Sample records for 230v ac induction

  1. A test platform for measuring the energy efficiency of AC induction motors under various loading conditions and control schemes/

    E-Print Network [OSTI]

    Granata, John A. (John Anthony)

    2012-01-01T23:59:59.000Z

    A test platform was developed to measure and compare the energy efficiency of an AC induction motor under steady-state and cyclical loading conditions while operating in both a constant speed mode and while performing speed ...

  2. Method and apparatus for pulse width modulation control of an AC induction motor

    DOE Patents [OSTI]

    Geppert, Steven (Bloomfield Hills, MI); Slicker, James M. (Union Lake, MI)

    1984-01-01T23:59:59.000Z

    An inverter is connected between a source of DC power and a three-phase AC induction motor, and a micro-processor-based circuit controls the inverter using pulse width modulation techniques. In the disclosed method of pulse width modulation, both edges of each pulse of a carrier pulse train are equally modulated by a time proportional to sin .THETA., where .THETA. is the angular displacement of the pulse center at the motor stator frequency from a fixed reference point on the carrier waveform. The carrier waveform frequency is a multiple of the motor stator frequency. The modulated pulse train is then applied to each of the motor phase inputs with respective phase shifts of 120.degree. at the stator frequency. Switching control commands of electronic switches in the inverter are stored in a random access memory (RAM) and the locations of the RAM are successively read out in a cyclic manner, each bit of a given RAM location controlling a respective phase input of the motor. The DC power source preferably comprises rechargeable batteries and all but one of the electronic switches in the inverter can be disabled, the remaining electronic switch being part of a "flyback" DC-DC converter circuit for recharging the battery.

  3. Control of power to an inductively heated part

    DOE Patents [OSTI]

    Adkins, D.R.; Frost, C.A.; Kahle, P.M.; Kelley, J.B.; Stanton, S.L.

    1997-05-20T23:59:59.000Z

    A process for induction hardening a part to a desired depth with an AC signal applied to the part from a closely coupled induction coil includes measuring the voltage of the AC signal at the coil and the current passing through the coil; and controlling the depth of hardening of the part from the measured voltage and current. The control system determines parameters of the part that are functions of applied voltage and current to the induction coil, and uses a neural network to control the application of the AC signal based on the detected functions for each part. 6 figs.

  4. Control of power to an inductively heated part

    DOE Patents [OSTI]

    Adkins, Douglas R. (1620 Adelita Dr. NE., Albuquerque, NM 87112); Frost, Charles A. (1039 Red Oaks Loop NE., Albuquerque, NM 87122); Kahle, Philip M. (528 Longwood Loop NE., Rio Rancho, NM 87124); Kelley, J. Bruce (13200 Blue Corn Maiden Trail NE., Albuquerque, NM 87112); Stanton, Suzanne L. (2805 Palo Alto NE., Albuquerque, NM 87112)

    1997-01-01T23:59:59.000Z

    A process for induction hardening a part to a desired depth with an AC signal applied to the part from a closely coupled induction coil includes measuring the voltage of the AC signal at the coil and the current passing through the coil; and controlling the depth of hardening of the part from the measured voltage and current. The control system determines parameters of the part that are functions of applied voltage and current to the induction coil, and uses a neural network to control the application of the AC signal based on the detected functions for each part.

  5. 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...

  6. Improved Unsupervised POS Induction through Prototype Discovery Omri Abend1

    E-Print Network [OSTI]

    Rappoport, Ari

    Rappoport1 1 Institute of Computer Science, 2 ICNC Hebrew University of Jerusalem {omria01|roiri|arir}@cs.huji.ac.il Abstract We present a novel fully unsupervised al- gorithm for POS induction from plain text, motivated and for multi-lingual systems (Jiang et al., 2009). Automatic induction of POS tags from plain text can greatly

  7. Hybrid-secondary uncluttered induction machine

    DOE Patents [OSTI]

    Hsu, John S. (Oak Ridge, TN)

    2001-01-01T23:59:59.000Z

    An uncluttered secondary induction machine (100) includes an uncluttered rotating transformer (66) which is mounted on the same shaft as the rotor (73) of the induction machine. Current in the rotor (73) is electrically connected to current in the rotor winding (67) of the transformer, which is not electrically connected to, but is magnetically coupled to, a stator secondary winding (40). The stator secondary winding (40) is alternately connected to an effective resistance (41), an AC source inverter (42) or a magnetic switch (43) to provide a cost effective slip-energy-controlled, adjustable speed, induction motor that operates over a wide speed range from below synchronous speed to above synchronous speed based on the AC line frequency fed to the stator.

  8. Crystallographic Texture of Induction-welded and Heat-treated Pipeline Steel

    E-Print Network [OSTI]

    Cambridge, University of

    Crystallographic Texture of Induction-welded and Heat-treated Pipeline Steel P. Yan1,a, �. E.thibaux@arcelormittal.com, dhkdb@cam.ac.uk Keywords: crystallographic texture; pipeline steel; induction welding; induction heat°. Microstructural Characterisation Pipelines steels are normally hot­rolled at elevated temperatures

  9. On the Three Forms of Non-Deductive Inferences: Induction, Abduction, and Design

    E-Print Network [OSTI]

    Kikuchi, Makoto

    On the Three Forms of Non-Deductive Inferences: Induction, Abduction, and Design Makoto Kikuchi@kobe-u.ac.jp ABSTRACT Induction and abduction are well known non-deductive inferences. We shall propose that design-Based Reasoning, Case-Based Reasoning, Induc- tion, Abduction, Design, Channel Theory 1 Introduction In the late

  10. 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

  11. Circle diagram approach for self excited induction generators

    SciTech Connect (OSTI)

    Muljadi, E.; Carlin, P.W.; Osgood, R.M.

    1993-05-01T23:59:59.000Z

    When an induction generator is connected to a utility line supply, the voltage and frequency at the terminal output are the same as the voltage and frequency of the utility line supply to which the generator is connected. The reactive power needed by the induction generator is supplied by the utility and the real power is returned to the utility. With a fixed frequency dictated by the utility, the induction machine starts generating above the synchronous speed. The range of speed is also limited by the slip. At a very high slip, the copper losses increases as the current increases. On the other hand, in an isolated operation, the induction generator operates in self-excitation mode. It determines its own voltage and frequency. These two quantities depend on the size of the AC capacitor, the induction machine parameters, the electrical load, and the speed of the generator. The operating speed of the induction generator is extended without generating excessive loss. This paper presents an analytical study by utilizing a circle diagram to illustrate the operation of the induction generator in isolated operation. The steady-state calculations are presented to support the analysis. Possible applications for the system in variable-speed generation are currently under investigation. The output can be directly connected to equipment that is non-sensitive to the frequency (a heater, battery charger, etc.) or can be connected to a converter to get a fixed-frequency AC output.

  12. Computer Science Induction to

    E-Print Network [OSTI]

    Berger, Ulrich

    Computer Science Induction to Postgraduate Research Studies Ulrich Berger Head of Postgraduate Research Supervision Regulations Progression Regulations Computer Science Induction to Postgraduate Research Studies Ulrich Berger Head of Postgraduate Research Department of Computer Science Swansea

  13. 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.

  14. 2nd Coq workshop, Edinburgh, Scotland c S. Wilson, J. Fleuriot & A. Smaill Inductive Proof Automation for Coq

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Automation for Coq Sean Wilson Jacques Fleuriot Alan Smaill School of Informatics, The University of Edinburgh {sean.wilson,jacques.fleuriot,a.smaill}@ed.ac.uk We introduce inductive proof automation for Coq support for proofs involving case splits and multiple inductive hypotheses. The automation makes use

  15. Beam Dynamics for Induction Accelerators

    E-Print Network [OSTI]

    Lee, E.P.

    2014-01-01T23:59:59.000Z

    Dynamics for Induction Accelerators Edward P. Lee Lawrencea natural candidate accelerator for a heavy ion fusion (HIF)words: Fusion, Induction, Accelerators, Dynamics This work

  16. Induction melter apparatus

    SciTech Connect (OSTI)

    Roach, Jay A [Idaho Falls, ID; Richardson, John G [Idaho Falls, ID; Raivo, Brian D [Idaho Falls, ID; Soelberg, Nicholas R [Idaho Falls, ID

    2008-06-17T23:59:59.000Z

    Apparatus and methods of operation are provided for a cold-crucible-induction melter for vitrifying waste wherein a single induction power supply may be used to effect a selected thermal distribution by independently energizing at least two inductors. Also, a bottom drain assembly may be heated by an inductor and may include an electrically resistive heater. The bottom drain assembly may be cooled to solidify molten material passing therethrough to prevent discharge of molten material therefrom. Configurations are provided wherein the induction flux skin depth substantially corresponds with the central longitudinal axis of the crucible. Further, the drain tube may be positioned within the induction flux skin depth in relation to material within the crucible or may be substantially aligned with a direction of flow of molten material within the crucible. An improved head design including four shells forming thermal radiation shields and at least two gas-cooled plenums is also disclosed.

  17. Doubly fed induction machine

    DOE Patents [OSTI]

    Skeist, S. Merrill; Baker, Richard H.

    2005-10-11T23:59:59.000Z

    An electro-mechanical energy conversion system coupled between an energy source and an energy load including an energy converter device having a doubly fed induction machine coupled between the energy source and the energy load to convert the energy from the energy source and to transfer the converted energy to the energy load and an energy transfer multiplexer coupled to the energy converter device to control the flow of power or energy through the doubly fed induction machine.

  18. Linear induction accelerator

    DOE Patents [OSTI]

    Buttram, M.T.; Ginn, J.W.

    1988-06-21T23:59:59.000Z

    A linear induction accelerator includes a plurality of adder cavities arranged in a series and provided in a structure which is evacuated so that a vacuum inductance is provided between each adder cavity and the structure. An energy storage system for the adder cavities includes a pulsed current source and a respective plurality of bipolar converting networks connected thereto. The bipolar high-voltage, high-repetition-rate square pulse train sets and resets the cavities. 4 figs.

  19. MBB Safety Induction Pack TO MAKE SURE THAT ALL NEW MEMBERS OF THE DEPARTMENT

    E-Print Network [OSTI]

    Williamson, Mike P.

    & Safety Policy and can work within its requirements. It can be accessed on the Safety Services web page ............................................. Registration for Genetic Manipulation Work If required email safety@shef.ac.uk - check with Academic Supervisor .......................MBB Safety Induction Pack TO MAKE SURE THAT ALL NEW MEMBERS OF THE DEPARTMENT ATTEND THE REQUIRED

  20. 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.

  1. On Automating Inductive and Non-Inductive Termination Methods

    E-Print Network [OSTI]

    Kamareddine, Fairouz

    On Automating Inductive and Non-Inductive Termination Methods Fairouz Kamareddine and Francois of the function which satis es a notion of terminal prop- erty and then verifying that this construction processPre can only deal with the termination proofs that are inductive. There are however many functions

  2. Induction plasma tube

    DOE Patents [OSTI]

    Hull, D.E.

    1982-07-02T23:59:59.000Z

    An induction plasma tube having a segmented, fluid-cooled internal radiation shield is disclosed. The individual segments are thick in cross-section such that the shield occupies a substantial fraction of the internal volume of the plasma enclosure, resulting in improved performance and higher sustainable plasma temperatures. The individual segments of the shield are preferably cooled by means of a counterflow fluid cooling system wherein each segment includes a central bore and a fluid supply tube extending into the bore. The counterflow cooling system results in improved cooling of the individual segments and also permits use of relatively larger shield segments which permit improved electromagnetic coupling between the induction coil and a plasma located inside the shield. Four embodiments of the invention, each having particular advantages, are disclosed.

  3. Induction plasma tube

    DOE Patents [OSTI]

    Hull, Donald E. (Los Alamos, NM)

    1984-01-01T23:59:59.000Z

    An induction plasma tube having a segmented, fluid-cooled internal radiation shield is disclosed. The individual segments are thick in cross-section such that the shield occupies a substantial fraction of the internal volume of the plasma enclosure, resulting in improved performance and higher sustainable plasma temperatures. The individual segments of the shield are preferably cooled by means of a counterflow fluid cooling system wherein each segment includes a central bore and a fluid supply tube extending into the bore. The counterflow cooling system results in improved cooling of the individual segments and also permits use of relatively larger shield segments which permit improved electromagnetic coupling between the induction coil and a plasma located inside the shield. Four embodiments of the invention, each having particular advantages, are disclosed.

  4. CD54AC04, CD74AC04 HEX INVERTERS

    E-Print Network [OSTI]

    Kretchmar, R. Matthew

    °C to 125°C SOIC M Tube CD74AC04M AC04M­55°C to 125°C 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

  5. 1310 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 55, NO. 3, MARCH 2008 Induction Machine Broken Bar and Stator

    E-Print Network [OSTI]

    Povinelli, Richard J.

    of the stator current [7], [8], [22], [25]. Other techniques include vibration analysis, acoustic noise as evidenced by the given experimental results, which validate this method. Index Terms--AC motor drive systems motors, interturn short circuits. I. INTRODUCTION INDUCTION machines (IMs) are complex electromechani

  6. Induction Linac Pulsers

    SciTech Connect (OSTI)

    Faltens, Andris

    2011-01-07T23:59:59.000Z

    The pulsers used in most of the induction linacs evolved from the very large body of work that was done in the U.S. and Great Britain during the development of the pulsed magnetron for radar. The radar modulators started at {approx}100 kW and reached >10 MW by 1945. A typical pulse length was 1 {mu}s at a repetition rate of 1,000 pps. A very comprehensive account of the modulator development is Pulse Generators by Lebacqz and Glasoe, one of the Radiation Laboratory Series. There are many permutations of possible modulators, two of the choices being tube type and line type. In earlier notes I wrote that technically the vacuum tube pulser met all of our induction linac needs, in the sense that a number of tubes, in series and parallel if required, could produce our pulses, regulate their voltage, be useable in feed-forward correctors, and provide a low source impedance. At a lower speed, an FET array is similar, and we have obtained and tested a large array capable of >10 MW switching. A modulator with an electronically controlled output only needs a capacitor for energy storage and in a switched mode can transfer the energy from the capacitor to the load at high efficiency. Driving a full size Astron induction core and a simulated resistive 'beam load' we achieved >50% efficiency. These electronically controlled output pulses can produce the pulses we desire but are not used because of their high cost. The second choice, the line type pulser, visually comprises a closing switch and a distributed or a lumped element transmission line. The typical switch cannot open or stop conducting after the desired pulse has been produced, and consequently all of the initially stored energy is dissipated. This approximately halves the efficiency, and the original cost estimating program LIACEP used this factor of two, even though our circuits are usually worse, and even though our inveterate optimists often omit it. The 'missing' energy is that which is reflected back into the line from mismatches, the energy left in the accelerator module's capacitance, the energy lost in the switch during switching and during the pulse, and the energy lost in the pulse line charging circuit. For example, a simple resistor-limited power supply dissipates as much energy as it delivers to the pulse forming line, giving a factor if two by itself, therefore efficiency requires a more complicated charging system.

  7. Accounting & Finance (BAcc) Induction 2014

    E-Print Network [OSTI]

    Glasgow, University of

    Accounting & Finance (BAcc) Induction 2014 Monday 15 September 2014 Induction Programme: 0945] Welcome from the Business School and Accounting & Finance 1000 The Accountancy Degrees 1015 Programme & 3 on Level 4 Accounting & Finance Bldg Tuesday 16 September 2014 Advising Session Lunch (provided

  8. Borehole induction coil transmitter

    DOE Patents [OSTI]

    Holladay, Gale (Livermore, CA); Wilt, Michael J. (Walnut Creek, CA)

    2002-01-01T23:59:59.000Z

    A borehole induction coil transmitter which is a part of a cross-borehole electromagnetic field system that is used for underground imaging applications. The transmitter consists of four major parts: 1) a wound ferrite or mu-metal core, 2) an array of tuning capacitors, 3) a current driver circuit board, and 4) a flux monitor. The core is wound with several hundred turns of wire and connected in series with the capacitor array, to produce a tuned coil. This tuned coil uses internal circuitry to generate sinusoidal signals that are transmitted through the earth to a receiver coil in another borehole. The transmitter can operate at frequencies from 1-200 kHz and supplies sufficient power to permit the field system to operate in boreholes separated by up to 400 meters.

  9. 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

  10. 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.

  11. 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.

  12. Investigation of self-excited induction generators for wind turbine applications

    SciTech Connect (OSTI)

    Muljadi, E.; Butterfield, C.P.; Sallan, J.; Sanz, M.

    2000-02-28T23:59:59.000Z

    The use of squirrel-cage induction machines in wind generation is widely accepted as a generator of choice. The squirrel-cage induction machine is simple, reliable, cheap, lightweight, and requires very little maintenance. Generally, the induction generator is connected to the utility at constant frequency. With a constant frequency operation, the induction generator operates at practically constant speed (small range of slip). The wind turbine operates in optimum efficiency only within a small range of wind speed variation. The variable-speed operation allows an increase in energy captured and reduces both the torque peaks in the drive train and the power fluctuations sent to the utility. In variable-speed operation, an induction generator needs an interface to convert the variable frequency output of the generator to the fixed frequency at the utility. This interface can be simplified by using a self-excited generator because a simple diode bridge is required to perform the ac/dc conversion. The subsequent dc/ac conversion can be performed using different techniques. The use of a thyristor bridge is readily available for large power conversion and has a lower cost and higher reliability. The firing angle of the inverter bridge can be controlled to track the optimum power curve of the wind turbine. With only diodes and thyristors used in power conversion, the system can be scaled up to a very high voltage and high power applications. This paper analyzes the operation of such a system applied to a 1/3-hp self-excited induction generator. It includes the simulations and tests performed for the different excitation configurations.

