National Library of Energy BETA

Sample records for dave gates generating

  1. Digital gate pulse generator for cycloconverter control

    DOE Patents [OSTI]

    Klein, Frederick F. (Monroeville, PA); Mutone, Gioacchino A. (Pleasant Hills, PA)

    1989-01-01

    The present invention provides a digital gate pulse generator which controls the output of a cycloconverter used for electrical power conversion applications by determining the timing and delivery of the firing pulses to the switching devices in the cycloconverter. Previous gate pulse generators have been built with largely analog or discrete digital circuitry which require many precision components and periodic adjustment. The gate pulse generator of the present invention utilizes digital techniques and a predetermined series of values to develop the necessary timing signals for firing the switching device. Each timing signal is compared with a reference signal to determine the exact firing time. The present invention is significantly more compact than previous gate pulse generators, responds quickly to changes in the output demand and requires only one precision component and no adjustments.

  2. Compact floating-gate true random number generator

    E-Print Network [OSTI]

    Maryland at College Park, University of

    Compact floating-gate true random number generator P. Xu, Y.L. Wong, T.K. Horiuchi and P.A. Abshire A compact true random number generator (RNG) integrated circuit with adjustable probability is presented. Introduction: Random number generation is indispensable in crypto- graphy, scientific computing and stochastic

  3. Isolated-attosecond-pulse generation with infrared double optical gating

    SciTech Connect (OSTI)

    Lan Pengfei; Takahashi, Eiji J.; Midorikawa, Katsumi [Extreme Photonics Research Group, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)

    2011-06-15

    We propose and theoretically demonstrate an infrared two-color polarization gating scheme for generating an intense isolated attosecond pulse (IAP) in the multicycle regime. Our simulations show that an IAP can be produced using a multicycle two-color driving pulse with a duration up to 60 fs. Moreover, the carrier-envelope phase (CEP) of the driving laser is not required to be stabilized, although the IAP intensity changes with the CEP slip. Such a gating scheme significantly relaxes the requirements for driving lasers and opens the door to easily create intense IAPs with a high-power conventional multicycle laser pulse.

  4. Simulating Wax Crayons Dave Rudolf

    E-Print Network [OSTI]

    Mould, David

    Simulating Wax Crayons Dave Rudolf dave.rudolf@usask.ca David Mould mould@cs.usask.ca Eric Neufeld a physically-inspired model of wax crayons, which synthesizes drawings from collections of user- specified that evolves as it interacts with the paper. The amount of wax deposition is computed based on the crayon

  5. Employee Spotlight: Dave Keller

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

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  6. Employee Spotlight: Dave Keller

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

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  7. Attosecond x-ray source generation from two-color polarized gating plasmonic field enhancement

    SciTech Connect (OSTI)

    Feng, Liqiang [College of Science, Liaoning University of Technology, Jinzhou 121000 (China) [College of Science, Liaoning University of Technology, Jinzhou 121000 (China); State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Yuan, Minghu [State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China)] [State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Chu, Tianshu [State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China) [State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Institute for Computational Sciences and Engineering, Laboratory of New Fiber Materials and Modern Textile, The Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071 (China)

    2013-12-15

    The plasmonic field enhancement from the vicinity of metallic nanostructures as well as the polarization gating technique has been utilized to the generation of the high order harmonic and the single attosecond x-ray source. Through numerical solution of the time-dependent Schrödinger equation, for moderate the inhomogeneity and the polarized angle of the two fields, we find that not only the harmonic plateau has been extended and enhanced but also the single short quantum path has been selected to contribute to the harmonic. As a result, a series of 50 as pulses around the extreme ultraviolet and the x-ray regions have been obtained. Furthermore, by investigating the other parameters effects on the harmonic emission, we find that this two-color polarized gating plasmonic field enhancement scheme can also be achieved by the multi-cycle pulses, which is much better for experimental realization.

  8. Emerald Ash BY: DAVE CLOSE, ERIC WISEMAN AND SARAH GUGERCIN

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    Emerald Ash Borer BY: DAVE CLOSE, ERIC WISEMAN AND SARAH GUGERCIN VIRGINIA TECH PUBLICATION HORT-69NP #12;Emerald Ash Borer by Eric Wiseman, Sarah Gugercin, and Dave Close © 2013 Virginia Tech the Emerald Ash Borer Online Training Modules (2010), by Eric Wiseman, Sarah Gugercin, and Dave Close

  9. A Bidirectional Deposition Model of Wax Crayons Dave Rudolf

    E-Print Network [OSTI]

    Mould, David

    A Bidirectional Deposition Model of Wax Crayons Dave Rudolf dave.rudolf@usask.ca David Mould mould present a physically-inspired model of wax crayons, which synthesizes drawings from collections of user that evolves as it interacts with the paper. The amount of wax deposition is computed based on the crayon

  10. "Ask Argonne" - Dave Grabaskas, Nuclear Engineer, Part 2

    ScienceCinema (OSTI)

    Grabaskas, Dave

    2014-11-24

    Part 1 (http://www.youtube.com/watch?v=Vs_0wXoSL8M) of Dr. Dave Grabaskas' "Ask Argonne" video set drew many questions from the public. In Part 2, Grabaskas answers three of those questions.

  11. A STARMA MODEL FOR SOLAR RADIATION Chris Glasbey & Dave Allcroft

    E-Print Network [OSTI]

    Glasbey, Chris

    Scotland #12;QUESTION: If the Pentland Hills were covered with solar panels how would energy output varyA STARMA MODEL FOR SOLAR RADIATION Chris Glasbey & Dave Allcroft Biomathematics & Statistics? Solar radiation was measured at 10 sites every 10 minutes for a month 2 #12;3 #12;PLAN 1. Transformation

  12. Organic Electronics and Photovoltaics CopyrightDaveWhite2008

    E-Print Network [OSTI]

    ENERGY Organic Electronics and Photovoltaics Objective CopyrightDaveWhite2008 Organic electronics and photovoltaic technology are reaching critical mass with the establishment of a U.S. consortium and the recent an inte- grated suite of measurement methods to tie the electrical and photovoltaic performance of organic

  13. Optical XOR gate

    DOE Patents [OSTI]

    Vawter, G. Allen

    2013-11-12

    An optical XOR gate is formed as a photonic integrated circuit (PIC) from two sets of optical waveguide devices on a substrate, with each set of the optical waveguide devices including an electroabsorption modulator electrically connected in series with a waveguide photodetector. The optical XOR gate utilizes two digital optical inputs to generate an XOR function digital optical output. The optical XOR gate can be formed from III-V compound semiconductor layers which are epitaxially deposited on a III-V compound semiconductor substrate, and operates at a wavelength in the range of 0.8-2.0 .mu.m.

  14. Gate Access

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid you not find whatGasEnergyfeatureCleanperformanceCareersGate Access Gate

  15. Web Service Integration for Next Generation Localisation David Lewis, Stephen Curran,

    E-Print Network [OSTI]

    Way, Andy

    Web Service Integration for Next Generation Localisation David Lewis, Stephen Curran, Kevin Feeney, Ireland Dublin City Universit y, Ireland University of Limerick, Ireland {Dave.Lewis|Stephen.curran|K evin

  16. Billiards Digest February, 2010 David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES

    E-Print Network [OSTI]

    Alciatore, David G.

    Billiards Digest February, 2010 David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES "VEPS GEMS the 12-ball or 13-ball, or both, as demonstrated in NV B.68. #12;Billiards Digest February, 2010 8 11 Digest February, 2010 8 11 12 13 stun shot 90º tangent line "good-action" draw trisect direction medium

  17. Billiards Digest January, 2010 David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES

    E-Print Network [OSTI]

    Alciatore, David G.

    Billiards Digest January, 2010 David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES "VEPS GEMS" (i.e., "canned"). Now I feel like I have Billiards Digest "tenure." I can't believe it has been six and Position 1. cut shots 2. stun shots 3. follow shots #12;Billiards Digest January, 2010 4. draw shots 5. CB

  18. Billiards Digest April, 2011 David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES

    E-Print Network [OSTI]

    Alciatore, David G.

    Billiards Digest April, 2011 David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES "VEPS GEMS shots, Coriolis' system is a good place to start. #12;Billiards Digest April, 2011 a) side view b) top shot speed effects #12;Billiards Digest April, 2011 Diagram 3 (similar t

  19. "HAPS Part III: Gearing Outside English" ILLUSTRATED PRINCIPLES David Alciatore, PhD ("Dr. Dave")

    E-Print Network [OSTI]

    Alciatore, David G.

    "HAPS ­ Part III: Gearing Outside English" ILLUSTRATED PRINCIPLES David Alciatore, PhD ("Dr. Dave what is called "gearing" outside english (OE). The latter approach is the topic of this article between the balls. It turns out that there is an specific amount of spin, called gearing OE, that causes

  20. "VEPP Part XIV: Custom Drills" ILLUSTRATED PRINCIPLES David Alciatore, PhD ("Dr. Dave")

    E-Print Network [OSTI]

    Alciatore, David G.

    "VEPP ­ Part XIV: Custom Drills" ILLUSTRATED PRINCIPLES David Alciatore, PhD ("Dr. Dave DVD, where you create and work on customized drills based on you specific areas of weakness is with a "progressive practice" drill, where the difficulty level starts out easy and gradually increases. For example

  1. Measurement of Infrasound Emissions from Wind Turbines Dave Pepyne, Michael Zink and Jamyang Tenzin

    E-Print Network [OSTI]

    Mountziaris, T. J.

    Measurement of Infrasound Emissions from Wind Turbines Dave Pepyne, Michael Zink and Jamyang Tenzin energy has made wind turbine technology a suitable candidate for pollution-free energy. With its great that received many complaints from the residents living near the large wind turbine poles. Many scientists

  2. Program B.S. in Geology Assessment Coordinator for the program Dave Kreamer

    E-Print Network [OSTI]

    Hemmers, Oliver

    1 Program B.S. in Geology Assessment Coordinator for the program Dave Kreamer Department. Student Learning Outcomes for the program. By the end of the Geology program students will be able, and the environments in which they lived. 4. Recognize, in the field, various types of geologic structures, and be able

  3. ON THE SUSTAINABILITY AND ARREST OF WEAK LAYER FRACTURE IN WHUMPFS AND Dave Gauthier*1

    E-Print Network [OSTI]

    Jamieson, Bruce

    ON THE SUSTAINABILITY AND ARREST OF WEAK LAYER FRACTURE IN WHUMPFS AND AVALANCHES Dave Gauthier*1, Alberta, Canada ABSTRACT: Recent theoretical and practical descriptions of weak layer fracture have-sustaining. Arrest of weak layer fracture has been addressed for shear-based models, but has often been overlooked

  4. Cover photo credits: Clockwise from top left Dave Marci, file photo, file photo, Blair E. Witherington. Background file photo.

    E-Print Network [OSTI]

    #12;Cover photo credits: Clockwise from top left ­ Dave Marci, file photo, file photo, Blair E. Witherington. Background ­ file photo. #12;Deepwater Horizon Oil Spill Phase II Early Restoration Plan

  5. Cover photo credits: Clockwise from top left Dave Marci, file photo, file photo, Blair E. Witherington. Background file photo.

    E-Print Network [OSTI]

    #12;#12;Cover photo credits: Clockwise from top left ­ Dave Marci, file photo, file photo, Blair E. Witherington. Background ­ file photo. #12;Deepwater Horizon Oil Spill Phase II Early Restoration Plan

  6. Range gated imaging experiments using gated intensifiers

    SciTech Connect (OSTI)

    McDonald, T.E. Jr.; Yates, G.J.; Cverna, F.H.; Gallegos, R.A.; Jaramillo, S.A.; Numkena, D.M.; Payton, J.; Pena-Abeyta, C.R.

    1999-03-01

    A variety of range gated imaging experiments using high-speed gated/shuttered proximity focused microchannel plate image intensifiers (MCPII) are reported. Range gated imaging experiments were conducted in water for detection of submerged mines in controlled turbidity tank test and in sea water for the Naval Coastal Sea Command/US Marine Corps. Field experiments have been conducted consisting of kilometer range imaging of resolution targets and military vehicles in atmosphere at Eglin Air Force Base for the US Air Force, and similar imaging experiments, but in smoke environment, at Redstone Arsenal for the US Army Aviation and Missile Command (AMCOM). Wavelength of the illuminating laser was 532 nm with pulse width ranging from 6 to 12 ns and comparable gate widths. These tests have shown depth resolution in the tens of centimeters range from time phasing reflected LADAR images with MCPII shutter opening.

  7. Analog Noise Reduction in Enzymatic Logic Gates

    E-Print Network [OSTI]

    Dmitriy Melnikov; Guinevere Strack; Marcos Pita; Vladimir Privman; Evgeny Katz

    2009-05-17

    In this work we demonstrate both experimentally and theoretically that the analog noise generation by a single enzymatic logic gate can be dramatically reduced to yield gate operation with virtually no input noise amplification. This is achieved by exploiting the enzyme's specificity when using a co-substrate that has a much lower affinity than the primary substrate. Under these conditions, we obtain a negligible increase in the noise output from the logic gate as compared to the input noise level. Experimental realizations of the AND logic gate with the enzyme horseradish peroxidase using hydrogen peroxide and two different co-substrates, 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) and ferrocyanide, with vastly different rate constants confirmed our general theoretical conclusions.

  8. From: Dave Ulery To: Congestion Study Comments Subject: 2014 Congestion Study Comment...

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

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  9. Learning Methods for Lung Tumor Markerless Gating in Image-Guided Radiotherapy

    E-Print Network [OSTI]

    Dy, Jennifer G.

    Learning Methods for Lung Tumor Markerless Gating in Image-Guided Radiotherapy Ying Cui Dept. For gated lung cancer radiotherapy, it is difficult to generate ac- curate gating signals due to the large techniques, we apply them on five sequences of fluoroscopic images from five lung cancer patients against

  10. Representative Control Gates

    E-Print Network [OSTI]

    Rhoads, James

    Representative Staffing & Management Reviews & Control Gates The NASA Program/Project Life Cycle Concept C Concept/Design Evaluation Criteria ° Feasibility Assessment ° Life Cycle Cost Estimates ° Trade Requirements Establish Optimum System Design Analyze Mission Requirements Establish Optimum Architecture

  11. Advanced insulated gate bipolar transistor gate drive

    DOE Patents [OSTI]

    Short, James Evans (Monongahela, PA); West, Shawn Michael (West Mifflin, PA); Fabean, Robert J. (Donora, PA)

    2009-08-04

    A gate drive for an insulated gate bipolar transistor (IGBT) includes a control and protection module coupled to a collector terminal of the IGBT, an optical communications module coupled to the control and protection module, a power supply module coupled to the control and protection module and an output power stage module with inputs coupled to the power supply module and the control and protection module, and outputs coupled to a gate terminal and an emitter terminal of the IGBT. The optical communications module is configured to send control signals to the control and protection module. The power supply module is configured to distribute inputted power to the control and protection module. The control and protection module outputs on/off, soft turn-off and/or soft turn-on signals to the output power stage module, which, in turn, supplies a current based on the signal(s) from the control and protection module for charging or discharging an input capacitance of the IGBT.

  12. Use of high-level design information for enabling automation of fine-grained power gating

    E-Print Network [OSTI]

    Agarwal, Abhinav

    2014-01-01

    Leakage power reduction through power gating requires considerable design and verification effort. Conventionally, extensive analysis is required for dividing a heterogeneous design into power domains and generating control ...

  13. David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES "End-of-game frozen-rail shots"

    E-Print Network [OSTI]

    Alciatore, David G.

    : Supporting narrated video (NV) demonstrations, high-speed video (HSV) clips, and technical proofs (TP (especially if the 8-ball were closer to the pocket). My new high-speed video DVD has a feature on thisDavid Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES "End-of-game frozen-rail shots" Note

  14. David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES "End-of-game frozen-rail shots part II"

    E-Print Network [OSTI]

    Alciatore, David G.

    " Note: Supporting narrated video (NV) demonstrations, high-speed video (HSV) clips, and technical proofs the example in the video). Faster speed helps the 8-ball compress into the rail cushion more, allowing the CBDavid Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES "End-of-game frozen-rail shots ­ part II

  15. Parallel transport quantum logic gates with trapped ions

    E-Print Network [OSTI]

    de Clercq, Ludwig; Marinelli, Matteo; Nadlinger, David; Oswald, Robin; Negnevitsky, Vlad; Kienzler, Daniel; Keitch, Ben; Home, Jonathan P

    2015-01-01

    Quantum information processing will require combinations of gate operations and communication, with each applied in parallel to large numbers of quantum systems. These tasks are often performed sequentially, with gates implemented by pulsed fields and information transported either by moving the physical qubits or using photonic links. For trapped ions, an alternative approach is to implement quantum logic gates by transporting the ions through static laser beams, combining qubit operations with transport. This has significant advantages for scalability since the voltage waveforms required for transport can potentially be generated using micro-electronics integrated into the trap structure itself, while both optical and microwave control elements are significantly more bulky. Using a multi-zone ion trap, we demonstrate transport gates on a qubit encoded in the hyperfine structure of a beryllium ion. We show the ability to perform sequences of operations, and to perform parallel gates on two ions transported t...

  16. Compact modeling of Double-Gate MOSFETs

    E-Print Network [OSTI]

    Lu, Huaxin

    2006-01-01

    Architecture with High-k Gate Dielectrics, Metal Gates and Strain Engineering," in Symposium on VLSI Technology

  17. Trapped-ion quantum logic gates based on oscillating magnetic fields

    E-Print Network [OSTI]

    C. Ospelkaus; C. E. Langer; J. M. Amini; K. R. Brown; D. Leibfried; D. J. Wineland

    2008-05-14

    Oscillating magnetic fields and field gradients can be used to implement single-qubit rotations and entangling multi-qubit quantum gates for trapped-ion quantum information processing (QIP). With fields generated by currents in microfabricated surface-electrode traps, it should be possible to achieve gate speeds that are comparable to those of optically induced gates for realistic distances between the ion crystal and the electrode surface. Magnetic-field-mediated gates have the potential to significantly reduce the overhead in laser beam control and motional state initialization compared to current QIP experiments with trapped ions and will eliminate spontaneous scattering, a fundamental source of decoherence in laser-mediated gates.

  18. Quantum optical interface for gate-controlled spintronic devices

    E-Print Network [OSTI]

    Hans-Andreas Engel; Jacob M. Taylor; Mikhail D. Lukin; Atac Imamoglu

    2006-12-29

    We describe an opto-electronic structure in which charge and spin degrees of freedom in electrical gate-defined quantum dots can be coherently coupled to light. This is achieved via electron-electron interaction or via electron tunneling into a proximal self-assembled quantum dot. We illustrate potential applications of this approach by considering several quantum control techniques, including optical read-out of gate-controlled semiconductor quantum bits and controlled generation of entangled photon-spin pairs.

  19. Gate complexity using Dynamic Programming

    E-Print Network [OSTI]

    Srinivas Sridharan; Mile Gu; Matthew R. James

    2008-07-03

    The relationship between efficient quantum gate synthesis and control theory has been a topic of interest in the quantum control literature. Motivated by this work, we describe in the present article how the dynamic programming technique from optimal control may be used for the optimal synthesis of quantum circuits. We demonstrate simulation results on an example system on SU(2), to obtain plots related to the gate complexity and sample paths for different logic gates.

  20. Universal Gates via Fusion and Measurement Operations on SU$(2)_4$ Anyons

    E-Print Network [OSTI]

    Claire Levaillant; Bela Bauer; Michael Freedman; Zhenghan Wang; Parsa Bonderson

    2015-07-01

    We examine a class of operations for topological quantum computation based on fusing and measuring topological charges for systems with SU$(2)_4$ or $k=4$ Jones-Kauffman anyons. We show that such operations augment the braiding operations, which, by themselves, are not computationally universal. This augmentation results in a computationally universal gate set through the generation of an exact, topologically protected irrational phase gate and an approximate, topologically protected controlled-$Z$ gate.

  1. David Gates home page

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalent Bonding Low-Cost2 DOE HQSiteoC. DoranDatabaseDepartment ofGates

  2. Penn State DOE GATE Program

    SciTech Connect (OSTI)

    Anstrom, Joel

    2012-08-31

    The Graduate Automotive Technology Education (GATE) Program at The Pennsylvania State University (Penn State) was established in October 1998 pursuant to an award from the U.S. Department of Energy (U.S. DOE). The focus area of the Penn State GATE Program is advanced energy storage systems for electric and hybrid vehicles.

  3. Range gated strip proximity sensor

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1996-01-01

    A range gated strip proximity sensor uses one set of sensor electronics and a distributed antenna or strip which extends along the perimeter to be sensed. A micro-power RF transmitter is coupled to the first end of the strip and transmits a sequence of RF pulses on the strip to produce a sensor field along the strip. A receiver is coupled to the second end of the strip, and generates a field reference signal in response to the sequence of pulse on the line combined with received electromagnetic energy from reflections in the field. The sensor signals comprise pulses of radio frequency signals having a duration of less than 10 nanoseconds, and a pulse repetition rate on the order of 1 to 10 MegaHertz or less. The duration of the radio frequency pulses is adjusted to control the range of the sensor. An RF detector feeds a filter capacitor in response to received pulses on the strip line to produce a field reference signal representing the average amplitude of the received pulses. When a received pulse is mixed with a received echo, the mixing causes a fluctuation in the amplitude of the field reference signal, providing a range-limited Doppler type signature of a field disturbance.

  4. Range gated strip proximity sensor

    DOE Patents [OSTI]

    McEwan, T.E.

    1996-12-03

    A range gated strip proximity sensor uses one set of sensor electronics and a distributed antenna or strip which extends along the perimeter to be sensed. A micro-power RF transmitter is coupled to the first end of the strip and transmits a sequence of RF pulses on the strip to produce a sensor field along the strip. A receiver is coupled to the second end of the strip, and generates a field reference signal in response to the sequence of pulse on the line combined with received electromagnetic energy from reflections in the field. The sensor signals comprise pulses of radio frequency signals having a duration of less than 10 nanoseconds, and a pulse repetition rate on the order of 1 to 10 MegaHertz or less. The duration of the radio frequency pulses is adjusted to control the range of the sensor. An RF detector feeds a filter capacitor in response to received pulses on the strip line to produce a field reference signal representing the average amplitude of the received pulses. When a received pulse is mixed with a received echo, the mixing causes a fluctuation in the amplitude of the field reference signal, providing a range-limited Doppler type signature of a field disturbance. 6 figs.

  5. Cluster computing software for GATE simulations

    SciTech Connect (OSTI)

    Beenhouwer, Jan de; Staelens, Steven; Kruecker, Dirk; Ferrer, Ludovic; D'Asseler, Yves; Lemahieu, Ignace; Rannou, Fernando R.

    2007-06-15

    Geometry and tracking (GEANT4) is a Monte Carlo package designed for high energy physics experiments. It is used as the basis layer for Monte Carlo simulations of nuclear medicine acquisition systems in GEANT4 Application for Tomographic Emission (GATE). GATE allows the user to realistically model experiments using accurate physics models and time synchronization for detector movement through a script language contained in a macro file. The downside of this high accuracy is long computation time. This paper describes a platform independent computing approach for running GATE simulations on a cluster of computers in order to reduce the overall simulation time. Our software automatically creates fully resolved, nonparametrized macros accompanied with an on-the-fly generated cluster specific submit file used to launch the simulations. The scalability of GATE simulations on a cluster is investigated for two imaging modalities, positron emission tomography (PET) and single photon emission computed tomography (SPECT). Due to a higher sensitivity, PET simulations are characterized by relatively high data output rates that create rather large output files. SPECT simulations, on the other hand, have lower data output rates but require a long collimator setup time. Both of these characteristics hamper scalability as a function of the number of CPUs. The scalability of PET simulations is improved here by the development of a fast output merger. The scalability of SPECT simulations is improved by greatly reducing the collimator setup time. Accordingly, these two new developments result in higher scalability for both PET and SPECT simulations and reduce the computation time to more practical values.

  6. SF Gate Home Today's News

    E-Print Network [OSTI]

    Savrasov, Sergej Y.

    SF Gate Home Today's News Sports Entertainment Technology Live Views Traffic Weather Health Clues to Behavior of Plutonium / Research may help safety of storing ... 9/5/2003file://E:\\Homepages\\SavrasovHome

  7. Retrofit of Tehran City Gate Station C.G.S. No. 2 by Using Turboexpander 

    E-Print Network [OSTI]

    Seresht, R. T.; Ja, H. K.

    2010-01-01

    air components. 6. Liquefaction gases (like Helium). 7. Separating condensable components of natural gas. 8. Power generation from geothermal energy. Retrofit of Tehran City Gate Station C.G.S. No.2 by Using Turboexpander Yasun Farayand Company...

  8. Trapped ion scaling with pulsed fast gates

    E-Print Network [OSTI]

    C. D. B. Bentley; A. R. R. Carvalho; J. J. Hope

    2015-07-10

    Fast entangling gates for trapped ions offer vastly improved gate operation times relative to implemented gates, as well as approaches to trap scaling. Gates on neighbouring ions only involve local ions when performed sufficiently fast, and we find that even a fast gate between distant ions with few degrees of freedom restores all the motional modes given more stringent gate speed conditions. We compare pulsed fast gate schemes, defined by a timescale faster than the trap period, and find that our proposed scheme has less stringent requirements on laser repetition rate for achieving arbitrary gate time targets and infidelities well below $10^{-4}$. By extending gate schemes to ion crystals, we explore the effect of ion number on gate fidelity for coupling neighbouring pairs of ions in large crystals. Inter-ion distance determines the gate time, and a factor of five increase in repetition rate, or correspondingly the laser power, reduces the infidelity by almost two orders of magnitude. We also apply our fast gate scheme to entangle the first and last ions in a crystal. As the number of ions in the crystal increases, significant increases in the laser power are required to provide the short gate times corresponding to fidelity above 0.99.

  9. Planning a cost-effective gate rehab

    SciTech Connect (OSTI)

    Rudolph, R.M.; Gundry, J.A. [American Society of Civil Engineers, Nashville, TN (United States)

    1996-04-01

    Hydropower project owners are devoting increasing attention to the condition and safety of spillway gates and related equipment. With careful inspection and planning, owners can develop a rehabilitation program that improves gate performance and minimizes cost. The July 1995 failure of a spillway gate at Folsom Dam has spurred increased attention on inspection and rehabilitation of gates. This article explains an approach taken by Northern States Power Company in rehabilitating aged gates at its Wisota Dam project. An update on measures being taken in response to the Folsom Dam incident is also included.

  10. Synthesis of Reversible Functions Beyond Gate Count and Quantum Cost

    E-Print Network [OSTI]

    Robert Wille; Mehdi Saeedi; Rolf Drechsler

    2010-04-26

    Many synthesis approaches for reversible and quantum logic have been proposed so far. However, most of them generate circuits with respect to simple metrics, i.e. gate count or quantum cost. On the other hand, to physically realize reversible and quantum hardware, additional constraints exist. In this paper, we describe cost metrics beyond gate count and quantum cost that should be considered while synthesizing reversible and quantum logic for the respective target technologies. We show that the evaluation of a synthesis approach may differ if additional costs are applied. In addition, a new cost metric, namely Nearest Neighbor Cost (NNC) which is imposed by realistic physical quantum architectures, is considered in detail. We discuss how existing synthesis flows can be extended to generate optimal circuits with respect to NNC while still keeping the quantum cost small.

  11. APPLIED PHYSICS REVIEWS Ultrathin ,,4 nm... SiO2 and SiON gate dielectric layers for silicon

    E-Print Network [OSTI]

    Garfunkel, Eric

    . . . . . . . . . . . . . . . . . . . . . . . . . . 2078 4. Neutral electron trap generation. . . . . . . . . . 2079 5. Stress-induced leakage current. . . . . . . . . . . . . . . . . . . . . . 2065 C. Ion beam analysis. . . . . . . . . . . . . . . . . . . . . . . . . 2067 D. Electron microscopy. . . . . . . . . . . . . . . . . . . 2075 1. C­V measurements. . . . . . . . . . . . . . . . . . . . 2075 2. Gate tunnel current

  12. Stage-Gate Innovation Management Guidelines

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

    It is critical, therefore, that there is an effective pathway for innovative technology and new technical information to reach the end-user. The Stage-Gate Innovation...

  13. Towards Magneto-Logic Gates in Graphene

    E-Print Network [OSTI]

    Wen, Hua

    2014-01-01

    using graphene based spintronic logic gates. Proc. SPIE,applications using spintronic devices for logic operationa leading candidate for spintronic applications due to its

  14. Bielectron vortices in gated graphene

    E-Print Network [OSTI]

    C. A. Downing; M. E. Portnoi

    2015-06-14

    We study the formation of bound two-particle states in gapless monolayer graphene in gated structures. We find that, even in the regime of massless Dirac fermions, coupling can occur at zero-energy for different or same charge quasiparticles. These bipartite states must have a non-zero internal angular momentum, meaning that they only exist as stationary vortices. We propose a new picture of the experimentally seen Fermi velocity renormalization as a manifestation of these pairs, suggest the possibility of a condensate of these novel quasiparticles.

  15. Gate Solar | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavy ElectricalsFTL SolarGate Solar Jump to: navigation, search Name:

  16. Transparently wrap-gated semiconductor nanowire arrays for studies of gate-controlled photoluminescence

    SciTech Connect (OSTI)

    Nylund, Gustav; Storm, Kristian; Torstensson, Henrik; Wallentin, Jesper; Borgström, Magnus T.; Hessman, Dan; Samuelson, Lars

    2013-12-04

    We present a technique to measure gate-controlled photoluminescence (PL) on arrays of semiconductor nanowire (NW) capacitors using a transparent film of Indium-Tin-Oxide (ITO) wrapping around the nanowires as the gate electrode. By tuning the wrap-gate voltage, it is possible to increase the PL peak intensity of an array of undoped InP NWs by more than an order of magnitude. The fine structure of the PL spectrum reveals three subpeaks whose relative peak intensities change with gate voltage. We interpret this as gate-controlled state-filling of luminescing quantum dot segments formed by zincblende stacking faults in the mainly wurtzite NW crystal structure.

  17. Asynchronous Balanced Gates Tolerant to Interconnect Variability

    E-Print Network [OSTI]

    Karpovsky, Mark

    values and transitions to ensure that it does not produce a data-dependent power signature which can switching at the output of the gate. However, in the existing designs the data-independent power consumption and the unavoidable variation due to manufacture. We present gate designs which have data-independent power

  18. High Performance Electrolyte Gated Carbon Nanotube Transistors

    E-Print Network [OSTI]

    Gore, Jeff

    High Performance Electrolyte Gated Carbon Nanotube Transistors Sami Rosenblatt, Yuval Yaish, Jiwoong Park,, Jeff Gore, Vera Sazonova, and Paul L. McEuen*, Laboratory of Atomic and Solid State Physics to grow the tubes, annealing to improve the contacts, and an electrolyte as a gate, we obtain very high

  19. Retaining latch for a water pit gate

    DOE Patents [OSTI]

    Beale, A.R.

    1997-11-18

    A retaining latch is described for use in a hazardous materials storage or handling facility to adjustably retain a water pit gate in a gate frame. A retaining latch is provided comprising a latch plate which is rotatably mounted to each end of the top of the gate and a recessed opening, formed in the gate frame, for engaging an edge of the latch plate. The latch plate is circular in profile with one side cut away or flat, such that the latch plate is D-shaped. The remaining circular edge of the latch plate comprises steps of successively reduced thickness. The stepped edge of the latch plate fits inside a recessed opening formed in the gate frame. As the latch plate is rotated, alternate steps of the latch plate are engaged by the recessed opening. When the latch plate is rotated such that the flat portion of the latch plate faces the recessed opening in the gate frame, there is no connection between the opening and the latch plate and the gate is unlatched from the gate frame. 4 figs.

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

    Office of Scientific and Technical Information (OSTI)

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

  1. Vehicle Technologies Office Merit Review 2015: Gate Driver Optimizatio...

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

    Gate Driver Optimization for WBG Applications Vehicle Technologies Office Merit Review 2015: Gate Driver Optimization for WBG Applications Presentation given by Oak Ridge National...

  2. PENN STATE DOE GRADUATE AUTOMOTIVE TECHNOLOGY EDUCATION (GATE...

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

    PENN STATE DOE GRADUATE AUTOMOTIVE TECHNOLOGY EDUCATION (GATE) PROGRAM FOR PENN STATE DOE GRADUATE AUTOMOTIVE TECHNOLOGY EDUCATION (GATE) PROGRAM FOR 2009 DOE Hydrogen Program and...

  3. University of Illinois at Urbana-Champaign's GATE Center for...

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

    Champaign's GATE Center for Advanced Automotive Bio-Fuel Combustion Engines University of Illinois at Urbana-Champaign's GATE Center for Advanced Automotive Bio-Fuel Combustion...

  4. Gate-tunable exchange coupling between cobalt clusters on graphene...

    Office of Scientific and Technical Information (OSTI)

    Accepted Manuscript: Gate-tunable exchange coupling between cobalt clusters on graphene Title: Gate-tunable exchange coupling between cobalt clusters on graphene Authors:...

  5. PIA - Savannah River Nuclear Solution (SRNS) MedGate Occupational...

    Energy Savers [EERE]

    MedGate Occupational Health and Safety Medical System (OHS) (Includes the Drug and Alcohol Testing System (Assistant)) PIA - Savannah River Nuclear Solution (SRNS) MedGate...

  6. Gating of Permanent Molds for ALuminum Casting

    SciTech Connect (OSTI)

    David Schwam; John F. Wallace; Tom Engle; Qingming Chang

    2004-03-30

    This report summarizes a two-year project, DE-FC07-01ID13983 that concerns the gating of aluminum castings in permanent molds. The main goal of the project is to improve the quality of aluminum castings produced in permanent molds. The approach taken was determine how the vertical type gating systems used for permanent mold castings can be designed to fill the mold cavity with a minimum of damage to the quality of the resulting casting. It is evident that somewhat different systems are preferred for different shapes and sizes of aluminum castings. The main problems caused by improper gating are entrained aluminum oxide films and entrapped gas. The project highlights the characteristic features of gating systems used in permanent mold aluminum foundries and recommends gating procedures designed to avoid common defects. The study also provides direct evidence on the filling pattern and heat flow behavior in permanent mold castings.

  7. Ancilla-Assisted Discrimination of Quantum Gates

    E-Print Network [OSTI]

    Jianxin Chen; Mingsheng Ying

    2008-09-02

    The intrinsic idea of superdense coding is to find as many gates as possible such that they can be perfectly discriminated. In this paper, we consider a new scheme of discrimination of quantum gates, called ancilla-assisted discrimination, in which a set of quantum gates on a $d-$dimensional system are perfectly discriminated with assistance from an $r-$dimensional ancilla system. The main contribution of the present paper is two-fold: (1) The number of quantum gates that can be discriminated in this scheme is evaluated. We prove that any $rd+1$ quantum gates cannot be perfectly discriminated with assistance from the ancilla, and there exist $rd$ quantum gates which can be perfectly discriminated with assistance from the ancilla. (2) The dimensionality of the minimal ancilla system is estimated. We prove that there exists a constant positive number $c$ such that for any $k\\leq cr$ quantum gates, if they are $d$-assisted discriminable, then they are also $r$-assisted discriminable, and there are $c^{\\prime}r\\textrm{}(c^{\\prime}>c)$ different quantum gates which can be discriminated with a $d-$dimensional ancilla, but they cannot be discriminated if the ancilla is reduced to an $r-$dimensional system. Thus, the order $O(r)$ of the number of quantum gates that can be discriminated with assistance from an $r-$dimensional ancilla is optimal. The results reported in this paper represent a preliminary step toward understanding the role ancilla system plays in discrimination of quantum gates as well as the power and limit of superdense coding.

  8. GATE Center of Excellence at UAB in Lightweight Materials for Automotive Applications

    SciTech Connect (OSTI)

    2011-07-31

    This report summarizes the accomplishments of the UAB GATE Center of Excellence in Lightweight Materials for Automotive Applications. The first Phase of the UAB DOE GATE center spanned the period 2005-2011. The UAB GATE goals coordinated with the overall goals of DOE's FreedomCAR and Vehicles Technologies initiative and DOE GATE program. The FCVT goals are: (1) Development and validation of advanced materials and manufacturing technologies to significantly reduce automotive vehicle body and chassis weight without compromising other attributes such as safety, performance, recyclability, and cost; (2) To provide a new generation of engineers and scientists with knowledge and skills in advanced automotive technologies. The UAB GATE focused on both the FCVT and GATE goals in the following manner: (1) Train and produce graduates in lightweight automotive materials technologies; (2) Structure the engineering curricula to produce specialists in the automotive area; (3) Leverage automotive related industry in the State of Alabama; (4) Expose minority students to advanced technologies early in their career; (5) Develop innovative virtual classroom capabilities tied to real manufacturing operations; and (6) Integrate synergistic, multi-departmental activities to produce new product and manufacturing technologies for more damage tolerant, cost-effective, and lighter automotive structures.

  9. Impulse radar with swept range gate

    DOE Patents [OSTI]

    McEwan, T.E.

    1998-09-08

    A radar range finder and hidden object locator is based on ultra-wide band radar with a high resolution swept range gate. The device generates an equivalent time amplitude scan with a typical range of 4 inches to 20 feet, and an analog range resolution as limited by a jitter of on the order of 0.01 inches. A differential sampling receiver is employed to effectively eliminate ringing and other aberrations induced in the receiver by the near proximity of the transmit antenna, so a background subtraction is not needed, simplifying the circuitry while improving performance. Techniques are used to reduce clutter in the receive signal, such as decoupling the receive and transmit cavities by placing a space between them, using conductive or radiative damping elements on the cavities, and using terminating plates on the sides of the openings. The antennas can be arranged in a side-by-side parallel spaced apart configuration or in a coplanar opposed configuration which significantly reduces main bang coupling. 25 figs.

  10. Range gating experiments through a scattering media

    SciTech Connect (OSTI)

    Payton, J.; Cverna, F.; Gallegos, R.; McDonald, T.; Numkena, D.; Obst, A.; Pena-Abeyta, C.; Yates, G.

    1998-12-31

    This paper discusses range-gated imaging experiments performed recently at Redstone Arsenal in Huntsville, Alabama. Range gating is an imaging technique that uses a pulsed laser and gated camera to image objects at specific ranges. The technique can be used for imaging through scattering media such as dense smoke or fog. Range gating uses the fact that light travels at 3 x 10{sup 8} m/s. Knowing the speed of light the authors can calculate the time it will take the laser light to travel a known distance, then gate open a Micro Channel Plate Image Intensifier (MCPII) at the time the reflected light returns from the target. In the Redstone experiment the gate width on the MCPII was set to equal the laser pulse width ({approximately} 8 ns) for the highest signal to noise ratio. The gate allows the light reflected form the target and a small portion of the light reflected from the smoke in the vicinity of the target to be imaged. They obtained good results in light and medium smoke but the laser they were used did not have sufficient intensity to penetrate the thickest smoke. They did not diverge the laser beam to cover the entire target in order to maintain a high flux that would achieve better penetration through the smoke. They were able to image an Armored Personnel Carrier (APC) through light and medium smoke but they were not able to image the APC through heavy smoke. The experiment and results are presented.

  11. Gate Sizing and Vth Assignment for Asynchronous Circuits Using Lagrangian Relaxation

    E-Print Network [OSTI]

    Chu, Chris C.-N.

    constraints are beyond the ability of synchronous EDA tools to handle thus inferior results are generated performance. Recent asynchronous design flows try to directly leverage synchronous EDA tools to select gates, which have a lot of limitations due to the intrinsic difference between asynchronous and synchronous

  12. Hafnium-doped tantalum oxide high-k gate dielectric films for future CMOS technology 

    E-Print Network [OSTI]

    Lu, Jiang

    2007-04-25

    A novel high-k gate dielectric material, i.e., hafnium-doped tantalum oxide (Hf-doped TaOx), has been studied for the application of the future generation metal-oxidesemiconductor field effect transistor (MOSFET). The film's electrical, chemical...

  13. Time-resolved imaging with OKE-based time-gate: enhancement in spatial resolution using low-coherence ultra-short illumination

    E-Print Network [OSTI]

    Purwar, Harsh; Rozé, Claude; Blaisot, Jean-Bernard

    2015-01-01

    We propose a collinear optical Kerr effect (OKE) based time-gate configuration with low coherence illumination source, derived from the supercontinuum (SC) generated by focusing the femtosecond laser pulses inside water. At first the spectral broadening in SC generation and corresponding changes in its coherence properties are studied and then a narrow band of wavelengths is extracted to use as the probe beam in the OKE-based time-gate configuration. The gate timings and spatial resolution of the time-gated images are also investigated. The low coherence of the probe ensures that the artifacts due to speckles from the laser are reduced to a minimum. To illustrate this a comparison of the time-resolved images of the fuel sprays obtained with this configuration has been made with the images obtained with the collinear, dual color configuration of the optical gate with coherent illumination.

