National Library of Energy BETA

Sample records for alt base time

  1. AltE | 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'S FUTURE.EnergyWoodenDateSA JumpSolar PV Jump to:AltE Jump to:

  2. Layout modification for library cell Alt-PSM composability Ke Cao, Jiang Hu, Mosong Cheng

    E-Print Network [OSTI]

    Hu, Jiang

    Layout modification for library cell Alt-PSM composability Ke Cao, Jiang Hu, Mosong Cheng Dept-wavelength lithography, light field Alt-PSM (Alternating Phase Shifting Mask) is an essential technology for poly layer printability. In a standard cell based design, the problem of obtaining Alt-PSM compliance for an individual

  3. Alte LLC | 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 LISTStar Energy LLC Jump to: navigation, search Name: Alliance StarAlte LLC Jump to:

  4. ALT-II armor tile design for upgraded TEXTOR operation

    SciTech Connect (OSTI)

    Newberry, B.L. [Univ. of Michigan, Ann Arbor, MI (United States); McGrath, R.T.; Watson, R.D. [Sandia National Labs., Albuquerque, NM (United States); Kohlhaas, W.; Finken, K.H. [Kernforschungsanlage Juelich GmbH (Germany). Inst. fuer Plasmaphysik; Noda, N. [National Inst. for Fusion Science, Nagoya (Japan)

    1994-08-01

    The upgrade of the TEXTOR tokamak at KFA Juelich was recently completed. This upgrade extended the TEXTOR pulse length from 5 seconds to 10 seconds. The auxiliary heating was increased to a total of 8.0 MW through a combination of neutral beam injection and radio frequency heating. Originally, the inertially cooled armor tiles of the full toroidal belt Advanced Limiter Test -- II (ALT-II) were designed for a 5-second operation with total heating of 6.0 MW. The upgrade of TEXTOR will increase the energy deposited per pulse onto the ALT-II by about 300%. Consequently, the graphite armor tiles for the ALT-II had to be redesigned to avoid excessively high graphite armor surface temperatures that would lead to unacceptable contamination of the plasma. This redesign took the form of two major changes in the ALT-II armor tile geometry. The first design change was an increase of the armor tile thermal mass, primarily by increasing the radial thickness of each tile from 17 mm to 20 mm. This increase in the radial tile dimension reduces the overall pumping efficiency of the ALT-II pump limiter by about 30%. The reduction in exhaust efficiency is unfortunate, but could be avoided only by active cooling of the ALT-II armor tiles. The active cooling option was too complicated and expensive to be considered at this time. The second design change involved redefining the plasma facing surface of each armor tile in order to fully utilize the entire surface area. The incident charged particle heat flux was distributed uniformly over the armor tile surfaces by carefully matching the radial, poloidal and toroidal curvature of each tile to the plasma flow in the TEXTOR boundary layer. This geometry redefinition complicates the manufacturing of the armor tiles, but results in significant thermal performance gains. In addition to these geometry upgrades, several material options were analyzed and evaluated.

  5. Twist-3 fragmentation effects for ALT in light hadron production...

    Office of Scientific and Technical Information (OSTI)

    Twist-3 fragmentation effects for ALT in light hadron production from proton-proton collisions Title: Twist-3 fragmentation effects for ALT in light hadron production from...

  6. Alternative Liquid Fuels Simulation Model (AltSim).

    SciTech Connect (OSTI)

    Williams, Ryan; Baker, Arnold Barry; Drennen, Thomas E.

    2009-12-01

    The Alternative Liquid Fuels Simulation Model (AltSim) is a high-level dynamic simulation model which calculates and compares the production and end use costs, greenhouse gas emissions, and energy balances of several alternative liquid transportation fuels. These fuels include: corn ethanol, cellulosic ethanol from various feedstocks (switchgrass, corn stover, forest residue, and farmed trees), biodiesel, and diesels derived from natural gas (gas to liquid, or GTL), coal (coal to liquid, or CTL), and coal with biomass (CBTL). AltSim allows for comprehensive sensitivity analyses on capital costs, operation and maintenance costs, renewable and fossil fuel feedstock costs, feedstock conversion ratio, financial assumptions, tax credits, CO{sub 2} taxes, and plant capacity factor. This paper summarizes the structure and methodology of AltSim, presents results, and provides a detailed sensitivity analysis. The Energy Independence and Security Act (EISA) of 2007 sets a goal for the increased use of biofuels in the U.S., ultimately reaching 36 billion gallons by 2022. AltSim's base case assumes EPA projected feedstock costs in 2022 (EPA, 2009). For the base case assumptions, AltSim estimates per gallon production costs for the five ethanol feedstocks (corn, switchgrass, corn stover, forest residue, and farmed trees) of $1.86, $2.32, $2.45, $1.52, and $1.91, respectively. The projected production cost of biodiesel is $1.81/gallon. The estimates for CTL without biomass range from $1.36 to $2.22. With biomass, the estimated costs increase, ranging from $2.19 per gallon for the CTL option with 8% biomass to $2.79 per gallon for the CTL option with 30% biomass and carbon capture and sequestration. AltSim compares the greenhouse gas emissions (GHG) associated with both the production and consumption of the various fuels. EISA allows fuels emitting 20% less greenhouse gases (GHG) than conventional gasoline and diesels to qualify as renewable fuels. This allows several of the CBTL options to be included under the EISA mandate. The estimated GHG emissions associated with the production of gasoline and diesel are 19.80 and 18.40 kg of CO{sub 2} equivalent per MMBtu (kgCO{sub 2}e/MMBtu), respectively (NETL, 2008). The estimated emissions are significantly higher for several alternatives: ethanol from corn (70.6), GTL (51.9), and CTL without biomass or sequestration (123-161). Projected emissions for several other alternatives are lower; integrating biomass and sequestration in the CTL processes can even result in negative net emissions. For example, CTL with 30% biomass and 91.5% sequestration has estimated production emissions of -38 kgCO{sub 2}e/MMBtu. AltSim also estimates the projected well-to-wheel, or lifecycle, emissions from consuming each of the various fuels. Vehicles fueled with conventional diesel or gasoline and driven 12,500 miles per year emit 5.72-5.93 tons of CO{sub 2} equivalents per year (tCO{sub 2}e/yr). Those emissions are significantly higher for vehicles fueled with 100% ethanol from corn (8.03 tCO{sub 2}e/yr) or diesel from CTL without sequestration (10.86 to 12.85 tCO{sub 2}/yr). Emissions could be significantly lower for vehicles fueled with diesel from CBTL with various shares of biomass. For example, for CTL with 30% biomass and carbon sequestration, emissions would be 2.21 tCO{sub 2}e per year, or just 39% of the emissions for a vehicle fueled with conventional diesel. While the results presented above provide very specific estimates for each option, AltSim's true potential is as a tool for educating policy makers and for exploring 'what if?' type questions. For example, AltSim allows one to consider the affect of various levels of carbon taxes on the production cost estimates, as well as increased costs to the end user on an annual basis. Other sections of AltSim allow the user to understand the implications of various polices in terms of costs to the government or land use requirements. AltSim's structure allows the end user to explore each of these alternatives and understand the sensitivities implications a

  7. ALT-3 Target & CMU Version 4

    SciTech Connect (OSTI)

    Griego, Jeffrey R; Atchison, Walter L.; Holtkamp, David; Oro, David M.; Reinovsky, Robert E.; Rousculp, Christopher L.; Tabaka, Leonard J.

    2012-06-11

    The third Advance Liner Technology (ALT-3) experiment is the next in a long tradition of collaborations between LANL and RFNC/VNIIEF in high-explosive pulsed-power. Here a VNIIEF provided Disk Explosive Magnetic Generator (DEMG) will drive a LANL provided experimental load and diagnostic package. The objective of the experiment is to explore the use of a cylindrical liner-ontarget in tera-Pascal equation of state measurement. This presentation will discuss version 4 of the experimental target and central measuring unit (CMU) along with R & D already performed in fabrication of the target.

  8. AltAir Fuels | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAand DaltonSolarOpen5All HomeAlphakat GmbH JumpAlso Energy Jump to:AltAir

  9. AltPower Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowaWisconsin: EnergyYork Jump to: navigation, searchAlpena, Michigan:AltPower

  10. Alternative Liquid Fuels Simulation Model (AltSim).

    SciTech Connect (OSTI)

    Baker, Arnold Barry; Williams, Ryan (Hobart and William Smith Colleges, Geneva, NY); Drennen, Thomas E.; Klotz, Richard (Hobart and William Smith Colleges, Geneva, NY)

    2007-10-01

    The Alternative Liquid Fuels Simulation Model (AltSim) is a high-level dynamic simulation model which calculates and compares the production costs, carbon dioxide emissions, and energy balances of several alternative liquid transportation fuels. These fuels include: corn ethanol, cellulosic ethanol, biodiesel, and diesels derived from natural gas (gas to liquid, or GTL) and coal (coal to liquid, or CTL). AltSim allows for comprehensive sensitivity analyses on capital costs, operation and maintenance costs, renewable and fossil fuel feedstock costs, feedstock conversion efficiency, financial assumptions, tax credits, CO{sub 2} taxes, and plant capacity factor. This paper summarizes the preliminary results from the model. For the base cases, CTL and cellulosic ethanol are the least cost fuel options, at $1.60 and $1.71 per gallon, respectively. Base case assumptions do not include tax or other credits. This compares to a $2.35/gallon production cost of gasoline at September, 2007 crude oil prices ($80.57/barrel). On an energy content basis, the CTL is the low cost alternative, at $12.90/MMBtu, compared to $22.47/MMBtu for cellulosic ethanol. In terms of carbon dioxide emissions, a typical vehicle fueled with cellulosic ethanol will release 0.48 tons CO{sub 2} per year, compared to 13.23 tons per year for coal to liquid.

  11. EE 362.3 (3L-3P alt. weeks) Digital Signal Processing

    E-Print Network [OSTI]

    Saskatchewan, University of

    EE 362.3 (3L-3P alt. weeks) Digital Signal Processing Department of Electrical and Computer Engineering Fall 2014 Description: This course covers the basic theory of discrete-time signal processing (L05) Textbook: Alan V. Oppenheim and Ronald W. Schafer, Discrete-Time Signal Processing, 3rd Ed

  12. ,"Energy","Water","Renewable","Petroleum","Alt. Fuel",,"On-Line...

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

    Energy","Water","Renewable","Petroleum","Alt. Fuel",,"On-Line Data Collection System",,"Report Period","Due In",,,"Primary","Secondary","Secondary" 2003,,,"EMS4","Environmental...

  13. Diorganosilacetylene-alt-diorganosilvinylene polymers and a process of preparation

    DOE Patents [OSTI]

    Barton, T.J.; Ijadi-Maghsoodi, S.; Yi Pang.

    1993-08-31

    The present invention provides linear organosilicon polymers including acetylene and vinylene moieties, and a process for their preparation. These diorganosilacetylene-alt-diorganosilvinylene linear polymers can be represented by the formula: -[-(R[sup 1])(R[sup 2])Si-C[triple bond]C-(R[sup 3])(R[sup 4])Si-CH[double bond]CH-][sub n]-, wherein n[>=]2; each R[sup 1], R[sup 2], R[sup 3], and R[sup 4] is independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, aryl, and aralkyl radicals. The polymers are soluble in organic solvents, air stable, and can be pulled into fibers or cast into films. They can be thermally converted into silicon carbide ceramic materials.

  14. Diorganosilacetylene-alt-diorganosilvinylene polymers and a process of preparation

    DOE Patents [OSTI]

    Barton, T.J.; Ijadi-Maghsoodi, S.; Pang, Y.

    1995-10-10

    The present invention provides linear organosilicon polymers including acetylene and vinylene moieties, and a process for their preparation. These diorganosilacetylene-alt-diorganosilvinylene linear polymers can be represented by the formula: --[--(R{sup 1})(R{sup 2})Si--C{triple_bond}C--(R{sup 3})(R{sup 4})Si--CH{double_bond}CH--]{sub n}--, wherein n{>=}2; and each R{sup 1}, R{sup 2}, R{sup 3}, and R{sup 4} is independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, aryl, and aralkyl radicals. The polymers are soluble in organic solvents, air stable, and can be pulled into fibers or cast into films. They can be thermally converted into silicon carbide ceramic materials.

  15. Twist-3 fragmentation effects for $A_{LT}$ in light hadron production from proton-proton collisions

    E-Print Network [OSTI]

    Koike, Y; Takagi, Y; Yoshida, S

    2015-01-01

    We compute the contribution from the twist-3 fragmentation function for light hadron production in collisions between transversely and longitudinally polarized protons, i.e., $p^\\uparrow \\vec{p} \\to h\\,X$, which can cause a double-spin asymmetry (DSA) $A_{LT}$. This is a na\\"{i}ve T-even twist-3 observable that we analyze in collinear factorization using both Feynman gauge and lightcone gauge as well as give a general proof of color gauge invariance. So far only twist-3 effects in the transversely polarized proton have been studied for $A_{LT}$ in $p^\\uparrow \\vec{p} \\to h\\,X$. However, there are indications that the na\\"{i}ve T-odd transverse single-spin asymmetry (SSA) $A_N$ in $p^\\uparrow p \\to h\\,X$ is dominated not by such distribution effects but rather by a fragmentation mechanism. Therefore, one may expect similarly that the fragmentation contribution is important for $A_{LT}$. Given possible plans at RHIC to measure this observable, it is timely to provide a calculation of this term.

  16. Users' View on Context-Sensitive Car Advertisements Florian Alt, Christoph Evers, Albrecht Schmidt

    E-Print Network [OSTI]

    Users' View on Context-Sensitive Car Advertisements Florian Alt, Christoph Evers, Albrecht Schmidt.alt, albrecht.schmidt}@uni-due.de christoph.evers@stud.uni-due.de Abstract. Cars are ubiquitous and offer large static, with the exception of car-mounted displays that offer dy- namic content. With new display

  17. Tips: Time-Based Electricity Rates | Department of Energy

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

    Tips: Time-Based Electricity Rates Tips: Time-Based Electricity Rates July 27, 2014 - 8:09pm Addthis Time-based electricity programs encourage you to use energy when the demand is...

  18. Tips: Time-Based Electricity Rates | Department of Energy

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

    Time-based electricity programs encourage you to use energy when the demand is low by giving you a lower price for electricity during those times. Time-based electricity programs...

  19. Practical Lessons From Creating the Control-Alt-Hack Card Game and Research Challenges for Games In Education and Research

    E-Print Network [OSTI]

    Washington at Seattle, University of

    Practical Lessons From Creating the Control-Alt-Hack Card Game and Research Challenges for Games, produced, distributed, and evaluated Con- trol-Alt-HackTM: a recreational tabletop card game in- tended we released Control-Alt-Hack: White Hat Hacking for Fun and ProfitTM--a recreation- al tabletop card

  20. Control-Alt-Hack: The Design and Evaluation of a Card Game for Computer Security Awareness and Education

    E-Print Network [OSTI]

    Kohno, Tadayoshi

    Control-Alt-Hack: The Design and Evaluation of a Card Game for Computer Security Awareness from 22 of these educators about their experiences using Control-Alt-Hack with over 450 students to thinking about security and that facilitates ad hoc, social interactions led us to design Control-Alt-Hack

  1. Library Cell Layout with Alt-PSM Compliance and Composability Ke Cao, Puneet Dhawan and Jiang Hu

    E-Print Network [OSTI]

    Hu, Jiang

    Library Cell Layout with Alt-PSM Compliance and Composability Ke Cao, Puneet Dhawan and Jiang Hu and feasibility of deploying the RET such as Alternating Phase Shift- ing Mask (Alt-PSM) depend heavily on circuit that can achieve Alt- PSM compliance and composability in a constructive manner. Compared to previously

  2. Karl-Christ-Preis fr Alte Geschichte PortrtKarlChristBarbaraKlemm,mitfreundlicherGenehmigung

    E-Print Network [OSTI]

    Richner, Heinz

    , 5. Stock Hochschulstrasse 4 CH - 3012 Bern 25 12 6 10 6 5 4 14 14 6 2 5 16 18 11 9a 1 3 10 8, Historisches Institut, Abteilung Alte Geschichte, Länggassstr. 49, CH - 3012 Bern hedy

  3. Head & base production optimization : setup time reduction

    E-Print Network [OSTI]

    Guo, Haiqing

    2009-01-01

    At Schlumberger, the make-to-order strategy and number of Head & Base product types (about 1000 types) requires a flexible manufacturing system in which the machine setup is frequent. However, the lengthy CNC machine setup ...

  4. Real Time PMU-Based Stability Monitoring Final Project Report

    E-Print Network [OSTI]

    Real Time PMU-Based Stability Monitoring Final Project Report Power Systems Engineering Research Center Empowering Minds to Engineer the Future Electric Energy System #12;#12;Real Time PMU for the Power Systems Engineering Research Center (PSERC) research project titled "Real Time PMU-based Stability

  5. Optimization of time-based rates in forward energy markets

    E-Print Network [OSTI]

    Wang, J.

    This paper presents a new two-step design approach of Time-Based Rate (TBR) programs for markets with a high penetration of variable energy sources such as wind power. First, an optimal market time horizon must be determined ...

  6. CME 433.3 (3L-3P alt. weeks) Digital Systems Architecture

    E-Print Network [OSTI]

    Saskatchewan, University of

    CME 433.3 (3L-3P alt. weeks) Digital Systems Architecture Department of Electrical and Computer Engineering Fall 2014-15 Description: Components and architecture complement each other in the design Architecture, 5th Ed.: A Quantitative Approach Behrooz Parhami, Computer Architecture: From Microprocessors

  7. EE 202.3 (3L-3P alt weeks) Electric and Magnetic Fields and Circuits

    E-Print Network [OSTI]

    Saskatchewan, University of

    for magnetic circuits, principles of linear motors and generators The course is about 1/3 fields and 2EE 202.3 (3L-3P alt weeks) Electric and Magnetic Fields and Circuits Department of Electrical and Computer Engineering Fall 2015 Description: Further develops the theory and analysis of electric

  8. CME 435.3 (3L 3P alt weeks) Verification of Digital Systems

    E-Print Network [OSTI]

    Saskatchewan, University of

    CME 435.3 (3L ­ 3P alt weeks) Verification of Digital Systems Department of Electrical and Computer methodologies, and SystemVerilog fundamentals, and gradually builds to more complex examples and advanced topicsVerilog - History - Data Types - Procedural Statements - Functions and Tasks - Modules 5. Basic Stimulus Generation

  9. Alt Text Requirements for Web Images | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based Fuels Research at NRELDepartmentJune 2,2-13) All Other* * *AlpenaGraphics

  10. Time-Based Behaviors at an Interactive Science Museum

    E-Print Network [OSTI]

    Short, Daniel

    Time-Based Behaviors at an Interactive Science Museum: Exploring the Differences between Weekday@sunstroke.sdsu.edu Received 21 October 1996; accepted 15 May 1997 ABSTRACT: The purpose of this study was to determine if time) regardless of the day of the visit, families spent more time than nonfamilies in individual exhibitions

  11. Author's personal copy GPU based real-time instrument tracking

    E-Print Network [OSTI]

    Author's personal copy GPU based real-time instrument tracking with three-dimensional ultrasound q April 2007; accepted 4 June 2007 Available online 5 July 2007 Abstract Real-time three-dimensional ultrasound enables new intracardiac surgical procedures, but the distorted appearance of instruments

  12. VIRTUAL TIME BASED DYNAMIC LOAD MANAGEMENT IN THE TIME WARP OPERATING SYSTEM

    E-Print Network [OSTI]

    California at Los Angeles, University of

    VIRTUAL TIME BASED DYNAMIC LOAD MANAGEMENT IN THE TIME WARP OPERATING SYSTEM Peter L. Reiher Jet on parallel machines. Recently TWOS has been substantially improved by the addition of dynamic load management to processors. Because TWOS uses optimistic synchronization, existing load management theory, which tends

  13. Double spin asymmetry AL?T? in charged pion production from deep inelastic scattering on a transversely polarized ³He target

    E-Print Network [OSTI]

    Huang, Jin, Ph. D. Massachusetts Institute of Technology

    2012-01-01

    In this thesis I discuss the first measurement of the beam-target double-spin asymmetry ALT for charged pion electroproduction in deep inelastic electron scattering on a transversely polarized 3He target. These data were ...

  14. FIELD-BASED TECHNOLOGY EDUCATION: JUST IN TIME TECHNOLOGY TRAINING

    E-Print Network [OSTI]

    Larkin, Teresa L.

    FIELD-BASED TECHNOLOGY EDUCATION: JUST IN TIME TECHNOLOGY TRAINING Sarah Irvine Belson1 and Teresa, Audio Technology, and Physics, American University, 4400 Massachusetts Ave. NW, Washington, DC 20016, tlarkin@american.edu Abstract -- This paper outlines the current status of technology integration

  15. Property:EIA/861/AltFuelVehicle2 | 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 ViewMayo,AltFuelVehicle2 Jump to: navigation, search This is a property of type Boolean.

  16. Time-stretch microscopy based on time-wavelength sequence reconstruction from wideband incoherent source

    SciTech Connect (OSTI)

    Zhang, Chi Xu, Yiqing; Wei, Xiaoming; Tsia, Kevin K.; Wong, Kenneth K. Y.

    2014-07-28

    Time-stretch microscopy has emerged as an ultrafast optical imaging concept offering the unprecedented combination of the imaging speed and sensitivity. However, dedicated wideband and coherence optical pulse source with high shot-to-shot stability has been mandated for time-wavelength mapping—the enabling process for ultrahigh speed wavelength-encoded image retrieval. From the practical point of view, exploiting methods to relax the stringent requirements (e.g., temporal stability and coherence) for the source of time-stretch microscopy is thus of great value. In this paper, we demonstrated time-stretch microscopy by reconstructing the time-wavelength mapping sequence from a wideband incoherent source. Utilizing the time-lens focusing mechanism mediated by a narrow-band pulse source, this approach allows generation of a wideband incoherent source, with the spectral efficiency enhanced by a factor of 18. As a proof-of-principle demonstration, time-stretch imaging with the scan rate as high as MHz and diffraction-limited resolution is achieved based on the wideband incoherent source. We note that the concept of time-wavelength sequence reconstruction from wideband incoherent source can also be generalized to any high-speed optical real-time measurements, where wavelength is acted as the information carrier.

  17. Synchronizing compute node time bases in a parallel computer

    DOE Patents [OSTI]

    Chen, Dong; Faraj, Daniel A; Gooding, Thomas M; Heidelberger, Philip

    2014-12-30

    Synchronizing time bases in a parallel computer that includes compute nodes organized for data communications in a tree network, where one compute node is designated as a root, and, for each compute node: calculating data transmission latency from the root to the compute node; configuring a thread as a pulse waiter; initializing a wakeup unit; and performing a local barrier operation; upon each node completing the local barrier operation, entering, by all compute nodes, a global barrier operation; upon all nodes entering the global barrier operation, sending, to all the compute nodes, a pulse signal; and for each compute node upon receiving the pulse signal: waking, by the wakeup unit, the pulse waiter; setting a time base for the compute node equal to the data transmission latency between the root node and the compute node; and exiting the global barrier operation.