  13. High pressure, high current, low inductance, high reliability sealed terminals

    DOE Patents [OSTI]

    Hsu, John S. (Oak Ridge, TN) [Oak Ridge, TN; McKeever, John W. (Oak Ridge, TN) [Oak Ridge, TN

    2010-03-23T23:59:59.000Z

    The invention is a terminal assembly having a casing with at least one delivery tapered-cone conductor and at least one return tapered-cone conductor routed there-through. The delivery and return tapered-cone conductors are electrically isolated from each other and positioned in the annuluses of ordered concentric cones at an off-normal angle. The tapered cone conductor service can be AC phase conductors and DC link conductors. The center core has at least one service conduit of gate signal leads, diagnostic signal wires, and refrigerant tubing routed there-through. A seal material is in direct contact with the casing inner surface, the tapered-cone conductors, and the service conduits thereby hermetically filling the interstitial space in the casing interior core and center core. The assembly provides simultaneous high-current, high-pressure, low-inductance, and high-reliability service.

  14. Physics Safety Induction OCTOBER 2012

    E-Print Network [OSTI]

    Tobar, Michael

    Physics Safety Induction OCTOBER 2012 FACULTY OF SCIENCES #12;The University of Western Australia · Be safe · Report anything unsafe #12;The University of Western Australia Physics Occupational Safety Sharma ­ ICRAR · Nikita Kostylev ­ Student Representative #12;The University of Western Australia School

  15. Parallel algorithms for inductance extraction

    E-Print Network [OSTI]

    Mahawar, Hemant

    2007-09-17T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . . . . . . . . 30 3. Pin Connect . . . . . . . . . . . . . . . . . . . . . . . . . 31 C. The Inductance Extraction Algorithm . . . . . . . . . . . . . . 33 ix CHAPTER Page V COMPARISON WITH EXISTING WORK . . . . . . . . . . . . . 35 A. Ground Plane... . . . . . . . . . . . . . . . . . . . . . . . 52 1. Shared Memory Parallelization . . . . . . . . . . . . . . . 53 2. Mixed Mode Parallelization . . . . . . . . . . . . . . . . . 55 3. Distributed Memory Parallelization . . . . . . . . . . . . . 56 VII CONCLUSIONS...

  16. The Automation Of Proof By Mathematical Induction 

    E-Print Network [OSTI]

    Bundy, Alan

    This paper is a chapter of the Handbook of Automated Reasoning edited by Voronkov and Robinson. It describes techniques for automated reasoning in theories containing rules of mathematical induction. Firstly, inductive reasoning is defined and its...

  17. 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

  18. Non-carbon induction furnace

    DOE Patents [OSTI]

    Holcombe, C.E.; Masters, D.R.; Pfeiler, W.A.

    1984-01-06T23:59:59.000Z

    The present invention is directed to an induction furnace for melting and casting highly pure metals and alloys such as uranium and uranium alloys in such a manner as to minimize contamination of the melt by carbon derived from the materials and the environment within the furnace. The subject furnace is constructed of non-carbon materials and is housed within a conventional vacuum chamber. The furnace comprises a ceramic oxide crucible for holding the charge of metal or alloys. The heating of the crucible is achieved by a plasma-sprayed tungsten susceptor surrounding the crucible which, in turn, is heated by an rf induction coil separated from the susceptor by a cylinder of inorganic insulation. The furnace of the present invention is capable of being rapidly cycled from ambient temperatures to about 1650/sup 0/C for effectively melting uranium and uranium alloys without the attendant carbon contamination problems previously encountered when using carbon-bearing furnace materials.

  19. Segmented rail linear induction motor

    DOE Patents [OSTI]

    Cowan, Jr., Maynard (1107 Stagecoach Rd. SE., Albuquerque, NM 87123); Marder, Barry M. (1412 Pinnacle View Dr. NE., Albuquerque, NM 87123)

    1996-01-01T23:59:59.000Z

    A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces.

  20. Segmented rail linear induction motor

    DOE Patents [OSTI]

    Cowan, M. Jr.; Marder, B.M.

    1996-09-03T23:59:59.000Z

    A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces. 6 figs.

  1. A linear induction motor conveyer

    E-Print Network [OSTI]

    Solinsky, Kenneth Sheldon

    1973-01-01T23:59:59.000Z

    A LINEAR INCUCTION MOTOR CONVEYER A Thesis Kenneth Sheldon. Solinsky Submitted to the Graduate College of Texas AkM University in partial fulfillment of the requirement for the degree of MASTER 07 SCIENCE May 1973 Major Subject: Industrial.... Howie, USAMC-ITC-P/P, Red River Army Depot, Texarkana, Texas 75501. Approved owxe, xe , ro uc o uction Engineering For the Commander ne , grec or, I A LINEAR INDUCTION MOTOR CONVEYER A Thesis by Kenneth Sheldon Solinsky App ved as to style...

  2. 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

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

    E-Print Network [OSTI]

    Kretchmar, R. Matthew

    SOIC M Tube CD74AC08M AC08M­55°C to 125°C 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

  4. Monitoring transients in low inductance circuits

    DOE Patents [OSTI]

    Guilford, R.P.; Rosborough, J.R.

    1985-10-21T23:59:59.000Z

    The instant invention relates to methods of and apparatus for monitoring transients in low inductance circuits and to a probe utilized to practice said method and apparatus. More particularly, the instant invention relates to methods of and apparatus for monitoring low inductance circuits, wherein the low inductance circuits include a pair of flat cable transmission lines. The instant invention is further directed to a probe for use in monitoring pairs of flat cable transmission lines.

  5. Induction slag reduction process for making titanium

    DOE Patents [OSTI]

    Traut, Davis E. (Corvallis, OR)

    1991-01-01T23:59:59.000Z

    Continuous process for preparing titanium comprising fluorinating titanium ore, and reducing the formed alkaline earth fluotitanate with an alkaline earth metal in an induction slag reactor.

  6. Element of an inductive coupler

    DOE Patents [OSTI]

    Hall, David R.; Fox, Joe

    2006-08-15T23:59:59.000Z

    An element for an inductive coupler in a downhole component comprises magnetically conductive material, which is disposed in a recess in annular housing. The magnetically conductive material forms a generally circular trough. The circular trough comprises an outer generally U-shaped surface, an inner generally U-shaped surface, and two generally planar surfaces joining the inner and outer surfaces. The element further comprises pressure relief grooves in at least one of the surfaces of the circular trough. The pressure relief grooves may be scored lines. Preferably the pressure relief grooves are parallel to the magnetic field generated by the magnetically conductive material. The magnetically conductive material is selected from the group consisting of soft iron, ferrite, a nickel iron alloy, a silicon iron alloy, a cobalt iron alloy, and a mu-metal. Preferably, the annular housing is a metal ring.

  7. Mobile inductively coupled plasma system

    DOE Patents [OSTI]

    D'Silva, Arthur P. (Ames, IA); Jaselskis, Edward J. (Ames, IA)

    1999-03-30T23:59:59.000Z

    A system for sampling and analyzing a material located at a hazardous site. A laser located remote from the hazardous site is connected to an optical fiber, which directs laser radiation proximate the material at the hazardous site. The laser radiation abates a sample of the material. An inductively coupled plasma is located remotely from the material. An aerosol transport system carries the ablated particles to a plasma, where they are dissociated, atomized and excited to provide characteristic optical reduction of the elemental constituents of the sample. An optical spectrometer is located remotely from the site. A second optical fiber is connected to the optical spectrometer at one end and the plasma source at the other end to carry the optical radiation from the plasma source to the spectrometer.

  8. Mobile inductively coupled plasma system

    DOE Patents [OSTI]

    D`Silva, A.P.; Jaselskis, E.J.

    1999-03-30T23:59:59.000Z

    A system is described for sampling and analyzing a material located at a hazardous site. A laser located remotely from the hazardous site is connected to an optical fiber, which directs laser radiation proximate the material at the hazardous site. The laser radiation abates a sample of the material. An inductively coupled plasma is located remotely from the material. An aerosol transport system carries the ablated particles to a plasma, where they are dissociated, atomized and excited to provide characteristic optical reduction of the elemental constituents of the sample. An optical spectrometer is located remotely from the site. A second optical fiber is connected to the optical spectrometer at one end and the plasma source at the other end to carry the optical radiation from the plasma source to the spectrometer. 10 figs.

  9. E-Print Network 3.0 - ac induction motors Sample Search Results

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

    Page: << < 1 2 3 4 5 > >> 1 Electric Motor Drive Selection Issues for HEV Propulsion Systems: A Comparative Study Summary: semiconductors made it increasingly practical to...

  10. A digital induction wattmeter suitable for use with the A-C network calculator

    E-Print Network [OSTI]

    Larsen, Michael Joe

    1959-01-01T23:59:59.000Z

    is shown in Fig. lg. when the wattneter pointer noved to the left, the relay is energiaed and the polarity of the voltage to the potential coil is reversed. when the pointer novas to the left, the relay contacts are in their nornal position...

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

    E-Print Network [OSTI]

    Kretchmar, R. Matthew

    to 125°C 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

  12. 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

  13. 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 to… (more)

  14. 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.

  15. Motor torque compensation of an induction electric motor by adjusting a slip command during periods of supposed change in motor temperature

    SciTech Connect (OSTI)

    Kelledes, William L. (Brighton, MI); St. John, Don K. (Livonia, MI)

    1992-01-01T23:59:59.000Z

    The present invention maintains constant torque in an inverter driven AC induction motor during variations in rotor temperature. It is known that the torque output of a given AC induction motor is dependent upon rotor temperature. At rotor temperatures higher than the nominal operating condition the rotor impedance increases, reducing the rotor current and motor torque. In a similar fashion, the rotor impedance is reduced resulting in increased rotor current and motor torque when the rotor temperature is lower than the nominal operating condition. The present invention monitors the bus current from the DC supply to the inverter and adjusts the slip frequency of the inverter drive to maintain a constant motor torque. This adjustment is based upon whether predetermined conditions implying increased rotor temperature or decreased rotor temperature exist for longer that a predetermined interval of time.

  16. 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 ...

  17. 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

  18. 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...

  19. Inductive tuners for microwave driven discharge lamps

    DOE Patents [OSTI]

    Simpson, James E. (Gaithersburg, MD)

    1999-01-01T23:59:59.000Z

    An RF powered electrodeless lamp utilizing an inductive tuner in the waveguide which couples the RF power to the lamp cavity, for reducing reflected RF power and causing the lamp to operate efficiently.

  20. SENSORLESS INDUCTION MOTOR CONTROL USING STATISTICAL

    E-Print Network [OSTI]

    is replaced by npM so that the dynamic model of the induction motor is then uSa = RSiSa + LS d dtiSa + M d dti

  1. (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

  2. Parameter estimation of vector controlled induction machine

    E-Print Network [OSTI]

    Rahman, Tahmid Ur

    2002-01-01T23:59:59.000Z

    that this method can be employed for sensorless speed estimation and can be applied to motors like synchronous reluctance machine. CHAPTER II DYNAMIC MODELING OF INDUCTION MACHINE The well-known steady state equivalent circuit of induction motor sometimes... response without updating. . . . . , Rotor time constant converging with the actual value. . . . . . 78 79 CHAPTER I INTRODUCTION The growth of industrial motor drives over the past 10 years has exceeded 25% which is an unprecedented leap if one...

  3. Principle of Mathematical Induction (PMI) Statement of the Principle of Mathematical Induction

    E-Print Network [OSTI]

    Singman, David

    Principle of Mathematical Induction (PMI) Statement of the Principle of Mathematical Induction Let you have a subset S of N which you wish to prove is all of N. If you use PMI, the proof can be written as follows. Outline of a proof by PMI Proof. We prove this result using PMI. Let S = . . . (describe the set

  4. 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...

  5. Inductive gas line for pulsed lasers

    DOE Patents [OSTI]

    Benett, William J. (Livermore, CA); Alger, Terry W. (Tracy, CA)

    1985-01-01T23:59:59.000Z

    A gas laser having a metal inlet gas feed line assembly shaped as a coil, to function as an electrical inductance and therefore high impedance to pulses of electric current applied to electrodes at opposite ends of a discharge tube of a laser, for example. This eliminates a discharge path for the laser through the inlet gas feed line. A ferrite core extends through the coil to increase the inductance of the coil and provide better electric isolation. By elimination of any discharge breakdown through the gas supply, efficiency is increased and a significantly longer operating lifetime of the laser is provided.

  6. Inductive gas line for pulsed lasers

    DOE Patents [OSTI]

    Benett, W.J.; Alger, T.W.

    1982-09-29T23:59:59.000Z

    A gas laser having a metal inlet gas feed line assembly shaped as a coil, to function as an electrical inductance and therefore high impedance to pulses of electric current applied to electrodes at opposite ends of a discharge tube of a laser, for example. This eliminates a discharge path for the laser through the inlet gas feed line. A ferrite core extends through the coil to increase the inductance of the coil and provide better electric isolation. By elimination of any discharge breakdown through the gas supply, efficiency is increased and a significantly longer operating lifetime of the laser is provided.

  7. Low-frequency, self-sustained oscillations in inductively coupled plasmas used for optical pumping

    SciTech Connect (OSTI)

    Coffer, J.; Encalada, N.; Huang, M.; Camparo, J. [Physical Sciences Laboratories, The Aerospace Corporation 2310, E. El Segundo Blvd., El Segundo, California 90245 (United States)

    2014-10-28T23:59:59.000Z

    We have investigated very low frequency, on the order of one hertz, self-pulsing in alkali-metal inductively-coupled plasmas (i.e., rf-discharge lamps). This self-pulsing has the potential to significantly vary signal-to-noise ratios and (via the ac-Stark shift) resonant frequencies in optically pumped atomic clocks and magnetometers (e.g., the atomic clocks now flying on GPS and Galileo global navigation system satellites). The phenomenon arises from a nonlinear interaction between the atomic physics of radiation trapping and the plasma's electrical nature. To explain the effect, we have developed an evaporation/condensation theory (EC theory) of the self-pulsing phenomenon.

  8. 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

  9. 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.

  10. Steady-state inductive spheromak operation

    DOE Patents [OSTI]

    Janos, Alan C. (E. Windsor, NJ); Jardin, Stephen C. (Princeton, NJ); Yamada, Masaaki (Lawrenceville, NJ)

    1987-01-01T23:59:59.000Z

    The inductively formed spheromak plasma can be maintained in a highly stable and controlled fashion. Steady-state operation is obtained by forming the plasma in the linked mode, then oscillating the poloidal and toroidal fields such that they have different phases. Preferably, the poloidal and magnetic fields are 90.degree. out of phase.

  11. Voltage regulation in linear induction accelerators

    DOE Patents [OSTI]

    Parsons, William M. (Santa Fe, NM)

    1992-01-01T23:59:59.000Z

    Improvement in voltage regulation in a Linear Induction Accelerator wherein a varistor, such as a metal oxide varistor, is placed in parallel with the beam accelerating cavity and the magnetic core. The non-linear properties of the varistor result in a more stable voltage across the beam accelerating cavity than with a conventional compensating resistance.

  12. Voltage regulation in linear induction accelerators

    DOE Patents [OSTI]

    Parsons, W.M.

    1992-12-29T23:59:59.000Z

    Improvement in voltage regulation in a linear induction accelerator wherein a varistor, such as a metal oxide varistor, is placed in parallel with the beam accelerating cavity and the magnetic core is disclosed. The non-linear properties of the varistor result in a more stable voltage across the beam accelerating cavity than with a conventional compensating resistance. 4 figs.

  13. Thyristor stack for pulsed inductive plasma generation

    SciTech Connect (OSTI)

    Teske, C.; Jacoby, J.; Schweizer, W.; Wiechula, J. [Plasmaphysics Group, Institute of Applied Physics, Johann-Wolfgang-Goethe University, 60438 Frankfurt am Main (Germany)

    2009-03-15T23:59:59.000Z

    A thyristor stack for pulsed inductive plasma generation has been developed and tested. The stack design includes a free wheeling diode assembly for current reversal. Triggering of the device is achieved by a high side biased, self supplied gate driver unit using gating energy derived from a local snubber network. The structure guarantees a hard firing gate pulse for the required high dI/dt application. A single fiber optic command is needed to achieve a simultaneous turn on of the thyristors. The stack assembly is used for switching a series resonant circuit with a ringing frequency of 30 kHz. In the prototype pulsed power system described here an inductive discharge has been generated with a pulse duration of 120 {mu}s and a pulse energy of 50 J. A maximum power transfer efficiency of 84% and a peak power of 480 kW inside the discharge were achieved. System tests were performed with a purely inductive load and an inductively generated plasma acting as a load through transformer action at a voltage level of 4.1 kV, a peak current of 5 kA, and a current switching rate of 1 kA/{mu}s.

  14. ACTIONS AND PARTIAL ACTIONS OF INDUCTIVE CONSTELLATIONS

    E-Print Network [OSTI]

    Gould, Victoria

    ACTIONS AND PARTIAL ACTIONS OF INDUCTIVE CONSTELLATIONS VICTORIA GOULD AND CHRISTOPHER HOLLINGS structure of a semigroup can be recovered from a partial order it possesses. Date: August 13, 2009. 2000 and FEDER, and also FCT post-doctoral grant SFRH/BPD/34698/2007. 1 #12;2 VICTORIA GOULD AND CHRISTOPHER

  15. Steady-state inductive spheromak operation

    DOE Patents [OSTI]

    Janos, A.C.; Jardin, S.C.; Yamada, M.

    1985-02-20T23:59:59.000Z

    The inductively formed spheromak configuration (S-1) can be maintained in a highly stable and controlled fashion. The method described eliminates the restriction to pulsed spheromak plasmas or the use of electrodes for steady-state operation, and, therefore, is a reactor-relevant formation and sustainment method.

  16. Sensorless performance evaluation of induction motors

    E-Print Network [OSTI]

    Ahmed, Shehab

    2000-01-01T23:59:59.000Z

    inertia, are seen to be crucial factors in the torque calculation process. Then, a study of saliency induced harmonics and their generation in a three phase induction motor follows. Presently, well established theory will be touched upon in order to aid...

  17. Inductive Effect of Alkyl Chains on Alcohol Dehydration at Bridge...

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

    Inductive Effect of Alkyl Chains on Alcohol Dehydration at Bridge-Bonded Oxygen Vacancies of TiO2(110). Inductive Effect of Alkyl Chains on Alcohol Dehydration at Bridge-Bonded...