  14. High level compilation for gate reconfigurable architectures

    E-Print Network [OSTI]

    Babb, Jonathan William

    2001-01-01

    A continuing exponential increase in the number of programmable elements is turning management of gate-reconfigurable architectures as "glue logic" into an intractable problem; it is past time to raise this abstraction ...

  15. Gate fidelity fluctuations and quantum process invariants

    SciTech Connect (OSTI)

    Magesan, Easwar; Emerson, Joseph [Institute for Quantum Computing and Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario N2L 3G1 (Canada); Blume-Kohout, Robin [Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

    2011-07-15

    We characterize the quantum gate fidelity in a state-independent manner by giving an explicit expression for its variance. The method we provide can be extended to calculate all higher order moments of the gate fidelity. Using these results, we obtain a simple expression for the variance of a single-qubit system and deduce the asymptotic behavior for large-dimensional quantum systems. Applications of these results to quantum chaos and randomized benchmarking are discussed.

  16. GaTe semiconductor for radiation detection

    DOE Patents [OSTI]

    Payne, Stephen A. (Castro Valley, CA); Burger, Arnold (Nashville, TN); Mandal, Krishna C. (Ashland, MA)

    2009-06-23

    GaTe semiconductor is used as a room-temperature radiation detector. GaTe has useful properties for radiation detectors: ideal bandgap, favorable mobilities, low melting point (no evaporation), non-hygroscopic nature, and availability of high-purity starting materials. The detector can be used, e.g., for detection of illicit nuclear weapons and radiological dispersed devices at ports of entry, in cities, and off shore and for determination of medical isotopes present in a patient.

  17. Engineering a C-Phase quantum gate: optical design and experimental realization

    E-Print Network [OSTI]

    Andrea Chiuri; Chiara Greganti; Paolo Mataloni

    2012-04-12

    A two qubit quantum gate, namely the C-Phase, has been realized by exploiting the longitudinal momentum (i.e. the optical path) degree of freedom of a single photon. The experimental setup used to engineer this quantum gate represents an advanced version of the high stability closed-loop interferometric setup adopted to generate and characterize 2-photon 4-qubit Phased Dicke states. Some experimental results, dealing with the characterization of multipartite entanglement of the Phased Dicke states are also discussed in detail.

  18. UC Davis Fuel Cell, Hydrogen, and Hybrid Vehicle (FCH2V) GATE Center of Excellence

    SciTech Connect (OSTI)

    Erickson, Paul

    2012-05-31

    This is the final report of the UC Davis Fuel Cell, Hydrogen, and Hybrid Vehicle (FCH2V) GATE Center of Excellence which spanned from 2005-2012. The U.S. Department of Energy (DOE) established the Graduate Automotive Technology Education (GATE) Program, to provide a new generation of engineers and scientists with knowledge and skills to create advanced automotive technologies. The UC Davis Fuel Cell, Hydrogen, and Hybrid Vehicle (FCH2V) GATE Center of Excellence established in 2005 is focused on research, education, industrial collaboration and outreach within automotive technology. UC Davis has had two independent GATE centers with separate well-defined objectives and research programs from 1998. The Fuel Cell Center, administered by ITS-Davis, has focused on fuel cell technology. The Hybrid-Electric Vehicle Design Center (HEV Center), administered by the Department of Mechanical and Aeronautical Engineering, has focused on the development of plug-in hybrid technology using internal combustion engines. The merger of these two centers in 2005 has broadened the scope of research and lead to higher visibility of the activity. UC Davisâ??s existing GATE centers have become the campusâ??s research focal points on fuel cells and hybrid-electric vehicles, and the home for graduate students who are studying advanced automotive technologies. The centers have been highly successful in attracting, training, and placing top-notch students into fuel cell and hybrid programs in both industry and government.

  19. Mechanically induced two-qubit gates and maximally entangled states for single electron spins in a carbon nanotube

    E-Print Network [OSTI]

    Heng Wang; Guido Burkard

    2015-08-10

    We theoretically analyze a system where two electrons are trapped separately in two quantum dots on a suspended carbon nanotube (CNT), subject to external ac electric driving. An indirect mechanically-induced coupling of two distant single electron spins is induced by the interaction between the spins and the mechanical motion of the CNT. We show that a two-qubit iSWAP gate and arbitrary single-qubit gates can be obtained from the intrinsic spin-orbit coupling. Combining the iSWAP gate and single-qubit gates, maximally entangled states of two spins can be generated in a single step by varying the frequency and the strength of the external electric driving field. The spin-phonon coupling can be turned off by electrostatically shifting the electron wave function on the nanotube.

  20. Gate dielectric development for flexible electronics

    SciTech Connect (OSTI)

    Joshi, P. C.; Voutsas, A. T.; Hartzell, J. W. [LCD Process Technology Laboratories, SHARP Laboratories of America, Inc., 5700 NW Pacific Rim Blvd., Camas, Washington 98607 (United States)

    2007-07-15

    Thin film transistors integrated on flexible substrates are becoming increasingly attractive for low cost displays, sensors, and rf communication applications. The successful development of the flexible devices will be dictated by the enhancement in the thermal stability of the substrates and the low temperature (<300 deg. C) processing of the gate dielectric. The plasma-enhanced chemical-vapor deposition (PECVD) technique has successfully met the demands of the gate dielectric for display devices at processing temperatures lower than 600 deg. C. However, a further reduction in the processing temperatures below 300 deg. C is essential to realize low cost, highly functional devices on flexible substrates. The low temperature processing of gate dielectric films necessitates the development of processes and techniques with plasma controlled reaction kinetics dominating the thin film growth rather than the thermal state of the substrate. In the present work, the authors report on the processing of high quality gate dielectric films by high density PECVD technique at process temperatures lower than 300 deg. C. The bulk and interfacial electrical quality and reliability of the metal-oxide-semiconductor capacitors as a function of process temperature are discussed in this article. A comparison with the high temperature gate oxide films deposited by PECVD technique employing capacitively coupled plasma source has been made to establish the film quality and reliability. The films processed at low temperatures have shown good electrical performance and reliability as evaluated in terms of the leakage current, flatband voltage, midgap interface trap concentration, and bias temperature stress reliability characteristics.

  1. Dave Roberts POBox

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalent Bonding Low-Cost2 DOE HQSiteoC. DoranDatabase Help March.*..* -_.

  2. A Message from Dave............................................

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematics And StatisticsProgram Manager DirectoryofDOE CONNECTED LIGHTINGEnergyReporting |A Look

  3. A Message from Dave............................................

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12 Beta-3 Racetracks25 AMO PeerServices6ProgramA Little Shade

  4. Gates, Oregon: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainable UrbanKentucky: Energy ResourcesMaui Area (DOEMaui AreaGastonGatesGates,

  5. Characterization and production metrology of thin transistor gate oxide lms

    E-Print Network [OSTI]

    Garfunkel, Eric

    Review Characterization and production metrology of thin transistor gate oxide ®lms Alain C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 4. XRR and NR characterization of thin oxide ®lms . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 5.2. Optical models of thin gate ®lms

  6. Looking at Transistor Gate Oxide Formation in Real Time

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

    Looking at Transistor Gate Oxide Formation in Real Time Print The oxide gate layer is critical to every transistor, and present-day layer thicknesses are in the 10-20 range (1-2...

  7. Compact modeling of quantum effects in double gate MOSFETs

    E-Print Network [OSTI]

    Wang, Wei

    2007-01-01

    However, ultrathin gate oxide will lead to high gate leakagethe high enough oxide barrier confinement leads to zero waveoxide becomes significant. The random dopant fluctuation effects increase with shrinking device size and leads

  8. Electroluminescence in ion gel gated organic polymer semiconductor transistors

    E-Print Network [OSTI]

    Bhat, Shrivalli

    2011-07-12

    This thesis reports the light emission in ion gel gated, thin film organic semiconductor transistors and investigates the light emission mechanism behind these devices. We report that ion gel gated organic polymer semiconductor transistors emit...

  9. On the Query Complexity of Perfect Gate Discrimination

    E-Print Network [OSTI]

    D'Ariano, Giacomo Mauro

    On the Query Complexity of Perfect Gate Discrimination Giulio Chiribella1 , Giacomo Mauro D'Ariano2 both deterministic strategies. For unambiguous gate discrimination, where errors are not tolerated that there is no difference between perfect probabilistic and perfect determin- istic gate discrimination. Hence, evaluating

  10. Tamper Resilient Circuits: The Adversary at the Gates Aggelos Kiayias

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Tamper Resilient Circuits: The Adversary at the Gates Aggelos Kiayias Yiannis Tselekounis Abstract We initiate the investigation of gate-tampering attacks against cryptographic circuits. Our model is motivated by the plausibility of tampering directly with circuit gates and by the increasing use of tamper

  11. Cavity-QED-based quantum phase gate 

    E-Print Network [OSTI]

    Zubairy, M. Suhail; Kim, M.; Scully, Marlan O.

    2003-01-01

    appropriately detuned from the other mode of the cavit photon each in the two modes and the atom is initially gate in such a system and discuss potential applications DOI: 10.1103/PhysRevA.68.033820 PAC I. INTRODUCTION Quantum computing @1# employs...

  12. Yuanmingyuan East Gate of Peking University

    E-Print Network [OSTI]

    Gu, Jin

    and New Energy Technology 32 Institute of Education Schools & Departments A Foreign Student AffairsRoad) MingdeRoad (XinminRoad) (XuetangRoad) (Zhishan Road) (Tsinghua Road) (XichunRoad) Car Zhaolanyuan Shopping Area West Gate New Qinghuaxuetang #12;

  13. Efficient Generation of Generic Entanglement

    E-Print Network [OSTI]

    R. Oliveira; O. C. O. Dahlsten; M. B. Plenio

    2007-04-03

    We find that generic entanglement is physical, in the sense that it can be generated in polynomial time from two-qubit gates picked at random. We prove as the main result that such a process generates the average entanglement of the uniform (Haar) measure in at most $O(N^3)$ steps for $N$ qubits. This is despite an exponentially growing number of such gates being necessary for generating that measure fully on the state space. Numerics furthermore show a variation cut-off allowing one to associate a specific time with the achievement of the uniform measure entanglement distribution. Various extensions of this work are discussed. The results are relevant to entanglement theory and to protocols that assume generic entanglement can be achieved efficiently.

  14. Method for voltage-gated protein fractionation

    DOE Patents [OSTI]

    Hatch, Anson (Tracy, CA); Singh, Anup K. (Danville, CA)

    2012-04-24

    We report unique findings on the voltage dependence of protein exclusion from the pores of nanoporous polymer exclusion membranes. The pores are small enough that proteins are excluded from passage with low applied electric fields, but increasing the field enables proteins to pass through. The requisite field necessary for a change in exclusion is protein-specific with a correlation to protein size. The field-dependence of exclusion is important to consider for preconcentration applications. The ability to selectively gate proteins at exclusion membranes is also a promising means for manipulating and characterizing proteins. We show that field-gated exclusion can be used to selectively remove proteins from a mixture, or to selectively trap protein at one exclusion membrane in a series.

  15. Generating coherent broadband continuum soft-x-ray radiation by

    E-Print Network [OSTI]

    Neumark, Daniel M.

    Generating coherent broadband continuum soft-x-ray radiation by attosecond ionization gating Thomas as the driver for high-harmonic generation that has a cosine-like electric field stabilized with respect the generation of broadband and tunable attosecond pulses. Instead of fixing the carrier-envelope phase

  16. Transport quantum logic gates for trapped ions

    E-Print Network [OSTI]

    D. Leibfried; E. Knill; C. Ospelkaus; D. J. Wineland

    2007-08-28

    Many efforts are currently underway to build a device capable of large scale quantum information processing (QIP). Whereas QIP has been demonstrated for a few qubits in several systems, many technical difficulties must be overcome in order to construct a large-scale device. In one proposal for large-scale QIP, trapped ions are manipulated by precisely controlled light pulses and moved through and stored in multizone trap arrays. The technical overhead necessary to precisely control both the ion geometrical configurations and the laser interactions is demanding. Here we propose methods that significantly reduce the overhead on laser beam control for performing single and multiple qubit operations on trapped ions. We show how a universal set of operations can be implemented by controlled transport of ions through stationary laser beams. At the same time, each laser beam can be used to perform many operations in parallel, potentially reducing the total laser power necessary to carry out QIP tasks. The overall setup necessary for implementing transport gates is simpler than for gates executed on stationary ions. We also suggest a transport-based two-qubit gate scheme utilizing microfabricated permanent magnets that can be executed without laser light.

  17. Towards Legged Amphibious Mobile Robotics Chris Prahacs*, Aaron Saunders**, Matthew K. Smith*, Dave McMordie***, Martin Buehler**

    E-Print Network [OSTI]

    Dudek, Gregory

    configuration is common to all versions of RHex. Each actuator consists of one Maxon rare-earth permanent magnet industrial computer format (PC/104) computer stack running Proportional-Derivative servo and gait- generation

  18. PENN STATE DOE GRADUATE AUTOMOTIVE TECHNOLOGY EDUCATION (GATE...

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

    of GATE fellows * Partners - none Milestones Goals and Objectives * Provide graduate curriculum focused on high-power in- vehicle energy storage for hybrid electric and fuel cell...

  19. Optical Determination of Gate--Tunable Bandgap in Bilayer Graphene

    E-Print Network [OSTI]

    Zhang, Yuanbo

    2010-01-01

    Tunable Bandgap in Bilayer Graphene Yuanbo Zhang* 1 , Tsung-gate-tunable bandgap in graphene bilayers with magnitude asbands. In two- dimensional graphene bilayers this bandgap

  20. Fast gates for ion traps by splitting laser pulses

    E-Print Network [OSTI]

    C. D. B. Bentley; A. R. R. Carvalho; D. Kielpinski; J. J. Hope

    2013-04-09

    We present a fast phase gate scheme that is experimentally achievable and has an operation time more than two orders of magnitude faster than current experimental schemes for low numbers of pulses. The gate time improves with the number of pulses following an inverse power law. Unlike implemented schemes which excite precise motional sidebands, thus limiting the gate timescale, our scheme excites multiple motional states using discrete ultra-fast pulses. We use beam-splitters to divide pulses into smaller components to overcome limitations due to the finite laser pulse repetition rate. This provides gate times faster than proposed theoretical schemes when we optimise a practical setup.

  1. Gating-by-tilt of mechanosensitive membrane channels

    E-Print Network [OSTI]

    Matthew S. Turner; Pierre Sens

    2003-11-25

    We propose an alternative mechanism for the gating of biological membrane channels in response to membrane tension that involves a change in the slope of the membrane near the channel. Under biological membrane tensions we show that the energy difference between the closed (tilted) and open (untilted) states can far exceed kBT and is comparable to what is available under simple ilational gating. Recent experiments demonstrate that membrane leaflet asymmetries (spontaneous curvature) can strong effect the gating of some channels. Such a phenomenon would be more easy to explain under gating-by-tilt, given its novel intrinsic sensitivity to such asymmetry.

  2. The Difficulty of Gate Control in Molecular Transistors

    E-Print Network [OSTI]

    D. Hou; J. H. Wei

    2011-09-27

    The electrostatic gating effects on molecular transistors are investigated using the density functional theory (DFT) combined with the nonequilibrium Green's function (NEGF) method. When molecular energy levels are away from the Fermi energy they can be linearly shifted by the gate voltage, which is consistent with recent experimental observations [Nature 462, 1039 (2009)]. However, when they move near to the Fermi energy (turn-on process), the shifts become extremely small and almost independent of the gate voltage. The fact that the conductance may be beyond the gate control in the "ON" state will challenge the implementation of molecular transistors.

  3. Penn State DOE Graduate Automotive Technology Education (Gate...

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

    Penn State DOE Graduate Automotive Technology Education (Gate) Program for In-Vehicle, High-Power Energy Storage Systems Penn State DOE Graduate Automotive Technology Education...

  4. PIA - Savannah River Nuclear Solution (SRNS) MedGate Occupational...

    Energy Savers [EERE]

    PIA - Savannah River Nuclear Solution (SRNS) MedGate Occupational Health and Safety Medical System (OHS) (Includes the Drug and Alcohol Testing System (Assistant)) PIA - Savannah...

  5. 2012 ARPA-E Energy Innovation Summit: Fireside Chat with Steven Chu and Bill Gates

    ScienceCinema (OSTI)

    Chu, Steven (U.S. Department of Energy Secretary); Gates, Bill (Microsoft, Chairman); Podesta, John (Center for American Progress, Chair and Counselor)

    2012-03-21

    The third annual ARPA-E Energy Innovation Summit was held in Washington D.C. in February, 2012. The event brought together key players from across the energy ecosystem - researchers, entrepreneurs, investors, corporate executives, and government officials - to share ideas for developing and deploying the next generation of energy technologies. This video captures a session called 'Fireside Chat' that featured Steven Chu, the Secretary of Energy, and Bill Gates, Chairman of Microsoft Corporation. The session is moderated by John Podesta, Chair of the Center for American Progress. Energy Secretary Steven Chu and Microsoft Founder and Chairman Bill Gates exchanged ideas about how small businesses and innovators can overcome the challenges that face many startups.

  6. Interactive Simulation of Complex Audio-Visual Scenes Kees van den Doel, Dave Knott, Dinesh K. Pai

    E-Print Network [OSTI]

    van den Doel, Kees

    plates. (b) House with metal roof. (c) Gazebo. (d) Garbage can. Figure 1: Several small scenes We demonstrate a method for efficiently rendering the audio generated by graphical scenes- thesis is linear in the total number active "modes" (or sound sources). However, while this is efficient

  7. Speed control system for an access gate

    DOE Patents [OSTI]

    Bzorgi, Fariborz M. (Knoxville, TN)

    2012-03-20

    An access control apparatus for an access gate. The access gate typically has a rotator that is configured to rotate around a rotator axis at a first variable speed in a forward direction. The access control apparatus may include a transmission that typically has an input element that is operatively connected to the rotator. The input element is generally configured to rotate at an input speed that is proportional to the first variable speed. The transmission typically also has an output element that has an output speed that is higher than the input speed. The input element and the output element may rotate around a common transmission axis. A retardation mechanism may be employed. The retardation mechanism is typically configured to rotate around a retardation mechanism axis. Generally the retardation mechanism is operatively connected to the output element of the transmission and is configured to retard motion of the access gate in the forward direction when the first variable speed is above a control-limit speed. In many embodiments the transmission axis and the retardation mechanism axis are substantially co-axial. Some embodiments include a freewheel/catch mechanism that has an input connection that is operatively connected to the rotator. The input connection may be configured to engage an output connection when the rotator is rotated at the first variable speed in a forward direction and configured for substantially unrestricted rotation when the rotator is rotated in a reverse direction opposite the forward direction. The input element of the transmission is typically operatively connected to the output connection of the freewheel/catch mechanism.

  8. Optimizing local protocols implementing nonlocal quantum gates

    E-Print Network [OSTI]

    Scott M. Cohen

    2010-02-02

    We present a method of optimizing recently designed protocols for implementing an arbitrary nonlocal unitary gate acting on a bipartite system. These protocols use only local operations and classical communication with the assistance of entanglement, and are deterministic while also being "one-shot", in that they use only one copy of an entangled resource state. The optimization is in the sense of minimizing the amount of entanglement used, and it is often the case that less entanglement is needed than with an alternative protocol using two-way teleportation.

  9. Poly-Si?â??xGex Film Growth for Ni Germanosilicided Metal Gate

    E-Print Network [OSTI]

    Yu, Hongpeng

    Scaling down of the CMOS technology requires thinner gate dielectric to maintain high performance. However, due to the depletion of poly-Si gate, it is difficult to reduce the gate thickness further especially for sub-65 ...

  10. Modeling gated neutron images of THD capsules

    SciTech Connect (OSTI)

    Wilson, Douglas Carl; Grim, Gary P; Tregillis, Ian L; Wilke, Mark D; Morgan, George L; Loomis, Eric N; Wilde, Carl H; Oertel, John A; Fatherley, Valerie E; Clark, David D; Schmitt, Mark J; Merrill, Frank E; Wang, Tai - Sen F; Danly, Christopher R; Batha, Steven H; Patel, M; Sepke, S; Hatarik, R; Fittinghoff, D; Bower, D; Marinak, M; Munro, D; Moran, M; Hilko, R; Frank, M; Buckles, R

    2010-01-01

    Time gating a neutron detector 28m from a NIF implosion can produce images at different energies. The brighter image near 14 MeV reflects the size and symmetry of the capsule 'hot spot'. Scattered neutrons, {approx}9.5-13 MeV, reflect the size and symmetry of colder, denser fuel, but with only {approx}1-7% of the neutrons. The gated detector records both the scattered neutron image, and, to a good approximation, an attenuated copy of the primary image left by scintillator decay. By modeling the imaging system the energy band for the scattered neutron image (10-12 MeV) can be chosen, trading off the decayed primary image and the decrease of scattered image brightness with energy. Modeling light decay from EJ399, BC422, BCF99-55, Xylene, DPAC-30, and Liquid A leads to a preference from BCF99-55 for the first NIF detector, but DPAC 30 and Liquid A would be preferred if incorporated into a system. Measurement of the delayed light from the NIF scintillator using implosions at the Omega laser shows BCF99-55 to be a good choice for down-scattered imaging at 28m.

  11. Nonvolatile memory disturbs due to gate and junction leakage currents

    E-Print Network [OSTI]

    Schroder, Dieter K.

    leakage currents induced by stress due to LOCOS and trap- assisted tunneling (TAT). * Corresponding author Department of Electrical Engineering and Center for Solid State Electronics Research, Arizona State) from traps within the gate oxides. Such low gate leakage currents can lead to sufficient charge

  12. University of Illinois at Urbana-Champaigns GATE Center for...

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

    Champaigns GATE Center for Advanced Automotive Bio-Fuel Combustion Engines University of Illinois at Urbana-Champaigns GATE Center for Advanced Automotive Bio-Fuel Combustion...

  13. US DOE Sponsored Graduate Automotive Technology Education (GATE) Program at Penn State Emphasizing

    E-Print Network [OSTI]

    Lee, Dongwon

    US DOE Sponsored Graduate Automotive Technology Education (GATE) Program at Penn State Emphasizing in the automotive industry and academia. Develop relationships between GATE students, faculty, employers

  14. New SRAM Cell Design for Low Power and High Reliability using 32nm Independent Gate FinFET Technology

    E-Print Network [OSTI]

    Ayers, Joseph

    gate voltage (VGb). This is similar to the body effect in a bulk transistor. An independent-gate Fin

  15. Demonstration of Robust Quantum Gate Tomography via Randomized Benchmarking

    E-Print Network [OSTI]

    Blake R. Johnson; Marcus P. da Silva; Colm A. Ryan; Shelby Kimmel; Jerry M. Chow; Thomas A. Ohki

    2015-05-25

    Typical quantum gate tomography protocols struggle with a self-consistency problem: the gate operation cannot be reconstructed without knowledge of the initial state and final measurement, but such knowledge cannot be obtained without well-characterized gates. A recently proposed technique, known as randomized benchmarking tomography (RBT), sidesteps this self-consistency problem by designing experiments to be insensitive to preparation and measurement imperfections. We implement this proposal in a superconducting qubit system, using a number of experimental improvements including implementing each of the elements of the Clifford group in single `atomic' pulses and custom control hardware to enable large overhead protocols. We show a robust reconstruction of several single-qubit quantum gates, including a unitary outside the Clifford group. We demonstrate that RBT yields physical gate reconstructions that are consistent with fidelities obtained by randomized benchmarking.

  16. Ballistic Imaging of High-Pressure Fuel Sprays using Incoherent, Ultra- short Pulsed Illumination with an Ultrafast OKE-based Time Gating

    E-Print Network [OSTI]

    Purwar, Harsh; Rozé, Claude; Blaisot, Jean-Bernard

    2015-01-01

    We present an optical Kerr effect based time-gate with the collinear incidence of the pump and probe beams at the Kerr medium, liquid carbon disulfide, for ballistic imaging of the high-pressure fuel sprays. The probe pulse used to illuminate the object under study is extracted from the supercontinuum generated by tightly focusing intense femtosecond laser pulses inside water, thereby destroying their coherence. The optical imaging spatial resolution and gate timings are investigated and compared with a similar setup without supercontinuum generation, where the probe is still coherent. And finally, a few ballistic images of the fuel sprays using coherent and incoherent illumination with the proposed time-gate are presented and compared qualitatively.

  17. Graphene terahertz modulators by ionic liquid gating

    E-Print Network [OSTI]

    Wu, Yang; Qiu, Xuepeng; Liu, Jingbo; Deorani, Praveen; Banerjee, Karan; Son, Jaesung; Chen, Yuanfu; Chia, Elbert E M; Yang, Hyunsoo

    2015-01-01

    Graphene based THz modulators are promising due to the conical band structure and high carrier mobility of graphene. Here, we tune the Fermi level of graphene via electrical gating with the help of ionic liquid to control the THz transmittance. It is found that, in the THz range, both the absorbance and reflectance of the device increase proportionately to the available density of states due to intraband transitions. Compact, stable, and repeatable THz transmittance modulation up to 93% (or 99%) for a single (or stacked) device has been demonstrated in a broad frequency range from 0.1 to 2.5 THz, with an applied voltage of only 3 V at room temperature.

  18. Gated Si nanowires for large thermoelectric power factors

    SciTech Connect (OSTI)

    Neophytou, Neophytos, E-mail: N.Neophytou@warwick.ac.uk [School of Engineering, University of Warwick, Coventry CV4 7AL (United Kingdom); Kosina, Hans [Institute for Microelectronics, Vienna University of Technology, Gusshausstrasse 27-29/E360, Vienna A-1040 (Austria)

    2014-08-18

    We investigate the effect of electrostatic gating on the thermoelectric power factor of p-type Si nanowires (NWs) of up to 20?nm in diameter in the [100], [110], and [111] crystallographic transport orientations. We use atomistic tight-binding simulations for the calculation of the NW electronic structure, coupled to linearized Boltzmann transport equation for the calculation of the thermoelectric coefficients. We show that gated NW structures can provide ?5× larger thermoelectric power factor compared to doped channels, attributed to their high hole phonon-limited mobility, as well as gating induced bandstructure modifications which further improve mobility. Despite the fact that gating shifts the charge carriers near the NW surface, surface roughness scattering is not strong enough to degrade the transport properties of the accumulated hole layer. The highest power factor is achieved for the [111] NW, followed by the [110], and finally by the [100] NW. As the NW diameter increases, the advantage of the gated channel is reduced. We show, however, that even at 20?nm diameters (the largest ones that we were able to simulate), a ?3× higher power factor for gated channels is observed. Our simulations suggest that the advantage of gating could still be present in NWs with diameters of up to ?40?nm.

  19. Variability-Aware Design of Double Gate FinFET-based Current Mirrors

    E-Print Network [OSTI]

    Mohanty, Saraju P.

    = front gate voltage, Vgb= back gate voltage. In the SG mode, the front and back gates are tied together and the back-gate voltage (Vgb) is set to 0 V. The low-power (LP)-mode applies a reverse-bias voltage of -0.2V

  20. Implementations of quantum and classical gates with linear optical devices and photon number quantum non-demolition measurement for polarization encoded qubits

    E-Print Network [OSTI]

    Joao Batista Rosa Silva; Rubens Viana Ramos

    2006-07-26

    Aiming the construction of quantum computers and quantum communication systems based on optical devices, in this work we present possible implementations of quantum and classical CNOTs gates, as well an optical setup for generation and distribution of bipartite entangled states, using linear optical devices and photon number quantum non-demolition measurement.

  1. Micro-mechanical logic for field produceable gate arrays

    E-Print Network [OSTI]

    Prakash, Manu

    2005-01-01

    A paradigm of micro-mechanical gates for field produceable logic is explored. A desktop manufacturing system is sought after which is capable of printing functional logic devices in the field. A logic scheme which induces ...

  2. Constructing two-qubit gates with minimal couplings

    E-Print Network [OSTI]

    Yuan, Haidong

    Couplings between quantum systems are frequently less robust and harder to implement than controls on individual systems; thus, constructing quantum gates with minimal interactions is an important problem in quantum ...

  3. Looking at Transistor Gate Oxide Formation in Real Time

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

    using this beamline were able to chart the rate of oxidation of silicon in the gate oxide layer for the first time. Understanding the rate of oxidation in this crucial layer...

  4. Gate-Level Characterization: Foundations and Hardware Security Applications

    E-Print Network [OSTI]

    Potkonjak, Miodrag

    Security Keywords Gate-level characterization, thermal conditioning, hardware Trojan horse, manufacturing leakage energy, ever increasing sub- strate noise, profound and intrinsic manufacturing variabil- ity (MV rights management. However, GLC is challenging due to the existence of manufacturing variability (MV

  5. Optimal Control Theory for Continuous Variable Quantum Gates

    E-Print Network [OSTI]

    Rebing Wu; Raj Chakrabarti; Herschel Rabitz

    2007-08-16

    We apply the methodology of optimal control theory to the problem of implementing quantum gates in continuous variable systems with quadratic Hamiltonians. We demonstrate that it is possible to define a fidelity measure for continuous variable (CV) gate optimization that is devoid of traps, such that the search for optimal control fields using local algorithms will not be hindered. The optimal control of several quantum computing gates, as well as that of algorithms composed of these primitives, is investigated using several typical physical models and compared for discrete and continuous quantum systems. Numerical simulations indicate that the optimization of generic CV quantum gates is inherently more expensive than that of generic discrete variable quantum gates, and that the exact-time controllability of CV systems plays an important role in determining the maximum achievable gate fidelity. The resulting optimal control fields typically display more complicated Fourier spectra that suggest a richer variety of possible control mechanisms. Moreover, the ability to control interactions between qunits is important for delimiting the total control fluence. The comparative ability of current experimental protocols to implement such time-dependent controls may help determine which physical incarnations of CV quantum information processing will be the easiest to implement with optimal fidelity.

  6. Diophantine Generation,

    E-Print Network [OSTI]

    Shlapentokh, Alexandra

    Diophantine Generation, Horizontal and Vertical Problems, and the Weak Vertical Method Alexandra Shlapentokh Diophantine Sets, Definitions and Generation Diophantine Sets Diophantine Generation Properties of Diophantine Generation Diophantine Family of Z Diophantine Family of a Polynomial Ring Going Down Horizontal

  7. Filter design for hybrid spin gates

    E-Print Network [OSTI]

    Andreas Albrecht; Martin B. Plenio

    2015-04-14

    The impact of control sequences on the environmental coupling of a quantum system can be described in terms of a filter. Here we analyze how the coherent evolution of two interacting spins subject to periodic control pulses, at the example of a nitrogen vacancy center coupled to a nuclear spin, can be described in the filter framework in both the weak and the strong coupling limit. A universal functional dependence around the filter resonances then allows for tuning the coupling type and strength. Originally limited to small rotation angles, we show how the validity range of the filter description can be extended to the long time limit by time-sliced evolution sequences. Based on that insight, the construction of tunable, noise decoupled, conditional gates composed of alternating pulse sequences is proposed. In particular such an approach can lead to a significant improvement in fidelity as compared to a strictly periodic control sequence. Moreover we analyze the decoherence impact, the relation to the filter for classical noise known from dynamical decoupling sequences, and we outline how an alternating sequence can improve spin sensing protocols.

  8. Gated integrator with signal baseline subtraction

    DOE Patents [OSTI]

    Wang, X.

    1996-12-17

    An ultrafast, high precision gated integrator includes an opamp having differential inputs. A signal to be integrated is applied to one of the differential inputs through a first input network, and a signal indicative of the DC offset component of the signal to be integrated is applied to the other of the differential inputs through a second input network. A pair of electronic switches in the first and second input networks define an integrating period when they are closed. The first and second input networks are substantially symmetrically constructed of matched components so that error components introduced by the electronic switches appear symmetrically in both input circuits and, hence, are nullified by the common mode rejection of the integrating opamp. The signal indicative of the DC offset component is provided by a sample and hold circuit actuated as the integrating period begins. The symmetrical configuration of the integrating circuit improves accuracy and speed by balancing out common mode errors, by permitting the use of high speed switching elements and high speed opamps and by permitting the use of a small integrating time constant. The sample and hold circuit substantially eliminates the error caused by the input signal baseline offset during a single integrating window. 5 figs.

  9. Gated integrator with signal baseline subtraction

    DOE Patents [OSTI]

    Wang, Xucheng (Lisle, IL)

    1996-01-01

    An ultrafast, high precision gated integrator includes an opamp having differential inputs. A signal to be integrated is applied to one of the differential inputs through a first input network, and a signal indicative of the DC offset component of the signal to be integrated is applied to the other of the differential inputs through a second input network. A pair of electronic switches in the first and second input networks define an integrating period when they are closed. The first and second input networks are substantially symmetrically constructed of matched components so that error components introduced by the electronic switches appear symmetrically in both input circuits and, hence, are nullified by the common mode rejection of the integrating opamp. The signal indicative of the DC offset component is provided by a sample and hold circuit actuated as the integrating period begins. The symmetrical configuration of the integrating circuit improves accuracy and speed by balancing out common mode errors, by permitting the use of high speed switching elements and high speed opamps and by permitting the use of a small integrating time constant. The sample and hold circuit substantially eliminates the error caused by the input signal baseline offset during a single integrating window.

  10. The gated community: residents' crime experience and perception of safety behind gates and fences in the urban area 

    E-Print Network [OSTI]

    Kim, Suk Kyung

    2006-10-30

    The primary purpose of the study is to explore the connections between residents' perception of safety and their crime experience, and the existence of gates and fences in multi-family housing communities in urban areas. ...

  11. Ge MOS Characteristics with CVD HfO2 Gate Dielectrics and TaN Gate Electrode W. P. Bai*, N. Lu*, J. Liu*, A. Ramirez**, D. L. Kwong*, D. Wristers**, A. Ritenour#

    E-Print Network [OSTI]

    Ge MOS Characteristics with CVD HfO2 Gate Dielectrics and TaN Gate Electrode W. P. Bai*, N. Lu*, J, we report for the first time Ge MOS characteristics with ultra thin rapid thermal CVD HfO2 gate dielectrics and TaN gate electrode. Using the newly developed pre- gate cleaning and NH3-based Ge surface

  12. Method and infrastructure for cycle-reproducible simulation on large scale digital circuits on a coordinated set of field-programmable gate arrays (FPGAs)

    DOE Patents [OSTI]

    Asaad, Sameh W; Bellofatto, Ralph E; Brezzo, Bernard; Haymes, Charles L; Kapur, Mohit; Parker, Benjamin D; Roewer, Thomas; Tierno, Jose A

    2014-01-28

    A plurality of target field programmable gate arrays are interconnected in accordance with a connection topology and map portions of a target system. A control module is coupled to the plurality of target field programmable gate arrays. A balanced clock distribution network is configured to distribute a reference clock signal, and a balanced reset distribution network is coupled to the control module and configured to distribute a reset signal to the plurality of target field programmable gate arrays. The control module and the balanced reset distribution network are cooperatively configured to initiate and control a simulation of the target system with the plurality of target field programmable gate arrays. A plurality of local clock control state machines reside in the target field programmable gate arrays. The local clock state machines are configured to generate a set of synchronized free-running and stoppable clocks to maintain cycle-accurate and cycle-reproducible execution of the simulation of the target system. A method is also provided.

  13. Learning About Wind Turbine Technology, Motors and Generators...

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

    I'll be talking to you about one of the latest subjects taught in the program's A course, Electric Machines. In a recent post, Dave Shoudy talked to you about the course on Power...

  14. Dr. Dave Danielson Assistant Secretary

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

    & Renewable Energy U.S. Department of Energy Mr. Bryan Dods Executive & Chief Engineer GE Power & Water Dr. Mark Johnson Director Advanced Manufacturing Office U.S. Department of...

  15. Deterministic and cascadable conditional phase gate for photonic qubits

    SciTech Connect (OSTI)

    Chudzicki, Christopher; Chuang, Isaac; Shapiro, Jeffrey H.

    2014-12-04

    Previous analyses of conditional ?{sub NL}-phase gates for photonic qubits that treat crossphase modulation (XPM) in a causal, multimode, quantum field setting suggest that a large (?? rad) nonlinear phase shift is always accompanied by fidelity-degrading noise [J. H. Shapiro, Phys. Rev. A 73, 062305 (2006); J. Gea-Banacloche, Phys. Rev. A 81, 043823 (2010)]. Using an atomic V-system to model an XPM medium, we present a conditional phase gate that, for sufficiently small nonzero ?{sub NL}, has high fidelity. The gate is made cascadable by using a special measurement, principal mode projection, to exploit the quantum Zeno effect and preclude the accumulation of fidelity-degrading departures from the principal-mode Hilbert space when both control and target photons illuminate the gate. The nonlinearity of the V-system we study is too weak for this particular implementation to be practical. Nevertheless, the idea of cascading through principal mode projection is of potential use to overcome fidelity degrading noise for a wide variety of nonlinear optical primitive gates.

  16. Decoherence and gate performance of coupled solid state qubits

    E-Print Network [OSTI]

    Markus J. Storcz; Frank K. Wilhelm

    2002-12-16

    Solid state quantum bits are promising candidates for the realization of a {\\em scalable} quantum computer. However, they are usually strongly limited by decoherence due to the many extra degrees of freedom of a solid state system. We investigate a system of two solid state qubits that are coupled via $\\sigma_z^{(i)} \\otimes \\sigma_z^{(j)}$ type of coupling. This kind of setup is typical for {\\em pseudospin} solid-state quantum bits such as charge or flux systems. We evaluate decoherence properties and gate quality factors in the presence of a common and two uncorrelated baths coupling to $\\sigma_z$, respectively. We show that at low temperatures, uncorrelated baths do degrade the gate quality more severely. In particular, we show that in the case of a common bath, optimum gate performance of a CPHASE gate can be reached at very low temperatures, because our type of coupling commutes with the coupling to the decoherence, which makes this type of coupling attractive as compared to previously studied proposals with $\\sigma_y^{(i)} \\otimes \\sigma_y^{(j)}$ -coupling. Although less pronounced, this advantage also applies to the CNOT gate.

  17. Distributed Generation

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

    Electricity, US Data. 6. Distributed Generation: Standby Generation and Cogeneration Ozz Energy Solutions, Inc. February 28 th , 2005. For more information about...

  18. An optical fusion gate for W-states

    E-Print Network [OSTI]

    Sahin Kaya Ozdemir; Eiji Matsunaga; Toshiyuki Tashima; Takashi Yamamoto; Masato Koashi; Nobuyuki Imoto

    2011-03-11

    We introduce a simple optical gate to fuse arbitrary size polarization entangled W-states to prepare larger W-states. The gate requires a polarizing beam splitter (PBS), a half wave plate (HWP) and two photon detectors. We study numerically and analytically the necessary resource consumption for preparing larger W-states by fusing smaller ones with the proposed fusion gate. We show analytically that resource requirement scales at most sub-exponentially with the increasing size of the state to be prepared. We numerically determine the resource cost for fusion without recycling where W-states of arbitrary size can be optimally prepared. Moreover, we introduce another strategy which is based on recycling and outperforms the optimal strategy for non-recycling case.

  19. Fabrication of a gated gallium arsenide heterostructure resonant tunneling diode 

    E-Print Network [OSTI]

    Kinard, William Brian

    1989-01-01

    , . ' 'CONTACT PAD' PLANAR I ZED POLYAM I DE RECTIFYI CONTACT N DBHS Pig. 2. f'utavvay vieiv of a gated gallium arsenide heterostructure resonant tunneling diode 1018 graded from 10 18 io" 10? (lightly doped) units=cm 8 ?graded from 10 to 18...FABRICATION OF A GATED GALLIL". tl ARSEXIDE HETEROSTRL CTL RF. RESONANT TF'XXELI'XG DIODE A Thesis bt ttrILLIAAI BRIA'. s KI'iARD Subnut ted to the Office of Graduate Studies of Texas AE;M Eniverstty tn partial fulfillment of the requirements...

  20. Self-aligned submicron gate length gallium arsenide MESFET 

    E-Print Network [OSTI]

    Huang, Hsien-Ching

    1987-01-01

    38 21. Proximity cap annealing . 22. Temperature profile of post implant anneal 46 47 23. 24. 25. 26. 27. 28. 29. 30. "Pits" or holes in GaAs post implant anneal without sacrificial cap Silicon monoxide source (bafile box) used.... 16(b)). The bottom resist layer is then further etched in the oxygen plasma to produce undercutting for the desire gate structure. The amount of undercut is determined by the desired length of the gate and is the width of the remaining resist...