  18. Time-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing in Duty-Cycle Wireless Sensor Networks withDuty-Cycle Wireless Sensor Networks withDuty-Cycle Wireles

    E-Print Network [OSTI]

    Wu, Jie

    Time-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing inTime-Sensitive Utility-Based Routing in Duty-Cycle Wireless Sensor Networks with TEMPLE UNIVERSITY #12;Introduction: utility-based routingIntroduction: utility-based routing

  19. Developing Embedded/Real-Time and Cyber-Physical Systems: Functional Reactive Programming, RTL-based Formal Verification, Response Time

    E-Print Network [OSTI]

    Cheng, Albert M. K.

    , specification, modeling, scheduling, and formal verification of real- time, embedded, and cyber-physical systems-based Formal Verification, Response Time Analysis, and Power-Aware Scheduling Albert M. K. Cheng Real reactive programming, RTL (real-time logic)-based formal verification, response time analysis, and power

  20. Diorganosilacetylene-alt-diorganosilvinylene polymers and a process densifying porous silicon-carbide bodies

    DOE Patents [OSTI]

    Barton, T.J.; Ijadi-Maghsoodi, S.; Pang, Y.

    1994-05-17

    The present invention provides linear organosilicon polymers including acetylene and vinylene moieties, and a process for their preparation. These diorganosilacetylene-alt-diorganosilvinylene linear polymers can be represented by the formula: --[--(R[sup 1])(R[sup 2])Si--C[triple bond]C-(R[sup 3])(R[sup 4])Si--CH[double bond]CH--][sub n]--, wherein n[>=]2; and each R[sup 1], R[sup 2], R[sup 3], and R[sup 4] is independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, aryl, and aralkyl radicals. The polymers are soluble in organic solvents, air stable, and can be pulled into fibers or cast into films. They can be thermally converted into silicon carbide ceramic materials.

  1. Engine control system having pressure-based timing

    DOE Patents [OSTI]

    Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

    2011-10-04

    A control system for an engine having a first cylinder and a second cylinder is disclosed having a first engine valve movable to regulate a fluid flow of the first cylinder and a first actuator associated with the first engine valve. The control system also has a second engine valve movable to regulate a fluid flow of the second cylinder and a sensor configured to generate a signal indicative of a pressure within the first cylinder. The control system also has a controller that is in communication with the first actuator and the sensor. The controller is configured to compare the pressure within the first cylinder with a desired pressure and selectively regulate the first actuator to adjust a timing of the first engine valve independently of the timing of the second engine valve based on the comparison.

  2. Engine control system having speed-based timing

    DOE Patents [OSTI]

    Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

    2012-02-14

    A control system for an engine having a cylinder is disclosed having an engine valve movable to regulate a fluid flow of the cylinder and an actuator associated with the engine valve. The control system also has a controller in communication with the actuator. The controller is configured to receive a signal indicative of engine speed and compare the engine speed signal with a desired engine speed. The controller is also configured to selectively regulate the actuator to adjust a timing of the engine valve to control an amount of air/fuel mixture delivered to the cylinder based on the comparison.

  3. Engine control system having fuel-based timing

    DOE Patents [OSTI]

    Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

    2012-04-03

    A control system for an engine having a cylinder is disclosed having an engine valve movable to regulate a fluid flow of the cylinder and an actuator associated with the engine valve. The control system also has a sensor configured to generate a signal indicative of an amount of an air/fuel mixture remaining within the cylinder after completion of a first combustion event and a controller in communication with the actuator and the sensor. The controller may be configured to compare the amount with a desired amount, and to selectively regulate the actuator to adjust a timing of the engine valve associated with a subsequent combustion event based on the comparison.

  4. Synthesis of monodispersed CdSe nanocrystals in poly(styrene-alt-maleic anhydride) at room temperature

    SciTech Connect (OSTI)

    Liu, S.H.; Qian, X.F.; Yuan, J.Y.; Yin, J.; He, R.; Zhu, Z.K

    2003-07-14

    Nanocomposite of CdSe/poly(styrene-alt-maleic anhydride) (PSM) was successfully prepared via an in situ reaction process at room temperature and ambient pressure. Transmission electron microscopy (TEM) analysis revealed that CdSe nanoparticles with a small size and narrow size distribution were obtained. The obtained nanocomposite was also characterized by FT-IR, XRD, ultraviolet-visible, and fluorescence spectroscopy.

  5. Highly charged ion based time of flight emission microscope

    DOE Patents [OSTI]

    Barnes, Alan V. (Livermore, CA); Schenkel, Thomas (San Francisco, CA); Hamza, Alex V. (Livermore, CA); Schneider, Dieter H. (Livermore, CA); Doyle, Barney (Albuquerque, NM)

    2001-01-01

    A highly charged ion based time-of-flight emission microscope has been designed, which improves the surface sensitivity of static SIMS measurements because of the higher ionization probability of highly charged ions. Slow, highly charged ions are produced in an electron beam ion trap and are directed to the sample surface. The sputtered secondary ions and electrons pass through a specially designed objective lens to a microchannel plate detector. This new instrument permits high surface sensitivity (10.sup.10 atoms/cm.sup.2), high spatial resolution (100 nm), and chemical structural information due to the high molecular ion yields. The high secondary ion yield permits coincidence counting, which can be used to enhance determination of chemical and topological structure and to correlate specific molecular species.

  6. SumTime-Turbine: A Knowledge-Based System to Communicate Gas Turbine Time-Series Data

    E-Print Network [OSTI]

    Reiter, Ehud

    SumTime-Turbine: A Knowledge-Based System to Communicate Gas Turbine Time-Series Data Jin Yu of Aberdeen Aberdeen, AB24 3UE, UK {jyu, ereiter, jhunter, ssripada}@csd.abdn.ac.uk Abstract: SumTime-Turbine produces textual summaries of archived time- series data from gas turbines. These summaries should help

  7. TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility-based Routing in Delay Tolerant Networksbased Routing in Delay Tolerant Networksbas

    E-Print Network [OSTI]

    Wu, Jie

    TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility-TOUR: Time-sensitive Opportunistic Utility- based Routing in Delay Tolerant Networksbased on utility-based routingIntroduction on utility-based routingIntroduction on utility-based routing

  8. Real-time communication in FDDI-based networks 

    E-Print Network [OSTI]

    Kumar, Amit Virendra

    1995-01-01

    The Fiber Distributed Data Interface (FDDI) is recommended as a candidate for many hard real-time local-area communication systems. The Timed-Token Medium Access Control (MAC) Protocol of FDDI is capable of guaranteeing ...

  9. Tunneling time calculations for general finite wavepackets based on the presence time formalism

    E-Print Network [OSTI]

    O. del Barco; M. Ortuño; V. Gasparian

    2015-05-31

    We analyze the tunneling time problem via the presence time formalism. With this method we reproduce previous results for very long wavepackets and we are able to calculate the tunneling time for general wavepackets of arbitrary shape and length. The tunneling time for a general wavepacket is equal to the average over the energy components of the standard phase time. With this approach we can also calculate the time uncertainty. We have checked that the results obtained with this approach agree extremely well with numerical simulations of the wavepacket evolution.

  10. Beam-Target Double Spin Asymmetry A_LT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized He-3 Target at 1.4

    E-Print Network [OSTI]

    J. Huang; K. Allada; C. Dutta; J. Katich; X. Qian; Y. Wang; Y. Zhang; K. Aniol; J. R. M. Annand; T. Averett; F. Benmokhtar; W. Bertozzi; P. C. Bradshaw; P. Bosted; A. Camsonne; M. Canan; G. D. Cates; C. Chen; J. -P. Chen; W. Chen; K. Chirapatpimol; E. Chudakov; E. Cisbani; J. C. Cornejo; F. Cusanno; M. M. Dalton; W. Deconinck; C. W. de Jager; R. De Leo; X. Deng; A. Deur; H. Ding; P. A. M. Dolph; D. Dutta; L. El Fassi; S. Frullani; H. Gao; F. Garibaldi; D. Gaskell; S. Gilad; R. Gilman; O. Glamazdin; S. Golge; L. Guo; D. Hamilton; O. Hansen; D. W. Higinbotham; T. Holmstrom; M. Huang; H. F. Ibrahim; M. Iodice; X. Jiang; G. Jin; M. K. Jones; A. Kelleher; W. Kim; A. Kolarkar; W. Korsch; J. J. LeRose; X. Li; Y. Li; R. Lindgren; N. Liyanage; E. Long; H. -J. Lu; D. J. Margaziotis; P. Markowitz; S. Marrone; D. McNulty; Z. -E. Meziani; R. Michaels; B. Moffit; C. Muñoz Camacho; S. Nanda; A. Narayan; V. Nelyubin; B. Norum; Y. Oh; M. Osipenko; D. Parno; J. C. Peng; S. K. Phillips; M. Posik; A. J. R. Puckett; Y. Qiang; A. Rakhman; R. D. Ransome; S. Riordan; A. Saha; B. Sawatzky; E. Schulte; A. Shahinyan; M. H. Shabestari; S. Širca; S. Stepanyan; R. Subedi; V. Sulkosky; L. -G. Tang; A. Tobias; G. M. Urciuoli; I. Vilardi; K. Wang; B. Wojtsekhowski; X. Yan; H. Yao; Y. Ye; Z. Ye; L. Yuan; X. Zhan; Y. -W. Zhang; B. Zhao; X. Zheng; L. Zhu; X. Zhu; X. Zong; for the Jefferson Lab Hall A Collaboration

    2012-02-10

    We report the first measurement of the double-spin asymmetry $A_{LT}$ for charged pion electroproduction in semi\

  11. Discrimination of Locally Stationary Time Series Based on the Excess Mass Functional

    E-Print Network [OSTI]

    Polonik, Wolfgang

    Discrimination of Locally Stationary Time Series Based on the Excess Mass Functional Gabriel CHANDLER and Wolfgang POLONIK Discrimination of time series is an important practical problem the time series. Instead, features are measured for each time series, and discrimination is based

  12. Embedded Databases for Embedded Real-Time Systems: A Component-Based Approach1

    E-Print Network [OSTI]

    Embedded Databases for Embedded Real-Time Systems: A Component-Based Approach1 Aleksandra Tesanovi of embedded real-time systems has increased dramatically. At the same time, the amount of data that needs in embedded real-time systems. However, a database that can be used in an embedded real-time system must

  13. Real Time PMU-Based Stability Monitoring Final Project Report

    E-Print Network [OSTI]

    Center Empowering Minds to Engineer the Future Electric Energy System #12;#12;Real Time PMU, Western Area Power Administration Clifton Black, Southern Company David Schooley, Exelon the increasing amount of PMU data for operation, planning, protection, and control. This research proposes new

  14. TIME-BASED COORDINATED CHECKPOINTING NUNO F. NEVES

    E-Print Network [OSTI]

    Neves, Nuno

    checkpoint protocol that is well adapted to mobile environments. It uses time to indi- rectly coordinate the creation of new global states, and it saves two different types of checkpoints to adapt its behavior with standard benchmarks. RENEW - Recoverable Network of Workstations provides a flexible set of operations

  15. Real-time system verification techniques based on abstraction/deduction and model checking

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Real-time system verification techniques based on abstraction/deduction and model checking Eun in or- der to obtain a powerful and highly automatic verification environment for real-time systems. One-Young.Kang@loria.fr Abstract. Our research focuses on verification techniques for real-time systems based on predicate

  16. Sampling-Based Direct Trajectory Generation Using the Minimum Time Cost Function

    E-Print Network [OSTI]

    Collins, Emmanuel

    Sampling-Based Direct Trajectory Generation Using the Minimum Time Cost Function Oscar Chuy for computationally efficient, direct trajectory generation using sampling with the minimum time cost function, where" (i.e, a rigorous lower bound on the chosen cost) based on the solution of a minimum time control

  17. An Efficient GPU-based Time Domain Solver for the Acoustic Wave Equation Ravish Mehraa,1

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    An Efficient GPU-based Time Domain Solver for the Acoustic Wave Equation Ravish Mehraa,1 , Nikunj of the acoustic wave equation for the purpose of room acoustics is presented. It is based on adaptive rectangular. Keywords: Time-domain wave equation solver, Room acoustics, GPU-based algorithms. 1. Introduction

  18. Translating Indian miniature paintings into a time-based medium 

    E-Print Network [OSTI]

    Vaidya, Aradhana

    2008-10-10

    the window, 32 and as we follow the bird we move up into the sky, where there a lot of colorful kites. Kites flying in the open skies symbolize freedom in contrast to the woman’s trapped condition. She truly aspires to freedom, like a bird or a kite.... Then we see a kite falling and continuing to fall until it gets stuck on a tree branch. By this time the woman is on her front terrace. On seeing the fluttering kite, she approaches and releases it. As we move closer to her face, we see a soft smile...

  19. Linearized inverse scattering based on seismic Reverse Time Migration

    E-Print Network [OSTI]

    Tim J. P. M. Op 't Root; Christiaan C. Stolk; Maarten V. de Hoop

    2011-01-21

    In this paper we study the linearized inverse problem associated with imaging of reflection seismic data. We introduce an inverse scattering transform derived from reverse-time migration (RTM). In the process, the explicit evaluation of the so-called normal operator is avoided, while other differential and pseudodifferential operator factors are introduced. We prove that, under certain conditions, the transform yields a partial inverse, and support this with numerical simulations. In addition, we explain the recently discussed 'low-frequency artifacts' in RTM, which are naturally removed by the new method.

  20. Assembly lead time reduction in a semiconductor capital equipment plant through constraint based scheduling

    E-Print Network [OSTI]

    Sedore, Blake William Clark

    2014-01-01

    The assembly protocols for a semiconductor capital equipment machine were analyzed for potential lead time reduction. The objective of this study was to determine the minimum assembly lead time for the machine based on the ...

  1. Persistence of Energy Efficiency Behaviors over Time: Evidence from a Community-Based Program

    E-Print Network [OSTI]

    Whitsett, Donna D PhD; Justus, Hannah C; Steiner, Ellen; Duffy, Kevin

    2013-01-01

    Persistence of Energy Efficiency Behaviors over Time:programs into utility energy efficiency program portfolios.of a community-based energy efficiency program showing

  2. Real Time (20 Second) Data Base Single Loop (Packed into 3 bytes)

    E-Print Network [OSTI]

    ) Data Base Single Loop (Packed into 3 bytes) ------------------------------------------- Data Element;------------------------------------------------------------------------- --- Real Time (20 Second) Data Base Station (Packed into 3 bytes Loops | 3 | [0]|Data Present, 0=No Data | |Scan Cnt| 11 | [0]|

  3. A Real-Time Reliability Model for Ontology-Based Dynamic Web Service Composition

    E-Print Network [OSTI]

    Xu, Haiping

    153 A Real-Time Reliability Model for Ontology-Based Dynamic Web Service Composition Harmeet Chawla--Ontology-based web service composition allows for integration of available web services in real-time to meet desired objectives. In order to evaluate the quality of composite web services at runtime, there is a pressing need

  4. Analytical, Wavelet and Frequency based Mathematical Models for Real-Time Rendering

    E-Print Network [OSTI]

    Columbia University

    Analytical, Wavelet and Frequency based Mathematical Models for Real-Time Rendering Bo Sun School of Arts and Sciences COLUMBIA UNIVERSITY 2008 #12;c 2008 Bo Sun All Rights Reserved #12;ABSTRACT Analytical, Wavelet and Frequency based Mathematical Models for Real-Time Rendering Bo Sun Real

  5. SIMULATION-BASED ANALYSIS OF TIMED REBECA USING TEPROP AND SQL

    E-Print Network [OSTI]

    Karlsson, Brynjar

    SIMULATION-BASED ANALYSIS OF TIMED REBECA USING TEPROP AND SQL Brynjar Magnússon Master of Science 1670-8539 #12;#12;Simulation-based Analysis of Timed Rebeca using TeProp and SQL by Brynjar Magnússon using TeProp and SQL Brynjar Magnússon June 2012 Abstract As software systems get larger, more complex

  6. A METHOD FOR IDENTIFYING REPETITION STRUCTURE IN MUSICAL AUDIO BASED ON TIME SERIES PREDICTION

    E-Print Network [OSTI]

    Dixon, Simon

    A METHOD FOR IDENTIFYING REPETITION STRUCTURE IN MUSICAL AUDIO BASED ON TIME SERIES PREDICTION This paper investigates techniques for determining the repeti- tion structure of musical audio. In particular. To this end, we propose a novel approach based on multivari- ate time series modelling of audio features

  7. The Case For Prediction-based Best-effort Real-time Systems

    E-Print Network [OSTI]

    The Case For Prediction-based Best-effort Real-time Systems Peter A. Dinda Bruce Lowekamp Loukas and Distributed Real- Time Systems (WPDRTS '99) Abstract We propose a prediction-based best-effort real significant examples, an earthquake visualization tool and a GIS map display tool, and show how they could

  8. Topographically-Based Real-Time Traffic Anomaly Detection in a Metropolitan Highway System

    E-Print Network [OSTI]

    Grossman, Robert

    Topographically-Based Real-Time Traffic Anomaly Detection in a Metropolitan Highway System Rajmonda metropolitan area. Our Chicago Alert System (CAS) considers both the spatial and temporal aspects of the data of attack, the need for real-time traffic management is crucial. Real-time traffic management encompasses

  9. Beam-Target Double Spin Asymmetry ALT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized 3He Target at 1.422

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

    Meziani, Z -E; Michaels, R; Munoz Camacho, C; Nanda, S; Narayan, A; Nelyubin, V; Norum, B; Oh, Y; Osipenko, M; Parno, D; Peng, J C; Phillips, S K; Posik, M; Puckett, A.J. R; Qiang, Y; Rakhman, A; Ransome, R D; Riordan, S; Saha, A; Sawatzky, B; Schulte, E; Shahinyan, A; Shabestari, M H; Sirca, S; Stepanyan, S; Subedi, R; Sulkosky, V; Tang, L -G; Tobias, A; Urciuoli, G M; Vilardi, I; Wang, K; Wojtsekhowski, B; Yan, X; Yao, H; Ye, Y; Ye, Z; Yuan, L; Zhan, X; Zhang, Y -W; Zhao, B; Zheng, X; Zhu, L; Zhu, X

    2012-01-30

    We report the first measurement of the double-spin asymmetry ALT for charged pion electroproduction in semi-inclusive deep inelastic electron scattering on a transversely polarized 3He target. The kinematics focused on the valence quark region, 0.16 2 2. The corresponding neutron ALT asymmetries were extracted from the measured 3He asymmetries and proton/3He cross section ratios using the effective polarization approximation. These new data probe the transverse momentum dependent parton distribution function gq and therefore provide access to quark spin-orbit correlations. Our results indicate a positive azimuthal asymmetry for ?- production on 3He and the neutron, while our ?+ asymmetries are consistent with zero.

  10. "control-Alt-Delete": Rebooting Solutions for the E-Waste Problem

    E-Print Network [OSTI]

    Li, J; Zeng, X; Chen, M; Ogunseitan, OA; Stevels, A

    2015-01-01

    B. An overview of e-waste management in China. J. Mater.Perspective of electronic waste management in China based onCRT) funnel glass waste management options in the United

  11. Real-time impluse-based rigid body simulation and rendering 

    E-Print Network [OSTI]

    Yuksel, Can

    2007-09-17

    The purpose of this thesis is to develop and demonstrate a physically based rigid body simulation with a focus on simplifications to achieve real-time performance. This thesis aims to demonstrate that by improving the efficiency with simplified...

