Valuation Method, Willingnesswww.eprg.group.cam.ac.uk EPRGWORKINGPAPER Abstract Information Effects in Valuation of Electricity and Water Service Attributes Using Contingent Valuation EPRG Working Paper 1127 Cambridge Working Paper

  19. www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY

    E-Print Network [OSTI]

    Aickelin, Uwe

    www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY The Economics of the Nord Stream with the construction of the Yamal-Europe pipeline in the 1990s and continued more recently with the Nord Stream west-European clients. The Nord Stream project has been politically controversial since its inception

  20. Self-induced ac Stark shift in lasers

    SciTech Connect (OSTI)

    Gil, L.; Lippi, G. L. [Universite de Nice Sophia Antipolis, Institut Non Lineaire de Nice, and CNRS, UMR 6618 1361 Route des Lucioles, F-06560 Valbonne (France)

    2011-04-15T23:59:59.000Z

    The ac Stark effect is a well-known, well-established effect associated with the displacement of the atomic energy levels in the presence of an electromagnetic (e.m.) field. As the origin of the e.m. field is irrelevant, a self-induced ac Stark effect should be present in a laser. However, not only has this effect never been reported but it is not included in any laser model. Here, we show that a self-induced ac Stark shift does exist in the theoretical description of a two-level laser, provided that the reduced equations are derived not from the rotating-wave approximation, but from the full density matrix formulation. Interesting fundamental consequences are discussed and quantitative estimates of the self-induced frequency shift resulting from the laser field's ac Stark shift are obtained for a variety of lasers. We find that the effect is generally small but (at least in some cases) measurable and that the transfer of laser amplitude noise into frequency noise may play a role in future, ultrahigh-precision metrological applications.

  1. ACS DIVISION OF POLYMERIC MATERIALS: SCIENCE AND ENGINEERING

    E-Print Network [OSTI]

    Gilchrist, James F.

    , interpenetrating polymer networks, IPNs. Other topics included the mechanical and morphological aspects of polymers textbook, "Introduction to Physical Polymer Science," with Wiley, 2004. While in retirement, he remains for Polymer Science and Engineering, and served as Education Chairman. His efforts at ACS have included

  2. SCHOOL OF ENGINEERING www.abdn.ac.uk/engineering

    E-Print Network [OSTI]

    Levi, Ran

    , in the planning and commissioning of equipment, and in site and plant supervision. Engineers require a wide rangeSCHOOL OF ENGINEERING www.abdn.ac.uk/engineering POSTGRADUATE GUIDE #12;MSc Renewable Energy MSc Safety Engineering for Oil & Gas MSc Subsea Engineering MSc Oil & Gas Engineering MSc Project Management

  3. www.cardiff.ac.uk/ifp International Foundation

    E-Print Network [OSTI]

    Davies, Christopher

    www.cardiff.ac.uk/ifp International Foundation Programme Business, Engineering, Health & Life Sciences #12;Welcome to the International Foundation Programme at Cardiff University What is the IFP? The International Foundation Programme (IFP) is a one-year academic programme designed to give you the academic

  4. 1go.warwick.ac.uk/engineering ENGINEERING

    E-Print Network [OSTI]

    Davies, Christopher

    1go.warwick.ac.uk/engineering 2012-13 ENGINEERING UNDERGRADUATE BROCHURE #12;2 Engineering Prospectus 2012-13 "BECAUSE ENGINEERING IS INEXTRICABLY TIED TO PEOPLE, IT CANNOT BE JUST AN APPLIED PHYSICAL SCIENCE; IT IS ALSO AN APPLIED SOCIAL SCIENCE. ... (THE ENGINEER'S)... RAISON D'√?TRE IS TO SERVE

  5. Carbon Nanotube Field-effect Transistors: AC Performance Capabilities.

    E-Print Network [OSTI]

    Pulfrey, David L.

    Carbon Nanotube Field-effect Transistors: AC Performance Capabilities. D.L. Pulfrey, D.L. John-barrier carbon nanotube field-effect transistors are examined via simulations using a self-consistent Schrödinger is known about the DC capabilities of carbon nanotube field-effect transistors [1,2,3], and devices

  6. www.glasgow.ac.uk/library The University Library

    E-Print Network [OSTI]

    Guo, Zaoyang

    www.glasgow.ac.uk/library The University Library for staff #12;www.facebook.com/uofglibrary twitter.com/uofglibrary instagram.com/uoglibrary Library Blog universityofglasgowlibrary.wordpress.com Welcome to the University Library Where is the Library? It's on Hillhead Street, next to the Hunterian Art Gallery, at the heart

  7. POLICY ON CALENDAR SUBMISSIONS University Policy No: AC1120

    E-Print Network [OSTI]

    Victoria, University of

    1 POLICY ON CALENDAR SUBMISSIONS University Policy No: AC1120 Classification: Academic and Students relevant university policies and procedures, academic policies and regulations, university fees, courses and programs of study. The purpose of this policy is to outline requirements for publishing the University

  8. University Policy No.: AC1130 Classification: Academic and Students

    E-Print Network [OSTI]

    Victoria, University of

    University Policy No.: AC1130 Classification: Academic and Students Approving Authority: Board Last Editorial Change: Mandated Review: 2018 PURPOSE 1.00 The purpose of this policy is to provide guidance on the establishment and governance of student awards by the university. POLICY 2.00 Student

  9. ACS WFC CCD Radiation Test: The Radiation Environment

    E-Print Network [OSTI]

    Sirianni, Marco

    of external surfaces by naturally occurring atomic oxygen. CCD detectors are particularly vulnerable to damage damage. A comprehensive discussion of the types of radiation damage known to occur in CCDs is beyond1 ACS WFC CCD Radiation Test: The Radiation Environment Michael R. Jones Space Telescope Science

  10. University Policy No.: AC1110 Classification: Academic and Students

    E-Print Network [OSTI]

    Victoria, University of

    other than the university community. DEFINITIONS 2.00 EDUCATIONAL SERVICE CONTRACT means a contract://web.uvic.ca/univsec/pol_pro/pol1000/1002SA.html) 8.00 Approval of an Educational Service Contract will be granted by the Dean andUniversity Policy No.: AC1110 Classification: Academic and Students EDUCATIONAL SERVICE

  11. 2D 3D * iklee)@yonsei.ac.kr

    E-Print Network [OSTI]

    Lee, In-Kwon

    1 2012 2D 3D * 0 , 1 , 2 0,2 1 ( 0 skrcjstk, 2 iklee)@yonsei.ac.kr 1 rinthel Science, Yonsei University. 1 Dept. of Information Media, The University of Suwon. 2D 3D . 2D - , 3D (Disparity) 3D . . 1. 3D 3D . 3D 3D [1

  12. University Policy No.: AC1135 Classification: Academic and Students

    E-Print Network [OSTI]

    Victoria, University of

    or graduate certificate or diploma program must have a clearly defined educational objective and rationaleUniversity Policy No.: AC1135 Classification: Academic and Students POLICY FOR THE ESTABLISHMENT Approving Authority: Senate OF CERTIFICATE AND DIPLOMA Effective Date: December/07 PROGRAMS Supersedes: May

  13. University Policy No.: AC1200 Classification: Academic and Students

    E-Print Network [OSTI]

    Victoria, University of

    University Policy No.: AC1200 Classification: Academic and Students GUIDELINES ON CONFLICT be no unfair restrictions on the educational and employment opportunities of all students nor, or applying to be enrolled, in a course or program offered by the University for credit towards

  14. www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY

    E-Print Network [OSTI]

    Aickelin, Uwe

    of the nuclear element of the energy decision process is #12;www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON, energy efficiency, distributed power generation and renewable energy sources. Opponents to nuclear power and Nuclear Power Generation EPRG Working Paper EPRG 0912 John Ash The issue of whether to include nuclear

  15. www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY

    E-Print Network [OSTI]

    Aickelin, Uwe

    www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY Nuclear Energy in the Enlarged with with nuclear energy has also increased markedly in recent years. Two contrasting examples of nuclear experience to concerns for Europe's energy security. As citizens in these countries shift to electric heating

  16. www.eprg.group.cam.ac.uk EPRGWORKINGPAPER

    E-Print Network [OSTI]

    Aickelin, Uwe

    www.eprg.group.cam.ac.uk EPRGWORKINGPAPER Abstract Nuclear Energy in the Enlarged European Union of nuclear energy and notes that it has shifted significantly as the European Union has grown from 15 member states to 27. The proportion of member states with nuclear energy experience has increased markedly. Also

  17. www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY

    E-Print Network [OSTI]

    Aickelin, Uwe

    ). There are resource shortages already in the nuclear energy industry, and currently the Supplier to the nuclear in existence. The latter problems pose a risk for the Suppliers to operators in the nuclear energy industrywww.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY Third Party Nuclear Liability

  18. FBDEditor: {ldalove, atang34, syjsmk, jbyoo}@konkuk.ac.kr

    E-Print Network [OSTI]

    }@konkuk.ac.kr : Programmable Logic Controller (PLC) . Field Programmable Gate Array (FPGA) . PLC Function Controller (PLC) Field Programmable Gate Array (FPGA) . PLC IEC 61131-3 5 (LD: Ladder diagram) . FBD Function Block(FB) . FBD PLC . FPGA Hardware Description Language

  19. Evaluating the Rationale for the Utility-Accessible External Disconnect Switch: Preprint

    SciTech Connect (OSTI)

    Coddington, M. H.

    2008-05-01T23:59:59.000Z

    This paper describes the utility-accessible alternating current (AC) external disconnect switch (EDS) for distributed generators, including photovoltaic (PV) systems, which is a hardware feature that allows a utility's employees to manually disconnect a customer-owned generator from the electricity grid.

  20. Sanitary Sewer System Management Plan

    E-Print Network [OSTI]

    Contract Number DE- AC02-05CH11231 #12;#12;LBNL SSMP TABLE OF CONTENTS SSMP Section Tab / Page # Section 0 0-1: LBNL CIWQS Sewer System Questionnaire Attachment 0-2: LBNL Facility Sanitary Sewer Collection System Overview Map Section i: Goals None Section ii: Organization Attachment ii-1: LBNL Notice of Intent

  1. Direct current power transmission systems

    SciTech Connect (OSTI)

    Padiyar, K.R.

    1991-01-01T23:59:59.000Z

    This book represents text on HVDC transmission available. It deals with the various aspects of the state of the art in HVDC transmission technology. This book presents many aspects of interactions of AC/DC systems. Modeling and analysis of DC systems are also discussed in detail.

  2. Sensorless Direct Torque Control For Salient Pole PMSM Based on Extended Kalman Filter Fed By AC/DC/AC Converter

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Sensorless Direct Torque Control For Salient ­ Pole PMSM Based on Extended Kalman Filter Fed By AC is proposed. The Direct Torque Control (DTC) technique for PMSM is receiving increasing attention due on the stochastic intromission, in others words, noise. The PMSM is fed by an indirect power electronic converter

  3. Hixson named ACS award winner | EMSL

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

    work altering enzyme composition of arogenate dehydratase in plants in order to reduce lignin levels and to study the systems level effects of such changes by using multi-omics...

  4. www.strath.ac.uk Strathclyde Expertise

    E-Print Network [OSTI]

    Mottram, Nigel

    System in Latin America, one of the few TBAs in the world to be regulated by an international treaty. He and Sanitation, Renewable Energy, Health, Education and Enterprise. We attract the brightest young students

  5. EA Systems Examples Induction and Recursion Length Measuring the Universe Analysis Number systems of different lengths,

    E-Print Network [OSTI]

    Forster, T.E.

    EA Systems Examples Induction and Recursion Length Measuring the Universe Analysis Number systems of Mathematics University of Bristol April 21, 2008 Richard.Pettigrew@bris.ac.uk Natural number systems and infinitesimal analysis #12;EA Systems Examples Induction and Recursion Length Measuring the Universe Analysis

  6. Eliciting Safety Policy and Balancing with Operational Fitness in Systems of Systems

    E-Print Network [OSTI]

    Kelly, Tim

    Eliciting Safety Policy and Balancing with Operational Fitness in Systems of Systems Georgios Despotou High Integrity Systems Group Department of Computer Science University of York York, UK george@cs.york.ac.uk Martin Hall-May High Integrity Systems Group Department of Computer Science University of York York, UK

  7. Investigation of Multi-Frequency Power Transmission and System

    E-Print Network [OSTI]

    Barazarte Conte, Ronald

    2012-10-19T23:59:59.000Z

    BACKGROUND .................................................................................. 6 A. High Voltage Direct Current Transmission (HVDC) ................ 6 B. Flexible AC Transmission System (FACTS) ............................ 12... ......................................................................................................................... 80 viii LIST OF FIGURES FIGURE Page 1 Schematic of a HVDC Transmission Line...

  8. Expedited Permitting Process for Solar Photovoltaic Systems (Vermont)

    Broader source: Energy.gov [DOE]

    Vermont has established an expedited permitting process for solar photovoltaic systems that are 10 kilowatts-AC (kW) or less. In order to interconnect and net meter, electric customers in Vermont...

  9. www.careers.ox.ac.uk ENGINEERING &

    E-Print Network [OSTI]

    Melham, Tom

    Carpmaels & Ransford Cisco Systems Contact Singapore Costello Medical Consulting Double Negative Visual Consulting CoreFiling Limited Defence Science and Technology Laboratory (DSTL) Dehns Delcam plc EDF Energy Huddle Imagination Technologies IMC Financial Markets J A Kemp Jaguar Land Rover JCB Lloyd's Register

  10. E-Print Network 3.0 - automotive power systems Sample Search...

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

    air conditioning systems used in the automotive industry are based on vapour-compression refrigeration... systems of light duty vehicles. An AC compressor can add up to 5-6 kW...

  11. Tel: +44 (0) 1603 591574 Email: business@uea.ac.uk Web: www.uea.ac.uk/business Experts model buyer behaviour

    E-Print Network [OSTI]

    Everest, Graham R

    Tel: +44 (0) 1603 591574 Email: business@uea.ac.uk Web: www.uea.ac.uk/business Experts model buyer their customers to make buying decisions. When you are in the business of printing newspapers, accurate ­ the UK's largest independently-owned regional media business ­ on a project which saw academics from

  12. SNL software manual for the ACS Data Analytics Project.

    SciTech Connect (OSTI)

    Stearley, Jon R.; McLendon, William Clarence, III; Rodrigues, Arun F.; Williams, Aaron S.; Hooper, Russell Warren; Robinson, David Gerald; Stickland, Michael G.