  1. Gate-all-around silicon nanowire MOSFETs : top-down fabrication and transport enhancement techniques

    E-Print Network [OSTI]

    Hashemi, Pouya

    2010-01-01

    Scaling MOSFETs beyond 15 nm gate lengths is extremely challenging using a planar device architecture due to the stringent criteria required for the transistor switching. The top-down fabricated, gate-all-around architecture ...

  2. Quantum entanglement and controlled logical gates using coupled SQUID flux qubits

    E-Print Network [OSTI]

    Zhou, Zhongyuan; Han, Siyuan; Chu, Shih-I

    2005-06-01

    We present an approach to realize universal two-bit quantum gates using two SQUID flux qubits. In this approach the basic unit consists of two inductively coupled SQUIDs with realistic device parameters. Quantum logical gates are implemented...

  3. The civic forum in ancient Israel : the form, function, and symbolism of city gates

    E-Print Network [OSTI]

    Frese, Daniel Allan

    2012-01-01

    from the massive amounts of wood ash and burnt ceiling beamsand the presence of wood ash in some gate passages,

  4. Chemical Wave Logic Gates Oliver Steinbock, Petteri Kettunen, and Kenneth Showalter*

    E-Print Network [OSTI]

    Showalter, Kenneth

    Chemical Wave Logic Gates Oliver Steinbock, Petteri Kettunen, and Kenneth Showalter* Department Form: August 6, 1996X Logic gates based on chemical wave propagation in geometrically constrained. Computational studies of the serial coupling of elements to form multicomponent gates and general chemical wave

  5. PHYSICAL REVIEW B 90, 144504 (2014) Compressed sensing quantum process tomography for superconducting quantum gates

    E-Print Network [OSTI]

    Martinis, John M.

    2014-01-01

    for superconducting quantum gates Andrey V. Rodionov,1 Andrzej Veitia,1 R. Barends,2 J. Kelly,2 Daniel Sank,2 J quantum gates based on superconducting Xmon and phase qubits. Using experimental data for a two and Monte Carlo process certification have been demonstrated experimentally for superconducting qubit gates

  6. Tradeoffs between Gate Oxide Leakage and Delay for Dual ToxToxTox Circuits

    E-Print Network [OSTI]

    Sapatnekar, Sachin

    lead to gate oxide leakage current (Igate), are coming into play from the 90nm node onwards. AccordingTradeoffs between Gate Oxide Leakage and Delay for Dual ToxToxTox Circuits Anup Kumar Sultania Department of ECE University of Minnesota Minneapolis, MN 55455. sachin@ece.umn.edu ABSTRACT Gate oxide

  7. PHYSICAL REVIEW A 87, 052306 (2013) Protected gates for superconducting qubits

    E-Print Network [OSTI]

    Preskill, John

    2013-01-01

    PHYSICAL REVIEW A 87, 052306 (2013) Protected gates for superconducting qubits Peter Brooks, Alexei the accuracy of quantum phase gates acting on "0- qubits" in superconducting circuits, where the gates superconducting circuits for this purpose. Specifically, several authors [3­5] have proposed designs

  8. Case Studies on Clock Gating and Local Routign for VLSI Clock Mesh 

    E-Print Network [OSTI]

    Ramakrishnan, Sundararajan

    2010-10-12

    . This thesis deals with the introduction of 'reconfigurability' by using control structures like transmission gates between sub-clock meshes, thus enabling clock gating in clock mesh. By using the optimum value of size for PMOS and NMOS of transmission gate...

  9. An overview of the gate and panel industry 

    E-Print Network [OSTI]

    Fisher, C. West

    2000-01-01

    acquiring raw materials, its pre-fabrication, welding, touch-up, and delivery of the product. My first major responsibility for Texas Gate and Panel was to expand its sales territory. It soon became obvious that a thorough knowledge of my competitors...

  10. FLOATING GATE COMPARATOR WITH AUTOMATIC OFFSET MANIPULATION FUNCTIONALITY

    E-Print Network [OSTI]

    Maryland at College Park, University of

    a desired offset. We exploit the nega- tive feedback functionality of pFET hot-electron injection to achieve to this circuit node, so charge on this gate remains trapped for a very long time. In our comparator, the circuit offset is stored in this high-retention charge form, and altered by means of injection and tunneling

  11. Quantum Logic Gates in Superconducting Qubits John M. Martinis

    E-Print Network [OSTI]

    Martinis, John M.

    Quantum Logic Gates in Superconducting Qubits John M. Martinis Department of Physics University on surface codes may allow errors in the 10-2 range [2]. Much research in superconducting qubits has been di for superconducting qubits, since they typically use fixed coupling elements set by fabrication. TRANSITION LOGIC

  12. Gating and regulation of connexin 43 (Cx43) hemichannels

    E-Print Network [OSTI]

    Newman, Eric A.

    Gating and regulation of connexin 43 (Cx43) hemichannels Jorge E. Contreras* , Juan C. Sa Connexin 43 (Cx43) nonjunctional or ``unapposed'' hemichannels can open under physiological or pathological conditions. We char- acterize hemichannels comprised of Cx43 or Cx43-EGFP (Cx43 with enhanced GFP fused

  13. Clustering of cyclic-nucleotide-gated channels in olfactory cilia

    E-Print Network [OSTI]

    French, Donald A.

    Cincinnati, OH 45267-0667, USA 513-558-6099 513-558-2727 FAX steve@syrano.acb.uc.edu Running title: CNG of olfactory signal transduction, including a high density of cyclic-nucleotide-gated (CNG) channels. CNG the locations of CNG channels along the length may be important in determining the sensitivity of odor detection

  14. Three-qubit phase gate based on cavity quantum electrodynamics 

    E-Print Network [OSTI]

    Chang, Jun-Tao; Zubairy, M. Suhail

    2008-01-01

    We describe a three-qubit quantum phase gate which is implemented by passing a four-level atom in a cascade configuration initially in its ground state through a three-mode optical cavity. The three qubits are represented by the photons in the three...

  15. Optical gating of perylene bisimide fluorescence using dithienylcyclopentene photochromic switches

    SciTech Connect (OSTI)

    Pärs, Martti; Köhler, Jürgen, E-mail: juergen.koehler@uni-bayreuth.de [Experimental Physics IV, University of Bayreuth, 95440 Bayreuth (Germany)] [Experimental Physics IV, University of Bayreuth, 95440 Bayreuth (Germany); Gräf, Katja; Bauer, Peter; Thelakkat, Mukundan [Applied Functional Polymers, University of Bayreuth, 95440 Bayreuth (Germany)] [Applied Functional Polymers, University of Bayreuth, 95440 Bayreuth (Germany)

    2013-11-25

    The emission of millions of fluorescence photons from a chromophore is controlled by the absorption of a few tens of photons in a photochromic molecule. The parameters that determine the efficiency of this process are investigated, providing insights for the development of an all-optical gate.

  16. Temperature-controlled molecular depolarization gates in nuclear magnetic resonance

    SciTech Connect (OSTI)

    Schroder, Leif; Schroder, Leif; Chavez, Lana; Meldrum, Tyler; Smith, Monica; Lowery, Thomas J.; E. Wemmer, David; Pines, Alexander

    2008-02-27

    Down the drain: Cryptophane cages in combination with selective radiofrequency spin labeling can be used as molecular 'transpletor' units for transferring depletion of spin polarization from a hyperpolarized 'source' spin ensemble to a 'drain' ensemble. The flow of nuclei through the gate is adjustable by the ambient temperature, thereby enabling controlled consumption of hyperpolarization.

  17. Design, Simulation and Modeling of Insulated Gate Bipolar Transistor 

    E-Print Network [OSTI]

    Gupta, Kaustubh

    2013-07-09

    The market for Insulated Gate Bipolar Transistor (IGBT) is growing and there is a need for techniques to improve the design, modeling and simulation of IGBT. In this thesis, we first developed a new method to optimize the layout and dimensions...

  18. TECH FORUM: [VERIFIED RTL TO GATES] Efficient RC power grid

    E-Print Network [OSTI]

    Najm, Farid N.

    TECH FORUM: [VERIFIED RTL TO GATES] Efficient RC power grid verification using node elimination proposes a novel approach to systematically reduce the power grid and accurately compute an upper bound on the voltage drops at power grid nodes that are retained. Furthermore, acriterion for the safety of nodes

  19. A Gate Level Sensor Network for Integrated Circuits Temperature Monitoring

    E-Print Network [OSTI]

    Potkonjak, Miodrag

    A Gate Level Sensor Network for Integrated Circuits Temperature Monitoring Alireza Vahdatpour, Saro and temporal) temperature monitoring allows several run-time optimizations. Protecting shared processors from, miodrag}@cs.ucla.edu Abstract-- We present the first sensor network architecture to monitor integrated

  20. Gating of high-mobility InAs metamorphic heterostructures

    SciTech Connect (OSTI)

    Shabani, J.; McFadden, A. P.; Shojaei, B.; Palmstrøm, C. J.

    2014-12-29

    We investigate the performance of gate-defined devices fabricated on high mobility InAs metamorphic heterostructures. We find that heterostructures capped with In{sub 0.75}Ga{sub 0.25}As often show signs of parallel conduction due to proximity of their surface Fermi level to the conduction band minimum. Here, we introduce a technique that can be used to estimate the density of this surface charge that involves cool-downs from room temperature under gate bias. We have been able to remove the parallel conduction under high positive bias, but achieving full depletion has proven difficult. We find that by using In{sub 0.75}Al{sub 0.25}As as the barrier without an In{sub 0.75}Ga{sub 0.25}As capping, a drastic reduction in parallel conduction can be achieved. Our studies show that this does not change the transport properties of the quantum well significantly. We achieved full depletion in InAlAs capped heterostructures with non-hysteretic gating response suitable for fabrication of gate-defined mesoscopic devices.

  1. From quantum pulse gate to quantum pulse shaper -- enigneered frequency conversion in nonlinear optical waveguides

    E-Print Network [OSTI]

    Benjamin Brecht; Andreas Eckstein; Andreas Christ; Hubertus Suche; Christine Silberhorn

    2011-07-28

    Full control over the spatio-temporal structure of quantum states of light is an important goal in quantum optics, to generate for instance single-mode quantum pulses or to encode information on multiple modes, enhancing channel capacities. Quantum light pulses feature an inherent, rich spectral broadband-mode structure. In recent years, exploring the use of integrated optics as well as source-engineering has led to a deep understanding of the pulse-mode structure of guided quantum states of light. In addition, several groups have started to investigate the manipulation of quantum states by means of single-photon frequency conversion. In this paper we explore new routes towards complete control of the inherent pulse-modes of ultrafast pulsed quantum states by employing specifically designed nonlinear waveguides with adapted dispersion properties. Starting from our recently proposed quantum pulse gate (QPG) we further generalize the concept of spatio-spectral engineering for arbitrary $\\chitwo$-based quantum processes. We analyse the sum-frequency generation based QPG and introduce the difference-frequency generation based quantum pulse shaper (QPS). Together, these versatile and robust integrated optics devices allow for arbitrary manipulations of the pulse-mode structure of ultrafast pulsed quantum states. The QPG can be utilized to select an arbitrary pulse mode from a multimode input state, whereas the QPS enables the generation of specific pulse modes from an input wavepacket with Gaussian-shaped spectrum.

  2. Ultrafast gated intensifier design for laser fusion x-ray framing applications

    SciTech Connect (OSTI)

    Price, R.H.; Wiedwald, J.D.; Kalibjian, R.; Thomas, S.W.; Cook, W.M.

    1983-11-01

    A major challenge for laser fusion is the study of the symmetry and the hydrodynamic stability of imploding fuel capsules. Streaked x-radiography, in one space and one time dimension, does not provide sufficient information. Two (spatial) dimensional frames of 10 to 100 ps duration are required with good image quality, minimum geometrical distortion (approximately 1%), dynamic range greater than 1000 and greater than 200 x 200 pixels. A gated transmission line imager (TLI) can meet these requirements with frame times between 30 and 100 ps. An instrument of this type is now being developed. Progress on this instrument including theory of operation, ultrafast pulse generation and propagation, component integration, and high resolution phosphor screen development are presented.

  3. Single photoelectron spin detection and angular momentum transfer in a gate defined quantum dot

    E-Print Network [OSTI]

    Takafumi Fujita; Kazuhiro Morimoto; Haruki Kiyama; Giles Allison; Marcus Larsson; Arne Ludwig; Sascha R. Valentin; Andreas D. Wieck; Akira Oiwa; Seigo Tarucha

    2015-04-14

    Recent innovations in fabricating nanoscale confined spin systems have enabled investigation of fundamental quantum correlations between single quanta of photons and matter states. Realization of quantum state transfer from photon polarization to electron spin using gate defined quantum dots (QDs) may give evidence of preserved coherence of angular momentum basis states at the photon-spin interface. The interface would enlarge the concept of quantum information technology, in which single photogenerated electron spins are manipulated with the dots, but this remains a serious challenge. Here, we report the detection of single electron spins generated by polarized single photons via a double QD (DQD) to verify the angular momentum transfer from single photons to single electrons. Pauli spin blockade (PSB) is used to project the photoelectron spin state onto the up or down spin state. Our result promises the realization of coherent quantum state transfer and development of hybrid photon and spin quantum technology.

  4. Short range, ultra-wideband radar with high resolution swept range gate

    DOE Patents [OSTI]

    McEwan, T.E.

    1998-05-26

    A radar range finder and hidden object locator is based on ultra-wide band radar with a high resolution swept range gate. The device generates an equivalent time amplitude scan with a typical range of 4 inches to 20 feet, and an analog range resolution as limited by a jitter of on the order of 0.01 inches. A differential sampling receiver is employed to effectively eliminate ringing and other aberrations induced in the receiver by the near proximity of the transmit antenna, so a background subtraction is not needed, simplifying the circuitry while improving performance. Uses of the invention include a replacement of ultrasound devices for fluid level sensing, automotive radar, such as cruise control and parking assistance, hidden object location, such as stud and rebar finding. Also, this technology can be used when positioned over a highway lane to collect vehicle count and speed data for traffic control. 14 figs.

  5. Short range, ultra-wideband radar with high resolution swept range gate

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1998-05-26

    A radar range finder and hidden object locator is based on ultra-wide band radar with a high resolution swept range gate. The device generates an equivalent time amplitude scan with a typical range of 4 inches to 20 feet, and an analog range resolution as limited by a jitter of on the order of 0.01 inches. A differential sampling receiver is employed to effectively eliminate ringing and other aberrations induced in the receiver by the near proximity of the transmit antenna, so a background subtraction is not needed, simplifying the circuitry while improving performance. Uses of the invention include a replacement of ultrasound devices for fluid level sensing, automotive radar, such as cruise control and parking assistance, hidden object location, such as stud and rebar finding. Also, this technology can be used when positioned over a highway lane to collect vehicle count and speed data for traffic control.

  6. Electron-beam patterning of polymer electrolyte films to make multiple nanoscale gates for nanowire transistors

    E-Print Network [OSTI]

    D. J. Carrad; A. M. Burke; R. W. Lyttleton; H. J. Joyce; H. H. Tan; C. Jagadish; K. Storm; H. Linke; L. Samuelson; A. P. Micolich

    2014-04-08

    We report an electron-beam based method for the nanoscale patterning of the poly(ethylene oxide)/LiClO$_{4}$ polymer electrolyte. We use the patterned polymer electrolyte as a high capacitance gate dielectric in single nanowire transistors and obtain subthreshold swings comparable to conventional metal/oxide wrap-gated nanowire transistors. Patterning eliminates gate/contact overlap which reduces parasitic effects and enables multiple, independently controllable gates. The method's simplicity broadens the scope for using polymer electrolyte gating in studies of nanowires and other nanoscale devices.

  7. Bell's Inequality and Universal Quantum Gates in a Cold-Atom Chiral Fermionic p-Wave Superfluid

    SciTech Connect (OSTI)

    Zhang Chuanwei; Tewari, Sumanta; Das Sarma, S.

    2007-11-30

    We propose and analyze a probabilistic scheme to entangle two spatially separated topological qubits in a p{sub x}+ip{sub y} superfluid using controlled collisions between atoms in movable dipole traps and unpaired atoms inside vortex cores in the superfluid. We discuss how to test the violation of Bell's inequality with the generated entanglement. A set of universal quantum gates is shown to be implementable deterministically using the entanglement despite the fact that the entangled states can be created only probabilistically.

  8. Electrochemical Cell Design With A Hollow Gate

    DOE Patents [OSTI]

    Romero, Antonio (Parkton, MD); Oweis, Salah (Ellicott City, MD); Chagnon, Guy (Columbia, MD); Staniewicz, Robert (Hunt Valley, MD); Briscoe, Douglas (Westminster, MD)

    2000-02-01

    An electrochemical cell having a spiral winding around a central core, wherein the central core is provided with longitudinal grooves on its outer surface to facilitate electrolyte filing and accommodate overpressure. The core itself improves dissipation of heat generated along the center of the cell, and the hollow core design allows the cell core to have a larger radius, permitting the "jelly roll" winding to begin at a larger radius and thereby facilitate the initial turns of the winding by decreasing the amount of bending required of the electrode laminate at the beginning of the winding operation. The hollow core also provides mechanical support end-to-end. A pair of washers are used at each end of the cell to sandwich current collection tabs in a manner that improves electrical and thermal conductivity while also providing structural integrity.

  9. Compact Models for Future Generation CMOS

    E-Print Network [OSTI]

    Lu, Darsen Duane

    2011-01-01

    architecture with high-k gate dielectrics, metal gates and strain engineering,” in Digest of Technical Papers, Symposium on VLSI Technology,

  10. Gate-Tunable Graphene Quantum Dot and Dirac Oscillator

    E-Print Network [OSTI]

    Abdelhadi Belouad; Ahmed Jellal; Youness Zahidi

    2015-05-29

    We obtain the solution of the Dirac equation in (2+1) dimensions in the presence of a constant magnetic field normal to the plane together with a two-dimensional Dirac-oscillator potential coupling. We study the energy spectrum of graphene quantum dot (QD) defined by electrostatic gates. We give discussions of our results based on different physical settings, whether the cyclotron frequency is similar or larger/smaller compared to the oscillator frequency. This defines an effective magnetic field that produces the effective quantized Landau levels. We study analytically such field in gate-tunable graphene QD and show that our structure allow us to control the valley degeneracy. Finally, we compare our results with already published work and also discuss the possible applications of such QD.

  11. Gate-Tunable Graphene Quantum Dot and Dirac Oscillator

    E-Print Network [OSTI]

    Belouad, Abdelhadi; Zahidi, Youness

    2015-01-01

    We obtain the solution of the Dirac equation in (2+1) dimensions in the presence of a constant magnetic field normal to the plane together with a two-dimensional Dirac-oscillator potential coupling. We study the energy spectrum of graphene quantum dot (QD) defined by electrostatic gates. We give discussions of our results based on different physical settings, whether the cyclotron frequency is similar or larger/smaller compared to the oscillator frequency. This defines an effective magnetic field that produces the effective quantized Landau levels. We study analytically such field in gate-tunable graphene QD and show that our structure allow us to control the valley degeneracy. Finally, we compare our results with already published work and also discuss the possible applications of such QD.

  12. High Fidelity Quantum Gates in the Presence of Dispersion

    E-Print Network [OSTI]

    Botan Khani; Seth T. Merkel; Felix Motzoi; Jay M. Gambetta; Frank K. Wilhelm

    2011-11-07

    We numerically demonstrate the control of motional degrees of freedom of an ensemble of neutral atoms in an optical lattice with a shallow trapping potential. Taking into account the range of quasimomenta across different Brillouin zones results in an ensemble whose members effectively have inhomogeneous control fields as well as spectrally distinct control Hamiltonians. We present an ensemble-averaged optimal control technique that yields high fidelity control pulses, irrespective of quasimomentum, with average fidelities above 98%. The resulting controls show a broadband spectrum with gate times in the order of several free oscillations to optimize gates with up to 13.2% dispersion in the energies from the band structure. This can be seen as a model system for the prospects of robust quantum control. This result explores the limits of discretizing a continuous ensemble for control theory.

  13. Quantum gate using qubit states separated by terahertz

    SciTech Connect (OSTI)

    Toyoda, Kenji; Urabe, Shinji [Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531 (Japan); JST-CREST, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012 (Japan); Haze, Shinsuke [Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531 (Japan); Yamazaki, Rekishu [JST-CREST, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012 (Japan)

    2010-03-15

    A two-qubit quantum gate is realized using electronically excited states in a single ion with an energy separation on the order of a terahertz times the Planck constant as a qubit. Two phase-locked lasers are used to excite a stimulated Raman transition between two metastable states D{sub 3/2} and D{sub 5/2} separated by 1.82 THz in a single trapped {sup 40}Ca{sup +} ion to construct a qubit, which is used as the target bit for the Cirac-Zoller two-qubit controlled NOT gate. Quantum dynamics conditioned on a motional qubit is clearly observed as a fringe reversal in Ramsey interferometry.

  14. High image quality sub 100 picosecond gated framing camera development

    SciTech Connect (OSTI)

    Price, R.H.; Wiedwald, J.D.

    1983-11-17

    A major challenge for laser fusion is the study of the symmetry and hydrodynamic stability of imploding fuel capsules. Framed x-radiographs of 10-100 ps duration, excellent image quality, minimum geometrical distortion (< 1%), dynamic range greater than 1000, and more than 200 x 200 pixels are required for this application. Recent progress on a gated proximity focused intensifier which meets these requirements is presented.

  15. Amorphorized tantalum-nickel binary films for metal gate applications

    SciTech Connect (OSTI)

    Ouyang, Jiaomin; Wongpiya, Ranida; Clemens, Bruce M.; Deal, Michael D.; Nishi, Yoshio

    2015-04-13

    Amorphous metal gates have the potential to eliminate the work function variation due to grain orientation for poly-crystalline metal gate materials, which is a leading contributor to threshold voltage variation for small transistors. Structural and electrical properties of TaNi alloys using co-sputtering with different compositions and multilayer structures with different thicknesses are investigated in this work. It is found that TaNi films are amorphous for a wide range of compositions as deposited, and the films stay amorphous after annealing at 400?°C in RTA for 1?min and up to at least 700?°C depending on the composition. The amorphous films eventually crystallize into Ni, Ta, and TaNi{sub 3} phases at high enough temperature. For multilayer Ta/Ni structures, samples with individual layer thickness of 0.12?nm and 1.2?nm are amorphous as deposited due to intermixing during deposition, and stay amorphous until annealed at 500?°C. The resistivity of the films as-deposited are around 200 ??·cm. The work function of the alloy is fixed at close to the Ta work function of 4.6?eV for a wide range of compositions. This is attributed to the segregation of Ta at the metal-oxide interface, which is confirmed by XPS depth profile. Overall, the excellent thermal stability and low resistivity makes this alloy system a promising candidate for eliminating work function variation for gate last applications, as compared to crystalline Ta or TiN gates.

  16. GATE: Energy Efficient Vehicles for Sustainable Mobility | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,Executive Compensation References: FAR 31.205-6Applications |Energy GATE:

  17. Distributed generation

    SciTech Connect (OSTI)

    Ness, E.

    1999-09-02

    Distributed generation, locating electricity generators close to the point of consumption, provides some unique benefits to power companies and customers that are not available from centralized electricity generation. Photovoltaic (PV) technology is well suited to distributed applications and can, especially in concert with other distributed resources, provide a very close match to the customer demand for electricity, at a significantly lower cost than the alternatives. In addition to augmenting power from central-station generating plants, incorporating PV systems enables electric utilities to optimize the utilization of existing transmission and distribution.

  18. Single qubit gates in frequency-crowded transmon systems

    E-Print Network [OSTI]

    R. Schutjens; F. Abu Dagga; D. J. Egger; F. K. Wilhelm

    2013-06-10

    Recent experimental work on superconducting transmon qubits in 3D cavities show that their coherence times are increased by an order of magnitude compared to their 2D cavity counterparts. However to take advantage of these coherence times while scaling up the number of qubits it is advantageous to address individual qubits which are all coupled to the same 3D cavity fields. The challenge in controlling this system comes from spectral crowding, where leakage transition of qubits are close to computational transitions in other. Here it is shown that fast pulses are possible which address single qubits using two quadrature control of the pulse envelope while the DRAG method alone only gives marginal improvements over the conventional Gaussian pulse shape. On the other hand, a first order result using the Magnus expansion gives a fast analytical pulse shape which gives a high fidelity gate for a specific gate time, up to a phase factor on the second qubit. Further numerical analysis corroborates these results and yields to even faster gates, showing that leakage state anharmonicity does not provide a fundamental quantum speed limit.

  19. Use of a hard mask for formation of gate and dielectric via nanofilament field emission devices

    DOE Patents [OSTI]

    Morse, Jeffrey D. (Martinez, CA); Contolini, Robert J. (Lake Oswego, OR)

    2001-01-01

    A process for fabricating a nanofilament field emission device in which a via in a dielectric layer is self-aligned to gate metal via structure located on top of the dielectric layer. By the use of a hard mask layer located on top of the gate metal layer, inert to the etch chemistry for the gate metal layer, and in which a via is formed by the pattern from etched nuclear tracks in a trackable material, a via is formed by the hard mask will eliminate any erosion of the gate metal layer during the dielectric via etch. Also, the hard mask layer will protect the gate metal layer while the gate structure is etched back from the edge of the dielectric via, if such is desired. This method provides more tolerance for the electroplating of a nanofilament in the dielectric via and sharpening of the nanofilament.

  20. A simple trapped-ion architecture for high-fidelity Toffoli gates

    E-Print Network [OSTI]

    Massimo Borrelli; Laura Mazzola; Mauro Paternostro; Sabrina Maniscalco

    2010-12-08

    We discuss a simple architecture for a quantum Toffoli gate implemented using three trapped ions. The gate, which in principle can be implemented with a single laser-induced operation, is effective under rather general conditions and is strikingly robust (within any experimentally realistic range of values) against dephasing, heating and random fluctuations of the Hamiltonian parameters. We provide a full characterization of the unitary and noise-affected gate using three-qubit quantum process tomography.

  1. Next Generation Radioisotope Generators | Department of Energy

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

    Generators Next Generation Radioisotope Generators Advanced Stirling Radioisotope Generator (ASRG) - The ASRG is currently being developed as a high-efficiency RPS technology...

  2. How to Successfully Implement a Knowledge Management System for the Mechanical Engineering Department at Gating Incorporated

    E-Print Network [OSTI]

    Mudd, John

    2009-05-15

    , utilizing some of the strategies, for the implementation of a Knowledge Management System for the Mechanical Engineering Department at Gating Incorporated....

  3. A Surprising Clarification of the Mechanism of Ion-channel Voltage-Gating

    E-Print Network [OSTI]

    Ashok Palaniappan

    2011-04-20

    An intense controversy has surrounded the mechanism of voltage-gating in ion channels. We interpreted the two leading models of voltage-gating with respect to the thermodynamic energetics of membrane insertion of the voltage-sensing 'module' from a comprehensive set of potassium channels. KvAP is an archaeal voltage-gated potassium channel whose x-ray structure was the basis for determining the general mechanism of voltage-gating. The free energy of membrane insertion of the KvAP voltage sensor was revealed to be a single outlier. This was due to its unusual sequence that facilitated large gating movements in its native lipid membrane. This degree of free energy was the least typical of the other voltage sensors, including the Shaker potassium channel. We inferred that the two leading models of voltage-gating referred to alternative mechanisms of voltage-gating: each is applicable to an independent set of ion channels. The large motion of the voltage-sensor during gating proposed by the KvAP-paddle model of gating is unlikely to be mirrored by the majority of ion channels whose voltage sensors are not located at the membrane-cytoplasm interface in the channel closed state.

  4. Sandia Energy - ECIS and i-GATE: Innovation Hub Connects Clean...

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

    support system to accelerate the commercialization of innovative technologies related to green transportation and clean energy. There are now eight i-GATE clients developing fuel...

  5. Low Power 8T SRAM Using 32nm Independent Gate FinFET Young Bok Kim

    E-Print Network [OSTI]

    Ayers, Joseph

    by the process, but also it can be controlled by the back gate voltage (VGb). This is similar to the body effect

  6. Implementing a neutral-atom controlled-phase gate with a single Rydberg pulse

    E-Print Network [OSTI]

    Rui Han; Hui Khoon Ng; Berthold-Georg Englert

    2014-09-04

    One can implement fast two-qubit entangling gates by exploiting the Rydberg blockade. Although various theoretical schemes have been proposed, experimenters have not yet been able to demonstrate two-atom gates of high fidelity due to experimental constraints. We propose a novel scheme, which only uses a single Rydberg pulse, for the construction of neutral-atom controlled-phase gates. In contrast to the existing schemes, our scheme is simpler to implement and requires neither individual addressing of atoms nor adiabatic procedures. With realistically estimated experimental parameters, a gate fidelity higher than 0.99 is achievable.

  7. Bill Gates and Deputy Secretary Poneman Discuss the Energy Technology Landscape

    Office of Energy Efficiency and Renewable Energy (EERE)

    Bill Gates and Deputy Secretary of Energy Daniel Poneman discuss the future of energy technology during the twenty-second Plenary Meeting of the Nuclear Suppliers Group.

  8. Local implementations of non-local quantum gates in linear entangled channel

    E-Print Network [OSTI]

    Debashis Saha; Sanket Nandan; Prasanta K. Panigrahi

    2014-08-03

    In this paper, we demonstrate n-party controlled unitary gate implementations locally on arbitrary remote state through linear entangled channel where control parties share entanglement with the adjacent control parties and only one of them shares entanglement with the target party. In such a network, we describe the protocol of simultaneous implementation of controlled-Hermitian gate starting from three party scenario. We also explicate the implementation of three party controlled-Unitary gate, a generalized form of To?oli gate and subsequently generalize the protocol for n-party using minimal cost.

  9. Nonadiabatic molecular orientation by polarization-gated ultrashort laser pulses

    SciTech Connect (OSTI)

    Chen Cheng; Wu Jian; Zeng Heping [State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062 (China)

    2010-09-15

    We show that the nonadiabatic orientation of diatomic polar molecules can be controlled by polarization-gated ultrashort laser pulses. By finely adjusting the time interval between two circularly polarized pulses of different wavelengths but the same helicity, the orientation direction of the molecules can be twirled. A cloverlike potential is created by using two circularly polarized laser pulses of different wavelengths and opposite helicity, leading to multidirectional molecular orientation along the potential wells, which can be well revealed by a high-order statistics metric of <>.

  10. Gates County, North Carolina: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainable UrbanKentucky: Energy ResourcesMaui Area (DOEMaui AreaGastonGates County,

  11. Gates Mills, Ohio: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainable UrbanKentucky: Energy ResourcesMaui Area (DOEMaui AreaGastonGates

  12. Gate Hours & Services | Stanford Synchrotron Radiation Lightsource

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFESOpportunities Nuclearlong version)shortGate Hours & Services

  13. Looking at Transistor Gate Oxide Formation in Real Time

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResourcelogo and-E CChinaC L SLooking at Transistor Gate

  14. SU-E-J-45: Design and Study of An In-House Respiratory Gating Phantom Platform for Gated Radiotherapy

    SciTech Connect (OSTI)

    Senthilkumar, S

    2014-06-01

    Purpose: The main purpose of this work was to develop an in-house low cost respiratory motion phantom platform for testing the accuracy of the gated radiotherapy system and analyze the dosimetric difference during gated radiotherapy. Methods: An in-house respiratory motion platform(RMP) was designed and constructed for testing the targeting accuracy of respiratory tracking system. The RMP consist of acrylic Chest Wall Platform, 2 DC motors, 4 IR sensors, speed controller circuit, 2 LED and 2 moving rods inside the RMP. The velocity of the movement can be varied from 0 to 30 cycles per minute. The platform mounted to a base using precision linear bearings. The base and platform are made of clear, 15mm thick polycarbonate plastic and the linear ball bearings are oriented to restrict the platform to a movement of approximately 50mm up and down with very little friction. Results: The targeting accuracy of the respiratory tracking system was evaluated using phantom with and without respiratory movement with varied amplitude. We have found the 5% dose difference to the PTV during the movement in comparison with stable PTV. The RMP can perform sinusoidal motion in 1D with fixed peak to peak motion of 5 to 50mm and cycle interval from 2 to 6 seconds. The RMP was designed to be able to simulate the gross anatomical anterior posterior motion attributable to respiration-induced motion of the thoracic region. Conclusion: The unique RMP simulates breathing providing the means to create a comprehensive program for commissioning, training, quality assurance and dose verification of gated radiotherapy treatments. Create the anterior/posterior movement of a target over a 5 to 50 mm distance to replicate tumor movement. The targeting error of the respiratory tracking system is less than 1.0 mm which shows suitable for clinical treatment with highly performance.

  15. Investigation of hole mobility in gate-all-around Si nanowire p-MOSFETs with high-k/metal-gate: Effects of hydrogen thermal annealing and nanowire shape

    E-Print Network [OSTI]

    Hashemi, Pouya

    A detailed study of hole mobility is presented for gate-all-around Si nanowire p-MOSFETs with conformal high-?/MG and various high-temperature hydrogen annealing processes. Hole mobility enhancement relative to planar SOI ...

  16. Workshop on gate valve pressure locking and thermal binding

    SciTech Connect (OSTI)

    Brown, E.J.

    1995-07-01

    The purpose of the Workshop on Gate Valve Pressure Locking and Thermal Binding was to discuss pressure locking and thermal binding issues that could lead to inoperable gate valves in both boiling water and pressurized water reactors. The goal was to foster exchange of information to develop the technical bases to understand the phenomena, identify the components that are susceptible, discuss actual events, discuss the safety significance, and illustrate known corrective actions that can prevent or limit the occurrence of pressure locking or thermal binding. The presentations were structured to cover U.S. Nuclear Regulatory Commission staff evaluation of operating experience and planned regulatory activity; industry discussions of specific events, including foreign experience, and efforts to determine causes and alleviate the affects; and valve vendor experience and recommended corrective action. The discussions indicated that identifying valves susceptible to pressure locking and thermal binding was a complex process involving knowledge of components, systems, and plant operations. The corrective action options are varied and straightforward.

  17. Constructing Quantum Logic Gates Using q-Deformed Harmonic Oscillator Algebras

    E-Print Network [OSTI]

    Azmi Ali Altintas; Fatih Ozaydin; Can Yesilyurt; Sinan Bugu; Metin Arik

    2015-04-23

    We study two-level q-deformed angular momentum states and us- ing q-deformed harmonic oscillators, we provide a framework for con- structing qubits and quantum gates. We also present the construction of some basic quantum gates including CNOT, SWAP, Toffoli and Fredkin.

  18. Z-Gate Operation on a Superconducting Flux Qubit via Its Readout SQUID

    E-Print Network [OSTI]

    Jin, X.?Y.

    Detuning a superconducting qubit from its rotating frame is one means to implement a Z-gate operation. In this work, we implement a Z gate by pulsing a current through the qubit’s readout dc SQUID. While the dc SQUID acts ...

  19. Gating Currents from Kv7 Channels Carrying Neuronal Hyperexcitability Mutations in the Voltage-Sensing Domain

    E-Print Network [OSTI]

    Bezanilla, Francisco

    unable to provide a detailed assessment of the structural rearrangements underlying channel gating.2 channels both functionally and structurally, were used for these experiments. The data obtained showed activation of gating-pore currents at depolarized potentials. These results reveal that distinct molecular

  20. THE SMALL SIGNAL AMPLIFICATION OF THE GATED DIODE OPERATED IN BREAKDOWN REGIME

    E-Print Network [OSTI]

    capacitance of approximately 4pF. Figure 1 - Cross section of the gated diode. The device was fabricated impedance given by the pn junction avalanche regime. The cross section of the utilized device is presented and the area of the gate gives a capacitance of approximately 4pF. 2. DC Measurements In order to set the bias

  1. [ ]February 2014 The original 1957 Gates pile driving formula is an empirically derived dynamic formula

    E-Print Network [OSTI]

    Harms, Kyle E.

    [ ]February 2014 PROBLEM The original 1957 Gates pile driving formula is an empirically derived dynamic formula that is used to predict pile capacity in the field during pile installation.The original Gates formula tends to over-predict pile capacity for low driving resistances and under-predict pile

  2. Fig. 1. Schematic of gating operation driven by centrifugal force. (a) shows top view of the

    E-Print Network [OSTI]

    Banerjee, Debjyoti

    R1 R2 (a) Pm (b) Fig. 1. Schematic of gating operation driven by centrifugal force. (a) shows top-expanding opening. Liquid pressure at the meniscus is Pm. DESIGN ANALYSES OF CAPILLARY BURST VALVES IN CENTRIFUGAL, Capillary Gating, Centrifugal force, FlumeCAD I. Introduction There is a wide interest in micron

  3. Quantum Process Tomography of a Universal Entangling Gate Implemented with Josephson Phase Qubits

    E-Print Network [OSTI]

    Martinis, John M.

    . Experiments using superconducting qubits have validated the truth table for particular implementations of e the performance of a universal entangling gate between two superconducting quantum bits. Process tomography . The SQiSW is a "natural" two-qubit gate as it directly results from capacitive coupling of superconducting

  4. Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing

    E-Print Network [OSTI]

    Martinis, John M.

    Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum circuits, and is compatible with microfabrication. For superconducting qubits the surface code7 99%. Here, we demonstrate a universal set of logic gates in a superconducting multi-qubit processor

  5. Microfluidic logic gates and timers{ Michael W. Toepke, Vinay V. Abhyankar and David J. Beebe*

    E-Print Network [OSTI]

    Beebe, David J.

    Microfluidic logic gates and timers{ Michael W. Toepke, Vinay V. Abhyankar and David J. Beebe to create a number of microfluidic analogs to electronic circuit components. Three classes of components are demonstrated: (1) OR/AND, NOR/NAND, and XNOR digital microfluidic logic gates; (2) programmable, autonomous

  6. Gated frequency-resolved optical imaging with an optical parametric amplifier

    DOE Patents [OSTI]

    Cameron, Stewart M. (Albuquerque, NM); Bliss, David E. (Tijeras, NM); Kimmel, Mark W. (Edgewood, NM); Neal, Daniel R. (Tijeras, NM)

    1999-01-01

    A system for detecting objects in a turbid media utilizes an optical parametric amplifier as an amplifying gate for received light from the media. An optical gating pulse from a second parametric amplifier permits the system to respond to and amplify only ballistic photons from the object in the media.

  7. Gated frequency-resolved optical imaging with an optical parametric amplifier

    DOE Patents [OSTI]

    Cameron, S.M.; Bliss, D.E.; Kimmel, M.W.; Neal, D.R.

    1999-08-10

    A system for detecting objects in a turbid media utilizes an optical parametric amplifier as an amplifying gate for received light from the media. An optical gating pulse from a second parametric amplifier permits the system to respond to and amplify only ballistic photons from the object in the media. 13 figs.

  8. STANDARD OPERATING PROCEDURE FOR TUBE "A1-GateOx" furnace in TRL.

    E-Print Network [OSTI]

    Reif, Rafael

    STANDARD OPERATING PROCEDURE FOR TUBE "A1-GateOx" furnace in TRL. INTRODUCTION Tube "A1-Gate. Three Eurotherm temperature controllers provide a 20 inch long, flat profile in the Center Zone the special heat resistant gloves to handle those parts PROCEDURE. 1) "ENGAGE" the machine in CORAL for TRL

  9. Graphene field-effect transistors based on boron nitride gate dielectrics Inanc Meric1

    E-Print Network [OSTI]

    Shepard, Kenneth

    Graphene field-effect transistors based on boron nitride gate dielectrics Inanc Meric1 , Cory Dean1, 10027 Tel: (212) 854-2529, Fax: (212) 932-9421, Email: shepard@ee.columbia.edu Abstract Graphene field of graphene, as the gate dielectric. The devices ex- hibit mobility values exceeding 10,000 cm2 /V

  10. Nanocrystals Embedded Zirconium-doped Hafnium Oxide High-k Gate Dielectric Films 

    E-Print Network [OSTI]

    Lin, Chen-Han

    2012-10-19

    nanoparticles. These results can be important to the novel metal gate/high-k/Si MOS structure. The Ru-modified ZrHfO gate dielectric film showed a large breakdown voltage and a long lifetime. The conventional polycrystalline Si (poly-Si) charge trapping layer...

  11. Sulfur surface chemistry on the platinum gate of a silicon carbide based hydrogen sensor

    E-Print Network [OSTI]

    Tobin, Roger G.