  12. REAL-TIME DEPTH BOUNDARY OPTIMIZATION FOR LOCAL AREA-BASED STEREO David Gallup1

    E-Print Network [OSTI]

    Pollefeys, Marc

    a snake-like energy optimized with a dynamic programming method. This clean-up step requires only O(#pixels) time and space, making it well-suited for real-time where local area-based stereo is often used. Our depth estimates are needed immediately, or for processing large amounts of data as in urban

  13. A test for second order stationarity of a time series based on the Discrete Fourier Transform

    E-Print Network [OSTI]

    Subba Rao, Suhasini

    A test for second order stationarity of a time series based on the Discrete Fourier Transform property, we construct a Portmanteau type test statistic for testing stationarity of the time series. It is shown that under the null of stationarity, the test statistic is approximately a chi square distribution

  14. AN E-BASED MIXED FORMULATION FOR A TIME-DEPENDENT EDDY CURRENT PROBLEM

    E-Print Network [OSTI]

    Rodríguez, Rodolfo

    AN E-BASED MIXED FORMULATION FOR A TIME-DEPENDENT EDDY CURRENT PROBLEM RAMIRO ACEVEDO, SALIM-quasistatic submodel usually called eddy current problem; see for instance [9, Chapter 8]. From the mathematical point this harmonic behavior, leading to the so-called time-harmonic eddy current problem. However, even in the case

  15. FPGA-Based Fuzzy Inference System for Real-time Embedded Applications

    E-Print Network [OSTI]

    FPGA-Based Fuzzy Inference System for Real-time Embedded Applications Dr. Kasim M. Al:- The traditional way of implementing algorithms in software limits the performance of real-time systems, since the data is processed serially. The new generation of FPGAs with embedded processors are attracting

  16. Real-Time Pricing for Demand Response Based on Stochastic Approximation

    E-Print Network [OSTI]

    Wong, Vincent

    1 Real-Time Pricing for Demand Response Based on Stochastic Approximation Pedram Samadi, Student to reduce their energy expenses. Keywords: Demand response, real-time pricing, PAR minimiza- tion, stochastic approximation, simultaneous perturbation. I. INTRODUCTION Demand response (DR) is an important

  17. Damage mechanisms identification of polymer based composite materials: time-frequency investigation of

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Damage mechanisms identification of polymer based composite materials: time-frequency investigation 2012, Nantes, France 2045 #12;Presented in this paper, a time-frequency damage characterization Emission (AE) signals by the Hilbert-Huang transform (HHT). It is to be noted that the study of damage

  18. TOWARDS REAL-TIME METADATA FOR SENSOR-BASED NETWORKS AND GEOGRAPHIC DATABASES

    E-Print Network [OSTI]

    Servigne, Sylvie

    TOWARDS REAL-TIME METADATA FOR SENSOR-BASED NETWORKS AND GEOGRAPHIC DATABASES C. Gutiérrez, S: Metadata, Sensor database, SpatioTemporal, Data Quality, GIS ABSTRACT: Nowadays, the geographic metadata of spatiotemporal data resulting from these sensors requires a definition of real- time metadata, especially

  19. Event History Based Sparse State Saving in Time Warp* Francesco Quaglia

    E-Print Network [OSTI]

    Tropper, Carl

    Event History Based Sparse State Saving in Time Warp* Francesco Quaglia Dipartimento di Informatica@dis.uniromal.it Abstract This paper presents a sparse state saving scheme for Time Warp parallel discrete event simulation with well known checkpointing schemes such as copy, sparse and incremental state saving (recently schemes

  20. Time-Based Storage Bandwidth Allocation in Hybrid Storage Systems Rice University

    E-Print Network [OSTI]

    Time-Based Storage Bandwidth Allocation in Hybrid Storage Systems Hui Wang Rice University Peter for a hybrid storage system made up of both HDs and SSDs. To continue the example, suppose the HD has slicing treats the storage system as a black box and dedicates the system to a client for its time slice

  1. A Wireless Internet-Based Observatory: The Real-time Coastal Observation Network

    E-Print Network [OSTI]

    A Wireless Internet-Based Observatory: The Real-time Coastal Observation Network (ReCON) S. A community and educational institutions through the internet. A real-time database management system provides to the success of regional coastal ocean observing systems. The pervasiveness of wireless internet technology

  2. Lyapunov based continuous-time nonlinear controller redesign for sampled-data implementation

    E-Print Network [OSTI]

    Nesic, Dragan

    Lyapunov based continuous-time nonlinear controller redesign for sampled-data implementation, 2004 Abstract: Given a continuous-time controller and a Lyapunov function that shows global asymptotic the sampling period T) of the Lyapunov difference for the sampled-data system with the redesigned controller

  3. Aalborg Universitet ARIMA-Based Time Series Model of Stochastic Wind Power Generation

    E-Print Network [OSTI]

    Bak-Jensen, Birgitte

    the nonstationarity and physical limits of stochastic wind power generation. The model is constructed based on wind power measurement of one year from the Nysted offshore wind farm in Denmark. The proposed limitedAalborg Universitet ARIMA-Based Time Series Model of Stochastic Wind Power Generation Chen, Peiyuan

  4. DAMAGE DETECTION IN A WIND TURBINE BLADE BASED ON TIME SERIES Simon Hoell, Piotr Omenzetter

    E-Print Network [OSTI]

    Boyer, Edmond

    DAMAGE DETECTION IN A WIND TURBINE BLADE BASED ON TIME SERIES METHODS Simon Hoell, Piotr Omenzetter (SHM) systems. Different methods have been developed for detection of damages in WT blades. However a damage detection method based on autocorrelations of response accelerations. The damage sensitive feature

  5. Fully adaptive FEM based fluorescence optical tomography from time-dependent measurements with area illumination

    E-Print Network [OSTI]

    Bangerth, Wolfgang

    Fully adaptive FEM based fluorescence optical tomography from time-dependent measurements with area fluorescence absorption map with an adaptive finite element based scheme. The tissue phantom consisted 785 nm diode laser light and a gain modulated image intensified charge coupled device camera

  6. WEtransport: A Context-based Ride Sharing Platform Alireza Sahami Shirazi, Thomas Kubitza, Florian Alt, Bastian Pfleging, Albrecht Schmidt

    E-Print Network [OSTI]

    - and client-side expansion due to the modular platform structure. Author Keywords ride sharing, ticket sharing, Economics INTRODUCTION Urban areas nowadays often suffer from high traffic volumes especially during rush hour. Despite resulting problems such as air pollution, traffic jams, and high fuel prices, conven

  7. Asymmetric poly(ethylene-alt-propylene)-poly(ethylene oxide) micelles: A system with starlike morphology and interactions

    SciTech Connect (OSTI)

    Laurati, M.; Stellbrink, J.; Lund, R.; Willner, L.; Richter, D. [Institut fuer Festkoerperforschung, Forschungszentrum Juelich, 52425 Juelich (Germany); Zaccarelli, E. [Dipartimento di Fisica and INFM-CRS SOFT, Universita di Roma La Sapienza, Piazza A. Moro 2, I-00185, Roma (Italy)

    2007-10-15

    We report on an experimental study of single particle properties and interactions of poly(ethylene-alt-propylene)-poly(ethylene oxide) (PEP-PEO) starlike micelles. The starlike regime is achieved by an extremely asymmetric block ratio (1:20) and the number of arms (functionality) is changed by varying the composition of the solvent (the interfacial tension). Small angle neutron scattering (SANS) data in the dilute regime can be modeled by assuming a constant density profile in the micellar core (compact core) and a starlike density profile in the corona (starlike shell). The starlike morphology of the corona is confirmed by a direct comparison with SANS measurements of dilute poly butadiene star solutions. Comparison of structure factors obtained by SANS measurements in the concentrated regime shows in addition that the interactions in the two systems are equivalent. Micellar structure factors at several packing fractions can be modeled by using the ultrasoft potential recently proposed for star polymers [Likos et al., Phys. Rev. Lett. 80, 4450 (1998)]. The experimental phase diagram of PEP-PEO micelles is quantitatively compared to theoretical expectations, finding good agreement for the location of the liquid-solid boundary and excellent agreement for the critical packing fraction where the liquid-to-bcc crystal transition takes place for f<70. The functionality, i.e., the coronal density, strongly influences the nature of the solid phase: for f<70 the system crystallizes into a bcc phase, high f>70 formation of amorphous arrested states prevents crystallization.

  8. Discrimination and Visualization of ELM Types Based on a Probabilistic Description of Inter-ELM Waiting Times

    E-Print Network [OSTI]

    Discrimination and Visualization of ELM Types Based on a Probabilistic Description of Inter-ELM Waiting Times

  9. New noise-based logic representations to avoid some problems with time complexity

    E-Print Network [OSTI]

    H. Wen; L. B. Kish; A. Klappenecker; F. Peper

    2012-01-07

    Instantaneous noise-based logic can avoid time-averaging, which implies significant potential for low-power parallel operations in beyond-Moore-law-chips. However, the universe (uniform superposition) will be zero with high probability (non-zero with exponentially low probability) in the random-telegraph-wave representation thus the operations with the universe would require exponential time-complexity. To fix this deficiency, we modify the amplitudes of the signals of the L and H states and achieve an exponential speedup compared to the old situation. Another improvement concerns the identification of a single product (hyperspace) state. We introduce a time shifted noise-based logic, which is constructed by shifting each reference signal with a small time delay. This modification implies an exponential speedup of single hyperspace vector identification compared to the former case and it requires the same, O(N) complexity as in quantum computing.

  10. Real-time capable first principle based modelling of tokamak turbulent transport

    E-Print Network [OSTI]

    Breton, S; Felici, F; Imbeaux, F; Aniel, T; Artaud, J F; Baiocchi, B; Bourdelle, C; Camenen, Y; Garcia, J

    2015-01-01

    A real-time capable core turbulence tokamak transport model is developed. This model is constructed from the regularized nonlinear regression of quasilinear gyrokinetic transport code output. The regression is performed with a multilayer perceptron neural network. The transport code input for the neural network training set consists of five dimensions, and is limited to adiabatic electrons. The neural network model successfully reproduces transport fluxes predicted by the original quasilinear model, while gaining five orders of magnitude in computation time. The model is implemented in a real-time capable tokamak simulator, and simulates a 300s ITER discharge in 10s. This proof-of-principle for regression based transport models anticipates a significant widening of input space dimensionality and physics realism for future training sets. This aims to provide unprecedented computational speed coupled with first-principle based physics for real-time control and integrated modelling applications.

  11. A software based, 13 kbits/s real-time internet codec 

    E-Print Network [OSTI]

    Randolph, Marc A

    1996-01-01

    . Quadrature Mirror Filters C. Polyphase quadrature mirror filters D. Infinite impulse response based QMF E. Subband choice SYSTEM DESIGN A. Overview. B. Quadrature Mirror Filter . . C. Speech coder 1. Predictor a. Pole-Zero predictor b. Pitch... Huffman code 29 38 VI Selected subband bit allocations . 40 VII Time spent filtering VIII Total delay time 41 47 LIST OF FIGURES FIGURE Page Block diagram of the ADPCM encoder Block diagram of the ADPCM decoder 13 Example speech samples 14...

  12. A Novel Priority-Slot Based Continuous-Time Formulation for Crude-Oil Scheduling Problems

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    A Novel Priority-Slot Based Continuous-Time Formulation for Crude-Oil Scheduling Problems Sylvain, France E-mail: grossmann@cmu.edu October 2008 Abstract The optimal scheduling of crude-oil operations be used to solve the crude-oil operations problem introduced by Lee et al. 1 . It is different from

  13. Time Variability-Based Hierarchic Recognition of Multiple Musical Instruments in Recordings

    E-Print Network [OSTI]

    Ras, Zbigniew W.

    Chapter 15 Time Variability-Based Hierarchic Recognition of Multiple Musical Instruments in this chapter is focused on automatic identifica- tion of musical instruments in polyphonic audio recordings pres- ence or absence of a target instrument. Feature set includes parameters describing frame

  14. A FIRST ORDER PROJECTION-BASED TIME-SPLITTING SCHEME FOR COMPUTING CHEMICALLY REACTING FLOWS

    E-Print Network [OSTI]

    A FIRST ORDER PROJECTION-BASED TIME-SPLITTING SCHEME FOR COMPUTING CHEMICALLY REACTING FLOWS, surface catalytic reactors for methane to methanol conversion and chemical vapor deposition (CVD) process ANDREAS PROHL1 Abstract. The simulation of chemically reacting ows in speci#12;c situations is a basic

  15. Toward Real-Time Simulation of Physics Based Lithium-Ion Battery Models

    E-Print Network [OSTI]

    Subramanian, Venkat

    Toward Real-Time Simulation of Physics Based Lithium-Ion Battery Models Venkat R. Subramanian Technological University, Cookeville, Tennessee 38505, USA Recent interest in lithium-ion batteries for electric on the computational efficiency of lithium-ion battery models. This paper presents an effective approach to simulate

  16. Efficient Block-Based Parameterized Timing Analysis Covering All Potentially Critical Paths

    E-Print Network [OSTI]

    Najm, Farid N.

    Efficient Block-Based Parameterized Timing Analysis Covering All Potentially Critical Paths Khaled in the parameter space, by reporting all paths that can become critical. Using an efficient pruning algorithm, only) but by knowledge of the paths that can become critical at nearby points in parameter space. We give a formal

  17. Optimal Real-time Pricing Algorithm Based on Utility Maximization for Smart Grid

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Optimal Real-time Pricing Algorithm Based on Utility Maximization for Smart Grid Pedram Samadi algorithm for the future smart grid. We focus on the interactions between the smart meters and the energy-mail:{psamadi, hamed, rschober, vincentw, jurij}@ece.ubc.ca Abstract--In this paper, we consider a smart power infras

  18. NUMERICAL SOLUTION OF RESERVOIR FLOW MODELS BASED ON LARGE TIME STEP OPERATOR SPLITTING ALGORITHMS

    E-Print Network [OSTI]

    NUMERICAL SOLUTION OF RESERVOIR FLOW MODELS BASED ON LARGE TIME STEP OPERATOR SPLITTING ALGORITHMS. Special focus is posed on the numerical solution algorithms for the saturation equation, which. The general background for the reservoir ow model is reviewed, and the main features of the numerical

  19. NUMERICAL SOLUTION OF RESERVOIR FLOW MODELS BASED ON LARGE TIME STEP OPERATOR SPLITTING ALGORITHMS

    E-Print Network [OSTI]

    NUMERICAL SOLUTION OF RESERVOIR FLOW MODELS BASED ON LARGE TIME STEP OPERATOR SPLITTING ALGORITHMS focus is posed on the numerical solution algorithms for the saturation equation, which is a convection­ eral background for the reservoir flow model is reviewed, and the main features of the numerical

  20. Delay-Based Controller Design for Continuous-Time and Hybrid Applications

    E-Print Network [OSTI]

    Murray, Richard M.

    results on delay-based controller design, we propose a digital-control scheme that can implement every://www.cds.caltech.edu/~murray/papers/lsm10-tac.html #12;2 structure of the controller being designed for a large-scale system. This problem been developed for the analysis and synthesis of time- delay control systems in the continuous

  1. Real-Time Model-Based Fault Diagnosis for Switching Power Converters

    E-Print Network [OSTI]

    Sanders, Seth

    demonstration for a 1.2 kW rack-level uninterruptable power supply (UPS) dc-dc converter for data center for a 1.2 kW rack- level uninterruptable power supply (UPS) dc-dc converter for data center applicationsReal-Time Model-Based Fault Diagnosis for Switching Power Converters Jason Poon, Ioannis C

  2. Discrete-time Lyapunov based small-gain theorem for parameterized interconnected ISS systems

    E-Print Network [OSTI]

    Nesic, Dragan

    Discrete-time Lyapunov based small-gain theorem for parameterized interconnected ISS systems Dina via the Lyapunov method. In particular, an ISS Lyapunov function for the overall system is constructed from the ISS Lyapunov functions of the two subsystems. We consider parameterized families of discrete

  3. 1. Event Structuring as a General Approach to Building Knowledge in Time-Based Collections

    E-Print Network [OSTI]

    Ras, Zbigniew W.

    Ribarsky The University of North Carolina at Charlotte Zachary Wartell The University of North Carolina at Charlotte Wenwen Dou The University of North Carolina at Charlotte Keywords Time-based data collections sequence forms a narrative, or story. Such stories are powerful me- chanisms for human understanding

  4. A Real-time Integration of Concept-based Search and Summarization on Chinese Websites

    E-Print Network [OSTI]

    engine, and an automatic summarizer. When the user enters one or more fairly general and vague terms query structure. They prefer limiting their searches to one or a simple list of terms, while seekingA Real-time Integration of Concept-based Search and Summarization on Chinese Websites Joe F Zhou

  5. COMET: A Component-Based Real-Time Database for Automotive Systems Dag Nystrom

    E-Print Network [OSTI]

    COMET: A Component-Based Real-Time Database for Automotive Systems Dag Nystr¨om , Aleksandra With the increase of complexity in automotive control systems, the amount of data that needs to be managed is also-constrained automotive control systems, denoted the COMET development suit. Using software engineer- ing tools to assist

  6. Spatio-temporal precipitation modeling based on time-varying regressions Oleg Makhnin

    E-Print Network [OSTI]

    Borchers, Brian

    Spatio-temporal precipitation modeling based on time-varying regressions Oleg Makhnin Department on monthly precipitation data from gauge measurements. The model accounts for orographic effects in northern New Mexico. We assess spatio-temporal variability and also trace the dependence of precipitation

  7. Beam-Target Double Spin Asymmetry ALT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized 3He Target at 1.422

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

    Meziani, Z -E; Michaels, R; Munoz Camacho, C; Nanda, S; Narayan, A; Nelyubin, V; Norum, B; Oh, Y; Osipenko, M; Parno, D; et al

    2012-01-30

    We report the first measurement of the double-spin asymmetry ALT for charged pion electroproduction in semi-inclusive deep inelastic electron scattering on a transversely polarized 3He target. The kinematics focused on the valence quark region, 0.16 2 2. The corresponding neutron ALT asymmetries were extracted from the measured 3He asymmetries and proton/3He cross section ratios using the effective polarization approximation. These new data probe the transverse momentum dependent parton distribution function gq and therefore provide access to quark spin-orbit correlations. Our results indicate a positive azimuthal asymmetry for ?- production onmore »3He and the neutron, while our ?+ asymmetries are consistent with zero.« less

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

    E-Print Network [OSTI]

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

    2015-01-01

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

  9. Holographic imaging based on time-domain data of natural-fiber-containing materials

    DOE Patents [OSTI]

    Bunch, Kyle J.; McMakin, Douglas L.

    2012-09-04

    Methods and apparatuses for imaging material properties in natural-fiber-containing materials can utilize time-domain data. In particular, images can be constructed that provide quantified measures of localized moisture content. For example, one or more antennas and at least one transceiver can be configured to collect time-domain data from radiation interacting with the natural-fiber-containing materials. The antennas and the transceivers are configured to transmit and receive electromagnetic radiation at one or more frequencies, which are between 50 MHz and 1 THz, according to a time-domain impulse function. A computing device is configured to transform the time-domain data to frequency-domain data, to apply a synthetic imaging algorithm for constructing a three-dimensional image of the natural-fiber-containing materials, and to provide a quantified measure of localized moisture content based on a pre-determined correlation of moisture content to frequency-domain data.

  10. A Cosmic Ray Test Platform Based on the High Time Resolution MRPC Technology

    E-Print Network [OSTI]

    Tianxiang Chen; Cheng Li; Yongjie Sun; Hongfang Chen; Ming Shao; Zebo Tang; Rongxing Yang; Yi Zhou; Yifei Zhang

    2015-03-13

    In order to test the performance of detector/prototype in environment of laboratory, we design and build a larger area ($90\\times52$ $cm^2$) test platform of cosmic ray based on well-designed Multi-gap Resistive Plate Chamber (MRPC) with an excellent time resolution and a high detection efficiency for the minimum ionizing particles (MIPs). The time resolution of the MRPC module used is tested to be ~80 ps, and the position resolution along the strip is ~5 mm, while the position resolution perpendicular to the strip is ~12.7 mm. The platform constructed by four MRPC modules can be functional for tracking the cosmic rays with a spatial resolution ~6.3 mm, and provide a reference time ~40 ps.

  11. Space-Time Models based on Random Fields with Local Interactions

    E-Print Network [OSTI]

    Dionissios T. Hristopulos; Ivi C. Tsantili

    2015-03-06

    The analysis of space-time data from complex, real-life phenomena requires the use of flexible and physically motivated covariance functions. In most cases, it is not possible to explicitly solve the equations of motion for the fields or the respective covariance functions. In the statistical literature, covariance functions are often based on mathematical constructions. We propose deriving space-time covariance functions by solving "effective equations of motion", which can be used as statistical representations of systems with diffusive behavior. In particular, we propose using the linear response theory to formulate space-time covariance functions based on an equilibrium effective Hamiltonian. The effective space-time dynamics are then generated by a stochastic perturbation around the equilibrium point of the classical field Hamiltonian leading to an associated Langevin equation. We employ a Hamiltonian which extends the classical Gaussian field theory by including a curvature term and leads to a diffusive Langevin equation. Finally, we derive new forms of space-time covariance functions.

  12. Time-Sensitive Utility-Based Routing in Duty-Cycle Wireless Sensor Networks with Unreliable Links

    E-Print Network [OSTI]

    Wu, Jie

    Time-Sensitive Utility-Based Routing in Duty-Cycle Wireless Sensor Networks with Unreliable Links}@ustc.edu.cn Abstract--Utility-based routing is a special routing approach, which takes the reliability and transmission costs into account at the same time. However, the existing utility-based routing algorithms have not yet

  13. Improving the Effectiveness of Time-Based Display Advertising DANIEL G. GOLDSTEIN and R. PRESTON MCAFEE and SIDDHARTH SURI,

    E-Print Network [OSTI]

    Fiat, Amos

    Improving the Effectiveness of Time-Based Display Advertising DANIEL G. GOLDSTEIN and R. PRESTON MCAFEE and SIDDHARTH SURI, Yahoo! Research Display advertisements are typically sold by the impression is more exact than one based solely on impressions, time- based advertising may become an industry

  14. Lie algebra solution of population models based on time-inhomogeneous Markov chains

    E-Print Network [OSTI]

    House, Thomas

    2011-01-01

    Many natural populations are well modelled through time-inhomogeneous stochastic processes. Such processes have been analysed in the physical sciences using a method based on Lie algebras, but this methodology is not widely used for models with ecological, medical and social applications. This paper presents the Lie algebraic method, and applies it to three biologically well motivated examples. The result of this is a solution form that is often highly computationally advantageous.

  15. Method and computer product to increase accuracy of time-based software verification for sensor networks

    DOE Patents [OSTI]

    Foo Kune, Denis (Saint Paul, MN); Mahadevan, Karthikeyan (Mountain View, CA)

    2011-01-25

    A recursive verification protocol to reduce the time variance due to delays in the network by putting the subject node at most one hop from the verifier node provides for an efficient manner to test wireless sensor nodes. Since the software signatures are time based, recursive testing will give a much cleaner signal for positive verification of the software running on any one node in the sensor network. In this protocol, the main verifier checks its neighbor, who in turn checks its neighbor, and continuing this process until all nodes have been verified. This ensures minimum time delays for the software verification. Should a node fail the test, the software verification downstream is halted until an alternative path (one not including the failed node) is found. Utilizing techniques well known in the art, having a node tested twice, or not at all, can be avoided.

  16. A multiscale MDCT image-based breathing lung model with time-varying regional ventilation

    SciTech Connect (OSTI)

    Yin, Youbing, E-mail: youbing-yin@uiowa.edu [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States) [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States); IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City, IA 52242 (United States); Department of Radiology, The University of Iowa, Iowa City, IA 52242 (United States); Choi, Jiwoong, E-mail: jiwoong-choi@uiowa.edu [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States) [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States); IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City, IA 52242 (United States); Hoffman, Eric A., E-mail: eric-hoffman@uiowa.edu [Department of Radiology, The University of Iowa, Iowa City, IA 52242 (United States); Department of Biomedical Engineering, The University of Iowa, Iowa City, IA 52242 (United States); Department of Internal Medicine, The University of Iowa, Iowa City, IA 52242 (United States); Tawhai, Merryn H., E-mail: m.tawhai@auckland.ac.nz [Auckland Bioengineering Institute, The University of Auckland, Auckland (New Zealand); Lin, Ching-Long, E-mail: ching-long-lin@uiowa.edu [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States) [Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA 52242 (United States); IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City, IA 52242 (United States)

    2013-07-01

    A novel algorithm is presented that links local structural variables (regional ventilation and deforming central airways) to global function (total lung volume) in the lung over three imaged lung volumes, to derive a breathing lung model for computational fluid dynamics simulation. The algorithm constitutes the core of an integrative, image-based computational framework for subject-specific simulation of the breathing lung. For the first time, the algorithm is applied to three multi-detector row computed tomography (MDCT) volumetric lung images of the same individual. A key technique in linking global and local variables over multiple images is an in-house mass-preserving image registration method. Throughout breathing cycles, cubic interpolation is employed to ensure C{sub 1} continuity in constructing time-varying regional ventilation at the whole lung level, flow rate fractions exiting the terminal airways, and airway deformation. The imaged exit airway flow rate fractions are derived from regional ventilation with the aid of a three-dimensional (3D) and one-dimensional (1D) coupled airway tree that connects the airways to the alveolar tissue. An in-house parallel large-eddy simulation (LES) technique is adopted to capture turbulent-transitional-laminar flows in both normal and deep breathing conditions. The results obtained by the proposed algorithm when using three lung volume images are compared with those using only one or two volume images. The three-volume-based lung model produces physiologically-consistent time-varying pressure and ventilation distribution. The one-volume-based lung model under-predicts pressure drop and yields un-physiological lobar ventilation. The two-volume-based model can account for airway deformation and non-uniform regional ventilation to some extent, but does not capture the non-linear features of the lung.