    2011-10-01T23:59:59.000Z

    In the ACS Data Analytics Project (also known as 'YumYum'), a supercomputer is modeled as a graph of components and dependencies, jobs and faults are simulated, and component fault rates are estimated using the graph structure and job pass/fail outcomes. This report documents the successful completion of all SNL deliverables and tasks, describes the software written by SNL for the project, and presents the data it generates. Readers should understand what the software tools are, how they fit together, and how to use them to reproduce the presented data and additional experiments as desired. The SNL YumYum tools provide the novel simulation and inference capabilities desired by ACS. SNL also developed and implemented a new algorithm, which provides faster estimates, at finer component granularity, on arbitrary directed acyclic graphs.

  13. The University of Edinburgh System Description for IWSLT 2007 Josh Schroeder, Philipp Koehn

    E-Print Network [OSTI]

    Edinburgh, University of

    of Informatics University of Edinburgh 2 Buccleuch Place, Edinburgh EH8 9LW Scotland, United Kingdom j.schroeder@ed.ac.uk, pkoehn@inf.ed.ac.uk Abstract We present the University of Edinburgh's submission for the IWSLT 2007 track, and present additional results of our experiments using the open-source Moses MT system

  14. Determinationof the power transfer capacityof a UPFCwith considerationof the system and

    E-Print Network [OSTI]

    Qu, Zhihua

    transmission system (FACTS) devices provide new altematives in expanding the power transmission capacity inverters are interconnected via the DC link provided by a DC storage capacitor. The real power can flow reactive power at its own AC terminals. The series inverter injects onto the line voltage an AC voltage Vr

  15. Variable Frequency AC Drives for Cooling Tower Energy Efficiency

    E-Print Network [OSTI]

    Corey, R. W.

    1982-01-01T23:59:59.000Z

    speed fan drives. Fan speed is reduced to yield specific water temperatures at thermal conditions less difficult than design. The reduced air flow is accomplished by reduced fan power consumption, resulting in optimum cooling tower operation... and economics. Automatic fan speed control by sensing cold water temperature is the economic essence of the application of adjustable frequency power to A-C fan motors. 2.2 Cell Partitions In some multi-cell mechanical-draft cooling towers, the isolation...

  16. AC electrokinetic manipulation of selenium nanoparticles for potential nanosensor applications

    SciTech Connect (OSTI)

    Mahmoodi, Seyed Reza [School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of); Bayati, Marzieh, E-mail: m-bayati@tums.ac.ir [School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of); Hosseinirad, Somayeh [School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of); Foroumadi, Alireza [Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of); Gilani, Kambiz [Department of Pharmaceutics, School of Pharmacy, Tehran University of Medical Science, Tehran (Iran, Islamic Republic of); Rezayat, Seyed Mahdi [School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran (Iran, Islamic Republic of)

    2013-03-15T23:59:59.000Z

    Highlights: ? Se nanoparticles were synthesized using a reverse-microemulsion process. ? AC osmotic fluid flow repulses the particles from electrode edges. ? Dielectrophoretic force attracts the particles to electrode edges. ? Dielectrophoresis electrode showed non-ohmic behavior. ? The device can potentially be used as a nanosensor. - Abstract: We report the AC electrokinetic behavior of selenium (Se) nanoparticles for electrical characterization and possible application as micro/nano devices. selenium Se nanoparticles were successfully synthesized using a reverse-microemulsion process and investigated structurally using X-ray diffraction and transmission electron microscope. Interdigitated castellated ITO and non-castellated platinum electrodes were employed for manipulation of suspended materials in the fluid. Using ITO electrodes at low frequency limits resulted in deposition of Se particles on electrode surface. When Se particles exposed to platinum electrodes in the 10 HzĖ1 kHz range and V {sub p?p}> 8, AC osmotic fluid flow repulses the particles from electrode edges. However, in 10 kHzĖ10 MHz range and V {sub p?p}> 5, dielectrophoretic force attracts the particles to electrode edges. As the Se particle concentration increased, the trapped Se particles were aligned along the electric field line and bridged the electrode gap. The device was characterized and can potentially be useful in making micro/nano electronic devices.

  17. Harmonic mixing in two coupled qubits: quantum synchronization via ac drives

    E-Print Network [OSTI]

    S. E. Savel'ev; Z. Washington; A. M. Zagoskin; M. J. Everitt

    2012-10-12T23:59:59.000Z

    Simulating a system of two driven coupled qubits, we show that the time-averaged probability to find one driven qubit in its ground or excited state can be controlled by an ac drive in the second qubit. Moreover, off-diagonal elements of the density matrix responsible for quantum coherence can also be controlled via driving the second qubit, i.e., quantum coherence can be enhanced by appropriate choice of the bi-harmonic signal. Such a dynamic synchronization of two differently driven qubits has an analogy with harmonic mixing of Brownian particles forced by two signals through a substrate. Nevertheless, the quantum synchronization in two qubits occurs due to multiplicative coupling of signals in the qubits rather than via a nonlinear harmonic mixing for a classical nano-particle.

  18. Contract DE-AC05-76RL01830 Modification M947

    E-Print Network [OSTI]

    Contract DE-AC05-76RL01830 Modification M947 J-F-i Part III ­ List of Documents, Exhibits;Contract DE-AC05-76RL01830 Modification M947 J-F-1 OPERATIONAL AGREEMENT BETWEEN THE OFFICE OF SCIENCE;Contract DE-AC05-76RL01830 Modification M947 J-F-2 OPERATIONAL AGREEMENT BETWEEN THE OFFICE OF SCIENCE

  19. Contract Number: DE-AC05-76RL01830 Modification M971

    E-Print Network [OSTI]

    Contract Number: DE-AC05-76RL01830 Modification M971 PART III ­ List of Documents, Exhibits-Owned Facilities and Real Property J-J-i #12;Contract Number: DE-AC05-76RL01830 Modification M971 ADVANCE AGREEMENT that in consideration of the extension of Contract No. DE- AC05-76RL01830 (hereinafter referred to as "the PNNL Prime

  20. Contract No.: DE-AC02-09CH11466 ATTACHMENT J.12

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    Contract No.: DE-AC02-09CH11466 Section J Appendix L J-L-1 ATTACHMENT J.12 APPENDIX L ADMINISTRATIVE SERVICES TO BE PROVIDED TO PPPL BY PRINCETON UNIVERSITY Contract No. DE-AC02-09CH11466 #12;Contract No.: DE-AC02-09CH11466 Section J Appendix L J-L-2 ADMINISTRATIVE SERVICES TO BE PROVIDED TO PPPL

  1. Programmable AC power supply for simulating power transient expected in fusion reactor

    SciTech Connect (OSTI)

    Halimi, B. [Seoul National Univ., Seoul 151-744 (Korea, Republic of); Suh, K. Y. [Seoul National Univ., Seoul 151-744 (Korea, Republic of); PHILOSOPHIA, 1 Gwanak Ro, Gwanak Gu, Seoul 151-744 (Korea, Republic of)

    2012-07-01T23:59:59.000Z

    This paper focus on control engineering of the programmable AC power source which has capability to simulate power transient expected in fusion reactor. To generate the programmable power source, AC-AC power electronics converter is adopted to control the power of a set of heaters to represent the transient phenomena of heat exchangers or heat sources of a fusion reactor. The International Thermonuclear Experimental Reactor (ITER) plasma operation scenario is used as the basic reference for producing this transient power source. (authors)

  2. E-Print Network 3.0 - ac power flow Sample Search Results

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

    12;244 MIT... in a periodic fashion is referred to as "ac voltage." ... Source: Massachusetts Institute of Technology (MIT), Computer Science and Artificial Intelligence...

  3. E-Print Network 3.0 - ac-dc power transmission Sample Search...

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

    Ris Summary: (AEDVESESY) DFIG control Power control loop Speed control loop Wind turbine control Measurement grid point AC DC... reference DFIG control Power control...

  4. E-Print Network 3.0 - ac transit demos Sample Search Results

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

    Streaming Application Summary: , United Kingdom Email: bocek--hecht--hausheer--stiller@ifi.uzh.ch, yehia@comp.lancs.ac.uk Abstract... --This demo shows the CompactPSH...

  5. E-Print Network 3.0 - acs residual ischemic Sample Search Results

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

    Search Sample search results for: acs residual ischemic Page: << < 1 2 3 4 5 > >> 1 Brain Research 961 (2003) 2231 www.elsevier.comlocatebrainres Summary: further...

  6. E-Print Network 3.0 - ac electrokinetic pump Sample Search Results

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

    Summary: recently been unified with other nonlinear electrokinetic phenomena in microfluidics (2), such as AC... -charge electrokinetic phenomena are finding many new...

  7. E-Print Network 3.0 - ac electrokinetic micropumps Sample Search...

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

    research Summary: electrokinetics AC electro-osmosis Induced-charge electrophoresis Microfluidics The field of nonlinear "induced... and others, focused attention on nonlinear...

  8. E-Print Network 3.0 - ac joint reconstruction Sample Search Results

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

    reconstructed uniquely and stably from measurement data, ac- quired at all source... TOMOGRAPHY 205 Fig. 5. Reconstructed images corresponding to the noise model in ... Source:...

  9. DE-AC05-00OR22725 Modification No. 341

    E-Print Network [OSTI]

    Government) to enter into Contract DE-AC05-990R22725 for the Management and Operationofthe OakRidge National

  10. DE-AC05-00OR22725 Modification No. 341

    E-Print Network [OSTI]

    and the Contractor entered into Agreement No. DE-AC05-000R22725, or a Supplemental Agreement(s) thereto, providing

  11. E-Print Network 3.0 - ac-dc parallel tie-lines Sample Search...

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

    of controlling inductions motors driven through ACDC... AC inverter through a transformer and an ACDC rectifier The connection line between the rectifier... range...

  12. System specification for the plutonium stabilization and packaging system

    SciTech Connect (OSTI)

    NONE

    1996-07-01T23:59:59.000Z

    This document describes functional design requirements for the Plutonium Stabilization and Packaging System (Pu SPS), as required by DOE contract DE-AC03-96SF20948 through contract modification 9 for equipment in Building 707 at Rocky Flats Environmental Technology Site (RFETS).

  13. An Integrated System Simulation Approach for Wireless Networked Control Systems

    E-Print Network [OSTI]

    Koutsoukos, Xenofon D.

    Vanderbilt University Nashville, TN, USA Abstract--Cyber-Physical Systems (CPS), such as networked control wireless networks. Accurate modeling of these communication networks is essential in the design and verification of CPS. Controller design needs to take into ac- count the wireless channel characteristics (e

  14. New Automotive Air Conditioning System Simulation Tool Developed in MATLAB/Simulink

    SciTech Connect (OSTI)

    Kiss, T.; Chaney, L.; Meyer, J.

    2013-07-01T23:59:59.000Z

    Further improvements in vehicle fuel efficiency require accurate evaluation of the vehicle's transient total power requirement. When operated, the air conditioning (A/C) system is the largest auxiliary load on a vehicle; therefore, accurate evaluation of the load it places on the vehicle's engine and/or energy storage system is especially important. Vehicle simulation software, such as 'Autonomie,' has been used by OEMs to evaluate vehicles' energy performance. A transient A/C simulation tool incorporated into vehicle simulation models would also provide a tool for developing more efficient A/C systems through a thorough consideration of the transient A/C system performance. The dynamic system simulation software Matlab/Simulink was used to develop new and more efficient vehicle energy system controls. The various modeling methods used for the new simulation tool are described in detail. Comparison with measured data is provided to demonstrate the validity of the model.

  15. Desiccant-Based Combined Systems

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    and Testing Final Report Phase 4 August 2004 By J. Fischer SEMCO J. Sand Oak Ridge National Laboratory #12 System Development and Testing Final Report: Phase 4 August 2004 J. Fischer SEMCO, Inc. J. Sand Oak Ridge by UT-BATTELLE, LLC for the U.S. DEPARTMENT OF ENERGY under contract DE-AC05-00OR22725 #12;#12;iii

  16. PAMPA II Advanced Charting System

    E-Print Network [OSTI]

    Inbarajan, Prabhu Anand

    2004-09-30T23:59:59.000Z

    where the project is heading, and if needed, then look into the finer level details by drilling down to locate and correct problems. The objective of this thesis is to build an Advanced Charting System (ACS), which would act as a companion to PAMPA 2...

  17. LinShim6 -Implementation of the Shim6 protocol http://inl.info.ucl.ac.be/LinShim6

    E-Print Network [OSTI]

    Bonaventure, Olivier

    LinShim6 - Implementation of the Shim6 protocol http://inl.info.ucl.ac.be/LinShim6 Documentation at http://inl.info.ucl. ac.be/publications/shim6-masterthesis. Like the whole project, this documentation

  18. Contract DE-AC06-08RL14788

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New SubstationCleanCommunity2Workshops 2008O"Program andAC02-07CH11358December

  19. Analysis of the Irregular Pulsations of AC Her

    E-Print Network [OSTI]

    Z. Kollath; J. R. Buchler; T. Serre; J. Mattei

    1997-07-08T23:59:59.000Z

    The AAVSO lightcurve data of the irregularly pulsating star AC Herculis of the RV Tau class are analysed. The lightcurve is shown to be incompatible with a periodic, or even multiperiodic pulsation, even if allowance is made for evolution. Instead the best explanation is that the irregularly alternating cycles are a manifestation of low dimensional chaos. The lightcurve is found to be generated by a 3 or 4 dimensional dynamics -- 3 or 4 first order ODEs. The (Lyapunov) fractal dimension of the underlying dynamic attractor is computed to be d_L ~ 2.2, smaller than the value of d_L ~ 3.1 found for R Sct.