    Sulfur surface chemistry on the platinum gate of a silicon carbide based hydrogen sensor Yung Ho September 2007 We have investigated the effects of sulfur contamination on a Pt-gate silicon carbide based monitoring, solid-oxide fuel cells, and coal gasification, require operation at much higher temperatures than

  12. Coherent molecular transistor: Control through variation of the gate wave function

    SciTech Connect (OSTI)

    Ernzerhof, Matthias

    2014-03-21

    In quantum interference transistors (QUITs), the current through the device is controlled by variation of the gate component of the wave function that interferes with the wave function component joining the source and the sink. Initially, mesoscopic QUITs have been studied and more recently, QUITs at the molecular scale have been proposed and implemented. Typically, in these devices the gate lead is subjected to externally adjustable physical parameters that permit interference control through modifications of the gate wave function. Here, we present an alternative model of a molecular QUIT in which the gate wave function is directly considered as a variable and the transistor operation is discussed in terms of this variable. This implies that we specify the gate current as well as the phase of the gate wave function component and calculate the resulting current through the source-sink channel. Thus, we extend on prior works that focus on the phase of the gate wave function component as a control parameter while having zero or certain discrete values of the current. We address a large class of systems, including finite graphene flakes, and obtain analytic solutions for how the gate wave function controls the transistor.

  13. Integrated Results for Dual Low Voltage IC Based High and Low Side Gate Drive

    E-Print Network [OSTI]

    , electronicballast I. INTRODUCTION High and low side gate drivers are required in most switching power converters Zane Colorado Power Electronics Center (CoPEC) Department of Electrical and Computer Engineering, UCB design for high and low side gate drive is presented based on use of two identical low voltage ICs

  14. High performance electrolyte-gated carbon nanotube transistors Sami Rosenblatt1

    E-Print Network [OSTI]

    McEuen, Paul L.

    1 High performance electrolyte-gated carbon nanotube transistors Sami Rosenblatt1 , Yuval Yaish1 , Jiwoong Park1,2 , Jeff Gore2 , Vera Sazonova1 , and Paul L. McEuen1 1 Laboratory of Atomic and Solid State, annealing to improve the contacts, and an electrolyte as a gate, we obtain very high device mobilites

  15. High-Aspect Ratio Deep Sub-Micron -Si Gate Etch Process Control

    E-Print Network [OSTI]

    Grizzle, Jessy W.

    .-M. Park Mask U of M Industry Industry Goal · High throughput · Good morphology · Minimum gate oxide damage1 High-Aspect Ratio Deep Sub-Micron -Si Gate Etch Process Control H.-M. Park, T. L. Brock, D · Blank sample ·Patterned sample · Conclusion H.-M. Park #12;3 Etching Process of Deep Sub

  16. Lifetime of high-k gate dielectrics and analogy with strength of quasibrittle Jia-Liang Le,1

    E-Print Network [OSTI]

    Bazant, Martin Z.

    for breakdown lifetime increases in proportion to the thickness of the oxide layer and suggests new ideas in the gate oxide layer induces the trap-assisted tunneling process, which leads to the gate leakage current

  17. Charge Trapping Characteristics of SONOS Capacitors with Control Gates of Different Work Functions during Program/Erase Operations

    E-Print Network [OSTI]

    Lee, Jong Duk

    (3.2 eV), which gives higher probability of the electron tunneling from control gate to the silicon traps as its program mechanism. When a positive bias stress is applied on the control gate, electrons gate and top oxide tunnel into the silicon nitride layer and recombine with holes which are trapped

  18. Glitch Power Minimization by Gate Freezing L. Benini3 G. De Micheli A. Maciiz E. Maciiz M. Poncinoz R. Scarsiz

    E-Print Network [OSTI]

    De Micheli, Giovanni

    Glitch Power Minimization by Gate Freezing L. Benini3 G. De Micheli A. Maciiz E. Maciiz M freezing idea we present in this paper. Di erently from gate freezing, the techniques above are applied before placement and routing. We have applied the gate freezing procedure to the Iscas'85 benchmarks 2

  19. Photon generator

    DOE Patents [OSTI]

    Srinivasan-Rao, Triveni (Shoreham, NY)

    2002-01-01

    A photon generator includes an electron gun for emitting an electron beam, a laser for emitting a laser beam, and an interaction ring wherein the laser beam repetitively collides with the electron beam for emitting a high energy photon beam therefrom in the exemplary form of x-rays. The interaction ring is a closed loop, sized and configured for circulating the electron beam with a period substantially equal to the period of the laser beam pulses for effecting repetitive collisions.

  20. Cluster generator

    DOE Patents [OSTI]

    Donchev, Todor I. (Urbana, IL); Petrov, Ivan G. (Champaign, IL)

    2011-05-31

    Described herein is an apparatus and a method for producing atom clusters based on a gas discharge within a hollow cathode. The hollow cathode includes one or more walls. The one or more walls define a sputtering chamber within the hollow cathode and include a material to be sputtered. A hollow anode is positioned at an end of the sputtering chamber, and atom clusters are formed when a gas discharge is generated between the hollow anode and the hollow cathode.

  1. Electric generator

    DOE Patents [OSTI]

    Foster, Jr., John S. (Pleasanton, CA); Wilson, James R. (Livermore, CA); McDonald, Jr., Charles A. (Danville, CA)

    1983-01-01

    1. In an electrical energy generator, the combination comprising a first elongated annular electrical current conductor having at least one bare surface extending longitudinally and facing radially inwards therein, a second elongated annular electrical current conductor disposed coaxially within said first conductor and having an outer bare surface area extending longitudinally and facing said bare surface of said first conductor, the contiguous coaxial areas of said first and second conductors defining an inductive element, means for applying an electrical current to at least one of said conductors for generating a magnetic field encompassing said inductive element, and explosive charge means disposed concentrically with respect to said conductors including at least the area of said inductive element, said explosive charge means including means disposed to initiate an explosive wave front in said explosive advancing longitudinally along said inductive element, said wave front being effective to progressively deform at least one of said conductors to bring said bare surfaces thereof into electrically conductive contact to progressively reduce the inductance of the inductive element defined by said conductors and transferring explosive energy to said magnetic field effective to generate an electrical potential between undeformed portions of said conductors ahead of said explosive wave front.

  2. Procedures for realizing an approximate universal NOT gate

    E-Print Network [OSTI]

    Jeongho Bang; Seung-Woo Lee; Hyunseok Jeong; Jinhyoung Lee

    2012-12-19

    We consider procedures to realize an approximate universal NOT gate in terms of average fidelity and fidelity deviation. The average fidelity indicates the optimality of operation on average, while the fidelity deviation does the universality of operation. We show that one-qubit operations have a sharp trade-off relation between average fidelity and fidelity deviation, and two-qubit operations show a looser trade-off relation. The genuine universality holds for operations of more than two qubits, and those of even more qubits are beneficial to compensating imperfection of control. In addition, we take into account operational noises which contaminate quantum operation in realistic circumstances. We show that the operation recovers from the contamination by a feedback procedure of differential evolution. Our feedback scheme is also applicable to finding an optimal and universal operation of NOT.

  3. Gas-controlled dynamic vacuum insulation with gas gate

    DOE Patents [OSTI]

    Benson, David K. (Golden, CO); Potter, Thomas F. (Denver, CO)

    1994-06-07

    Disclosed is a dynamic vacuum insulation comprising sidewalls enclosing an evacuated chamber and gas control means for releasing hydrogen gas into a chamber to increase gas molecule conduction of heat across the chamber and retrieving hydrogen gas from the chamber. The gas control means includes a metal hydride that absorbs and retains hydrogen gas at cooler temperatures and releases hydrogen gas at hotter temperatures; a hydride heating means for selectively heating the metal hydride to temperatures high enough to release hydrogen gas from the metal hydride; and gate means positioned between the metal hydride and the chamber for selectively allowing hydrogen to flow or not to flow between said metal hydride and said chamber.

  4. Gas-controlled dynamic vacuum insulation with gas gate

    DOE Patents [OSTI]

    Benson, D.K.; Potter, T.F.

    1994-06-07

    Disclosed is a dynamic vacuum insulation comprising sidewalls enclosing an evacuated chamber and gas control means for releasing hydrogen gas into a chamber to increase gas molecule conduction of heat across the chamber and retrieving hydrogen gas from the chamber. The gas control means includes a metal hydride that absorbs and retains hydrogen gas at cooler temperatures and releases hydrogen gas at hotter temperatures; a hydride heating means for selectively heating the metal hydride to temperatures high enough to release hydrogen gas from the metal hydride; and gate means positioned between the metal hydride and the chamber for selectively allowing hydrogen to flow or not to flow between said metal hydride and said chamber. 25 figs.

  5. Optimized controlled Z gates for two superconducting qubits coupled through a resonator

    E-Print Network [OSTI]

    D. J. Egger; F. K. Wilhelm

    2013-06-28

    Superconducting qubits are a promising candidate for building a quantum computer. A continued challenge for fast yet accurate gates to minimize the effects of decoherence. Here we apply numerical methods to design fast entangling gates, specifically the controlled Z, in an architecture where two qubits are coupled via a resonator. We find that the gates can be sped up by a factor of two and reach any target fidelity. We also discuss how systematic errors arising from experimental conditions affect the pulses and how to remedy them, providing a strategy for the experimental implementation of our results. We discuss the shape of the pulses, their spectrum and symmetry.

  6. Adiabatic two-photon quantum gate operations using a long-range photonic bus

    E-Print Network [OSTI]

    Anthony P. Hope; Thach G. Nguyen; Arnan Mitchell; Andrew D. Greentree

    2014-12-01

    Adiabatic techniques have much potential to realise practical and robust optical waveguide devices. Traditionally photonic elements are limited to coupling schemes that rely on proximity to nearest neighbour elements. We combine adiabatic passage with a continuum based long-range optical bus to break free from such topological restraints and thereby outline a new approach to photonic quantum gate design. We explicitly show designs for adiabatic quantum gates that produce a Hadamard, 50:50 and 1/3:2/3 beam splitter, and non-deterministic CNOT gate based on planar thin, shallow ridge waveguides. Our calculations are performed under conditions of one and two-photon inputs.

  7. Design of a spin-wave majority gate employing mode selection

    SciTech Connect (OSTI)

    Klingler, S. Pirro, P.; Brächer, T.; Leven, B.; Hillebrands, B.; Chumak, A. V.

    2014-10-13

    The design of a microstructured, fully functional spin-wave majority gate is presented and studied using micromagnetic simulations. This all-magnon logic gate consists of three-input waveguides, a spin-wave combiner, and an output waveguide. In order to ensure the functionality of the device, the output waveguide is designed to perform spin-wave mode selection. We demonstrate that the gate evaluates the majority of the input signals coded into the spin-wave phase. Moreover, the all-magnon data processing device is used to perform logic AND-, OR-, NAND-, and NOR- operations.

  8. Multi-images deconvolution improves signal-to-noise ratio on gated stimulated emission depletion microscopy

    SciTech Connect (OSTI)

    Castello, Marco; Diaspro, Alberto; Vicidomini, Giuseppe

    2014-12-08

    Time-gated detection, namely, only collecting the fluorescence photons after a time-delay from the excitation events, reduces complexity, cost, and illumination intensity of a stimulated emission depletion (STED) microscope. In the gated continuous-wave- (CW-) STED implementation, the spatial resolution improves with increased time-delay, but the signal-to-noise ratio (SNR) reduces. Thus, in sub-optimal conditions, such as a low photon-budget regime, the SNR reduction can cancel-out the expected gain in resolution. Here, we propose a method which does not discard photons, but instead collects all the photons in different time-gates and recombines them through a multi-image deconvolution. Our results, obtained on simulated and experimental data, show that the SNR of the restored image improves relative to the gated image, thereby improving the effective resolution.

  9. Shot noise in an electron waveguide square root of NOT gate

    E-Print Network [OSTI]

    Linda E. Reichl; Michael G. Snyder

    2006-01-17

    We present a calculation of the shot noise in a ballistic electron waveguide square root of NOT gate. A general expression for the shot noise in the leads connected to these types of gates is shown. We then parameterize an S-matrix which qualitatively describes the action of a square root of NOT gate previously found through numerical methods for GaAs/Al_xGa_{1-x}As based waveguides systems. Using this S-matrix, the shot noise in a single output lead and across two output leads is calculated. We find that the measurement of the shot noise across two output leads allows for the determination of the fidelity of the gate itself.

  10. Vehicle Technologies Office Merit Review 2015: GATE: Energy Efficient Vehicles for Sustainable Mobility

    Office of Energy Efficiency and Renewable Energy (EERE)

    Presentation given by The Ohio State University at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about GATE: energy...

  11. Improving Quantum Gate Fidelities by Using a Qubit to Measure Microwave Pulse Distortions

    E-Print Network [OSTI]

    Gustavsson, Simon

    We present a new method for determining pulse imperfections and improving the single-gate fidelity in a superconducting qubit. By applying consecutive positive and negative ? pulses, we amplify the qubit evolution due to ...

  12. Vehicle Technologies Office Merit Review 2015: GATE Center for Electric Drive Transportation

    Broader source: Energy.gov [DOE]

    Presentation given by Regents University of Michigan at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about GATE Center...

  13. Vehicle Technologies Office Merit Review 2015: GATE Center of Excellence in Sustainable Vehicle Systems

    Broader source: Energy.gov [DOE]

    Presentation given by Clemson University at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about GATE center of excellence...

  14. Vehicle Technologies Office Merit Review 2014: DOE GATE Center of Excellence in Sustainable Vehicle Systems

    Broader source: Energy.gov [DOE]

    Presentation given by Clemson University at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about DOE GATE Center of...

  15. Vehicle Technologies Office Merit Review 2014: GATE: Energy Efficient Vehicles for Sustainable Mobility

    Broader source: Energy.gov [DOE]

    Presentation given by Ohio State University at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about GATE: energy efficient...

  16. CNT-based gas ionizers with integrated MEMS gate for portable mass spectrometry applications

    E-Print Network [OSTI]

    Velasquez-Garcia, Luis Fernando

    We report the fabrication and experimental characterization of a novel low-cost carbon nanotube (CNT)-based electron impact ionizer (EII) with integrated gate for portable mass spectrometry applications. The device achieves ...

  17. Energy-aware architectures, circuits and CAD for field programmable gate arrays

    E-Print Network [OSTI]

    Honoré, Francis

    2006-01-01

    Field Programmable Gate Arrays (FPGAs) are a class of hardware reconfigurable logic devices based on look-up tables (LUTs) and programmable interconnect that have found broad acceptance for a wide range of applications. ...

  18. Quantifying the quantum gate fidelity of single-atom spin qubits in silicon by randomized benchmarking

    E-Print Network [OSTI]

    J. T. Muhonen; A. Laucht; S. Simmons; J. P. Dehollain; R. Kalra; F. E. Hudson; S. Freer; K. M. Itoh; D. N. Jamieson; J. C. McCallum; A. S. Dzurak; A. Morello

    2014-10-09

    Building upon the demonstration of coherent control and single-shot readout of the electron and nuclear spins of individual 31-P atoms in silicon, we present here a systematic experimental estimate of quantum gate fidelities using randomized benchmarking of 1-qubit gates in the Clifford group. We apply this analysis to the electron and the ionized 31-P nucleus of a single P donor in isotopically purified 28-Si. We find average gate fidelities of 99.95 % for the electron, and 99.99 % for the nuclear spin. These values are above certain error correction thresholds, and demonstrate the potential of donor-based quantum computing in silicon. By studying the influence of the shape and power of the control pulses, we find evidence that the present limitation to the gate fidelity is mostly related to the external hardware, and not the intrinsic behaviour of the qubit.

  19. Electrolyte-gated graphene field-effect transistors : modeling and applications

    E-Print Network [OSTI]

    Mackin, Charles Edward

    2015-01-01

    This work presents a model for electrolyte-gated graphene field-effect transistors (EGFETs) that incorporates the effects of the double layer capacitance and the quantum capacitance of graphene. The model is validated ...

  20. Multi-qubit quantum phase gates based on surface plasmons of a nanosphere

    E-Print Network [OSTI]

    Jun Ren; Jun Yuan; Xiangdong Zhang

    2015-02-11

    The Dicke subradiance and superradiance resulting from the interaction between surface plasmons of a nanosphere and an ensemble of quantum emitters have been investigated using a Green function approach. Based on such an investigation, we propose a scheme for a deterministic multiqubit quantum phase gate. As an example, twoqubit, threequbit, and fourqubit quantum phase gates have been designed and analyzed in detail. Phenomena due to the losses in the metal are discussed. Potential applications of these phenomena to quantuminformation processing are anticipated.

  1. Multi-qubit quantum phase gates based on surface plasmons of a nanosphere

    E-Print Network [OSTI]

    Ren, Jun; Zhang, Xiangdong

    2015-01-01

    The Dicke subradiance and superradiance resulting from the interaction between surface plasmons of a nanosphere and an ensemble of quantum emitters have been investigated using a Green function approach. Based on such an investigation, we propose a scheme for a deterministic multiqubit quantum phase gate. As an example, twoqubit, threequbit, and fourqubit quantum phase gates have been designed and analyzed in detail. Phenomena due to the losses in the metal are discussed. Potential applications of these phenomena to quantuminformation processing are anticipated.

  2. Surround-gated vertical nanowire quantum dots M. H. M. van Weert,1

    E-Print Network [OSTI]

    arsenide phosphide InAsP quantum dots embedded in vertical surround-gated indium phosphide InP nanowires dots. The InAsP quantum dots, embedded in InP nanowires, are grown in the vapor-liquid-solid mode usingSurround-gated vertical nanowire quantum dots M. H. M. van Weert,1 M. den Heijer,1 M. P. van Kouwen

  3. Rooted-tree network for optimal non-local gate implementation

    E-Print Network [OSTI]

    Nilesh Vyas; Debashis Saha; Prasanta K. Panigrahi

    2015-06-28

    A general quantum network for implementing non-local control-unitary gates, between remote parties at minimal entanglement cost, is shown to be a rooted-tree structure. Starting from a five party scenario, we demonstrate the local implementation of simultaneous control-Hermitian and multiparty control-unitary gates in an arbitrary n-party network. Previously established networks are shown to be special cases of this general construct.

  4. Magic State Distillation and Gate Compilation in Quantum Algorithms for Quantum Chemistry

    E-Print Network [OSTI]

    Colin J. Trout; Kenneth R. Brown

    2015-01-29

    Quantum algorithms for quantum chemistry map the dynamics of electrons in a molecule to the dynamics of a coupled spin system. To reach chemical accuracy for interesting molecules, a large number of quantum gates must be applied which implies the need for quantum error correction and fault-tolerant quantum computation. Arbitrary fault-tolerant operations can be constructed from a small, universal set of fault-tolerant operations by gate compilation. Quantum chemistry algorithms are compiled by decomposing the dynamics of the coupled spin-system using a Trotter formula, synthesizing the decomposed dynamics using Clifford operations and single-qubit rotations, and finally approximating the single-qubit rotations by a sequence of fault-tolerant single-qubit gates. Certain fault-tolerant gates rely on the preparation of specific single-qubit states referred to as magic states. As a result, gate compilation and magic state distillation are critical for solving quantum chemistry problems on a quantum computer. We review recent progress that has improved the efficiency of gate compilation and magic state distillation by orders of magnitude.

  5. Theory of signal and noise in double-gated nanoscale electronic pH sensors

    SciTech Connect (OSTI)

    Go, Jonghyun; Nair, Pradeep R.; Alam, Muhammad A.

    2012-08-01

    The maximum sensitivity of classical nanowire (NW)-based pH sensors is defined by the Nernst limit of 59 mV/pH. For typical noise levels in ultra-small single-gated nanowire sensors, the signal-to-noise ratio is often not sufficient to resolve pH changes necessary for a broad range of applications. Recently, a new class of double-gated devices was demonstrated to offer apparent 'super-Nernstian' response (>59 mV/pH) by amplifying the original pH signal through innovative biasing schemes. However, the pH-sensitivity of these nanoscale devices as a function of biasing configurations, number of electrodes, and signal-to-noise ratio (SNR) remains poorly understood. Even the basic question such as 'Do double-gated sensors actually resolve smaller changes in pH compared to conventional single-gated sensors in the presence of various sources of noise?' remains unanswered. In this article, we provide a comprehensive numerical and analytical theory of signal and noise of double-gated pH sensors to conclude that, while the theoretical lower limit of pH-resolution does not improve for double-gated sensors, this new class of sensors does improve the (instrument-limited) pH resolution.

  6. SU-E-T-361: Clinical Benefit of Automatic Beam Gating Mixed with Breath Hold in Radiation Therapy of Left Breast

    SciTech Connect (OSTI)

    Wu, J; Hill, G; Spiegel, J; Ye, J; Mehta, V

    2014-06-01

    Purpose: To investigate the clinical and dosimetric benefits of automatic gating of left breast mixed with breath-hold technique. Methods: Two Active Breathing Control systems, ABC2.0 and ABC3.0, were used during simulation and treatment delivery. The two systems are different such that ABC2.0 is a breath-hold system without beam control capability, while ABC3.0 has capability in both breath-hold and beam gating. At simulation, each patient was scanned twice: one with free breathing (FB) and one with breath hold through ABC. Treatment plan was generated on the CT with ABC. The same plan was also recalculated on the CT with FB. These two plans were compared to assess plan quality. For treatments with ABC2.0, beams with MU > 55 were manually split into multiple subfields. All subfields were identical and shared the total MU. For treatment with ABC3.0, beam splitting was unnecessary. Instead, treatment was delivered in gating mode mixed with breath-hold technique. Treatment delivery efficiency using the two systems was compared. Results: The prescribed dose was 50.4Gy at 1.8Gy/fraction. The maximum heart dose averaged over 10 patients was 46.0±2.5Gy and 24.5±12.2Gy for treatments with FB and with ABC respectively. The corresponding heart V10 was 13.2±3.6% and 1.0±1.6% respectively. The averaged MUs were 99.8±7.5 for LMT, 99.2±9.4 for LLT. For treatment with ABC2.0, normally the original beam was split into 2 subfields. The averaged total time to delivery all beams was 4.3±0.4min for treatments with ABC2.0 and 3.3±0.6min for treatments with ABC3.0 in gating mode. Conclusion: Treatment with ABC tremendously reduced heart dose. Compared to treatments with ABC2.0, gating with ABC3.0 reduced the total treatment time by 23%. Use of ABC3.0 improved the delivery efficiency, and eliminated the possibility of mistreatments. The latter may happen with ABC2.0 where beam is not terminated when breath signal falls outside of the treatment window.

  7. Generators, Recursion, and Fractals 1 Generators

    E-Print Network [OSTI]

    Verschelde, Jan

    Generators, Recursion, and Fractals 1 Generators computing a list of Fibonacci numbers defining a generator with yield putting yield in the function fib 2 Recursive Functions computing factorials, 24 April 2015 Intro to Computer Science (MCS 260) generators and recursion L-41 24 April 2015 1 / 36

  8. Charge noise analysis of metal oxide semiconductor dual-gate Si/SiGe quantum point contacts

    SciTech Connect (OSTI)

    Kamioka, J.; Oda, S.; Kodera, T.; Takeda, K.; Obata, T.; Tarucha, S.

    2014-05-28

    The frequency dependence of conductance noise through a gate-defined quantum point contact fabricated on a Si/SiGe modulation doped wafer is characterized. The 1/f{sup 2} noise, which is characteristic of random telegraph noise, is reduced by application of a negative bias on the global top gate to reduce the local gate voltage. Direct leakage from the large global gate voltage also causes random telegraph noise, and therefore, there is a suitable point to operate quantum dot measurement.

  9. Time-gated single photon counting enables separation of CARS microscopy data from multiphoton-excited tissue autofluorescence

    E-Print Network [OSTI]

    Ly, Sonny; McNerney, Gregory; Chan, James; Fore, Samantha; Huser, Thomas

    2007-01-01

    Raman scattering microscopy (CARS): Instrumentation andanti-Stokes Raman scattering (CARS) imaging," Opt. Lett. 31,and separated from the CARS signal by employing time-gating

  10. Si and SiGe based double top gated accumulation mode single electron transistors for quantum bits.

    SciTech Connect (OSTI)

    Wendt, Joel Robert; Ten Eyck, Gregory A.; Childs, Kenton David; Celler, G. (SOITEC); Eng, Kevin; Eriksson, Mark A. (University of Wisconsin); Kluskiewicz, Dan (University of New Mexico); Stevens, Jeffrey; Carroll, Malcolm S.; Nordberg, Eric; Lilly, Michael Patrick; Lemp, Thomas; Sheng, Josephine Juin-Jye

    2008-10-01

    There is significant interest in forming quantum bits (qubits) out of single electron devices for quantum information processing (QIP). Information can be encoded using properties like charge or spin. Spin is appealing because it is less strongly coupled to the solid-state environment so it is believed that the quantum state can better be preserved over longer times (i.e., that is longer decoherence times may be achieved). Long spin decoherence times would allow more complex qubit operations to be completed with higher accuracy. Recently spin qubits were demonstrated by several groups using electrostatically gated modulation doped GaAs double quantum dots (DQD) [1], which represented a significant breakthrough in the solid-state field. Although no Si spin qubit has been demonstrated to date, work on Si and SiGe based spin qubits is motivated by the observation that spin decoherence times can be significantly longer than in GaAs. Spin decoherence times in GaAs are in part limited by the random spectral diffusion of the non-zero nuclear spins of the Ga and As that couple to the electron spin through the hyperfine interaction. This effect can be greatly suppressed by using a semiconductor matrix with a near zero nuclear spin background. Near zero nuclear spin backgrounds can be engineered using Si by growing {sup 28}Si enriched epitaxy. In this talk, we will present fabrication details and electrical transport results of an accumulation mode double top gated Si metal insulator semiconductor (MIS) nanostructure, Fig 1 (a) & (b). We will describe how this single electron device structure represent a path towards forming a Si based spin qubit similar in design as that demonstrated in GaAs. Potential advantages of this novel qubit structure relative to previous approaches include the combination of: no doping (i.e., not modulation doped); variable two-dimensional electron gas (2DEG) density; CMOS compatible processes; and relatively small vertical length scales to achieve smaller dots. A primary concern in this structure is defects at the insulator-silicon interface. The Sandia National Laboratories 0.35 {micro}m fab line was used for critical processing steps including formation of the gate oxide to examine the utility of a standard CMOS quality oxide silicon interface for the purpose of fabricating Si qubits. Large area metal oxide silicon (MOS) structures showed a peak mobility of 15,000 cm{sup 2}/V-s at electron densities of {approx}1 x 10{sup 12} cm{sup -2} for an oxide thickness of 10 nm. Defect density measured using standard C-V techniques was found to be greater with decreasing oxide thickness suggesting a device design trade-off between oxide thickness and quantum dot size. The quantum dot structure is completed using electron beam lithography and poly-silicon etch to form the depletion gates, Fig 1 (a). The accumulation gate is added by introducing a second insulating Al{sub 2}O{sub 3} layer, deposited by atomic layer deposition, followed by an Al top gate deposition, Fig. 1 (b). Initial single electron transistor devices using SiO{sub 2} show significant disorder in structures with relatively large critical dimensions of the order of 200-300 nm, Fig 2. This is not uncommon for large silicon structures and has been cited in the literature [2]. Although smaller structures will likely minimize the effect of disorder and well controlled small Si SETs have been demonstrated [3], the design constraints presented by disorder combined with long term concerns about effects of defects on spin decoherence time (e.g., paramagnetic centers) motivates pursuit of a 2nd generation structure that uses a compound semiconductor approach, an epitaxial SiGe barrier as shown in Fig. 2 (c). SiGe may be used as an electron barrier when combined with tensilely strained Si. The introduction of strained-Si into the double top gated device structure, however, represents additional fabrication challenges. Thermal budget is potentially constrained due to concerns related to strain relaxation. Fabrication details related to the introduction of st

  11. Understanding and Managing Generation Y

    E-Print Network [OSTI]

    Wallace, Kevin

    2007-12-14

    There are four generations in the workplace today; they consist of the Silent Generation, Baby Boom Generation, Generation X, and Generation Y. Generation Y, being the newest generation, is the least understood generation although marketers...

  12. Water gate array for current flow or tidal movement pneumatic harnessing system

    DOE Patents [OSTI]

    Gorlov, Alexander M. (Brookline, MA)

    1991-01-01

    The invention, which provides a system for harnessing power from current flow or tidal movement in a body of water, comprises first and second hydro-pneumatic chambers each having ingress and egress below the water surface near the river or ocean floor and water gates operative to open or seal the ports to the passage of water. In an exemplary embodiment, the gates are sychronized by shafts so that the ingress ports of each chamber are connected to the egress ports of each other chamber. Thus, one set of gates is closed, while the other is open, thereby allowing water to flow into one chamber and build air pressure therein and allowing water to flow out of the other chamber and create a partial vacuum therein. A pipe connects the chambers, and an air turbine harnesses the air movement within the pipe. When water levels are equilibrated, the open set of gates is closed by a counterweight, and the other set is allowed to open by natural force of the water differential. The water gates may be comprised of a plurality of louvers which are ganged for simultaneous opening and closing. The system is designed to operate with air turbines or other pneumatic devices. Its design minimizes construction cost and environmental impact, yet provides a clean renewable energy source.

  13. Intrinsic phonon decoherence and quantum gates in coupled lateral quantum dot charge qubits

    E-Print Network [OSTI]

    Markus J. Storcz; Udo Hartmann; Sigmund Kohler; Frank K. Wilhelm

    2005-07-28

    Recent experiments by Hayashi et al. [Phys. Rev. Lett. 91, 226804 (2003)] demonstrate coherent oscillations of a charge quantum bit (qubit) in laterally defined quantum dots. We study the intrinsic electron-phonon decoherence and gate performance for the next step: a system of two coupled charge qubits. The effective decoherence model contains properties of local as well as collective decoherence. Decoherence channels can be classified by their multipole moments, which leads to different low-energy spectra. It is shown that due to the super-Ohmic spectrum, the gate quality is limited by the single-qubit Hadamard gates. It can be significantly improved, by using double-dots with weak tunnel coupling.

  14. Optical imaging through turbid media with a degenerate four-wave mixing correlation time gate

    DOE Patents [OSTI]

    Sappey, Andrew D. (Golden, CO)

    1998-04-14

    Optical imaging through turbid media is demonstrated using a degenerate four-wave mixing correlation time gate. An apparatus and method for detecting ballistic and/or snake light while rejecting unwanted diffusive light for imaging structures within highly scattering media are described. Degenerate four-wave mixing (DFWM) of a doubled YAG laser in rhodamine 590 is used to provide an ultrafast correlation time gate to discriminate against light that has undergone multiple scattering and therefore has lost memory of the structures within the scattering medium. Images have been obtained of a test cross-hair pattern through highly turbid suspensions of whole milk in water that are opaque to the naked eye, which demonstrates the utility of DFWM for imaging through turbid media. Use of DFWM as an ultrafast time gate for the detection of ballistic and/or snake light in optical mammography is discussed.

  15. Spintronic single qubit gate based on a quantum ring with spin-orbit interaction

    E-Print Network [OSTI]

    Peter Foldi; Balazs Molnar; Mihaly G. Benedict; F. M. Peeters

    2004-06-14

    In a quantum ring connected with two external leads the spin properties of an incoming electron are modified by the spin-orbit interaction resulting in a transformation of the qubit state carried by the spin. The ring acts as a one qubit spintronic quantum gate whose properties can be varied by tuning the Rashba parameter of the spin-orbit interaction, by changing the relative position of the junctions, as well as by the size of the ring. We show that a large class of unitary transformations can be attained with already one ring -- or a few rings in series -- including the important cases of the Z, X, and Hadamard gates. By choosing appropriate parameters the spin transformations can be made unitary, which corresponds to lossless gates.

  16. Coherent motion of stereocilia assures the concerted gating of hair-cell transduction channels

    E-Print Network [OSTI]

    Andrei S. Kozlov; Thomas Risler; A. J. Hudspeth

    2009-02-16

    The hair cell's mechanoreceptive organelle, the hair bundle, is highly sensitive because its transduction channels open over a very narrow range of displacements. The synchronous gating of transduction channels also underlies the active hair-bundle motility that amplifies and tunes responsiveness. The extent to which the gating of independent transduction channels is coordinated depends on how tightly individual stereocilia are constrained to move as a unit. Using dual-beam interferometry in the bullfrog's sacculus, we found that thermal movements of stereocilia located as far apart as a bundle's opposite edges display high coherence and negligible phase lag. Because the mechanical degrees of freedom of stereocilia are strongly constrained, a force applied anywhere in the hair bundle deflects the structure as a unit. This feature assures the concerted gating of transduction channels that maximizes the sensitivity of mechanoelectrical transduction and enhances the hair bundle's capacity to amplify its inputs.

  17. High fidelity ac gate operations of the quantum dot hybrid qubit

    E-Print Network [OSTI]

    Clement H. Wong

    2015-10-20

    Semiconductor quantum dots in silicon are promising qubits because of long spin coherence times and their potential for scalability. However, such qubits with complete electrical control and fidelities above the threshold for quantum error correction have not yet been achieved. We show theoretically that the threshold fidelity can be achieved with ac gate operation of the quantum dot hybrid qubit. Formed by three electrons in a double dot, this qubit is electrically controlled, does not require magnetic fields, and runs at GHz gate speeds. We analyze the decoherence caused by 1/f charge noise in this qubit, find parameters that minimize the charge noise dependence in the qubit frequency, and determine the optimal working points for ac gate operations that drive the detuning and tunnel coupling.

  18. 60 nm gate length Al2O3 / In0.53Ga0.47As gate-first MOSFETs using InAs raised source-drain regrowth

    E-Print Network [OSTI]

    Rodwell, Mark J. W.

    plasma / trimethylaluminum (TMA) cycles. A 60 nm sputtered W/15 nm electron beam evaporated Cr/400 nm PECVD SiO2/15 nm electron beam evaporated Cr gate stack was blanket- deposited. Gate lengths between 60 and optical lithography. A high power inductively coupled (ICP) plasma SF6/Ar etch defined vertical pillars

  19. Liquid-based gating mechanism with tunable multiphase selectivity and antifouling behaviour

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

    Hou, Xu; Hu, Yuhang; Grinthal, Alison; Khan, Mughees; Aizenberg, Joanna

    2015-03-04

    Living organisms make extensive use of micro- and nanometre-sized pores as gatekeepers for controlling the movement of fluids, vapours and solids between complex environments. In addition, the ability of such pores to coordinate multiphase transport, in a highly selective and subtly triggered fashion and without clogging, has inspired interest in synthetic gated pores for applications ranging from fluid processing to 3D printing and lab-on-chip systems1-10.But although specific gating and transport behaviours have been realized by precisely tailoring pore surface chemistries and pore geometries6,11–17, a single system capable of controlling complex, selective multiphase transport has remained a distant prospect, and foulingmore »is nearly inevitable.Here we introduce a gating mechanism that uses a capillary-stabilized liquid as a reversible, reconfigurable gate that fills and seals pores in the closed state, and creates a non-fouling, liquid-lined pore in the open state.Theoretical modelling and experiments demonstrate that for each transport substance, the gating threshold—the pressure needed to open the pores—can be rationally tuned over a wide pressure range. This enables us to realize in one system differential response profiles for a variety of liquids and gases, even letting liquids flow through the pore while preventing gas from escaping.These capabilities allow us to dynamically modulate gas–liquid sorting in a microfluidic flow and to separate a three-phase air water–oil mixture, with the liquid lining ensuring sustained antifouling behaviour. Because the liquid gating strategy enables efficient long-term operation and can be applied to a variety of pore structures and membrane materials, and to micro- as well as macroscale fluid systems, we expect it to prove useful in a wide range of applications.« less

  20. Liquid-based gating mechanism with tunable multiphase selectivity and antifouling behaviour

    SciTech Connect (OSTI)

    Hou, Xu; Hu, Yuhang; Grinthal, Alison; Khan, Mughees; Aizenberg, Joanna

    2015-03-04

    Living organisms make extensive use of micro- and nanometre-sized pores as gatekeepers for controlling the movement of fluids, vapours and solids between complex environments. In addition, the ability of such pores to coordinate multiphase transport, in a highly selective and subtly triggered fashion and without clogging, has inspired interest in synthetic gated pores for applications ranging from fluid processing to 3D printing and lab-on-chip systems1-10.But although specific gating and transport behaviours have been realized by precisely tailoring pore surface chemistries and pore geometries6,11–17, a single system capable of controlling complex, selective multiphase transport has remained a distant prospect, and fouling is nearly inevitable.Here we introduce a gating mechanism that uses a capillary-stabilized liquid as a reversible, reconfigurable gate that fills and seals pores in the closed state, and creates a non-fouling, liquid-lined pore in the open state.Theoretical modelling and experiments demonstrate that for each transport substance, the gating threshold—the pressure needed to open the pores—can be rationally tuned over a wide pressure range. This enables us to realize in one system differential response profiles for a variety of liquids and gases, even letting liquids flow through the pore while preventing gas from escaping.These capabilities allow us to dynamically modulate gas–liquid sorting in a microfluidic flow and to separate a three-phase air water–oil mixture, with the liquid lining ensuring sustained antifouling behaviour. Because the liquid gating strategy enables efficient long-term operation and can be applied to a variety of pore structures and membrane materials, and to micro- as well as macroscale fluid systems, we expect it to prove useful in a wide range of applications.

  1. -1-Jour. HTSJ, Vol. 42, No. 177 Generation and Characterization of Single-Walled Carbon Nanotubes

    E-Print Network [OSTI]

    Maruyama, Shigeo

    (2) -1- Jour. HTSJ, Vol. 42, No. 177 Generation and Characterization of Single-Walled Carbon (SUS316) NMR 5.8Tesla 2 (300l/s) (50l/s) 3 ×10-10 Torr 1×10-7 Torr 8 5V 10V 2] M. Kohno et al., Micro. Thermophys. Eng., 7 (2003) 33. Turbopump Gate Valve Cluster Source 6 Tesla

  2. Charging dynamics of a floating gate transistor with site-controlled quantum dots

    SciTech Connect (OSTI)

    Maier, P. Hartmann, F.; Emmerling, M.; Schneider, C.; Höfling, S.; Kamp, M.; Worschech, L.

    2014-08-04

    A quantum dot memory based on a GaAs/AlGaAs quantum wire with site-controlled InAs quantum dots was realized by means of molecular beam epitaxy and etching techniques. By sampling of different gate voltage sweeps for the determination of charging and discharging thresholds, it was found that discharging takes place at short time scales of ?s, whereas several seconds of waiting times within a distinct negative gate voltage range were needed to charge the quantum dots. Such quantum dot structures have thus the potential to implement logic functions comprising charge and time dependent ingredients such as counting of signals or learning rules.

  3. Atomistic characterization of SAM coatings as gate insulators in Si-based FET devices

    SciTech Connect (OSTI)

    Gala, F. [Universitá di Roma La Sapienza, Via Scarpa 14-16, 00161 Rome (Italy); Zollo, G. [Universitá di Roma La Sapienza', Via Scarpa 14-16, 00161 Rome (Italy)

    2014-06-19

    Many nano-material systems are currently under consideration as possible candidates for gate dielectric insulators in both metal-oxide-semiconductor (MOSFET) and organic (OFET) field-effect transistors. In this contribution, the possibility of employing self-assembled monolayers (SAMs) of hydroxylated octadecyltrichlorosilane (OTS) chains on a (111) Si substrate as gate dielectrics is discussed; in particular ab initio theoretical simulations have been employed to study the structural properties, work function modifications, and the insulating properties of OTS thin film coatings on Si substrates.