  17. Bayesian based design of real-time sensor systems for high-risk indoor contaminants

    SciTech Connect (OSTI)

    Sreedharan, Priya; Sreedharan, Priya

    2007-12-01

    The sudden release of toxic contaminants that reach indoor spaces can be hazardousto building occupants. To respond effectively, the contaminant release must be quicklydetected and characterized to determine unobserved parameters, such as release locationand strength. Characterizing the release requires solving an inverse problem. Designinga robust real-time sensor system that solves the inverse problem is challenging becausethe fate and transport of contaminants is complex, sensor information is limited andimperfect, and real-time estimation is computationally constrained.This dissertation uses a system-level approach, based on a Bayes Monte Carloframework, to develop sensor-system design concepts and methods. I describe threeinvestigations that explore complex relationships among sensors, network architecture,interpretation algorithms, and system performance. The investigations use data obtainedfrom tracer gas experiments conducted in a real building. The influence of individual sensor characteristics on the sensor-system performance for binary-type contaminant sensors is analyzed. Performance tradeoffs among sensor accuracy, threshold level and response time are identified; these attributes could not be inferred without a system-level analysis. For example, more accurate but slower sensors are found to outperform less accurate but faster sensors. Secondly, I investigate how the sensor-system performance can be understood in terms of contaminant transport processes and the model representation that is used to solve the inverse problem. The determination of release location and mass are shown to be related to and constrained by transport and mixing time scales. These time scales explain performance differences among different sensor networks. For example, the effect of longer sensor response times is comparably less for releases with longer mixing time scales. The third investigation explores how information fusion from heterogeneous sensors may improve the sensor-system performance and offset the need for more contaminant sensors. Physics- and algorithm-based frameworks are presented for selecting and fusing information from noncontaminant sensors. The frameworks are demonstrated with door-position sensors, which are found to be more useful in natural airflow conditions, but which cannot compensate for poor placement of contaminant sensors. The concepts and empirical findings have the potential to help in the design of sensor systems for more complex building systems. The research has broader relevance to additional environmental monitoring problems, fault detection and diagnostics, and system design.

  18. 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.

  19. Time-resolved fuel injector flow characterisation based on 3D laser Doppler vibrometry

    E-Print Network [OSTI]

    Crua, Cyril

    2015-01-01

    In order to enable investigations of the fuel flow inside unmodified injectors, we have developed a new experimental approach to measure time-resolved vibration spectra of diesel nozzles using a three dimensional laser vibrometer. The technique we propose is based on the triangulation of the vibrometer and fuel pressure transducer signals, and enables the quantitative characterisation of quasi-cyclic internal flows without requiring modifications to the injector, the working fluid, or limiting the fuel injection pressure. The vibrometer, which uses the Doppler effect to measure the velocity of a vibrating object, was used to scan injector nozzle tips during the injection event. The data were processed using a discrete Fourier transform to provide time-resolved spectra for valve-closed-orifice, minisac and microsac nozzle geometries, and injection pressures ranging from 60 to 160MPa, hence offering unprecedented insight into cyclic cavitation and internal mechanical dynamic processes. A peak was consistently f...

  20. An architecture for real time circle detection based on the Hough transform 

    E-Print Network [OSTI]

    Salem, Sanjay S.

    1992-01-01

    ) Hosame Abu-Amara (Member) , L~tr4+m'~gyy N. Kehtarnav (Member) . C. Jenkins (Member) J. W. Howze (Head of Department) May 1992 ABSTRACT An Architecture for Real Time Circle Detection Based on the Hough Transform. (1UIay 1992) Sanjay S Salem... Segmentation B. Image processing architectures 1. Parallel Architectures 2. Serial Architecture C. Overview of the Thesis I 2 2 4 5 6 7 8 THEORETICAL BACKGROUND 10 A. EIough transform 1. Line detection using Hough Transform . 2. Circle detection...

  1. A Data-Centric Approach to Optimize Time in Workflow-Based Business Process Yuqun Zhang, Dewayne E. Perry

    E-Print Network [OSTI]

    Perry, Dewayne E.

    A Data-Centric Approach to Optimize Time in Workflow-Based Business Process Yuqun Zhang, Dewayne E to optimize it in workflow- based business processes. By applying our data-centric business process modeling-time performance, data-centric, business process optimization I. INTRODUCTION In the realm of business process

  2. 1822 IEEE TRANSACTIONS ON SMART GRID, VOL. 3, NO. 4, DECEMBER 2012 Real-Time Price-Based Demand Response

    E-Print Network [OSTI]

    Fu, Yong

    , real-time price-based demand response management, residential appli- ances, robust optimization1822 IEEE TRANSACTIONS ON SMART GRID, VOL. 3, NO. 4, DECEMBER 2012 Real-Time Price-Based Demand Response Management for Residential Appliances via Stochastic Optimization and Robust Optimization Zhi Chen

  3. Developing Embedded/Real-Time and Cyber-Physical Systems: Functional Reactive Programming, RTL-based Formal Verification, Response Time

    E-Print Network [OSTI]

    Cheng, Albert M. K.

    of such systems. In battery-operated real-time systems such as sensors in a CPS, conserving energy is of critical between battery recharges or energy-harvesting. This tutorial covers the following topics: (1 in Computer Science, graduating Phi Beta Kappa at age 19, the M.S. in Computer Science with a minor

  4. 1258 IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. 32, NO. 7, JULY 2013 GPU-Based Real-Time Volumetric Ultrasound

    E-Print Network [OSTI]

    Khuri-Yakub, Butrus T. "Pierre"

    1258 IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. 32, NO. 7, JULY 2013 GPU-Based Real-Time Volumetric-time volumetric imaging with a ring array, a particularly at- tractive geometry in intracardiac and intravascular), maximum intensity pro- jection (MIP), real-time imaging, ring array, ultrasound imaging, volumetric

  5. Raman Based Process Monitor For Continuous Real-Time Analysis Of High Level Radioactive Waste Components

    SciTech Connect (OSTI)

    Bryan, Samuel A.; Levitskaia, Tatiana G.; Schlahta, Stephan N.

    2008-05-27

    ABSTRACT A new monitoring system was developed at Pacific Northwest National Laboratory (PNNL) to quickly generate real-time data/analysis to facilitate a timely response to the dynamic characteristics of a radioactive high level waste stream. The developed process monitor features Raman and Coriolis/conductivity instrumentation configured for the remote monitoring, MatLab-based chemometric data processing, and comprehensive software for data acquisition/storage/archiving/display. The monitoring system is capable of simultaneously and continuously quantifying the levels of all the chemically significant anions within the waste stream including nitrate, nitrite, phosphate, carbonate, chromate, hydroxide, sulfate, and aluminate. The total sodium ion concentration was also determined independently by modeling inputs from on-line conductivity and density meters. In addition to the chemical information, this monitoring system provides immediate real-time data on the flow parameters, such as flow rate and temperature, and cumulative mass/volume of the retrieved waste stream. The components and analytical tools of the new process monitor can be tailored for a variety of complex mixtures in chemically harsh environments, such as pulp and paper processing liquids, electroplating solutions, and radioactive tank wastes. The developed monitoring system was tested for acceptability before it was deployed for use in Hanford Tank S-109 retrieval activities. The acceptance tests included performance inspection of hardware, software, and chemometric data analysis to determine the expected measurement accuracy for the different chemical species that are encountered during S-109 retrieval.

  6. Raman Based Process Monitor for Continuous Real-Time Analysis Of High Level Radioactive Waste Components

    SciTech Connect (OSTI)

    Bryan, S.; Levitskaia, T.; Schlahta, St. [Pacific Northwest National Laboratory, Richland, Washington (United States)

    2008-07-01

    A new monitoring system was developed at Pacific Northwest National Laboratory (PNNL) to quickly generate real-time data/analysis to facilitate a timely response to the dynamic characteristics of a radioactive high level waste stream. The developed process monitor features Raman and Coriolis/conductivity instrumentation configured for the remote monitoring, MatLab-based chemometric data processing, and comprehensive software for data acquisition/storage/archiving/display. The monitoring system is capable of simultaneously and continuously quantifying the levels of all the chemically significant anions within the waste stream including nitrate, nitrite, phosphate, carbonate, chromate, hydroxide, sulfate, and aluminate. The total sodium ion concentration was also determined independently by modeling inputs from on-line conductivity and density meters. In addition to the chemical information, this monitoring system provides immediate real-time data on the flow parameters, such as flow rate and temperature, and cumulative mass/volume of the retrieved waste stream. The components and analytical tools of the new process monitor can be tailored for a variety of complex mixtures in chemically harsh environments, such as pulp and paper processing liquids, electroplating solutions, and radioactive tank wastes. The developed monitoring system was tested for acceptability before it was deployed for use in Hanford Tank S-109 retrieval activities. The acceptance tests included performance inspection of hardware, software, and chemometric data analysis to determine the expected measurement accuracy for the different chemical species that are encountered during S-109 retrieval. (authors)

  7. Stochastic Model Based Proxy Servers Architecture for VoD to Achieve Reduced Client Waiting Time

    E-Print Network [OSTI]

    Nair, T R GopalaKrishnan

    2010-01-01

    In a video on demand system, the main video repository may be far away from the user and generally has limited streaming capacities. Since a high quality video's size is huge, it requires high bandwidth for streaming over the internet. In order to achieve a higher video hit ratio, reduced client waiting time, distributed server's architecture can be used, in which multiple local servers are placed close to clients and, based on their regional demands video contents are cached dynamically from the main server. As the cost of proxy server is decreasing and demand for reduced waiting time is increasing day by day, newer architectures are explored, innovative schemes are arrived at. In this paper we present novel 3 layer architecture, includes main multimedia server, a Tracker and Proxy servers. This architecture targets to optimize the client waiting time. We also propose an efficient prefix caching and load sharing algorithm at the proxy server to allocate the cache according to regional popularity of the video...

  8. Real-time Shape-based Particle Separation and Detailed In-situ Particle Shape Characterization

    SciTech Connect (OSTI)

    Beranek, Josef; Imre, D.; Zelenyuk, Alla

    2012-02-07

    Particle shape is an important attribute that is very difficult to characterize. We present a new portable system that offers, for the first time, the opportunity to separate particles with different shapes and characterize their chemical and physical properties, including their dynamic shape factors (DSFs) in the transition and free-molecular regimes, with high precision, in-situ, and in real-time. The system uses a new generation aerosol particle mass analyzer (APM) to classify particles based on their masses and transport them to a differential mobility analyzer (DMA) that is used to select particles of one charge, one mass, and one shape. These highly uniform particles are ready for use and/or characterization by any application or analytical tool. We combine APM and DMA with our single particle mass spectrometer, SPLAT II, to form the ADS, and demonstrate its utility to measure in real-time individual particle compositions and vacuum aerodynamic diameters to yield, for each selected shape, particle DSFs in two flow regimes. We apply the ADS to characterize aspherical ammonium sulfate and NaCl particles and show that both particle types have wide distribution of particle shapes with DSFs from nearly 1 to 1.5.

  9. Hacking energy-time entanglement-based systems with classical light

    E-Print Network [OSTI]

    Jonathan Jogenfors; Ashraf M. Elhassan; Johan Ahrens; Mohamed Bourennane; Jan-Åke Larsson

    2014-11-26

    Photonic systems based on energy-time entanglement have been proposed to test local realism using the Bell inequality. A violation of this inequality normally also certifies security of device-independent quantum key distribution, so that an attacker cannot eavesdrop or control the system. Here, we show how this security test can be circumvented in energy-time entangled systems when using standard avalanche photodetectors, allowing an attacker to compromise the system without leaving a trace. With tailored pulses of classical light we reach Bell values up to 3.63 at 97.6% detector efficiency which is an extreme violation. This is the first demonstration of a violation-faking source that both gives tunable violation and high detector efficiency. The implications are severe: the standard Clauser-Horne-Shimony-Holt inequality cannot be used to show device-independent security for standard postselecting energy-time entanglement setups. We conclude with suggestions of improved tests and experimental setups that can re-establish device-independent security.

  10. Real-time Bacterial Detection by Single Cell Based Sensors UsingSynchrotron FTIR Spectromicroscopy

    SciTech Connect (OSTI)

    Veiseh, Mandana; Veiseh, Omid; Martin, Michael C.; Bertozzi,Carolyn; Zhang, Miqin

    2005-08-10

    Microarrays of single macrophage cell based sensors weredeveloped and demonstrated for real time bacterium detection bysynchrotron FTIR microscopy. The cells were patterned on gold-SiO2substrates via a surface engineering technique by which the goldelectrodes were immobilized with fibronectin to mediate cell adhesion andthe silicon oxide background were passivated with PEG to resist proteinadsorption and cell adhesion. Cellular morphology and IR spectra ofsingle, double, and triple cells on gold electrodes exposed tolipopolysaccharide (LPS) of different concentrations were compared toreveal the detection capabilities of these biosensors. The single-cellbased sensors were found to generate the most significant IR wave numbervariation and thus provide the highest detection sensitivity. Changes inmorphology and IR spectrum for single cells exposed to LPS were found tobe time- and concentration-dependent and correlated with each other verywell. FTIR spectra from single cell arrays of gold electrodes withsurface area of 25 mu-m2, 100 mu-m2, and 400 mu-m2 were acquired usingboth synchrotron and conventional FTIR spectromicroscopes to study thesensitivity of detection. The results indicated that the developedsingle-cell platform can be used with conventional FTIRspectromicroscopy. This technique provides real-time, label-free, andrapid bacterial detection, and may allow for statistic and highthroughput analyses, and portability.

  11. Frequency decoding of periodically timed action potentials through distinct activity patterns in a random neural network

    E-Print Network [OSTI]

    Reichenbach, Tobias

    2015-01-01

    Frequency discrimination is a fundamental task of the auditory system. The mammalian inner ear, or cochlea, provides a place code in which different frequencies are detected at different spatial locations. However, a temporal code based on spike timing is also available: action potentials evoked in an auditory-nerve fiber by a low-frequency tone occur at a preferred phase of the stimulus-they exhibit phase locking-and thus provide temporal information about the tone's frequency. In an accompanying psychoacoustic study, and in agreement with previous experiments, we show that humans employ this temporal information for discrimination of low frequencies. How might such temporal information be read out in the brain? Here we demonstrate that recurrent random neural networks in which connections between neurons introduce characteristic time delays, and in which neurons require temporally coinciding inputs for spike initiation, can perform sharp frequency discrimination when stimulated with phase-locked inputs. Alt...

  12. Symmetric Ternary Quantum Homomorphic Encryption Schemes Based on the Ternary Quantum One-Time Pad

    E-Print Network [OSTI]

    Yuqi Wang; Kun She; Qingbin Luo; Fan Yang; Chao Zhao

    2015-05-12

    Aiming at a ternary quantum logic circuit, four symmetric ternary quantum homomorphic encryption schemes, based on ternary quantum one-time protocol, were presented. First, for a one-qutrit rotation gate, a homomorphic quantum encryption scheme was constructed. Second, in view of the synthesis of a 3x3 general unitary transformation, another one-qutrit quantum homomorphic encryption scheme was proposed. Third, according to the one-qutrit scheme, the two-qutrit quantum homomorphic encryption scheme about GCX(m') gate was constructed and was further generalized to the n-qutrit unitary matrix case. Finally, the security of these schemes was analyzed from two perspectives. It could be concluded that the attacker can correctly guess the encryption key with a maximum probability ${p_k} = {1 \\mathord{\\left/ {\\vphantom {1 {{3^{3n}}}}} \\right. \\kern-\

  13. Optimization Based Data Mining Approah for Forecasting Real-Time Energy Demand

    SciTech Connect (OSTI)

    Omitaomu, Olufemi A; Li, Xueping; Zhou, Shengchao

    2015-01-01

    The worldwide concern over environmental degradation, increasing pressure on electric utility companies to meet peak energy demand, and the requirement to avoid purchasing power from the real-time energy market are motivating the utility companies to explore new approaches for forecasting energy demand. Until now, most approaches for forecasting energy demand rely on monthly electrical consumption data. The emergence of smart meters data is changing the data space for electric utility companies, and creating opportunities for utility companies to collect and analyze energy consumption data at a much finer temporal resolution of at least 15-minutes interval. While the data granularity provided by smart meters is important, there are still other challenges in forecasting energy demand; these challenges include lack of information about appliances usage and occupants behavior. Consequently, in this paper, we develop an optimization based data mining approach for forecasting real-time energy demand using smart meters data. The objective of our approach is to develop a robust estimation of energy demand without access to these other building and behavior data. Specifically, the forecasting problem is formulated as a quadratic programming problem and solved using the so-called support vector machine (SVM) technique in an online setting. The parameters of the SVM technique are optimized using simulated annealing approach. The proposed approach is applied to hourly smart meters data for several residential customers over several days.

  14. Real-time data acquisition and telemetry based irrigation control system

    DOE Patents [OSTI]

    Slater, John M.; Svoboda, John M.

    2005-12-13

    A data acquisition and telemetry based control system for use in facilitating substantially real time management of an agricultural irrigation system. The soil moisture sensor includes a reader and a plurality of probes. The probes each include an electronic circuit having a moisture sensing capacitor in operative communication with the soil whose moisture is to be measured. Each probe also includes a receive/transmit antenna and the reader includes a transmit/receive antenna, so that as the reader passes near the probe, the reader transmits a digital excitation signal to the electronic circuit of the biodegradable probe via an inductive couple formed between the transmit/receive antenna of the reader and the receive/transmit coil of the probe. The electronic circuit uses an energy component of the excitation signal to generate a digital data signal which indicates the moisture content of the soil adjacent to the moisture sensing capacitor. The probe sends the data signal to the reader which then uses the data signal to develop a corresponding set of watering instructions which are then transmitted to a control module in communication with the irrigation system. The control module sends corresponding control signals to nozzles of the irrigation system causing the irrigation system to disperse water in a manner consistent with the moisture content data transmitted by the probes to the reader. Because the irrigation system moves continuously through the field to be irrigated, the moisture content data acquisition and resultant water dispersal by the irrigation system occur substantially in real time.

  15. Risk-based evaluation of Allowed Outage Times (AOTs) considering risk of shutdown

    SciTech Connect (OSTI)

    Mankamo, T.; Kim, I.S.; Samanta, P.K.

    1992-12-31

    When safety systems fail during power operation, Technical Specifications (TS) usually limit the repair within Allowed Outage Time (AOT). If the repair cannot be completed within the AOT, or no AOT is allowed, the plant is required to be shut down for the repair. However, if the capability to remove decay heat is degraded, shutting down the plant with the need to operate the affected decay-heat removal systems may impose a substantial risk compared to continued power operation over a usual repair time. Thus, defining a proper AOT in such situations can be considered as a risk-comparison between the repair in frill power state with a temporarily increased level of risk, and the altemative of shutting down the plant for the repair in zero power state with a specific associated risk. The methodology of the risk-comparison approach, with a due consideration of the shutdown risk, has been further developed and applied to the AOT considerations of residual heat removal and standby service water systems of a boiling water reactor (BWR) plant. Based on the completed work, several improvements to the TS requirements for the systems studied can be suggested.

  16. Risk-based evaluation of Allowed Outage Times (AOTs) considering risk of shutdown

    SciTech Connect (OSTI)

    Mankamo, T. ); Kim, I.S.; Samanta, P.K. )

    1992-01-01

    When safety systems fail during power operation, Technical Specifications (TS) usually limit the repair within Allowed Outage Time (AOT). If the repair cannot be completed within the AOT, or no AOT is allowed, the plant is required to be shut down for the repair. However, if the capability to remove decay heat is degraded, shutting down the plant with the need to operate the affected decay-heat removal systems may impose a substantial risk compared to continued power operation over a usual repair time. Thus, defining a proper AOT in such situations can be considered as a risk-comparison between the repair in frill power state with a temporarily increased level of risk, and the altemative of shutting down the plant for the repair in zero power state with a specific associated risk. The methodology of the risk-comparison approach, with a due consideration of the shutdown risk, has been further developed and applied to the AOT considerations of residual heat removal and standby service water systems of a boiling water reactor (BWR) plant. Based on the completed work, several improvements to the TS requirements for the systems studied can be suggested.

  17. Time interval measurement device based on surface acoustic wave filter excitation, providing 1 ps precision and stability

    SciTech Connect (OSTI)

    Panek, Petr; Prochazka, Ivan [Institute of Photonics and Electronics, Academy of Sciences of the Czech Republic, Chaberska 57, 182 51 Prague (Czech Republic)

    2007-09-15

    This article deals with the time interval measurement device, which is based on a surface acoustic wave (SAW) filter as a time interpolator. The operating principle is based on the fact that a transversal SAW filter excited by a short pulse can generate a finite signal with highly suppressed spectra outside a narrow frequency band. If the responses to two excitations are sampled at clock ticks, they can be precisely reconstructed from a finite number of samples and then compared so as to determine the time interval between the two excitations. We have designed and constructed a two-channel time interval measurement device which allows independent timing of two events and evaluation of the time interval between them. The device has been constructed using commercially available components. The experimental results proved the concept. We have assessed the single-shot time interval measurement precision of 1.3 ps rms that corresponds to the time of arrival precision of 0.9 ps rms in each channel. The temperature drift of the measured time interval on temperature is lower than 0.5 ps/K, and the long term stability is better than {+-}0.2 ps/h. These are to our knowledge the best values reported for the time interval measurement device. The results are in good agreement with the error budget based on the theoretical analysis.

  18. Daily Time Step Simulation with a Priority Order Based Surface Water Allocation Model 

    E-Print Network [OSTI]

    Hoffpauir, Richard James

    2011-02-22

    Surface water availability models often use monthly simulation time steps for reasons of data availability, model parameter parsimony, and reduced computational time. Representing realistic streamflow variability, ...

  19. Evaluation of Response Time in Ethernet-based Automation Systems Galle Marsal, Bruno Denis, Jean-Marc Faure

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    design of automation systems including this kind of industrial Ethernet networks. 1. Introduction ManyEvaluation of Response Time in Ethernet-based Automation Systems Gaëlle Marsal, Bruno Denis, Jean@eit.uni-kl.de Abstract This paper presents a method to assess response time of automation system architectures including

  20. Abstract--A cam-based, shear force actuated electromechanical valve drive system offering variable valve timing in internal

    E-Print Network [OSTI]

    Perreault, Dave

    1 Abstract--A cam-based, shear force actuated electromechanical valve drive system offering variable valve timing in internal combustion engines was previously proposed and demonstrated. To transform, optimal cam design, nonlinear friction model, variable valve timing. I. INTRODUCTION espite their simple

  1. A test for second order stationarity of a time series based on the Discrete Fourier Transform -Technical report

    E-Print Network [OSTI]

    Subba Rao, Suhasini

    A test for second order stationarity of a time series based on the Discrete Fourier Transform stationary. Exploiting this important property, we construct a Portmanteau type test statistic for testing stationarity of the time series. It is shown that under the null of stationarity, the test statistic has

  2. PUSHING THE LIMITS OF GROUND-BASED PHOTOMETRIC PRECISION: SUBMILLIMAGNITUDE TIME-SERIES PHOTOMETRY OF THE OPEN CLUSTER NGC 6791

    E-Print Network [OSTI]

    Gaudi, B. Scott

    PUSHING THE LIMITS OF GROUND-BASED PHOTOMETRIC PRECISION: SUBMILLIMAGNITUDE TIME-SERIES PHOTOMETRY of this study was to demonstrate the ability to obtain very high precision photometry for a large number to obtain high-precision (millimagnitude, or less than 1%) time-series, optical and infrared photometry

  3. MIDWEST ISO CO-OPTIMIZATION BASED REAL-TIME DISPATCH AND PRICING OF ENERGY AND ANCILLARY SERVICES

    E-Print Network [OSTI]

    McCalley, James D.