  20. www.climate.iitb.ac.in 1st CLIMATE SCIENCE AND

    E-Print Network [OSTI]

    Sarawagi, Sunita

    www.climate.iitb.ac.in 1st CLIMATE SCIENCE AND POLICY WORKSHOP (CSPW)(CSPW) 6th & 7th March, 2014 a scientific understanding of regional climate change and connect it to impacts and effective response. www.climate.iitb.ac.in #12;Interdisciplinary Programme in Climate Studies Indian Institute of Technology Bombay The Climate

  1. Synthesis Gas Production from Partial Oxidation of Methane with Air in AC Electric Gas Discharge

    E-Print Network [OSTI]

    Mallinson, Richard

    Synthesis Gas Production from Partial Oxidation of Methane with Air in AC Electric Gas Discharge K 73019 Received October 11, 2002 In this study, synthesis gas production in an AC electric gas discharge of methane and air mixtures at room temperature and ambient pressure was investigated. The objective

  2. NEW ASPECTS OF SOME SMALL-SIGNAL ac FREQUENCY RESPONSE FUNCTIONS J. Ross MACDONALD

    E-Print Network [OSTI]

    Macdonald, James Ross

    NEW ASPECTS OF SOME SMALL-SIGNAL ac FREQUENCY RESPONSE FUNCTIONS J. Ross MACDONALD Department. It was shown by Macdonald and Cook [5] that an admittance closely related to eq. (1) with n 1 = 0 and n 2 = n]. This analysis showed that #12;160 J. Ross Macdonald/Small-signal ac frequency response functions the data did

  3. For information on current fee levels, see: www.strath.ac.uk/registry/students/finance

    E-Print Network [OSTI]

    Mottram, Nigel

    Fees For information on current fee levels, see: www.strath.ac.uk/registry/students/finance How Enquiries can be made to either of the following in the Department of Accounting & Finance: Professor Dick Davies Course Director, Investment & Finance t: +44 (0)141 548 3710 e: jr.davies@strath.ac.uk Barbara

  4. Contract Number: DE-AC05-76RL01830 Modification M920

    E-Print Network [OSTI]

    Contract Number: DE-AC05-76RL01830 Modification M920 Part III ­ List of Documents, Exhibits, And Other Attachments Section J List of Attachments J ­ i #12;Contract Number: DE-AC05-76RL01830

  5. Power control of a wind farm with active stall wind turbines and AC grid connection

    E-Print Network [OSTI]

    Power control of a wind farm with active stall wind turbines and AC grid connection Anca D. Hansen1 controller for a wind farm made-up exclusively of active stall wind turbines with AC grid connection wind farm control involves both the control on wind turbine level as well as the central control

  6. Ultrafast high-pressure AC electro-osmotic pumps for portable biomedical microfluidics

    E-Print Network [OSTI]

    Bazant, Martin Z.

    Ultrafast high-pressure AC electro-osmotic pumps for portable biomedical microfluidics Chien details the development of an integrated AC electro-osmotic (ACEO) microfluidic pump for dilute (100 mM) biological solutions in separate microfluidic devices, with potential applications in portable

  7. ePOWER Seminar AC solar cells: A new breed of PV power generation

    E-Print Network [OSTI]

    Abolmaesumi, Purang

    ePOWER Seminar AC solar cells: A new breed of PV power generation Professor Faisal Khan Assistant dc output which needs to be processed and inverted for ac applications. Using a modern manufacturing facility, PV panels could be mass produced without any apparent issues. Unfortunately, power converters

  8. s.haszeldine@ed.ac.uk Scottish Centre for Carbon Storage, Petrobras 2008 1 University of Edinburgh (est 1583)

    E-Print Network [OSTI]

    Haszeldine, Stuart

    .haszeldine@ed.ac.uk Scottish Centre for Carbon Storage, Petrobras 2008 5 Connecting CCS companies 2007: Largest CO2 Storage in India Predicting seal in overburden Natural CO2 sites #12;s.haszeldine@ed.ac.uk Scottish Centre://www.geos.ed.ac.uk/sccs/ s.haszeldine@ed.ac.uk Scottish Centre for Carbon Storage, Petrobras 2008 12 7: CO2 Capture from

  9. The Anticoincidence System of the PAMELA Satellite Experiment

    E-Print Network [OSTI]

    Haviland, David

    ). It records signals from the 16 AC photomultipliers and from various sensors for over-current and temperature, consisting of (2.0¬Ī0.2)Hz good triggers and (6.4¬Ī0.5)Hz background. Inclusion of the AC system in the trigger condition to reduce background (for the purpose of data handling capacity) leads to losses of good triggers

  10. Data:8364dcbb-76ca-48ac-929d-9738a1432ac7 | 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 Office695810186 No revisione0a2d50bdf No revision has9-c45258b300ac Noc1e69d7992f-3f3dd886bf1c1dc0188f0 No revision

  11. COUNTRY INSTITUTION DATE WEB ADDRESS IRAN University of Art Isfahn 08.03.2007 http://www.aui.ac.ir

    E-Print Network [OSTI]

    Di Pillo, Gianni

    COUNTRY INSTITUTION DATE WEB ADDRESS IRAN University of Art Isfahn 08.03.2007 http://www.aui.ac.ir IRAN Isfahn University of Technology 08.03.2007 http://www.iut.ac.ir IRAN The University of Isfahn 15/03/2011 http://www.ui.ac.ir IRAN Shahid Bahonar University of Kermn 06.06.2005 http

  12. Systems and methods for commutating inductor current using a matrix converter

    DOE Patents [OSTI]

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

    2012-10-16T23:59:59.000Z

    Systems and methods are provided for delivering current using a matrix converter in a vehicle. An electrical system comprises an AC interface, a first conversion module coupled to the AC interface, an inductive element coupled between the AC interface and the first conversion module, and a control module coupled to the first conversion module. The control module is configured to operate the first conversion module in a bidirectional operating mode to commutate current bidirectionally. When a magnitude of the current through the inductive element is greater than a first threshold value, the control module operates the conversion module in a unidirectional operating mode, wherein current is commutated unidirectionally.

  13. E-Print Network 3.0 - autonomous power-supply systems Sample...

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

    then indicate "System warming up". 3) Turn on the chiller... on the power supply rear panel to "on". The AC power LASER EMISSION indicator will light on the front... the SHUTTER...

  14. Measurement-Based Evaluation of Installed Filtration System Performance in Single-Family Homes

    E-Print Network [OSTI]

    Chan, Wanyu Rengie

    2014-01-01T23:59:59.000Z

    Systems LBNL-XXXX 8. Literature Cited AHAM (2006).ANSI/AHAM Standard AC-1-2006 Method for Measuring theHome Appliance Manufactures (AHAM), using Clean Air Delivery

  15. Energy Comparison Between Conventional and Chilled Water Thermal Storage Air Conditioning Systems

    E-Print Network [OSTI]

    Sebzali, M.; Hussain, H. J.; Ameer, B.

    2010-01-01T23:59:59.000Z

    , encouraged by government subsidies and driven by the rapid and continual expansion in building construction, urban development, and the heavy reliance on Air Conditioning (AC) systems for the cooling of buildings. The Chilled Water Thermal Storage (CWTS...

  16. Photovoltaic power plant as FACTS devices in multi-feeder systems

    E-Print Network [OSTI]

    Moawwad, Ahmed

    This paper illustrates possible configurations for a large-scale photovoltaic power plant (PV), to operate as a FACTS (flexible AC transmission system) device in addition to operating as a source of renewable power generation. ...

  17. Power Quality/Harmonic Detection: Harmonic Control in Electric Power Systems for the Telecommunications Industry

    E-Print Network [OSTI]

    Felkner, L. J.; Waggoner, R. M.

    The control of harmonics in power systems continues to be a major concern in the telecommunications industry. AC/DC telecommunication conversion equipment has rarely been thought of as playing a major role in the harmonic interaction problem. Yet...

  18. Multiple-scattering in radar systems: A review Alessandro Battaglia a,b,, Simone Tanelli c

    E-Print Network [OSTI]

    Hogan, Robin

    Review Multiple-scattering in radar systems: A review Alessandro Battaglia a,b,√, Simone Tanelli c. Tel.: +44 116 2709859. E-mail address: a.battaglia@le.ac.uk (A. Battaglia). Journal of Quantitative Spectroscopy & Radiative Transfer ] (

  19. Application of multi-variable control for automatic frequency controller of HVDC transmission system

    SciTech Connect (OSTI)

    Sanpei, Masatoshi (Electric Power Development Co., Tokyo (Japan)); Kakehi, Atsuyuki; Takeda, Hideo (Toshiba Corp., Tokyo (Japan))

    1994-04-01T23:59:59.000Z

    In an HVDC transmission system that links two ac power systems, the automatic frequency controller (AFC) calculates power to be interchanged between the two ac systems according to their frequencies thereby improving the frequency characteristics of the two power systems. This paper introduces a newly developed dc AFC system, which applies a multi-variable control to the dc system-based frequency control. It is capable of controlling the frequencies of the two ac systems optimally while maintaining their stability. This system was developed for one of Japan's HVDC transmission facilities and produced good results in a combined test using a power system simulator. The field installation will be completed in March 1993, when the AFC system will enter service.

  20. Evaluation of station blackout accidents at nuclear power plants: Technical findings related to unresolved safety issue A-44: Final report

    SciTech Connect (OSTI)

    Not Available

    1988-06-01T23:59:59.000Z

    ''Station Blackout,'' which is the complete loss of alternating current (AC) electrical power in a nuclear power plant, has been designated as Unresolved Safety Issue A-44. Because many safety systems required for reactor core decay heat removal and containment heat removal depend on AC power, the consequences of a station blackout could be severe. This report documents the findings of technical studies performed as part of the program to resolve this issue. The important factors analyzed include: the fequency of loss of offsite power; the probability that emergency or onsite AC power supplies would be unavailable; the capability and reliability of decay heat removal systems independent of AC power; and the likelihood that offsite power would be restored before systems that cannot operate for extended periods without AC power fail, thus resulting in core damage. This report also addresses effects of different designs, locations, and operational features on the estimated frequency of core damage resulting from station blackout events.

  1. Application of the MomentĖSOS Approach to Global Optimization of ...

    E-Print Network [OSTI]

    2013-11-19T23:59:59.000Z

    Nov 18, 2013 ... operating point of an alternating current (AC) power network that is ... shifting transformers to every loop in the network and if the objective is an†...

  2. Learn More About Interconnections | Department of Energy

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

    About Interconnections Learn More About Interconnections EASTERN INTERCONNECTION North America is comprised of two major and three minor alternating current (AC) power grids or...

  3. Methods, systems and apparatus for synchronous current regulation of a five-phase machine

    DOE Patents [OSTI]

    Gallegos-Lopez, Gabriel; Perisic, Milun

    2012-10-09T23:59:59.000Z

    Methods, systems and apparatus are provided for controlling operation of and regulating current provided to a five-phase machine when one or more phases has experienced a fault or has failed. In one implementation, the disclosed embodiments can be used to synchronously regulate current in a vector controlled motor drive system that includes a five-phase AC machine, a five-phase inverter module coupled to the five-phase AC machine, and a synchronous current regulator.

  4. Solving an Air Conditioning System Problem using Constraint Satisfaction

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Solving an Air Conditioning System Problem using Constraint Satisfaction Rapha√ęl Chenouard1 An air conditioning system problem 1.1 Context The design process is a sequence of phases ranging from States (2007)" DOI : 10.1007/978-3-540-74970-7_4 #12;In this paper, an air conditioning system (ACS

  5. Non-Autonomous Systems: Asymptotic Behaviour and Weak Invariance Principles *

    E-Print Network [OSTI]

    Bath, University of

    Non-Autonomous Systems: Asymptotic Behaviour and Weak Invariance Principles * H Logemann & E P Ryan@maths.bath.ac.uk Results pertaining to asymptotic behaviour of solutions of non-autonomous ordinary di#11;erential asymptotically autonomous systems and adaptively controlled systems are highlighted. Key Words: adaptive control

  6. Retrofitting Air Conditioning and Duct Systems in Hot, Dry Climates

    SciTech Connect (OSTI)

    Shapiro, C.; Aldrich, R.; Arena, L.

    2012-07-01T23:59:59.000Z

    This technical report describes CARB's work with Clark County Community Resources Division in Las Vegas, Nevada, to optimize procedures for upgrading cooling systems on existing homes in the area to implement health, safety, and energy improvements. Detailed monitoring of five AC systems showed that three of the five systems met or exceeded air flow rate goals.

  7. Forward and reverse control system for induction motors

    DOE Patents [OSTI]

    Wright, J.T.

    1987-09-15T23:59:59.000Z

    A control system for controlling the direction of rotation of a rotor of an induction motor includes an array of five triacs with one of the triacs applying a current of fixed phase to the windings of the rotor and four of the triacs being switchable to apply either hot ac current or return ac current to the stator windings so as to reverse the phase of current in the stator relative to that of the rotor and thereby reverse the direction of rotation of the rotor. Switching current phase in the stator is accomplished by operating the gates of pairs of the triacs so as to connect either hot ac current or return ac current to the input winding of the stator. 1 fig.

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

    E-Print Network [OSTI]

    Gopman, Daniel B; Kent, Andrew D

    2012-01-01T23:59:59.000Z

    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.

  9. Segmented superconducting tape having reduced AC losses and method of making

    DOE Patents [OSTI]

    Foltyn, Stephen R. (Los Alamos, NM); Jia, Quanxi (Los Alamos, NM); Arendt, Paul N. (Los Alamos, NM); Holesinger, Terry G. (Los Alamos, NM); Wang, Haiyan (Los Alamos, NM)

    2009-09-22T23:59:59.000Z

    A superconducting tape having reduced AC losses. The tape has a high temperature superconductor layer that is segmented. Disruptive strips, formed in one of the tape substrate, a buffer layer, and the superconducting layer create parallel discontinuities in the superconducting layer that separate the current-carrying elements of the superconducting layer into strips or filament-like structures. Segmentation of the current-carrying elements has the effect of reducing AC current losses. Methods of making such a superconducting tape and reducing AC losses in such tapes are also disclosed.

  10. Measurement of HVAC system performance and local ventilation using passive perfluorocarbon tracer technology

    SciTech Connect (OSTI)

    Dietz, R.N.; Goodrich, R.W.