  4. Gate-Defined Wires in HgTe Quantum Wells: From Majorana Fermions to Spintronics Johannes Reuther and Jason Alicea

    E-Print Network [OSTI]

    Yacoby, Amir

    Gate-Defined Wires in HgTe Quantum Wells: From Majorana Fermions to Spintronics Johannes Reuther and various spintronics applications based on gate-defined wires in HgTe quantum wells. Because of the Dirac­15] architectures, while not usually viewed from a spintronics lens, similarly rely crucially on spin manipulation

  5. Abstract--Bias temperature instability, hot-carrier injection, and gate-oxide wearout will cause severe lifetime degradation in

    E-Print Network [OSTI]

    Lipasti, Mikko H.

    affect device performance and lead to timing violations; as well as gate-oxide wearout [3] which can probability of oxide breakdown, leading to a hard failure of a device that exceeds its intended (or targetedAbstract--Bias temperature instability, hot-carrier injection, and gate-oxide wearout will cause

  6. Ambipolar graphene field effect transistors by local metal side gates J. F. Tian,1,2,a

    E-Print Network [OSTI]

    Chen, Yong P.

    the Dirac point where the valence and conduction bands meet, making graphene a zero-gap semiconductor. BothAmbipolar graphene field effect transistors by local metal side gates J. F. Tian,1,2,a L. A ambipolar graphene field effect transistors individually controlled by local metal side gates. The side

  7. Electrical Modulation of Ion Concentration in Dual-Gated Nanochannels Yang Liu, Qiushi Ran, and Robert W. Dutton

    E-Print Network [OSTI]

    Liu, Yang

    Electrical Modulation of Ion Concentration in Dual-Gated Nanochannels Yang Liu, Qiushi Ran simulations demonstrate the operating principles of using electrical biases in dual-gated nano potential applications range from fuel cells [11] to desalination [12]. Nevertheless, in contrast

  8. High temperature stability in lanthanum and zirconia-based gate dielectrics J.-P. Maria,a)

    E-Print Network [OSTI]

    Garfunkel, Eric

    High temperature stability in lanthanum and zirconia-based gate dielectrics J.-P. Maria,a) D for publication 19 June 2001 Gate dielectrics composed primarily of lanthana and zirconia were prepared. By controlling the oxygen partial pressure during heat treatment, lanthana and zirconia films could be protected

  9. The role of oxygen in hydrogen sensing by a platinum-gate silicon carbide gas sensor: An ultrahigh vacuum study

    E-Print Network [OSTI]

    Tobin, Roger G.

    active transition metals such as platinum and palladium, show great promise as sen- sors for hydrogenThe role of oxygen in hydrogen sensing by a platinum-gate silicon carbide gas sensor: An ultrahigh with nonporous platinum gates. The devices studied are shown to be sensitive both to hydrogen and to propene. All

  10. The role of oxygen in hydrogen sensing by a platinum-gate silicon carbide gas sensor: An ultrahigh vacuum study

    E-Print Network [OSTI]

    Ghosh, Ruby N.

    active transition metals such as platinum and palladium, show great promise as sen- sors for hydrogenThe role of oxygen in hydrogen sensing by a platinum-gate silicon carbide gas sensor: An ultrahigh of oxygen in hydrogen sensing by a platinum-gate silicon carbide gas sensor: An ultrahigh vacuum study Yung

  11. Possible realization of entanglement, logical gates, and quantum-information transfer with superconducting-quantum-interference-device qubits in cavity QED

    E-Print Network [OSTI]

    Yang, Chui-Ping; Chu, Shih-I; Han, Siyuan

    2003-04-17

    We present a scheme to achieve maximally entangled states, controlled phase-shift gate, and SWAP gate for two superconducting-quantum-interference-device (SQUID) qubits, by placing SQUIDs in a microwave cavity. We also show how to transfer quantum...

  12. An energy relaxation tolerant approach to quantum entanglement, information transfer, and gates with superconducting-quantum-interference-device qubits in cavity QED

    E-Print Network [OSTI]

    Yang, Chui-Ping; Chu, Shih-I; Han, Siyuan

    2004-03-31

    A scheme is proposed for realizing quantum entanglement, information transfer, CNOT gates, and SWAP gates with supercoiiducting-quantum-interference-device (SQUID) qubits in cavity QED. In the scheme, the two logical states of a qubit are the two...

  13. Top-gate zinc tin oxide thin-film transistors with high bias and environmental stress stability

    SciTech Connect (OSTI)

    Fakhri, M.; Theisen, M.; Behrendt, A.; Görrn, P.; Riedl, T. [Institute of Electronic Devices, University of Wuppertal, Wuppertal 42119 (Germany)

    2014-06-23

    Top gated metal-oxide thin-film transistors (TFTs) provide two benefits compared to their conventional bottom-gate counterparts: (i) The gate dielectric may concomitantly serve as encapsulation layer for the TFT channel. (ii) Damage of the dielectric due to high-energetic particles during channel deposition can be avoided. In our work, the top-gate dielectric is prepared by ozone based atomic layer deposition at low temperatures. For ultra-low gas permeation rates, we introduce nano-laminates of Al{sub 2}O{sub 3}/ZrO{sub 2} as dielectrics. The resulting TFTs show a superior environmental stability even at elevated temperatures. Their outstanding stability vs. bias stress is benchmarked against bottom-gate devices with encapsulation.

  14. Generation gaps in engineering?

    E-Print Network [OSTI]

    Kim, David J. (David Jinwoo)

    2008-01-01

    There is much enthusiastic debate on the topic of generation gaps in the workplace today; what the generational differences are, how to address the apparent challenges, and if the generations themselves are even real. ...

  15. Small Generator Aggregation (Maine)

    Broader source: Energy.gov [DOE]

    This section establishes requirements for electricity providers to purchase electricity from small generators, with the goal of ensuring that small electricity generators (those with a nameplate...

  16. Quantum Insights in Gate Oxide Charge-Trapping Dynamics in Nanoscale MOSFETs

    E-Print Network [OSTI]

    Dimov, Ivan

    , in this paper we investigate the trapping of a single electron in the gate oxide of a 25nm transistor including and scattering phenomena. Keywords--Reliability; Tunneling; Scattering; NBTI; RTN; Wigner Function; charge-trapping. The evolution of an initial electron packet subject to the action of device channel potential and the oxide trap

  17. Temperature-Gated Thermal Rectifier for Active Heat Flow Control Kedar Hippalgaonkar,,

    E-Print Network [OSTI]

    Wu, Junqiao

    Temperature-Gated Thermal Rectifier for Active Heat Flow Control Jia Zhu,, Kedar Hippalgaonkar to develop advanced all-thermal solid-state devices that actively control heat flow without consuming other of solid-state active-thermal devices with a large rectification in the Rectifier state. This temperature

  18. Method and system for measuring gate valve clearances and seating force

    DOE Patents [OSTI]

    Casada, Donald A. (Knoxville, TN); Haynes, Howard D. (Knoxville, TN); Moyers, John C. (Oak Ridge, TN); Stewart, Brian K. (Burns, TN)

    1996-01-01

    Valve clearances and seating force, as well as other valve operational parameters, are determined by measuring valve stem rotation during opening and closing operations of a translatable gate valve. The magnitude of the stem rotation, and the relative difference between the stem rotation on opening and closing provides valuable data on the valve internals in a non-intrusive manner.

  19. Low-frequency electronic noise in the double-gate single-layer graphene transistors

    E-Print Network [OSTI]

    Low-frequency electronic noise in the double-gate single-layer graphene transistors G. Liu,1 W The authors report the results of an experimental investigation of the low-frequency noise in the double by 20 nm of HfO2 from the single-layer graphene channels. The measurements revealed low flicker noise

  20. Respiratory gating of anatomical optical coherence tomography images of the human

    E-Print Network [OSTI]

    Daume III, Hal

    , N. Zamel, and V. Hoffstein, "Pharyngeal cross-sectional area in normal men and women," J. Appl. Physiol. 61, 890-895 (1986). 8. P. P. Hsu, H. N. C. Han, Y. H. Chan, H. N. Tay, R. H. Brett, P. K. S. Lu demonstration of respiratory gating of aOCT airway data, and introduces a novel error measure to guide

  1. Implementation of Power Transmission Lines to Field Programmable Gate Array ICs for Managing Signal

    E-Print Network [OSTI]

    Swaminathan, Madhavan

    Implementation of Power Transmission Lines to Field Programmable Gate Array ICs for Managing Signal employs power transmission lines (PTL) that supply power to integrated circuits instead of using is able to reduce SSN and enhance power and signal integrity. Pseudo-balanced power transmission line (PB

  2. NASA VLSI 2007 Mohanty & Kougianos 1 Impact of Gate Leakage on Mixed Signal

    E-Print Network [OSTI]

    Mohanty, Saraju P.

    NASA VLSI 2007 Mohanty & Kougianos 1 Impact of Gate Leakage on Mixed Signal Design and Simulation dhruva@unt.edu #12;NASA VLSI 2007 Mohanty & Kougianos 2 Outline of the Talk Introduction Related works Remedy Conclusions #12;NASA VLSI 2007 Mohanty & Kougianos 3 Introduction Characterization of mixed signal

  3. Na K -pump ligands modulate gating of palytoxin-induced ion channels

    E-Print Network [OSTI]

    Gadsby, David

    Na K -pump ligands modulate gating of palytoxin-induced ion channels Pablo Artigas and David C (received for review September 26, 2002) The Na K pump is a ubiquitous P-type ATPase that binds three -ion occlusion to phosphorylation of the pump by ATP and of K -ion occlusion to its dephosphorylation

  4. Influence of Electrolyte Composition on Liquid-Gated Carbon Nanotube and Graphene Transistors

    E-Print Network [OSTI]

    Dekker, Cees

    Influence of Electrolyte Composition on Liquid-Gated Carbon Nanotube and Graphene Transistors Iddo-walled carbon nanotubes (SWNTs) and graphene can function as highly sensitive nanoscale (bio)sensors in solution. Here, we compare experimentally how SWNT and graphene transistors respond to changes in the composition

  5. Increasing efficiency of a linear-optical quantum gate using an electronic feed forward

    E-Print Network [OSTI]

    Mikova, Martina; Straka, Ivo; Micuda, Michal; Jezek, Miroslav; Dusek, Miloslav

    2011-01-01

    We have successfully used a fast electronic feed forward to increase the success probability of a linear optical implementation of a programmable phase gate from 25% to its theoretical limit of 50%. The feed forward applies a conditional unitary operation which changes the incorrect output states of the data qubit to the correct ones. The gate itself rotates an arbitrary quantum state of the data qubit around the z-axis of the Bloch sphere with the angle of rotation being fully determined by the state of the program qubit. The gate implementation is based on fiber optics components. Qubits are encoded into spatial modes of single photons. The signal from the feed-forward detector is led directly to a phase modulator using only a passive voltage divider. We have verified the increase of the success probability and characterized the gate operation by means of quantum process tomography. We have demonstrated that the use of the feed forward does not affect either the process fidelity or the output-state fideliti...

  6. Increasing efficiency of a linear-optical quantum gate using an electronic feed forward

    E-Print Network [OSTI]

    Martina Mikova; Helena Fikerova; Ivo Straka; Michal Micuda; Miroslav Jezek; Miloslav Dusek

    2011-11-14

    We have successfully used a fast electronic feed forward to increase the success probability of a linear optical implementation of a programmable phase gate from 25% to its theoretical limit of 50%. The feed forward applies a conditional unitary operation which changes the incorrect output states of the data qubit to the correct ones. The gate itself rotates an arbitrary quantum state of the data qubit around the z-axis of the Bloch sphere with the angle of rotation being fully determined by the state of the program qubit. The gate implementation is based on fiber optics components. Qubits are encoded into spatial modes of single photons. The signal from the feed-forward detector is led directly to a phase modulator using only a passive voltage divider. We have verified the increase of the success probability and characterized the gate operation by means of quantum process tomography. We have demonstrated that the use of the feed forward does not affect either the process fidelity or the output-state fidelities.

  7. Piezoelectric Potential Gated Field-Effect Transistor Based on a Free-Standing

    E-Print Network [OSTI]

    Huang, Yanyi

    -standing piezoelectric FET has potential applications like hearing aids, atomic force microscopy (AFM) cantileversPiezoelectric Potential Gated Field-Effect Transistor Based on a Free-Standing ZnO Wire Peng Fei report an external force triggered field-effect transistor based on a free-standing piezoelectric fine

  8. Fast gating in the Shaker K channel and the energy landscape of activation

    E-Print Network [OSTI]

    Bezanilla, Francisco

    Fast gating in the Shaker K channel and the energy landscape of activation Daniel Sigg , Francisco sec has been recorded with a high-speed patch­clamp setup. This fast component was found to be part-landscape inter- pretation of protein kinetics, the voltage and temperature depen- dence of the fast component may

  9. QualityGate SourceAudit: A Tool for Assessing the Technical Quality of Software

    E-Print Network [OSTI]

    Ferenc, Rudolf

    QualityGate SourceAudit: A Tool for Assessing the Technical Quality of Software Tibor Bakota Front the internal quality of the system over time. This phenomena is called software erosion, which results assessment of software quality. By monitoring the high-level technical quality of systems it is possible

  10. ERK2: a logical AND gate critical for drug-induced plasticity? Truncated title

    E-Print Network [OSTI]

    1 Title: ERK2: a logical AND gate critical for drug-induced plasticity? Truncated title: ERK2 signal-regulated kinase (ERK) plays an important role in the underlying molecular mechanisms. ERK. Blockade of ERK activation prevents long- lasting behavioral changes, including psychomotor sensitization

  11. A scalable quantum gate design for quantum computation I. A. Fedorov,1

    E-Print Network [OSTI]

    Ferguson, Thomas S.

    a scalable design for a quantum gate based on an electrostatically defined InP/InGaAs quantum dot system the artificial structures consisting of an array of quantum dots (QDs) at the required dimensions. With each QDP/InGaAs vertical quantum dot (QD) structure and investigate it in the few-electron regime for possible quan- tum

  12. Structural and electrical characterization of CoTiN metal gates

    SciTech Connect (OSTI)

    Wongpiya, Ranida; Ouyang, Jiaomin; Chung, Chia-Jung; Duong, Duc T.; Clemens, Bruce; Deal, Michael; Nishi, Yoshio

    2015-02-21

    As the gate size continues to decrease in nanoscale transistors, having metal gates with amorphous or near amorphous structures can potentially reduce grain-induced work function variation. Furthermore, amorphous materials are known to have superior diffusion barrier properties, which can help prevent work function change due to the diffusion of metals in contact with the gate. In this work we show that with the addition of cobalt, thin films of polycrystalline TiN become more amorphous with a smaller grain size. Co{sub x}(TiN){sub 1-x} films, where x?=?60–80%, appear to consist of nanocrystals embedded in an amorphous matrix, and are thermally stable with no significant crystallization up to an annealing temperature of at least 600?°C. Reducing the nitrogen gas flow ratio during sputter deposition from 9% to 2.5% further decreases the films' crystallinity, which is apparent by more sparse and even smaller nanocrystals. In addition to being partially amorphous, these CoTiN films also exhibit good thermal stability, low resistivity, low roughness, and have the potential for atomic layer deposition compatibility. Even though these materials are not completely amorphous, their small crystal size and amorphous matrix can potentially reduce work function variation and improve their diffusion barrier property. These properties make CoTiN a good candidate as a gate material for future nanoelectronic devices and technology.

  13. Finding the Energy Efficient Curve: Gate Sizing for Minimum Power under Delay Constraints

    E-Print Network [OSTI]

    Kolodny, Avinoam

    Finding the Energy Efficient Curve: Gate Sizing for Minimum Power under Delay Constraints Yoni in a fast circuit by the same factor does not yield an energy-efficient design, and we characterize efficient. A design implementation is considered to be energy efficient when it has the highest performance

  14. Graphene arch gate SiO2 shell silicon nanowire core field effect transistors

    E-Print Network [OSTI]

    Hwang, Sung Woo

    graphene into more complementary metal oxide semiconductor (CMOS)-friendly architectures. FurthermoreGraphene arch gate SiO2 shell silicon nanowire core field effect transistors J. E. Jin, J. H. Lee) metal-semiconductor field-effect transistors on single-crystal -Ga2O3 (010) substrates Appl. Phys. Lett

  15. Title: Hydraulic modeling of a mixed water level control hydro-mechanical gate

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Title: Hydraulic modeling of a mixed water level control hydro-mechanical gate Ludovic Cassan1 Abstract: The article describes the hydraulic functioning of a mixed water level control hydro- mechanical of the model to reproduce the functioning of this complex hydro-mechanical system. CE database Subject headings

  16. An AggreGATE Network Abstraction for Mobile Devices Ganesh Ananthanarayanan, David Zats

    E-Print Network [OSTI]

    California at Berkeley, University of

    An AggreGATE Network Abstraction for Mobile Devices Ganesh Ananthanarayanan, David Zats Motivation Mobile devices increasingly have multiple interfaces (Cellular, Wi-Fi, Bluetooth) Proliferation of mobile decisions at the proxy/mobile device (Power, Cost ($$)) Single mobile device: Uploads to server using proxy

  17. Enhanced Biosensing Resolution with Foundry Fabricated Individually Addressable Dual-Gated ISFETs

    E-Print Network [OSTI]

    Bashir, Rashid

    small signals and increase the sensor accuracy when monitoring small pH dynamics in biological reactions reactions into electrical signals.1,2 In an ISFET, the gate region is exposed to an electrolyte, making,8,9 and ISFETs made with metal oxides and polymers are used to monitor biological activity.10

  18. CONGRESS BEIJING 2000 Question 79 (Gated Spillways and Other Controlled Release Facilities, and Dam Safety)

    E-Print Network [OSTI]

    Rahmeyer, William J.

    Facilities, and Dam Safety) d) Rehabilitation of Gated and Ungated Spillways THE DESIGN OF A FUSEGATE SYSTEM FOR INCREASING THE RESERVOIR CAPACITY OF TERMINUS DAM AIDED BY A FULLY FUNCTIONING PHYSICAL MODEL STUDY" Authors International SUMMARY A number of designs for increasing reservoir capacity without raising the dam embankment

  19. Electric field gating with ionic liquids Rajiv Misra, Mitchell McCarthy, and Arthur F. Hebarda

    E-Print Network [OSTI]

    Hebard, Arthur F.

    of 104 for thin conducting InOx films. The areal capacitances and field effect mobilities noticeably dielectrics and show that a significant field-gate effect on thin films of amor- phous composite InOx can material is a non- porous continuous thin metal film such as low carrier density InOx,10 then excess charge

  20. Gate Reliability Assessment for a Spillway Upgrade Design in Queensland, Australia USSD 2006 Conference Page 1

    E-Print Network [OSTI]

    Bowles, David S.

    then completed using risk-based design criteria to validate the design, and construction is in progress throughout Australia, the standard of safety was evaluated using a risk-based design validation modelGate Reliability Assessment for a Spillway Upgrade Design in Queensland, Australia USSD 2006

  1. Short range micro-power impulse radar with high resolution swept range gate with damped transmit and receive cavities

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1998-01-01

    A radar range finder and hidden object locator is based on ultra-wide band radar with a high resolution swept range gate. The device generates an equivalent time amplitude scan with atypical range of 4 inches to 20 feet, and an analog range resolution as limited by a jitter of on the order of 0.01 inches. A differential sampling receiver is employed to effectively eliminate ringing and other aberrations induced in the receiver by the near proximity of the transmit antenna, so a background subtraction is not needed, simplifying the circuitry while improving performance. Uses of the invention include a replacement of ultrasound devices for fluid level sensing, automotive radar, such as cruise control and parking assistance, hidden object location, such as stud and rebar finding. Also, this technology can be used when positioned over a highway lane to collect vehicle count and speed data for traffic control. Techniques are used to reduce clutter in the receive signal, such as decoupling the receive and transmit cavities by placing a space between them, using conductive or radiative damping elements on the cavities, and using terminating plates on the sides of the openings.

  2. Short range micro-power impulse radar with high resolution swept range gate with damped transmit and receive cavities

    DOE Patents [OSTI]

    McEwan, T.E.

    1998-06-30

    A radar range finder and hidden object locator is based on ultra-wide band radar with a high resolution swept range gate. The device generates an equivalent time amplitude scan with atypical range of 4 inches to 20 feet, and an analog range resolution as limited by a jitter of on the order of 0.01 inches. A differential sampling receiver is employed to effectively eliminate ringing and other aberrations induced in the receiver by the near proximity of the transmit antenna, so a background subtraction is not needed, simplifying the circuitry while improving performance. Uses of the invention include a replacement of ultrasound devices for fluid level sensing, automotive radar, such as cruise control and parking assistance, hidden object location, such as stud and rebar finding. Also, this technology can be used when positioned over a highway lane to collect vehicle count and speed data for traffic control. Techniques are used to reduce clutter in the receive signal, such as decoupling the receive and transmit cavities by placing a space between them, using conductive or radiative damping elements on the cavities, and using terminating plates on the sides of the openings. 20 figs.

  3. Gamma ray generator

    DOE Patents [OSTI]

    Firestone, Richard B; Reijonen, Jani

    2014-05-27

    An embodiment of a gamma ray generator includes a neutron generator and a moderator. The moderator is coupled to the neutron generator. The moderator includes a neutron capture material. In operation, the neutron generator produces neutrons and the neutron capture material captures at least some of the neutrons to produces gamma rays. An application of the gamma ray generator is as a source of gamma rays for calibration of gamma ray detectors.

  4. Generation to Generation: The Heart of Family Medicine

    E-Print Network [OSTI]

    Winter, Robin O

    2012-01-01

    Ageism in the Workplace. Generations Spring, 5. Westman,of caring for multiple generations simultaneously. StronglyGeneration to Generation: The Heart of Family Medicine

  5. SU-E-J-185: Gated CBCT Imaging for Positioning Moving Lung Tumor in Lung SBRT Treatment

    SciTech Connect (OSTI)

    Li, X; Li, T; Zhang, Y; Burton, S; Karlovits, B; Clump, D; Heron, D; Huq, M

    2014-06-01

    Purpose: Lung stereo-tactic body radiotherapy(SBRT) treatment requires high accuracy of lung tumor positioning during treatment, which is usually accomplished by free breathing Cone-Beam computerized tomography (CBCT) scan. However, respiratory motion induced image artifacts in free breathing CBCT may degrade such positioning accuracy. The purpose of this study is to investigate the feasibility of gated CBCT imaging for lung SBRT treatment. Methods: Six Lung SBRT patients were selected for this study. The respiratory motion of the tumors ranged from 1.2cm to 3.5cm, and the gating windows for all patients were set between 35% and 65% of the respiratory phases. Each Lung SBRT patient underwent free-breathing CBCT scan using half-fan scan technique. The acquired projection images were transferred out for off-line analyses. An In-house semi-automatic algorithm was developed to trace the diaphragm movement from those projection images to acquire a patient's specific respiratory motion curve, which was used to correlate respiratory phases with each projection image. Afterwards, a filtered back-projection algorithm was utilized to reconstruct the gated CBCT images based on the projection images only within the gating window. Results: Target volumes determined by free breathing CBCT images were 71.9%±72% bigger than the volume shown in gated CBCT image. On the contrary, the target volume differences between gated CBCT and planning CT images at exhale stage were 5.8%±2.4%. The center to center distance of the targets shown in free breathing CBCT and gated CBCT images were 9.2±8.1mm. For one particular case, the superior boundary of the target was shifted 15mm between free breathing CBCT and gated CBCT. Conclusion: Gated CBCT imaging provides better representation of the moving lung tumor with less motion artifacts, and has the potential to improve the positioning accuracy in lung SBRT treatment.

  6. Cylindrical neutron generator

    DOE Patents [OSTI]

    Leung, Ka-Ngo (Hercules, CA)

    2009-12-29

    A cylindrical neutron generator is formed with a coaxial RF-driven plasma ion source and target. A deuterium (or deuterium and tritium) plasma is produced by RF excitation in a cylindrical plasma ion generator using an RF antenna. A cylindrical neutron generating target is coaxial with the ion generator, separated by plasma and extraction electrodes which contain many slots. The plasma generator emanates ions radially over 360.degree. and the cylindrical target is thus irradiated by ions over its entire circumference. The plasma generator and target may be as long as desired. The plasma generator may be in the center and the neutron target on the outside, or the plasma generator may be on the outside and the target on the inside. In a nested configuration, several concentric targets and plasma generating regions are nested to increase the neutron flux.

  7. Cylindrical neutron generator

    DOE Patents [OSTI]

    Leung, Ka-Ngo (Hercules, CA)

    2008-04-22

    A cylindrical neutron generator is formed with a coaxial RF-driven plasma ion source and target. A deuterium (or deuterium and tritium) plasma is produced by RF excitation in a cylindrical plasma ion generator using an RF antenna. A cylindrical neutron generating target is coaxial with the ion generator, separated by plasma and extraction electrodes which contain many slots. The plasma generator emanates ions radially over 360.degree. and the cylindrical target is thus irradiated by ions over its entire circumference. The plasma generator and target may be as long as desired. The plasma generator may be in the center and the neutron target on the outside, or the plasma generator may be on the outside and the target on the inside. In a nested configuration, several concentric targets and plasma generating regions are nested to increase the neutron flux.

  8. Cylindrical neutron generator

    DOE Patents [OSTI]

    Leung, Ka-Ngo

    2005-06-14

    A cylindrical neutron generator is formed with a coaxial RF-driven plasma ion source and target. A deuterium (or deuterium and tritium) plasma is produced by RF excitation in a cylindrical plasma ion generator using an RF antenna. A cylindrical neutron generating target is coaxial with the ion generator, separated by plasma and extraction electrodes which contain many slots. The plasma generator emanates ions radially over 360.degree. and the cylindrical target is thus irradiated by ions over its entire circumference. The plasma generator and target may be as long as desired. The plasma generator may be in the center and the neutron target on the outside, or the plasma generator may be on the outside and the target on the inside. In a nested configuration, several concentric targets and plasma generating regions are nested to increase the neutron flux.

  9. New wave generation

    E-Print Network [OSTI]

    Mercier, Matthieu J.

    We present the results of a combined experimental and numerical study of the generation of internal waves using the novel internal wave generator design of Gostiaux et al. (Exp. Fluids, vol. 42, 2007, pp. 123–130). This ...

  10. features Utility Generator

    E-Print Network [OSTI]

    Chang, Shih-Fu

    #12;#12;#12;#12;features function utility Training Pool Utility Generator Per-frame function content utility classes utility classes utility Tree Decision Generator Module Utility Clustering Adaptive

  11. Regulation of N-type Voltage-Gated Calcium Channels and Presynaptic Function by Cyclin-Dependent Kinase 5

    E-Print Network [OSTI]

    Su, Susan C.

    N-type voltage-gated calcium channels localize to presynaptic nerve terminals and mediate key events including synaptogenesis and neurotransmission. While several kinases have been implicated in the modulation of calcium ...

  12. The origin and reduction of switching noise in GaAs/AlGaAs lateral gated devices

    E-Print Network [OSTI]

    Davies, John H.

    to cryogenic temperature with all gates grounded to the substrate to protect against electrostatic effects in AlGaAs: electrons `freeze' into deep traps ­ DX centres ­ below about 150 K. The occupation of donors

  13. 224 IEEE ELECTRON DEVICE LETTERS, VOL. 23, NO. 4, APRIL 2002 Gate Length Dependent Polysilicon Depletion Effects

    E-Print Network [OSTI]

    Dutton, Robert W.

    - tribution effect, MOSFET, polydepletion, polysilicon depletion ef- fect. I. INTRODUCTION IN THE dual n -p impurity penetration through the gate oxide, while maintaining the required source/drain junction depths [2

  14. IEEE TRANSACTIONS ON NANOTECHNOLOGY, VOL. 4, NO. 5, SEPTEMBER 2005 599 Quantum Interference in Fully Depleted Tri-Gate

    E-Print Network [OSTI]

    Gilbert, Matthew

    and drain dimen- sions. A uniform 1-nm oxide layer covers the top and sides of the device to isolate the gates from the semiconductor. Under the device is a 100-nm-thick oxide layer. This device is studied

  15. Vehicle Technologies Office Merit Review 2014: GATE Center for Electric Drive Transportation at the University of Michigan- Dearborn

    Broader source: Energy.gov [DOE]

    Presentation given by Regents University of Michigan at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about GATE Center...

  16. A review of the use and potential of the GATE Monte Carlo simulation code for radiation therapy and dosimetry applications

    SciTech Connect (OSTI)

    Sarrut, David; Université Lyon 1; Centre Léon Bérard ; Bardiès, Manuel; Marcatili, Sara; Mauxion, Thibault; Boussion, Nicolas; Freud, Nicolas; Létang, Jean-Michel; Jan, Sébastien; Maigne, Lydia; Perrot, Yann; Pietrzyk, Uwe; Robert, Charlotte; and others

    2014-06-15

    In this paper, the authors' review the applicability of the open-source GATE Monte Carlo simulation platform based on the GEANT4 toolkit for radiation therapy and dosimetry applications. The many applications of GATE for state-of-the-art radiotherapy simulations are described including external beam radiotherapy, brachytherapy, intraoperative radiotherapy, hadrontherapy, molecular radiotherapy, and in vivo dose monitoring. Investigations that have been performed using GEANT4 only are also mentioned to illustrate the potential of GATE. The very practical feature of GATE making it easy to model both a treatment and an imaging acquisition within the same frameworkis emphasized. The computational times associated with several applications are provided to illustrate the practical feasibility of the simulations using current computing facilities.

  17. Cerebellar Purkinje cell death in the P/Q -type voltage-gated calcium ion channel mutant mouse, leaner 

    E-Print Network [OSTI]

    Frank-Cannon, Tamy Catherine

    2006-04-12

    . The leaner mutation causes reduced calcium ion influx upon activation of P/Q-type voltage-gated calcium channels. This disrupts calcium homeostasis and leads to a loss of cerebellar neurons, including cerebellar Purkinje cells. Because of its similarities...

  18. Neurodegeneration in cerebellar granule cells of p/q type voltage gated calcium channel mutant leaner mice 

    E-Print Network [OSTI]

    Bawa, Bhupinder

    2009-05-15

    Mutations of the ?1A subunit of CaV 2.1 voltage gated calcium (VGCC) channels are responsible for several inherited disorders affecting humans, including familial hemiplegic migraine, episodic ataxia type and spinocerebellar ataxia type. The leaner...

  19. A Reconfigurable Gate Architecture for Si/SiGe Quantum Dots

    E-Print Network [OSTI]

    D. M. Zajac; T. M. Hazard; X. Mi; K. Wang; J. R. Petta

    2015-02-05

    We demonstrate a reconfigurable quantum dot gate architecture that incorporates two interchangeable transport channels. One channel is used to form quantum dots and the other is used for charge sensing. The quantum dot transport channel can support either a single or a double quantum dot. We demonstrate few-electron occupation in a single quantum dot and extract charging energies as large as 6.6 meV. Magnetospectroscopy is used to measure valley splittings in the range of 35-70 microeV. By energizing two additional gates we form a few-electron double quantum dot and demonstrate tunable tunnel coupling at the (1,0) to (0,1) interdot charge transition.

  20. A communication-efficient nonlocal measurement with application to communication complexity and bipartite gate capacities

    E-Print Network [OSTI]

    Aram W. Harrow; Debbie W. Leung

    2011-03-04

    Two dual questions in quantum information theory are to determine the communication cost of simulating a bipartite unitary gate, and to determine their communication capacities. We present a bipartite unitary gate with two surprising properties: 1) simulating it with the assistance of unlimited EPR pairs requires far more communication than with a better choice of entangled state, and 2) its communication capacity is far lower than its capacity to create entanglement. This suggests that 1) unlimited EPR pairs are not the most general model of entanglement assistance for two-party communication tasks, and 2) the entangling and communicating abilities of a unitary interaction can vary nearly independently. The technical contribution behind these results is a communication-efficient protocol for measuring whether an unknown shared state lies in a specified rank-one subspace or its orthogonal complement.

  1. Air-gap gating of MgZnO/ZnO heterostructures

    SciTech Connect (OSTI)

    Tambo, T.; Falson, J. Kozuka, Y.; Maryenko, D.; Tsukazaki, A.; Kawasaki, M.

    2014-08-28

    The adaptation of “air-gap” dielectric based field-effect transistor technology to controlling the MgZnO/ZnO heterointerface confined two-dimensional electron system (2DES) is reported. We find it possible to tune the charge density of the 2DES via a gate electrode spatially separated from the heterostructure surface by a distance of 5??m. Under static gating, the observation of the quantum Hall effect suggests that the charge carrier density remains homogeneous, with the 2DES in the 3?mm square sample the sole conductor. The availability of this technology enables the exploration of the charge carrier density degree of freedom in the pristine sample limit.

  2. Double-metal-gate nanocrystalline Si thin film transistors with flexible threshold voltage controllability

    SciTech Connect (OSTI)

    Chiou, Uio-Pu; Pan, Fu-Ming, E-mail: fmpan@faculty.nctu.edu.tw [Department of Materials Science and Engineering, National Chiao-Tung University, Hsinchu 30050, Taiwan (China)] [Department of Materials Science and Engineering, National Chiao-Tung University, Hsinchu 30050, Taiwan (China); Shieh, Jia-Min, E-mail: jmshieh@narlabs.org.tw, E-mail: jmshieh@faculty.nctu.edu.tw [National Nano Device Laboratories, No. 26, Prosperity Road 1, Hsinchu 30078, Taiwan (China) [National Nano Device Laboratories, No. 26, Prosperity Road 1, Hsinchu 30078, Taiwan (China); Departments of Photonics and Institute of Electro-Optical Engineering, National Chiao-Tung University, Hsinchu 30010, Taiwan (China); Yang, Chih-Chao [National Nano Device Laboratories, No. 26, Prosperity Road 1, Hsinchu 30078, Taiwan (China)] [National Nano Device Laboratories, No. 26, Prosperity Road 1, Hsinchu 30078, Taiwan (China); Huang, Wen-Hsien [Department of Materials Science and Engineering, National Chiao-Tung University, Hsinchu 30050, Taiwan (China) [Department of Materials Science and Engineering, National Chiao-Tung University, Hsinchu 30050, Taiwan (China); National Nano Device Laboratories, No. 26, Prosperity Road 1, Hsinchu 30078, Taiwan (China); Kao, Yo-Tsung [Departments of Photonics and Institute of Electro-Optical Engineering, National Chiao-Tung University, Hsinchu 30010, Taiwan (China)] [Departments of Photonics and Institute of Electro-Optical Engineering, National Chiao-Tung University, Hsinchu 30010, Taiwan (China)

    2013-11-11

    We fabricated nano-crystalline Si (nc-Si:H) thin-film transistors (TFTs) with a double-metal-gate structure, which showed a high electron-mobility (?{sub FE}) and adjustable threshold voltages (V{sub th}). The nc-Si:H channel and source/drain (S/D) of the multilayered TFT were deposited at 375?°C by inductively coupled plasma chemical vapor deposition. The low grain-boundary defect density of the channel layer is responsible for the high ?{sub FE} of 370 cm{sup 2}/V-s, a steep subthreshold slope of 90?mV/decade, and a low V{sub th} of ?0.64?V. When biased with the double-gate driving mode, the device shows a tunable V{sub th} value extending from ?1?V up to 2.7?V.

  3. Generating Functions Introduction

    E-Print Network [OSTI]

    Gould, Ron

    CHAPTER 10 Ordinary Generating Functions Introduction We'll begin this chapter by introducing the notion of ordinary generating functions and discussing the basic techniques for manipulating them must master these basic ideas before reading further. In Section 2, we apply generating functions

  4. The Clemson First Generation

    E-Print Network [OSTI]

    Stuart, Steven J.

    The Clemson First Generation Success Program A First-RAte expeRience College is an experience college. First-generation college students are students whose parents do not hold a degree from a four-year college or university. Clemson is proud of its first- generation students and is committed

  5. Superconducting Power Generation

    E-Print Network [OSTI]

    Mario Rabinowitz

    2003-02-20

    The superconducting ac generator has the greatest potential for large-scale commercial application of superconductivity that can benefit the public. Electric power is a vital ingredient of modern society, and generation may be considered to be the vital ingredient of a power system. This articles gives background, and an insight into the physics and engineering of superconducting power generation.

  6. Mesh Generator Matthew Hanlon

    E-Print Network [OSTI]

    Nebel, Jean-Christophe

    1 Mesh Generator Matthew Hanlon 9804817 hanlonmj@dsc.gla.ac.uk Class CS4H Session 2002 from two dimensional slices. Medical data stored as sets of slices can be used to generate a three was developed with the following requirements: · Load a set of slices into the system · Generate a mesh for each

  7. Gated frequency-resolved optical imaging with an optical parametric amplifier for medical applications

    SciTech Connect (OSTI)

    Cameron, S.M.; Bliss, D.E.

    1997-02-01

    Implementation of optical imagery in a diffuse inhomogeneous medium such as biological tissue requires an understanding of photon migration and multiple scattering processes which act to randomize pathlength and degrade image quality. The nature of transmitted light from soft tissue ranges from the quasi-coherent properties of the minimally scattered component to the random incoherent light of the diffuse component. Recent experimental approaches have emphasized dynamic path-sensitive imaging measurements with either ultrashort laser pulses (ballistic photons) or amplitude modulated laser light launched into tissue (photon density waves) to increase image resolution and transmissive penetration depth. Ballistic imaging seeks to compensate for these {open_quotes}fog-like{close_quotes} effects by temporally isolating the weak early-arriving image-bearing component from the diffusely scattered background using a subpicosecond optical gate superimposed on the transmitted photon time-of-flight distribution. The authors have developed a broadly wavelength tunable (470 nm -2.4 {mu}m), ultrashort amplifying optical gate for transillumination spectral imaging based on optical parametric amplification in a nonlinear crystal. The time-gated image amplification process exhibits low noise and high sensitivity, with gains greater than 104 achievable for low light levels. We report preliminary benchmark experiments in which this system was used to reconstruct, spectrally upcovert, and enhance near-infrared two-dimensional images with feature sizes of 65 {mu}m/mm{sup 2} in background optical attenuations exceeding 10{sup 12}. Phase images of test objects exhibiting both absorptive contrast and diffuse scatter were acquired using a self-referencing Shack-Hartmann wavefront sensor in combination with short-pulse quasi-ballistic gating. The sensor employed a lenslet array based on binary optics technology and was sensitive to optical path distortions approaching {lambda}/100.

  8. Fast geometric gate operation of superconducting charge qubits in circuit QED

    E-Print Network [OSTI]

    Zheng-Yuan Xue

    2011-07-09

    A scheme for coupling superconducting charge qubits via a one-dimensional superconducting transmission line resonator is proposed. The qubits are working at their optimal points, where they are immune to the charge noise and possess long decoherence time. Analysis on the dynamical time evolution of the interaction is presented, which is shown to be insensitive to the initial state of the resonator field. This scheme enables fast gate operation and is readily scalable to multiqubit scenario.

  9. Fast cooling of trapped ions using the dynamical Stark shift gate

    E-Print Network [OSTI]

    A. Retzker; M. B. Plenio

    2006-07-27

    A laser cooling scheme for trapped ions is presented which is based on the fast dynamical Stark shift gate, described in [Jonathan etal, PRA 62, 042307]. Since this cooling method does not contain an off resonant carrier transition, low final temperatures are achieved even in traveling wave light field. The proposed method may operate in either pulsed or continuous mode and is also suitable for ion traps using microwave addressing in strong magnetic field gradients.

  10. Simultaneous gates in frequency-crowded multi-level systems using fast, robust analytic control shapes

    E-Print Network [OSTI]

    L. S. Theis; F. Motzoi; F. K. Wilhelm

    2015-09-14

    We present a few-parameter ansatz for pulses to implement arbitrary simultaneous single-qubit rotations in frequency-crowded multi-level systems. Specifically, we consider a system of two qutrits whose working and leakage transitions suffer from spectral crowding (detuned by $\\delta$). In order to achieve precise controllability, we make use of two driving fields (each having two quadratures) at two different tones to implement arbitrary simultaneous rotations. Expanding the waveforms in terms of Hanning windows, we show how analytic pulses containing smooth and composite-pulse features can easily achieve gate errors $<10^{-4}$ and considerably outperform known adiabatic techniques. Moreover, we find a generalization of the WahWah method by Schutjens et al. [Phys. Rev. A 88, 052330 (2013)] that allows precise separate single-qubit rotations for all gate times beyond a quantum speed limit. We find in all cases a quantum speed limit $\\sim 2\\pi/\\delta$ for the gate time and show that our pulses are robust against variations in system parameters and filtering due to transfer functions, making them suitable for experimental implementations.

  11. Suspended InAs nanowire gate-all-around field-effect transistors

    SciTech Connect (OSTI)

    Li, Qiang; Huang, Shaoyun, E-mail: syhuang@pku.edu.cn, E-mail: hqxu@pku.edu.cn; Wang, Jingyun [Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871 (China); Pan, Dong; Zhao, Jianhua [State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 (China); Xu, H. Q., E-mail: syhuang@pku.edu.cn, E-mail: hqxu@pku.edu.cn [Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871 (China); Division of Solid-State Physics, Lund University, Box 118, Lund S-221 00 (Sweden)

    2014-09-15

    Gate-all-around field-effect transistors are realized with thin, single-crystalline, pure-phase InAs nanowires grown by molecular beam epitaxy. At room temperature, the transistors show a desired high on-state current I{sub on} of ?10??A and an on-off current ratio I{sub on}/I{sub off} of as high as 10{sup 6} at source-drain bias voltage of 50?mV and gate length of 1??m with a gate underlap spacing of 1??m from the source and from the drain. At low temperatures, the on-state current I{sub on} is only slightly reduced, while the ratio I{sub on}/I{sub off} is increased to 10{sup 7}. The field-effect mobility in the nanowire channels is also investigated and found to be ?1500?cm{sup 2}/V s at room temperature and ?2000?cm{sup 2}/V s at low temperatures. The excellent performance of the transistors is explained in terms of strong electrostatic and quantum confinements of carriers in the nanowires.