    MIDWEST ISO CO-OPTIMIZATION BASED REAL-TIME DISPATCH AND PRICING OF ENERGY AND ANCILLARY SERVICES and ancillary service co-optimization is reported in this paper. The key components of Midwest ISO's real words ­ Real-time dispatch and pricing, LMP, Energy and ancillary service co-optimization, Intra

  4. Mesoscale variability in time series data: Satellite-based estimates for the U.S. JGOFS Bermuda Atlantic

    E-Print Network [OSTI]

    Mesoscale variability in time series data: Satellite-based estimates for the U.S. JGOFS Bermuda TOPEX/Poseidon­ERS-1/2) are used to characterize, statistically, the mesoscale variability about the U to better understand the contribution of mesoscale eddies to the time series record and the model- data

  5. Implementing very high-speed hierarchical MLP-based classification systems in real-time industrial environments

    E-Print Network [OSTI]

    Masulli, Francesco

    Implementing very high-speed hierarchical MLP-based classification systems in real-time industrial-Perceptron-based "tree architecture" even in very high-speed industrial classification problems. In particular, the paper 64 input ­ 128 hidden ­ 64 output MLP on-chip), it has been possible to build an industrial board

  6. Concatenative Text-to-Speech Synthesis Based on Prototype Waveform Interpolation (A Time Frequency Approach) 

    E-Print Network [OSTI]

    Morais, Edmilson; Taylor, Paul; Violaro, Fabio

    This paper presents some preliminary methods to apply the Time- Frequency Interpolation technique - TFI [3] to concatenative text-to-speech synthesis. The TFI technique described here is a pitch-synchronous time-frequency ...

  7. The Design of a Synthesis Tool for Interrupt-based Real Time Embedded Software

    E-Print Network [OSTI]

    Hsiung, Pao-Ann

    to accomplish some dedicated set of periodic tasks within real time deadlines. Some examples include avionics Thermometer with Microcontroller (DTM) and a Real-time Stepping Motor Control (RSMC) to demonstrate

  8. High-energy mechanical milling of poly(methyl methacrylate), polyisoprene and poly(ethylene-alt-propylene)

    E-Print Network [OSTI]

    High-energy mechanical milling of poly(methyl methacrylate), polyisoprene and poly November 1999; accepted 5 November 1999 Abstract High-energy mechanical milling has been performed on poly and subsequently narrows with increasing milling time. Solid-state mechanical milling promotes comparable decreases

  9. Model based approach to UXO imaging using the time domain electromagnetic method

    SciTech Connect (OSTI)

    Lavely, E.M.

    1999-04-01

    Time domain electromagnetic (TDEM) sensors have emerged as a field-worthy technology for UXO detection in a variety of geological and environmental settings. This success has been achieved with commercial equipment that was not optimized for UXO detection and discrimination. The TDEM response displays a rich spatial and temporal behavior which is not currently utilized. Therefore, in this paper the author describes a research program for enhancing the effectiveness of the TDEM method for UXO detection and imaging. Fundamental research is required in at least three major areas: (a) model based imaging capability i.e. the forward and inverse problem, (b) detector modeling and instrument design, and (c) target recognition and discrimination algorithms. These research problems are coupled and demand a unified treatment. For example: (1) the inverse solution depends on solution of the forward problem and knowledge of the instrument response; (2) instrument design with improved diagnostic power requires forward and inverse modeling capability; and (3) improved target recognition algorithms (such as neural nets) must be trained with data collected from the new instrument and with synthetic data computed using the forward model. Further, the design of the appropriate input and output layers of the net will be informed by the results of the forward and inverse modeling. A more fully developed model of the TDEM response would enable the joint inversion of data collected from multiple sensors (e.g., TDEM sensors and magnetometers). Finally, the author suggests that a complementary approach to joint inversions is the statistical recombination of data using principal component analysis. The decomposition into principal components is useful since the first principal component contains those features that are most strongly correlated from image to image.

  10. Physics-based Predictive Time Propagation Method for Monte Carlo Coupled Depletion Simulations 

    E-Print Network [OSTI]

    Johns, Jesse Merlin

    2014-12-18

    t Time v Neutron velocity x Solution vector C Delayed neutron precursor concentration Cx Fitting coefficient D Diffusion coefficient E Energy J Neutron surface current L Loss operator vi M Nuclide transmutation operator N Nuclide density matrix N Nuclide... neutron flux ? Neutron yield energy distribution ? Difference operator ? Macroscopic interaction probability ? Solid angle of neutron travel Subscripts d Delayed neutron f Fission neutron interaction vii f Final time i, k,m, n Nuclide index i Time step...

  11. Recent Advances in Wave Travel Time Based Methodology for Structural Health Monitoring

    E-Print Network [OSTI]

    Southern California, University of

    identify wave velocity profiles of vertically propagating shear and torsional waves through the building monitoring, seismic interferometry, wave travel time 1. INTRODUCTION The ability to monitor the health

  12. Determination of welding fume size with time using E7018 electrodes and A131B base metal 

    E-Print Network [OSTI]

    Owen, Richard James

    1976-01-01

    DETERMINATION OF WELDING FUME SIZE WITH TIME USING E7018 ELECTRODES AND A131B BASE METAL A Thesis by RICHARD JAMES OWEN Submitted to the Graduate College of Texas AILM University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE December 1976 Major Subject: Industrial Hygiene DETERMINATION OF WELDING FUME SIZE WITH TIME USING E7018 ELECTRODES AND Al 318 BASE METAL A Thesis by RICHARD JAMES OWEN Approved as to style and content by: Cha&rman of Comm t ad...

  13. Reel-to-Reel Characterization of Time-Based Phase Evolution in YBCO Coated Conductors

    E-Print Network [OSTI]

    and Renewable Energy as part of a DOE program to develop electric power technology Pioneering Science of conversion time with identical processing history. · Examine sample with R2R XRD and Raman. Pioneering" of YBCO · YBCO converted for various amounts of time under fixed processing conditions AND history: ­ 1

  14. Fuzzy adaptive connection admission control for real-time applications in ATM-based heterogeneous networks 

    E-Print Network [OSTI]

    Zhang, Ying-Bi

    1997-01-01

    of network is popular lately due to their cost-effectiveness, high bandwidth, and scalability. For real-time applications, the most crucial quality of service is to meet deadline requirement which means timely and correct message delivery within the pre...

  15. Bayesian based design of real-time sensor systems for high-risk indoor contaminants

    E-Print Network [OSTI]

    Sreedharan, Priya

    2007-01-01

    the influence of occupant behavior (Klepeis and Nazaroff,the influence of occupant behavior on room airflow patternslibrary based on occupant behavior and weather conditions.

  16. Real-time EEG processing based on Wavelet Transformation T. Malina, A. Folkers and U.G. Hofmann

    E-Print Network [OSTI]

    Lübeck, Universität zu

    - time in their respective energy bands. Due to constraints in DSP-based computing power, we have brain waves to command input devices [1]. However, physiological research at our university [4], strongly suggests that the macroscopic electric (i.e. EEG) state of a subject's brain influences

  17. Flood management in a complex river basin with a real-time decision support system based on hydrological forecasts

    E-Print Network [OSTI]

    Lenstra, Arjen K.

    ENAC/ Flood management in a complex river basin with a real-time decision support system based System MINDS proposes the optimal hydropower plants management for flood peak reduction PREDICTING FLOODS for population safety and! Computational program: Routing System MINERVE Run-off model Infiltration model

  18. Real-time implementation of a vision based automatic push button 

    E-Print Network [OSTI]

    Rajkotwala, Farida

    1996-01-01

    This thesis presents a real-time digital signal Processing (DSP) system to detect the presence of pedestrians waiting to cross an intersection. Such a system would improve both pedestrian and vehicle flow considering that ...

  19. A biophysically-based neuromorphic model of spike rate- and timing-dependent plasticity

    E-Print Network [OSTI]

    Rachmuth, Guy

    Current advances in neuromorphic engineering have made it possible to emulate complex neuronal ion channel and intracellular ionic dynamics in real time using highly compact and power-efficient complementary metal-oxide- ...

  20. Reliable GPS-Based Timing for Power Systems: A Multi-Layered Multi-Receiver Architecture

    E-Print Network [OSTI]

    Gao, Grace Xingxin

    measurement unit (PMU), also known as synchrophasor, is a device capable of measuring power system voltage a victim receiver's reported position, time, or both. In a future scenario where PMU data play

  1. Single photon continuous variable quantum key distribution based on energy-time uncertainty relation

    E-Print Network [OSTI]

    Bing Qi

    2006-02-20

    In previous quantum key distribution (QKD) protocols, information is encoded on either the discrete-variable of single-photon signal or continuous-variables of multi-photon signal. Here, we propose a new QKD protocol by encoding information on continuous-variables of a single photon. In this protocol, Alice randomly encodes her information on either the central frequency of a narrow-band single photon pulse or the time-delay of a broadband single photon pulse, while Bob randomly chooses to do either frequency measurement or time measurement. The security of this protocol rests on the energy-time uncertainty relation, which prevents Eve from simultaneously determining both frequency and time information with arbitrarily high resolution. In practice, this scheme may be more robust against various channel noises, such as polarization and phase fluctuations.

  2. A Maximum Likelihood Method with Penalty to Estimate Link Travel Time Based on Trip Itinerary Data 

    E-Print Network [OSTI]

    Zhong, Chujun

    2014-12-15

    Travel time is an important network performance measure. It is a challenging subject due to the fluctuations in traffic characteristics, such as traffic flow. This study proposes a maximum likelihood method with penalty ...

  3. The Case For Prediction-based Best-effort Real-time Systems

    E-Print Network [OSTI]

    Shewchuk, Jonathan

    be adjusted based on user-perceived quality. After defining this class of applications, we de- scribe by the Advanced Research Projects Agency and Rome Laboratory, Air Force Materiel Command, USAF, under agreement

  4. Robust GPS-Based Timing for Phasor Measurement Units: A Position-Information-

    E-Print Network [OSTI]

    Gao, Grace Xingxin

    . INTRODUCTION Invented in the 1980s, Phasor Measurement Units (PMU), also known as synchrophasors, are GPS based between measurements collected by SCADA and a PMU during disturbance in a power grid in Oklahoma [1]. GPS

  5. Extremum seeking-based optimization of high voltage converter modulator rise-time

    SciTech Connect (OSTI)

    Scheinker, Alexander; Bland, Michael; Krstic, Miroslav; Audia, Jeff

    2013-02-01

    We digitally implement an extremum seeking (ES) algorithm, which optimizes the rise time of the output voltage of a high voltage converter modulator (HVCM) at the Los Alamos Neutron Science Center (LANSCE) HVCM test stand by iteratively, simultaneously tuning the first 8 switching edges of each of the three phase drive waveforms (24 variables total). We achieve a 50 ?s rise time, which is reduction in half compared to the 100 ?s achieved at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Considering that HVCMs typically operate with an output voltage of 100 kV, with a 60Hz repetition rate, the 50 ?s rise time reduction will result in very significant energy savings. The ES algorithm will prove successful, despite the noisy measurements and cost calculations, confirming the theoretical results that the algorithm is not affected by noise whose frequency components are independent of the perturbing frequencies.

  6. Extremum seeking-based optimization of high voltage converter modulator rise-time

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

    Scheinker, Alexander; Bland, Michael; Krstic, Miroslav; Audia, Jeff

    2013-02-01

    We digitally implement an extremum seeking (ES) algorithm, which optimizes the rise time of the output voltage of a high voltage converter modulator (HVCM) at the Los Alamos Neutron Science Center (LANSCE) HVCM test stand by iteratively, simultaneously tuning the first 8 switching edges of each of the three phase drive waveforms (24 variables total). We achieve a 50 ?s rise time, which is reduction in half compared to the 100 ?s achieved at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Considering that HVCMs typically operate with an output voltage of 100 kV, with a 60Hz repetitionmore »rate, the 50 ?s rise time reduction will result in very significant energy savings. The ES algorithm will prove successful, despite the noisy measurements and cost calculations, confirming the theoretical results that the algorithm is not affected by noise whose frequency components are independent of the perturbing frequencies.« less

  7. Transit Timing Observations from Kepler: VII. Potentially interesting candidate systems from Fourier-based statistical tests

    SciTech Connect (OSTI)

    Steffen, Jason H.; Ford, Eric B.; Rowe, Jason F.; Fabrycky, Daniel C.; Holman, Matthew J.; Welsh, William F.; Borucki, William J.; Batalha, Natalie M.; Bryson, Steve; Caldwell, Douglas A.; Ciardi, David R.; /Caltech /NASA, Ames /SETI Inst., Mtn. View

    2012-01-01

    We analyze the deviations of transit times from a linear ephemeris for the Kepler Objects of Interest (KOI) through Quarter six (Q6) of science data. We conduct two statistical tests for all KOIs and a related statistical test for all pairs of KOIs in multi-transiting systems. These tests identify several systems which show potentially interesting transit timing variations (TTVs). Strong TTV systems have been valuable for the confirmation of planets and their mass measurements. Many of the systems identified in this study should prove fruitful for detailed TTV studies.

  8. Practical and fast quantum random number generation based on photon arrival time relative to external reference

    SciTech Connect (OSTI)

    Nie, You-Qi; Zhang, Jun Pan, Jian-Wei; Zhang, Hong-Fei; Wang, Jian; Zhang, Zhen; Ma, Xiongfeng

    2014-02-03

    We present a practical high-speed quantum random number generator, where the timing of single-photon detection relative to an external time reference is measured as the raw data. The bias of the raw data can be substantially reduced compared with the previous realizations. The raw random bit rate of our generator can reach 109 Mbps. We develop a model for the generator and evaluate the min-entropy of the raw data. Toeplitz matrix hashing is applied for randomness extraction, after which the final random bits are able to pass the standard randomness tests.

  9. CLIPPER: Counter-based Low Impact Processor Power Estimation at Run-time

    E-Print Network [OSTI]

    New South Wales, University of

    is dif- ficult as measurement systems for power and energy usage draw too much power themselves, making Parameswaran School of Computer Science and Engineering, National ICT Australia The University of New South the knowledge of processor power/energy consumption at run- time. So far, no efficient method to provide run

  10. Frequency domain and time domain analysis of thermoacoustic oscillations with wave-based acoustics

    E-Print Network [OSTI]

    Orchini, A.; Illingworth, S. J.; Juniper, M. P.

    2015-05-14

    Many thermoacoustic systems exhibit rich nonlinear behaviour. Recent studies show that this nonlinear dynamics can be well captured by low-order time domain models that couple a level set kinematic model for a laminar flame, the G-equation, with a...

  11. Semi-Automatic Region-Based Memory Management for Real-Time Java Embedded Systems

    E-Print Network [OSTI]

    Salagnac, Guillaume

    , our system behaves as efficiently as a garbage collector in terms of memory consumption. Our analysis garbage collectors (GC) is further- more hindered by hardware limitations, and embedded sys- tems analysis tool, we provide an environ- ment where all memory operations run in predictable time, 1http://java.sun

  12. A Supply Chain Network Game Theoretic Framework for Time-Based Competition with

    E-Print Network [OSTI]

    Nagurney, Anna

    and on the demand side; Consumers at the demand markets for the substitutable, but differentiated, products respond Management Isenberg School of Management University of Massachusetts Amherst, Massachusetts 01003 2Pamplin Conference on Computational Management Science May 1-3, 2013, HEC Montr´eal, Quebec, Canada Nagurney, Yu Time

  13. Compact real-time 2-D gradient-based analog VLSI motion sensor

    E-Print Network [OSTI]

    Deutschmann, Rainer

    and projection of its trajectory, obstacle avoidance, ego-motion estimation, recovering the 3-D velocity and 3-D-parallel architecture of the sensor can favourably be used for real-time computation of the focus of expansion step to solving these tasks is often to compute the so called optical ow eld, which is an estimate

  14. Complex absorbing potential based Lorentzian fitting scheme and time dependent quantum transport

    SciTech Connect (OSTI)

    Xie, Hang Kwok, Yanho; Chen, GuanHua; Jiang, Feng; Zheng, Xiao

    2014-10-28

    Based on the complex absorbing potential (CAP) method, a Lorentzian expansion scheme is developed to express the self-energy. The CAP-based Lorentzian expansion of self-energy is employed to solve efficiently the Liouville-von Neumann equation of one-electron density matrix. The resulting method is applicable for both tight-binding and first-principles models and is used to simulate the transient currents through graphene nanoribbons and a benzene molecule sandwiched between two carbon-atom chains.

  15. Timing Aware Partitioning for Multi-FPGA based Logic Simulation using Top-down Selective Flattening 

    E-Print Network [OSTI]

    Poothamkurissi Swaminathan, Subramanian

    2012-10-19

    to partition the design and simulate it on a multi-FPGA platform. In contrast to existing FPGA-based post-synthesis partitioning approaches which first completely flatten the circuit and then possibly perform bottom-up clustering, we perform a selective top...

  16. Discrete-Time Model of an IPMSM Based on Variational Integrators

    E-Print Network [OSTI]

    Noé, Reinhold

    as automobile traction drives for electric and hybrid electric vehicles. Since motor control is commonly. INTRODUCTION Interior permanent magnet synchronous motors (IPMSM) provide a high efficiency besides very high motor models are needed to design appropriate control algorithms based on a deep insight into the motor

  17. Supervised Learning Based Model for Predicting Variability-Induced Timing Errors

    E-Print Network [OSTI]

    Gupta, Rajesh

    combat variations in hardware and workload by increasing conservative guardbanding that leads, for a given amount of guardband reduction. The proposed methodology enables a model-based rule method the robustness of our modeling methodology by considering various operating voltage and temperature corners. Our

  18. Fluorescence Rise Time Measurements for High Temperature Fluorescence-Based Thermometry

    SciTech Connect (OSTI)

    Allison, S.W.

    2005-03-24

    Certain ceramic-like phosphor materials exhibit bright fluorescence with a pronounced temperature dependence over a range which spans the cryogenic to 1700 C, depending on the specific phosphor. To measure temperature, a surface, for instance a turbine blade, is coated with the material. An optical system, sometimes including optical fibers, conveys stimulating light and collects the emission for analysis. Either emission intensity or decay time may indicate temperature. Previously fielded tests have involved surfaces such as blades, vanes, pistons, in-take valves, sheets of galvanneal steel, etc. The fluorescent coatings may be applied to small parts via sputtering methods or to large areas by mixture with inorganic binders. Presented here are results characterizing fluorescence rise times as a means of determining temperature from ambient to 700 C for Y{sub 2}O{sub 3}:Eu.

  19. Invited Article: Characterization of background sources in space-based time-of-flight mass spectrometers

    SciTech Connect (OSTI)

    Gilbert, J. A.; Gershman, D. J.; Gloeckler, G.; Lundgren, R. A.; Zurbuchen, T. H.; Orlando, T. M.; McLain, J.; Steiger, R. von

    2014-09-15

    For instruments that use time-of-flight techniques to measure space plasma, there are common sources of background signals that evidence themselves in the data. The background from these sources may increase the complexity of data analysis and reduce the signal-to-noise response of the instrument, thereby diminishing the science value or usefulness of the data. This paper reviews several sources of background commonly found in time-of-flight mass spectrometers and illustrates their effect in actual data using examples from ACE-SWICS and MESSENGER-FIPS. Sources include penetrating particles and radiation, UV photons, energy straggling and angular scattering, electron stimulated desorption of ions, ion-induced electron emission, accidental coincidence events, and noise signatures from instrument electronics. Data signatures of these sources are shown, as well as mitigation strategies and design considerations for future instruments.

  20. Exploiting Real-Time FPGA Based Adaptive Systems Technology for Real-Time Sensor Fusion in Next Generation Automotive Safety Systems

    E-Print Network [OSTI]

    Chappell, Steve; Preston, Dan; Olmstead, Dave; Flint, Bob; Sullivan, Chris

    2011-01-01

    We present a system for the boresighting of sensors using inertial measurement devices as the basis for developing a range of dynamic real-time sensor fusion applications. The proof of concept utilizes a COTS FPGA platform for sensor fusion and real-time correction of a misaligned video sensor. We exploit a custom-designed 32-bit soft processor core and C-based design & synthesis for rapid, platform-neutral development. Kalman filter and sensor fusion techniques established in advanced aviation systems are applied to automotive vehicles with results exceeding typical industry requirements for sensor alignment. Results of the static and the dynamic tests demonstrate that using inexpensive accelerometers mounted on (or during assembly of) a sensor and an Inertial Measurement Unit (IMU) fixed to a vehicle can be used to compute the misalignment of the sensor to the IMU and thus vehicle. In some cases the model predications and test results exceeded the requirements by an order of magnitude with a 3-sigma or ...

  1. Next-Generation Liquid-Scintillator-Based Detectors: Quantums Dots and Picosecond Timing

    E-Print Network [OSTI]

    Lindley Winslow

    2013-07-10

    Liquid-scintillator-based detectors are a robust technology that scales well to large volumes. For this reason, they are attractive for experiments searching for neutrinoless double-beta decay. A combination of improved photo-detection technology and novel liquid scintillators may allow for the extraction of particle direction in addition to the total energy of the particle. Such an advance would find applications beyond searches for neutrinoless double-beta decay.

  2. Thermal bistability-based method for real-time optimization of ultralow-threshold whispering gallery mode microlasers

    E-Print Network [OSTI]

    Lin, Guoping; Tillement, O; Cai, Zhiping; Lefèvre-Seguin, V; Hare, J

    2015-01-01

    A method based on thermal bistability for ultralow-threshold microlaser optimization is demonstrated. When sweeping the pump laser frequency across a pump resonance, the dynamic thermal bistability slows down the power variation. The resulting line shape modification enables a real-time monitoring of the laser characteristic. We demonstrate this method for a functionalized microsphere exhibiting a submicrowatt laser threshold. This approach is confirmed by comparing the results with a step-by-step recording in quasi-static thermal conditions.