    1995-06-01T23:59:59.000Z

    In April of 1993, two (2) perfluorocarbon tracer (PFT) ventilation/indoor air quality assessment tests were performed in the Gleeson Hall building of the SUNY Farmingdale campus. The building was being modified, in part, as a result of significant occupant complaints of perceived poor air quality. The four story building had a basement first floor with air supplied normally by an HVAC system labelled as AC1. During this study, AC1 was inoperational and the basement interior rooms (walls) were primarily gone; the other three floors were still being used for classes. It is possible that a sense of poor air quality may have been perceived by first-floor occupants because they were working in the basement, but this issue could not be addressed. The second floor had two (2) lecture halls--Rm 202 (handled by AC4) and Rm 204 (handled by AC5); the balance of the second floor interior rooms and corridors was split between two other air handling systems, AC2 for the west side of the building and AC3 for the east side. The remaining 3rd and 4th floors were also split about evenly between AC2 and AC3. The perimeter rooms, equipped with wall units having their own outside air (OA) source plus centralized return air (RA) bypasses, were not included in this testing which was restricted to the basement floor (1st floor) and the four operating air handling systems, AC2 to AC5, during Test 1 and only AC2 to AC5 during Test 2. Two types of tests were performed using the full suite of 5 PFT types available. The first test was designed to measure the infiltration, exfiltration, and air exchange between the 5 AC zones above and the second test used the 5th tracer, which had been in the basement, as a distributed source throughout the four other zones to act as a surrogate pollutant source. This report provides final conclusions of both tests and suggestions regarding its usefulness in similar building ventilation and indoor air quality assessments.

  11. Next generation solar bimodal systems

    SciTech Connect (OSTI)

    Babanin, V.I.; Ender, A.Y.; Kolyshkin, I.N.; Kuznetsov, V.I.; Sitnov, V.I. [Ioffe Physico-Technical Institute, St. Petersburg (Russian Federation); Paramonov, D.V. [Westinghouse Science and Technology Center, Pittsburgh, PA (United States)

    1997-12-31T23:59:59.000Z

    One of the principal advantages of a solar thermal propulsion system as compared to a conventional chemical propulsion one is high specific impulse which is proportional to the square root of a propellant temperature. Obviously, next generation solar propulsion and bimodal systems must take advantage of high and ultra-high temperatures. This requires use of an appropriate energy conversion system capable to take advantage of high temperature potentially achievable in a solar receiver. High efficiency and power density of a high temperature thermionic converter open new perspectives in the development of advanced bimodal power systems having performance significantly higher than that achievable by the state-of-the-art technology. The paper presents an innovative concept of a cascaded solar bimodal power system with a high temperature Cs-Ba thermionic converter. The paper shows that the use of high temperature Knudsen cesium-barium thermionic converter in a solar bimodal system allows to eliminate thermal insulation sleeve, generate electrical power in the propulsion mode, and precise control thermal state of the solar receiver. In the Cs-Ba thermionic converter an electron instability and high amplitude current oscillations develop. These effects can be used to obtain alternate current power directly in the converter. Possibility and potential advantage of such a generator are discussed.

  12. Rotating electrical machines - Part 22: AC generators for reciprocating internal combustion (RIC) engine driven generating sets

    E-Print Network [OSTI]

    International Electrotechnical Commission. Geneva

    1996-01-01T23:59:59.000Z

    Establishes the principal characteristics of a.c. generators under the control of their voltage regulators when used for reciprocating internal combustion engine driven generating sets. Supplements the requirements given in IEC 60034-1.

  13. E-Print Network 3.0 - ac loss measurement Sample Search Results

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

    Plants 9 Journal of High Speed Networks 13 (2004) 87102 87 An implementation-based comparison of Summary: loss ratio. Using AC-MVE, an algorithm based upon mean and variance...

  14. E-Print Network 3.0 - acs survey ix Sample Search Results

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

    67 Institute for Mathematical Physics A-1090 Wien, Austria Summary: Available via WWW.ESI.AC.AT 12;On Higher Analogs of the de Rham Complex Gabriele Vezzosi Via delle...

  15. E-Print Network 3.0 - ac stark shifts Sample Search Results

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

    in Figure 3A,C, we uncover the unusually broad higher order Stark line... to electrochromic band shifts which have been analyzed in detail elsewhere.9 The 2 Stark spectrum of...

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

    SciTech Connect (OSTI)

    Chandler, K.; Eudy, L.

    2007-03-01T23:59:59.000Z

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

  17. E-Print Network 3.0 - ac transmission technology Sample Search...

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

    Jonathan J. Ryder, Martin R. Miller, Andy White, Robert J. Knell and Michael Boots J. J. Ryder (jon.ryder@uea.ac... , Scotland, EH14 4AS. Many host-parasite models...

  18. Contract No. DE-AC02-09CH11466 CONTRACT CLAUSES

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    Contract No. DE-AC02-09CH11466 Section I M152 I-i PART II SECTION I CONTRACT CLAUSES TABLE THE GOVERNMENT'S INTEREST WHEN SUBCONTRACTING WITH CONTRACT

  19. Docket No. EERE-2012-BT-TP-0046; RIN 1904-AC52 Ex partecommunication...

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

    & Publications Docket No. EERE-2012-BT-TP-0046; RIN 1904-AC52 Docket No. EERE-2012-BT-TP-0046 Ex Parte Communication Ex Parte Memorandum on Set Top Boxes and Network Equipment...

  20. E-Print Network 3.0 - ac computer-assisted oral Sample Search...

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

    computer-assisted oral Search Powered by Explorit Topic List Advanced Search Sample search results for: ac computer-assisted oral Page: << < 1 2 3 4 5 > >> 1 Page 1 of 3 University...

  1. E-Print Network 3.0 - ac underground cable Sample Search Results

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

    i c e s VOICE & DATA Summary: ) The underground cable shall have an aluminium steel polyethylene (ASP) sheath and a core of solid... , transposition and presence of AC voltage. ...

  2. ac 66-1100 kv: Topics by E-print Network

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

    limits. The models are used to estimate the benefits of electricity locational marginal pricing (LMP) that arise from de Gispert, Adri 403 www.eprg.group.cam.ac.uk...

  3. AC 2007-253: ENCOURAGING CREATIVITY IN INTRODUCTORY COMPUTER SCIENCE PROGRAMMING ASSIGNMENTS

    E-Print Network [OSTI]

    VanDeGrift, Tammy

    AC 2007-253: ENCOURAGING CREATIVITY IN INTRODUCTORY COMPUTER SCIENCE PROGRAMMING ASSIGNMENTS Tammy technology, multimedia, software engineering, and CS theory. © American Society for Engineering Education, 2007 #12;Encouraging Creativity in Introductory Computer Science Programming Assignments Abstract

  4. E-Print Network 3.0 - ac electro-osmotic pumps Sample Search...

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

    Ben... September 2006 DOI: 10.1039b608092h AC electro-osmotic (ACEO) pumps in microfluidics currently involve... coatings on the raised and lowered surfaces). However, linear...

  5. www.arts.canterbury.ac.nz/internships Project Title: Campaign Assistant: FLUXX: Ideas in

    E-Print Network [OSTI]

    Hickman, Mark

    and supplier research using the internet and phone, client communication, picking up event equipment(s) for the academic adviser #12;www.arts.canterbury.ac.nz/internships Necessary Qualifications: Major/Minors(s): Coms

  6. E-Print Network 3.0 - ac power source Sample Search Results

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

    LEE... , Seoul National University, Seoul, Korea E-mail: jclee9@snu.ac.kr New power combining technique which... in the desired mode without spurious oscillation at other...

  7. acs_JZ_jz-2011-01312e 1..6

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

    jz201312e | J. Phys. Chem. Lett. 2011, 2, 2859-2864 LETTER pubs.acs.orgJPCL Supercapacitor Capacitance Exhibits Oscillatory Behavior as a Function of Nanopore Size Guang...

  8. On-Orbit Performance of the ACS Solar Blind Channel Hien D. Trana

    E-Print Network [OSTI]

    Johns Hopkins University, Department of Physics and Astonomy, Advanced Camera for Surveys Team

    MAMA detector, the ACS/SBC has bright-object limits to protect it from radiation damage. For non the whole detector) limit is optical performance of the SBC is comparable

  9. Ultrafast High-pressure AC Electro-osmotic Pumps for Portable Biomedical Microfluidics

    E-Print Network [OSTI]

    Huang, Chien-Chih

    This paper details the development of an integrated AC electro-osmotic (ACEO) microfluidic pump for dilute electrolytes consisting of a long serpentine microchannel lined with three dimensional (3D) stepped electrode arrays. ...

  10. E-Print Network 3.0 - ac transit fuel Sample Search Results

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

    Sample search results for: ac transit fuel Page: << < 1 2 3 4 5 > >> 1 Hydrogen and Fuel Cell Vehicle Evaluation Richard Parish, Leslie Eudy, and Ken Proc Summary: and the...

  11. Contract Number: DE-AC05-76RL01830 Modification M881

    E-Print Network [OSTI]

    Contract Number: DE-AC05-76RL01830 Modification M881 Part I ­ The Schedule Section F Deliveries) Alternate I (Apr 1984) 1 F ­ 3 Deliverables 2 F ­ i #12;Contract Number: DE-AC05-76RL01830 Modification M881 F ­ 1 Period of Performance This Contract shall be effective as specified in Block No. 3 ­ Effective

  12. Contract No. DE-AC02-09CH11466 DELIVERIES OR PERFORMANCE

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    Contract No. DE-AC02-09CH11466 Section F M137 i PART I SECTION F DELIVERIES OR PERFORMANCE TABLE - STOP WORK AND SHUTDOWN AUTHORITY F-5 F.5 - PRINCIPAL PLACE OF PERFORMANCE F-5 #12;Contract No. DE-AC02 [M041 ­ 7/13/10; M137 ­ 10/28/13] (a) The effective performance date of this contract shall begin

  13. Contract Number: DE-AC05-76RL01830 Modification M881

    E-Print Network [OSTI]

    Contract Number: DE-AC05-76RL01830 Modification M881 B-i Part I ­ The Schedule Section B Supplies.......................................................1 #12;Contract Number: DE-AC05-76RL01830 Modification M881 B-1 B­1 Designation of Work in this Contract and as designated in writing from time to time by DOE, including the utilization of information

  14. Contract Number: DE-AC05-76RL01830 Modification A508

    E-Print Network [OSTI]

    Contract Number: DE-AC05-76RL01830 Modification A508 E-1 Part I ­ The Schedule Section E Inspection) .........................................................................1 E ­ i #12;Contract Number: DE-AC05-76RL01830 Modification A508 E-1 E ­ 1 52.246-9 Inspection the work performed or being performed under the Contract, and the premises where the work is being

  15. High-Power Converters and AC Drives IEEE PESC2005 Tutorial

    E-Print Network [OSTI]

    Wu, Bin

    @ee.ryerson.ca http://www.ee.ryerson.ca/~bwu/ 2 High-Power Converters and AC Drives 1. Introduction 2. Cascaded H-Bridge Drives ∑ High-Power Semiconductor Devices High-Power Converters and AC Drives Bin Wu 4High ∑ Multilevel Voltage Source Inverters N dC Cascaded H-bridge (CHB) Inverter dC Two Level Inverter dC Flying

  16. @BristolUniLib bristol.ac.uk/library Remote (off-site) access

    E-Print Network [OSTI]

    Bristol, University of

    Library @BristolUniLib bristol.ac.uk/library Remote (off-site) access As a member of the University network you may use one of the following options to gain network access from off-site: Remote Desktop.bristol.ac.uk/it-services/ advice/homeusers/remote/studentdesktop. Off-site Proxy The off-site proxy allows use of University web

  17. www.ccfe.ac.uk CPS13.486 (August 2013)

    E-Print Network [OSTI]

    www.ccfe.ac.uk CPS13.486 (August 2013) InFusion Issue 04 | Summer 2013 The work at CCFE is funded by the RCUK Energy Programme and EURATOM Issue 04 |Summer 2013 www.ccfe.ac.uk InFusion CCFE Show and Tell visit to site power supplies Changing times for MAST #12;InFusion Issue 04 | Summer 2013 In this issue

  18. Ratchet Effect and Nonlinear Transport for Particles on Random Substrates with Crossed ac Drives

    E-Print Network [OSTI]

    C. Reichhardt; C. J. Olson Reichhardt

    2005-09-13T23:59:59.000Z

    We show in simulations that overdamped interacting particles in two dimensions with a randomly disordered substrate can exhibit novel nonequilibrium transport phenomena including a transverse ratchet effect, where a combined dc drive and circular ac drive produce a drift velocity in the direction transverse to the applied dc drive. The random disorder does not break any global symmetry; however, in two dimensions, symmetry breaking occurs due to the chirality of the circular drive. In addition to inducing the transverse ratchet effect, increasing the ac amplitude also strongly affects the longitudinal velocity response and can produce what we term an overshoot effect where the longitudinal dc velocity is higher in the presence of the ac drive than it would be for a dc drive alone. We also find a dynamical reordering transition upon increasing the ac amplitude. In the absence of a dc drive, it is possible to obtain a ratchet effect when the combined ac drives produce particle orbits that break a reflection symmetry. In this case, as the ac amplitude increases, current reversals can occur. These effects may be observable for vortices in type II superconductors as well as for colloids interacting with random substrates.

  19. Exam revision Database Systems Lecture 18

    E-Print Network [OSTI]

    Alechina, Natasha

    revision Example (coursework 5) · {Film} {Certificate} is a non-trivial functional dependency · {Cinema(A,B,C), candidate keys (A,B) and (A,C), fd B C. #12;Exam revision Example (coursework 5) · Relation ListingExam revision Database Systems Lecture 18 Natasha Alechina #12;Exam revision In This Lecture · Exam

  20. Exam revision Database Systems Lecture 18

    E-Print Network [OSTI]

    Alechina, Natasha

    ,B) and (A,C), fd B C. #12;3 Exam revision Example (coursework 5) · Relation Listing is not in 2NF because1 Exam revision Database Systems Lecture 18 Natasha Alechina Exam revision In This Lecture · Exam format · Main topics · How to revise Exam revision Exam format · Answer three questions out of five

  1. Commutation failures in HVDC transmission systems

    SciTech Connect (OSTI)

    Thio, C.V.; Davies, J.B.; Kent, K.L. [Manitoba Hydro, Winnipeg, Manitoba (Canada)] [Manitoba Hydro, Winnipeg, Manitoba (Canada)

    1996-04-01T23:59:59.000Z

    This paper provides a formulation for the initiation or onset mechanism of commutation failures in line-commutated thyristor converters, assuming infinite (zero impedance) ac systems. A theoretical development and a parametric analysis is given. Theory validation by simulation and comparison to actual field experience data is also given.