  18. Excitation and control of a high-speed induction generator

    E-Print Network [OSTI]

    Englebretson, Steven Carl

    2005-01-01T23:59:59.000Z

    This project investigates the use of a high speed, squirrel cage induction generator and power converter for producing DC electrical power onboard ships and submarines. Potential advantages of high speed induction generators ...

  19. 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

  20. 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

  1. Abstract--A reliable lumped parameters model for an Inductive Coupling Device (ICD) is necessary for many reasons,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , Transcutaneous Energy Transmitters (TETs) [1], Induction Cookers, etc., are devices which use inductive link

  2. 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

  3. 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

  4. 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

  5. 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

  6. Induction Phenomena in Laser-Sustained Scramjets

    SciTech Connect (OSTI)

    Ohkawa, Yoko; Tamada, Kazunobu; Horisawa, Hideyuki [Department of Aeronautics and Astronautics, Tokai University, 1117 Kitakaname, Hiratsuka, Kanagawa, 259-1292 (Japan); Kimura, Itsuro [University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8856 (Japan)

    2005-04-27T23:59:59.000Z

    A preliminary study on induction phenomena in a laser-sustained scramjet was conducted. The induction processes include absorption process of a laser pulse by a reactive mixture, plasma formation, diffusion of active species, shock formation, thermalization process of ambient mixture, induction of local turbulence, etc. For observation of the initial phenomena, an experimental study on effects of a focused laser pulse (Nd:YAG, 335mJ/pulse, pulse width 5nsec) into a hydrogen-air mixture was conducted. Temporal evolutions of typical line spectrum of a laser-induced plasma of the mixture were measured with the photodiode or the photo-multiplier-tube through specific band-pass filters for each spectrum for OH, O+, N+, H, and O. It was shown that the emission from O abruptly increased at 2 nsec, peaked at about 5 nsec, followed by an abrupt drop at 6 nsec. The emission from H atoms secondly increased. Other emissions of N+, O+, and OH peaked at about 17 nsec and continued for about 1 msec.

  7. Total compensation of line-side switching harmonics in converter-fed ac locomotives

    SciTech Connect (OSTI)

    Krah, J.O.; Holtz, J. [Univ. of Wuppertal (Germany)] [Univ. of Wuppertal (Germany)

    1995-11-01T23:59:59.000Z

    PWM controlled line-side converters of modern ac traction locomotives inject harmonic currents into the feeding overhead line. This causes problems of electromagnetic interference. Passive or active filters are usually provided for a partial reduction of the line harmonics. A novel and superior approach employs a switched electronic compensator. It generates an exact replica of the harmonic current, feeding it to the high-voltage transformer to produce a harmonic counter MMF. The transformer main flux is then forced to be sinusoidal, and so is the induced voltage in the primary. The line current, being low-pass filtered by the transformer leakage inductance, assumes a pure sinusoidal waveform. The compensator operates in the low switching frequency range of the main power converters. Its installed power is only 1% of the traction power. Operation, control, and design considerations are described. Results from laboratory tests at full power level are presented.

  8. 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

  9. 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

  10. 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

  11. 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

  12. Superconducting inductive displacement detection of a microcantilever

    SciTech Connect (OSTI)

    Vinante, A., E-mail: anvinante@fbk.eu [Istituto di Fotonica e Nanotecnologie, CNR - Fondazione Bruno Kessler, I-38123 Povo, Trento (Italy)

    2014-07-21T23:59:59.000Z

    We demonstrate a superconducting inductive technique to measure the displacement of a micromechanical resonator. In our scheme, a type I superconducting microsphere is attached to the free end of a microcantilever and approached to the loop of a dc Superconducting Quantum Interference Device (SQUID) microsusceptometer. A local magnetic field as low as 100??T, generated by a field coil concentric to the SQUID, enables detection of the cantilever thermomechanical noise at 4.2?K. The magnetomechanical coupling and the magnetic spring are in good agreement with image method calculations assuming pure Meissner effect. These measurements are relevant to recent proposals of quantum magnetomechanics experiments based on levitating superconducting microparticles.

  13. Superconducting inductive displacement detection of a microcantilever

    E-Print Network [OSTI]

    Andrea Vinante

    2014-05-14T23:59:59.000Z

    We demonstrate a superconducting inductive technique to measure the displacement of a micromechanical resonator. In our scheme, a type I superconducting microsphere is attached to the free end of a microcantilever and approached to the loop of a dc Superconducting Quantum Interference Device (SQUID) microsusceptometer. A local magnetic field as low as 100 $\\mu$T, generated by a field coil concentric to the SQUID, enables detection of the cantilever thermomechanical noise at $4.2$ K. The magnetomechanical coupling and the magnetic spring are in good agreement with image method calculations assuming pure Meissner effect. These measurements are relevant to recent proposals of quantum magnetomechanics experiments based on levitating superconducting microparticles.

  14. Segmented ceramic liner for induction furnaces

    DOE Patents [OSTI]

    Gorin, A.H.; Holcombe, C.E.

    1994-07-26T23:59:59.000Z

    A non-fibrous ceramic liner for induction furnaces is provided by vertically stackable ring-shaped liner segments made of ceramic material in a light-weight cellular form. The liner segments can each be fabricated as a single unit or from a plurality of arcuate segments joined together by an interlocking mechanism. Also, the liner segments can be formed of a single ceramic material or can be constructed of multiple concentric layers with the layers being of different ceramic materials and/or cellular forms. Thermomechanically damaged liner segments are selectively replaceable in the furnace. 5 figs.

  15. Novel Manufacturing Technologies for High Power Induction and...

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

    High Power Induction and Permanent Magnet Electric Motors 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

  16. Inductive Inference for Solving Divergence in Knuth-Bendix Completion

    E-Print Network [OSTI]

    Thomas, M.; Jantke, K.; Proceedings of Analogical and Inductive Inference '89, Lecture Notes in Computer Science, Volume 397 pp 288-303 Springer [More Details

    Thomas,M. Jantke,K. Proceedings of Analogical and Inductive Inference '89, Lecture Notes in Computer Science, Volume 397 pp 288-303 Springer

  17. An analysis of induction motor testing techniques

    SciTech Connect (OSTI)

    Soergel, S. [Entergy Operations Inc., Killona, LA (United States)

    1996-12-31T23:59:59.000Z

    There are two main failure mechanisms in induction motors: bearing related and stator related. The Electric Power Research Institute (EPRI) conducted a study which was completed in 1985, and found that near 37% of all failures were attributed to stator problems. Another data source for motor failures is the Nuclear Plant Reliability Data System (NPRDS). This database reveals that approximately 55% of all motors were identified as being degraded before failure occurred. Of these, approximately 35% were due to electrical faults. These are the faults which this paper will attempt to identify through testing techniques. This paper is a discussion of the current techniques used to predict incipient failure of induction motors. In the past, the main tests were those to assess the integrity of the ground insulation. However, most insulation failures are believed to involve turn or strand insulation, which makes traditional tests alone inadequate for condition assessment. Furthermore, these tests have several limitations which need consideration when interpreting the results. This paper will concentrate on predictive maintenance techniques which detect electrical problems. It will present appropriate methods and tests, and discuss the strengths and weaknesses of each.

  18. 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.

  19. Direct amplitude detuning measurement with ac dipole

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

    White, S.; Maclean, E.; Tomás, 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.

  20. Induction accelerators for the phase rotator system

    SciTech Connect (OSTI)

    Reginato, Lou; Yu, Simon; Vanecek, Dave

    2001-07-30T23:59:59.000Z

    The principle of magnetic induction has been applied to the acceleration of high current beams in betatrons and a variety of induction accelerators. The linear induction accelerator (LIA) consists of a simple nonresonant structure where the drive voltage is applied to an axially symmetric gap that encloses a toroidal ferromagnetic material. The change in flux in the magnetic core induces an axial electric field that provides particle acceleration. This simple nonresonant (low Q) structure acts as a single turn transformer that can accelerate from hundreds of amperes to tens of kiloamperes, basically only limited by the drive impedance. The LIA is typically a low gradient structure that can provide acceleration fields of varying shapes and time durations from tens of nanoseconds to several microseconds. The efficiency of the LIA depends on the beam current and can exceed 50% if the beam current exceeds the magnetization current required by the ferromagnetic material. The acceleration voltage available is simply given by the expression V=A dB/dt. Hence, for a given cross section of material, the beam pulse duration influences the energy gain. Furthermore, a premium is put on minimizing the diameter, which impacts the total weight or cost of the magnetic material. The diameter doubly impacts the cost of the LIA since the power (cost) to drive the cores is proportional to the volume as well. The waveform requirements during the beam pulse makes it necessary to make provisions in the pulsing system to maintain the desired dB/dt during the useful part of the acceleration cycle. This is typically done two ways, by using the final stage of the pulse forming network (PFN) and by the pulse compensation network usually in close proximity of the acceleration cell. The choice of magnetic materials will be made by testing various materials both ferromagnetic and ferrimagnetic. These materials will include the nickel-iron, silicon steel amorphous and various types of ferrites not only to determine the properties that are essential in this application but the energy losses in the magnetization process which directly impact the cost.

  1. Induction, Domains, Calculi: Strachey's Contributions to ProgrammingLanguage

    E-Print Network [OSTI]

    Schmidt, David A.

    Induction, Domains, Calculi: Strachey's Contributions to Programming­Language Engineering David A's contributions---inductive defini­ tion of semantics, semantic­domain definitions, and calculi for semantic description---are presented, and their consequences on languages research are described. Strachey's impact

  2. Brazdil, P. and Gama, J., 1998 Constructive Induction

    E-Print Network [OSTI]

    Morik, Katharina

    1 Brazdil, P. and Gama, J., 1998 Constructive Induction on Continuous Spaces In Liu, H./Motada, H.: Feature Extraction Construction and Selection, A Data Mining Perspective. Chapter 18, pages S.289. ,,oblique") Probleme. + at2 at1 - H #12;11 Constructive Induction: "the application of a set of constructive

  3. SELECTIVE SIGNAL TRANSMISSION TO INLAID MICROCOILS BY INDUCTIVE COUPLING

    E-Print Network [OSTI]

    Wu, Jayne

    field, this problem has been approached by implanting and inductively powering a signal generator inside: (574) 631-4393, email: bernstein.1@nd.edu ABSTRACT Inductive links are widely used to power medical as a trans- cutaneous transformer, since its primary and secondary coils are physically separated

  4. A Material Theory of Induction* John D. Nortonyz

    E-Print Network [OSTI]

    assess and control the inductive risk taken in an induction by investigating the warrant for its; revised May 2003. yTo contact the author write to Department of History and Philosophy of Science to Jim Bogen for significant help. 647 Philosophy of Science, 70 (October 2003) pp. 647 ­ 670. 0031

  5. Modelling Inhibition in Metabolic Pathways Through Abduction and Induction

    E-Print Network [OSTI]

    Pazos, Florencio

    Modelling Inhibition in Metabolic Pathways Through Abduction and Induction Alireza Tamaddoni abduction and induction can be used to understand the functional class of unknown enzymes or inhibitors. We show how we can model, within Abductive Logic Programming (ALP), inhibition in metabolic pathways

  6. The PERC{trademark} process: Existing and potential applications for induction coupled plasma technology in hazardous and radioactive waste treatment

    SciTech Connect (OSTI)

    Blutke, A.S.; Vavruska, J.S.; Serino, J.F. [Plasma Technology, Inc., Santa Fe, NM (United States)

    1996-12-31T23:59:59.000Z

    Plasma Technology, Inc. (PTI), a Santa Fe, New Mexico corporation has developed the Plasma Energy Recycle and Conversion (PERC){trademark} treatment process as a safe and environmentally clean alternative to conventional thermal destruction technologies. The PERC{trademark} treatment process uses as its heat source an advanced Induction Coupled Plasma (ICP) torch connected to a reaction chamber system with an additional emission control system. For example, organic-based gas, liquid, slurry, and/or solid waste streams can be converted into usable or even salable products while residual emissions are reduced to an absolute minimum. In applications for treatment of hazardous and radioactive waste streams, the PERC system could be used for destruction of the hazardous organic constituents and/or significant waste volume reduction while capturing the radioactive fraction in a non-leachable form. Like Direct Current (DC) and Alternating Current (AC) arc plasma systems, ICP torches offer sufficient energy to decompose, melt and/or vitrify any waste stream. The decision for an arc plasma or an IC plasma system has to be made on a case by case evaluation and is highly dependent on the specific waste stream`s form and composition. Induction coupled plasma technology offers one simple, but significant difference compared to DC or AC arc plasma systems: the ICP torch is electrodeless. To date, enormous research effort has been spent to improve the lifetime of electrodes and the effectiveness of related cooling systems. Arc plasma systems are established in research laboratories worldwide and are approaching a broad use in commercial applications. ICP technology has been improved relatively recently, but nowadays offers complete new and beneficial approaches in the field of waste conversion and treatment.

  7. Induction slag reduction process for purifying metals

    DOE Patents [OSTI]

    Traut, Davis E. (Corvallis, OR); Fisher, II, George T. (Albany, OR); Hansen, Dennis A. (Corvallis, OR)

    1991-01-01T23:59:59.000Z

    A continuous method is provided for purifying and recovering transition metals such as neodymium and zirconium that become reactive at temperatures above about 500.degree. C. that comprises the steps of contacting the metal ore with an appropriate fluorinating agent such as an alkaline earth metal fluosilicate to form a fluometallic compound, and reducing the fluometallic compound with a suitable alkaline earth or alkali metal compound under molten conditions, such as provided in an induction slag metal furnace. The method of the invention is advantageous in that it is simpler and less expensive than methods used previously to recover pure metals, and it may be employed with a wide range of transition metals that were reactive with enclosures used in the prior art methods and were hard to obtain in uncontaminated form.

  8. 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...

  9. 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

  10. 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...

  11. 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...

  12. 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,...

  13. 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,...

  14. E-Print Network 3.0 - advanced induction machine Sample Search...

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

    cost compared to other generators, the induction machine offers advantages for rotating power... plants rely mostly on induction machines, because ... Source: Simes, Marcelo...

  15. Low-Oxygen Induction of Normally Cryptic psbA Genes in Cyanobacteria...

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

    Oxygen Induction of Normally Cryptic psbA Genes in Cyanobacteria. Low-Oxygen Induction of Normally Cryptic psbA Genes in Cyanobacteria. Abstract: Microarray analysis indicated...

  16. 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...

  17. 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...

  18. 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...

  19. 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

  20. 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

  1. 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

  2. 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

  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. 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

  5. Use of Slip Ring Induction Generator for Wind Power Generation

    E-Print Network [OSTI]

    K Y Patil; D S Chavan

    Wind energy is now firmly established as a mature technology for electricity generation. There are different types of generators that can be used for wind energy generation, among which Slip ring Induction generator proves to be more advantageous. To analyse application of Slip ring Induction generator for wind power generation, an experimental model is developed and results are studied. As power generation from natural sources is the need today and variable speed wind energy is ample in amount in India, it is necessary to study more beneficial options for wind energy generating techniques. From this need a model is developed by using Slip ring Induction generator which is a type of Asynchronous generator.

  6. High frequency inductive lamp and power oscillator

    DOE Patents [OSTI]

    MacLennan, Donald A. (Gaithersburg, MD); Dymond, Jr., Lauren E. (North Potomac, MD); Gitsevich, Aleksandr (Montgomery Village, MD); Grimm, William G. (Silver Spring, MD); Kipling, Kent (Gaithersburg, MD); Kirkpatrick, Douglas A. (Great Falls, VA); Ola, Samuel A. (Silver Spring, MD); Simpson, James E. (Gaithersburg, MD); Trimble, William C. (Columbia, MD); Tsai, Peter (Olney, MD); Turner, Brian P. (Damascus, MD)

    2001-01-01T23:59:59.000Z

    A high frequency inductively coupled electrodeless lamp includes an excitation coil with an effective electrical length which is less than one half wavelength of a driving frequency applied thereto, preferably much less. The driving frequency may be greater than 100 MHz and is preferably as high as 915 MHz. Preferably, the excitation coil is configured as a non-helical, semi-cylindrical conductive surface having less than one turn, in the general shape of a wedding ring. At high frequencies, the current in the coil forms two loops which are spaced apart and parallel to each other. Configured appropriately, the coil approximates a Helmholtz configuration. The lamp preferably utilizes an bulb encased in a reflective ceramic cup with a pre-formed aperture defined therethrough. The ceramic cup may include structural features to aid in alignment and I or a flanged face to aid in thermal management. The lamp head is preferably an integrated lamp head comprising a metal matrix composite surrounding an insulating ceramic with the excitation integrally formed on the ceramic. A novel solid-state oscillator preferably provides RF power to the lamp. The oscillator is a single active element device capable of providing over 70 watts of power at over 70% efficiency. Various control circuits may be employed to adjust the driving frequency of the oscillator.

  7. High frequency inductive lamp and power oscillator

    DOE Patents [OSTI]

    MacLennan, Donald A. (Gaithersburg, MD); Turner, Brian P. (Damascus, MD); Dolan, James T. (Frederick, MD); Kirkpatrick, Douglas A. (Great Falls, VA); Leng, Yongzhang (Damascus, MD)

    2000-01-01T23:59:59.000Z

    A high frequency inductively coupled electrodeless lamp includes an excitation coil with an effective electrical length which is less than one half wavelength of a driving frequency applied thereto, preferably much less. The driving frequency may be greater than 100 MHz and is preferably as high as 915 MHz. Preferably, the excitation coil is configured as a non-helical, semi-cylindrical conductive surface having less than one turn, in the general shape of a wedding ring. At high frequencies, the current in the coil forms two loops which are spaced apart and parallel to each other. Configured appropriately, the coil approximates a Helmholtz configuration. The lamp preferably utilizes an bulb encased in a reflective ceramic cup with a pre-formed aperture defined therethrough. The ceramic cup may include structural features to aid in alignment and/or a flanged face to aid in thermal management. The lamp head is preferably an integrated lamp head comprising a metal matrix composite surrounding an insulating ceramic with the excitation integrally formed on the ceramic. A novel solid-state oscillator preferably provides RF power to the lamp. The oscillator is a single active element device capable of providing over 70 watts of power at over 70% efficiency. Various control circuits may be employed to match the driving frequency of the oscillator to a plurality of tuning states of the lamp.