  3. GPU-based quasi-real-time Track Recognition in Imaging Devices: from raw Data to Particle Tracks

    E-Print Network [OSTI]

    Bozza, Cristiano; De Sio, Chiara; Stellacci, Simona Maria

    2015-01-01

    Nuclear emulsions as tracking devices have been used by recent experiments thanks to fast automatic microscopes for emulsion readout. Automatic systems are evolving towards GPU-based solutions. Real-time imaging is needed to drive the motion of the microscope axes and 3D track recognition occurs quasi-online in local GPU clusters. The algorithms implemented in the Quick Scanning System are sketched. Most of them are very general and might turn out useful for other detector

  4. Beam-Target Double-Spin Asymmetry ALT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized He3 Target at 1.4Q22.7 GeV2

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

    Huang, J.; Allada, K.; Dutta, C.; Katich, J.; Qian, X.; Wang, Y.; Zhang, Y.; Aniol, K.; Annand, J. R. M.; Averett, T.; et al

    2012-01-01

    We report the first measurement of the double-spin asymmetry ALT for charged pion electroproduction in semi-inclusive deep inelastic electron scattering on a transversely polarized 3He target. The kinematics focused on the valence quark region, 0.16 2 2. The corresponding neutron ALT asymmetries were extracted from the measured 3He asymmetries and proton/3He cross section ratios using the effective polarization approximation. These new data probe the transverse momentum dependent parton distribution function g1Tq and therefore provide access to quark spin-orbit correlations. Our results indicate a positive azimuthal asymmetry for ?- production on 3Hemore »and the neutron, while our ?+ asymmetries are consistent with zero.« less

  5. Transmission line relay mis-operation detection based on time-synchronized field data

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

    Esmaeilian, Ahad; Popovic, Tomo; Kezunovic, Mladen

    2015-05-04

    In this paper, a real-time tool to detect transmission line relay mis-operation is implemented. The tool uses time-synchronized measurements obtained from both ends of the line during disturbances. The proposed fault analysis tool comes into the picture only after the protective device has operated and tripped the line. The proposed methodology is able not only to detect, classify, and locate transmission line faults, but also to accurately confirm whether the line was tripped due to a mis-operation of protective relays. The analysis report includes either detailed description of the fault type and location or detection of relay mis-operation. As such,more »it can be a source of very useful information to support the system restoration. The focus of the paper is on the implementation requirements that allow practical application of the methodology, which is illustrated using the field data obtained the real power system. Testing and validation is done using the field data recorded by digital fault recorders and protective relays. The test data included several hundreds of event records corresponding to both relay mis-operations and actual faults. The discussion of results addresses various challenges encountered during the implementation and validation of the presented methodology.« less

  6. FPGA Based Real-time Network Traffic Analysis using Traffic Dispersion Patterns

    SciTech Connect (OSTI)

    Khan, F; Gokhale, M; Chuah, C N

    2010-03-26

    The problem of Network Traffic Classification (NTC) has attracted significant amount of interest in the research community, offering a wide range of solutions at various levels. The core challenge is in addressing high amounts of traffic diversity found in today's networks. The problem becomes more challenging if a quick detection is required as in the case of identifying malicious network behavior or new applications like peer-to-peer traffic that have potential to quickly throttle the network bandwidth or cause significant damage. Recently, Traffic Dispersion Graphs (TDGs) have been introduced as a viable candidate for NTC. The TDGs work by forming a network wide communication graphs that embed characteristic patterns of underlying network applications. However, these patterns need to be quickly evaluated for mounting real-time response against them. This paper addresses these concerns and presents a novel solution for real-time analysis of Traffic Dispersion Metrics (TDMs) in the TDGs. We evaluate the dispersion metrics of interest and present a dedicated solution on an FPGA for their analysis. We also present analytical measures and empirically evaluate operating effectiveness of our design. The mapped design on Virtex-5 device can process 7.4 million packets/second for a TDG comprising of 10k flows at very high accuracies of over 96%.

  7. A Real-Time Beam Monitor for Hadrontherapy Applications Based on Thin Foil Secondary Electron Emission and a Back-Thinned Monolithic Pixel Sensor

    E-Print Network [OSTI]

    Badano, L; Caccia, M; Cappellini, C; Chmill, V; Jastrzab, M; Abbas, K; Holzwarth, U; Gibson, P N; Molinari, G

    2008-01-01

    A Real-Time Beam Monitor for Hadrontherapy Applications Based on Thin Foil Secondary Electron Emission and a Back-Thinned Monolithic Pixel Sensor

  8. Real-time Global Flood Estimation using Satellite-based Precipitation and a Coupled Land Surface and Routing Model

    SciTech Connect (OSTI)

    Wu, Huan; Adler, Robert F.; Tian, Yudong; Huffman, George; Li, Hongyi; Wang, Jianjian

    2014-04-09

    A community land surface model, the Variable Infiltration Capacity (VIC) model, is coupled with a newly developed hierarchical dominant river tracing-based runoff-routing model to form the Dominant river tracing-Routing Integrated with VIC Environment (DRIVE) model system, which serves as the new core of the real-time Global Flood Monitoring System (GFMS). The GFMS uses real-time satellite-based precipitation to derive flood-monitoring parameters for the latitude-band 50{degree sign}N-50{degree sign}S at relatively high spatial (~12km) and temporal (3-hourly) resolution. Examples of model results for recent flood events are computed using the real-time GFMS (http://flood.umd.edu). To evaluate the accuracy of the new GFMS, the DRIVE model is run retrospectively for 15 years using both research-quality and real-time satellite precipitation products. Statistical results are slightly better for the research-quality input and significantly better for longer duration events (three-day events vs. one-day events). Basins with fewer dams tend to provide lower false alarm ratios. For events longer than three days in areas with few dams, the probability of detection is ~0.9 and the false alarm ratio is ~0.6. In general, these statistical results are better than those of the previous system. Streamflow was evaluated at 1,121 river gauges across the quasi-global domain. Validation using real-time precipitation across the tropics (30ºS-30ºN) gives positive daily Nash-Sutcliffe Coef?cients for 107 out of 375 (28%) stations with a mean of 0.19 and 51% of the same gauges at monthly scale with a mean of 0.33. There were poorer results in higher latitudes, probably due to larger errors in the satellite precipitation input.

  9. Design and Implementation of Real-Time Off-Grid Detection Tool Based on FNET/GridEye

    SciTech Connect (OSTI)

    Guo, Jiahui; Zhang, Ye; Liu, Yilu; Young II, Marcus Aaron; Irminger, Philip; Dimitrovski, Aleksandar D; Willging, Patrick

    2014-01-01

    Real-time situational awareness tools are of critical importance to power system operators, especially during emergencies. The availability of electric power has become a linchpin of most post disaster response efforts as it is the primary dependency for public and private sector services, as well as individuals. Knowledge of the scope and extent of facilities impacted, as well as the duration of their dependence on backup power, enables emergency response officials to plan for contingencies and provide better overall response. Based on real-time data acquired by Frequency Disturbance Recorders (FDRs) deployed in the North American power grid, a real-time detection method is proposed. This method monitors critical electrical loads and detects the transition of these loads from an on-grid state, where the loads are fed by the power grid to an off-grid state, where the loads are fed by an Uninterrupted Power Supply (UPS) or a backup generation system. The details of the proposed detection algorithm are presented, and some case studies and off-grid detection scenarios are also provided to verify the effectiveness and robustness. Meanwhile, the algorithm has already been implemented based on the Grid Solutions Framework (GSF) and has effectively detected several off-grid situations.

  10. A Comprehensive Statistically-Based Method to Interpret Real-Time Flowing Measurements

    SciTech Connect (OSTI)

    Pinan Dawkrajai; Keita Yoshioka; Analis A. Romero; Ding Zhu; A.D. Hill; Larry W. Lake

    2005-10-01

    This project is motivated by the increasing use of distributed temperature sensors for real-time monitoring of complex wells (horizontal, multilateral and multi-branching wells) to infer the profiles of oil, gas, and water entry. Measured information can be used to interpret flow profiles along the wellbore including junction and build section. In this second project year, we have completed a forward model to predict temperature and pressure profiles in complex wells. As a comprehensive temperature model, we have developed an analytical reservoir flow model which takes into account Joule-Thomson effects in the near well vicinity and multiphase non-isothermal producing wellbore model, and couples those models accounting mass and heat transfer between them. For further inferences such as water coning or gas evaporation, we will need a numerical non-isothermal reservoir simulator, and unlike existing (thermal recovery, geothermal) simulators, it should capture subtle temperature change occurring in a normal production. We will show the results from the analytical coupled model (analytical reservoir solution coupled with numerical multi-segment well model) to infer the anomalous temperature or pressure profiles under various conditions, and the preliminary results from the numerical coupled reservoir model which solves full matrix including wellbore grids. We applied Ramey's model to the build section and used an enthalpy balance to infer the temperature profile at the junction. The multilateral wellbore temperature model was applied to a wide range of cases varying fluid thermal properties, absolute values of temperature and pressure, geothermal gradients, flow rates from each lateral, and the trajectories of each build section.

  11. Time-dependent Multi-group Multidimensional Relativistic Radiative Transfer Code Based On Spherical Harmonic Discrete Ordinate Method

    E-Print Network [OSTI]

    Tominaga, Nozomu; Blinnikov, Sergei I

    2015-01-01

    We develop a time-dependent multi-group multidimensional relativistic radiative transfer code, which is required to numerically investigate radiation from relativistic fluids involved in, e.g., gamma-ray bursts and active galactic nuclei. The code is based on the spherical harmonic discrete ordinate method (SHDOM) that evaluates a source function including anisotropic scattering in spherical harmonics and implicitly solves the static radiative transfer equation with a ray tracing in discrete ordinates. We implement treatments of time dependence, multi-frequency bins, Lorentz transformation, and elastic Thomson and inelastic Compton scattering to the publicly available SHDOM code. Our code adopts a mixed frame approach; the source function is evaluated in the comoving frame whereas the radiative transfer equation is solved in the laboratory frame. This implementation is validated with various test problems and comparisons with results of a relativistic Monte Carlo code. These validations confirm that the code ...

  12. Hit time and hit position reconstruction in the J-PET detector based on a library of averaged model signals

    E-Print Network [OSTI]

    P. Moskal; N. G. Sharma; M. Silarski; T. Bednarski; P. Bia?as; J. Bu?ka; E. Czerwi?ski; A. Gajos; D. Kami?ska; L. Kap?on; A. Kochanowski; G. Korcyl; J. Kowal; P. Kowalski; T. Kozik; W. Krzemie?; E. Kubicz; Sz. Nied?wiecki; M. Pa?ka; L. Raczy?ski; Z. Rudy; O. Rundel; P. Salabura; A. S?omski; J. Smyrski; A. Strzelecki; A. Wieczorek; W. Wi?licki; I. Wochlik; M. Zieli?ski; N. Zo?

    2015-02-27

    In this article we present a novel method of hit time and hit position reconstruction in long scintillator detectors. We take advantage of the fact that for this kind of detectors amplitude and shape of registered signals depends strongly on the position where particle hit the detector. The reconstruction is based on determination of the degree of similarity between measured and averaged signals stored in a library for a set of well-defined positions along the scintillator. Preliminary results of validation of the introduced method with experimental data obtained by means of the double strip prototype of the J-PET detector are presented.

  13. Prediction of global solar irradiance based on time series analysis: Application to solar thermal power plants energy production planning

    SciTech Connect (OSTI)

    Martin, Luis; Marchante, Ruth; Cony, Marco; Zarzalejo, Luis F.; Polo, Jesus; Navarro, Ana

    2010-10-15

    Due to strong increase of solar power generation, the predictions of incoming solar energy are acquiring more importance. Photovoltaic and solar thermal are the main sources of electricity generation from solar energy. In the case of solar thermal energy plants with storage energy system, its management and operation need reliable predictions of solar irradiance with the same temporal resolution as the temporal capacity of the back-up system. These plants can work like a conventional power plant and compete in the energy stock market avoiding intermittence in electricity production. This work presents a comparisons of statistical models based on time series applied to predict half daily values of global solar irradiance with a temporal horizon of 3 days. Half daily values consist of accumulated hourly global solar irradiance from solar raise to solar noon and from noon until dawn for each day. The dataset of ground solar radiation used belongs to stations of Spanish National Weather Service (AEMet). The models tested are autoregressive, neural networks and fuzzy logic models. Due to the fact that half daily solar irradiance time series is non-stationary, it has been necessary to transform it to two new stationary variables (clearness index and lost component) which are used as input of the predictive models. Improvement in terms of RMSD of the models essayed is compared against the model based on persistence. The validation process shows that all models essayed improve persistence. The best approach to forecast half daily values of solar irradiance is neural network models with lost component as input, except Lerida station where models based on clearness index have less uncertainty because this magnitude has a linear behaviour and it is easier to simulate by models. (author)

  14. A Web-Based Common Framework to Support the Test and Evaluation Process Any Time, Anywhere, and Anyhow

    SciTech Connect (OSTI)

    Schur, Anne ); Brown, James C. ); Eaton, Sharon L. ); Gibson, Alex G. ); Scott, Ryan T. ); Tanasse, Ted E. )

    2001-01-01

    Test and evaluation (T and E) is an enterprise. For any product, large or small, performance data is desired on many aspects to evaluate the product?s effectiveness for the intended users. Representing the many T and E facets without bewildering the user is challenging when there is a range of people, from the system developers to the manager of the organization, that want specific feedback. A web-based One-Stop Evaluation Center was created to meet these needs for a particular project. The evaluation center is usable at any time in the systems development lifecycle and streamlines the T and E enterprise. This paper discusses a common framework that unifies the T and E process with many stakeholders involved and is flexible to accommodate each stakeholders?specific evaluative processes and content. Our success has translated to many cost savings by enabling quick responses to change and a better line of communication between the users, developers, and managers.

  15. Model-Based Clustering of Regression Time Series Data via APECM -- An AECM Algorithm Sung to an Even Faster Beat

    SciTech Connect (OSTI)

    Chen, Wei-Chen [ORNL; Maitra, Ranjan [Iowa State University

    2011-01-01

    We propose a model-based approach for clustering time series regression data in an unsupervised machine learning framework to identify groups under the assumption that each mixture component follows a Gaussian autoregressive regression model of order p. Given the number of groups, the traditional maximum likelihood approach of estimating the parameters using the expectation-maximization (EM) algorithm can be employed, although it is computationally demanding. The somewhat fast tune to the EM folk song provided by the Alternating Expectation Conditional Maximization (AECM) algorithm can alleviate the problem to some extent. In this article, we develop an alternative partial expectation conditional maximization algorithm (APECM) that uses an additional data augmentation storage step to efficiently implement AECM for finite mixture models. Results on our simulation experiments show improved performance in both fewer numbers of iterations and computation time. The methodology is applied to the problem of clustering mutual funds data on the basis of their average annual per cent returns and in the presence of economic indicators.

  16. Understanding local and macroscopic electron mobilities in the fullerene network of conjugated polymer-based solar cells: Time-resolved microwave conductivity and theory

    E-Print Network [OSTI]

    2014-01-01

    of low mobility on organic solar cell perfor- mance" , 15thPCBM is nearly ideal for solar cells: the coupling betweenof Conjugated Polymer-based Solar Cells: Time-Resolved

  17. Analyzing traditional and web-based news organizations: a science and technology news comparison of the New York Times and MSNBC News 

    E-Print Network [OSTI]

    Zhang, Miao

    2002-01-01

    and frames of science and technology news by analyzing science and technology news from the New York Times, a representative of traditional news organizations, and MSNBC, a representative of Web-based news organizations, for the period of December 2001...

  18. A field comparison of Fresnel zone and ray-based GPR attenuation-difference tomography for time-lapse imaging of

    E-Print Network [OSTI]

    Barrash, Warren

    A field comparison of Fresnel zone and ray-based GPR attenuation-difference tomography for time the medium. These sensitivities occupy the first Fresnel zone, account for the finite frequency nature

  19. SU-E-J-158: Experimental Investigation of Proton Radiography Based On Time-Resolved Dose Measurements

    SciTech Connect (OSTI)

    Testa, M; Paganetti, H; Lu, H-M [Massachusetts General Hospital ' Harvard Medical School, Boston, MA (United States); Doolan, P [University College London (United Kingdom); H, Bentefour E [IBA, Warrenville, IL (United States)

    2014-06-01

    Purpose: To use proton radiography for i) in-vivo range verification of the brain fields of medulloblastoma patients in order to reduce the exit dose to the cranial skin and thus the risk of permanent alopecia; ii) for performing patient specific optimization of the calibration from CT-Hounsfield units to proton relative stopping power in order to minimize uncertainties of proton rang Methods: We developed and tested a prototype proton radiography system based on a single-plane scintillation screen coupled with a fast CCD camera (1ms sampling rate, 0.29x0.29 mm{sup 2} pixel size, 30×30 cm{sup 2} field of view). The method is based on the principle that, for passively scattered beams, the radiological depth of any point in the plateau of a spread-out Bragg-Peak (SOBP) can be inferred from the time-pattern of the dose rate measurements. We performed detector characterization measurements using complex-shape homogeneous phantoms and an Alderson phanto Results: Detector characterization tests confirmed the robustness of the technique. The results of the phantom measurements are encouraging in terms of achievable accuracy of the water equivalent thickness. A technique to minimize the degradation of spatial resolution due to multiple Coulomb scattering is discussed. Our novel radiographic technique is rapid (100 ms) and simultaneous over the whole field. The dose required to produce one radiograph, with the current settings, is ?3 cG Conclusion: The results obtained with this simple and innovative radiography method are promising and motivate further development of technique. The system requires only a single-plane 2D dosimeter and it uses the clinical beam for a fraction of second with low dose to the patient.

  20. Price-Maker Economic Bidding in Two-Settlement Pool-Based Markets: The Case of Time-Shiftable Loads

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    are found for the price and energy bids within a relatively short amount of computational time. A detailed bidding, price bids, energy bids, day-ahead market, real-time market, time-shiftable loads, demand to day-ahead market y Energy bid to real-time market p Price bid submitted to the day-ahead market

  1. Summary of Time Period-Based and Other Approximation Methods for Determining the Capacity Value of Wind and Solar in the United States: September 2010 - February 2012

    SciTech Connect (OSTI)

    Rogers, J.; Porter, K.

    2012-03-01

    This paper updates previous work that describes time period-based and other approximation methods for estimating the capacity value of wind power and extends it to include solar power. The paper summarizes various methods presented in utility integrated resource plans, regional transmission organization methodologies, regional stakeholder initiatives, regulatory proceedings, and academic and industry studies. Time period-based approximation methods typically measure the contribution of a wind or solar plant at the time of system peak - sometimes over a period of months or the average of multiple years.

  2. Robustness of Ethernet-Based Real-Time Networked Control System with Multi-Level Client/Server Architecture 

    E-Print Network [OSTI]

    Bibinagar, Naveen Kumar

    2010-10-12

    The importance of real-time communication at the device level in a factory automation setup is a widely researched area. This research is an effort to experimentally verify if Ethernet can be used as a real-time communication ...

  3. Supervised learning of a regression model based on latent process. Application to the estimation of fuel cell life time

    E-Print Network [OSTI]

    Chamroukhi, Faicel

    of fuel cell life time Raïssa Onanena(1) , Faicel Chamroukhi(1) , Latifa Oukhellou(1)(2) , Denis Candusso to estimate fuel cell duration time from electrochemical impedance spectroscopy measurements. It consists for the estimation of fuel cell time duration. The performances of the proposed approach are evaluated

  4. Quantum time

    E-Print Network [OSTI]

    Giovannetti, Vittorio

    We give a consistent quantum description of time, based on Page and Wootters’s conditional probabilities mechanism, which overcomes the criticisms that were raised against similar previous proposals. In particular we show ...

  5. Activity-based Travel Demand Model with Time-use and Microsimulation incorporating Intra-household Interactions

    E-Print Network [OSTI]

    Kim, Hee-Kyung

    2008-01-01

    production function, the optimal allocation of time tofunction, the structural model of household resource allocationfunction. Domestic production model The optimal allocation

  6. Optical models of the big bang and non-trivial space-time metrics based on metamaterials

    E-Print Network [OSTI]

    Igor I. Smolyaninov

    2009-08-17

    Optics of metamaterials is shown to provide interesting table top models of many non-trivial space-time metrics. The range of possibilities is broader than the one allowed in classical general relativity. For example, extraordinary waves in indefinite metamaterials experience an effective metric, which is formally equivalent to the "two times physics" model in 2+2 dimensions. An optical analogue of a "big bang" event is presented during which a (2+1) Minkowski space-time is created together with large number of particles populating this space-time. Such metamaterial models enable experimental exploration of the metric phase transitions to and from the Minkowski space-time as a function of temperature and/or light frequency.

  7. A Numerical Method for Pricing Electricity Derivatives for Jump-Diffusion Processes Based on Continuous Time Lattices

    E-Print Network [OSTI]

    Albanese, Claudio

    A Numerical Method for Pricing Electricity Derivatives for Jump-Diffusion Processes Based.tompaidis@mccombs.utexas.edu Corresponding author. Tel. 512-4715252, Fax 512-4710587. #12;A Numerical Method for Pricing Electricity method for pricing derivatives on electricity prices. The method is based on approximating the generator

  8. A web-based approach to image-based lighting using high dynamic range images and QuickTime object virtual reality 

    E-Print Network [OSTI]

    Cuellar, Tamara Melissa

    2008-10-10

    This thesis presents a web-based approach to lighting three-dimensional geometry in a virtual scene. The use of High Dynamic Range (HDR) images for the lighting model makes it possible to convey a greater sense of ...

  9. CTu3I.7.pdf CLEO Technical Digest OSA 2012 Wavelength-Tunable on-Chip True Time Delay Lines Based

    E-Print Network [OSTI]

    Texas at Austin, University of

    CTu3I.7.pdf CLEO Technical Digest © OSA 2012 Wavelength-Tunable on-Chip True Time Delay Lines Based are described in [2]. #12;CTu3I.7.pdf CLEO Technical Digest © OSA 2012 3. Measurements The modulation phase

  10. Estimated costs for advertising in Saturdays Canberra Times Stand Alone prices are based on small ads (aprox 100 words) and large ads (200 words) colour only

    E-Print Network [OSTI]

    Estimated costs for advertising in Saturdays Canberra Times Stand Alone prices are based on small Appt. Saturday $1,801.62 $300.27 Press Advertising Currently we advertise mainly in Saturdays Canberra composite ads reducing costs significantly. All other advertisements would appear as standalones. All

  11. The system for observing fitness instruction time (SOFIT) as a measure of energy expenditure during classroom based physical activity

    E-Print Network [OSTI]

    Honas, Jeffery J.; Washburn, Richard A.; Smith, Bryan K.; Greene, Leon; Cook-Wiens, Galen; Donnelly, Joseph E.

    2008-01-01

    The aim of this investigation was to develop an equation to estimate physical activity energy expenditure (PAEE) during a 10-min physically active academic lesson using The System for Observing Fitness Instruction Time ...

  12. A time-resolved spectroscopic diagnostic based on fast scintillator and optical fiber array for z-pinch plasmas

    SciTech Connect (OSTI)

    Ye Fan; Qin Yi; Jiang Shuqing; Xue Feibiao; Li Zhenghong; Yang Jianlun; Xu Rongkun; Anan'ev, S. S.; Dan'ko, S. A.; Kalinin, Yu. G.