  2. Reference Modeling for Inter-organizational Systems

    E-Print Network [OSTI]

    to gain efficiency in the modeling process and a higher quality of inter-organizational solutions. 1Reference Modeling for Inter-organizational Systems Dieter Mayrhofer Institute of Software@big.tuwien.ac.at Abstract. Inter-organizational business process models are created and used by different partner networks

  3. Methods for comparative assessment of active and passive safety systems with respect to reliability, uncertainty, economy, and flexibility

    E-Print Network [OSTI]

    Oh, Jiyong

    2008-01-01T23:59:59.000Z

    Passive cooling systems sometimes use natural circulation, and they are not dependent on emergency AC power or offsite power, which can make designs simpler through the reduction of emergency power supplying infrastructure. ...

  4. Smart Operations of Air-Conditioning and Lighting Systems in a Government Buildings for Peak Power Reduction

    E-Print Network [OSTI]

    Al-Hadban, Y.; Maheshwari, G. P.; Al-Nakib, D.; Al-Mulla, A.; Alasseri, R.

    2010-01-01T23:59:59.000Z

    This paper presents the achievements of implementing smart operations strategies for air-conditioning (A/C) and lighting systems in Justice Palace Complex (JPC), Kuwait during the summer 2007. The peak load of this building was 3700 k...

  5. SAsSy --Scrutable Autonomous Systems Nava Tintarev, Roman Kutlak, Nir Oren, Kees Van Deemter

    E-Print Network [OSTI]

    van Deemter, Kees

    SAsSy -- Scrutable Autonomous Systems Nava Tintarev, Roman Kutlak, Nir Oren, Kees Van Deemter Matt.tintarev@abdn.ac.uk Abstract. An autonomous system consists of physical or virtual systems that can perform tasks without continuous human guidance. Autonomous systems are becoming increasingly ubiquitous, rang- ing from unmanned

  6. Low Cost Fabrication of 2G Wires for AC Applications

    SciTech Connect (OSTI)

    Kodenkandath, T.; List, F.A., III

    2005-09-15T23:59:59.000Z

    Ink-jet printing has been demonstrated as an adaptable technology for printing YBCO filaments using a Metal Organic (MO) YBCO precursor. The technology was demonstrated using AMSC's proprietary metal organic TFA-based YBCO precursor and a commercial piezoelectric print-head on RABiTS templates. Filaments with a width of 100 um and spacing of 200 um were successfully printed, decomposed and processed to YBCO. Critical currents of {approx} 200 A/cm-w were achieved in a series of filaments with a 2 mm width. The single nozzle laboratory printer used in the Phase 1 program is capable of printing {approx} 100 um wide single filaments at a rate of 8-10 cm/sec. The electrical stabilization of filaments with a Ag ink was also evaluated using ink-jet printing. The overall objective of the Phase 1 Project was the evaluation and demonstration of inkjet-printing for depositing YBCO filaments on textured templates (RABiTS, IBAD, ISD, etc. substrates) with properties appropriate for low loss ac conductors. Goals of the Phase 1 program included development of an appropriate precursor ink, demonstration of the printing process, processing and characterization of printed YBCO filaments and evaluation of the process for further development.

  7. Magnetostrictive materials and method for improving AC characteristics in same

    DOE Patents [OSTI]

    Pulvirenti, Patricia P. (Chicago, IL); Jiles, David C. (Ames, IA)

    2001-08-14T23:59:59.000Z

    The present invention provides Terfenol-D alloys ("doped" Terfenol) having optimized performances under the condition of time-dependent magnetic fields. In one embodiment, performance is optimized by lowering the conductivity of Terfenol, thereby improving the frequency response. This can be achieved through addition of Group III or IV elements, such as Si and Al. Addition of these types of elements provides scattering sites for conduction electrons, thereby increasing resistivity by 125% which leads to an average increase in penetration depth of 80% at 1 kHz and an increase in energy conversion efficiency of 55%. The permeability of doped Terfenol remains constant over a wider frequency range as compared with undoped Terfenol. These results demonstrate that adding impurities, such as Si and Al, are effective in improving the ac characteristics of Terfenol. A magnetoelastic Gruneisen parameter, .gamma..sub.me, has also been derived from the thermodynamic equations of state, and provides another means by which to characterize the coupling efficiency in magnetostrictive materials on a more fundamental basis.

  8. American Institute of Aeronautics and Astronautics A Turbomachinery Gridding System

    E-Print Network [OSTI]

    Cincinnati, University of

    American Institute of Aeronautics and Astronautics 1 A Turbomachinery Gridding System Michael AC, Springfield, OH, 45504 and Mark G. Turner§ University of Cincinnati, Cincinnati, OH, 45219 A Turbomachinery turbomachinery simulations. There are several unique aspects of this gridding system: 1.) it starts

  9. Exploiting Redundancy to Conserve Energy in Storage Systems

    E-Print Network [OSTI]

    Bianchini, Ricardo

    Exploiting Redundancy to Conserve Energy in Storage Systems Eduardo Pinheiro Rutgers University redundancy configura- tion for new energy-aware storage systems. To study Diverted Ac- cesses for realistic, and wide-area storage utilities, con- sume significant amounts of energy. For example, one report indi

  10. Sediment management in sustainable urban drainage system ponds

    E-Print Network [OSTI]

    Heal, Kate

    Sediment management in sustainable urban drainage system ponds K.V. Heal*, D.A. Hepburn** and R.lunn@strath.ac.uk) Abstract Since removal and disposal of sustainable urban drainage system (SUDS) sediment can incur high maintenance costs, assessments of sediment volumes, quality and frequency of removal are required. Sediment

  11. Superconducting magnetic energy storage for asynchronous electrical systems

    DOE Patents [OSTI]

    Boenig, H.J.

    1984-05-16T23:59:59.000Z

    It is an object of the present invention to provide superconducting magnetic energy storage for a plurality of asynchronous electrical systems. It is a further object of the present invention to provide load leveling and stability improvement in a plurality of independent ac systems using a single superconducting magnetic energy storage coil.

  12. Inventory management with dynamic Bayesian network software systems

    E-Print Network [OSTI]

    Barker, Jon

    Inventory management with dynamic Bayesian network software systems Mark Taylor1 and Charles Fox2 1.fox@sheffield.ac.uk Abstract. Inventory management at a single or multiple levels of a supply chain is usually performed-the-shelf graphical software systems. We show how such sys- tems may be deployed to model a simple inventory problem

  13. STABILITY OF PRODUCTION-INVENTORY CONTROL SYSTEMS CONSIDERING INVENTORY SHORTAGES

    E-Print Network [OSTI]

    Venkateswaran, Jayendran

    STABILITY OF PRODUCTION-INVENTORY CONTROL SYSTEMS CONSIDERING INVENTORY SHORTAGES Jayendran@iitb.ac.in) Extended Abstract The modelling and analysis of the production-inventory control systems of manufacturing in inventory levels, production releases, stock-outs; and ultimately affecting the profit of the firm

  14. Operated by the Association of Universities for Research in Astronomy, Inc., for the National Aeronautics and Space Administration Instrument Science Report ACS 2005-06

    E-Print Network [OSTI]

    Sirianni, Marco

    Aeronautics and Space Administration Instrument Science Report ACS 2005-06 Demonstration of a Significant examples where major scien- #12;Instrument Science Report ACS 2005-06 2 tific discoveries have only been

  15. Quantum recurrence and fractional dynamic localization in ac-driven perfect state transfer Hamiltonians

    SciTech Connect (OSTI)

    Longhi, Stefano, E-mail: stefano.longhi@fisi.polimi.it

    2014-06-15T23:59:59.000Z

    Quantum recurrence and dynamic localization are investigated in a class of ac-driven tight-binding Hamiltonians, the Krawtchouk quantum chain, which in the undriven case provides a paradigmatic Hamiltonian model that realizes perfect quantum state transfer and mirror inversion. The equivalence between the ac-driven single-particle Krawtchouk Hamiltonian H{sup -hat} (t) and the non-interacting ac-driven bosonic junction Hamiltonian enables to determine in a closed form the quasi energy spectrum of H{sup -hat} (t) and the conditions for exact wave packet reconstruction (dynamic localization). In particular, we show that quantum recurrence, which is predicted by the general quantum recurrence theorem, is exact for the Krawtchouk quantum chain in a dense range of the driving amplitude. Exact quantum recurrence provides perfect wave packet reconstruction at a frequency which is fractional than the driving frequency, a phenomenon that can be referred to as fractional dynamic localization.

  16. The ACS LCID Project: Variable Stars in Tucana and LGS3

    E-Print Network [OSTI]

    Edouard J. Bernard

    2007-05-18T23:59:59.000Z

    We present preliminary results concerning the search for short-period variable stars in Tucana and LGS3 based on very deep HST/ACS imaging. In the one chip per galaxy we studied so far, a total of 230 and 80 candidates variables were found, respectively. For Tucana, we identified 134 of them as RR Lyrae stars (RRL) pulsating in the fundamental mode (RRab), 51 in the first-overtone mode (RRc), and 37 in both modes simultaneoulsy (RRd), as well as four candidate anomalous Cepheids (AC). In the case of LGS3, we found 45 RRab and 5 RRc, plus three candidates RRd and five candidate AC. The metallicities obtained from the mean period of the RRab are [Fe/H]_{Tuc}=-1.7 and [Fe/H]_{LGS3}=-1.8.

  17. Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01830

    E-Print Network [OSTI]

    PNNL-19945 Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01830 Soil Water Saunders D Felmy October 2010 #12;#12;PNNL-19945 Soil Water Balance and Recharge Monitoring at the Hanford.S. Department of Energy under Contract DE-AC05-76RL01830 Pacific Northwest National Laboratory Richland

  18. Electrospray mass spectrometry of NeuAc oligomers associated with the C fragment of the tetanus toxin

    SciTech Connect (OSTI)

    Prieto, M C; Whittal, R M; Baldwin, M A; Burlingame, A L; Balhorn, R

    2005-04-03T23:59:59.000Z

    The Clostridial neurotoxins, botulinum and tetanus, gain entry into neuronal cells by protein recognition involving cell specific binding sites. The sialic or N-acetylneuraminic acid (NeuAc) residues of gangliosides attached to the surface of motor neurons are the suspected recognition and interaction points with Clostridial neurotoxins, although not necessarily the only ones. We have used electrospray ionization mass spectrometry (ESIMS) to examine formation of complexes between the tetanus toxin C fragment, or targeting domain, and carbohydrates containing NeuAc groups to determine how NeuAc residues contribute to ganglioside binding. ESI-MS was used to rapidly and efficiently measure dissociation constants for a number of related NeuAc-containing carbohydrates and NeuAc oligomers, information that has helped identify the structural features of gangliosides that determine their binding to tetanus toxin. The strength of the interactions between the C fragment and (NeuAc){sub n}, are consistent with the topography of the targeting domain of tetanus toxin and the nature of its carbohydrate binding sites. The results suggest that the targeting domain of tetanus toxin contains two binding sites that can accommodate NeuAc (or a dimer). This study also shows that NeuAc must play an important role in ganglioside binding and molecular recognition, a process critical for normal cell function and one frequently exploited by toxins, bacteria and viruses to facilitate their entrance into cells.

  19. Design, Implementation and Evaluation of a Configurable NoC for AcENoCs FPGA Accelerated Emulation Platform

    E-Print Network [OSTI]

    Lotlikar, Swapnil Subhash

    2011-10-21T23:59:59.000Z

    -Mesh or 2D-Torus topology. The NoC is integrated in the AcENoCs platform and prototyped on Xilinx Virtex-5 FPGA. The NoC was evaluated under various synthetic and realistic workloads generated by AcENoCs' traffic generators implemented on the Xilinx Micro...

  20. ACS Div of Fuel Chem Preprints 44:4, 1016-1019 (August, 1999) KINETICS OF HIGH PRESSURE CHAR OXIDATION

    E-Print Network [OSTI]

    Fletcher, Thomas H.

    ACS Div of Fuel Chem Preprints 44:4, 1016-1019 (August, 1999) KINETICS OF HIGH PRESSURE CHAR) by devolatilizing Pittsburgh #8 coal at #12;ACS Div of Fuel Chem Preprints 44:4, 1016-1019 (August, 1999) high

  1. Beam Sampling for the Infinite Hidden Markov Model Jurgen Van Gael jv279@cam.ac.uk

    E-Print Network [OSTI]

    Ghahramani, Zoubin

    267@cam.ac.uk Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, UK Yee Whye Teh Zoubin Ghahramani zoubin@eng.cam.ac.uk Department of Engineering, University of Cambridge, Cambridge CB2 models (Es- cobar & West, 1995; Rasmussen, 2000) for cluster- ing heterogeneous data and density

  2. Subscriber access provided by BOSTON UNIV ACS Nano is published by the American Chemical Society. 1155 Sixteenth Street

    E-Print Network [OSTI]

    Subscriber access provided by BOSTON UNIV ACS Nano is published by the American Chemical Society Alivisatos ACS Nano, 2008, 2 (7), 1452-1458· DOI: 10.1021/nn800270m · Publication Date (Web): 22 July 2008 at Berkeley, Berkeley, California 94720 S ince the first report in 2004,1 the for- mation of hollow

  3. Theoretical prediction of fast 3D AC electro-osmotic pumps Martin Z. Bazant* and Yuxing Ben

    E-Print Network [OSTI]

    Bazant, Martin Z.