  8. 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

  9. 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

  10. A microfabricated ElectroQuasiStatic induction turbine-generator

    E-Print Network [OSTI]

    Steyn, J. Lodewyk (Jasper Lodewyk), 1976-

    2005-01-01T23:59:59.000Z

    An ElectroQuasiStatic (EQS) induction machine has been fabricated and has generated net electric power. A maximum power output of 192 [mu]W at 235 krpm has been measured under driven excitation of the six phases. Self ...

  11. Development of magnetic induction machines for micro turbo machinery

    E-Print Network [OSTI]

    KöĹŸ er, Hür, 1976-

    2002-01-01T23:59:59.000Z

    This thesis presents the nonlinear analysis, design, fabrication, and testing of an axial-gap magnetic induction micro machine, which is a two-phase planar motor in which the rotor is suspended above the stator via mechanical ...

  12. Reexamination of Induction Heating of Primitive Bodies in Protoplanetary Disks

    E-Print Network [OSTI]

    Menzel, Raymond L

    2013-01-01T23:59:59.000Z

    We reexamine the unipolar induction mechanism for heating asteroids originally proposed in a classic series of papers by Sonett and collaborators. As originally conceived, induction heating is caused by the "motional electric field" which appears in the frame of an asteroid immersed in a fully-ionized, magnetized solar wind and drives currents through its interior. However we point out that classical induction heating contains a subtle conceptual error, in consequence of which the electric field inside the asteroid was calculated incorrectly. The problem is that the motional electric field used by Sonett et al. is the electric field in the freely streaming plasma far from the asteroid; in fact the motional field vanishes at the asteroid surface for realistic assumptions about the plasma density. In this paper we revisit and improve the induction heating scenario by: (1) correcting the conceptual error by self consistently calculating the electric field in and around the boundary layer at the asteroid-plasma i...

  13. Case-Analysis for Rippling and Inductive Proof 

    E-Print Network [OSTI]

    Bundy, Alan; Dixon, Lucas; Johansson, Moa

    2010-01-01T23:59:59.000Z

    Rippling is a heuristic used to guide rewriting and is typically used for inductive theorem proving. We introduce a method to support case-analysis within rippling. Like earlier work, this allows goals containing if-statements to be proved...

  14. Inductive inference based on probability and Matthew Weber

    E-Print Network [OSTI]

    Osherson, Daniel

    Inductive inference based on probability and similarity Matthew Weber Princeton University Daniel in the Bayesian sense (Tentori et al., 2007), or as Weber acknowledges support from an NSF graduate research

  15. Inductive Rules, Background Knowledge, and Skepticism Daniel Steel

    E-Print Network [OSTI]

    Steel, Daniel

    Inductive Rules, Background Knowledge, and Skepticism Daniel Steel Department of Philosophy 503 S. Kedzie Hall Michigan State University East Lansing, MI 48823-1032 Email: steel@msu.edu #12;Abstract

  16. Induction machine stray loss from inter-bar currents

    E-Print Network [OSTI]

    Englebretson, Steven Carl

    2009-01-01T23:59:59.000Z

    Stray load loss refers generally to the sources of induction machine loss not accounted for by typical calculations of primary or secondary copper loss, no load core loss, or friction and windage loss. Harmonic rotor bar ...

  17. An economical single to three phase converter for induction motors

    E-Print Network [OSTI]

    Di Zerega, Philp Van Uytandaele

    1994-01-01T23:59:59.000Z

    There are several different types of single to three phase converters for induction motors available today. However, many of the presently available phase converters suffer from disadvantages such as high cost or low performance. An economical...

  18. Bloch Inductance in Small-Capacitance Josephson Junctions

    SciTech Connect (OSTI)

    Zorin, A.B. [Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig (Germany)

    2006-04-28T23:59:59.000Z

    We show that the electrical impedance of a small-capacitance Josephson junction also includes, in addition to the capacitive term -i/{omega}C{sub B}, an inductive term i{omega}L{sub B}. Similar to the known Bloch capacitance C{sub B}(q), the Bloch inductance L{sub B}(q) also depends periodically on the quasicharge, q, and its maximum value achieved at q=e(mod 2e) always exceeds the value of the Josephson inductance of this junction L{sub J}({phi}) at fixed {phi}=0. The effect of the Bloch inductance on the dynamics of a single junction and a one-dimensional array is described.

  19. Feedback regulated induction heater for a flowing fluid

    DOE Patents [OSTI]

    Migliori, A.; Swift, G.W.

    1984-06-13T23:59:59.000Z

    A regulated induction heater for heating a stream of flowing fluid to a predetermined desired temperature. The heater includes a radiofrequency induction coil which surrounds a glass tube through which the fluid flows. A heating element consisting of a bundle of approximately 200 stainless steel capillary tubes located within the glass tube couples the output of the induction coil to the fluid. The temperature of the fluid downstream from the heating element is sensed with a platinum resistance thermometer, the output of which is applied to an adjustable porportional and integral feedback control circuit which regulates the power applied to the induction coil. The heater regulates the fluid temperature to within 0.005/sup 0/C at a flow rate of 50 cm/sup 3//sec with a response time of less than 0.1 second, and can accommodate changes in heat load up to 1500 watts.

  20. Feedback regulated induction heater for a flowing fluid

    DOE Patents [OSTI]

    Migliori, Albert (Santa Fe, NM); Swift, Gregory W. (Los Alamos, NM)

    1985-01-01T23:59:59.000Z

    A regulated induction heater for heating a stream of flowing fluid to a predetermined desired temperature. The heater includes a radiofrequency induction coil which surrounds a glass tube through which the fluid flows. A heating element consisting of a bundle of approximately 200 stainless steel capillary tubes located within the glass tube couples the output of the induction coil to the fluid. The temperature of the fluid downstream from the heating element is sensed with a platinum resistance thermometer, the output of which is applied to an adjustable proportional and integral feedback control circuit which regulates the power applied to the induction coil. The heater regulates the fluid temperature to within 0.005.degree. C. at a flow rate of 50 cm.sup.3 /second with a response time of less than 0.1 second, and can accommodate changes in heat load up to 1500 watts.

  1. Heat transfer enhancement resulting from induction electrohydrodynamic pumping

    E-Print Network [OSTI]

    Margo, Bryan David

    1992-01-01T23:59:59.000Z

    HEAT TRANSFER ENHANCEMENT RESULTING FROM INDUCTION ELECTROHYDRODYNAMIC PUMPING A Thesis by BRYAN DAVID MARGO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1992 Major Subject: Mechanical Engineering HEAT TRANSFER ENHANCEMENT RESULTING FROM INDUCTION ELECTROHYDRODYNAMIC PUMPING A Thesis by BRYAN DAVID MARGO Approved as to style and content by: Jamal Seyed- Yagoobi (Chair...

  2. High-current pulses from inductive energy stores

    SciTech Connect (OSTI)

    Wipf, S.L.

    1981-01-01T23:59:59.000Z

    Superconducting inductive energy stores can be used for high power pulse supplies if a suitable current multiplication scheme is used. The concept of an inductive Marx generator is superior to a transformer. A third scheme, a variable flux linkage device, is suggested; in multiplying current it also compresses energy. Its function is in many ways analogous to that of a horsewhip. Superconductor limits indicate that peak power levels of TW can be reached for stored energies above 1 MJ.

  3. An evaluation of inductance loop detectors for speed measurement accuracy

    E-Print Network [OSTI]

    Cronin, Brian Patrick

    2012-06-07T23:59:59.000Z

    AN EVALUATION OF INDUCTANCE LOOP DETECTORS FOR SPEED MEASUREMENT ACCURACY A Thesis by BRIAN PATRICK CRONIN Submitted to the OfBce of Graduate Studies of Texas AJkM University in partial fulSllment of the requirements for the degree of MASTER... OF SCIENCE December 1994 Major Subject: Civil Engineering AN EVALUATION OF INDUCTANCE LOOP DETECTORS FOR SPEED MEASUREMENT ACCURACY A Thesis by BRIAN PATRICK CRONIN Submitted to Texas ~M University in partial fulfillment of the requirements...

  4. Linear induction accelerator and pulse forming networks therefor

    DOE Patents [OSTI]

    Buttram, Malcolm T. (Sandia Park, NM); Ginn, Jerry W. (Albuquerque, NM)

    1989-01-01T23:59:59.000Z

    A linear induction accelerator includes a plurality of adder cavities arranged in a series and provided in a structure which is evacuated so that a vacuum inductance is provided between each adder cavity and the structure. An energy storage system for the adder cavities includes a pulsed current source and a respective plurality of bipolar converting networks connected thereto. The bipolar high-voltage, high-repetition-rate square pulse train sets and resets the cavities.

  5. Optimization of induction motor efficiency: Volume 2, Single-phase induction motors: Final report

    SciTech Connect (OSTI)

    Fuchs, E.F.; Huang, H.; Vandenput, A.J.; Holl, J.; Appelbaum, J.; Zak, Z.; Erlicki, M.S.

    1987-05-01T23:59:59.000Z

    The optimal design of the motor dimensions, the capacitance of the run capacitor, the winding distribution and the choice of the electrical steel are the most important sources for an improvement of the efficiency of modern single-phase induction motors for given performance and material cost constraints. The formulation of the techniques which realize this optimization is based on nonlinear programming approaches. The Method of Boundary Search Along Active Constraints is used for the optimal design of the motor dimensions of a commercially available 2 hp, 115 V single-phase induction motor. Based on the optimization results due to the above mentioned four optimization components, the relationships between efficiency, power factor, cost, active materials and the values of the capacitance of the run capacitor are studied and the limited validity of the model law is discussed. This report also explains why the Wanlass retrofit improves efficiency and details the advantages and disadvantages of such a retrofitting as compared with the operation in the standard configuration.

  6. 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.

  7. 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...

  8. 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.

  9. 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.

  10. PU IMMOBILIZATION - INDUCTION MELTING ND OFFGAS TESTING

    SciTech Connect (OSTI)

    Marra, J

    2006-11-28T23:59:59.000Z

    The Cylindrical Induction Melter (CIM) at the Aiken County Technology Laboratory (ACTL) has been operated by the Savannah River National Laboratory (SRNL) to support the Pu Disposition Conceptual Design (CD-0) development effort. The primary purpose of this report is to summarize the offgas sampling tests conducted in the CIM to capture and analyze the particulate and vapors emitted from lanthanide borosilicate (LaBS) Frit X with HfO{sub 2} as a surrogate for PuO{sub 2} and added impurities. In addition, this report describes several initial tests of the CIM for the vitrification of LaBS Frit X with HfO{sub 2}. The activities required to produce Frit X from batch chemical oxides for subsequent milling to yield glass frit of nominally 20 micron particle size are also discussed. The tests with impurities added showed that alkali salts such as NaCl and KCl were substantially emitted into the offgas system as the salt particulate, HCl, or Cl{sub 2}. Retention of Na and K in the glass were about 80 and 55%, respectively. Chloride retention was about 35%; chloride remaining in the glass was 0.29-0.37 wt%. Based on a material balance, approximately 83% of F fed was retained in the glass at about 0.09 wt % (F could not be measured directly at this concentration). Transition metals (Ni, Cu, Fe, Mo, Cr) were also volatilized to varying extents. A very small amount (<0.1 g) of nickel compounds and KCl were found in crystals deposited on the melter offgas line. Overall, about 58-72% of the impurities added were volatilized. Virtually all of the particulate species were collected on the nominal 0.3 {micro}m filter. The particulate evolution rate ranged from 2-8 g/kg glass/h. The particulate was found to be as small as 0.2 {micro}m and have an approximate median size of 0.5 {micro}m. The particulate salt was also found to stick together by forming bridges between particles. Further runs without washable salts are recommended. Measurements of particle size distribution for use in offgas system design and tests of simple impingement devices for particle collection are also recommended for tests in the near future.

  11. 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

  12. 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...

  13. 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

  14. 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...

  15. 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

  16. 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

  17. 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

  18. 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...

  19. 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...

  20. 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...

  1. 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...

  2. 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...

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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...

  9. 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...

  10. 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...

  11. 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

  12. REEXAMINATION OF INDUCTION HEATING OF PRIMITIVE BODIES IN PROTOPLANETARY DISKS

    SciTech Connect (OSTI)

    Menzel, Raymond L.; Roberge, Wayne G., E-mail: menzer@rpi.edu, E-mail: roberw@rpi.edu [New York Center for Astrobiology and Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180 (United States)

    2013-10-20T23:59:59.000Z

    We reexamine the unipolar induction mechanism for heating asteroids originally proposed in a classic series of papers by Sonett and collaborators. As originally conceived, induction heating is caused by the 'motional electric field' that appears in the frame of an asteroid immersed in a fully ionized, magnetized solar wind and drives currents through its interior. However, we point out that classical induction heating contains a subtle conceptual error, in consequence of which the electric field inside the asteroid was calculated incorrectly. The problem is that the motional electric field used by Sonett et al. is the electric field in the freely streaming plasma far from the asteroid; in fact, the motional field vanishes at the asteroid surface for realistic assumptions about the plasma density. In this paper we revisit and improve the induction heating scenario by (1) correcting the conceptual error by self-consistently calculating the electric field in and around the boundary layer at the asteroid-plasma interface; (2) considering weakly ionized plasmas consistent with current ideas about protoplanetary disks; and (3) considering more realistic scenarios that do not require a fully ionized, powerful T Tauri wind in the disk midplane. We present exemplary solutions for two highly idealized flows that show that the interior electric field can either vanish or be comparable to the fields predicted by classical induction depending on the flow geometry. We term the heating driven by these flows 'electrodynamic heating', calculate its upper limits, and compare them to heating produced by short-lived radionuclides.

  13. 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.

  14. 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...

  15. 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.

  16. Inductive coupler for downhole components and method for making same

    DOE Patents [OSTI]

    Hall, David R.; Hall Jr., H. Tracy; Pixton, David S.; Dahlgren, Scott; Sneddon, Cameron; Fox, Joe; Briscoe, Michael A.

    2006-10-03T23:59:59.000Z

    An inductive coupler for downhole components. The inductive coupler includes an annular housing having a recess defined by a bottom portion and two opposing side wall portions. At least one side wall portion includes a lip extending toward but not reaching the other side wall portion. A plurality of generally U-shaped MCEI segments, preferably comprised of ferrite, are disposed in the recess and aligned so as to form a circular trough. The coupler further includes a conductor disposed within the circular trough and a polymer filling spaces between the segments, the annular housing and the conductor.

  17. 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.

  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. Computational analysis of temperature rise phenomena in electric induction motors

    E-Print Network [OSTI]

    Melnik, Roderick

    Computational analysis of temperature rise phenomena in electric induction motors Ying Huai Institute, University of Southern Denmark, Grundvigs Alle 150, Sonderborg, DK-6400, Denmark c Danfoss Drives A/S, Denmark Received 12 October 2002; accepted 20 December 2002 Abstract In developing electric

  20. Inductively heated particulate matter filter regeneration control system

    DOE Patents [OSTI]

    Gonze, Eugene V; Paratore Jr., Michael J; Kirby, Kevin W; Phelps, Amanda; Gregoire, Daniel J

    2012-10-23T23:59:59.000Z

    A system includes a particulate matter (PM) filter with an upstream end for receiving exhaust gas, a downstream end and zones. The system also includes a heating element. A control module selectively activates the heating element to inductively heat one of the zones.

  1. Plasma abatement of perfluorocompounds in inductively coupled plasma reactors

    E-Print Network [OSTI]

    Kushner, Mark

    Plasma abatement of perfluorocompounds in inductively coupled plasma reactors Xudong ``Peter'' Xu burn-boxes located downstream of the plasma chamber has been proposed as a method for abating PFC emissions with the goals of reducing the cost of PFC abatement and avoiding the NOx formation usually found

  2. Latent-Descriptor Clustering for Unsupervised POS Induction Michael Lamar

    E-Print Network [OSTI]

    Bienenstock, Elie

    Latent-Descriptor Clustering for Unsupervised POS Induction Michael Lamar Department of Mathematics; Lamar et al., 2010; Reichart et al., 2010; Berg-Kirkpatrick et al., 2010). Some of these methods use papers advocate non- disambiguating models (Abend et al., 2010; Lamar et al., 2010): these assign

  3. A Parametric Spectral Estimator for Faults Detection in Induction Machines

    E-Print Network [OSTI]

    Boyer, Edmond

    for fault diagnosis in electrical machines. Current spectral estimation is usually performed using classical and productivity of electrical drives. For electrical motors and generators, fault detection is usually performedA Parametric Spectral Estimator for Faults Detection in Induction Machines El Houssin El Bouchikhi

  4. Free electron laser amplifier driven by an induction linac

    SciTech Connect (OSTI)

    Neil, V.K.