  12. High repetition rate laser-induced breakdown spectroscopy using acousto-optically gated detection

    SciTech Connect (OSTI)

    Po?ízka, Pavel [BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Straße 11, D-12489 Berlin (Germany); Institute of Physical Engineering, Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 61669 Brno (Czech Republic); Klessen, Benjamin; Gornushkin, Igor; Riedel, Jens [BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Straße 11, D-12489 Berlin (Germany); Kaiser, Jozef [Institute of Physical Engineering, Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 61669 Brno (Czech Republic); Panne, Ulrich [BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Straße 11, D-12489 Berlin (Germany); Chemistry Department, Humboldt Universität zu Berlin, Brook-Taylor-Straße 2, D-12489 Berlin (Germany)

    2014-07-15

    This contribution introduces a new type of setup for fast sample analysis using laser-induced breakdown spectroscopy (LIBS). The novel design combines a high repetition rate laser (up to 50 kHz) as excitation source and an acousto-optical modulator (AOM) as a fast switch for temporally gating the detection of the emitted light. The plasma radiation is led through the active medium of the AOM where it is diffracted on the transient ultrasonic Bragg grid. The diffracted radiation is detected by a compact Czerny-Turner spectrometer equipped with a CCD line detector. Utilizing the new combination of high repetition rate lasers and AOM gated detection, rapid measurements with total integration times of only 10 ms resulted in a limit of detection (LOD) of 0.13 wt.% for magnesium in aluminum alloys. This short integration time corresponds to 100 analyses/s. Temporal gating of LIP radiation results in improved LODs and consecutively higher sensitivity of the LIBS setup. Therefore, an AOM could be beneficially utilized to temporally detect plasmas induced by high repetition rate lasers. The AOM in combination with miniaturized Czerny-Turner spectrometers equipped with CCD line detectors and small footprint diode pumped solid state lasers results in temporally gateable compact LIBS setups.

  13. Strip Velocity Measurements for Gated X-Ray Imagers Using Short Pulse Lasers

    SciTech Connect (OSTI)

    Ross, P. W. [NSTec; Cardenas, M. [NSTec; Griffin, M. [NSTec; Mead, A. [NSTec; Silbernagel, C. T. [NSTec; Bell, P. [LLNL; Haque, S. H. [UNR

    2013-09-01

    Strip velocity measurements of gated X-ray imagers are presented using an ultra-short pulse laser. Obtaining time-resolved X-ray images of inertial confinement fusion shots presents a difficult challenge. One diagnostic developed to address this challenge is the gated X-ray imagers. The gated X-ray detectors (GXDs) developed by Lawrence Livermore National Laboratory and Los Alamos National Laboratory use a microchannel plate (MCP) coated with a gold strip line, which serves as a photocathode. GXDs are used with an array of pinholes, which image onto various parts of the GXD image plane. As the pulse sweeps over the strip lines, it creates a time history of the event with consecutive images. In order to accurately interpret the timing of the images obtained using the GXDs, it is necessary to measure the propagation of the pulse over the strip line. The strip velocity was measured using a short pulse laser with a pulse duration of approximately 1-2 ps. The 200nm light from the laser is used to illuminate the GXD MCP. The laser pulse is split and a retroreflective mirror is used to delay one of the legs. By adjusting the distance to the mirror, one leg is temporally delayed compared to the reference leg. The retroreflective setup is calibrated using a streak camera with a 1 ns full sweep. Resolution of 0.5 mm is accomplished to achieve a temporal resolution of ~5 ps on the GXD strip line.

  14. Crystal structure of a two-subunit TrkA octameric gating ring assembly

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

    Deller, Marc C.; Johnson, Hope A.; Miller, Mitchell D.; Spraggon, Glen; Elsliger, Marc -André; Wilson, Ian A.; Lesley, Scott A.; Ye, Sheng

    2015-03-31

    The TM1088 locus of T. maritima codes for two proteins designated TM1088A and TM1088B, which combine to form the cytosolic portion of a putative Trk K? transporter. We report the crystal structure of this assembly to a resolution of 3.45 Å. The high resolution crystal structures of the components of the assembly, TM1088A and TM1088B, were also determined independently to 1.50 Å and 1.55 Å, respectively. The TM1088 proteins are structurally homologous to each other and to other K? transporter proteins, such as TrkA. These proteins form a cytosolic gating ring assembly that controls the flow of K? ions acrossmore »the membrane. TM1088 represents the first structure of a two-subunit Trk assembly. Despite the atypical genetics and chain organization of the TM1088 assembly, it shares significant structural homology and an overall quaternary organization with other single-subunit K? gating ring assemblies. This structure provides the first structural insights into what may be an evolutionary ancestor of more modern single-subunit K? gating ring assemblies.« less

  15. Motor/generator

    DOE Patents [OSTI]

    Hickam, Christopher Dale (Glasford, IL)

    2008-05-13

    A motor/generator is provided for connecting between a transmission input shaft and an output shaft of a prime mover. The motor/generator may include a motor/generator housing, a stator mounted to the motor/generator housing, a rotor mounted at least partially within the motor/generator housing and rotatable about a rotor rotation axis, and a transmission-shaft coupler drivingly coupled to the rotor. The transmission-shaft coupler may include a clamp, which may include a base attached to the rotor and a plurality of adjustable jaws.

  16. Bit error rate tester using fast parallel generation of linear recurring sequences

    DOE Patents [OSTI]

    Pierson, Lyndon G.; Witzke, Edward L.; Maestas, Joseph H.

    2003-05-06

    A fast method for generating linear recurring sequences by parallel linear recurring sequence generators (LRSGs) with a feedback circuit optimized to balance minimum propagation delay against maximal sequence period. Parallel generation of linear recurring sequences requires decimating the sequence (creating small contiguous sections of the sequence in each LRSG). A companion matrix form is selected depending on whether the LFSR is right-shifting or left-shifting. The companion matrix is completed by selecting a primitive irreducible polynomial with 1's most closely grouped in a corner of the companion matrix. A decimation matrix is created by raising the companion matrix to the (n*k).sup.th power, where k is the number of parallel LRSGs and n is the number of bits to be generated at a time by each LRSG. Companion matrices with 1's closely grouped in a corner will yield sparse decimation matrices. A feedback circuit comprised of XOR logic gates implements the decimation matrix in hardware. Sparse decimation matrices can be implemented with minimum number of XOR gates, and therefore a minimum propagation delay through the feedback circuit. The LRSG of the invention is particularly well suited to use as a bit error rate tester on high speed communication lines because it permits the receiver to synchronize to the transmitted pattern within 2n bits.

  17. Method of grid generation

    DOE Patents [OSTI]

    Barnette, Daniel W. (Veguita, NM)

    2002-01-01

    The present invention provides a method of grid generation that uses the geometry of the problem space and the governing relations to generate a grid. The method can generate a grid with minimized discretization errors, and with minimal user interaction. The method of the present invention comprises assigning grid cell locations so that, when the governing relations are discretized using the grid, at least some of the discretization errors are substantially zero. Conventional grid generation is driven by the problem space geometry; grid generation according to the present invention is driven by problem space geometry and by governing relations. The present invention accordingly can provide two significant benefits: more efficient and accurate modeling since discretization errors are minimized, and reduced cost grid generation since less human interaction is required.

  18. Steam generator support system

    DOE Patents [OSTI]

    Moldenhauer, James E. (Simi Valley, CA)

    1987-01-01

    A support system for connection to an outer surface of a J-shaped steam generator for use with a nuclear reactor or other liquid metal cooled power source. The J-shaped steam generator is mounted with the bent portion at the bottom. An arrangement of elongated rod members provides both horizontal and vertical support for the steam generator. The rod members are interconnected to the steam generator assembly and a support structure in a manner which provides for thermal distortion of the steam generator without the transfer of bending moments to the support structure and in a like manner substantially minimizes forces being transferred between the support structure and the steam generator as a result of seismic disturbances.

  19. Steam generator support system

    DOE Patents [OSTI]

    Moldenhauer, J.E.

    1987-08-25

    A support system for connection to an outer surface of a J-shaped steam generator for use with a nuclear reactor or other liquid metal cooled power source is disclosed. The J-shaped steam generator is mounted with the bent portion at the bottom. An arrangement of elongated rod members provides both horizontal and vertical support for the steam generator. The rod members are interconnected to the steam generator assembly and a support structure in a manner which provides for thermal distortion of the steam generator without the transfer of bending moments to the support structure and in a like manner substantially minimizes forces being transferred between the support structure and the steam generator as a result of seismic disturbances. 4 figs.

  20. Thermophotovoltaic energy generation

    DOE Patents [OSTI]

    Celanovic, Ivan; Chan, Walker; Bermel, Peter; Yeng, Adrian Y. X.; Marton, Christopher; Ghebrebrhan, Michael; Araghchini, Mohammad; Jensen, Klavs F.; Soljacic, Marin; Joannopoulos, John D.; Johnson, Steven G.; Pilawa-Podgurski, Robert; Fisher, Peter

    2015-08-25

    Inventive systems and methods for the generation of energy using thermophotovoltaic cells are described. Also described are systems and methods for selectively emitting electromagnetic radiation from an emitter for use in thermophotovoltaic energy generation systems. In at least some of the inventive energy generation systems and methods, a voltage applied to the thermophotovoltaic cell (e.g., to enhance the power produced by the cell) can be adjusted to enhance system performance. Certain embodiments of the systems and methods described herein can be used to generate energy relatively efficiently.

  1. Fourth Generation Majorana Neutrinos

    E-Print Network [OSTI]

    Alexander Lenz; Heinrich Päs; Dario Schalla

    2012-05-02

    We investigate the possibility of a fourth sequential generation in the lepton sector. Assuming neutrinos to be Majorana particles and starting from a recent - albeit weak - evidence for a non-zero admixture of a fourth generation neutrino from fits to weak lepton and meson decays we discuss constraints from neutrinoless double beta decay, radiative lepton decay and like-sign dilepton production at hadron colliders. Also an idea for fourth generation neutrino mass model building is briefly outlined. Here we soften the large hierarchy of the neutrino masses within an extradimensional model that locates each generation on different lepton number violating branes without large hierarchies.

  2. SNE TRAFIC GENERATOR

    Energy Science and Technology Software Center (OSTI)

    003027MLTPL00 Network Traffic Generator for Low-rate Small Network Equipment Software  http://eln.lbl.gov/sne_traffic_gen.html 

  3. Renewable Electricity Generation

    SciTech Connect (OSTI)

    2012-09-01

    This document highlights DOE's Office of Energy Efficiency and Renewable Energy's advancements in renewable electricity generation technologies including solar, water, wind, and geothermal.

  4. Talkin’ Bout Wind Generation

    Office of Energy Efficiency and Renewable Energy (EERE)

    The amount of electricity generated by the wind industry started to grow back around 1999, and since 2007 has been increasing at a rapid pace.

  5. Dual amplitude pulse generator for radiation detectors

    DOE Patents [OSTI]

    Hoggan, Jerry M. (Idaho Falls, ID); Kynaston, Ronnie L. (Blackfoot, ID); Johnson, Larry O. (Island Park, ID)

    2001-01-01

    A pulsing circuit for producing an output signal having a high amplitude pulse and a low amplitude pulse may comprise a current source for providing a high current signal and a low current signal. A gate circuit connected to the current source includes a trigger signal input that is responsive to a first trigger signal and a second trigger signal. The first trigger signal causes the gate circuit to connect the high current signal to a pulse output terminal whereas the second trigger signal causes the gate circuit to connect the low current signal to the pulse output terminal.

  6. Next-generation transcriptome assembly

    E-Print Network [OSTI]

    Martin, Jeffrey A.

    2012-01-01

    technologies - the next generation. Nat Rev Genet 11, 31-algorithms for next-generation sequencing data. Genomicsassembly from next- generation sequencing data. Genome Res

  7. Quantum computation with moving quantum dots generated by surface acoustic waves

    E-Print Network [OSTI]

    X. Shi; M. Zhang; L. F. Wei

    2011-02-15

    Motivated by the recent experimental observations [M. Kataoka et al., Phys. Rev. Lett. {\\bf102}, 156801 (2009)], we propose here an theoretical approach to implement quantum computation with bound states of electrons in moving quantum dots generated by the driving of surface acoustic waves. Differing from static quantum dots defined by a series of static electrodes above the two-dimensional electron gas (2DEG), here a single electron is captured from a 2DEG-reservoir by a surface acoustic wave (SAW) and then trapped in a moving quantum dot (MQD) transporting across a quasi-one dimensional channel (Q1DC), wherein all the electrons have been excluded out by the actions of the surface gates. The flying qubit introduced here is encoded by the two lowest adiabatic levels of the electron in the MQD, and the Rabi oscillation between these two levels could be implemented by applying finely-selected microwave pulses to the surface gates. By using the Coulomb interaction between the electrons in different moving quantum dots, we show that a desirable two-qubit operation, i.e., i-SWAP gate, could be realized. Readouts of the present flying qubits are also feasible with the current single-electron detected technique.

  8. Influence of plasma-based in-situ surface cleaning procedures on HfO2/In0.53Ga0.47As gate stack properties

    E-Print Network [OSTI]

    Chobpattana, Varistha; Mates, Thomas E.; Mitchell, William J.; Zhang, Jack Y.; Stemmer, Susanne

    2013-01-01

    0.53 Ga 0.47 As by atomic layer deposition. We discuss thetreatment prior to atomic layer deposition (ALD) of gate

  9. Laser beam generating apparatus

    DOE Patents [OSTI]

    Warner, B.E.; Duncan, D.B.

    1994-02-15

    Laser beam generating apparatus including a septum segment disposed longitudinally within the tubular structure of the apparatus is described. The septum provides for radiatively dissipating heat buildup within the tubular structure and for generating relatively uniform laser beam pulses so as to minimize or eliminate radial pulse delays (the chevron effect). 7 figures.

  10. Solid aerosol generator

    DOE Patents [OSTI]

    Prescott, D.S.; Schober, R.K.; Beller, J.

    1992-03-17

    An improved solid aerosol generator used to produce a gas borne stream of dry, solid particles of predetermined size and concentration is disclosed. The improved solid aerosol generator nebulizes a feed solution of known concentration with a flow of preheated gas and dries the resultant wet heated aerosol in a grounded, conical heating chamber, achieving high recovery and flow rates. 2 figs.

  11. Improved solid aerosol generator

    DOE Patents [OSTI]

    Prescott, D.S.; Schober, R.K.; Beller, J.

    1988-07-19

    An improved solid aerosol generator used to produce a gas borne stream of dry, solid particles of predetermined size and concentration. The improved solid aerosol generator nebulizes a feed solution of known concentration with a flow of preheated gas and dries the resultant wet heated aerosol in a grounded, conical heating chamber, achieving high recovery and flow rates. 2 figs.

  12. Wroclaw neutrino event generator

    E-Print Network [OSTI]

    Jaroslaw A. Nowak

    2006-07-07

    A neutrino event generator developed by the Wroclaw Neutrino Group is described. The physical models included in the generator are discussed and illustrated with the results of simulations. The considered processes are quasi-elastic scattering and pion production modelled by combining the $\\Delta$ resonance excitation and deep inelastic scattering.

  13. Internal split field generator

    DOE Patents [OSTI]

    Thundat; Thomas George (Knoxville, TN); Van Neste, Charles W. (Kingston, TN); Vass, Arpad Alexander (Oak Ridge, TN)

    2012-01-03

    A generator includes a coil of conductive material. A stationary magnetic field source applies a stationary magnetic field to the coil. An internal magnetic field source is disposed within a cavity of the coil to apply a moving magnetic field to the coil. The stationary magnetic field interacts with the moving magnetic field to generate an electrical energy in the coil.

  14. Laser beam generating apparatus

    DOE Patents [OSTI]

    Warner, B.E.; Duncan, D.B.

    1993-12-28

    Laser beam generating apparatus including a septum segment disposed longitudinally within the tubular structure of the apparatus. The septum provides for radiatively dissipating heat buildup within the tubular structure and for generating relatively uniform laser beam pulses so as to minimize or eliminate radial pulse delays (the chevron effect). 11 figures.

  15. Universal hyperparallel hybrid photonic quantum gates with dipole-induced transparency in the weak-coupling regime

    E-Print Network [OSTI]

    Bao-Cang Ren; Guan-Yu Wang; Fu-Guo Deng

    2015-04-01

    We present the dipole induced transparency (DIT) of a diamond nitrogen-vacancy center embedded in a photonic crystal cavity coupled to two waveguides, and it is obvious with the robust and flexible reflectance and transmittance difference of circularly polarized lights between the uncoupled and the coupled cavities even in the bad cavity regime (the Purcell regime). With this DIT, we propose two universal hyperparallel hybrid photonic quantum logic gates, including a hybrid hyper-controlled-not gate and a hybrid hyper-Toffoli gate, on photon systems in both the polarization and the spatial-mode degrees of freedom (DOFs), which are equal to two identical quantum logic gates operating simultaneously on the systems in one DOF. They can be used to perform more quantum operations with less resources in the quantum information protocols with multi-qubit systems in several DOFs, which may depress the resources consumed and the photonic dissipation. Moreover, they are more robust against asymmetric environment noise in the weak-coupling regime, compared with the integration of two cascaded quantum logic gates in one DOF.

  16. SU-E-J-59: Effective Adaptive DMLC Gated Radiotherapy with OAR Sparing

    SciTech Connect (OSTI)

    Chen, Y; Wu, H; Zhou, Z; Sandison, MinGeorge

    2014-06-01

    Purpose: Patient respiratory motion degrades the effectiveness of cancer radiation treatment. Advanced respiratory gating delivers radiation dose accurately yet with elongated treatment time. The goal of this research is to propose a novel adaptive dMLC dynamic gating with high delivery efficiency and precision. Methods: The dose delivery of dMLC is aided by simultaneous tracking of tumor and organ at risk (OAR). The leaf opening/closing will follow the motion trajectory of the tumor while sparing the OAR. The treatment beam turns on only when there is no overlapping between OAR and tumor in BEV. A variety of evaluation metrics were considered and calculated, including duty cycle, beam toggling rate, and direct irradiation avoidance to OAR, under various combinations of different tumor margins and the distance between the centers of the tumor and OAR in BEV (expressed as dx). Results: Retrospective simulation was performed to investigate the feasibility and superiority of this technique using four groups of synchronized tumor and OAR motion data. The simulation results indicate that the tumor and OAR motion patterns and their relative positions are the dominant influential factors. The duty cycle can be greater than 96.71% yet can be as low as 6.69% depending different motion groups. This proposed technique provides good OAR protection, especially for such cases with low duty cycle for which as high as 77.71% maximal direct irradiation to OAR can be spared. Increasing dx improves the duty cycle (treatment efficiency) and provides better OAR volume sparing, whereas, that of the tumor margins has the opposite influence. Conclusion: This real-time adaptive dMLC gated radiation treatment with synchronous tumor and OAR tracking has inherent accurate dose delivery to tumor with reduced treatment time. In addition, the OAR protection capability make it an outstanding potential treatment strategy for mobile tumors.

  17. Cloning and first functional characterization of a plant cyclic nucleotide-gated cation channel

    SciTech Connect (OSTI)

    Leng, Q.; Mercier, R.W.; Yao, W.; Berkowitz, G.A.

    1999-11-01

    Cyclic nucleotide-gated (cng) non-selective cation channels have been cloned from a number of animal systems. These channels are characterized by direct gating upon cAMO or cGMO binding to the intracellular portion of the channel protein, which leads to an increase in channel conductance. Animal cng channels are involved in signal transduction systems; they translate stimulus-induced changes in cytosolic cyclic nucleotide into altered cell membrane potential and/or cation flux as part of a signal cascade pathway. Putative plant homologs of animal cng channels have been identified. However, functional characterization (i.e., demonstration of cyclic-nucleotide-dependent ion currents) of a plant cng channel has not yet been accomplished. The authors report the cloning and first functional characterization of a plant member of this family of ion channels. The Arabidopsis cDNA AtCNGC2 encodes a polypeptide with deduced homology to the {alpha}-subunit of animal channels, and facilitates cyclic nucleotide-dependent cation currents upon expression in a number of heterologous systems. AtCNGC2 expression in a yeast mutant lacking a low-affinity K{sup +} uptake system complements growth inhibition only when lipophilic nucleotides are present in the culture medium. Voltage clamp analysis indicates that Xenopus lawvis oocytes injected with AtCNGC2 cRNA demonstrate cyclic-nucleotide-dependent, inward-rectifying K{sup +} currents. Human embryonic kidney cells (HEK293) transfected with AtCNGC2 cDNA demonstrate increased permeability to Ca{sup 2+} only in the presence of lipophilic cyclic nucleotides. The evidence presented here supports the functional classification of AtCNGC2 as a cyclic-nucleotide-gated cation channel, and presents the first direct evidence identifying a plant member of this ion channel family.

  18. General quantum two-players games, their gate operators and Nash equilibria

    E-Print Network [OSTI]

    Katarzyna Bolonek-Laso?

    2015-03-30

    The two-players $N$ strategies games quantized according to the Eisert-Lewenstein-Wilkens scheme (Phys. Rev. Lett. 83 (1999), 3077) are considered. Group theoretical methods are applied to the problem of finding a general form of gate operators (entanglers) under the assumption that the set of classical pure strategies is contained in the set of pure quantum ones. The role of the stability group of the initial state of the game is stressed. As an example, it is shown that the maximally entangled games do not admit nontrivial pure Nash strategies. The general arguments are supported by explicit computations performed in the three strategies case.

  19. Characterization of voltage-gated ionic currents in a peripheral sensory neuron in larval Drosophila

    E-Print Network [OSTI]

    Nair, Amit; Bate, Michael; Pulver, Stefan R

    2010-06-02

    and Shab K+ currents to neuronal firing patterns in Drosophila. J Neurophysiol 2007, 97(1):780-794. 2. O'Dowd DK, Aldrich RW: Voltage-clamp analysis of sodium channels in wild-type and mutant Drosophila neurons. J Neurosci 1988, 8(10):3633-3643. 3. O... 'Dowd DK: Voltage-gated currents and firing properties of embryonic Drosophila neurons grown in a chemically defined medium. J Neurobiol 1995, 27(1):113-126. 4. Saito M, Wu CF: Ionic channels in cultured Drosophila neurons. EXS 1993, 63:366-389. 5...

  20. Field programmable gate array-assigned complex-valued computation and its limits

    SciTech Connect (OSTI)

    Bernard-Schwarz, Maria, E-mail: maria.bernardschwarz@ni.com [National Instruments, Ganghoferstrasse 70b, 80339 Munich (Germany); Institute of Applied Physics, TU Wien, Wiedner Hauptstrasse 8, 1040 Wien (Austria); Zwick, Wolfgang; Klier, Jochen [National Instruments, Ganghoferstrasse 70b, 80339 Munich (Germany); Wenzel, Lothar [National Instruments, 11500 N MOPac Expy, Austin, Texas 78759 (United States); Gröschl, Martin [Institute of Applied Physics, TU Wien, Wiedner Hauptstrasse 8, 1040 Wien (Austria)

    2014-09-15

    We discuss how leveraging Field Programmable Gate Array (FPGA) technology as part of a high performance computing platform reduces latency to meet the demanding real time constraints of a quantum optics simulation. Implementations of complex-valued operations using fixed point numeric on a Virtex-5 FPGA compare favorably to more conventional solutions on a central processing unit. Our investigation explores the performance of multiple fixed point options along with a traditional 64 bits floating point version. With this information, the lowest execution times can be estimated. Relative error is examined to ensure simulation accuracy is maintained.

  1. Surface mobility near threshold and other parameters of insulated gate field effect transistors

    E-Print Network [OSTI]

    Gnadinger, Alfred P.

    1970-01-01

    in detail. The IGFETs are made on standard 1­V diameter n­type silicon wafers with a starting resistivity of 3 ­ 7 ohm­cm corresponding to a 1 fx ~3 1 s —3 doping density of 7 x 10 cm to 1.5 x 10 cm . After cleaning, the... MOBILITY NEAR THRESHOLD AND OTHER PARAMETERS OF INSULATED GATE FIELD EFFECT TRANSISTORS BY Alfred P. Gnadinger Dipl. El. Ing. ETH Swiss Federal Institute of Technology, Zurich, 1965 M.S.E.E, University of Kansas, Lawrence, 1968 Submitted to the Department of Electrical v Engineering...

  2. Chi-Nu "Gate Review" (Conference) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing Bacteria (TechnicalTransmission,TextitSciTechin ComplexChi-Nu "Gate Review"

  3. Compact neutron generator

    DOE Patents [OSTI]

    Leung, Ka-Ngo; Lou, Tak Pui

    2005-03-22

    A compact neutron generator has at its outer circumference a toroidal shaped plasma chamber in which a tritium (or other) plasma is generated. A RF antenna is wrapped around the plasma chamber. A plurality of tritium ion beamlets are extracted through spaced extraction apertures of a plasma electrode on the inner surface of the toroidal plasma chamber and directed inwardly toward the center of neutron generator. The beamlets pass through spaced acceleration and focusing electrodes to a neutron generating target at the center of neutron generator. The target is typically made of titanium tubing. Water is flowed through the tubing for cooling. The beam can be pulsed rapidly to achieve ultrashort neutron bursts. The target may be moved rapidly up and down so that the average power deposited on the surface of the target may be kept at a reasonable level. The neutron generator can produce fast neutrons from a T-T reaction which can be used for luggage and cargo interrogation applications. A luggage or cargo inspection system has a pulsed T-T neutron generator or source at the center, surrounded by associated gamma detectors and other components for identifying explosives or other contraband.

  4. Graph Generator Survey

    SciTech Connect (OSTI)

    Lothian, Josh; Powers, Sarah S; Sullivan, Blair D; Baker, Matthew B; Schrock, Jonathan; Poole, Stephen W

    2013-12-01

    The benchmarking effort within the Extreme Scale Systems Center at Oak Ridge National Laboratory seeks to provide High Performance Computing benchmarks and test suites of interest to the DoD sponsor. The work described in this report is a part of the effort focusing on graph generation. A previously developed benchmark, SystemBurn, allowed the emulation of dierent application behavior profiles within a single framework. To complement this effort, similar capabilities are desired for graph-centric problems. This report examines existing synthetic graph generator implementations in preparation for further study on the properties of their generated synthetic graphs.

  5. Synthetic guide star generation

    DOE Patents [OSTI]

    Payne, Stephen A. (Castro Valley, CA) [Castro Valley, CA; Page, Ralph H. (Castro Valley, CA) [Castro Valley, CA; Ebbers, Christopher A. (Livermore, CA) [Livermore, CA; Beach, Raymond J. (Livermore, CA) [Livermore, CA

    2008-06-10

    A system for assisting in observing a celestial object and providing synthetic guide star generation. A lasing system provides radiation at a frequency at or near 938 nm and radiation at a frequency at or near 1583 nm. The lasing system includes a fiber laser operating between 880 nm and 960 nm and a fiber laser operating between 1524 nm and 1650 nm. A frequency-conversion system mixes the radiation and generates light at a frequency at or near 589 nm. A system directs the light at a frequency at or near 589 nm toward the celestial object and provides synthetic guide star generation.

  6. Synthetic guide star generation

    SciTech Connect (OSTI)

    Payne, Stephen A.; Page, Ralph H.; Ebbers, Christopher A.; Beach, Raymond J.

    2004-03-09

    A system for assisting in observing a celestial object and providing synthetic guide star generation. A lasing system provides radiation at a frequency at or near 938 nm and radiation at a frequency at or near 1583 nm. The lasing system includes a fiber laser operating between 880 nm and 960 nm and a fiber laser operating between 1524 nm and 1650 nm. A frequency-conversion system mixes the radiation and generates light at a frequency at or near 589 nm. A system directs the light at a frequency at or near 589 nm toward the celestial object and provides synthetic guide star generation.

  7. Physics of gate leakage current in N-polar InAlN/GaN heterojunction field effect transistors

    SciTech Connect (OSTI)

    Goswami, Arunesh; Trew, Robert J.; Bilbro, Griff L.

    2014-10-28

    A physics based model of the gate leakage current in N-polar InAlN/GaN heterojunction field effect transistors is demonstrated. The model is based on the space charge limited current flow dominated by the effects of deep traps in the InAlN surface layer. The model predicts accurately the gate-leakage measurement data of the N-polar InAlN/GaN device with InAlN cap layer. In the pinch-off state, the gate leakage current conduction through the surface of the device in the drain access region dominates the current flow through the two dimensional electron gas channel. One deep trap level and two levels of shallow traps are extracted by fitting the model results with measurement data.

  8. Extremely scaled high-k/In?.??Ga?.??As gate stacks with low leakage and low interface trap densities

    SciTech Connect (OSTI)

    Chobpattana, Varistha; Mikheev, Evgeny; Zhang, Jack Y.; Mates, Thomas E.; Stemmer, Susanne

    2014-09-28

    Highly scaled gate dielectric stacks with low leakage and low interface trap densities are required for complementary metal-oxide-semiconductor technology with III-V semiconductor channels. Here, we show that a novel pre-deposition technique, consisting of alternating cycles of nitrogen plasma and tetrakis(dimethylamino)titanium, allows for HfO? and ZrO? gate stacks with extremely high accumulation capacitance densities of more than 5 ?F/cm? at 1 MHz, low leakage current, low frequency dispersion, and low midgap interface trap densities (10¹²cm?²eV?¹range). Using x-ray photoelectron spectroscopy, we show that the interface contains TiO? and small quantities of In?O?, but no detectable Ga- or As-oxides, or As-As bonding. The results allow for insights into the microscopic mechanisms that control leakage and frequency dispersion in high-k/III-V gate stacks.

  9. Gate Access

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFESOpportunities Nuclearlong version)short

  10. Energy and Mass Generation

    E-Print Network [OSTI]

    Burra G. Sidharth

    2010-03-11

    Modifications in the energy momentum dispersion laws due to a noncommutative geometry, have been considered in recent years. We examine the oscillations of extended objects in this perspective and find that there is now a "generation" of energy.

  11. QCD Event Generators

    E-Print Network [OSTI]

    I. G. Knowles; T. Sjostrand; A. Blondel; A. Boehrer; C. D. Buchanan; D. G. Charlton; S. -L. Chu; S. Chun; G. Dissertori; D. Duchesneau; J. W. Gary; M. Gibbs; A. Grefrath; G. Gustafson; J. Hakkinen; K. Hamacher; K. Kato; L. Lonnblad; W. Metzger; R. Moller; T. Munehisa; R. Odorico; Y. Pei; G. Rudolph; S. Sarkar; M. H. Seymour; J. C. Thompson; S. Todorova; B. R. Webber

    1996-01-04

    This report is a survey on QCD Event Generator issues of relevance for LEP 2. It contains four main sections: a summary of experience from LEP 1, extrapolations to LEP 2 energies, Monte Carlo descriptions and standardization issues.

  12. Contextualizing generative design

    E-Print Network [OSTI]

    Arida, Saeed, 1977-

    2004-01-01

    Generative systems have been widely used to produce two- and three-dimensional constructs, in an attempt to escape from our preconceptions and pre-existing spatial language. The challenge is to use this mechanism in ...

  13. Generating electricity from viruses

    ScienceCinema (OSTI)

    Lee, Seung-Wuk

    2014-06-23

    Berkeley Lab's Seung-Wuk Lee discusses "Generating electricity from viruses" in this Oct. 28, 2013 talk, which is part of a Science at the Theater event entitled Eight Big Ideas.

  14. Fourth Generation Bound States

    E-Print Network [OSTI]

    Koji Ishiwata; Mark B. Wise

    2011-05-25

    We investigate the spectrum and wave functions of {\\bar q}'q' bound states for heavy fourth generation quarks (q') that have a very small mixing with the three observed generations of standard model quarks. Such bound states come with different color, spin and flavor quantum numbers. Since the fourth generation Yukawa coupling, \\lambda_{q'}, is large we include all perturbative corrections to the potential between the heavy quark and antiquark of order \\lambda_{q'}^2N_c/16\\pi^2 where N_c is the number of colors, as well as relativistic corrections suppressed by (v/c)^2. We find that the lightest fourth generation quark masses for which a bound state exists for color octet states. For the the color singlet states, which always have a bound state, we analyze the influence that the Higgs couplings have on the size and binding energy of the bound states.

  15. Scram signal generator

    DOE Patents [OSTI]

    Johanson, Edward W. (New Lenox, IL); Simms, Richard (Westmont, IL)

    1981-01-01

    A scram signal generating circuit for nuclear reactor installations monitors a flow signal representing the flow rate of the liquid sodium coolant which is circulated through the reactor, and initiates reactor shutdown for a rapid variation in the flow signal, indicative of fuel motion. The scram signal generating circuit includes a long-term drift compensation circuit which processes the flow signal and generates an output signal representing the flow rate of the coolant. The output signal remains substantially unchanged for small variations in the flow signal, attributable to long term drift in the flow rate, but a rapid change in the flow signal, indicative of a fast flow variation, causes a corresponding change in the output signal. A comparator circuit compares the output signal with a reference signal, representing a given percentage of the steady state flow rate of the coolant, and generates a scram signal to initiate reactor shutdown when the output signal equals the reference signal.

  16. Vector generator scan converter

    DOE Patents [OSTI]

    Moore, James M. (Livermore, CA); Leighton, James F. (Livermore, CA)

    1990-01-01

    High printing speeds for graphics data are achieved with a laser printer by transmitting compressed graphics data from a main processor over an I/O (input/output) channel to a vector generator scan converter which reconstructs a full graphics image for input to the laser printer through a raster data input port. The vector generator scan converter includes a microprocessor with associated microcode memory containing a microcode instruction set, a working memory for storing compressed data, vector generator hardward for drawing a full graphic image from vector parameters calculated by the microprocessor, image buffer memory for storing the reconstructed graphics image and an output scanner for reading the graphics image data and inputting the data to the printer. The vector generator scan converter eliminates the bottleneck created by the I/O channel for transmitting graphics data from the main processor to the laser printer, and increases printer speed up to thirty fold.

  17. Vector generator scan converter

    DOE Patents [OSTI]

    Moore, J.M.; Leighton, J.F.

    1988-02-05

    High printing speeds for graphics data are achieved with a laser printer by transmitting compressed graphics data from a main processor over an I/O channel to a vector generator scan converter which reconstructs a full graphics image for input to the laser printer through a raster data input port. The vector generator scan converter includes a microprocessor with associated microcode memory containing a microcode instruction set, a working memory for storing compressed data, vector generator hardware for drawing a full graphic image from vector parameters calculated by the microprocessor, image buffer memory for storing the reconstructed graphics image and an output scanner for reading the graphics image data and inputting the data to the printer. The vector generator scan converter eliminates the bottleneck created by the I/O channel for transmitting graphics data from the main processor to the laser printer, and increases printer speed up to thirty fold. 7 figs.

  18. Oscillating fluid power generator

    DOE Patents [OSTI]

    Morris, David C

    2014-02-25

    A system and method for harvesting the kinetic energy of a fluid flow for power generation with a vertically oriented, aerodynamic wing structure comprising one or more airfoil elements pivotably attached to a mast. When activated by the moving fluid stream, the wing structure oscillates back and forth, generating lift first in one direction then in the opposite direction. This oscillating movement is converted to unidirectional rotational movement in order to provide motive power to an electricity generator. Unlike other oscillating devices, this device is designed to harvest the maximum aerodynamic lift forces available for a given oscillation cycle. Because the system is not subjected to the same intense forces and stresses as turbine systems, it can be constructed less expensively, reducing the cost of electricity generation. The system can be grouped in more compact clusters, be less evident in the landscape, and present reduced risk to avian species.

  19. Generating electricity from viruses

    SciTech Connect (OSTI)

    Lee, Seung-Wuk

    2013-10-31

    Berkeley Lab's Seung-Wuk Lee discusses "Generating electricity from viruses" in this Oct. 28, 2013 talk, which is part of a Science at the Theater event entitled Eight Big Ideas.

  20. Biomass for Electricity Generation

    Reports and Publications (EIA)

    2002-01-01

    This paper examines issues affecting the uses of biomass for electricity generation. The methodology used in the National Energy Modeling System to account for various types of biomass is discussed, and the underlying assumptions are explained.

  1. Innovative Self- Generating Projects 

    E-Print Network [OSTI]

    Kelly, L.

    2013-01-01

    ? All rights reserved. Case Studies on Canadian Customer Generation Projects Innovative Self-Generation Projects Liam Kelly, M.A.Sc, CMVP Energy Engineer Willis Energy Services A CLEAResult company ESL-IE-13-05-06 Proceedings of the Thrity...-05-06 Proceedings of the Thrity-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 ? 2013 CLEAResult ? All rights reserved. Overcoming Challenges ? Look for innovative opportunities ? Leverage available incentives ? Quantify other...

  2. Electrical behavior of atomic layer deposited high quality SiO{sub 2} gate dielectric

    SciTech Connect (OSTI)

    Pradhan, Sangram K.; Tanyi, Ekembu K.; Skuza, Jonathan R.; Xiao, Bo; Pradhan, Aswini K., E-mail: apradhan@nsu.edu [Center for Materials Research, Norfolk State University, 700 Park Ave., Norfolk, Virginia 23504 (United States)

    2015-01-01

    Comprehensive and systematic electrical studies were performed on fabrication of high quality SiO{sub 2} thin films MOS capacitor using the robust, novel, and simple atomic layer deposition (ALD) technique using highly reactive ozone and tris (dimethylamino) silane (TDMAS) precursors. Ideal capacitance–voltage curve exhibits a very small frequency dispersion and hysteresis behavior of the SiO{sub 2} MOS capacitor grown at 1?s TDMAS pulse, suggesting excellent interfacial quality and purity of the film as probed using x-ray photoelectron studies. The flat-band voltage of the device shifted from negative toward positive voltage axis with increase of TDMAS pulses from 0.2 to 2 s. Based on an equivalent oxide thickness point of view, all SiO{sub 2} films have gate leakage current density of (5.18?×?10{sup ?8} A/cm{sup 2}) as well as high dielectric break down fields of more than (?10 MV/cm), which is better and comparable to that of thermally grown SiO{sub 2} at temperatures above 800?°C. These appealing electrical properties of ALD grown SiO{sub 2} thin films enable its potential applications such as high-quality gate insulators for thin film MOS transistors, as well as insulators for sensor and nanostructures on nonsilicon substrates.

  3. Kinetic gating mechanism of DNA damage recognition by Rad4/XPC

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

    Chen, Xuejing; Velmurugu, Yogambigai; Zheng, Guanqun; Park, Beomseok; Shim, Yoonjung; Kim, Youngchang; Liu, Lili; Van Houten, Bennett; He, Chuan; Ansari, Anjum; et al

    2015-01-06

    The xeroderma pigmentosum C (XPC) complex initiates nucleotide excision repair by recognizing DNA lesions before recruiting downstream factors. How XPC detects structurally diverse lesions embedded within normal DNA is unknown. Here we present a crystal structure that captures the yeast XPC orthologue (Rad4) on a single register of undamaged DNA. The structure shows that a disulphide-tethered Rad4 flips out normal nucleotides and adopts a conformations similar to that seen with damaged DNA. Contrary to many DNA repair enzymes that can directly reject non-target sites as structural misfits, our results suggest that Rad4/XPC uses a kinetic gating mechanism whereby lesion selectivitymore »arises from the kinetic competition between DNA opening and the residence time of Rad4/XPC per site. This mechanism is further supported by measurements of Rad4-induced lesion-opening times using temperature-jump pertubation spectroscopy. Kinetic gating may be a general mechanism used by site-specific DNA-binding proteins to minimize time-consuming interrogations of non-target sites.« less

  4. Tuning the Gate Opening Pressure of Metal Organic Frameworks (MOFs) for the Selective Separation of Hydro-carbons

    E-Print Network [OSTI]

    Nijem, Nour; Canepa, Pieremanuele; Marti, Anne; Balkus,, Kenneth J; Thonhauser, T; Li, Jing; Chabal, Yves J; 10.1021/ja305754f

    2012-01-01

    Separation of hydrocarbons is one of the most energy demanding processes. The need to develop materials for the selective adsorption of hydrocarbons, under reasonable conditions, is therefore of paramount importance. This work unveils unexpected hydrocarbon selectivity in a flexible Metal Organic Framework (MOF), based on differences in their gate opening pressure. We show selectivity dependence on both chain length and specific framework-gas interaction. Combining Raman spectroscopy and theoretical van der Waals Density Functional (vdW-DF) calculations, the separation mechanisms governing this unexpected gate opening behavior are revealed.