    Theoretical prediction of fast 3D AC electro-osmotic pumps Martin Z. Bazant* and Yuxing Ben September 2006 DOI: 10.1039/b608092h AC electro-osmotic (ACEO) pumps in microfluidics currently involve. In this paper, we present some new design principles for periodic 3D ACEO pumps, such as the ``fluid conveyor

  4. Aberdeen University Counselling Service Created 19.04.06 www.abdn.ac.uk/counselling Updated 30.08.11

    E-Print Network [OSTI]

    Guerin, Frank

    Aberdeen University Counselling Service Created 19.04.06 www.abdn.ac.uk/counselling Updated 30 or eliminating them completely? #12;Aberdeen University Counselling Service Created 19.04.06 www.abdn.ac.uk/counselling premises) · Can you devote the time and energy necessary to m

  5. Aberdeen University Counselling Service Created 20.04.06 www.abdn.ac.uk/counselling Updated 30.08.11

    E-Print Network [OSTI]

    Guerin, Frank

    Aberdeen University Counselling Service Created 20.04.06 www.abdn.ac.uk/counselling Updated 30 of success. #12;Aberdeen University Counselling Service Created 20.04.06 www.abdn.ac.uk/counselling for the evening. Take advantage of times when your energy levels are at their highest and do your most demanding

  6. Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01830

    E-Print Network [OSTI]

    PNNL-20162 Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01830 Cultural February 2011 Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01830 Pacific Northwest is required. · Please be sure that any PDF submitted to DAHP has its cover sheet, figures, graphics

  7. MSc Dissertation (NURM112) -Student Enrolment form Full Time Students Module Leader: Ms Mary Kelly (mary.kelly@surrey.ac.uk)

    E-Print Network [OSTI]

    Doran, Simon J.

    Kelly (mary.kelly@surrey.ac.uk) 1. Programme Registration Year 2. Full Name 3. University Registration

  8. MSc Dissertation (NURM112) -Student Enrolment form Part Time Students Module Leader: Ms Mary Kelly (mary.kelly@surrey.ac.uk)

    E-Print Network [OSTI]

    Doran, Simon J.

    Kelly (mary.kelly@surrey.ac.uk) 1. Programme Registration Year 2. Full Name 3. University Registration

  9. Subscriber access provided by -Access paid by the | UC Davis Libraries ACS Chemical Biology is published by the American Chemical Society. 1155 Sixteenth

    E-Print Network [OSTI]

    Beal, Peter A.

    A. Beal ACS Chem. Biol., Just Accepted Manuscript · DOI: 10.1021/cb300692k · Publication Date (Web

  10. Key to images: [1] Model system: fission yeast [2] Cryo-EM structure

    E-Print Network [OSTI]

    Brierley, Andrew

    Key to images: [1] Model system: fission yeast [2] Cryo-EM structure of the MCM helicase [3 combing [8] Model system: Xenopus [9] Extreme environments [10] Model system: C.elegans. Background image of the evolution of the replication machinery highlighted. BSRC B306 Email: sam31@st-and.ac.uk 1 2 3 4 5 6 7 8 9 10

  11. DISTRIBUTED SYSTEMS MANAGEMENT AS A GROUP ACTIVITY Graham Dean, Tom Rodden, Ian Sommerville and David Hutchison

    E-Print Network [OSTI]

    Sommerville, Ian

    DISTRIBUTED SYSTEMS MANAGEMENT AS A GROUP ACTIVITY Graham Dean, Tom Rodden, Ian Sommerville@comp.lancs.ac.uk It is important to consider systems management as part of a whole organisational management strategy and, as such within the terms of reference associated with systems management. INTRODUCTION Traditionally, network

  12. A Supply-Demand Model Based Scalable Energy Management System for Improved Energy

    E-Print Network [OSTI]

    Bhunia, Swarup

    the dependency of an electronic system to primary energy sources (i.e. AC power or battery). For reliable energy generation and consumption parameters. The system uses economics inspired supply-demand modelA Supply-Demand Model Based Scalable Energy Management System for Improved Energy Utilization

  13. Systems and methods for creation of conducting networks of magnetic particles through dynamic self-assembly process

    DOE Patents [OSTI]

    Snezhko, Oleksiy (Woodridge, IL); Aronson, Igor (Darien, IL); Kwok, Wai-Kwong (Downers Grove, IL)

    2011-01-25T23:59:59.000Z

    Self-assembly of magnetic microparticles in AC magnetic fields. Excitation of the system by an AC magnetic field provides a variety of patterns that can be controlled by adjusting the frequency and the amplitude of the field. At low particle densities the low-frequency magnetic excitation favors cluster phase formation, while high frequency excitation favors chains and netlike structures. For denser configurations, an abrupt transition to the network phase was obtained.

  14. Demodulation circuit for AC motor current spectral analysis

    DOE Patents [OSTI]

    Hendrix, Donald E. (Oak Ridge, TN); Smith, Stephen F. (Knoxville, TN)

    1990-12-18T23:59:59.000Z

    A motor current analysis method for the remote, noninvasive inspection of electric motor-operated systems. Synchronous amplitude demodulation and phase demodulation circuits are used singly and in combination along with a frequency analyzer to produce improved spectral analysis of load-induced frequencies present in the electric current flowing in a motor-driven system.

  15. Contract Number: DE-AC05-76RL01830 Modification M962

    E-Print Network [OSTI]

    MANAGEMENT MANUAL CRD O 440.2C, Chg. 1 AVIATION MANAGEMENT AND SAFETY CRD M 441.1-1 NUCLEAR MATERIAL and Other Attachments Section J Appendix D List of Applicable DOE Directives & External Requirements J-D-i #12;Contract Number: DE-AC05-76RL01830 Modification M962 SECTION J APPENDIX D LIST OF APPLICABLE DOE

  16. Mnoa Green Days Checklist for Buildings Being Closed Due to AC Shutdown

    E-Print Network [OSTI]

    Wang, Yuqing

    Mnoa Green Days Checklist for Buildings Being Closed Due to AC Shutdown The following Mnoa Green Days in which air conditioning to participating buildings will be shutdown over the weekends is a checklist for building occupants to use as a reference to successfully conserve energy during the Expanded

  17. The AC Stark E#ect, Time--Dependent Born--Oppenheimer Approximation, and

    E-Print Network [OSTI]

    Rousse, Vidian

    The AC Stark E#ect, Time--Dependent Born--Oppenheimer Approximation, and Franck--Condon Factors by a classical oscillatory electric field, and we employ the Born--Oppenheimer approximation for the molecule. We-- Condon factors that we compute explicitly to leading order in the Born--Oppenheimer parameter. We also

  18. The AC Stark E ect, Time{Dependent Born{Oppenheimer Approximation, and

    E-Print Network [OSTI]

    Hagedorn, George A.

    The AC Stark E#11;ect, Time{Dependent Born{Oppenheimer Approximation, and Franck{Condon Factors the laser pulse by a classical oscillatory electric #12;eld, and we employ the Born{Oppenheimer. These amplitudes contain Franck{ Condon factors that we compute explicitly to leading order in the Born{Oppenheimer

  19. Inhomogeneous soliton ratchets under two ac forces Luis Morales-Molina

    E-Print Network [OSTI]

    SŠnchez, Angel "Anxo"

    Inhomogeneous soliton ratchets under two ac forces Luis Morales-Molina Max-Planck Institut fŁr; published 10 April 2006 We extend our previous work on soliton ratchet devices L. Morales-Molina et al., Eur, as proposed for particle ratchets by Savele'v et al. Europhys. Lett. 67, 179 2004 ; Phys. Rev. E 70, 066109

  20. Library Information Literacy Section literacy@lib.kobe-u.ac.jp

    E-Print Network [OSTI]

    Banbara, Mutsunori

    library (P. 4) Available in Kobe University libraries Search the Kobe University online catalog OPAC Kobe. Online Public Access Catalog (OPAC) http://lib.kobe-u.ac.jp/www/modules/eng/ New books list and other Univ. Library 3. How to read the search result of OPAC Bibliographic information What does the call

  1. Lurching towards markets for power: China's electricity policy 19852007 Xiaoli Zhao a,c,

    E-Print Network [OSTI]

    Lyon, Thomas P.

    tremendously. Meanwhile, the electricity price reform in 1996 promoted power generation corporations more that the electricity price reform in 2003 (and the dismantle reform at the end of 2002) affect electricity generationLurching towards markets for power: China's electricity policy 1985­2007 Xiaoli Zhao a,c, , Thomas

  2. A Comparison of the AC and DC Power Flow Models for LMP Calculations

    E-Print Network [OSTI]

    A Comparison of the AC and DC Power Flow Models for LMP Calculations Thomas J. Overbye, Xu Cheng power flow model for LMP-based market calculations. The paper first provides a general discussion of balanced, three phase, electric power transmission networks is through the solution of the power flow. From

  3. PHYSICAL REVIEW E 86, 036314 (2012) ac electric fields drive steady flows in flames

    E-Print Network [OSTI]

    Heller, Eric

    PHYSICAL REVIEW E 86, 036314 (2012) ac electric fields drive steady flows in flames Aaron M. Drews June 2012; published 20 September 2012) We show that time-oscillating electric fields applied-averaged force that drives the steady flows observed experimentally. A quantitative model describes the response

  4. www.arts.canterbury.ac.nz/internships Project Title: Health, History and Digital

    E-Print Network [OSTI]

    Hickman, Mark

    project on the history of unfree labour in the Pacific. The intern will link the database to other onlinewww.arts.canterbury.ac.nz/internships Project Title: Health, History and Digital Humanities: The project explores the health history of indentured labourers in Fiji. The intern will digitise microfilm

  5. Finally, the Academy has ac-cepted eleven new members, for a

    E-Print Network [OSTI]

    Finally, the Academy has ac- cepted eleven new members, for a total of 73 members. Please see of educators. If you are not already an Academy member, please consider submitting your application. A review of member- ship categories is on page 2 of this Academy Bulletin. Complete de- tails are on the Academy

  6. LAW enFOrcement AcAdemy College of Rural and Community Development

    E-Print Network [OSTI]

    Hartman, Chris

    LAW enFOrcement AcAdemy College of Rural and Community Development Community and Technical College Requirements for Certification: 16 credits The Law Enforcement Academy prepares students for a career in law en Enforcement Academy is an intense semester of full-time study. Students attend class 40 hours per week for one

  7. PArAmedic AcAdemy College of Rural and Community Development

    E-Print Network [OSTI]

    Hartman, Chris

    PArAmedic AcAdemy College of Rural and Community Development Community and Technical College 907-455-2895 www.ctc.uaf.edu/programs/paramedic/ The paramedic academy prepares students to take the national para Medical Board. The paramedic academy offers the highest level of education avail- able to prepare for work

  8. Contract No. DE-AC02-09CH11466 CONTRACT CLAUSES

    E-Print Network [OSTI]

    Contract No. DE-AC02-09CH11466 Section I M160 I-i PART II SECTION I CONTRACT CLAUSES TABLE/2/13]................................................................ 23 CLAUSE I.16A ­ FAR 52.209-10 PROHIBITION ON CONTRACTING WITH INVERTED DOMESTIC CORPORATIONS (MAY).................................................... 26 CLAUSE I.18 - FAR 52.215-8 ORDER OF PRECEDENCE - UNIFORM CONTRACT FORMAT (OCT 1997) ...............................................

  9. Contract Number: DE-AC05-76RL01830 Modification M962

    E-Print Network [OSTI]

    Contract Number: DE-AC05-76RL01830 Modification M962 PART III ­ List of Documents, Exhibits and Other Attachments Section J Appendix C Subcontracting Plan for Socioeconomic Programs J-C-i #12;Contract, 2002, for the entire Contract period associated with this Contract. However, annual goals shall

  10. Contract No. DE-AC02-09CH11466 CONTRACT CLAUSES

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    Contract No. DE-AC02-09CH11466 Section I M110 I-i PART II SECTION I CONTRACT CLAUSES TABLE) .........................................................................................24 Clause I.18 - Far 52.215-8 Order Of Precedence - Uniform Contract Format (Oct 1997

  11. Contract Number: DE-AC05-76RL01830 Modification M705

    E-Print Network [OSTI]

    Contract Number: DE-AC05-76RL01830 Modification M705 Part III - List of Documents, Exhibits be designated: a. Battelle Memorial Institute, PNW Division -Contract b. Battelle Memorial Institute, PNW Division- Salary c. Battelle Memorial Institute, PNW Division -Controlled Disbursement Contract d. Battelle

  12. Contract No. DE-AC02-09CH11466 SPECIAL CONTRACT REQUIREMENTS

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    Contract No. DE-AC02-09CH11466 Section H M152 H-i PART I SECTION H SPECIAL CONTRACT REQUIREMENTS .................................................................................................. 8 CLAUSE H.11 - SERVICE CONTRACT ACT OF 1965 (41 U.S.C. 351) ....................................................... 9 CLAUSE H.12 - WALSH-HEALY PUBLIC CONTRACTS ACT (OCT 2010) [M069 ­ 6

  13. Contract Number: DE-AC05-76RL01830 Modification M963

    E-Print Network [OSTI]

    Contract Number: DE-AC05-76RL01830 Modification M963 Part II ­ Contract Clauses Section I Contract) .............................................................19 I­13 FAR 52.215-8 Order of Precedence -- Uniform Contract Format (Oct 1997) .................20 I)...........................................................................36 I­21 FAR 52.222-4 Contract Work Hours and Safety Standards Act -- Overtime Compensation (July 2005

  14. Contract No. DE-AC02-09CH11466 SPECIAL CONTRACT REQUIREMENTS

    E-Print Network [OSTI]

    Contract No. DE-AC02-09CH11466 Section H M135 H-i PART I SECTION H SPECIAL CONTRACT REQUIREMENTS .............................................................................................8 CLAUSE H.11 - SERVICE CONTRACT ACT OF 1965 (41 U.S.C. 351).....................................................9 CLAUSE H.12 - WALSH-HEALY PUBLIC CONTRACTS ACT (OCT 2010) [M069 ­ 6/27/11]................10 CLAUSE H.13

  15. Contract Number: DE-AC05-76RL01830 Modification M873

    E-Print Network [OSTI]

    Contract Number: DE-AC05-76RL01830 Modification M873 G-i Part I ­ The Schedule Section G Contract Administration Data Table of Contents G-1 Head of Contracting Activity (HCA), Contracting Officer (CO), and Contracting Officer's Representative (COR) ...................................................... 1 G­2 952

  16. Contract Number: DE-AC05-76RL01830 Modification M412

    E-Print Network [OSTI]

    Contract Number: DE-AC05-76RL01830 Modification M412 PNNL Contract Table of Contents SECTION A: Contract Form SECTION B: Supplies or Services and Prices/Costs B-1: Designation of Work and Facilities B-2: Contract Administration Data G-1: Head of Contracting Activity (HCA), Contracting Officer (CO

  17. www.exeter.ac.uk/inspiring-science Cellulose: sustainable and renewable

    E-Print Network [OSTI]

    Mumby, Peter J.

    www.exeter.ac.uk/inspiring-science Cellulose: sustainable and renewable material for many applications 17 November 2011, 5.45pm Harrison Building, Room 004 InspIrIngScience Professor Stephen Eichhorn Chair of Materials Science College of engineering, MatheMatiCs and PhysiCal sCienCes 2011ceMPS041

  18. 1 Imbedded Heat Pipe Prototype Modelling, Design, and Construction for Particle Ac-

    E-Print Network [OSTI]

    Cinabro, David

    1 Imbedded Heat Pipe Prototype Modelling, Design, and Construction for Particle Ac- celerator for predicting heat pipe performance has been generated and a design based on the results of that model has been implemented. A prototype heat pipe is under construction to test the validity of the model. The prototype

  19. Comparing Web Services with Other Software Components y.yu@open.ac.uk

    E-Print Network [OSTI]

    Lu, Jianguo

    - 1 - Comparing Web Services with Other Software Components Yijun Yu y.yu@open.ac.uk Computing to be developed. As a kind of software components, web service technology has flourished and attracted a flurry of research activities. Despite the vast amount of research on mechanisms of web services, there have been

  20. DE-AC05-00OR22725 Modification No. 341

    E-Print Network [OSTI]

    are universities, DOE National Laboratories, a non-profit research foundation, or industrial research partners. DOE.2 "BESC Funding" means the funding for BESC that was awarded by DOE to ORNL under Contract No. DE-AC02 the inventors will have the right to elect title to BESC Inventions. 2.4 "Core Technology" means the following

  1. A direct AC-to-DC converter topology with high-frequency isolation

    E-Print Network [OSTI]

    Sulistyono, Widodo

    1994-01-01T23:59:59.000Z

    disadvantages of the conventional approach are: it requires relatively large input ac filter components, requires two stages of rectification and of de filtering (i.e., at the front-end and output rectifiers), and exhibit poor overall input power factor...