    1986-06-03T23:59:59.000Z

    This paper discusses the use of a free-electron laser amplifier as a means of converting the kinetic energy of an electron beam into coherent radiation. In particular, the use of an induction linear accelerator is discussed. The motion of the elections in the tapered and untapered wiggler magnets is discussed as well as the beam emittance, and the radiation fields involved. (LSP)

  5. MODULATED INDUCTANCE MAGNETOMETERS (1) By J. E. OPFER,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    magnetometer circuit with its Thevenin equivalent circuit. The voltage generator for this circuit has an output plane vibrating near a long inductance element is described. The suitability of this magnetometer was supported in part by the U.S. Office of Naval Research. The magnetometer circuit is shown in figure 1

  6. Application of Inductive Logic Programming for Learning ECG Waveforms

    E-Print Network [OSTI]

    Alexin, Zoltán

    Application of Inductive Logic Programming for Learning ECG Waveforms Gabriella K'okai 1 , Zolt­mail: gyimi@inf.u­szeged.hu. Abstract. In this paper a learning system is presented which integrates an ECG on an attribute grammar specification of ECGs that has been transformed to Prolog. The IMPUT system combines

  7. Ethanol Tolerance Caused by slowpoke Induction in Drosophila

    E-Print Network [OSTI]

    Atkinson, Nigel

    Ethanol Tolerance Caused by slowpoke Induction in Drosophila Roshani B. Cowmeadow, Harish R in the ethanol response. Caenorhabditis elegans carrying mutations in this gene have altered ethanol sensitivity and Drosophila mutant for this gene are unable to acquire rapid tolerance to ethanol or anesthetics

  8. Novice teachers' perceptions of their first year induction program in urban schools

    E-Print Network [OSTI]

    Charleston-Cormier, Phyllis A

    2009-06-02T23:59:59.000Z

    The study examined and evaluated perceptions of first year teachers on the effectiveness of induction activities, assistance, and support following participation in their induction program. This was a quantitative study of novice teachers...

  9. Miniaturization of Inductively Coupled Plasma Sources Y. Yin, J. Messier, and J. Hopwood

    E-Print Network [OSTI]

    Miniaturization of Inductively Coupled Plasma Sources Y. Yin, J. Messier, and J. Hopwood Department associated with the miniaturization of planar inductively coupled plasmas (ICPs) are investigated" unless the plasma dimensions are determined more precisely by subtracting the sheath width from

  10. E-Print Network 3.0 - argon inductively coupled Sample Search...

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

    flow (Fig. 1a) an inductively coupled RF discharge can be stabilized inside a cooled tube (1... axial jet (right side). 1, quartz tube; 2, induction coil; 3, skin layer; 4, ......

  11. Vacuum Induction Melting Unit Induction heating is a process wherein induced eddy currents heat conductive materials. This heating

    E-Print Network [OSTI]

    Subramaniam, Anandh

    graphite) crucible inside the coil. The coil serves as the transformer primary and the part to be heated Principle: An outline of the induction melting system is presented here. A solid state RF power supply sends can be melted at a time. There are three main parts to the system: chiller, power unit and vacuum unit

  12. 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...

  13. 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

  14. AN ANALYSIS OF EARLY CAREER PRINCIPALS' EXPERIENCE WITH INDUCTION PROGRAMS AND JOB SATISFACTION.

    E-Print Network [OSTI]

    Correll, Craig Alan

    2010-05-17T23:59:59.000Z

    Characteristic of Beginning School Principals………… .. 32 4.2 How Widespread Are Induction Programs.............................................. ...37 4.3 Efect of Induction on Satisfction……………………………………. ...48 5.0 CONCLUSION…………………………………………………………………...56 5... 22 Pipalitin Inducti By Urbanicity vii LIST OF GRAPHS Graph Page 1 Induction Components by Geographic Region 44 2 ti by Urbaniity 48 1 Chapter 1 INTRODUCTION 1...

  15. Electric Vehicle Induction Motor DSVM-DTC with Torque Ripple Minimization

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Electric Vehicle Induction Motor DSVM-DTC with Torque Ripple Minimization Farid Khoucha1 a sensorless DSVM-DTC of an induction motor that propels an electrical vehicle or a hybrid one. The drive uses, as demonstrated in experimental results. Keywords: Electric vehicle (EV), induction motor, Discrete Space Vector

  16. Design and Control of the Induction Motor Propulsion of an Electric Vehicle

    E-Print Network [OSTI]

    Brest, Université de

    Design and Control of the Induction Motor Propulsion of an Electric Vehicle B. Tabbache1,2 , A for presizing the induction motor propulsion of an Electric Vehicle (EV). Based on the EV desired performances for different induction motor-based EVs using a siding mode control technique. Index Terms--Electric Vehicle (EV

  17. 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.

  18. 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

  19. 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.

  20. 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

  1. 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

  2. (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

  3. Series-counterpulse repetitive-pulse inductive storage circuit

    DOE Patents [OSTI]

    Honig, E.M.

    1984-06-05T23:59:59.000Z

    A high-power series-counterpulse repetitive-pulse inductive energy storage and transfer circuit includes an opening switch, a main energy storage coil, and a counterpulse capacitor. The local pulse is initiated simultaneously with the initiation of the counterpulse used to turn the opening switch off. There is no delay from command to output pulse. During the load pulse, the counterpulse capacitor is automatically charged with sufficient energy to accomplish the load counterpulse which terminates the load pulse and turns the load switch off. When the main opening switch is reclosed to terminate the load pulse, the counterpulse capacitor discharges through the load, causing a rapid, sharp cutoff of the load pulse as well as recovering any energy remaining in the load inductance. The counterpulse capacitor is recharged to its original condition by the main energy storage coil after the load pulse is over, not before it begins.

  4. FDTD simulation of induction heating of conducting ceramic ware

    SciTech Connect (OSTI)

    White, M.J.; Iskander, M.F.; Bringhurst, S. [Univ. of Utah, Salt Lake City, UT (United States). Electrical Engineering Dept.

    1996-12-31T23:59:59.000Z

    Induction heating for the treatment of metals has been in commercial use since the mid 1960`s. Traditional advantages of induction heating over the convection or radiation processes include speed of heating, possible energy savings, and the ability to customize the coil design to optimize the heating process. In this paper the authors used the Finite-Difference Time-Domain (FDTD) technique to simulate and analyze the induction heating process for highly conducting ceramics. In order to analyze frequency effects, simulations were performed at 300 kHz, 2 MHz, and 25 MHz. It is found that at higher frequencies coils with a pitch of 2 in. or greater became capacitive and generate a large, axial, electric-field component. This new axial electric field, in addition to the normally encountered azimuthal field, causes an improvement in the uniformity of the power deposition in the ceramic sample. If the sample occupies a large portion of the coil, uniformity may also be improved by using a variable-pitch coil, or by extending the length of the coil a few turns beyond the length of the sample. In a production-line arrangement, where multiple samples are placed inside the coil, it is shown that maximum uniformity is achieved when the samples are placed coaxially.

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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.

  14. 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

  15. 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

  16. 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

  17. 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'Ă?TRE IS TO SERVE

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

    E-Print Network [OSTI]

    de Gispert, AdriĂ 

    . 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

  19. 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

  20. 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

  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. Fission Yield Measurements by Inductively Coupled Plasma Mass-Spectrometry

    SciTech Connect (OSTI)

    Irina Glagolenko; Bruce Hilton; Jeffrey Giglio; Daniel Cummings; Karl Grimm; Richard McKnight

    2009-11-01T23:59:59.000Z

    Correct prediction of the fission products inventory in irradiated nuclear fuels is essential for accurate estimation of fuel burnup, establishing proper requirements for spent fuel transportation and storage, materials accountability and nuclear forensics. Such prediction is impossible without accurate knowledge of neutron induced fission yields. Unfortunately, the accuracy of the fission yields reported in the ENDF/B-VII.0 library is not uniform across all of the data and much of the improvement is desired for certain isotopes and fission products. We discuss our measurements of cumulative fission yields in nuclear fuels irradiated in thermal and fast reactor spectra using Inductively Coupled Plasma Mass Spectrometry.

  16. Coupling effects in inductive discharges with radio frequency substrate biasing

    SciTech Connect (OSTI)

    Schulze, J.; Schuengel, E.; Czarnetzki, U.

    2012-01-09T23:59:59.000Z

    Low pressure inductively coupled plasmas (ICP) operated in neon at 27.12 MHz with capacitive substrate biasing (CCP) at 13.56 MHz are investigated by phase resolved optical emission spectroscopy, voltage, and current measurements. Three coupling mechanisms are found potentially limiting the separate control of ion energy and flux: (i) Sheath heating due to the substrate biasing affects the electron dynamics even at high ratios of ICP to CCP power. At fixed CCP power, (ii) the substrate sheath voltage and (iii) the amplitude as well as frequency of plasma series resonance oscillations of the RF current are affected by the ICP power.

  17. Thin film coating process using an inductively coupled plasma

    DOE Patents [OSTI]

    Kniseley, Richard N. (Ames, IA); Schmidt, Frederick A. (Ames, IA); Merkle, Brian D. (Ames, IA)

    1990-01-30T23:59:59.000Z

    Thin coatings of normally solid materials are applied to target substrates using an inductively coupled plasma. Particles of the coating material are vaporized by plasma heating, and pass through an orifice to a first vacuum zone in which the particles are accelerated to a velocity greater than Mach 1. The shock wave generated in the first vacuum zone is intercepted by the tip of a skimmer cone that provides a second orifice. The particles pass through the second orifice into a second zone maintained at a higher vacuum and impinge on the target to form the coating. Ultrapure coatings can be formed.

  18. Method of processing materials using an inductively coupled plasma

    DOE Patents [OSTI]

    Hull, D.E.; Bieniewski, T.M.

    1987-04-13T23:59:59.000Z

    A method of processing materials. The invention enables ultrafine, ultrapure powders to be formed from solid ingots in a gas free environment. A plasma is formed directly from an ingot which insures purity. The vaporized material is expanded through a nozzle and the resultant powder settles on a cold surface. An inductively coupled plasma may also be used to process waste chemicals. Noxious chemicals are directed through a series of plasma tubes, breaking molecular bonds and resulting in relatively harmless atomic constituents. 3 figs.

  19. Inductively coupled plasma torch with laminar flow cooling

    DOE Patents [OSTI]

    Rayson, Gary D. (Las Cruces, NM); Shen, Yang (Las Cruces, NM)

    1991-04-30T23:59:59.000Z

    An improved inductively coupled gas plasma torch. The torch includes inner and outer quartz sleeves and tubular insert snugly fitted between the sleeves. The insert includes outwardly opening longitudinal channels. Gas flowing through the channels of the insert emerges in a laminar flow along the inside surface of the outer sleeve, in the zone of plasma heating. The laminar flow cools the outer sleeve and enables the torch to operate at lower electrical power and gas consumption levels additionally, the laminar flow reduces noise levels in spectroscopic measurements of the gaseous plasma.

  20. 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

  1. 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.

  2. E-Print Network 3.0 - adjustable inductive decoupling Sample...

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

    University of Rochester Collection: Engineering 52 Development of Induction Machines in Wind Power Stefan Soter, Member, IEEE, Ralf Wegener, Student Member, IEEE Summary: an...

  3. E-Print Network 3.0 - acclimation induction temperatures Sample...

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

    for: acclimation induction temperatures Page: << < 1 2 3 4 5 > >> 1 Journal of Thermal Biology 29 (2004) 185193 Acclimation of the temperature set-points of Summary: reserved....

  4. Thermal Protection of an Inductive Proximity Sensor Utilizing Low-Density Ceramic Composition Tile.

    E-Print Network [OSTI]

    Anger, Kim

    2010-01-01T23:59:59.000Z

    ??This thesis presents the results of a unique method for protecting inductive proximity (IP) sensors from extreme thermal exposure. The method presented in this study… (more)

  5. Injection efficiency in a cyclic induction accelerator with constant driving field

    SciTech Connect (OSTI)

    Simukhin, N.; Chakhlov, V.

    1981-10-01T23:59:59.000Z

    The injection efficeincy as a function of the accelerating voltage for injection currents of varying duration and amplitudes for the cyclic induction electron accelerator has been determined. (AIP)

  6. E-Print Network 3.0 - aphid wing induction Sample Search Results

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

    of these life history differences, stimuli leading to the induction of alternate cotton aphid... ), the green normal' morph, the yellow dwarf' ... Source: Rosenheim, Jay A....

  7. 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...

  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. 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 Hz–1 kHz range and V {sub p?p}> 8, AC osmotic fluid flow repulses the particles from electrode edges. However, in 10 kHz–10 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.

  10. Pole-phase modulated toroidal winding for an induction machine

    DOE Patents [OSTI]

    Miller, John Michael (Saline, MI); Ostovic, Vlado (Weinheim, DE)

    1999-11-02T23:59:59.000Z

    A stator (10) for an induction machine for a vehicle has a cylindrical core (12) with inner and outer slots (26, 28) extending longitudinally along the inner and outer peripheries between the end faces (22, 24). Each outer slot is associated with several adjacent inner slots. A plurality of toroidal coils (14) are wound about the core and laid in the inner and outer slots. Each coil occupies a single inner slot and is laid in the associated outer slot thereby minimizing the distance the coil extends from the end faces and minimizing the length of the induction machine. The toroidal coils are configured for an arbitrary pole phase modulation wherein the coils are configured with variable numbers of phases and poles for providing maximum torque for cranking and switchable to a another phase and pole configuration for alternator operation. An adaptor ring (36) circumferentially positioned about the stator improves mechanical strength, and provides a coolant channel manifold (34) for removing heat produced in stator windings during operation.

  11. Inductive coupler for downhole components and method for making same

    DOE Patents [OSTI]

    Hall, David R.; Hall Jr., H. Tracy; Pixton, David S.; Dahlgren, Scott; Briscoe, Michael A.; Sneddon, Cameron; Fox, Joe

    2006-05-09T23:59:59.000Z

    The present invention includes a method of making an inductive coupler for downhole components. The method includes providing an annular housing, preferably made of steel, the housing having a recess. A conductor, preferably an insulated wire, is also provided along with a plurality of generally U-shaped magnetically conducting, electrically insulating (MCEI) segments. Preferably, the MCEI segments comprise ferrite. An assembly is formed by placing the plurality of MCEI segments within the recess in the annular housing. The segments are aligned to form a generally circular trough. A first portion of the conductor is placed within the circular trough. This assembly is consolidated with a meltable polymer which fills spaces between the segments, annular housing and the first portion of the conductor. The invention also includes an inductive coupler including an annular housing having a recess defined by a bottom portion and two opposing side wall portions. At least one side wall portion includes a lip extending toward but not reaching the other side wall portion. A plurality of generally U-shaped MCEI segments, preferably comprised of ferrite, are disposed in the recess and aligned so as to form a circular trough. The coupler further includes a conductor disposed within the circular trough and a polymer filling spaces between the segments, the annular housing and the conductor.

  12. Electron energy distributions in a magnetized inductively coupled plasma

    SciTech Connect (OSTI)

    Song, Sang-Heon, E-mail: ssongs@umich.edu, E-mail: Sang-Heon.Song@us.tel.com [Department of Nuclear Engineering and Radiological Sciences, University of Michigan, 2355 Bonisteel Boulevard, Ann Arbor, Michigan 48109-2104 (United States); Yang, Yang, E-mail: yang-yang@amat.com [Applied Materials Inc., 974 E. Arques Avenue, M/S 81312, Sunnyvale, California 94085 (United States); Chabert, Pascal, E-mail: pascal.chabert@lpp.polytechnique.fr [LPP, CNRS, Ecole Polytechnique, UPMC, Paris XI, 91128 Palaiseau (France); Kushner, Mark J., E-mail: mjkush@umich.edu [Department of Electrical Engineering and Computer Science, University of Michigan, 1301 Beal Avenue, Ann Arbor, Michigan 48109-2122 (United States)

    2014-09-15T23:59:59.000Z

    Optimizing and controlling electron energy distributions (EEDs) is a continuing goal in plasma materials processing as EEDs determine the rate coefficients for electron impact processes. There are many strategies to customize EEDs in low pressure inductively coupled plasmas (ICPs), for example, pulsing and choice of frequency, to produce the desired plasma properties. Recent experiments have shown that EEDs in low pressure ICPs can be manipulated through the use of static magnetic fields of sufficient magnitudes to magnetize the electrons and confine them to the electromagnetic skin depth. The EED is then a function of the local magnetic field as opposed to having non-local properties in the absence of the magnetic field. In this paper, EEDs in a magnetized inductively coupled plasma (mICP) sustained in Ar are discussed with results from a two-dimensional plasma hydrodynamics model. Results are compared with experimental measurements. We found that the character of the EED transitions from non-local to local with application of the static magnetic field. The reduction in cross-field mobility increases local electron heating in the skin depth and decreases the transport of these hot electrons to larger radii. The tail of the EED is therefore enhanced in the skin depth and depressed at large radii. Plasmas densities are non-monotonic with increasing pressure with the external magnetic field due to transitions between local and non-local kinetics.

  13. Linear inductive voltage adders (IVA) for advanced hydrodynamic radiography

    SciTech Connect (OSTI)

    Mazarakis, M.G.; Boyes, J.D.; Johnson, D.L. [and others

    1998-09-01T23:59:59.000Z

    The electron beam which drifts through the multiple cavities of conventional induction linacs (LIA) is replaced in an IVA by a cylindrical metal conductor which extends along the entire length of the device and effectuates the addition of the accelerator cavity voltages. In the approach to radiography, the linear inductive voltage adder drives a magnetically immersed electron diode with a millimeter diameter cathode electrode and a planar anode/bremsstrahlung converter. Both anode and cathode electrodes are immersed in a strong (15--50 T) solenoidal magnetic field. The electron beam cross section is approximately of the same size as the cathode needle and generates a similar size, very intense x-ray beam when it strikes the anode converter. An IVA driven diode can produce electron beams of equal size and energy as a LIA but with much higher currents (40--50 kA versus 4--5 kA), simpler hardware and thus lower cost. The authors present here first experimental validations of the technology utilizing HERMES 3 and SABRE IVA accelerators. The electron beam voltage and current were respectively of the order of 10 MV and 40 kA. X-ray doses of up to 1 kR {at} 1 m and spot sizes as small as 1.7 mm (at 200 R doses) were measured.

  14. 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.

  15. 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

  16. 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

  17. 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

  18. 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)

  19. 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.

  20. 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...

  1. 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...

  2. 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...

  3. 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...

  4. 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...

  5. 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...

  6. 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:...

  7. 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

  8. 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

  9. 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...