    2009-10-15

    We report a specially designed type of temporal resolved x-ray spectroscopic diagnostic using a spherically bent quartz crystal for z-pinch plasmas. Registration of time-resolved spectra was accomplished by coupling fast plastic scintillator, an optical fiber array, an optical streak camera, and a charge coupled device as the recording medium of this diagnostic. The diagnostic has been tested in imploding wire array experiments on S-300 pulsed power facility. Time-resolved K-shell lines were successfully obtained for aluminum wire array implosion plasmas.

  13. A Novel Time-Domain Based Design of PWM Controllers for Switch-Mode Converters and its Implementation by

    E-Print Network [OSTI]

    to discrete domain transformation and discretization. Digital PID controllers for a Buck and Boost type, known control transfer functions are transformed from analog (linear) into a digital equivalent using A new time-domain design method for digital controller of PWM DC-DC converters that was developed

  14. Centralized route recovery based on multi-hop wakeup time estimation for wireless sensor networks with ultra low duty cycles

    E-Print Network [OSTI]

    Bahk, Saewoong

    with ultra low duty cycles Wooguil Pak, Saewoong Bahk Department of EECS & INMC, Seoul National University Keywords: Wireless sensor network Routing protocol Ultra low duty cycle Network lifetime Multi-hop wakeup time estimation to maximize the network lifetime of WSNs under ultra low duty cycles. It does not use

  15. 1664 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 64, NO. 5, MAY 2015 Real-Time Path Planning Based on

    E-Print Network [OSTI]

    Shen, Xuemin "Sherman"

    utilization and drivers' travel cost. Index Terms--Hybrid VANETs, path planning, spatial utiliza- tion, travel1664 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 64, NO. 5, MAY 2015 Real-Time Path Planning planning can efficiently relieve traffic congestion in urban scenarios. However, how to design an efficient

  16. Real-time implementation of a neural networks-based motor speed filter using a digital signal processor 

    E-Print Network [OSTI]

    Harihara, Parasuram Padmanabhan

    2002-01-01

    numerous speed estimation methods have been reported in the literature for the control of an induction motor drive, it is the accuracy of the speed estimate and the response time of the filter that are the important parameters describing the speed filter...

  17. Benefits of Considering Inventory in Service Parts Logistics Network Design Problems with Time-based Service Constraints

    E-Print Network [OSTI]

    Kutanoglu, Erhan

    Benefits of Considering Inventory in Service Parts Logistics Network Design Problems with Time, 2006 Abstract We study the integrated logistics network design and inventory stocking problem as char- acterized by the interdependency of the design and stocking decisions in service parts logistics. These two

  18. Benefits of Considering Inventory in Service Parts Logistics Network Design Problems with Time-based Service Constraints

    E-Print Network [OSTI]

    Kutanoglu, Erhan

    Benefits of Considering Inventory in Service Parts Logistics Network Design Problems with Time 18, 2005 Abstract We study the integrated logistics network design and inventory stocking problem as char- acterized by the interdependency of the design and stocking decisions in service parts logistics

  19. Tile-Based Fisher-Ratio Software for Improved Feature Selection Analysis of Comprehensive Two-Dimensional Gas Chromatography Time-of-Flight Mass Spectrometry Data

    SciTech Connect (OSTI)

    Marney, Luke C.; Siegler, William C.; Parsons, Brendon A.; Hoggard, Jamin C.; Wright, Bob W.; Synovec, Robert E.

    2013-10-15

    Two-dimensional (2D) gas chromatography coupled with time-of-flight mass spectrometry (GC × GC – TOFMS) is a highly capable instrumental platform that produces complex and information-rich multi-dimensional chemical data. The complex data can be overwhelming, especially when many samples (of various sample classes) are analyzed with multiple injections for each sample. Thus, the data must be analyzed in such a way to extract the most meaningful information. The pixel-based and peak table-based algorithmic use of Fisher ratios has been used successfully in the past to reduce the multi-dimensional data down to those chemical compounds that are changing between classes relative to those that are not (i.e., chemical feature selection). We report on the initial development of a computationally fast novel tile-based Fisher-ratio software that addresses challenges due to 2D retention time misalignment without explicitly aligning the data, which is a problem for both pixel-based and peak table- based methods. Concurrently, the tile-based Fisher-ratio software maximizes the sensitivity contrast of true positives against a background of potential false positives and noise. To study this software, eight compounds, plus one internal standard, were spiked into diesel at various concentrations. The tile-based F-ratio software was able to discover all spiked analytes, within the complex diesel sample matrix with thousands of potential false positives, in each possible concentration comparison, even at the lowest absolute spiked analyte concentration ratio of 1.06.

  20. Local Recurrence in Women With Stage I Breast Cancer: Declining Rates Over Time in a Large, Population-Based Cohort

    SciTech Connect (OSTI)

    Canavan, Joycelin; Truong, Pauline T.; Smith, Sally L.; Lu, Linghong; Lesperance, Mary; Olivotto, Ivo A.

    2014-01-01

    Purpose: To evaluate whether local recurrence (LR) risk has changed over time among women with stage I breast cancer treated with breast-conserving therapy. Methods and Materials: Subjects were 5974 women aged ?50 years diagnosis with pT1N0 breast cancer from 1989 to 2006, treated with breast-conserving surgery and radiation therapy. Clinicopathologic characteristics, treatment, and LR outcomes were compared among 4 cohorts stratified by year of diagnosis: 1989 to 1993 (n=1077), 1994 to 1998 (n=1633), 1999 to 2002 (n=1622), and 2003 to 2006 (n=1642). Multivariable analysis was performed, with year of diagnosis as a continuous variable. Results: Median follow-up time was 8.6 years. Among patients diagnosed in 1989 to 1993, 1994 to 1998, 1999 to 2002, and 2003 to 2006, the proportions of grade 1 tumors increased (16% vs 29% vs 40% vs 39%, respectively, P<.001). Surgical margin clearance rates increased from 82% to 93% to 95% and 88%, respectively (P<.001). Over time, the proportions of unknown estrogen receptor (ER) status decreased (29% vs 10% vs 1.2% vs 0.5%, respectively, P<.001), whereas ER-positive tumors increased (56% vs 77% vs 86% vs 86%, respectively, P<.001). Hormone therapy use increased (23% vs 23% vs 62% vs 73%, respectively, P<.001), and chemotherapy use increased (2% vs 5% vs 10% vs 13%, respectively, P<.001). The 5-year cumulative incidence rates of LR over the 4 time periods were 2.8% vs 1.7% vs 0.9% vs 0.8%, respectively (Gray's test, P<.001). On competing risk multivariable analysis, year of diagnosis was significantly associated with decreased LR (hazard ratio, 0.92 per year, P=.0003). Relative to grade 1 histology, grades 2, 3, and unknown were associated with increased LR. Hormone therapy use was associated with reduced LR. Conclusion: Significant changes in the multimodality management of stage I breast cancer have occurred over the past 2 decades. More favorable-risk tumors were diagnosed, and margin clearance and systemic therapy use increased. These changes contributed to the observed declining LR rates among patients treated with breast-conserving therapy.

  1. 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.

  2. Time-domain simulation of ultrasound propagation in a tissue-like medium based on the resolution of the nonlinear acoustic constitutive relations

    E-Print Network [OSTI]

    Jiménez, Noé; Redondo, Javier; Sánchez-Morcillo, Víctor; Hou, Yi; Konofagou, Elisa E

    2015-01-01

    A time-domain numerical code based on the constitutive relations of nonlinear acoustics for simulating ultrasound propagation is presented. To model frequency power law attenuation, such as observed in biological media, multiple relaxation processes are included and relaxation parameters are fitted to both exact frequency power law attenuation and empirically measured attenuation of a variety of tissues that does not fit an exact power law. A computational technique based on artificial relaxation is included to correct the non-negligible numerical dispersion of the numerical method and to improve stability when shock waves are present. This technique avoids the use of high order finite difference schemes, leading to fast calculations. The numerical code is especially suitable to study high intensity and focused axisymmetric acoustic beams in tissue-like medium, as it is based on the full constitutive relations that overcomes the limitations of the parabolic approximations, while some specific effects not cont...

  3. Micromagnetic analysis of dynamical bubble-like solitons based on the time domain evolution of the topological density

    SciTech Connect (OSTI)

    Puliafito, Vito Azzerboni, Bruno; Finocchio, Giovanni; Torres, Luis; Ozatay, Ozhan

    2014-05-07

    Dynamical bubble-like solitons have been recently investigated in nanocontact-based spin-torque oscillators with a perpendicular free layer. Those magnetic configurations can be excited also in different geometries as long as they consist of perpendicular materials. Thus, in this paper, a systematic study of the influence of both external field and high current on that kind of dynamics is performed for a spin-valve point-contact geometry where both free and fixed layers present strong perpendicular anisotropy. The usage of the topological density tool highlights the excitation of complex bubble/antibubble configurations. In particular, at high currents, a deformation of the soliton and its simultaneous shift from the contact area are observed and can be ascribable to the Oersted field. Results provide further detailed information on the excitation of solitons in perpendicular materials for application in spintronics, magnonics, and domain wall logic.

  4. Growth Kinetics of Lipid-Based Nanodiscs to Unilamellar Vesicles: A Time-Resolved Small Angle Neutron Scattering (SANS) Study

    SciTech Connect (OSTI)

    Mahabir, Suanne [University of Western Ontario, The; Small, Darcy [University of Western Ontario, The; Li, Ming [University of Connecticut, Storrs; Wan, Wankei [University of Western Ontario, The; Kucerka, Norbert [Canadian Neutron Beam Centre and Comelius University (Slovakia); Littrell, Ken [ORNL; Katsaras, John [ORNL; Nieh, Mu-Ping [University of Connecticut, Storrs

    2013-01-01

    Mixtures of dimyristoyl-phosphatidylcholine (DMPC), dimyristoyl-phosphatidylglycerol (DMPG) and dihexanoylphosphatidylcholine (DHPC) in aqueous solutions spontaneously form monodisperse, bilayered nanodiscs (also known as bicelles ) at or below the melting transition temperature of DMPC (TM ~23 C). In dilute systems above the main transition temperature TM of DMPC, bicelles coalesce (increasing their diameter) and eventually self-fold into unilamellar vesicles (ULVs). Time resolved small angle neutron scattering was used to study the growth kinetics of nanodiscs below and equal to TM over a period of hours as a function of temperature at two lipid concentrations in presence or absence of NaCl salt. Bicelles seem to undergo a sudden initial growth phase with increased temperature, which is then followed by a slower reaction-limited growth phase that depends on ionic strength, lipid concentration and temperature. The bicelle interaction energy was derived from the colloidal theory of Derjaguin and Landau, and Verwey and Overbeek (DLVO). While the calculated total energy between discs is attractive and proportional to their growth rate, a more detailed mechanism is proposed to describe the mechanism of disc coalescence. After annealing at low temperature (low-T), samples were heated to 50 C in order to promote the formation of ULVs. Although the low-T annealing of samples has only a marginal effect on the mean size of end-state ULVs, it does affect their polydispersity, which increases with increased T, presumably driven by the entropy of the system.

  5. Model-based testing for space-time interaction using point processes: An application to psychiatric hospital admissions in an urban area

    E-Print Network [OSTI]

    Meyer, Sebastian; Rössler, Wulf; Held, Leonhard

    2015-01-01

    Spatio-temporal interaction is inherent to cases of infectious diseases and occurrences of earthquakes, whereas the spread of other events, such as cancer or crime, is less evident. Statistical significance tests of space-time clustering usually assess the correlation between the spatial and temporal (transformed) distances of the events. Although appealing through simplicity, these classical tests do not adjust for the underlying population nor can they account for a distance decay of interaction. We propose to use the framework of an endemic-epidemic point process model to jointly estimate a background event rate explained by seasonal and areal characteristics, as well as a superposed epidemic component representing the hypothesis of interest. We illustrate this new model-based test for space-time interaction by analysing psychiatric inpatient admissions in Zurich, Switzerland (2007-2012). Several socio-economic factors were found to be associated with the admission rate, but there was no evidence of genera...

  6. Instructions for Authors Coding with ALTE X

    E-Print Network [OSTI]

    Peterson, James K

    /VMS, 9-track 1600 bpi magnetic tape ANSI with label, SUN-Streamer Tape. Once you have completed your work using this macro package, please submit your own printout of the final version together that the text is identical in both cases. This macro package, as well as all other macro packages, style

  7. Air pollution: Coal based power plants major culprit : HindustanTimes.com http://www.hindustantimes.com/news/5922_1646830,001500250000000... 1 of 2 3/10/2006 7:45 AM

    E-Print Network [OSTI]

    Singh, Ramesh P.

    Air pollution: Coal based power plants major culprit : HindustanTimes.com http 1 Front » Story Air pollution: Coal based power plants major culprit HT Correspondent Kanpur, March that coal based thermal power plants are the main source for air pollution. The fact came to the fore during

  8. A novel method for the line-of-response and time-of-flight reconstruction in TOF-PET detectors based on a library of synchronized model signals

    E-Print Network [OSTI]

    P. Moskal; N. Zo?; T. Bednarski; P. Bia?as; E. Czerwi?ski; A. Gajos; D. Kami?ska; ?. Kap?on; A. Kochanowski; G. Korcyl; J. Kowal; P. Kowalski; T. Kozik; W. Krzemie?; E. Kubicz; Sz. Nied?wiecki; M. Pa?ka; L. Raczy?ski; Z. Rudy; O. Rundel; P. Salabura; N. G. Sharma; M. Silarski; A. S?omski; J. Smyrski; A. Strzelecki; A. Wieczorek; W. Wi?licki; M. Zieli?ski

    2015-02-10

    A novel method of hit time and hit position reconstruction in scintillator detectors is described. The method is based on comparison of detector signals with results stored in a library of synchronized model signals registered for a set of well-defined positions of scintillation points. The hit position is reconstructed as the one corresponding to the signal from the library which is most similar to the measurement signal. The time of the interaction is determined as a relative time between the measured signal and the most similar one in the library. A degree of similarity of measured and model signals is defined as the distance between points representing the measurement- and model-signal in the multi-dimensional measurement space. Novelty of the method lies also in the proposed way of synchronization of model signals enabling direct determination of the difference between time-of-flights (TOF) of annihilation quanta from the annihilation point to the detectors. The introduced method was validated using experimental data obtained by means of the double strip prototype of the J-PET detector and $^{22}$Na sodium isotope as a source of annihilation gamma quanta.The detector was built out from plastic scintillator strips with dimensions of 5 mm x 19 mm x 300 mm, optically connected at both sides to photomultipliers,from which signals were sampled by means of the Serial Data Analyzer.Using the introduced method, the spatial and TOF resolution of about 1.3 cm ($\\sigma$) and 125 ps ($\\sigma$) were established, respectively.

  9. Characterization of a detector chain using a FPGA-based Time-to-Digital Converter to reconstruct the three-dimensional coordinates of single particles at high flux

    E-Print Network [OSTI]

    Nogrette, F; Chang, R; Bouton, Q; Westbrook, C I; Sellem, R; Clément, D

    2015-01-01

    We report on the development of a novel FPGA-based Time-to-Digital Converter and its implementation in a detection chain that records the coordinates of single particles along three dimensions. The detector is composed of Micro-Channel Plates mounted on top of a cross delay line and connected to fast electronics. We demonstrate continuous recording of the timing signals from the cross delay line at rates up to 4.1x10^6 per second and three-dimensional reconstruction of the coordinates up to 2.5x10^6 particles per second. From the imaging of a calibrated structure we measure the in-plane resolution of the detector to be 140(20) um. In addition we analyze a method to measure the resolution without placing any structure under vacuum, a significant practical improvement. While we use UV photons here, the results of this work directly apply to the detection of other kinds of particles.

  10. A Computational Analysis of Smart Timing Decisions for Heating Based on an Air-to-Water Heat pump SMARTER EUROPE E-world energy & water 2014 Proceedings page 1

    E-Print Network [OSTI]

    Treur, Jan

    A Computational Analysis of Smart Timing Decisions for Heating Based on an Air-to-Water Heat pump Decisions for Heating Based on an Air-to-Water Heat pump Jan Treur VU University Amsterdam, Agent Systems be most efficient to use this energy in these periods. For air to water heat pumps a similar issue occurs

  11. Real-time volumetric image reconstruction and 3D tumor localization based on a single x-ray projection image for lung cancer radiotherapy

    E-Print Network [OSTI]

    Li, Ruijiang; Lewis, John H; Gu, Xuejun; Folkerts, Michael; Men, Chunhua; Jiang, Steve B

    2010-01-01

    Purpose: To develop an algorithm for real-time volumetric image reconstruction and 3D tumor localization based on a single x-ray projection image for lung cancer radiotherapy. Methods: Given a set of volumetric images of a patient at N breathing phases as the training data, we perform deformable image registration between a reference phase and the other N-1 phases, resulting in N-1 deformation vector fields (DVFs). These DVFs can be represented efficiently by a few eigenvectors and coefficients obtained from principal component analysis (PCA). By varying the PCA coefficients, we can generate new DVFs, which, when applied on the reference image, lead to new volumetric images. We then can reconstruct a volumetric image from a single projection image by optimizing the PCA coefficients such that its computed projection matches the measured one. The 3D location of the tumor can be derived by applying the inverted DVF on its position in the reference image. Our algorithm was implemented on graphics processing units...

  12. Der Alte und der Neue Sden Axel Borsdorf DER ALTE UND DER NEUE SDEN.

    E-Print Network [OSTI]

    Borsdorf, Axel

    Dauergrünland und Futterpflanzenanbau gekennzeichnet. Die Bodennutzung paßt sich damit den klimatischen und

  13. Space time and the passage of time

    E-Print Network [OSTI]

    George F. R. Ellis; Rituparno Goswami

    2012-08-26

    This paper examines the various arguments that have been put forward suggesting either that time does not exist, or that it exists but its flow is not real. I argue that (i) time both exists and flows; (ii) an Evolving Block Universe (`EBU') model of spacetime adequately captures this feature, emphasizing the key differences between the past, present, and future; (iii) the associated surfaces of constant time are uniquely geometrically and physically determined in any realistic spacetime model based in General Relativity Theory; (iv) such a model is needed in order to capture the essential aspects of what is happening in circumstances where initial data does not uniquely determine the evolution of spacetime structure because quantum uncertainty plays a key role in that development. Assuming that the functioning of the mind is based in the physical brain, evidence from the way that the mind apprehends the flow of time prefers this evolving time model over those where there is no flow of time.

  14. 14.2 AN UPDATE ON NEXRAD PROGRAM PLANS FOR COLLECTING AND DISTRIBUTING WSR-88D BASE DATA IN NEAR REAL TIME

    E-Print Network [OSTI]

    Droegemeier, Kelvin K.

    14.2 AN UPDATE ON NEXRAD PROGRAM PLANS FOR COLLECTING AND DISTRIBUTING WSR-88D BASE DATA IN NEAR and increased level of physics where the input of WSR-88D base data (aka Level II data) (Crum et al 1993 (NIDS) agreement has increased thegovernment'sflexibilitytoprovideWSR-88Dproduct and base data

  15. Modeling of time dependence of hole current and prediction of QBD and tBD for thin gate MOS devices based upon

    E-Print Network [OSTI]

    Schroder, Dieter K.

    near the hole charge trapped interface during F±N tunneling of electrons. The ®eld at the localized yield, ®rst order trapping kinetics and dierent tunneling conditions for determining the time variation for evaluating the time dependence of injected electron and generated substrate hole current under constant

  16. A Low-Cost Real-Time Mobile Robot Platform (ArEduBot) to support Project-Based Learning in

    E-Print Network [OSTI]

    Krovi, Venkat

    & Mechatronics Ilya B. Gartseev#1 , Leng-Feng Lee*2 , and Venkat N. Krovi*3 # Moscow State Technical University in introductory robotics and mechatronics classes, to complement the lecture and to support project-based learning created using this framework. Keywords-- project-based learning, mechatronics, robotics, arduino, simulink

  17. A multi-sensor physically based weather/non-weather radar echo classifier using polarimetric and environmental data in a real-time

    E-Print Network [OSTI]

    Lakshmanan, Valliappa

    A multi-sensor physically based weather/non-weather radar echo classifier using polarimetric-hydrometeors. In this work, a multi-sensor physically based algorithm is designed to classify weather/non-weather radar, 2004). Manual quality control (QC) of radar reflectivity data has been practiced at commercial weather

  18. A 78 dB SNDR 87 mW 20 MHz Bandwidth Continuous-Time Delta Sigma ADC With VCO-Based Integrator and Quantizer Implemented in 0.13 mu m CMOS

    E-Print Network [OSTI]

    Park, Matthew

    The use of a VCO-based integrator and quantizer within a continuous-time (CT) \\Delta \\Sigma analog-to-digital converter (ADC) structure is explored, and a custom prototype in a 0.13 \\mum CMOS with a measured performance ...

  19. Molecular beacon-based real-time PCR detection of primary isolates of Salmonella Typhimurium and Salmonella Enteritidis in environmental and clinical samples

    E-Print Network [OSTI]

    Hadjinicolaou, Andreas V.; Demetriou, Victoria L.; Emmanuel, Maria A.; Kakoyiannis, Charalambos K.; Kostrikis, Leondios G.

    2009-05-19

    Abstract Background A fast and simple two-step multiplex real-time PCR assay has been developed to replace the traditional, laborious Salmonella serotyping procedure. Molecular beacons were incorporated into the assay as probes for target DNA...

  20. SYMBOLS FOR TIME = time variable

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    =forever) Cost spent to build variation point i at time i = index over variation points #12;SYMBOLS FOR TIME to account for net present value of money r = assumed interest rate i = index over variation points Cost Expected cost summed over all relevant time intervals Cost spent to build variation point i at time r

  1. Drug Retention Times

    SciTech Connect (OSTI)

    Center for Human Reliability Studies

    2007-05-01

    The purpose of this monograph is to provide information on drug retention times in the human body. The information provided is based on plausible illegal drug use activities that might be engaged in by a recreational drug user

  2. Drug Retention Times

    SciTech Connect (OSTI)

    Center for Human Reliability Studies

    2007-05-01

    The purpose of this monograph is to provide information on drug retention times in the human body. The information provided is based on plausible illegal drug use activities that might be engaged in by a recreational drug user.

  3. Time Valid One-Time Signature for Time-Critical Multicast Data Authentication

    E-Print Network [OSTI]

    Nahrstedt, Klara

    malicious attacks. In this paper, we propose a novel signature model ­ Time Valid One-Time Signature (TVTime Valid One-Time Signature for Time-Critical Multicast Data Authentication Qiyan Wang, Himanshu-OTS) ­ to boost the efficiency of regular one-time signature schemes. Based on the TV-OTS model, we design

  4. Modelling Time

    E-Print Network [OSTI]

    Burra G. Sidharth

    2008-09-03

    We briefly review two concepts of time - the usual time associated with "being" and more recent ideas, answering to the description of "becoming". The approximation involved in the former is examined. Finally we argue that it is (unpredictable) fluctuations that underlie time.