  2. http://www.essex.ac.uk/chimera/ CHIMERA WORKING PAPER NUMBER: 2005-07

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    http://www.essex.ac.uk/chimera/ CHIMERA WORKING PAPER NUMBER: 2005-07 CWP-2005-07-Lesnard-Social-Change-Fin.doc Social Change, Daily Life and the Internet Chimera Working Paper Number: 2005-07 Dr Laurent Lesnard1 Author's current address: laurent.lesnard@sciences-po.fr #12;CHIMERA WORKING PAPER NUMBER: 2005-07 CWP

  3. Eye-Tracker {eskim, jkim, btzhang} @ bi.snu.ac.kr

    E-Print Network [OSTI]

    Eye-Tracker ,, {eskim, jkim, btzhang} @ bi.snu.ac.kr Eye-Tracking Analysis of Attention . `' . . . Eye-Tracker . Eye-Tracker . . 1. , . `' , . . , . . , . 3 [1]. 1) fMRI, MEG, EEG 2) Eye-Tracker, Motion Tracker embodiment cognition 3

  4. Seoul National University http://bp.snu.ac.kr The Role of Carbon Incorporation in

    E-Print Network [OSTI]

    Park, Byungwoo

    O2 ¬∑ Hydrothermal followed by carbonization at 500¬įC J. Phys. Chem. C 113, 20504 (2009). J. PhysSeoul National University http://bp.snu.ac.kr The Role of Carbon Incorporation in SnO2 of cracks during cycling Sn-Based Oxide Li Metal Carbon-Coated SnO2 #12;Seoul National University http

  5. Cyclic strain hardening of nanocrystalline nickel B. Moser a,b,*, T. Hanlon a,c

    E-Print Network [OSTI]

    Suresh, Subra

    Cyclic strain hardening of nanocrystalline nickel B. Moser a,b,*, T. Hanlon a,c , K.S. Kumar d , S strain hardening and frequency-dependent fatigue life in electrodeposited nanocrystalline Ni subjected. All rights reserved. Keywords: Nanocrystalline materials; Nickel; Low cycle fatigue; Fracture; Cyclic

  6. Two dimensional thermoelectric platforms for thermocapillary droplet Man-Chi Liu,ac

    E-Print Network [OSTI]

    Lin, Pei-Chun

    the cooling function relies on the natural conduction and/or convection. A thermoelectric (TE) chipTwo dimensional thermoelectric platforms for thermocapillary droplet actuation Man-Chi Liu,ac Jin be driven to the cooler regions via surface tension modulation by varying the temperature. The usual method

  7. Design and Implementation of a High-Fidelity AC Metering Network

    E-Print Network [OSTI]

    Dutta, Prabal

    in residential and commercial build- ings represent a significant fraction of total energy ex- penditure and evaluation of ACme, a wireless sensor and actuator net- work for monitoring AC energy usage and controlling different kind of application­ high fidelity, building-wide, electricity monitoring. Electricity usage

  8. http://www.ukro.ac.uk FP7 in 2013 making the most of the

    E-Print Network [OSTI]

    Royal Holloway, University of London

    , University of London 6 November 2012 Inga Benner inga.benner@bbsrc.ac.uk #12;UK Research Office · Based someone to speak to in the European Commission · Project management issues, reporting, audit · Wider (ICT) Nanosciences, Nanotechnologies, Materials and new Production Technologies (NMP) Energy

  9. Planar microresonators for EPR experiments R. Narkowicz a,c,*, D. Suter a

    E-Print Network [OSTI]

    Suter, Dieter

    Planar microresonators for EPR experiments R. Narkowicz a,c,*, D. Suter a , R. Stonies b 2005 Available online 6 June 2005 Abstract EPR resonators on the basis of standing-wave cavities than the wavelength. We discuss the design and evaluation of EPR resonators on the basis of planar

  10. Ac-conductivity and electromagnetic energy absorption for the Anderson model in linear response theory

    E-Print Network [OSTI]

    Abel Klein; Peter MŁller

    2014-03-03T23:59:59.000Z

    We continue our study of the ac-conductivity in linear response theory for the Anderson model using the conductivity measure. We establish further properties of the conductivity measure, including nontriviality at nonzero temperature, the high temperature limit, and asymptotics with respect to the disorder. We also calculate the electromagnetic energy absorption in linear response theory in terms of the conductivity measure.

  11. Chemistry -Bachelor of Science (SCH2UG) Total Credits Required: 128 Chemistry/Biochemistry -ACS Certified

    E-Print Network [OSTI]

    Chemistry - Bachelor of Science (SCH2UG) Total Credits Required: 128 Chemistry/Biochemistry - ACS credits Course Credits Course Credits CH1150 University Chemistry I AND 3 BL1040 Principles of Biology 4 CH1151 University Chemistry Lab 1 AND 1 BL4820 Biochem Techniques I 2 CH1153 University Chemistry

  12. Chemistry -Bachelor of Science (SCH5UG) Total Credits Required: 128 Chemistry/Environmental -ACS Certified

    E-Print Network [OSTI]

    Chemistry - Bachelor of Science (SCH5UG) Total Credits Required: 128 Chemistry/Environmental - ACS credits Course Credits Course Credits CH1150 University Chemistry I AND 3 BL1040 Principles of Biology 4 CH1151 University Chemistry Lab 1 AND 1 BL3310 Environmental Microbiology 3 CH1153 University

  13. Chemistry -Bachelor of Science (SCHUG) Total Credits Required: 128 Chemistry -ACS Certified

    E-Print Network [OSTI]

    Chemistry - Bachelor of Science (SCHUG) Total Credits Required: 128 Chemistry - ACS Certified Major of the following courses Course Credits Course Credits CH1150 University Chemistry I AND 3 CH4110 Pharmaceutical Chemistry: Drug Action 3 CH1151 University Chemistry Lab 1 AND 1 CH4120 Pharmaceutical Chemistry: Drug

  14. Chemistry -Bachelor of Science (SCH1UG) Total Credits Required: 128 Chemistry/Polymers -ACS Certified

    E-Print Network [OSTI]

    Chemistry - Bachelor of Science (SCH1UG) Total Credits Required: 128 Chemistry/Polymers - ACS credits Course Credits Course Credits CH1150 University Chemistry I AND 3 CH4610 Intro to Polymer Science 3 CH1151 University Chemistry Lab 1 AND 1 CH4620 Polymer Chemistry 3 CH1153 University Chemistry

  15. Graphite-to-diamond transformation induced by ultrasound cavitation A.Kh. Khachatryan a,c

    E-Print Network [OSTI]

    Bristol, University of

    Graphite-to-diamond transformation induced by ultrasound cavitation A.Kh. Khachatryan a,c , S microcrystals have been synthesized using ultrasonic cavitation of a suspension of hexagonal graphite in various. © 2008 Elsevier B.V. All rights reserved. Keywords: Ultrasound cavitation; Microcrystalline diamond 1

  16. Nano-diamonds in the Universe A.C. Andersen,1

    E-Print Network [OSTI]

    Andersen, Anja C.

    Nano-diamonds in the Universe A.C. Andersen,1 H. Mutschke,2 L. Binette3 , S. Höfner4 1 NORDITA, SE-75120 Uppsala Sweden The first direct evidence for nano-diamonds in space came from meteorites. Laboratory analyses on fine-grained diamond residues from primitive meteorites have shown that nano- diamonds

  17. IDT54/74FCT574/A/C FASTCMOSOCTALDREGISTER(3-STATE) MILITARYANDCOMMERCIALTEMPERATURERANGES

    E-Print Network [OSTI]

    Berns, Hans-Gerd

    register built using an advanced dualmetalCMOStechnology. TheseregistersconsistofeightOoutputsonthelow-to-hightransitionoftheclockinput. The IDT54/74FCT574/A/C has non-inverting outputs with respect to the data at the D inputs LOW 3-state Output Enable Input FUNCTION TABLE (1) Inputs Outputs Internal Function OE CP DN ON QN Hi

  18. www.phy.cam.ac.uk What is the Physics of

    E-Print Network [OSTI]

    Steiner, Ullrich

    `In 2100, the sources of energy on this planet will be either solar or fusion, and the preferred meanswww.phy.cam.ac.uk Inside... What is the Physics of Sustainability? 2 Peter Littlewood's Parting with the University Registrary Jonathan Nicholls at the award ceremony. The urgency of dealing with energy

  19. AC conductivity of nanoporous metal-oxide photoanodes for solar energy conversion

    E-Print Network [OSTI]

    Konezny, Steven J.

    AC conductivity of nanoporous metal-oxide photoanodes for solar energy conversion Steven J. Konezny% solar-to-electric energy conversion efficiency) exploited the large surface area of nanoporous thin for solar photoconversion is analyzed using a model based on fluctuation-induced tunneling conduction (FITC

  20. AC 2007-2003: UNDERWATER LEGO ROBOTICS: TESTING, EVALUATION & Adam Carberry, Tufts University

    E-Print Network [OSTI]

    AC 2007-2003: UNDERWATER LEGO ROBOTICS: TESTING, EVALUATION & REDESIGN Adam Carberry, Tufts from Tufts. He is also a research assistant at the Tufts University Center for Engineering Educational a difference in bringing engineering to K-12 education. He is also a research assistant at the Tufts University

  1. DE-AC02-76SF00515 Contractor Performance Evaluation and

    E-Print Network [OSTI]

    Wechsler, Risa H.

    #12;#12;DE-AC02-76SF00515 Appendix B M544 FY 2008 Contractor Performance Evaluation and Measurement Plan for Management and Operations ofthe Stanford Linear Accelerator Center 10-03-07 09:58 RCVD J

  2. www.arts.canterbury.ac.nz/internships Project Title: Fracking in Canterbury?

    E-Print Network [OSTI]

    Hickman, Mark

    www.arts.canterbury.ac.nz/internships Project Title: Fracking in Canterbury? Bachelor of Arts: Joanna Goven Project Reference Number: S212/Fracking/22/NP Application Deadline: 2 July NOON Project Description: Fracking is the term given to the hydraulic fracturing of rock to extract natural gas

  3. Function Block Diagrams * {ekjee, jbyoo, suhyun, cha}@dependable.kaist.ac.kr

    E-Print Network [OSTI]

    }@dependable.kaist.ac.kr : FBD(Function Block Diagram) FBD . PLC FBD C . FBD . FBD Center(ITRC). RLL(Relay Ladder Logic) , . PLC(Programmable Logic Controller) [2] , LD(Ladder Diagram) FBD(Function Block Diagram) PLC . PLC . PLC

  4. www.tyndall.ac.uk Shale gas: an updated assessment of

    E-Print Network [OSTI]

    Matthews, Adrian

    , such as oil derived from tar sands. Nevertheless, there are several routes by which shale gas extraction maywww.tyndall.ac.uk Shale gas: an updated assessment of environmental and climate change impacts Summary This report, commissioned by The Co-operative, is an update on our January report, Shale gas

  5. Experiment on TiO2/AC Photocatalysis Technique to Eliminate Toluene in Air Conditioning Systems

    E-Print Network [OSTI]

    Hu, Y.; Feng, G.; Yuan, Q.

    2006-01-01T23:59:59.000Z

    at present, the article proposes that new-type purification technique and hopes to promote the upgrading of the product about purification. 2. INTRODUTION ON THE STRURE AND STUFF OF ACTIVE CARBON AND NANO- TITANIUM DIOXIDE PHOTOCATALYSIS PURIFICATION... WEB What is called active carbon and nano-titanium dioxide photocatalysis technique is to utilize the method of compounding active carbon and nanometer photocatalyst to firstly form absorption layer on supporting body surface by gluing, which...

  6. Equivalent circuits for power system studies on the A-C network calculator

    E-Print Network [OSTI]

    Kolb, Walter Jean

    1948-01-01T23:59:59.000Z

    rela- tions w111 be used. Il + I2 + ~ ~ + In I exci ting current ex joo(L - Mc) jX self leakage reactance of winding n joO(M - M ) jX mutual leakage reactance c mn between w1ndings m and n ju Mc Iex Ec 39 Substituting those values... - V2 ~ Il [Ri + J (X - X12)] I2 [R2 + J (X22 - X21)] ' l. ' J 'n '"ln X2 'j V ? V~ Zg [R~ + J (X~~ Xg )) - I. [Rn ~ J (W - Xn2)j + [J Il (X21 - +) + . ] (14) V -Vl-I la n 1 n L The exciting current is J (X - Xnl)j Il [Rl + J (Xll - Xl )] f...