  5. IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 19, NO. 4, APRIL 2009 215 The Island-Gate Varactor--A High-Q MOS

    E-Print Network [OSTI]

    Rieh, Jae-Sung

    IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 19, NO. 4, APRIL 2009 215 The Island varactors with the same ground rule and gate area. The proposed island-gate MOS varactor is expected) and the 77 GHz automotive radar systems. One key circuit block that is needed for both receiver

  6. Thermoelectric properties of electrically gated bismuth telluride nanowires I. Bejenari,1,2,* V. Kantser,2, and A. A. Balandin1,

    E-Print Network [OSTI]

    Thermoelectric properties of electrically gated bismuth telluride nanowires I. Bejenari,1,2,* V can modify thermoelectric properties of intrinsic, n-type and p-type bismuth telluride nanowires, and thermoelectric figure of merit on the nanowire thickness, gate voltage, and excess hole electron concentration

  7. 21SPIRAL LIBRARY GENERATOR SPIRAL: A GENERATOR FOR

    E-Print Network [OSTI]

    Moura, José

    21SPIRAL LIBRARY GENERATOR SPIRAL: A GENERATOR FOR PLATFORM-ADAPTED LIBRARIES OF SIGNAL PROCESSING Manuela Veloso6 Robert W. Johnson7 Abstract SPIRAL is a generator for libraries of fast software imple perform- ance of SPIRAL generated code. Key words: program generation, automatic performance tuning

  8. Generating a Generator Department of Computer and Information Sciences

    E-Print Network [OSTI]

    Gray, Jeffrey G.

    Generating a Generator Jeff Gray Department of Computer and Information Sciences University. A key to this future work will be the generation of a generator from an XML DTD or schema. 1 for crosscutting modeling concerns, a combination of an aspect-oriented [6] and generative programming [2] approach

  9. A KNOWLEDGE-BASED CODE GENERATOR GENERATOR Christopher W. Fraser %

    E-Print Network [OSTI]

    Fraser, Christopher W.

    A KNOWLEDGE-BASED CODE GENERATOR GENERATOR Christopher W. Fraser % Department of Computer Science a good local code generator for an ALGOL-like language. It is organized as a production system of rules generation of compilers. Automatic generation of some compiler modules is already available; for example

  10. Update and Expansion of the Center of Automotive Technology Excellence Under the Graduate Automotive Technology Education (GATE) Program at the University of Tennessee, Knoxville

    SciTech Connect (OSTI)

    Irick, David

    2012-08-30

    The Graduate Automotive Technology Education (GATE) Center at the University of Tennessee, Knoxville has completed its seventh year of operation under this agreement, its thirteenth year in total. During this period the Center has involved eleven GATE Fellows and three GATE Research Assistants in preparing them to contribute to advanced automotive technologies in the center’s focus area: Advanced Hybrid Propulsion and Control Systems. In addition to the impact that the Center has had on the students and faculty involved, the presence of the center has led to the acquisition of resources that probably would not have been obtained if the GATE Center had not existed. Significant industry interaction such as equipment donations, and support for GATE students has been realized. The value of the total resources brought to the university (including related research contracts) exceeds $2,000,000.

  11. Using Backup Generators: Choosing the Right Backup Generator...

    Energy Savers [EERE]

    overheated, which may cause the generator to fail. Make sure your generator produces more power than will be drawn by the electrical devices you connect to the generator, including...

  12. Superconducting thermoelectric generator

    DOE Patents [OSTI]

    Metzger, J.D.; El-Genk, M.S.

    1994-01-01

    Thermoelectricity is produced by applying a temperature differential to dissimilar electrically conducting or semiconducting materials, thereby producing a voltage that is proportional to the temperature difference. Thermoelectric generators use this effect to directly convert heat into electricity; however, presently-known generators have low efficiencies due to the production of high currents which in turn cause large resistive heating losses. Some thermoelectric generators operate at efficiencies between 4% and 7% in the 800{degrees} to 1200{degrees}C range. According to its major aspects and bradly stated, the present invention is an apparatus and method for producing electricity from heat. In particular, the invention is a thermoelectric generator that juxtaposes a superconducting material and a semiconducting material - so that the superconducting and the semiconducting materials touch - to convert heat energy into electrical energy without resistive losses in the temperature range below the critical temperature of the superconducting material. Preferably, an array of superconducting material is encased in one of several possible configurations within a second material having a high thermal conductivity, preferably a semiconductor, to form a thermoelectric generator.

  13. MHD Generating system

    DOE Patents [OSTI]

    Petrick, Michael (Joliet, IL); Pierson, Edward S. (Chicago, IL); Schreiner, Felix (Mokena, IL)

    1980-01-01

    According to the present invention, coal combustion gas is the primary working fluid and copper or a copper alloy is the electrodynamic fluid in the MHD generator, thereby eliminating the heat exchangers between the combustor and the liquid-metal MHD working fluids, allowing the use of a conventional coalfired steam bottoming plant, and making the plant simpler, more efficient and cheaper. In operation, the gas and liquid are combined in a mixer and the resulting two-phase mixture enters the MHD generator. The MHD generator acts as a turbine and electric generator in one unit wherein the gas expands, drives the liquid across the magnetic field and thus generates electrical power. The gas and liquid are separated, and the available energy in the gas is recovered before the gas is exhausted to the atmosphere. Where the combustion gas contains sulfur, oxygen is bubbled through a side loop to remove sulfur therefrom as a concentrated stream of sulfur dioxide. The combustor is operated substoichiometrically to control the oxide level in the copper.

  14. MCNP LWR Core Generator

    SciTech Connect (OSTI)

    Fischer, Noah A.

    2012-08-14

    The reactor core input generator allows for MCNP input files to be tailored to design specifications and generated in seconds. Full reactor models can now easily be created by specifying a small set of parameters and generating an MCNP input for a full reactor core. Axial zoning of the core will allow for density variation in the fuel and moderator, with pin-by-pin fidelity, so that BWR cores can more accurately be modeled. LWR core work in progress: (1) Reflectivity option for specifying 1/4, 1/2, or full core simulation; (2) Axial zoning for moderator densities that vary with height; (3) Generating multiple types of assemblies for different fuel enrichments; and (4) Parameters for specifying BWR box walls. Fuel pin work in progress: (1) Radial and azimuthal zoning for generating further unique materials in fuel rods; (2) Options for specifying different types of fuel for MOX or multiple burn assemblies; (3) Additional options for replacing fuel rods with burnable poison rods; and (4) Control rod/blade modeling.

  15. FIRST-GENERATION COLLEGE STUDENTS

    E-Print Network [OSTI]

    Su, Xiao

    FIRST-GENERATION COLLEGE STUDENTS PROGRAM AT SAN JOSÉ STATE UNIVERSITY INTERESTED IN PARTICIPATING OUR WEBSITE: sjsu.edu/studentaffairs/ current_students/first- generation/generate We are currently located in MOD A in the MOSAIC Cross- Cultural Center. Visit us today! WHAT IS GENERATE? GENERATE

  16. Thermoacoustic magnetohydrodynamic electrical generator

    SciTech Connect (OSTI)

    Wheatley, J.C.; Swift, G.W.; Migliori, A.

    1984-11-16

    A thermoacoustic magnetohydrodynamic electrical generator includes an intrinsically irreversible thermoacoustic heat engine coupled to a magnetohydrodynamic electrical generator. The heat engine includes an electrically conductive liquid metal as the working fluid and includes two heat exchange and thermoacoustic structure assemblies which drive the liquid in a push-pull arrangement to cause the liquid metal to oscillate at a resonant acoustic frequency on the order of 1000 Hz. The engine is positioned in the field of a magnet and is oriented such that the liquid metal oscillates in a direction orthogonal to the field of the magnet, whereby an alternating electrical potential is generated in the liquid metal. Low-loss, low-inductance electrical conductors electrically connected to opposite sides of the liquid metal conduct an output signal to a transformer adapted to convert the low-voltage, high-current output signal to a more usable higher voltage, lower current signal.

  17. Thermoacoustic magnetohydrodynamic electrical generator

    DOE Patents [OSTI]

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

    1986-01-01

    A thermoacoustic magnetohydrodynamic electrical generator includes an intrinsically irreversible thermoacoustic heat engine coupled to a magnetohydrodynamic electrical generator. The heat engine includes an electrically conductive liquid metal as the working fluid and includes two heat exchange and thermoacoustic structure assemblies which drive the liquid in a push-pull arrangement to cause the liquid metal to oscillate at a resonant acoustic frequency on the order of 1,000 Hz. The engine is positioned in the field of a magnet and is oriented such that the liquid metal oscillates in a direction orthogonal to the field of the magnet, whereby an alternating electrical potential is generated in the liquid metal. Low-loss, low-inductance electrical conductors electrically connected to opposite sides of the liquid metal conduct an output signal to a transformer adapted to convert the low-voltage, high-current output signal to a more usable higher voltage, lower current signal.

  18. Spherical neutron generator

    DOE Patents [OSTI]

    Leung, Ka-Ngo

    2006-11-21

    A spherical neutron generator is formed with a small spherical target and a spherical shell RF-driven plasma ion source surrounding the target. A deuterium (or deuterium and tritium) ion plasma is produced by RF excitation in the plasma ion source using an RF antenna. The plasma generation region is a spherical shell between an outer chamber and an inner extraction electrode. A spherical neutron generating target is at the center of the chamber and is biased negatively with respect to the extraction electrode which contains many holes. Ions passing through the holes in the extraction electrode are focused onto the target which produces neutrons by D-D or D-T reactions.

  19. "The gate-keepers in a changing world: integrating microbial diversity and dynamics with global change biology."

    SciTech Connect (OSTI)

    Jessica L.M. Gutknecht and Kathryn M. Docherty

    2011-11-01

    Microorganisms (Bacteria, Archaea and Fungi) are the gate-keepers of many ecosystem-scale biogeochemical cycles. Although there have been measurable changes in ecosystem function due to human activities such as greenhouse gas production, nutrient loading, land-use change, and water consumption, few studies have connected microbial community dynamics with these changes in ecosystem function. Specifically, very little is known about how global changes will induce important functional changes in microbial biodiversity. Even less is known about how microbial functional changes could alter rates of nutrient cycling or whether microbial communities have enough functional redundancy that changes will have little impact on overall process rates. The proposed symposium will provide an overview of this emerging research area, with emphasis on linking the microorganisms directly to important ecological functions under the influence of global change dynamics. The session will include both broad overviews as well as specific case-studies by researchers who examine microbial communities from a variety of taxonomic levels and from various environments. The session will begin broadly, with speakers discussing how microbial communities may inform ecosystem-scale global change studies, and help to make microbial ecological knowledge more tangible for a broad range of ecologists. The session will continue with case studies of microbial community information informing process in global change experiments. Finally, the session will close with speakers discussing how microbial community information might fit into global change models, and what types of information are useful for future studies. We have requested that speakers particularly incorporate their views on what types of microbial data is useful and informative in the context of larger ecosystem processes. We foresee that this session could serve as a focal point for global change microbial ecologists to meet and discuss their field at the ESA 2010 General Meeting. However, more importantly, the session will provide for a broad range of interests for ecosystem ecologists, theoretical ecologists, and global change biologists, and will foster communication between these groups to generate informative microbial community data in the future.

  20. Sidetone generator flowmeter

    DOE Patents [OSTI]

    Fritz, Robert J. (Schenectady, NY)

    1986-01-01

    A flowmeter is provided which uses the sidetones generated in a cavity formed in the wall of a flowpipe or the like in response to fluid flowing past the cavity to provide a measure of the flow velocity of that fluid. The dimensions of the cavity are such as to provide a dominant vibratory frequency which is sensed by a pressure sensor. The flowmeter is adapted for use for a range of frequencies in which the Strouhal number is constant and under these conditions the vibratory frequency is directly related to the flow rate. The tone generator cavity and pressure transducer form a unit which is connected in-line in the flowpipe.

  1. External split field generator

    DOE Patents [OSTI]

    Thundat, Thomas George (Knoxville, TN); Van Neste, Charles W. (Kingston, TN); Vass, Arpad Alexander (Oak Ridge, TN)

    2012-02-21

    A generator includes a coil disposed about a core. A first stationary magnetic field source may be disposed on a first end portion of the core and a second stationary magnetic field source may be disposed on a second end portion of core. The first and second stationary magnetic field sources apply a stationary magnetic field to the coil. An external magnetic field source may be disposed outside the coil to apply a moving magnetic field to the coil. Electrical energy is generated in response to an interaction between the coil, the moving magnetic field, and the stationary magnetic field.

  2. Quantum random number generator

    E-Print Network [OSTI]

    M. Stipcevic; B. Medved Rogina

    2007-01-01

    We report upon a novel principle for realization of a fast nondeterministic random number generator whose randomness relies on intrinsic randomness of the quantum physical processes of photonic emission in semiconductors and subsequent detection by the photoelectric effect. Timing information of detected photons is used to generate binary random digits-bits. The bit extraction method based on restartable clock theoretically eliminates both bias and autocorrelation while reaching efficiency of almost 0.5 bits per random event. A prototype has been built and statistically tested.

  3. The Proton-Driven Rotor of ATP Synthase: Ohmic Conductance (10 fS), and Absence of Voltage Gating

    E-Print Network [OSTI]

    Junge, Wolfgang

    The Proton-Driven Rotor of ATP Synthase: Ohmic Conductance (10 fS), and Absence of Voltage Gating portion of F0F1-ATP synthase, F0, translocates protons by a rotary mechanism. Proton conduction by F0. The current-voltage relationship of F0 was linear from 7 to 70 mV. The current was extremely proton

  4. IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 45, NO. 6, JUNE 1998 1361 Degradation of Thin Tunnel Gate Oxide

    E-Print Network [OSTI]

    Schroder, Dieter K.

    IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 45, NO. 6, JUNE 1998 1361 Degradation of Thin Tunnel. Schroder, Fellow, IEEE Abstract-- The degradation of thin tunnel gate oxide under constant Fowler charge trapping is usually dominant at low QQQinjinjinj followed by negative charge trapping at high

  5. Test Set Reordering Using the Gate Exhaustive Test Metric Kyoung Youn Cho and Edward J. McCluskey

    E-Print Network [OSTI]

    Stanford University

    Test Set Reordering Using the Gate Exhaustive Test Metric Kyoung Youn Cho and Edward J. Mc kycho@crc.stanford.edu Abstract When a test set size is larger than desired, some patterns must be dropped. This paper presents a systematic method to reduce test set size; the method reorders a test set

  6. Tuning the metal-insulator crossover and magnetism in SrRuO3 by ionic gating

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

    Yi, Hee Taek; Gao, Bin; Xie, Wei; Cheong, Sang -Wook; Podzorov, Vitaly

    2014-10-13

    Reversible control of charge transport and magnetic properties without degradation is a key for device applications of transition metal oxides. Chemical doping during the growth of transition metal oxides can result in large changes in physical properties, but in most of the cases irreversibility is an inevitable constraint. We report a reversible control of charge transport, metal-insulator crossover and magnetism in field-effect devices based on ionically gated archetypal oxide system - SrRuO3. In these thin-film devices, the metal-insulator crossover temperature and the onset of magnetoresistance can be continuously and reversibly tuned in the range 90–250 K and 70–100 K, respectively,more »by application of a small gate voltage. We infer that a reversible diffusion of oxygen ions in the oxide lattice dominates the response of these materials to the gate electric field. These findings provide critical insights into both the understanding of ionically gated oxides and the development of novel applications.« less

  7. Tuning the metal-insulator crossover and magnetism in SrRuO3 by ionic gating

    SciTech Connect (OSTI)

    Yi, Hee Taek; Gao, Bin; Xie, Wei; Cheong, Sang -Wook; Podzorov, Vitaly

    2014-10-13

    Reversible control of charge transport and magnetic properties without degradation is a key for device applications of transition metal oxides. Chemical doping during the growth of transition metal oxides can result in large changes in physical properties, but in most of the cases irreversibility is an inevitable constraint. We report a reversible control of charge transport, metal-insulator crossover and magnetism in field-effect devices based on ionically gated archetypal oxide system - SrRuO3. In these thin-film devices, the metal-insulator crossover temperature and the onset of magnetoresistance can be continuously and reversibly tuned in the range 90–250 K and 70–100 K, respectively, by application of a small gate voltage. We infer that a reversible diffusion of oxygen ions in the oxide lattice dominates the response of these materials to the gate electric field. These findings provide critical insights into both the understanding of ionically gated oxides and the development of novel applications.

  8. Molecular Physics, Vol. 104, No. 8, 20 April 2006, 12491266 Quantum logic gates in iodine vapor using timefrequency

    E-Print Network [OSTI]

    Apkarian, V. Ara

    ) We present a numerical investigation of the implementation of quantum logic gates through time. Possible experimental constraints are investigated, including the necessary precision in the timing the implementation of a sequence of quantum operations. The results of our simulations suggest that TFRCARS

  9. Digital pulse shape analysis for the capture-gated liquid scintillator BC-523A Marek Flaska , Sara A. Pozzi

    E-Print Network [OSTI]

    Eustice, Ryan

    A. Pozzi Department of Nuclear Engineering & Radiological Sciences, University of Michigan, 1906: Capture-gated detector Liquid scintillator Neutron spectroscopy Special nuclear material a b s t r a c and reasonable agreement is achieved. This work has applications in fields such as nuclear safeguards, nuclear

  10. IEEE ELECTRON DEVICE LETTERS, VOL. 29, NO. 2, FEBRUARY 2008 183 Externally Assembled Gate-All-Around Carbon

    E-Print Network [OSTI]

    IEEE ELECTRON DEVICE LETTERS, VOL. 29, NO. 2, FEBRUARY 2008 183 Externally Assembled Gate-All-Around Carbon Nanotube Field-Effect Transistor Zhihong Chen, Member, IEEE, Damon Farmer, Sheng Xu, Roy Gordon, Phaedon Avouris, Member, IEEE, and Joerg Appenzeller, Senior Member, IEEE Abstract--In this letter, we

  11. Dirac point and transconductance of top-gated graphene field-effect transistors operating at elevated temperature

    SciTech Connect (OSTI)

    Hopf, T.; Vassilevski, K. V., E-mail: k.vasilevskiy@ncl.ac.uk; Escobedo-Cousin, E.; King, P. J.; Wright, N. G.; O'Neill, A. G.; Horsfall, A. B.; Goss, J. P. [School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU (United Kingdom); Wells, G. H.; Hunt, M. R. C. [Department of Physics, Durham University, Durham DH1 3LE (United Kingdom)

    2014-10-21

    Top-gated graphene field-effect transistors (GFETs) have been fabricated using bilayer epitaxial graphene grown on the Si-face of 4H-SiC substrates by thermal decomposition of silicon carbide in high vacuum. Graphene films were characterized by Raman spectroscopy, Atomic Force Microscopy, Scanning Tunnelling Microscopy, and Hall measurements to estimate graphene thickness, morphology, and charge transport properties. A 27?nm thick Al?O? gate dielectric was grown by atomic layer deposition with an e-beam evaporated Al seed layer. Electrical characterization of the GFETs has been performed at operating temperatures up to 100?°C limited by deterioration of the gate dielectric performance at higher temperatures. Devices displayed stable operation with the gate oxide dielectric strength exceeding 4.5 MV/cm at 100?°C. Significant shifting of the charge neutrality point and an increase of the peak transconductance were observed in the GFETs as the operating temperature was elevated from room temperature to 100?°C.

  12. Coupled electromechanical effects in wurtzite quantum dots with wetting layers in gate controlled electric fields: The multiband case

    E-Print Network [OSTI]

    Melnik, Roderick

    Coupled electromechanical effects in wurtzite quantum dots with wetting layers in gate controlled quantifies the electromechanical effects on the band structure of wurtzite quantum dots. c Systematic study online 25 September 2012 a b s t r a c t We quantify the influence of coupled electromechanical effects

  13. Role of hydrogen in Ge/HfO2/Al gate stacks subjected to negative bias temperature instability

    E-Print Network [OSTI]

    Misra, Durgamadhab "Durga"

    Role of hydrogen in Ge/HfO2/Al gate stacks subjected to negative bias temperature instability N 2007; published online 17 January 2008 This work investigates the role of hydrogen and nitrogen in a Ge. Virtually unchanged interface state density as a function of NBTI indicates no atomic hydrogen release from

  14. Controlling Graphene Ultrafast Hot Carrier Response from Metal-like to Semiconductor-like by Electrostatic Gating

    E-Print Network [OSTI]

    Zettl, Alex

    1 Controlling Graphene Ultrafast Hot Carrier Response from Metal-like to Semiconductor electro-optic sampling.2 The focused THz beam at our graphene sample has a diameter of 1 mm. For optical between optical pump and THz probe. We use ion-gel gating to control the carrier concentration in graphene

  15. Efficient Modulation of 1.55 m Radiation with Gated Graphene on a Silicon Micro-ring Resonator

    E-Print Network [OSTI]

    Natelson, Douglas

    with complementary metal-oxide-semiconductor technology. #12;(TOC) Keywords: graphene photonics, NIR modulatorEfficient Modulation of 1.55 µm Radiation with Gated Graphene on a Silicon Micro-ring Resonator-edge onset of interband absorption in graphene can be utilized to modulate near-infrared radiation

  16. High-performance pentacene field-effect transistors using Al2O3 gate dielectrics prepared by atomic

    E-Print Network [OSTI]

    Wang, Zhong L.

    fabricated using Al2O3 as a gate dielectric material grown by atomic layer deposition (ALD). Hole mobility is also desirable to allow for fabri- cation on plastic substrates. Atomic layer deposition (ALD layer deposition (ALD) Xiao-Hong Zhang a , Benoit Domercq a , Xudong Wang b , Seunghyup Yoo a , Takeshi

  17. International Conference on Internet Computing. Las Vegas, Nevada, p. 620 626. 23 26 June MONSTERS AT THE GATE

    E-Print Network [OSTI]

    Jansen, James

    , (2) Web agents are searching for a wide variety of information, with 60% of the terms used being: terms exactly as entered by the given user. Data Analysis With these three fields, we located initial June 2003. MONSTERS AT THE GATE: WHEN SOFTBOTS VISIT WEB SEARCH ENGINES Bernard J. Jansen and Amanda S

  18. Graduate Automotive Technology Education (GATE) Program: Center of Automotive Technology Excellence in Advanced Hybrid Vehicle Technology at West Virginia University

    SciTech Connect (OSTI)

    Nigle N. Clark

    2006-12-31

    This report summarizes the technical and educational achievements of the Graduate Automotive Technology Education (GATE) Center at West Virginia University (WVU), which was created to emphasize Advanced Hybrid Vehicle Technology. The Center has supported the graduate studies of 17 students in the Department of Mechanical and Aerospace Engineering and the Lane Department of Computer Science and Electrical Engineering. These students have addressed topics such as hybrid modeling, construction of a hybrid sport utility vehicle (in conjunction with the FutureTruck program), a MEMS-based sensor, on-board data acquisition for hybrid design optimization, linear engine design and engine emissions. Courses have been developed in Hybrid Vehicle Design, Mobile Source Powerplants, Advanced Vehicle Propulsion, Power Electronics for Automotive Applications and Sensors for Automotive Applications, and have been responsible for 396 hours of graduate student coursework. The GATE program also enhanced the WVU participation in the U.S. Department of Energy Student Design Competitions, in particular FutureTruck and Challenge X. The GATE support for hybrid vehicle technology enhanced understanding of hybrid vehicle design and testing at WVU and encouraged the development of a research agenda in heavy-duty hybrid vehicles. As a result, WVU has now completed three programs in hybrid transit bus emissions characterization, and WVU faculty are leading the Transportation Research Board effort to define life cycle costs for hybrid transit buses. Research and enrollment records show that approximately 100 graduate students have benefited substantially from the hybrid vehicle GATE program at WVU.

  19. An Exact Gate Decomposition Algorithm for LowPower Technology Mapping Hai Zhou and D.F. Wong

    E-Print Network [OSTI]

    Zhou, Hai

    properties, we design an efficient exact algorithm to solve the low­power gate decomposition problem. More designs. Power dissipation in digital CMOS circuits is dominated by the dynamic dissipation, which, but CL and E sw can be controlled in design process. In technology mapping, the subject netlist

  20. Options for Generating Steam Efficiently 

    E-Print Network [OSTI]

    Ganapathy, V.

    1996-01-01

    This paper describes how plant engineers can efficiently generate steam when there are steam generators and Heat Recovery Steam Generators in their plant. The process consists of understanding the performance characteristics of the various equipment...

  1. The Generation Effect and Memory

    E-Print Network [OSTI]

    Rosner, Zachary Alexander

    2012-01-01

    M. A. (2007). The generation effect: A meta- analyticBjork, R. A. (1988). The generation effect: Support for aE. J. (2012). The next generation: The value of reminding.

  2. A Parallelized Hash Generator System

    E-Print Network [OSTI]

    EDA385 A Parallelized Hash Generator System Niklas Ald´en ael10nal@student.lu.se Gabriel J cracker uses the MD5 hash function to generate a hash from a random generated character sequence

  3. Code Generation on Steroids: Enhancing COTS Code Generators via Generative Aspects

    E-Print Network [OSTI]

    Ryder, Barbara G.

    Code Generation on Steroids: Enhancing COTS Code Generators via Generative Aspects Cody Henthorne tilevich@cs.vt.edu Abstract Commercial of-the-shelf (COTS) code generators have become an integral part of modern commercial software development. Programmers use code generators to facilitate many tedious

  4. Fourth generation bound states

    SciTech Connect (OSTI)

    Ishiwata, Koji; Wise, Mark B. [California Institute of Technology, Pasadena, California, 91125 (United States)

    2011-04-01

    We investigate the spectrum and wave functions of q{sup '}q{sup '} bound states for heavy fourth generation quarks (q{sup '}) that have a very small mixing with the three observed generations of standard model quarks. Such bound states come with different color, spin and flavor quantum numbers. Since the fourth generation Yukawa coupling, {lambda}{sub q}{sup '}, is large we include all perturbative corrections to the potential between the heavy quark and antiquark of order {lambda}{sub q}{sup '2}N{sub c}/16{pi}{sup 2} where N{sub c} is the number of colors, as well as relativistic corrections suppressed by (v/c){sup 2}. We find that the lightest fourth generation quark masses for which a bound state exists for color octet states. For the color singlet states, which always have a bound state, we analyze the influence that the Higgs couplings have on the size and binding energy of the bound states.

  5. GENERATIVE AND DISCRIMINATIVE CLASSIFIERS

    E-Print Network [OSTI]

    Baltes, Jacky

    CHAPTER 1 GENERATIVE AND DISCRIMINATIVE CLASSIFIERS: NAIVE BAYES AND LOGISTIC REGRESSION Machine, or equivalently P(Y|X). To begin, we will assume Y is a boolean-valued random variable, and X is a vector) where ym represents the mth possible value for Y, and where the summation in the denominator is over all

  6. GENERATIVE AND DISCRIMINATIVE CLASSIFIERS

    E-Print Network [OSTI]

    Mitchell, Tom

    CHAPTER 3 GENERATIVE AND DISCRIMINATIVE CLASSIFIERS: NAIVE BAYES AND LOGISTIC REGRESSION Machine, or equivalently P(Y|X). To begin, we will assume Y is a boolean-valued random variable, and X is a vector. Mitchell. 2 where ym denotes the mth possible value for Y, xk denotes the kth possible vector value for X

  7. Generating Resources Advisory Committee

    E-Print Network [OSTI]

    Generating Resources Advisory Committee May 28, 2014 Steve Simmons Gillian Charles #12;2 9:30 AM plants 10:45 AM Break 11:00 AM Peaking Technologies Continued... 11:30 AM Combined Cycle Combustion Turbine and Utility Scale Solar PV Reference plant updates Levelized cost of energy 12:00 PM Lunch

  8. Generating Resources Advisory Committee

    E-Print Network [OSTI]

    Generating Resources Advisory Committee February 27, 2014 Steven Simmons and Gillian Charles Upcoming Symposium 9:15 am Natural Gas Peaking Technologies Technology Trends Proposed reference plant Costing, Economies of Scale, Normalizations Reference Plants 12:30 pm Discussion of Next GRAC Meetings

  9. Energy generation in stars

    E-Print Network [OSTI]

    B. V. Vasiliev

    2001-10-29

    It is a current opinion that thermonuclear fusion is the main source of the star activity. It is shown below that this source is not unique. There is another electrostatic mechanism of the energy generation which accompanies thermonuclear fusion. Probably, this approach can solve the solar neutrino problem.

  10. Volcanoes generate devastating waves

    SciTech Connect (OSTI)

    Lockridge, P. (National Geophysical Data Center, Boulder, CO (USA))

    1988-01-01

    Although volcanic eruptions can cause many frightening phenomena, it is often the power of the sea that causes many volcano-related deaths. This destruction comes from tsunamis (huge volcano-generated waves). Roughly one-fourth of the deaths occurring during volcanic eruptions have been the result of tsunamis. Moreover, a tsunami can transmit the volcano's energy to areas well outside the reach of the eruption itself. Some historic records are reviewed. Refined historical data are increasingly useful in predicting future events. The U.S. National Geophysical Data Center/World Data Center A for Solid Earth Geophysics has developed data bases to further tsunami research. These sets of data include marigrams (tide gage records), a wave-damage slide set, digital source data, descriptive material, and a tsunami wall map. A digital file contains information on methods of tsunami generation, location, and magnitude of generating earthquakes, tsunami size, event validity, and references. The data can be used to describe areas mot likely to generate tsunamis and the locations along shores that experience amplified effects from tsunamis.

  11. Iridium 191-m generator

    DOE Patents [OSTI]

    Treves, S.; Cheng, C.C.

    1988-03-08

    Potassium osmate, of the formula K[sub 2]OsO[sub 2](OH)[sub 4], is used to make a column for the generation of Ir-191 m, which is used in first pass angiography to detect cardiac defects in patients. 2 figs.

  12. Optical gating and streaking of free-electrons with attosecond precision

    E-Print Network [OSTI]

    Kozak, Martin; Leedle, Kenneth J; Schoenenberger, Norbert; Ruehl, Alex; Hartl, Ingmar; Harris, James S; Byer, Robert L; Hommelhoff, Peter

    2015-01-01

    In this paper we present proof of principle experiments of an optical gating concept for free electrons. We demonstrate a temporal resolution of 1.2+-0.3 fs via energy and transverse momentum modulation as a function of time. The scheme is based on the synchronous interaction between electrons and the near-field mode of a dielectric nano-grating excited by a femtosecond laser pulse with an optical period duration of 6.5 fs. The sub-optical cycle resolution demonstrated here is promising for use in laser-driven streak cameras for attosecond temporal characterization of bunched particle beams as well as time-resolved experiments with free-electron beams. We expect that 10 as temporal resolution will be achieved in the near future using such a scheme.

  13. A New Gated X-Ray Detector for the Orion Laser Facility

    SciTech Connect (OSTI)

    Clark, David D.; Aragonez, Robert J.; Archuleta, Thomas N.; Fatherley, Valerie E.; Hsu, Albert H.; Jorgenson, H. J.; Mares, Danielle; Oertel, John A.; Oades, Kevin; Kemshall, Paul; Thomas, Philip; Young, Trevor; Pederson, Neal

    2012-08-08

    Gated X-Ray Detectors (GXD) are considered the work-horse target diagnostic of the laser based inertial confinement fusion (ICF) program. Recently, Los Alamos National Laboratory (LANL) has constructed three new GXDs for the Orion laser facility at the Atomic Weapons Establishment (AWE) in the United Kingdom. What sets these three new instruments apart from the what has previously been constructed for the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) is: improvements in detector head microwave transmission lines, solid state embedded hard drive and updated control software, and lighter air box design and other incremental mechanical improvements. In this paper we will present the latest GXD design enhancements and sample calibration data taken on the Trident laser facility at Los Alamos National Laboratory using the newly constructed instruments.

  14. Ionizing radiation induced leakage current on ultra-thin gate oxides

    SciTech Connect (OSTI)

    Scarpa, A.; Paccagnella, A.; Montera, F.; Ghibaudo, G.; Pananakakis, G.; Fuochi, P.G.

    1997-12-01

    MOS capacitors with a 4.4 nm thick gate oxide have been exposed to {gamma} radiation from a Co{sup 60} source. As a result, the authors have measured a stable leakage current at fields lower than those required for Fowler-Nordheim tunneling. This Radiation Induced Leakage Current (RILC) is similar to the usual Stress Induced Leakage Currents (SILC) observed after electrical stresses of MOS devices. They have verified that these two currents share the same dependence on the oxide field, and the RILC contribution can be normalized to an equivalent injected charge for Constant Current Stresses. They have also considered the dependence of the RILC from the cumulative radiation dose, and from the applied bias during irradiation, suggesting a correlation between RILC and the distribution of trapped holes and neutral levels in the oxide layer.

  15. Magnetoelectric effects and valley-controlled spin quantum gates in transition metal dichalcogenide bilayers

    SciTech Connect (OSTI)

    Gong, Zhirui; Liu, G. B.; Yu, Hongyi; Xiao, Di; Cui, Xiaodong; Xu, Xiaodong; Yao, Wang

    2013-01-01

    In monolayer group-VI transition metal dichalcogenides, charge carriers have spin and valley degrees of freedom, both associated with magnetic moments. On the other hand, the layer degree of freedom in multilayers is associated with electrical polarization. Here we show that transition metal dichalcogenide bilayers offer an unprecedented platform to realize a strong coupling between the spin, valley and layer pseudospin of holes. Such coupling gives rise to the spin Hall effect and spin-dependent selection rule for optical transitions in inversion symmetric bilayer and leads to a variety of magnetoelectric effects permitting quantum manipulation of these electronic degrees of freedom. Oscillating electric and magnetic fields can both drive the hole spin resonance where the two fields have valley-dependent interference, making an interplay between the spin and valley as information carriers possible for potential valley-spintronic applications. We show how to realize quantum gates on the spin qubit controlled by the valley bit.

  16. Cooperative Gating and Spatial Organization of Membrane Proteins through Elastic Interactions

    E-Print Network [OSTI]

    Tristan Ursell; Kerwyn Huang; Eric Peterson; Rob Phillips

    2007-02-14

    Biological membranes are elastic media in which the presence of a transmembrane protein leads to local bilayer deformation. The energetics of deformation allow two membrane proteins in close proximity to influence each other's equilibrium conformation via their local deformations, and spatially organize the proteins based on their geometry. We use the mechanosensitive channel of large conductance (MscL) as a case study to examine the implications of bilayer-mediated elastic interactions on protein conformational statistics and clustering. The deformations around MscL cost energy on the order of 10 kT and extend ~3nm from the protein edge, as such elastic forces induce cooperative gating and we propose experiments to measure these effects. Additionally, since elastic interactions are coupled to protein conformation, we find that conformational changes can severely alter the average separation between two proteins. This has important implications for how conformational changes organize membrane proteins into functional groups within membranes.

  17. Revealing Carrier-Envelope Phase through Frequency Mixing and Interference in Frequency Resolved Optical Gating

    E-Print Network [OSTI]

    Snedden, Edward W; Jamison, Steven P

    2015-01-01

    We demonstrate that full temporal characterisation of few-cycle electromagnetic pulses, including retrieval of the carrier envelope phase (CEP), can be directly obtained from Frequency Resolved Optical Gating (FROG) techniques in which the interference between non-linear frequency mixing processes is resolved. We derive a framework for this scheme, defined Real Domain-FROG (ReD-FROG), as applied to the cases of interference between sum and difference frequency components and between fundamental and sum/difference frequency components. A successful numerical demonstration of ReD-FROG as applied to the case of a self-referenced measurement is provided. A proof-of-principle experiment is performed in which the CEP of a single-cycle THz pulse is accurately obtained and demonstrates the possibility for THz detection beyond the bandwidth limitations of electro-optic sampling.

  18. A Strained Organic Field-Effect-Transistor with a Gate-Tunable Superconducting Channel

    E-Print Network [OSTI]

    Hiroshi M. Yamamoto; Masaki Nakano; Masayuki Suda; Yoshihiro Iwasa; Masashi Kawasaki; Reizo Kato

    2013-09-02

    In state-of-the-art silicon devices, mobility of the carrier is enhanced by the lattice strain from the back substrate. Such an extra control of device performance is significant in realizing high performance computing and should be valid for electric-field-induced superconducting devices, too. However, so far, the carrier density is the sole parameter for field-induced superconducting interfaces. Here we show an active organic superconducting field-effect-transistor whose lattice is modulated by the strain from the substrate. The soft organic lattice allows tuning of the strain by a choice of the back substrate to make an induced superconducting state accessible at low temperature with a paraelectric solid gate. An active three terminal Josephson junction device thus realized is useful both in advanced computing and in elucidating a direct connection between filling-controlled and bandwidth-controlled superconducting phases in correlated materials.

  19. GENERATION AND RANDOM GENERATION: FROM SIMPLE GROUPS TO MAXIMAL SUBGROUPS

    E-Print Network [OSTI]

    Burness, Tim

    GENERATION AND RANDOM GENERATION: FROM SIMPLE GROUPS TO MAXIMAL SUBGROUPS TIMOTHY C. BURNESS of generators for G. It is well known that d(G) = 2 for all (non-abelian) finite simple groups. We prove that d investigate the random generation of maximal subgroups of simple and almost simple groups. By applying

  20. SACCADE GENERATOR AND SACCADE RESET 7.1. Saccade Generator

    E-Print Network [OSTI]

    Grossberg, Stephen

    CHAPTER 7 SACCADE GENERATOR AND SACCADE RESET 7.1. Saccade Generator In Section 2.5, we described learning requirements that suggest the need for a saccade generator (SG). An SG must be capable of shutting, moreover, change as a systematic function of SG input, not only to generate sa.:cades in response

  1. Engineering a Simple, Efficient Code-Generator Generator

    E-Print Network [OSTI]

    Fraser, Christopher W.

    Engineering a Simple, Efficient Code-Generator Generator CHRISTOPHER W, FRASER AT& TBell Laboratories DAVID R. HANSON Princeton University and TODD A. PROEBSTING The University of Arizona Many code-generator generators use tree pattern matching and dynamic programming. This paper describes a simple program

  2. GASIFICATION FOR DISTRIBUTED GENERATION

    SciTech Connect (OSTI)

    Ronald C. Timpe; Michael D. Mann; Darren D. Schmidt

    2000-05-01

    A recent emphasis in gasification technology development has been directed toward reduced-scale gasifier systems for distributed generation at remote sites. The domestic distributed power generation market over the next decade is expected to be 5-6 gigawatts per year. The global increase is expected at 20 gigawatts over the next decade. The economics of gasification for distributed power generation are significantly improved when fuel transport is minimized. Until recently, gasification technology has been synonymous with coal conversion. Presently, however, interest centers on providing clean-burning fuel to remote sites that are not necessarily near coal supplies but have sufficient alternative carbonaceous material to feed a small gasifier. Gasifiers up to 50 MW are of current interest, with emphasis on those of 5-MW generating capacity. Internal combustion engines offer a more robust system for utilizing the fuel gas, while fuel cells and microturbines offer higher electric conversion efficiencies. The initial focus of this multiyear effort was on internal combustion engines and microturbines as more realistic near-term options for distributed generation. In this project, we studied emerging gasification technologies that can provide gas from regionally available feedstock as fuel to power generators under 30 MW in a distributed generation setting. Larger-scale gasification, primarily coal-fed, has been used commercially for more than 50 years to produce clean synthesis gas for the refining, chemical, and power industries. Commercial-scale gasification activities are under way at 113 sites in 22 countries in North and South America, Europe, Asia, Africa, and Australia, according to the Gasification Technologies Council. Gasification studies were carried out on alfalfa, black liquor (a high-sodium waste from the pulp industry), cow manure, and willow on the laboratory scale and on alfalfa, black liquor, and willow on the bench scale. Initial parametric tests evaluated through reactivity and product composition were carried out on thermogravimetric analysis (TGA) equipment. These tests were evaluated and then followed by bench-scale studies at 1123 K using an integrated bench-scale fluidized-bed gasifier (IBG) which can be operated in the semicontinuous batch mode. Products from tests were solid (ash), liquid (tar), and gas. Tar was separated on an open chromatographic column. Analysis of the gas product was carried out using on-line Fourier transform infrared spectroscopy (FT-IR). For selected tests, gas was collected periodically and analyzed using a refinery gas analyzer GC (gas chromatograph). The solid product was not extensively analyzed. This report is a part of a search into emerging gasification technologies that can provide power under 30 MW in a distributed generation setting. Larger-scale gasification has been used commercially for more than 50 years to produce clean synthesis gas for the refining, chemical, and power industries, and it is probable that scaled-down applications for use in remote areas will become viable. The appendix to this report contains a list, description, and sources of currently available gasification technologies that could be or are being commercially applied for distributed generation. This list was gathered from current sources and provides information about the supplier, the relative size range, and the status of the technology.

  3. Thermoacoustic magnetohydrodynamic electrical generator

    SciTech Connect (OSTI)

    Wheatley, J.C.; Swift, G.W.; Migliori, A.