  10. Induction Consolidation of Thermoplastic Composites Using Smart Susceptors

    SciTech Connect (OSTI)

    Matsen, Marc R

    2012-06-14T23:59:59.000Z

    This project has focused on the area of energy efficient consolidation and molding of fiber reinforced thermoplastic composite components as an energy efficient alternative to the conventional processing methods such as autoclave processing. The expanding application of composite materials in wind energy, automotive, and aerospace provides an attractive energy efficiency target for process development. The intent is to have this efficient processing along with the recyclable thermoplastic materials ready for large scale application before these high production volume levels are reached. Therefore, the process can be implemented in a timely manner to realize the maximum economic, energy, and environmental efficiencies. Under this project an increased understanding of the use of induction heating with smart susceptors applied to consolidation of thermoplastic has been achieved. This was done by the establishment of processing equipment and tooling and the subsequent demonstration of this fabrication technology by consolidating/molding of entry level components for each of the participating industrial segments, wind energy, aerospace, and automotive. This understanding adds to the nation's capability to affordably manufacture high quality lightweight high performance components from advanced recyclable composite materials in a lean and energy efficient manner. The use of induction heating with smart susceptors is a precisely controlled low energy method for the consolidation and molding of thermoplastic composites. The smart susceptor provides intrinsic thermal control based on the interaction with the magnetic field from the induction coil thereby producing highly repeatable processing. The low energy usage is enabled by the fact that only the smart susceptor surface of the tool is heated, not the entire tool. Therefore much less mass is heated resulting in significantly less required energy to consolidate/mold the desired composite components. This energy efficiency results in potential energy savings of {approx}75% as compared to autoclave processing in aerospace, {approx}63% as compared to compression molding in automotive, and {approx}42% energy savings as compared to convectively heated tools in wind energy. The ability to make parts in a rapid and controlled manner provides significant economic advantages for each of the industrial segments. These attributes were demonstrated during the processing of the demonstration components on this project.

  11. Cold-Crucible Induction Melter Design and Development

    SciTech Connect (OSTI)

    Gombert, Dirk; Richardson, John R. [Bechtel BWXT Idaho, LLC (United States)

    2003-03-15T23:59:59.000Z

    The international process for immobilization of high-activity waste from aqueous fuel reprocessing is vitrification. In the United States joule-heated melter technology has been implemented at West Valley and the Savannah River Site, but improved melter concepts are sought to bring down the costs of processing. The cold-crucible induction melter (CCIM) design is being evaluated for many applications, including radioactive wastes because it eliminates many materials and operating constraints inherent in the baseline technology. The cold-crucible design is also smaller, less expensive, and generates much less waste for ultimate disposal. In addition, it should allow a much more flexible operating envelope, which will be crucial if the heterogeneous wastes at the U.S. Department of Energy (DOE) reprocessing sites are to be vitrified.A joule-heated melter operates by passing current between water-cooled electrodes through a molten pool in a refractory-lined chamber. This design is inherently limited by susceptibility of materials to corrosion and melting. In addition, redox conditions and free metal content have exacerbated materials problems or lead to electrical short-circuiting causing failures in developmental DOE melters. In contrast, the CCIM design is based on inductive coupling of a water-cooled high-frequency electrical coil with the glass, causing eddy currents that produce heat and mixing.While significant marketing claims have been made by technology suppliers and developers, little data is available for engineering and economic evaluation of the technology, and no facilities are available in the United States to support testing. In addition to verifying the capabilities of the technology, further development can exploit opportunities for optimization through better understanding of the electromagnetic thermal phenomena intrinsic to the cold-crucible melter. Induction frequency, applied power, and coil and crucible configuration are all related but independent variables that can be explored to optimize throughput while designing a system for maximum reliability in a remote environment. This paper is an introduction to the technology as it applies to vitrification of materials not electrically conductive at ambient temperatures, the potential for research improvements, and the new system being built at the Idaho National Engineering and Environmental Laboratory.

  12. Visualization and Animation of Inverter-Driven Induction Motor A. P. Sakis Meliopoulos, W. Gao

    E-Print Network [OSTI]

    1 Visualization and Animation of Inverter-Driven Induction Motor Operation A. P. Sakis Meliopoulos of South Carolina Columbia, SC 29208 Abstract: This paper discusses a new model of an inverter- driven induction motor that enables direct animation and visualization of the inverter and motor operation

  13. A Loss-Minimization DTC Scheme for EV Induction Motors A. Haddoun1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of an induction motor propelling and Electric Vehicle (EV). The proposed control strategy, based on a Direct Flux, among EV's motor electric propulsion features; the energy efficiency is a basic characteristic and the performance of the proposed control approach. Index Terms--Electric vehicle, induction motor, DTC, loss

  14. Low-Cost Single-Phase Powered Induction Machine Drive for Residential Applications

    E-Print Network [OSTI]

    Chapman, Patrick

    , and lifetime. Keywords-induction motor; harmonic elimination; power factor correction; efficiency; low cost of the motors are less than 1 hp in size, and account for approximately 10% of the electricity consumed by the electric motor population [1]. These fractional horsepower motors are primarily single- phase induction

  15. A Laboratory Method For Measuring The Ozone Emission From In-duct Air Cleaners.

    E-Print Network [OSTI]

    Siegel, Jeffrey

    : Emission rate, HVAC air cleaners, electrostatic precipitators, coronas, standard test method 1 Introduction Subchapter 8.7). However, in-duct air cleaners including electronic air cleaners, electrostatic precipitators of an ozone analyzer. Viner et al. (1992) studied commercial in-duct electrostatic precipitators and observed

  16. Field-reversed configuration formation scheme utilizing a spheromak and solenoid induction

    E-Print Network [OSTI]

    Ji, Hantao

    Field-reversed configuration formation scheme utilizing a spheromak and solenoid induction S. P FRC formation technique is described, where a spheromak transitions to a FRC with inductive current are suppressed; spheromaks with a lighter majority species, such as neon and helium, either display a terminal

  17. H-G Diagram Based Rotor Parameters Identification for Induction Motors Thermal Monitoring

    E-Print Network [OSTI]

    Brest, Université de

    H-G Diagram Based Rotor Parameters Identification for Induction Motors Thermal Monitoring Mohamed: In this paper, an effective on-line method for induction motor parameter identification, especially rotor for each operating point. Computer simulations and experimental tests, carried out for a 4-kW four

  18. Radiation transport coupled particle-in-cell simulation of low-pressure inductive discharges

    E-Print Network [OSTI]

    Lee, Hae June

    Radiation transport coupled particle-in-cell simulation of low-pressure inductive discharges Hae driven by an inductive radio frequency wave are simulated with a one-dimensional radiation transport is self-consistently coupled with plasma dynamics. The radiation efficiency is investigated

  19. Modelling and Analysis of Variable Speed Wind Turbines with Induction Generator during Grid

    E-Print Network [OSTI]

    Hansen, René Rydhof

    Modelling and Analysis of Variable Speed Wind Turbines with Induction Generator during Grid Fault Wind Turbines with Induction Generator during Grid Fault by Sigrid M. Bolik Institute of Energy turbine technology has undergone rapid developments. Growth in size and the optimization of wind turbines

  20. Induction welding and heat treatment of steel pipes: evolution of crystallographic texture

    E-Print Network [OSTI]

    Cambridge, University of

    Induction welding and heat treatment of steel pipes: evolution of crystallographic texture detrimental to toughness P. Yan*1 , O¨. E. Gu¨ngo¨r2 , P. Thibaux2 and H. K. D. H. Bhadeshia1 Steel welding using induction heating to produce pipelines is found to have lower toughness at the weld junction than

  1. PWM Inverter-Fed Induction Motor-Based Electrical Vehicles Fault-Tolerant Control

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    PWM Inverter-Fed Induction Motor-Based Electrical Vehicles Fault-Tolerant Control Bekheďra Tabbache proposes a fault-tolerant control scheme for PWM inverter-fed induction motor-based electric vehicles and simulations on an electric vehicle are carried-out using a European urban driving cycle to assess the FTC

  2. SDTC-EKF Control of an Induction Motor Based Electric Vehicle B. Tabbache1,2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    SDTC-EKF Control of an Induction Motor Based Electric Vehicle B. Tabbache1,2 , A. Kheloui2 , M torque control of an induction motor based electric vehicle. In this case, stator flux and rotational for an electric vehicle control. Keywords: Sensorless Direct Torque Control (SDTC), Extented Kalman Filter (EKF

  3. RecA-mediated SOS induction requires an extended filament conformation but no ATP hydrolysis

    E-Print Network [OSTI]

    Cox, Michael M.

    RecA-mediated SOS induction requires an extended filament conformation but no ATP hydrolysis filament on single-stranded DNA and hydrolyzes ATP. The RecA K72R (recA2201) muta- tion eliminates in the presence of ATP. Strains with this mutation do not undergo SOS induction in vivo. We have combined the K72R

  4. Independent Control of Two Induction Motors Fed by a Five Legs PWM Inverter for Electric Vehicles

    E-Print Network [OSTI]

    Boyer, Edmond

    Independent Control of Two Induction Motors Fed by a Five Legs PWM Inverter for Electric Vehicles B. NOMENCLATURE EV = Electric vehicle; IM = Induction motor; IFOC = Indirect field oriented control; PWM= Pulse force; Fcr = Climbing and downgrade resistance force; Pv = Vehicle driving power; J = Total inertia

  5. A Microfabricated Inductively-Coupled Plasma Generator Department of Electrical and Computer Engineering,

    E-Print Network [OSTI]

    of the supplied power. This mechanism of RF plasma generation is referred to as capacitive coupling. Electrodeless generation7 . The inductively-coupled plasma (ICP) is one type of electrodeless discharge that is now widelyA Microfabricated Inductively-Coupled Plasma Generator J. Hopwood Department of Electrical

  6. Performance Optimization Criteria for Pulsed Inductive Plasma Acceleration Kurt A. Polzin

    E-Print Network [OSTI]

    Choueiri, Edgar

    Performance Optimization Criteria for Pulsed Inductive Plasma Acceleration Kurt A. Polzin and Edgar Y. Choueiri Electric Propulsion and Plasma Dynamics Laboratory (EPPDyL) Mechanical and Aerospace A model of pulsed inductive plasma thrusters consisting of a set of coupled circuit equations and a one

  7. Dynamic Phasor Modeling of the Doubly-Fed Induction Machine in Generator Operation Emmanuel Delaleau*

    E-Print Network [OSTI]

    Stankoviæ, Aleksandar

    Dynamic Phasor Modeling of the Doubly-Fed Induction Machine in Generator Operation Emmanuel at variable speed; second, the excitation power electronics converter feeding the rotor windings needs of the doubly- fed induction machine in generator operation using dynamic phasors. This concept is coming from

  8. Direct Simulation Monte Carlo of Inductively Coupled Plasma and Comparison with Experiments

    E-Print Network [OSTI]

    Economou, Demetre J.

    Direct Simulation Monte Carlo of Inductively Coupled Plasma and Comparison with Experiments Justine of Chemical Engineering, University of Houston, Houston, Texas 77204-4 792, USA ABSTRACT Direct simulation-density inductively coupled reactor with chlorine (electronegative) chemistry. Electron density and temperature were

  9. An Advanced Induction Machine Model for Predicting Inverter-Machine Interaction

    E-Print Network [OSTI]

    Chapman, Patrick

    An Advanced Induction Machine Model for Predicting Inverter-Machine Interaction [31 [41 [51 [6] [7 saturntion d d d d d d d d d d d d d d d d d d d d d d d Leakage inductance saturation as a function of flux- tion machine model specifically designed for use with inverter models to study machin

  10. Induction Motors Bearing Failures Detection and Diagnosis: Park and Concordia Transform

    E-Print Network [OSTI]

    Boyer, Edmond

    to metallurgical damage from interrupted electrical current flow. Increased noise and vibration are typicalInduction Motors Bearing Failures Detection and Diagnosis: Park and Concordia Transform Approaches with the problem of bearing failure detection and diagnosis in induction motors. Indeed, bearings deterioration

  11. Mechanical fault detection in induction motor drives through stator current monitoring -Theory

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    vibrations lead to acoustic noise, noise monitoring is also a possible approach. However, these methods0 Mechanical fault detection in induction motor drives through stator current monitoring - Theory machines are a key element in many electrical systems. Amongst all types of electric motors, induction

  12. Element for use in an inductive coupler for downhole components

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Fox, Joe (Spanish Fork, UT)

    2009-03-31T23:59:59.000Z

    An element for use in an inductive coupler for downhole components comprises an annular housing having a generally circular recess. The element further comprises a plurality of generally linear, magnetically conductive segments. Each segment includes a bottom portion, an inner wall portion, and an outer wall portion. The portions together define a generally linear trough from a first end to a second end of each segment. The segments are arranged adjacent to each other within the housing recess to form a generally circular trough. The ends of at least half of the segments are shaped such that the first end of one of the segments is complementary in form to the second end of an adjacent segment. In one embodiment, all of the ends are angled. Preferably, the first ends are angled with the same angle and the second ends are angled with the complementary angle.

  13. Matrix effects in inductively coupled plasma mass spectrometry

    SciTech Connect (OSTI)

    Chen, Xiaoshan

    1995-07-07T23:59:59.000Z

    The inductively coupled plasma is an electrodeless discharge in a gas (usually Ar) at atmospheric pressure. Radio frequency energy generated by a RF power source is inductively coupled to the plasma gas through a water cooled load coil. In ICP-MS the {open_quotes}Fassel{close_quotes} TAX quartz torch commonly used in emission is mounted horizontally. The sample aerosol is introduced into the central flow, where the gas kinetic temperature is about 5000 K. The aerosol is vaporized, atomized, excited and ionized in the plasma, and the ions are subsequently extracted through two metal apertures (sampler and skimmer) into the mass spectrometer. In ICP-MS, the matrix effects, or non-spectroscopic interferences, can be defined as the type of interferences caused by dissolved concomitant salt ions in the solution. Matrix effects can be divided into two categories: (1) signal drift due to the deposition of solids on the sampling apertures; and/or (2) signal suppression or enhancement by the presence of the dissolved salts. The first category is now reasonably understood. The dissolved salts, especially refractory oxides, tend to deposit on the cool tip of the sampling cone. The clogging of the orifices reduces the ion flow into the ICP-MS, lowers the pressure in the first stage of ICP-MS, and enhances the level of metal oxide ions. Because the extent of the clogging increases with the time, the signal drifts down. Even at the very early stage of the development of ICP-MS, matrix effects had been observed. Houk et al. found out that the ICP-MS was not tolerant to solutions containing significant amounts of dissolved solids.

  14. 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

  15. A Generalized Class of Stationary Frame-Current Controllers for Grid-Connected AC–DC Converters

    E-Print Network [OSTI]

    Hwang, J. George

    Within power systems, high-power pulsewidth-modulated ac-dc converters are used in flexible ac transmission systems controllers and for interfacing renewable energy sources to the grid. These converters traditionally ...

  16. 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.

  17. 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

  18. 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.

  19. 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

  20. 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

  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. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. * 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

  10. 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

  11. 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

  12. 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

  13. Sensor Fault-Tolerant Control of an Induction Motor Based Electric Vehicle Bekhera Tabbache1,2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Sensor Fault-Tolerant Control of an Induction Motor Based Electric Vehicle Bekheďra Tabbache1://www.lbms.fr Keywords Electric Vehicle (EV), Induction motor, Sensor fault, Fault-tolerant control (FTC), Direct torque a reconfigurable direct torque control of an induction motor-based electric vehicle. The proposed strategy concerns

  14. UBC Social Ecological Economic Development Studies (SEEDS) Student Report An Introduction into Induction and Natural Gas Stoves

    E-Print Network [OSTI]

    into Induction and Natural Gas Stoves: A Triple Bottom Line Analysis for the new Student Union Building Jordan Ho of a project/report". #12;APSC 262 An Introduction Into Induction and Natural Gas Stoves A triple-bottom line, 2011 #12;Page 2 of 21 ABSTRACT This report compares the attributes of induction and natural gas stoves

  15. 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.

  16. 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

  17. 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

  18. 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

  19. Tuning the DARHT Axis-II linear induction accelerator focusing

    SciTech Connect (OSTI)

    Ekdahl, Carl A. [Los Alamos National Laboratory

    2012-04-24T23:59:59.000Z

    Flash radiography of large hydrodynamic experiments driven by high explosives is a well-known diagnostic technique in use at many laboratories, and the Dual-Axis Radiography for Hydrodynamic Testing (DARHT) facility at Los Alamos produces flash radiographs of large hydrodynamic experiments. Two linear induction accelerators (LIAs) make the bremsstrahlung radiographic source spots for orthogonal views of each test. The 2-kA, 20-MeV Axis-I LIA creates a single 60-ns radiography pulse. The 1.7-kA, 16.5-MeV Axis-II LIA creates up to four radiography pulses by kicking them out of a longer pulse that has a 1.6-{mu}s flattop. The Axis-II injector, LIA, kicker, and downstream transport (DST) to the bremsstrahlung converter are described. Adjusting the magnetic focusing and steering elements to optimize the electron-beam transport through an LIA is often called 'tuning.' As in all high-current LIAs, the focusing field is designed to be as close to that of the ideal continuous solenoid as physically possible. In ideal continuous solenoidal transport a smoothly varying beam size can easily be found for which radial forces balance, and the beam is said to be 'matched' to the focusing field. A 'mismatched' beam exhibits unwanted oscillations in size, which are a source of free energy that contributes to emittance growth. This is undesirable, because in the absence of beam-target effects, the radiographic spot size is proportional to the emittance. Tuning the Axis-II LIA is done in two steps. First, the solenoidal focusing elements are set to values designed to provide a matched beam with little or no envelope oscillations, and little or no beam-breakup (BBU) instability growth. Then, steering elements are adjusted to minimize the motion of the centroid of a well-centered beam at the LIA exit. This article only describes the design of the tune for the focusing solenoids. The DARHT Axis-II LIA was required to be re-tuned after installing an accelerator cell to replace a failed solenoid in March of 2012. We took advantage of this opportunity to improve the design of the focusing tune with better models of the remaining partially failed solenoids, better estimates of beam initial conditions, and better values for pulsed-power voltages. As with all previous tunes for Axis-II, this one incorporates measures to mitigate beam-breakup (BBU) instability, image displacement instability (IDI), corkscrew (sweep), and emittance growth. Section II covers the general approach to of design of focusing solenoid tunes for the DARHT Axis-2 LIA. Section III explains the specific requirements and simulations needed to design the tune for the injector, which includes the thermionic electron source, diode, and six induction cells. Section IV explains the requirements and simulations for tuning the main accelerator, which consists of 68 induction cells. Finally, Section V explores sensitivity of the tune to deviations of parameters from nominal, random variations, and uncertainties in values. Four appendices list solenoid settings for this new tune, discuss comparisons of different simulation codes, show halo formation in mismatched beams, and present a brief discussion of the beam envelope equation, which is the heart of the method used to design LIA solenoid tunes.