  7. Investigation of Voltage and Current Variations in a Multiphase AC Electric Arc System

    E-Print Network [OSTI]

    Boyer, Edmond

    of the most promising directions. The method of plasma pyrolysis and gasification, where at waste processing in the plasma torch up to high temperatures, as an oxidative agent at incineration of low-calorie waste products an excess-air coefficient, reduces total amount of secondary gaseous waste generated at incineration

  8. A Partitioning Approach for Parallel Simulation of AC-Radial Shipboard Power Systems

    E-Print Network [OSTI]

    Uriarte, Fabian Marcel

    2011-08-08T23:59:59.000Z

    . Dommel and J. R. Marti (University of British Columbia), K. Strunz (University of Washington), N. Watson (University of Canterbury), and T. Noda (Doshisha University). I would like to thank the aforementioned authors for the level of detail presented... OF TABLES ........................................................................................................... xv CHAPTER I INTRODUCTION ......................................................................................... 1 1.1 Introduction...

  9. 1. PMU Based RAS for a Hybrid AC/DC System 1.1. Project Team

    E-Print Network [OSTI]

    Li, Husheng

    to minimize the impact of disturbances. It is also an integration of various areas related to CPS these wide area protection schemes. Such schemes are essential to the strategic plan in enabling robustness

  10. AC 2012-3792: SYSTEMIC INTERVENTION: CONNECTING FORMAL AND INFORMAL EDUCATION EXPERIENCES FOR ENGAGING FE-

    E-Print Network [OSTI]

    Merredith Portsmore is a Research Assistant Professor in education at Tufts University, as well for their classroom, ranging from LEGO Robotics to Service Learning projects, which they felt would engage all

  11. AVTA Voltec AC Level 1 and Level 2 Charging Systems Testing Results |

    Energy Savers [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 Delicious RankCombustionImprovement3 Beryllium-Associated6-05.pdfATTENDEEES: Ashley Armstrong, DOEUpDepartment of

  12. AVTA: Blink AC Level 2 Charging System Testing Results | Department of

    Energy Savers [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 Delicious RankCombustionImprovement3 Beryllium-Associated6-05.pdfATTENDEEES: Ashley Armstrong,

  13. AVTA: ChargePoint AC Level 2 Charging System Testing Results | Department

    Energy Savers [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 Delicious RankCombustionImprovement3 Beryllium-Associated6-05.pdfATTENDEEES: Ashley Armstrong,of Energy ChargePoint

  14. AVTA: Clipper Creek AC Level 2 Charging System Testing Results | Department

    Energy Savers [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 Delicious RankCombustionImprovement3 Beryllium-Associated6-05.pdfATTENDEEES: Ashley Armstrong,of Energy

  15. AVTA: Eaton AC Level 2 Charging System Testing Results | Department of

    Energy Savers [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 Delicious RankCombustionImprovement3 Beryllium-Associated6-05.pdfATTENDEEES: Ashley Armstrong,of

  16. AVTA: GE Energy WattStation AC Level 2 Charging System Testing Results |

    Energy Savers [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 Delicious RankCombustionImprovement3 Beryllium-Associated6-05.pdfATTENDEEES: Ashley Armstrong,ofDepartment of

  17. AVTA: Leviton AC Level 2 Charging System Testing Results | Department of

    Energy Savers [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 Delicious RankCombustionImprovement3 Beryllium-Associated6-05.pdfATTENDEEES: Ashley Armstrong,ofDepartmentResults

  18. AVTA: SPX AC Level 2 Charging System Testing Results | Department of Energy

    Energy Savers [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 Delicious RankCombustionImprovement3 Beryllium-Associated6-05.pdfATTENDEEES: AshleyEnergy PLUGLESS Level 2

  19. AVTA: Schneider AC Level 2 Charging System Testing Results | Department of

    Energy Savers [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 Delicious RankCombustionImprovement3 Beryllium-Associated6-05.pdfATTENDEEES: AshleyEnergy PLUGLESS Level

  20. AVTA: Siemens-VersiCharge AC Level 2 Charging System Testing Results |

    Energy Savers [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 Delicious RankCombustionImprovement3 Beryllium-Associated6-05.pdfATTENDEEES: AshleyEnergy PLUGLESS LevelDepartment

  1. EC417: Electric Energy Systems: Adapting to Renewable Resources Description: This course will present a detailed perspective of electric power systems

    E-Print Network [OSTI]

    EC417: Electric Energy Systems: Adapting to Renewable Resources Description: This course such as photovoltaics and wind. Conventional approaches will be presented with emphasis to future technology Circuits (EK307) Course Topics: 1. Brief History of Power Systems (the great AC-DC battle) 2. Basic

  2. High Availability for the Lustre File System A Dissertation

    E-Print Network [OSTI]

    Engelmann, Christian

    Of The Requirements For The Degree Of MASTER OF SCIENCE In NETWORK CENTERED COMPUTING, HIGH PERFORMANCE COMPUTING Contract No. DE-AC05-00OR22725. #12;#12;Abstract With the growing importance of high performance computing and, more importantly, the fast growing size of sophisticated high performance computing systems

  3. ECE 466: LED Lighting Systems -Incandescent lightings rise and

    E-Print Network [OSTI]

    Schumacher, Russ

    versus cost - Power Electronic Drives for CFL and LED light sources to achieve dimmable operation - Basic electric AC and DC circuits at Sophomore level or equivalents Absolutes Lighting System Requirements index as a metric of a light source - Power Electronic Energy sources driving light sources in a compact

  4. Flow monitoring and control system for injection wells

    DOE Patents [OSTI]

    Corey, J.C.

    1991-01-01T23:59:59.000Z

    The present invention relates to a system for monitoring and controlling the rate of fluid flow from an injection well used for in-situ remediation of contaminated groundwater. The United States Government has rights in this invention pursuant to Contract No. DE-AC09-89SR18035 between the US Department of Energy and Westinghouse Savannah River Company.

  5. In-situ remediation system for groundwater and soils

    DOE Patents [OSTI]

    Corey, J.C.; Kaback, D.S.; Looney, B.B.

    1991-01-01T23:59:59.000Z

    The present invention relates to a system for in-situ remediation of contaminated groundwater and soil. In particular the present invention relates to stabilizing toxic metals in groundwater and soil. The United States Government has rights in this invention pursuant to Contract No. DE-AC09-89SR18035 between the US Department of Energy and Westinghouse Savannah River Company.

  6. Securing Internet Coordinate Embedding Systems Mohamed Ali Kaafar

    E-Print Network [OSTI]

    Turletti, Thierry

    Securing Internet Coordinate Embedding Systems Mohamed Ali Kaafar INRIA Sophia Antipolis, FR mkaafar@sophia.inria.fr Laurent Mathy Lancaster University, UK laurent@comp.lancs.ac.uk Chadi Barakat INRIA Sophia Antipolis, FR barakat@sophia.inria.fr Kave Salamatian LIP6, FR and EPFL, CH kave

  7. Virtual Networks under Attack: Disrupting Internet Coordinate Systems

    E-Print Network [OSTI]

    Turletti, Thierry

    Sophia Antipolis, FR mkaafar@sophia.inria.fr Laurent Mathy Lancaster University, UK and LAAS-CNRS, FR laurent@comp.lancs.ac.uk Thierry Turletti INRIA Sophia Antipolis, FR turletti@sophia.inria.fr Walid Dabbous INRIA Sophia Antipolis, FR dabbous@sophia.inria.fr ABSTRACT Internet coordinate-based systems

  8. Combining Tools for the Verification of FaultTolerant Systems

    E-Print Network [OSTI]

    Peleska, Jan - Fachbereich 3

    and verification of fault≠tolerant systems according to the invent&verify paradigm. Our method is based on the CSP specifications (CSP process terms), refinement relations or combinations of these three description formalisms specification paradigms ac≠ cording to the specific needs of each development step is essential to cope

  9. A Wireless Differential Protection System for Air-Core Inductors

    E-Print Network [OSTI]

    Brown III, Donald R.

    of these medium voltage (MV) inductors is relatively simple by comparison where most are typically designed as dry-type, Inductors, Transformers, Communication systems. I. Introduction Distributed capacitance in AC transmission inductors on the tertiary side of a step-down transformer or auto- transformer [2]. The construction

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

    DOE Patents [OSTI]

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

    2014-10-14T23:59:59.000Z

    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.

  11. A Novel Inductor-less DC-AC Cascaded H-bridge Multilevel Boost Inverter for Electric/Hybrid Electric Vehicle Applications

    SciTech Connect (OSTI)

    Du, Zhong [ORNL; Ozpineci, Burak [ORNL; Tolbert, Leon M [ORNL; Chiasson, John N [ORNL

    2007-01-01T23:59:59.000Z

    This paper presents an inductorless cascaded H- bridge multilevel boost inverter for EV and HEV applications. Currently available power inverter systems for HEVs use a DC- DC boost converter to boost the battery voltage for a traditional 3-phase inverter. The present HEV traction drive inverters have low power density, are expensive, and have low efficiency because they need a bulky inductor. An inductorless cascaded H-bridge multilevel boost inverter for EV and HEV applications is proposed in this paper. Traditionally, each H-bridge needs a DC power supply. The proposed inductorless cascaded H-bridge multilevel boost inverter uses a standard 3-leg inverter (one leg for each phase) and an H-bridge in series with each inverter leg which uses a capacitor as the DC power source. Fundamental switching scheme is used to do modulation control and to produce a 5-level phase voltage. Experiments show that the proposed inductorless DC-AC cascaded H-bridge multilevel boost inverter can output a boosted AC voltage.

  12. KAIST {jmcho, yjoh, jbyoo, cha}@salmosa.kaist.ac.kr

    E-Print Network [OSTI]

    System . 2.2. 2.3.4 , AECL(The Atomic Energy of Cnanda Limited) . [2] AECL FRS for Nuclear Domain) . KSSAN AECL . ACEL DFD FOD(Function Overview Diagrams) condition-event SDT

  13. SPRING 2003 C I R AC I R A

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    12 14 Dryline Thunderstorm Development...........14 Cover photo courtesy of U.S. Department systems from seeing objects near the ground from an aircraft or space- based sensor. Conversely, opaque

  14. 225-Ac and 223-Ra Production via 800 MeV Proton Irradiation of Natural Thorium Target

    E-Print Network [OSTI]

    J. W. Weidner; S. G. Mashnik; K. D. John; B. Ballard; E. R. Birnbaum; L. J. Bitteker; A. Couture; M. E. Fassbender; G. S. Goff; R. Gritzo; F. M. Hemez; W. Runde; J. L. Ullmann; L. E. Wolfsberg; F. M. Nortier

    2012-04-10T23:59:59.000Z

    Cross sections for the formation of 225,227-Ac, 223,225-Ra, and 227-Th via the proton bombardment of natural thorium targets were measured at a nominal proton energy of 800 MeV. No earlier experimental cross section data for the production of 223,225-Ra, 227-Ac and 227-Th by this method were found in the literature. A comparison of theoretical predictions with the experimental data shows agreement within a factor of two. Results indicate that accelerator-based production of 225-Ac and 223-Ra is a viable production method.

  15. Capital Cost-Aware Design and Partial Shading-Aware Architecture Optimization of a Reconfigurable Photovoltaic System

    E-Print Network [OSTI]

    Pedram, Massoud

    Photovoltaic System Yanzhi Wang, Xue Lin, and Massoud Pedram University of Southern California Los Angeles, CA Seoul, Korea 151-744 {jmkim, naehyuck}@elpl.snu.ac.kr Abstract-- Photovoltaic (PV) systems are often and will not be changed after PV system installation in the field. Determining the optimal size of the PV macro

  16. IEEE Journal on Selected Areas in Communications, 1993. vol 11(9): pp 1404-1414 Policy Hierarchies for Distributed Systems Management

    E-Print Network [OSTI]

    Moffett, Jonathan

    Hierarchies for Distributed Systems Management 5 July 1993 Jonathan D. Moffett Department of Computer Science@doc.ic.ac.uk Abstract Distributed system management, involves monitoring the activity of a system, making management on management has concentrated on management mechanisms related to Network Management or Operating Systems

  17. Enhancing Efficiency and Robustness of a Photovoltaic Power System under Partial Shading

    E-Print Network [OSTI]

    Pedram, Massoud

    with the battery arrays and incorporate the HEES into the PV system. We apply a crossover filter to the irradiation and temperature profiles of the source PV modules, and thereby allow the battery arrays to steadily receive energy}@usc.edu, 2 E-mail: {yhkim, naehyuck}@elpl.snu.ac.kr Abstract Photovoltaic (PV) power systems have been widely

  18. Dynamic Reconfiguration of Photovoltaic Energy Harvesting System in Hybrid Electric Vehicles

    E-Print Network [OSTI]

    Pedram, Massoud

    Dynamic Reconfiguration of Photovoltaic Energy Harvesting System in Hybrid Electric Vehicles Yanzhi, xuelin, pedram}@usc.edu, 2 {naehyuck}@elpl.snu.ac.kr ABSTRACT Photovoltaic (PV) energy harvesting system and Reliability]: Performance Analysis and Design Aids. General Terms Algorithms, Design, Management, Performance

  19. The Prediction of Extratropical Storm Tracks by the ECMWF and NCEP Ensemble Prediction Systems

    E-Print Network [OSTI]

    Begstsson, Lennart

    The Prediction of Extratropical Storm Tracks by the ECMWF and NCEP Ensemble Prediction Systems Author: Email: lsrf@mail.nerc-essc.ac.uk #12;Abstract The prediction of extratropical cyclones Prediction (NCEP) Ensemble Prediction Systems (EPS) has been investigated using an objective feature tracking

  20. RoomZoner: Occupancy-based Room-Level Zoning of a Centralized HVAC System

    E-Print Network [OSTI]

    Whitehouse, Kamin

    RoomZoner: Occupancy-based Room-Level Zoning of a Centralized HVAC System Tamim Sookoor & Kamin. In this paper we present a CPS that enables a centralized Heating, Ventila- tion, and Air Conditioning (HVAC application due to residential HVAC systems ac- counting for over 15% of all U.S. energy usage, making it one