    1986-07-08

    A thermoacoustic magnetohydrodynamic electrical generator is described comprising a magnet having a magnetic field, an elongate hollow housing containing an electrically conductive liquid and a thermoacoustic structure positioned in the liquid, heat exchange means thermally connected to the thermoacoustic structure for inducing the liquid to oscillate at an acoustic resonant frequency within the housing. The housing is positioned in the magnetic field and oriented such that the direction of the magnetic field and the direction of oscillatory motion of the liquid are substantially orthogonal to one another, first and second electrical conductor means connected to the liquid on opposite sides of the housing along an axis which is substantially orthogonal to both the direction of the magnetic field and the direction of oscillatory motion of the liquid, an alternating current output signal is generated in the conductor means at a frequency corresponding to the frequency of the oscillatory motion of the liquid.

  4. Calibrated vapor generator source

    DOE Patents [OSTI]

    Davies, J.P.; Larson, R.A.; Goodrich, L.D.; Hall, H.J.; Stoddard, B.D.; Davis, S.G.; Kaser, T.G.; Conrad, F.J.

    1995-09-26

    A portable vapor generator is disclosed that can provide a controlled source of chemical vapors, such as, narcotic or explosive vapors. This source can be used to test and calibrate various types of vapor detection systems by providing a known amount of vapors to the system. The vapor generator is calibrated using a reference ion mobility spectrometer. A method of providing this vapor is described, as follows: explosive or narcotic is deposited on quartz wool, placed in a chamber that can be heated or cooled (depending on the vapor pressure of the material) to control the concentration of vapors in the reservoir. A controlled flow of air is pulsed over the quartz wool releasing a preset quantity of vapors at the outlet. 10 figs.

  5. Calibrated vapor generator source

    DOE Patents [OSTI]

    Davies, John P. (Idaho Falls, ID); Larson, Ronald A. (Idaho Falls, ID); Goodrich, Lorenzo D. (Shelley, ID); Hall, Harold J. (Idaho Falls, ID); Stoddard, Billy D. (Idaho Falls, ID); Davis, Sean G. (Idaho Falls, ID); Kaser, Timothy G. (Idaho Falls, ID); Conrad, Frank J. (Albuquerque, NM)

    1995-01-01

    A portable vapor generator is disclosed that can provide a controlled source of chemical vapors, such as, narcotic or explosive vapors. This source can be used to test and calibrate various types of vapor detection systems by providing a known amount of vapors to the system. The vapor generator is calibrated using a reference ion mobility spectrometer. A method of providing this vapor is described, as follows: explosive or narcotic is deposited on quartz wool, placed in a chamber that can be heated or cooled (depending on the vapor pressure of the material) to control the concentration of vapors in the reservoir. A controlled flow of air is pulsed over the quartz wool releasing a preset quantity of vapors at the outlet.

  6. Using polymer electrolyte gates to set-and-freeze threshold voltage and local potential in nanowire-based devices and thermoelectrics

    E-Print Network [OSTI]

    Sofia Fahlvik Svensson; Adam M. Burke; Damon J. Carrad; Martin Leijnse; Heiner Linke; Adam P. Micolich

    2014-11-11

    We use the strongly temperature-dependent ionic mobility in polymer electrolytes to 'freeze in' specific ionic charge environments around a nanowire using a local wrap-gate geometry. This enables us to set both the threshold voltage for a conventional doped substrate gate and the local disorder potential at temperatures below 200 Kelvin, which we characterize in detail by combining conductance and thermovoltage measurements with modeling. Our results demonstrate that local polymer electrolyte gates are compatible with nanowire thermoelectrics, where they offer the advantage of a very low thermal conductivity, and hold great potential towards setting the optimal operating point for solid-state cooling applications.

  7. Energy Replacement Generation Tax Exemption

    Broader source: Energy.gov [DOE]

    Under the Energy Replacement Generation Tax Exemption, the following facilities are exempt from the replacement tax:

  8. Fuel cell generator energy dissipator

    DOE Patents [OSTI]

    Veyo, Stephen Emery (Murrysville, PA); Dederer, Jeffrey Todd (Valencia, PA); Gordon, John Thomas (Ambridge, PA); Shockling, Larry Anthony (Pittsburgh, PA)

    2000-01-01

    An apparatus and method are disclosed for eliminating the chemical energy of fuel remaining in a fuel cell generator when the electrical power output of the fuel cell generator is terminated. During a generator shut down condition, electrically resistive elements are automatically connected across the fuel cell generator terminals in order to draw current, thereby depleting the fuel

  9. Ion beam generating apparatus

    DOE Patents [OSTI]

    Brown, Ian G. (1088 Woodside Rd., Berkeley, CA 94708); Galvin, James (2 Commodore #276, Emeryville, CA 94608)

    1987-01-01

    An ion generating apparatus utilizing a vacuum chamber, a cathode and an anode in the chamber. A source of electrical power produces an arc or discharge between the cathode and anode. The arc is sufficient to vaporize a portion of the cathode to form a plasma. The plasma is directed to an extractor which separates the electrons from the plasma, and accelerates the ions to produce an ion beam.

  10. Ion beam generating apparatus

    DOE Patents [OSTI]

    Brown, I.G.; Galvin, J.

    1987-12-22

    An ion generating apparatus utilizing a vacuum chamber, a cathode and an anode in the chamber. A source of electrical power produces an arc or discharge between the cathode and anode. The arc is sufficient to vaporize a portion of the cathode to form a plasma. The plasma is directed to an extractor which separates the electrons from the plasma, and accelerates the ions to produce an ion beam. 10 figs.

  11. Negative ion generator

    DOE Patents [OSTI]

    Stinnett, R.W.

    1984-05-08

    A negative ion generator is formed from a magnetically insulated transmission line having a coating of graphite on the cathode for producing negative ions and a plurality of apertures on the opposed anode for the release of negative ions. Magnetic insulation keeps electrons from flowing from the cathode to the anode. A transverse magnetic field removes electrons which do escape through the apertures from the trajectory of the negative ions. 8 figs.

  12. Optical harmonic generator

    DOE Patents [OSTI]

    Summers, Mark A. (Livermore, CA); Eimerl, David (Pleasanton, CA); Boyd, Robert D. (Livermore, CA)

    1985-01-01

    A pair of uniaxial birefringent crystal elements are fixed together to form a serially arranged, integral assembly which, alternatively, provides either a linearly or elliptically polarized second-harmonic output wave or a linearly polarized third-harmonic output wave. The "extraordinary" or "e" directions of the crystal elements are oriented in the integral assembly to be in quadrature (90.degree.). For a second-harmonic generation in the Type-II-Type-II angle tuned case, the input fundamental wave has equal amplitude "o" and "e" components. For a third-harmonic generation, the input fundamental wave has "o" and "e" components whose amplitudes are in a ratio of 2:1 ("o":"e" reference first crystal). In the typical case of a linearly polarized input fundamental wave this can be accomplished by simply rotating the crystal assembly about the input beam direction by 10.degree.. For both second and third harmonic generation input precise phase-matching is achieved by tilting the crystal assembly about its two sensitive axes ("o").

  13. Optical harmonic generator

    DOE Patents [OSTI]

    Summers, M.A.; Eimerl, D.; Boyd, R.D.

    1982-06-10

    A pair of uniaxial birefringent crystal elements are fixed together to form a serially arranged, integral assembly which, alternatively, provides either a linearly or elliptically polarized second-harmonic output wave or a linearly polarized third-harmonic output wave. The extraordinary or e directions of the crystal elements are oriented in the integral assembly to be in quadrature (90/sup 0/). For a second-harmonic generation in the Type-II-Type-II angle tuned case, the input fundamental wave has equal amplitude o and e components. For a third-harmonic generation, the input fundamental wave has o and e components whose amplitudes are in a ratio of 2:1 (o:e reference first crystal). In the typical case of a linearly polarized input fundamental wave this can be accomplished by simply rotating the crystal assembly about the input beam direction by 10/sup 0/. For both second and third harmonic generation input precise phase-matching is achieved by tilting the crystal assembly about its two sensitive axeses (o).

  14. On-demand generation of aqueous two-phase microdroplets with reversible phase transitions

    SciTech Connect (OSTI)

    Boreyko, Jonathan B [ORNL; Mruetusatorn, Prachya [ORNL; Retterer, Scott T [ORNL; Collier, Pat [ORNL

    2013-01-01

    Aqueous two-phase systems contained entirely within microdroplets enable a bottom-up approach to mimicking the dynamic microcompartmentation of biomaterial that naturally occurs within the cytoplasm of cells. Here, we demonstrate the on-demand generation of femtolitre aqueous two-phase droplets within a microfluidic oil channel. Gated pressure pulses were used to generate individual, stationary two-phase microdroplets with a well-defined time zero for carrying out controlled and sequential phase transformations over time. Reversible phase transitions between single-phase, two-phase, and core-shell microgel states were obtained via evaporation-induced dehydration and on-demand water rehydration. In contrast to other microfluidic aqueous two-phase droplets, which require continuous flows and high-frequency droplet formation, our system enables the controlled isolation and reversible transformation of a single microdroplet and is expected to be useful for future studies in dynamic microcompartmentation and affinity partitioning.

  15. Development of a super high speed motor-generator and controller

    SciTech Connect (OSTI)

    Hong, Do-Kwan Ahn, Min-Hyuk; Joo, Dae-Suk; Woo, Byung-Chul; Koo, Dae-Hyun

    2014-05-07

    To develop a super high speed motor-generator, it is essential to deal with magnetic analysis, dynamic analysis, and experimental evaluation of the heart of the MTG (Microturbine Generator) system, the motor-generator. An amorphous core is applied to a stator core for reduction of iron loss at high speed, and the motor-generator is analyzed with considerations focused on magnetic losses and the statistical optimum design. The performance of the amorphous core is validated by the analysis and experiment by back-to-back tests considering the AC load. Rotor dynamics is performed for dynamic stability at high speed using transient analysis orbit diagrams and compared with the experimental results. The simulation results of the generator are compared with the experiment. Also a super high speed controller of the MTG system is developed using a sensorless algorithm, power stack, gate driver, digital signal processing, analog circuit, and radiation heat design. Based on these results, a high speed motor-generator and controller are successfully developed.

  16. Linguistic Alignment in Natural Language Generation

    E-Print Network [OSTI]

    Halberg, Gabrielle Manya

    2013-01-01

    that are instantiated at generation time. . . . . . . . .that are instantiated at generation time. . Illustration ofin Natural Language Generation by Gabrielle Halberg

  17. Hermetic turbine generator

    DOE Patents [OSTI]

    Meacher, John S. (Ballston Lake, NY); Ruscitto, David E. (Ballston Spa, NY)

    1982-01-01

    A Rankine cycle turbine drives an electric generator and a feed pump, all on a single shaft, and all enclosed within a hermetically sealed case. The shaft is vertically oriented with the turbine exhaust directed downward and the shaft is supported on hydrodynamic fluid film bearings using the process fluid as lubricant and coolant. The selection of process fluid, type of turbine, operating speed, system power rating, and cycle state points are uniquely coordinated to achieve high turbine efficiency at the temperature levels imposed by the recovery of waste heat from the more prevalent industrial processes.

  18. Spin Seebeck power generators

    SciTech Connect (OSTI)

    Cahaya, Adam B.; Tretiakov, O. A. [Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan); Bauer, Gerrit E. W. [Institute for Materials Research and WPI-AIMR, Tohoku University, Sendai 980-8577 (Japan); Kavli Institute of NanoScience, TU Delft Lorentzweg 1, 2628 CJ Delft (Netherlands)

    2014-01-27

    We derive expressions for the efficiency and figure of merit of two spin caloritronic devices based on the spin Seebeck effect (SSE), i.e., the generation of spin currents by a temperature gradient. The inverse spin Hall effect is conventionally used to detect the SSE and offers advantages for large area applications. We also propose a device that converts spin current into electric one by means of a spin-valve detector, which scales favorably to small sizes and approaches a figure of merit of 0.5 at room temperature.

  19. Computer generated holographic microtags

    DOE Patents [OSTI]

    Sweatt, W.C.

    1998-03-17

    A microlithographic tag comprising an array of individual computer generated holographic patches having feature sizes between 250 and 75 nanometers is disclosed. The tag is a composite hologram made up of the individual holographic patches and contains identifying information when read out with a laser of the proper wavelength and at the proper angles of probing and reading. The patches are fabricated in a steep angle Littrow readout geometry to maximize returns in the -1 diffracted order. The tags are useful as anti-counterfeiting markers because of the extreme difficulty in reproducing them. 5 figs.

  20. Vehicle Technologies Office Merit Review 2014: GATE Center of Excellence at UAB for Lightweight Materials and Manufacturing for Automotive, Truck and Mass Transit

    Broader source: Energy.gov [DOE]

    Presentation given by University of Alabama at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about GATE Center of...

  1. Vehicle Technologies Office Merit Review 2014: GATE Center of Excellence at UAB for Lightweight Materials and Manufacturing for Automotive, Truck and Mass Transit

    Office of Energy Efficiency and Renewable Energy (EERE)

    Presentation given by University of Alabama at Birmingham at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about GATE...

  2. Vehicle Technologies Office Merit Review 2015: GATE Center of Excellence at UAB for Lightweight Materials and Manufacturing for Automotive, Truck and Mass Transit

    Broader source: Energy.gov [DOE]

    Presentation given by University of Alabama Birmingham at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about GATE Center...

  3. Quantum Mechanical Calculations of Charge Effects on gating the KcsA channel

    SciTech Connect (OSTI)

    Kariev, Alisher M.; Znamenskiy, Vasiliy S.; Green, Michael E.

    2007-02-06

    The research described in this product was performed in part in the Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory. A series of ab initio (density functional) calculations were carried out on side chains of a set of amino acids, plus water, from the (intracellular) gating region of the KcsA K+ channel. Their atomic coordinates, except hydrogen, are known from X-ray structures [D.A. Doyle, J.M. Cabral, R.A. Pfuetzner, A. Kuo, J.M. Gulbis, S.L. Cohen, B.T. Chait, R. MacKinnon, The structure of the potassium channel: molecular basis of K+ conduction and selectivity, Science 280 (1998) 69–77; R. MacKinnon, S.L. Cohen, A. Kuo, A. Lee, B.T. Chait, Structural conservation in prokaryotic and eukaryotic potassium channels, Science 280 (1998) 106–109; Y. Jiang, A. Lee, J. Chen, M. Cadene, B.T. Chait, R. MacKinnon, The open pore conformation of potassium channels. Nature 417 (2001) 523–526], as are the coordinates of some water oxygen atoms. The 1k4c structure is used for the starting coordinates. Quantum mechanical optimization, in spite of the starting configuration, places the atoms in positions much closer to the 1j95, more tightly closed, configuration. This state shows four water molecules forming a “basket” under the Q119 side chains, blocking the channel. When a hydrated K+ approaches this “basket”, the optimized system shows a strong set of hydrogen bonds with the K+ at defined positions, preventing further approach of the K+ to the basket. This optimized structure with hydrated K+ added shows an ice-like 12 molecule nanocrystal of water. If the water molecules exchange, unless they do it as a group, the channel will remain blocked. The “basket” itself appears to be very stable, although it is possible that the K+ with its hydrating water molecules may be more mobile, capable of withdrawing from the gate. It is also not surprising that water essentially freezes, or forms a kind of glue, in a nanometer space; this agrees with experimental results on a rather different, but similarly sized (nm dimensions) system [K.B. Jinesh, J.W.M. Frenken, Capillary condensation in atomic scale friction: how water acts like a glue, Phys. Rev. Lett. 96 (2006) 166103/1–4].

  4. Schottky barrier source-gated ZnO thin film transistors by low temperature atomic layer deposition

    SciTech Connect (OSTI)

    Ma, Alex M.; Gupta, Manisha; Shoute, Gem; Tsui, Ying Y.; Barlage, Douglas W., E-mail: barlage@ualberta.ca [Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G 2V4 (Canada); Afshar, Amir; Cadien, Kenneth C. [Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2V4 (Canada)] [Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2V4 (Canada)

    2013-12-16

    We have fabricated ZnO source-gated thin film transistors (SGTFTs) with a buried TiW source Schottky barrier and a top gate contact. The ZnO active channel and thin high-? HfO{sub 2} dielectric utilized are both grown by atomic layer deposition at temperatures less than 130?°C, and their material and electronic properties are characterized. These SGTFTs demonstrate enhancement-mode operation with a threshold voltage of 0.91?V, electron mobility of 3.9 cm{sup 2} V{sup ?1} s{sup ?1}, and low subthreshold swing of 192?mV/decade. The devices also exhibit a unique combination of high breakdown voltages (>20?V) with low output conductances.

  5. Low-voltage and hysteresis-free organic thin-film transistors employing solution-processed hybrid bilayer gate dielectrics

    SciTech Connect (OSTI)

    Ha, Tae-Jun [Department of Electronic Materials Engineering, Kwangwoon University, Seoul 139-701 (Korea, Republic of)

    2014-07-28

    This study presents a promising approach to realize low-voltage (<3?V) organic thin-film transistors (OTFTs) exhibiting improved electrical and optical stability. Such device performance results from the use of solution-processed hybrid bilayer gate dielectrics consisting of zirconium dioxide (high-k dielectric) and amorphous fluoropolymer, CYTOP{sup ®} (low-k dielectric). Employing a very thin amorphous fluoropolymer film reduces interfacial defect-states by repelling water molecules and other aqueous chemicals from an organic semiconductor active layer due to the hydrophobic surface-property. The chemically clean interface, stemming from decrease in density of trap states improves all the key device properties such as field-effect mobility, threshold voltage, and sub-threshold swing. Furthermore, degradation by electrical bias-stress and photo-induced hysteresis were suppressed in OTFTs employing hybrid bilayer gate dielectrics.

  6. All-metallic electrically gated 2H-TaSe{sub 2} thin-film switches and logic circuits

    SciTech Connect (OSTI)

    Renteria, J.; Jiang, C.; Yan, Z.; Samnakay, R.; Goli, P.; Pope, T. R.; Salguero, T. T.; Wickramaratne, D.; Lake, R. K.; Khitun, A. G.; Balandin, A. A.

    2014-01-21

    We report the fabrication and performance of all-metallic three-terminal devices with tantalum diselenide thin-film conducting channels. For this proof-of-concept demonstration, the layers of 2H-TaSe{sub 2} were exfoliated mechanically from single crystals grown by the chemical vapor transport method. Devices with nanometer-scale thicknesses exhibit strongly non-linear current-voltage characteristics, unusual optical response, and electrical gating at room temperature. We have found that the drain-source current in thin-film 2H-TaSe{sub 2}–Ti/Au devices reproducibly shows an abrupt transition from a highly resistive to a conductive state, with the threshold tunable via the gate voltage. Such current-voltage characteristics can be used, in principle, for implementing radiation-hard all-metallic logic circuits. These results may open new application space for thin films of van der Waals materials.

  7. Palladium nanoparticle decorated silicon nanowire field-effect transistor with side-gates for hydrogen gas detection

    SciTech Connect (OSTI)

    Ahn, Jae-Hyuk; Yun, Jeonghoon; Park, Inkyu; KI for the NanoCentury, KAIST, Daejeon 305-701; Mobile Sensor and IT Convergence Center, KAIST, Daejeon 305-701 ; Choi, Yang-Kyu

    2014-01-06

    A silicon nanowire field-effect transistor (SiNW FET) with local side-gates and Pd surface decoration is demonstrated for hydrogen (H{sub 2}) detection. The SiNW FETs are fabricated by top-down method and functionalized with palladium nanoparticles (PdNPs) through electron beam evaporation for H{sub 2} detection. The drain current of the PdNP-decorated device reversibly responds to H{sub 2} at different concentrations. The local side-gates allow individual addressing of each sensor and enhance the sensitivity by adjusting the working region to the subthreshold regime. A control experiment using a non-functionalized device verifies that the hydrogen-sensitivity is originated from the PdNPs functionalized on the SiNW surface.

  8. Reducing gas generators and methods for generating a reducing gas

    SciTech Connect (OSTI)

    Scotto, Mark Vincent; Perna, Mark Anthony

    2015-11-03

    One embodiment of the present invention is a unique reducing gas generator. Another embodiment is a unique method for generating a reducing gas. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for generating reducing gas. Further embodiments, forms, features, aspects, benefits, and advantages of the present application will become apparent from the description and figures provided herewith.

  9. Evaluation of the irising effect of a slow-gating intensified charge-coupled device on laser-induced incandescence measurements of soot

    SciTech Connect (OSTI)

    Shaddix, Christopher R.; Williams, Timothy C. [Combustion Research Facility, Sandia National Laboratories, 7011 East Avenue, Livermore, California 94550 (United States)

    2009-03-15

    Intensified charge-coupled devices (ICCDs) are used extensively in many scientific and engineering environments to image weak or temporally short optical events. To optimize the quantum efficiency of light collection, many of these devices are chosen to have characteristic intensifier gate times that are relatively slow, on the order of tens of nanoseconds. For many measurements associated with nanosecond laser sources, such as scattering-based diagnostics and most laser-induced fluorescence applications, the signals rise and decay sufficiently fast during and after the laser pulse that the intensifier gate may be set to close after the cessation of the signal and still effectively reject interferences associated with longer time scales. However, the relatively long time scale and complex temporal response of laser-induced incandescence (LII) of nanometer-sized particles (such as soot) offer a difficult challenge to the use of slow-gating ICCDs for quantitative measurements. In this paper, ultraviolet Rayleigh scattering imaging is used to quantify the irising effect of a slow-gating scientific ICCD camera, and an analysis is conducted of LII image data collected with this camera as a function of intensifier gate width. The results demonstrate that relatively prompt LII detection, generally desirable to minimize the influences of particle size and local gas pressure and temperature on measurements of the soot volume fraction, is strongly influenced by the irising effect of slow-gating ICCDs.

  10. A large Bradbury Nielsen ion gate with flexible wire spacing based on photo-etched stainless steel grids and its characterization applying symmetric and asymmetric potentials

    E-Print Network [OSTI]

    T. Brunner; A. R. Mueller; K. O'Sullivan; M. C. Simon; M. Kossick; S. Ettenauer; A. T. Gallant; E. Mané; D. Bishop; M. Good; G. Gratta; J. Dilling

    2011-09-14

    Bradbury Nielsen gates are well known devices used to switch ion beams and are typically applied in mass or mobility spectrometers for separating beam constituents by their different flight or drift times. A Bradbury Nielsen gate consists of two interleaved sets of electrodes. If two voltages of the same amplitude but opposite polarity are applied the gate is closed, and for identical (zero) potential the gate is open. Whereas former realizations of the device employ actual wires resulting in difficulties with winding, fixing and tensioning them, our approach is to use two grids photo-etched from a metallic foil. This design allows for simplified construction of gates covering large beam sizes up to at least 900\\,mm$^2$ with variable wire spacing down to 250\\,\\textmu m. By changing the grids the wire spacing can be varied easily. A gate of this design was installed and systematically tested at TRIUMF's ion trap facility, TITAN, for use with radioactive beams to separate ions with different mass-to-charge ratios by their time-of-flight.

  11. A wide bandgap silicon carbide (SiC) gate driver for high-temperature and high-voltage applications

    SciTech Connect (OSTI)

    Lamichhane, Ranjan [University of Arkansas; Ericson, Milton Nance [ORNL; Frank, Steven Shane [ORNL; BRITTONJr., CHARLES L. [Oak Ridge National Laboratory (ORNL); Marlino, Laura D [ORNL; Mantooth, Alan [University of Arkansas; Francis, Matt [APEI, Inc.; Shepherd, Dr. Paul [University of Arkansas; Glover, Dr. Michael [University of Arkansas; Podar, Mircea [ORNL; Perez, M [University of Arkansas; Mcnutt, Tyler [APEI, Inc.; Whitaker, Mr. Bret [APEI, Inc.; Cole, Mr. Zach [APEI, Inc.

    2014-01-01

    Limitations of silicon (Si) based power electronic devices can be overcome with Silicon Carbide (SiC) because of its remarkable material properties. SiC is a wide bandgap semiconductor material with larger bandgap, lower leakage currents, higher breakdown electric field, and higher thermal conductivity, which promotes higher switching frequencies for high power applications, higher temperature operation, and results in higher power density devices relative to Si [1]. The proposed work is focused on design of a SiC gate driver to drive a SiC power MOSFET, on a Cree SiC process, with rise/fall times (less than 100 ns) suitable for 500 kHz to 1 MHz switching frequency applications. A process optimized gate driver topology design which is significantly different from generic Si circuit design is proposed. The ultimate goal of the project is to integrate this gate driver into a Toyota Prius plug-in hybrid electric vehicle (PHEV) charger module. The application of this high frequency charger will result in lighter, smaller, cheaper, and a more efficient power electronics system.

  12. Steam generator tube rupture study

    E-Print Network [OSTI]

    Free, Scott Thomas

    1986-01-01

    This report describes our investigation of steam generator behavior during a postulated tube rupture accident. Our study was performed using the steam generator, thermal-hydraulic analysis code THERMIT-UTSG. The purpose ...

  13. Evaluation of soft-core processors on a Xilinx Virtex-5 field programmable gate array.

    SciTech Connect (OSTI)

    Learn, Mark Walter

    2011-04-01

    Node-based architecture (NBA) designs for future satellite projects hold the promise of decreasing system development time and costs, size, weight, and power and positioning the laboratory to address other emerging mission opportunities quickly. Reconfigurable field programmable gate array (FPGA)-based modules will comprise the core of several of the NBA nodes. Microprocessing capabilities will be necessary with varying degrees of mission-specific performance requirements on these nodes. To enable the flexibility of these reconfigurable nodes, it is advantageous to incorporate the microprocessor into the FPGA itself, either as a hard-core processor built into the FPGA or as a soft-core processor built out of FPGA elements. This document describes the evaluation of three reconfigurable FPGA-based soft-core processors for use in future NBA systems: the MicroBlaze (uB), the open-source Leon3, and the licensed Leon3. Two standard performance benchmark applications were developed for each processor. The first, Dhrystone, is a fixed-point operation metric. The second, Whetstone, is a floating-point operation metric. Several trials were run at varying code locations, loop counts, processor speeds, and cache configurations. FPGA resource utilization was recorded for each configuration.

  14. Proposal for a graphene-based all-spin logic gate

    SciTech Connect (OSTI)

    Su, Li; Zhao, Weisheng; Zhang, Yue; Querlioz, Damien; Klein, Jacques-Olivier; Dollfus, Philippe; Bournel, Arnaud; Zhang, Youguang

    2015-02-16

    In this work, we present a graphene-based all-spin logic gate (G-ASLG) that integrates the functionalities of perpendicular anisotropy magnetic tunnel junctions (p-MTJs) with spin transport in graphene-channel. It provides an ideal integration of logic and memory. The input and output states are defined as the relative magnetization between free layer and fixed layer of p-MTJs. They can be probed by the tunnel magnetoresistance and controlled by spin transfer torque effect. Using lateral non-local spin valve, the spin information is transmitted by the spin-current interaction through graphene channels. By using a physics-based spin current compact model, the operation of G-ASLG is demonstrated and its performance is analyzed. It allows us to evaluate the influence of parameters, such as spin injection efficiency, spin diffusion length, contact area, the device length, and their interdependence, and to optimize the energy and dynamic performance. Compared to other beyond-CMOS solutions, longer spin information transport length (??m), higher data throughput, faster computing speed (?ns), and lower power consumption (??A) can be expected from the G-ASLG.

  15. Droplet minimizers for the Gates-Lebowitz-Penrose free energy functional

    E-Print Network [OSTI]

    E. A. Carlen; M. C. Carvalho; R. Esposito; J. L. Lebowitz; R. Marra

    2009-05-21

    We study the structure of the constrained minimizers of the Gates-Lebowitz-Penrose free-energy functional ${\\mathcal F}_{\\rm GLP}(m)$, non-local functional of a density field $m(x)$, $x\\in {\\mathcal T}_L$, a $d$-dimensional torus of side length $L$. At low temperatures, ${\\mathcal F}_{\\rm GLP}$ is not convex, and has two distinct global minimizers, corresponding to two equilibrium states. Here we constrain the average density $L^{-d}\\int_{{\\cal T}_L}m(x)\\dd x$ to be a fixed value $n$ between the densities in the two equilibrium states, but close to the low density equilibrium value. In this case, a "droplet" of the high density phase may or may not form in a background of the low density phase, depending on the values $n$ and $L$. We determine the critical density for droplet formation, and the nature of the droplet, as a function of $n$ and $L$. The relation between the free energy and the large deviations functional for a particle model with long-range Kac potentials, proven in some cases, and expected to be true in general, then provides information on the structure of typical microscopic configurations of the Gibbs measure when the range of the Kac potential is large enough.

  16. A novel solution to the gated x-ray detector gain droop problem

    SciTech Connect (OSTI)

    Oertel, J. A. Archuleta, T. N.

    2014-11-15

    Microchannel plate (MCP), microstrip transmission line based, gated x-ray detectors used at the premier ICF laser facilities have a drop in gain as a function of mircostrip length that can be greater than 50% over 40 mm. These losses are due to ohmic losses in a microstrip coating that is less than the optimum electrical skin depth. The electrical skin depth for a copper transmission line at 3 GHz is 1.2 ?m while the standard microstrip coating thickness is roughly half a single skin depth. Simply increasing the copper coating thickness would begin filling the MCP pores and limit the number of secondary electrons created in the MCP. The current coating thickness represents a compromise between gain and ohmic loss. We suggest a novel solution to the loss problem by overcoating the copper transmission line with five electrical skin depths (?6 ?m) of Beryllium. Beryllium is reasonably transparent to x-rays above 800 eV and would improve the carrier current on the transmission line. The net result should be an optically flat photocathode response with almost no measurable loss in voltage along the transmission line.

  17. Minimal Ownership for Active Objects Dave Clarke1

    E-Print Network [OSTI]

    Johnsen, Einar Broch

    is in the context of the EU project IST-33826 CREDO: Modeling and anal- ysis of evolutionary structures for distributed services (http://credo.cwi.nl). #12;model. The resulting system would be as difficult to reason

  18. By Dave Tompkins OUR DEDICATION TO THE BOOB TUBE

    E-Print Network [OSTI]

    Hutter, Frank

    and shower. SAGITTARIUS (Nov. 22 ­ Dec. 21) CSI: It will be up to you to solve a murder. There will be rubber. 19) CSI Miami: It will be up to you to solve a murder. There will be rubber gloves and pseudo

  19. Topical Lunch Minutes 1. Dave Dieterich: the mission of CCSF

    E-Print Network [OSTI]

    Walter, M.Todd

    : Smart grid makes everything possible 15. Helene Schember and Mark Lawrence: Keep the group engaged mites 2. More theories 13. Tom Whitlow: a. Urban LTER i. Transactional cost of getting something

  20. Motion Planning in Urban Environments: Part I Dave Ferguson

    E-Print Network [OSTI]

    Likhachev, Maxim

    and intelligently with obstacles and other vehicles on roads, at intersections, and in parking lots; and perform]. The Urban Challenge competition was designed to extend this technology as far as possible towards the goal the software architecture used by Boss and the role of motion planning within that architecture. We

  1. Whoinspiredyoutobecomeascientist? My high school chemistry teacher Dave Clarke. I

    E-Print Network [OSTI]

    Leigh, David A.

    , energy storage, the way that muscles move, the way that cells communicate, ion channels. In contrast thing. That work is really the first interfacing of sophisticated molecules with silicon and electronics

  2. Microsoft Word - QER Dave Caldwell 21 April 2014.doc

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

    expect to recoup the cost in less than three years. In the event that the owners install photovoltaic solar panels, they would be living in a net zero home. As the Chair of the...

  3. SUMMER 2010 1 All insect images: Dave Cappaert, MSU

    E-Print Network [OSTI]

    Isaacs, Rufus

    security. See www.nepadbiosafety.net/ Dengue fever threatens 2.5 billion people each year and there is no vaccine or treatment. New research by MSU entomolo- gists has found that a bacterium can stop dengue viruses from replicating in the mosquitoes. Zhiyong Xi, assistant professor of entomology and the s

  4. COMMITTEE ON APPROPRIATIONS DAVE OBEY (D-WI), CHAIRMAN

    E-Print Network [OSTI]

    and Reinvestment Bill of 2009. This package is the first crucial step in a concerted effort to create and save 3 and Create Jobs · Lowering Healthcare Costs · Helping Workers Hurt by the Economy · Saving Public Sector Jobs

  5. David P. Feldman hornacek.coa.edu/dave

    E-Print Network [OSTI]

    Feldman, David P.

    ) - Physics II (3) - Physics III (3) - Physics and Mathematics of Sustainable Energy (4) - Introduction T 207 801.5709 B dfeldman@coa.edu Education 1998 Ph.D., Physics. University of California, Davis 1991 B.A., Physics. Carleton College, Northfield, MN. Current Position 1998­Present Professor of Physics

  6. David Alciatore ("Dr. Dave") ILLUSTRATED PRINCIPLES "Squirt Part I: introduction"

    E-Print Network [OSTI]

    Alciatore, David G.

    talking about a "low-deflection" shaft, things can be confusing. A "low squirt" shaft produces less "CB deflection" than an average shaft; but the end of the cue stick, because it is lighter than normal cues, actually deflects more after impact with the CB (e.g., see HSV A.109). So a low-squirt shaft produces

  7. SPATIO-TEMPORAL WEATHER MODELS Chris Glasbey & Dave Allcroft

    E-Print Network [OSTI]

    Stone, J. V.

    #12;QUESTION 1: If the Pentland Hills were covered with solar panels how would energy output vary? Solar radiation was measured at 10 sites every 10 minutes for a month 2 #12;All data 3 #12;QUESTION 2 variables · Gaussian or non-Gaussian · univariate or multivariate For example: Solar data 6 #12;Spatio

  8. Eshan V. Dave,1 Andrew F. Braham,2

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    . KEYWORDS: indirect tensile test, creep test, tensile strength test, viscoelasticity, finite element creep and strength properties of asphalt con- crete mixtures [2,3] in indirect tension. The test in AASHTO T322. Both properties are measured on the same sample, with the non-destructive creep test run

  9. Dr. Dave Moody to Lead the Carlsbad Field Office

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalentLaboratory |Sector FullDOE Office10 Jan2 InCorey CohnDanws U.S.

  10. Dr. Dave Moody to Lead the Carlsbad Field Office

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalentLaboratory |Sector FullDOE Office10 Jan2 InCorey CohnDanws

  11. Dr. Dave Moody to Lead the Carlsbad Field Office

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalentLaboratory |Sector FullDOE Office10 Jan2 InCorey CohnDanws(505)

  12. Thermoacoustic generation in anisotropic media

    E-Print Network [OSTI]

    Hildebrand, John A

    1986-01-01

    John Hildebrand: A. Thermoacoustic generation anisotropicsubstantial variation thermoacoustic in gen- erationisstress-strain relationfor thermoacoustic genera- tion and,if

  13. Self-assembling software generator

    DOE Patents [OSTI]

    Bouchard, Ann M. (Albuquerque, NM); Osbourn, Gordon C. (Albuquerque, NM)

    2011-11-25

    A technique to generate an executable task includes inspecting a task specification data structure to determine what software entities are to be generated to create the executable task, inspecting the task specification data structure to determine how the software entities will be linked after generating the software entities, inspecting the task specification data structure to determine logic to be executed by the software entities, and generating the software entities to create the executable task.

  14. Superconducting thermoelectric generator

    DOE Patents [OSTI]

    Metzger, J.D.; El-Genk, M.S.

    1996-01-01

    An apparatus and method for producing electricity from heat. The present invention is a thermoelectric generator that uses materials with substantially no electrical resistance, often called superconductors, to efficiently convert heat into electrical energy without resistive losses. Preferably, an array of superconducting elements is encased within a second material with a high thermal conductivity. The second material is preferably a semiconductor. Alternatively, the superconducting material can be doped on a base semiconducting material, or the superconducting material and the semiconducting material can exist as alternating, interleaved layers of waferlike materials. A temperature gradient imposed across the boundary of the two materials establishes an electrical potential related to the magnitude of the temperature gradient. The superconducting material carries the resulting electrical current at zero resistivity, thereby eliminating resistive losses. The elimination of resistive losses significantly increases the conversion efficiency of the thermoelectric device.

  15. Stratified vapor generator

    DOE Patents [OSTI]

    Bharathan, Desikan (Lakewood, CO); Hassani, Vahab (Golden, CO)

    2008-05-20

    A stratified vapor generator (110) comprises a first heating section (H.sub.1) and a second heating section (H.sub.2). The first and second heating sections (H.sub.1, H.sub.2) are arranged so that the inlet of the second heating section (H.sub.2) is operatively associated with the outlet of the first heating section (H.sub.1). A moisture separator (126) having a vapor outlet (164) and a liquid outlet (144) is operatively associated with the outlet (124) of the second heating section (H.sub.2). A cooling section (C.sub.1) is operatively associated with the liquid outlet (144) of the moisture separator (126) and includes an outlet that is operatively associated with the inlet of the second heating section (H.sub.2).

  16. Tailpulse signal generator

    DOE Patents [OSTI]

    Baker, John (Walnut Creek, CA); Archer, Daniel E. (Knoxville, TN); Luke, Stanley John (Pleasanton, CA); Decman, Daniel J. (Livermore, CA); White, Gregory K. (Livermore, CA)

    2009-06-23

    A tailpulse signal generating/simulating apparatus, system, and method designed to produce electronic pulses which simulate tailpulses produced by a gamma radiation detector, including the pileup effect caused by the characteristic exponential decay of the detector pulses, and the random Poisson distribution pulse timing for radioactive materials. A digital signal process (DSP) is programmed and configured to produce digital values corresponding to pseudo-randomly selected pulse amplitudes and pseudo-randomly selected Poisson timing intervals of the tailpulses. Pulse amplitude values are exponentially decayed while outputting the digital value to a digital to analog converter (DAC). And pulse amplitudes of new pulses are added to decaying pulses to simulate the pileup effect for enhanced realism in the simulation.

  17. Superconducting thermoelectric generator

    DOE Patents [OSTI]

    Metzger, J.D.; El-Genk, M.S.

    1998-05-05

    An apparatus and method for producing electricity from heat is disclosed. The present invention is a thermoelectric generator that uses materials with substantially no electrical resistance, often called superconductors, to efficiently convert heat into electrical energy without resistive losses. Preferably, an array of superconducting elements is encased within a second material with a high thermal conductivity. The second material is preferably a semiconductor. Alternatively, the superconducting material can be doped on a base semiconducting material, or the superconducting material and the semiconducting material can exist as alternating, interleaved layers of waferlike materials. A temperature gradient imposed across the boundary of the two materials establishes an electrical potential related to the magnitude of the temperature gradient. The superconducting material carries the resulting electrical current at zero resistivity, thereby eliminating resistive losses. The elimination of resistive losses significantly increases the conversion efficiency of the thermoelectric device. 4 figs.

  18. Superconducting thermoelectric generator

    DOE Patents [OSTI]

    Metzger, John D. (Eaton's Neck, NY); El-Genk, Mohamed S. (Albuquerque, NM)

    1998-01-01

    An apparatus and method for producing electricity from heat. The present invention is a thermoelectric generator that uses materials with substantially no electrical resistance, often called superconductors, to efficiently convert heat into electrical energy without resistive losses. Preferably, an array of superconducting elements is encased within a second material with a high thermal conductivity. The second material is preferably a semiconductor. Alternatively, the superconducting material can be doped on a base semiconducting material, or the superconducting material and the semiconducting material can exist as alternating, interleaved layers of waferlike materials. A temperature gradient imposed across the boundary of the two materials establishes an electrical potential related to the magnitude of the temperature gradient. The superconducting material carries the resulting electrical current at zero resistivity, thereby eliminating resistive losses. The elimination of resistive losses significantly increases the conversion efficiency of the thermoelectric device.

  19. Downhole hydraulic seismic generator

    DOE Patents [OSTI]

    Gregory, Danny L. (Corrales, NM); Hardee, Harry C. (Albuquerque, NM); Smallwood, David O. (Albuquerque, NM)

    1992-01-01

    A downhole hydraulic seismic generator system for transmitting energy wave vibrations into earth strata surrounding a borehole. The system contains an elongated, unitary housing operably connected to a well head aboveground by support and electrical cabling, and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a hydraulic oscillator containing a double-actuating piston whose movement is controlled by an electro-servovalve regulating a high pressure hydraulic fluid flow into and out of upper and lower chambers surrounding the piston. The spent hydraulic fluid from the hydraulic oscillator is stored and pumped back into the system to provide high pressure fluid for conducting another run at the same, or a different location within the borehole.

  20. Gate-Dependent Carrier Diffusion Length in Lead Selenide Quantum Dot Field-Effect Transistors

    E-Print Network [OSTI]

    Yu, Dong

    - generation photovoltaic devices and sensitive photodetec- tors.1-3 The potential for low fabrication cost investigated for their potential use in novel electronic devices. Of particular interest is their use in third using scalable manufacturing processes such as ink jet printing make them attractive candidates for next-generation