  20. Reversing-counterpulse repetitive-pulse inductive storage circuit

    DOE Patents [OSTI]

    Honig, E.M.

    1984-06-05T23:59:59.000Z

    A high power reversing-counterpulse repetitive-pulse inductive storage and transfer circuit includes an opening switch, a main energy storage coil, a counterpulse capacitor and a small inductor. After counterpulsing the opening switch off, the counterpulse capacitor is recharged by the main energy storage coil before the load pulse is initiated. This gives the counterpulse capacitor sufficient energy for the next counterpulse operation, although the polarity of the capacitor's voltage must be reversed before that can occur. By using a current-zero switch as the counterpulse start switch, the capacitor is disconnected from the circuit (with a full charge) when the load pulse is initiated, preventing the capacitor from depleting its energy store by discharging through the load. After the load pulse is terminated by reclosing the main opening switch, the polarity of the counterpulse capacitor voltage is reversed by discharging the capacitor through a small inductor and interrupting the discharge current oscillation at zero current and peak reversed voltage. The circuit enables high-power, high-repetition-rate operation with reusable switches and features total control (pulse-to-pulse) over output pulse initiation, duration, repetition rate, and, to some extent, risetime.

  1. Design of a superconducting 20 MJ induction heating coil

    SciTech Connect (OSTI)

    Singh, S.K.; Ibrahim, E.A.; Gaberson, P.C.; Eckels, P.W.; Jarabak, A.J.; Rogers, J.D.; Thullen, P.; Walker, M.S.

    1980-01-01T23:59:59.000Z

    A pancake-wound, low-loss, superconducting, induction-heating coil has been designed to demonstrate the feasibility of superconducting polaidal system for the Tokamak reactors, to provide confidence in application of superconductivity to actual reactors, and to provide the opportunity to solve specific engineering problems to support the fusion pulsed coil program. the coil is designed to store 20 MJ at 50 kA. The superconductor material is NbTi for a 7.5 tesla maximum field. The coil is designed to survive at least 100,000 cycles of full bipolar half cycle sinusoidal operation from +7.5 tesla to -7.5 telsa fields in one second. The coil is natural convection immersion-cooled at 4.5/sup 0/K in liquid helium bath. The design demonstrates confidence in an advanced design, low-loss, cryostable conductor, along with safety, reliability and the operating life of the coil of more than 100,000 cycles.

  2. Transport of dust particles in inductively coupled discharges

    SciTech Connect (OSTI)

    Hwang, H.H.; Ventzek, P.L.G.; Hoekstra, R.; Kushner, M.J. [Univ. of Illinois, Urbana, IL (United States). Dept. of Electrical and Computer Engineering

    1994-12-31T23:59:59.000Z

    Contamination by particulates, or ``dust``, in plasma processing reactors decreases the yield of microelectronic components. In low temperature plasmas, such as those used in etching or deposition reactors to fabricate semiconductor devices, the particles can form to appreciable densities. These particles can be trapped or expelled from the reactor, depending on which forces dominate their transport. Quantities that affect dust motion in Inductively Coupled Plasma (ICP) discharges are the charge of the dust particles (electrostatic forces), momentum transfer with ions (viscous ion-drag forces), temperature gradients from heated electrodes (thermophoretic forces), and gas flow (fluid drag forces). The authors have developed a 2-D Monte Carlo simulation to investigate the trajectories of dust particles in ICP reactors. The model may have an arbitrary number and variety of dust species, and different gas mixtures may be used. The self-consistent electric fields, ion energy distributions, and species densities are imported from a companion Monte Carlo-fluid hybrid model. A semi-analytic model is used to determine the dust charge as well as the momentum transfer cross sections between dust and ions. The electrode topography can also affect the trapping locations of dust. Grooves on the electrodes perturb electrical forces and heated washers can change the thermophoretic forces; hence the spatial dust density varies from the case with a smooth, nonheated electrode. These effects on particle trapping will be presented. Other factors on trapping locations, such as dust particle size and varying power flow with time, will also be discussed.

  3. Standard guide for mutual inductance bridge applications for wall thickness determinations in boiler tubing

    E-Print Network [OSTI]

    American Society for Testing and Materials. Philadelphia

    2010-01-01T23:59:59.000Z

    1.1 This guide describes a procedure for obtaining relative wall thickness indications in ferromagnetic and non-ferromagnetic steels using the mutual inductance bridge method. The procedure is intended for use with instruments capable of inducing two substantially identical magnetic fields and noting the change in inductance resulting from differing amounts of steel. It is used to distinguish acceptable wall thickness conditions from those which could place tubular vessels or piping at risk of bursting under high temperature and pressure conditions. 1.2 This guide is intended to satisfy two general needs for users of industrial Mutual Inductance Bridge (MIB) equipment: (1) the need for a tutorial guide addressing the general principles of Mutual Inductance Bridges as they apply to industrial piping; and (2) the need for a consistent set of MIB performance parameter definitions, including how these performance parameters relate to MIB system specifications. Potential users and buyers, as well as experienced M...

  4. Identifying Markov Blankets with Decision Tree Induction PrePublication Version

    E-Print Network [OSTI]

    Fisher, Douglas H.

    1 Identifying Markov Blankets with Decision Tree Induction PrePublication Version Lewis Frey Frey Blankets consist of strongly relevant features as defined in relation to optimal classifiers (Kohavi & John

  5. Numerical analysis and thermographic investigation of induction heating Matej Kranjc, Anze Zupanic *, Damijan Miklavcic, Tomaz Jarm

    E-Print Network [OSTI]

    Ljubljana, University of

    Thermography a b s t r a c t Induction heating process was investigated numerically and experimentally, a non-contact measurement method based on thermography can be used. Thermography is a form of infrared

  6. Harmonic control of multiple-stator induction machines for voltage regulation

    E-Print Network [OSTI]

    Holloway, Jack Wade, 1980-

    2004-01-01T23:59:59.000Z

    Small, one to a few horsepower, three-phase induction machines with three sets of electrically-isolated, magnetically-coupled stator winding circuits are described. A voltage inverter is developed and used to drive one set ...

  7. Analysis of electromechanical interactions in a flywheel system with a doubly fed induction machine

    E-Print Network [OSTI]

    Ran, Li

    This paper analyzes the electromechanical inter-action in a flywheel system with a doubly fed induction machine, used for wind farm power smoothing or grid frequency response control. The grid-connected electrical machine ...

  8. Experimental time-domain controlled source electromagnetic induction for highly conductive targets detection and discrimination

    E-Print Network [OSTI]

    Benavides Iglesias, Alfonso

    2007-09-17T23:59:59.000Z

    The response of geological materials at the scale of meters and the response of buried targets of different shapes and sizes using controlled-source electromagnetic induction (CSEM) is investigated. This dissertation focuses on three topics; i) frac...

  9. What Stator Current Processing Based Technique to Use for Induction Motor Rotor Faults Diagnosis?

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    drives in central power plants of power systems, as well as restricted role in low MVA power supply systems as induction generators, mining industries, petrochemical industries, as well as in aerospace

  10. Double active shielded magnetic field gradient design with minimum inductance method

    E-Print Network [OSTI]

    Wang, Xu

    1992-01-01T23:59:59.000Z

    DOUBLE ACTIVE SHIELDED MAGNETIC FIELD GRADIENT DESIGN WITH MINIMUM INDUCTANCE METHOD A Thesis by XU WANG Submitted to the Oflice of Graduate Studies of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1992 Major Subject: Physics DOUBLE ACTIVE SHIELDED MAGNETIC FIELD GRADIENT DESIGN WITH MINIMUM INDUCTANCE METHOD A Thesis by XU WANG Approved as to style and content by: F. R. Huson (Chair of Committee) Steve Wry (Member) Edward...

  11. Forward Modeling of the Induction Log Response of a Fractured Geologic Formation

    E-Print Network [OSTI]

    Bray, Steven Hunter

    2013-05-02T23:59:59.000Z

    3.1 Layered Earth Model The environment used for the induction log simulations is a layered Earth model. The model consists of six layers that are assigned different thicknesses and conductivities based on the desired induction log... Tx-Rx pair has a fixed separation and is moved along a vertical profile through the subsurface taking measurements at predetermined logging points. 20 The second change to the original Seatem code involves the surrounding environment. The code...

  12. The induction of toxin neutralizing antibodies to Clostridium perfringens types C and D toxins in horses

    E-Print Network [OSTI]

    Brooks, Frances Lynn

    2012-06-07T23:59:59.000Z

    THE INDUCTION OF TOXIN NEUTRALIZING ANTIBODIES TO CLOSTRIDIUM PERFRINGENS TYPES C AND D TOXINS IN HORSES A Thes1s by FRANCES LYNN BROOKS Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 1983 Major Subject: Veterinary Microbiology THE INDUCTION OF TOXIN NEUTRALIZING ANTIBODIES TO CLOSTRIDIUN PERFRINGENS TYPES C AND D TOXINS IN HORSES A Thesis by FRANCES LYNN BROOKS Approved as to style...

  13. 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.

  14. 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.

  15. 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.

  16. 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).

  17. 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.

  18. 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.

  19. 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.

  20. 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 ...

  1. 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.

  2. 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...

  3. 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...

  4. 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 ...

  5. 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...

  6. 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.

  7. 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...

  8. 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

  9. 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...

  10. 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...

  11. 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...

  12. 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. ...

  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. 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...

  15. 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

  16. 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...

  17. 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...

  18. 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

  19. 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...

  20. 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...

  1. 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

  2. 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. ...

  3. 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

  4. 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...

  5. 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...

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. @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

  12. 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

  13. 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.

  14. 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.

  15. Evolutionary Test Program Induction for Microprocessor Design Verification Fulvio Corno, Gianluca Cumani, Matteo Sonza Reorda, Giovanni Squillero

    E-Print Network [OSTI]

    Fernandez, Thomas

    Evolutionary Test Program Induction for Microprocessor Design Verification Fulvio Corno, Gianluca is an assembly program able to maximize a predefined verification metric. Design verification of on-chip

  16. 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.

  17. 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.

  18. 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.

  19. Collisionless electron heating by radio frequency bias in low gas pressure inductive discharge

    SciTech Connect (OSTI)

    Lee, Hyo-Chang; Chung, Chin-Wook [Department of Electrical Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of)

    2012-12-10T23:59:59.000Z

    We show experimental observations of collisionless electron heating by the combinations of the capacitive radio frequency (RF) bias power and the inductive power in low argon gas pressure RF biased inductively coupled plasma (ICP). With small RF bias powers in the ICP, the electron energy distribution (EED) evolved from bi-Maxwellian distribution to Maxwellian distribution by enhanced plasma bulk heating and the collisionless sheath heating was weak. In the capacitive RF bias dominant regime, however, high energy electrons by the RF bias were heated on the EEDs in the presence of the ICP. The collisionless heating mechanism of the high energy electrons transited from collisionless inductive heating to capacitive coupled collisionless heating by the electron bounce resonance in the RF biased ICP.

  20. 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

  1. E-Print Network 3.0 - ac adjustable speed Sample Search Results

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

    speed wind turbine concept 50 4.1 Variable speed wind turbine... of a variable speed wind turbine with DFIG 54 4.4 Doubly-fed induction generator control 57 4.4.1 System......

  2. E-Print Network 3.0 - adjustable speed ac Sample Search Results

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

    speed wind turbine concept 50 4.1 Variable speed wind turbine... of a variable speed wind turbine with DFIG 54 4.4 Doubly-fed induction generator control 57 4.4.1 System......

  3. Method and apparatus for monitoring the rotating frequency of de-energized induction motors

    DOE Patents [OSTI]

    Mikesell, H.E.; Lucy, E.

    1998-02-03T23:59:59.000Z

    The rotational speed of a coasting induction motor is measured by sensing e residual electrical voltages at the power terminals of the motor, thus eliminating the need for conventional tachometer equipment, additional mechanical components or modifications to the induction motor itself. The power terminal voltage signal is detected and transformed into a DC voltage proportional to the frequency of the signal. This DC voltage can be input to the control system of a variable frequency motor controller to regulate the output characteristics thereof relative to the speed of the coasting motor. 6 figs.

  4. The development of a model system to monitor induction of an enzyme in Saccharomyces cerevisiae

    E-Print Network [OSTI]

    Wilkerson, James Edward

    1979-01-01T23:59:59.000Z

    . Whole cells exhibited a ten-fold induction in strain X2180-18 and a six-fold induction in spheroplasts of o-131-20. Enzyme kinetics were determined with purified alkaline phospha- tase. When p-nitrophenyl phosphate was used as substrate, the Km... of ? 1 -1 the purified enzyme was 13 n mole min mg and the pH optimum was -1 -1 8. 5. The Km was 2 n mole min mg and the pH optimum was 8. 1 when sodium o-napthyl acid phosphate was utilized as substrate. Electrophoresis, followed by incubation...

  5. 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.

  6. A Fuzzy-Based Strategy to Improve Control Reconfiguration Performance of a Sensor Fault-Tolerant Induction Motor Propulsion

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    recovery in the Electric (EV) or Hybrid Electric Vehicle (HEV) induction motor drive. To achieve this goal-ref · Fault Tolerant Controller HybridHybrid ElectricElectric VehicleVehicle Induction Motor Sensorless Fuzzy) and the minimization of the size and the weight of the motor and the drive. All these aspect call for an efficiency

  7. Improvement of low speed induction generator performances and reducing the power of excitation and voltage control system

    SciTech Connect (OSTI)

    Budisan, N. [Politechnica Univ. of Timisoara (Romania); Hentea, T.; Mahil, S. [Purdue Univ. Calumet, Hammond, IN (United States); Madescu, G. [Romanian Academy, Timisoara (Romania)

    1996-12-31T23:59:59.000Z

    In this paper we present the results of our investigations concerning the utilization of induction generators at very low speed. It is shown that, by proper design, it is possible to obtain high efficiency and high power factor values. The optimized induction generators require lower reactive power resulting in lower size and price of the excitation control system. 4 refs., 2 figs.

  8. Abstract--In doubly fed induction generator (DFIG) based wind energy conversion systems (WECS), the DFIG is interfaced to the

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    a popular candidate in the wind energy conversion systems (WECS) due to its advantages [2-5]. When compared with fixed-speed induction generators, the DFIG has the advantages of maximum power capture, less mechanicalAbstract--In doubly fed induction generator (DFIG) based wind energy conversion systems (WECS

  9. Machine Induction of Geospatial P A Whigham1, R I McKay2 & J R Davis1

    E-Print Network [OSTI]

    Fernandez, Thomas

    Machine Induction of Geospatial Knowledge P A Whigham1, R I McKay2 & J R Davis1 1CSIRO Division the implications of inductive techniques applied to geospatial data in a logical framework. It is argued trivial of cases. A heavily constrained geospatial domain, topographic representation, is described as one

  10. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 55, NO. 4, APRIL 2008 1813 Models for Bearing Damage Detection in Induction

    E-Print Network [OSTI]

    Boyer, Edmond

    be supervised by measur- ing quantities such as noise, vibration, and temperature. The implementation Damage Detection in Induction Motors Using Stator Current Monitoring Martin Blödt, Member, IEEE, Pierre analytical model for the influence of rolling-element bearing faults on induction motor stator current

  11. Appears in Abduction and Induction P. Flach and A. Kakas (Eds.), pp.181-191, Kluwer Academic Publishers, 2000

    E-Print Network [OSTI]

    Mooney, Raymond J.

    Appears in Abduction and Induction P. Flach and A. Kakas (Eds.), pp.181-191, Kluwer Academic: ...... Abstract. This article discusses the integration of traditional abductive and inductive rea- soning methods of traditional abductive methods to propose revisions during theory re nement, where an existing knowledge base

  12. Sensorless Control of Doubly-Fed Induction Generator-Based Wind urbines using a High-Order Sliding Mode Observer

    E-Print Network [OSTI]

    Brest, Université de

    ­ This paper deals with the sensorless control of a doubly-fed induction generator based wind turbine of the proposed sensorless control strategy. Keywords: Wind turbine, doubly-fed induction generator, sensorless scheme for a grid-connected wind turbine is given in Fig. 2. The wind turbine modeling is inspired from

  13. Superspace extrapolation reveals inductive biases in function learning Christopher G. Lucas

    E-Print Network [OSTI]

    Edinburgh, University of

    extrapolate to an n + 1- dimensional superspace of the training examples. Many exist- ing psychological models predict that superspace extrapolation should be fundamentally underdetermined, but we show that humansSuperspace extrapolation reveals inductive biases in function learning Christopher G. Lucas cglucas

  14. High density growth of T7 expression strains with auto-induction option

    DOE Patents [OSTI]

    Studier, F. William

    2013-03-19T23:59:59.000Z

    A method for promoting and suppressing auto-induction of transcription of a cloned gene 1 of bacteriophage T7 in cultures of bacterial cells grown batchwise is disclosed. The transcription is under the control of a promoter whose activity can be induced by an exogenous inducer whose ability to induce said promoter is dependent on the metabolic state of said bacterial cells.

  15. Symmetrical and Asymmetrical H-Bridge Multilevel Inverter for DTC Induction Motor Drive

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Symmetrical and Asymmetrical H-Bridge Multilevel Inverter for DTC Induction Motor Drive Automotive--Several works have been reported in the literature on multilevel inverters topologies, control techniques drives associated to three-phase multilevel inverter. This paper presents then a comparison study

  16. Self-excited induction generator for variable-speed wind turbine generation

    SciTech Connect (OSTI)

    Muljadi, E.; Gregory, B. [National Renewable Energy Lab., Golden, CO (United States)] [National Renewable Energy Lab., Golden, CO (United States); Broad, D. [Colorado State Univ., Fort Collins, CO (United States). Dept. of Electrical Engineering] [Colorado State Univ., Fort Collins, CO (United States). Dept. of Electrical Engineering

    1996-10-01T23:59:59.000Z

    When an induction generator is connected to a utility bus, the voltage and frequency at the terminal of the generator are the same as the voltage and frequency of the utility. The reactive power needed by the induction generator is supplied by the utility and the real power is returned to the utility. The rotor speed varies within a very limited range, and the reactive power requirement must be transported through a long line feeder, thus creating additional transmission losses. The energy captured by a wind turbine can be increased if the rotor speed can be adjusted to follow wind speed variations. For small applications such as battery charging or water pumping, a stand alone operation can be implemented without the need to maintain the output frequency output of the generator. A self- excited induction generator is a good candidate for a stand alone operation where the wind turbine is operated at variable speed. Thus the performance of the wind turbine can be unproved. In this paper, we examine a self-excited induction generator operated in a stand alone mode. A potential application for battery charging is given. The output power of the generator will be controlled to improve the performance of the wind turbine.

  17. A self-reconfigurable and fault-tolerant induction motor control architecture

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . Index Terms-- Fault tolerant, induction motor drive, hy- brid electric vehicule, observers. I the major requirements of automotive electric traction [1]. Several failures afflict electrical motor drives electric vehicles M. Hilairet, D. Diallo and M.E.H. Benbouzid Abstract-- This paper describes an adaptive

  18. Modeling and Control of a Marine Current Turbine Driven Doubly-Fed Induction Generator

    E-Print Network [OSTI]

    Boyer, Edmond

    --Marine current turbine, Doubly-Fed Induction Generator, modeling, control, Maximum Power Point Tracking current speed; = Tip speed ratio; s, (r) = Stator (rotor) index (superscripts); d, q = Synchronous leakage coefficient, = 1 ­ M2 /LsLr; r = Rotor position; (s) = Rotor electrical speed (electrical

  19. Performance Analysis and Comparison of Three IPMSM with High Homopolar Inductance for Electric Vehicle Applications

    E-Print Network [OSTI]

    Boyer, Edmond

    Synchronous Motor, Zero-Sequence Inductance, Electric Vehicle, Ripple Torque, Fast evaluation, Harmonics three topologies of PMSM according to the specifications of an electric vehicle (EV) with severe and especially for hybrid electric vehicle (HEV) and electric vehicle (EV). Moreover, interior permanent magnet

  20. Non-Stationary Spectral Estimation for Wind Turbine Induction Generator Faults Detection

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    - or indirect-drive, fixed- or variable-speed turbine generators, advanced signal processing tools are requiredNon-Stationary Spectral Estimation for Wind Turbine Induction Generator Faults Detection El Houssin- rine current turbine farms implies to minimize and predict maintenance operations. In direct

  1. Pipeline Muffling and A Priori Current Ramping: Architectural Techniques to Reduce High-Frequency Inductive Noise

    E-Print Network [OSTI]

    Vijaykumar, T. N.

    being utilized by controlling instruction issue, trading off some energy and performance to control di no per- formance loss, and ramp down immediately after usage, with little energy loss. Our techniques-Frequency Inductive Noise Michael D. Powell and T. N. Vijaykumar School of Electrical and Computer Engineering Purdue

  2. Occupational Health & Safety Directorate Queen Mary, University of London Fire Induction Form

    E-Print Network [OSTI]

    Chittka, Lars

    Occupational Health & Safety Directorate Queen Mary, University of London ­ Fire Induction Form June 2011 Note: In order to conform with Paragraph 21-(1) Regulatory Reform (F.S) Order 2005, the Head that the necessary information has been provided. This form must be retained by the department (copied to health

  3. Voltage control of emerging distribution systems with induction motor loads using robust LQG approach

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    , electricity is mainly produced by large generation plants, generally located near the primary energy sources has significant performance to improve the voltage profile of the distributed generation system & Sons, Ltd. key words: distributed generation; eigenvalue; H1 norm; induction motor; linear quadratic

  4. Increased induction in FeCo-based nanocomposite materials with reduced early transition metal growth inhibitors

    E-Print Network [OSTI]

    McHenry, Michael E.

    electrical power systems is motivated by a desire to replace transform- ers and other power electronic components with those that can operate at higher power densities, at higher frequencies and temperatures also exhibit power losses smaller than 10 W/kg at 0.2 T induction levels in 20 kHz fields. We discuss

  5. TECHNICAL ADVANCE The ethanol switch: a tool for tissue-specic gene induction

    E-Print Network [OSTI]

    Murray, J.A.H.

    TECHNICAL ADVANCE The ethanol switch: a tool for tissue-speci®c gene induction during plant is a powerful tool for the analysis of gene function during plant development. Here, we report ethanol inducible of an ethanol-regulated transcription factor, ALCR, is restricted to precise domains using speci®c promoters

  6. Determination of Mercury in Coal by Isotope Dilution Cold-Vapor Generation Inductively

    E-Print Network [OSTI]

    Articles Determination of Mercury in Coal by Isotope Dilution Cold-Vapor Generation Inductively. Approximately 93% of U.S. coal consumption is used to generate electricity, and the U.S. EPA has estimated2 developed for high-accuracy determinations of mer- cury in bituminous and sub-bituminous coals. A closed

  7. Optimisation de l'alimentation des machines rluctance variable polyphases avec inductances mutuelles

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , the electric connections, the excitation and the machine parameters on the size-power ratio and the torque dans les systèmes à vitesse variable. Pour améliorer les performances de la machine et diminuer le161 Optimisation de l'alimentation des machines à réluctance variable polyphasées avec inductances

  8. Current Frequency Spectral Subtraction and its Contribution to Induction Machines Bearings

    E-Print Network [OSTI]

    Boyer, Edmond

    , efficiency and performance are major concerns that direct the research activities in the field of electrical induction machine bearings by means of stator current spectral subtraction, which is performed using Short electric machines in industry mainly be- cause of their low price, ruggedness, efficiency and reliability

  9. Abstract--Cascaded nonlinear predictive controller for induction motor drive is presented. The load torque,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    types of electric machines, exhibits several advantages such as lower cost, reliability, simplicity of the machine. Both controllers are applied in a cascade structure to induction motor. The prediction model law minimizes a quadratic performance index of the predicted tracking error for multivariable system

  10. On ascertaining inductively the dimension of the joint kernel of certain commuting linear operators

    E-Print Network [OSTI]

    Shen, Zuowei

    On ascertaining inductively the dimension of the joint kernel of certain commuting linear operators), and a collection f`xgx2X of commuting linear maps on some linear space, the family of linear operators whose joint DMS-9000053, DMS-9102857. i #12;proposed running head: dimension of joint kernels Proofs should

  11. 3D MHD Free Surface Fluid Flow Simulation Based on Magnetic-Field Induction Equations

    E-Print Network [OSTI]

    California at Los Angeles, University of

    1 3D MHD Free Surface Fluid Flow Simulation Based on Magnetic-Field Induction Equations H.L. HUANG Huang@fusion.ucla.edu Abstract: The purpose of this paper is to present our recent efforts on 3D MHD-plane magnetic field configurations have shown that 3D MHD effects from a surface normal field gradient cause

  12. INDUCTION TIME EFFECTS IN PULSE COMBUSTORS \\Lambda Daniel L. Marcus y

    E-Print Network [OSTI]

    INDUCTION TIME EFFECTS IN PULSE COMBUSTORS \\Lambda Daniel L. Marcus y Richard B. Pember John B of pulse combustor is based on a Helmholtz resonator -- a burn­ ing cycle drives a resonant pressure wave a century ago, a full understanding of the operation of a pulse combustor still does not exist. The dominant

  13. Method of Evaluating the Zero-Sequence Inductance Ratio for Electrical Luis De Sousa, IEEE member

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    concerning the electrical machine design. Keywords Zero-sequence machine, mutual inductance, permanent magnet-phase machine with electrically independent phases. From a magnetic point of view, some couplings between phases shaft cannot move during the battery charge. In traction mode, the grid is not connected to the EM

  14. Lateen EM: Unsupervised Training with Multiple Objectives, Applied to Dependency Grammar Induction

    E-Print Network [OSTI]

    Tomkins, Andrew

    @cs.stanford.edu Hiyan Alshawi Google Inc. Mountain View, CA, 94043, USA hiyan@google.com Daniel Jurafsky DepartmentsLateen EM: Unsupervised Training with Multiple Objectives, Applied to Dependency Grammar Induction Valentin I. Spitkovsky Computer Science Department Stanford University and Google Inc. valentin

  15. Hybrid Control of a Three-Cell Converter Associated to an Inductive Load

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    3519 Hybrid Control of a Three-Cell Converter Associated to an Inductive Load M. Trabelsi, J of the proposed method. - Dynamic Hybrid Systems, Multi-cell converter, Hybrid control, Digital Signal Processing a class of Hybrid Dynamic Systems (HDS). In the field of power electronics, static converters associated

  16. How to achieve in-phase locking in small-inductance Josephson junction ladder arrays

    SciTech Connect (OSTI)

    Basler, M.; Krech, W.; Platov, K.Y. [Friedrich-Schiller-Universitaet Jena, Institut fuer Festkoerperphysik, Max-Wien-Platz 1, D-07743Jena (Germany)] [Friedrich-Schiller-Universitaet Jena, Institut fuer Festkoerperphysik, Max-Wien-Platz 1, D-07743Jena (Germany)

    1998-01-01T23:59:59.000Z

    We present the results of an analytical study of phase locking in externally loaded two-dimensional Josephson junction ladder arrays with small, but non-vanishing ring inductances. A Lyapunov stability based condition is found controlling realization of the radiating in-phase oscillation regime. {copyright} {ital 1998 American Institute of Physics.}

  17. Induction of a bystander mutagenic effect of alpha particles in mammalian cells

    E-Print Network [OSTI]

    biological effects of nuclear versus cytoplasmic irradiation has been of interest to biologistsInduction of a bystander mutagenic effect of alpha particles in mammalian cells Hongning Zhou for Radiological Research, College of Physicians and Surgeons, and Environmental Health Sciences, School of Public

  18. Predictive Power Control of Doubly-Fed Induction Generator for Wave Energy Converters

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    energy resource plan. An extremely abundant and promising source of energy exists in oceans of the following categories: wave energy, marine and tidal current energy, ocean thermal energy, energy fromPredictive Power Control of Doubly-Fed Induction Generator for Wave Energy Converters M.S. Lagoun1

  19. A Predictive power control of Doubly Fed Induction Generator for Wave Energy Converter

    E-Print Network [OSTI]

    Brest, Université de

    's excessive energy demand. An extremely abundant and promising source of energy exists in oceans. Currently be included in one of the following categories: wave energy, marine and tidal current energy, ocean thermalA Predictive power control of Doubly Fed Induction Generator for Wave Energy Converter in Irregular

  20. Site-Wide Wrapper Induction for Life Science Deep Web Databases

    E-Print Network [OSTI]

    Staab, Steffen

    Site-Wide Wrapper Induction for Life Science Deep Web Databases Saqib Mir1,2 , Steffen Staab2-world biochemical deep Web sources and report our preliminary results, which are very promising. Keywords: Deep Web-paste actions, create temporary text-files and manually link records. #12;"Deep Web" research aims to virtually

  1. 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

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. A longitudinal trend study of a university-based teacher induction program: observable behaviors of urban teachers and their perceptions of program components five years after participation

    E-Print Network [OSTI]

    Moon Merchant, Vickie V

    2006-10-30T23:59:59.000Z

    participants of a one-semester or a two-semester teacher induction program responding to the Teacher Induction Program Participant Survey (TIPPS) recognized formative observation as the most effective component. Peer support and professional development were...

  7. 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

  8. 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

  9. 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.

  10. 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...

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. Effect of capacitive coupling in a miniature inductively coupled plasma source

    SciTech Connect (OSTI)

    Takao, Yoshinori; Eriguchi, Koji; Ono, Kouichi [Department of Aeronautics and Astronautics, Graduate School of Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501 (Japan)

    2012-11-01T23:59:59.000Z

    Two-dimensional axisymmetric particle-in-cell simulations with a Monte Carlo collision algorithm (PIC-MCC) have been conducted to investigate the effect of capacitive coupling in a miniature inductively coupled plasma source (mICP) by using two models: an inductive model and a hybrid model. The mICP is 3 mm in radius and 6 mm in height with a three-turn planar coil, where argon plasma is sustained. In the inductive model, the coil is assumed to be electrostatically shielded, and thus the discharge is purely inductive coupling. In the hybrid model, we assume that the different turns of the coil act like electrodes in capacitive discharge to include the effect of capacitive coupling. The voltage applied to these electrodes decreases linearly from the powered end of the coil towards the grounded end. The numerical analysis has been performed for rf frequencies in the range of 100-1000 MHz, and the power absorbed by the plasma in the range of 5-50 mW at a fixed pressure of 500 mTorr. The PIC-MCC results show that potential oscillations at the plasma-dielectric interface are not negligible, and thus the major component of the absorbed power is caused by the axial motion of electrons in the hybrid model, although almost all of the power absorption is due to the azimuthal motion of electrons in the inductive model. The effect of capacitive coupling is more significant at lower rf frequencies and at higher absorbed powers under the calculation conditions examined. Moreover, much less coil currents are required in the hybrid model.

  20. Effect of trifluoperazine on toxicity, HIF-1? induction and hepatocyte regeneration in acetaminophen toxicity in mice

    SciTech Connect (OSTI)

    Chaudhuri, Shubhra, E-mail: SCHAUDHURI@uams.edu [Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas (United States) [Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas (United States); Arkansas Children's Hospital Research Institute, Little Rock, AR (United States); McCullough, Sandra S., E-mail: mcculloughsandras@uams.edu [Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas (United States); Arkansas Children's Hospital Research Institute, Little Rock, AR (United States); Hennings, Leah, E-mail: lhennings@uams.edu [Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, Arkansas (United States) [Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, Arkansas (United States); Arkansas Children's Hospital Research Institute, Little Rock, AR (United States); Brown, Aliza T., E-mail: brownalizat@uams.edu [Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas (United States); Arkansas Children's Hospital Research Institute, Little Rock, AR (United States); Li, Shun-Hwa [Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI (United States)] [Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI (United States); Simpson, Pippa M., E-mail: psimpson@mcw.edu [Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI (United States); Hinson, Jack A., E-mail: hinsonjacka@uams.edu [Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, Arkansas Children's Hospital Research Institute, Little Rock, AR (United States); James, Laura P., E-mail: jameslaurap@uams.edu [Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas (United States); Arkansas Children's Hospital Research Institute, Little Rock, AR (United States); Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, Arkansas Children's Hospital Research Institute, Little Rock, AR (United States)

    2012-10-15T23:59:59.000Z

    Oxidative stress and mitochondrial permeability transition (MPT) are important mechanisms in acetaminophen (APAP) toxicity. The MPT inhibitor trifluoperazine (TFP) reduced MPT, oxidative stress, and toxicity in freshly isolated hepatocytes treated with APAP. Since hypoxia inducible factor-one alpha (HIF-1?) is induced very early in APAP toxicity, a role for oxidative stress in the induction has been postulated. In the present study, the effect of TFP on toxicity and HIF-1? induction in B6C3F1 male mice treated with APAP was examined. Mice received TFP (10 mg/kg, oral gavage) prior to APAP (200 mg/kg IP) and at 7 and 36 h after APAP. Measures of metabolism (hepatic glutathione and APAP protein adducts) were comparable in the two groups of mice. Toxicity was decreased in the APAP/TFP mice at 2, 4, and 8 h, compared to the APAP mice. At 24 and 48 h, there were no significant differences in toxicity between the two groups. TFP lowered HIF-1? induction but also reduced the expression of proliferating cell nuclear antigen, a marker of hepatocyte regeneration. TFP can also inhibit phospholipase A{sub 2}, and cytosolic and secretory PLA{sub 2} activity levels were reduced in the APAP/TFP mice compared to the APAP mice. TFP also lowered prostaglandin E{sub 2} expression, a known mechanism of cytoprotection. In summary, the MPT inhibitor TFP delayed the onset of toxicity and lowered HIF-1? induction in APAP treated mice. TFP also reduced PGE{sub 2} expression and hepatocyte regeneration, likely through a mechanism involving PLA{sub 2}. -- Highlights: ? Trifluoperazine reduced acetaminophen toxicity and lowered HIF-1? induction. ? Trifluoperazine had no effect on the metabolism of acetaminophen. ? Trifluoperazine reduced hepatocyte regeneration. ? Trifluoperazine reduced phospholipase A{sub 2} activity and prostaglandin E{sub 2} levels.

  1. 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

  2. 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

  3. 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

  4. 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...

  5. 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.

  6. Appears in the Working Notes of the IJCAI-97 Workshop on Abduction and Induction in AI, pp.37-42, Nagoya, Japan, August 1997

    E-Print Network [OSTI]

    Mooney, Raymond J.

    Appears in the Working Notes of the IJCAI-97 Workshop on Abduction and Induction in AI, pp.37-42, Nagoya, Japan, August 1997 Integrating Abduction and Induction in Machine Learning Raymond J. Mooney This paper discusses the integration of tra- ditional abductive and inductive reasoning methods

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. Inhomogeneous soliton ratchets under two ac forces Luis Morales-Molina

    E-Print Network [OSTI]

    Sánchez, Angel "Anxo"

    Inhomogeneous soliton ratchets under two ac forces Luis Morales-Molina Max-Planck Institut für; 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  1. 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

  2. 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) ...............................................

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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...

  16. 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

  17. 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

  18. 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.

  19. 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°C 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

  20. 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

  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. Ac-conductivity and electromagnetic energy absorption for the Anderson model in linear response theory

    E-Print Network [OSTI]

    Abel Klein; Peter Müller

    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.

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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 ...