  5. 217 km long distance photon-counting optical time-domain reflectometry based on ultra-low noise up-conversion single photon detector

    E-Print Network [OSTI]

    Guo-Liang Shentu; Qi-Chao Sun; Xiao Jiang; Xiao-Dong Wang; Jason S. Pelc; M. M. Fejer; Qiang Zhang; Jian-Wei Pan

    2013-08-05

    We demonstrate a photon-counting optical time-domain reflectometry with 42.19 dB dynamic range using an ultra-low noise up-conversion single photon detector. By employing the long wave pump technique and a volume Bragg grating, we reduce the noise of our up-conversion single photon detector, and achieve a noise equivalent power of -139.7 dBm/sqrt(Hz). We perform the OTDR experiments using a fiber of length 216.95 km, and show that our system can identify defects along the entire fiber length with a distance resolution better than 10 cm in a measurement time of 13 minutes.

  6. Abstract--In this paper we describe our efforts to build a Web Services based architecture to support both real-time

    E-Print Network [OSTI]

    to support both real-time and archived geographic data in Geographical Information System (GIS) Grids. We IN GEOGRAPHICAL INFORMATION SERVICE GRIDS A. Open Standards for Geographical Information Systems It is estimated]. This is the major reason for enormous interest from industry and academia to develop Geographic Information System

  7. Abstract--We describe our efforts to build a Web Services based architecture to support access to both real-time and

    E-Print Network [OSTI]

    to both real-time and archived geographic data in Geographical Information System (GIS) Grids. We have IN GEOGRAPHICAL INFORMATION SERVICE GRIDS A. Open Standards for Geographical Information Systems It is estimated]. This is the major reason for enormous interest from industry and academia to develop Geographic Information System

  8. A comparison of diagnostic techniques for detecting salmonella spp in equine fecal samples using culture methods, gel-based pcr, and real-time pcr assays 

    E-Print Network [OSTI]

    Smith, Shelle Ann

    2007-09-17

    of presenting complaints .......................... 25 viii LIST OF TABLES TABLE Page 1 Sequence of PCR primers and probe .......................................................... 14 2 Salmonella... serogroups and serotypes detected by the real-time primer/probe sequence................................................................................ 17 3. Frequency and percent negative and positive for culture and PCR procedures...

  9. Quantum Time

    E-Print Network [OSTI]

    John Ashmead

    2010-05-05

    Normally we quantize along the space dimensions but treat time classically. But from relativity we expect a high level of symmetry between time and space. What happens if we quantize time using the same rules we use to quantize space? To do this, we generalize the paths in the Feynman path integral to include paths that vary in time as well as in space. We use Morlet wavelet decomposition to ensure convergence and normalization of the path integrals. We derive the Schr\\"odinger equation in four dimensions from the short time limit of the path integral expression. We verify that we recover standard quantum theory in the non-relativistic, semi-classical, and long time limits. Quantum time is an experiment factory: most foundational experiments in quantum mechanics can be modified in a way that makes them tests of quantum time. We look at single and double slits in time, scattering by time-varying electric and magnetic fields, and the Aharonov-Bohm effect in time.

  10. Anode initiated impulse breakdown in water: the dependence on pulse rise time for nanosecond and sub-nanosecond pulses and initiation mechanism based on electrostriction

    E-Print Network [OSTI]

    Seepersad, Yohan; Dobrynin, Danil

    2015-01-01

    The effect of the voltage rise time on nanosecond and sub-nanosecond impulse breakdown of distilled water is studied. The dependence of anode initiated streamer inception on this parameter is shown to be more intricate than previously reported, particularly as it relates to mechanisms directly in the liquid phase. Dynamics of the emission phase for sub-nanosecond pulses with 600ps rise time are presented to enable comparison with previous work on nanosecond initiation features. Schlieren imaging is also used to show the development of optical density perturbations and rarefactions as a result of electrostriction in the liquid which were previously found for nanosecond pulses as well. The mechanism of nanopore generation in the liquid due to fast impulses proposed by Shneider, Pekker and Fridman is used to explain the results.

  11. Stable a-Si:H-Based Multijunction Solar Cells with Guidance from Real-Time Optics: Final Report, 17 July 1998--16 November 2001

    SciTech Connect (OSTI)

    Wronski, C. R.; Collins, R. W.; Pearce, J. M.; Koval, R. J.; Ferlauto, A. S.; Ferreira, G. M.; Chen C.

    2002-08-01

    This report describes the new insights obtained into the growth of hydrogenated silicon (Si:H) films via real-time spectroscopic ellipsometry (RTSE) measurements. Evolutionary phase diagrams were expanded to include the effects of different deposition conditions, including rf power, pressure, and temperature. Detailed studies of degradation kinetics in thin films and corresponding solar cells have been carried out. Both p-i-n and n-i-p solar cells that incorporate Si:H i-layers deposited with and without H2-dilution have been studied. For the first time, direct and reliable correlations have been obtained between the light-induced changes in thin-film materials and the degradation of the corresponding solar cells.

  12. Time in Quantum Mechanics

    E-Print Network [OSTI]

    Curt A. Moyer

    2013-05-23

    The failure of conventional quantum theory to recognize time as an observable and to admit time operators is addressed. Instead of focusing on the existence of a time operator for a given Hamiltonian, we emphasize the role of the Hamiltonian as the generator of translations in time to construct time states. Taken together, these states constitute what we call a timeline, or quantum history, that is adequate for the representation of any physical state of the system. Such timelines appear to exist even for the semi-bounded and discrete Hamiltonian systems ruled out by Pauli's theorem. However, the step from a timeline to a valid time operator requires additional assumptions that are not always met. Still, this approach illuminates the crucial issue surrounding the construction of time operators, and establishes quantum histories as legitimate alternatives to the familiar coordinate and momentum bases of standard quantum theory.

  13. Phase II of a Six sigma Initiative to Study DWPF SME Analytical Turnaround Times: SRNL's Evaluation of Carbonate-Based Dissolution Methods

    SciTech Connect (OSTI)

    Edwards, Thomas

    2005-09-01

    The Analytical Development Section (ADS) and the Statistical Consulting Section (SCS) of the Savannah River National Laboratory (SRNL) are participating in a Six Sigma initiative to improve the Defense Waste Processing Facility (DWPF) Laboratory. The Six Sigma initiative has focused on reducing the analytical turnaround time of samples from the Slurry Mix Evaporator (SME) by developing streamlined sampling and analytical methods [1]. The objective of Phase I was to evaluate the sub-sampling of a larger sample bottle and the performance of a cesium carbonate (Cs{sub 2}CO{sub 3}) digestion method. Successful implementation of the Cs{sub 2}CO{sub 3} fusion method in the DWPF would have important time savings and convenience benefits because this single digestion would replace the dual digestion scheme now used. A single digestion scheme would result in more efficient operations in both the DWPF shielded cells and the inductively coupled plasma--atomic emission spectroscopy (ICP-AES) laboratory. By taking a small aliquot of SME slurry from a large sample bottle and dissolving the vitrified SME sample with carbonate fusion methods, an analytical turnaround time reduction from 27 hours to 9 hours could be realized in the DWPF. This analytical scheme has the potential for not only dramatically reducing turnaround times, but also streamlining operations to minimize wear and tear on critical shielded cell components that are prone to fail, including the Hydragard{trademark} sampling valves and manipulators. Favorable results from the Phase I tests [2] led to the recommendation for a Phase II effort as outlined in the DWPF Technical Task Request (TTR) [3]. There were three major tasks outlined in the TTR, and SRNL issued a Task Technical and QA Plan [4] with a corresponding set of three major task activities: (1) Compare weight percent (wt%) total solids measurements of large volume samples versus peanut vial samples. (2) Evaluate Cs{sub 2}CO{sub 3} and K{sub 2}CO{sub 3} fusion methods using DWPF simulated glass (part 1) and (to the extent possible) using DWPF radioactive glass (part 2). (3) Recommend specific equipment to implement the new methods and work with SRNL's Equipment Engineering Section (EES) to ensure compatibility of the equipment with the DWPF shielded cells. The focus of this report is major task activity No.2 (parts 1 and 2). The other two major task activities are to be addressed separately. The measurements supporting task activity No.1 are being conducted at the DWPF. EES is currently designing and fabricating the DWPF cell equipment needed for the new method as part of major task activity No.3.

  14. Stable a-Si:H Based Multijunction Solar Cells with Guidance from Real Time Optics: Annual Report, Phase I: 17 July 1998-16 October 1999

    SciTech Connect (OSTI)

    Wronski, C.R.; Collins, R.W.; Jiao, L.; Ferlauto, A.; Rovira, P.I.; Koval, R.J.; Lu, Z.; Niu, X.

    2000-08-29

    This summary describes tasks of novel improved intrinsic materials for multijunction solar cells, insights into improved stability in materials and solar cells, optimization of solar cell performance with improved intrinsic layers, and optimization of multijunction solar cells. The report characterizes a protocrystalline a-Si:H film growth regime where thin samples retain their amorphous state when their growth time or thickness is limited to small values, even when films are deposited with high hydrogen dilution that results in microcrystalline thick films. The Staebler-Wronski degradation kinetics of films and devices are systematically studied as a function of hydrogen dilution.

  15. Kodama time

    E-Print Network [OSTI]

    Abreu, Gabriel

    2010-01-01

    In a general time-dependent (3+1)-dimensional spherically symmetric spacetime, the so-called Kodama vector is a naturally defined geometric quantity that is timelike outside the evolving horizon and so defines a preferred class of fiducial observers. However the Kodama vector does not by itself define any preferred notion of time. We demonstrate that a preferred time coordinate - which we shall call Kodama time - can be introduced by taking the additional step of applying the Clebsch decomposition theorem to the Kodama vector. We thus construct a geometrically preferred coordinate system for any time-dependent spherically symmetric spacetime, and explore its properties. In particular we use this formalism to construct a general class of conservation laws, generalizing Kodama's energy flux. We study the geometrically preferred fiducial observers, and demonstrate that it is possible to define and calculate a generalized notion of surface gravity that is valid throughout the entire evolving spacetime. Furthermor...

  16. A method for in situ absolute DD yield calibration of neutron time-of-flight detectors on OMEGA using CR-39-based proton detectors

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

    Waugh, C. J.; Rosenberg, M. J.; Zylstra, A. B.; Frenje, J. A.; Seguin, F. H.; Petrasso, R. D.; Glebov, V. Yu.; Sangster, T. C.; Stoeckl, C.

    2015-05-27

    Neutron time of flight (nTOF) detectors are used routinely to measure the absolute DD neutron yield at OMEGA. To check the DD yield calibration of these detectors, originally calibrated using indium activation systems, which in turn were cross-calibrated to NOVA nTOF detectors in the early 1990s, a direct in situ calibration method using CR-39 range filter proton detectors has been successfully developed. By measuring DD neutron and proton yields from a series of exploding pusher implosions at OMEGA, a yield calibration coefficient of 1.09 ± 0.02 (relative to the previous coefficient) was determined for the 3m nTOF detector. In addition,more »comparison of these and other shots indicates that significant reduction in charged particle flux anisotropies is achieved when bang time occurs significantly (on the order of 500 ps) after the trailing edge of the laser pulse. This is an important observation as the main source of the yield calibration error is due to particle anisotropies caused by field effects. The results indicate that the CR-39-nTOF in situ calibration method can serve as a valuable technique for calibrating and reducing the uncertainty in the DD absolute yield calibration of nTOF detector systems on OMEGA, the National Ignition Facility, and laser megajoule.« less

  17. A method for in situ absolute DD yield calibration of neutron time-of-flight detectors on OMEGA using CR-39-based proton detectors

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

    Waugh, C. J.; Rosenberg, M. J.; Zylstra, A. B.; Frenje, J. A.; Seguin, F. H.; Petrasso, R. D.; Glebov, V. Yu.; Sangster, T. C.; Stoeckl, C.

    2015-05-01

    Neutron time of flight (nTOF) detectors are used routinely to measure the absolute DD neutron yield at OMEGA. To check the DD yield calibration of these detectors, originally calibrated using indium activation systems, which in turn were cross-calibrated to NOVA nTOF detectors in the early 1990s, a direct in situ calibration method using CR-39 range filter proton detectors has been successfully developed. By measuring DD neutron and proton yields from a series of exploding pusher implosions at OMEGA, a yield calibration coefficient of 1.09 ± 0.02 (relative to the previous coefficient) was determined for the 3m nTOF detector. In addition,more »comparison of these and other shots indicates that significant reduction in charged particle flux anisotropies is achieved when bang time occurs significantly (on the order of 500 ps) after the trailing edge of the laser pulse. This is an important observation as the main source of the yield calibration error is due to particle anisotropies caused by field effects. The results indicate that the CR-39-nTOF in situ calibration method can serve as a valuable technique for calibrating and reducing the uncertainty in the DD absolute yield calibration of nTOF detector systems on OMEGA, the National Ignition Facility, and laser megajoule.« less

  18. A method for in situ absolute DD yield calibration of neutron time-of-flight detectors on OMEGA using CR-39-based proton detectors

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

    Waugh, C. J. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Rosenberg, M. J. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Zylstra, A. B. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Frenje, J. A. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Seguin, F. H. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Petrasso, R. D. [MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States).; Glebov, V. Yu. [Lab. for Laser Energetics, Rochester, NY (United States); Sangster, T. C. [Lab. for Laser Energetics, Rochester, NY (United States); Stoeckl, C. [Lab. for Laser Energetics, Rochester, NY (United States)

    2015-05-01

    Neutron time of flight (nTOF) detectors are used routinely to measure the absolute DD neutron yield at OMEGA. To check the DD yield calibration of these detectors, originally calibrated using indium activation systems, which in turn were cross-calibrated to NOVA nTOF detectors in the early 1990s, a direct in situ calibration method using CR-39 range filter proton detectors has been successfully developed. By measuring DD neutron and proton yields from a series of exploding pusher implosions at OMEGA, a yield calibration coefficient of 1.09 ± 0.02 (relative to the previous coefficient) was determined for the 3m nTOF detector. In addition, comparison of these and other shots indicates that significant reduction in charged particle flux anisotropies is achieved when bang time occurs significantly (on the order of 500 ps) after the trailing edge of the laser pulse. This is an important observation as the main source of the yield calibration error is due to particle anisotropies caused by field effects. The results indicate that the CR-39-nTOF in situ calibration method can serve as a valuable technique for calibrating and reducing the uncertainty in the DD absolute yield calibration of nTOF detector systems on OMEGA, the National Ignition Facility, and laser megajoule.

  19. Multifunctional Nanowire/film Composites based Bi-modular Sensors for In-situ and Real-time High Temperature Gas Detection

    SciTech Connect (OSTI)

    Gao, Pu-Xian; Lei, Yu

    2013-06-01

    This final report to the Department of Energy/National Energy Technology Laboratory for DE-FE0000870 covers the period from 2009 to June, 2013 and summarizes the main research accomplishments, which can be divided in sensing materials innovation, bimodular sensor demonstration, and new understanding and discoveries. As a matter of fact, we have successfully completed all the project tasks in June 1, 2013, and presented the final project review presentation on the 9th of July, 2013. Specifically, the major accomplishments achieved in this project include: 1) Successful development of a new class of high temperature stable gas sensor nanomaterials based on composite nano-array strategy in a 3D or 2D fashion using metal oxides and perovskite nanostructures. 2) Successful demonstration of bimodular nanosensors using 2D nanofibrous film and 3D composite nanowire arrays using electrical resistance mode and electrochemical electromotive force mode. 3) Series of new discoveries and understandings based on the new composite nanostructure platform toward enhancing nanosensor performance in terms of stability, selectivity, sensitivity and mass flux sensing. In this report, we highlight some results toward these accomplishments.

  20. Photon-counting Brillouin optical time-domain reflectometry based on up-conversion detector and fiber Fabry-Perot scanning interferometer

    E-Print Network [OSTI]

    Haiyun Xia; Mingjia Shangguan; Guoliang Shentu; Chong Wang; Jiawei Qiu; Xiuxiu Xia; Chao Chen; Mingyang Zheng; Xiuping Xie; Qiang Zhang; Xiankang Dou; Jianwei Pan

    2015-04-06

    A direct-detection Brillouin optical time-domain reflectometry (BOTDR) is proposed and demonstrated by using an up-conversion single-photon detector and a fiber Fabry-Perot scanning interferometer (FFP-SI). Taking advantage of high signal-to-noise ratio of the detector and high spectrum resolution of the FFP-SI, the Brillouin spectrum along a polarization maintaining fiber (PMF) is recorded on a multiscaler with a small data size directly. In contrast with conventional BOTDR adopting coherent detection, photon-counting BOTDR is simpler in structure and easier in data processing. In the demonstration experiment, characteristic parameters of the Brillouin spectrum including its power, spectral width and frequency center are analyzed simultaneously along a 10 km PMF at different temperature and stain conditions.

  1. Chow Time 

    E-Print Network [OSTI]

    Unknown

    2011-09-05

    -1 THE PREDICTION OF BUS ARRIVAL TIME USING AUTOMATIC VEHICLE LOCATION SYSTEMS DATA A Dissertation by RAN HEE JEONG Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of DOCTOR OF PHILOSOPHY December 2004 Major Subject: Civil Engineering THE PREDICTION OF BUS ARRIVAL TIME USING AUTOMATIC VEHICLE LOCATION SYSTEMS DATA A Dissertation by RAN HEE JEONG Submitted to Texas A...

  2. Spot evolution on the red giant star XX Triangulum. A starspot-decay analysis based on time-series Doppler imaging

    E-Print Network [OSTI]

    Künstler, A; Strassmeier, K G

    2015-01-01

    Solar spots appear to decay linearly proportional to their size. The decay rate of solar spots is directly related to magnetic diffusivity, which itself is a key quantity for the length of a magnetic-activity cycle. Is a linear spot decay also seen on other stars, and is this in agreement with the large range of solar and stellar activity cycle lengths? We investigate the evolution of starspots on the rapidly-rotating ($P_{\\rm rot}$ $\\approx$ 24 d) K0 giant XX Tri, using consecutive time-series Doppler images. Our aim is to obtain a well-sampled movie of the stellar surface over many years, and thereby detect and quantify a starspot decay law for further comparison with the Sun. We obtained continuous high-resolution and phase-resolved spectroscopy with the 1.2-m robotic STELLA telescope on Tenerife over six years. For each observing season, we obtained between 5 to 7 independent Doppler images, one per stellar rotation, making up a total of 36 maps. To quantify starspot area decay and growth, we match the ob...

  3. Time translation of quantum properties

    E-Print Network [OSTI]

    L. Vanni; R. Laura

    2008-12-03

    Based on the notion of time translation, we develop a formalism to deal with the logic of quantum properties at different times. In our formalism it is possible to enlarge the usual notion of context to include composed properties involving properties at different times. We compare our results with the theory of consistent histories.

  4. Modeling of optical amplifier waveguide based on silicon nanostructures and rare earth ions doped silica matrix gain media by a finite-difference time-domain method: comparison of achievable gain with Er3+ or Nd3+ ions dopants

    E-Print Network [OSTI]

    Cardin, Julien; Dufour, Christian; Gourbilleau, Fabrice

    2015-01-01

    A comparative study of the gain achievement is performed in a waveguide optical amplifier whose active layer is constituted by a silica matrix containing silicon nanograins acting as sensitizer of either neodymium ions (Nd 3+) or erbium ions (Er 3+). Due to the large difference between population levels characteristic times (ms) and finite-difference time step (10 --17 s), the conventional auxiliary differential equation and finite-difference time-domain (ADE-FDTD) method is not appropriate to treat such systems. Consequently, a new two loops algorithm based on ADE-FDTD method is presented in order to model this waveguide optical amplifier. We investigate the steady states regime of both rare earth ions and silicon nanograins levels populations as well as the electromagnetic field for different pumping powers ranging from 1 to 10 4 mW.mm-2. Furthermore, the three dimensional distribution of achievable gain per unit length has been estimated in this pumping range. The Nd 3+ doped waveguide shows a higher gross...

  5. Time irreversible copula-based Markov Models

    E-Print Network [OSTI]

    Beare, Brendan K.; Seo, Juwon

    2012-01-01

    1008. Fentaw, A. and Naik-Nimbalkar, U. V. (2008). Dynamicinclude Fentaw and Naik- Nimbalkar (2008), Gagliardini and

  6. Dispatch R427 Time perception: Brain time or event time?

    E-Print Network [OSTI]

    Johnston, Alan

    Dispatch R427 Time perception: Brain time or event time? Alan Johnston* and Shin'ya Nishida Recent experiments show that synchronous events can appear to an observer to occur at different times. Neural processing time delays are offered as an explanation of these temporal illusions, but equating perceived time

  7. “Open Hatch” Tour of Offshore Wind Buoy- Text Alt Version

    Broader source: Energy.gov [DOE]

    Wind and Water Power Technologies Office Director, Jose Zayas gives a behind the scenes tour of the AXYS WindSentinel research buoy, which uses high-tech instruments to measure conditions for potential offshore wind energy development.

  8. Bioenergy in a Multifunctional Landscape- Text-Alt Version

    Broader source: Energy.gov [DOE]

    How can our landscapes be managed most effectively to produce crops for food, feed, and bioenergy, while also protecting our water resources by preventing the loss of nutrients from the soil? Dr. Cristina Negri and her team at the U.S. Department of Energy’s Argonne National Laboratory are tackling this question at an agricultural research site located in Fairbury, Illinois.

  9. advanced_biofuels_pathways_webinar_alt_text.doc | Department...

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

    advancedbiofuelspathwayswebinaralttext.doc advancedbiofuelspathwayswebinaralttext.doc advancedbiofuelspathwayswebinaralttext.doc advancedbiofuelspathwayswebinara...

  10. Connected Outdoor Lighting Systems for Municipalities- Text-Alt Version

    Broader source: Energy.gov [DOE]

    Welcome, everyone. This is Bruce Kinzey with the Pacific Northwest National Laboratory and director of the U.S. Department of Energy's Municipal Solid-State Street Lighting Consortium. Welcome to...

  11. Growing and Sustaining Communities with Bioenergy- Text-Alt Version

    Broader source: Energy.gov [DOE]

    From Vero Beach, Florida, to Hugoton, Kansas, to Emmetsburg, Iowa, cellulosic ethanol biorefineries have had major impacts on communities and their residents. In other areas, bioenergy has significant potential to transform current and establish new industry. This short video illustrates how biorefineries and other bioenergy developments can benefit citizens, businesses, and whole communities, helping America’s rural economies grow and thrive.

  12. NREL Alt Fuel Lessons Learned: Hydrogen Infrastructure | 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 RankADVANCED MANUFACTURING OFFICESpecialAPPENDIX FOrigin ofAllen LichvarAREVA NOPRDepartmentof4

  13. Time Management Managing Time and Tasks

    E-Print Network [OSTI]

    Kunkle, Tom

    Time Management Managing Time and Tasks What is time management? Time can't be managed ­ but you can manage the amount of time you use each day for fun, work, rest, and time spent with others. Why is time management important? You have responsibilities to yourself, to your family and friends, to your

  14. The LCLS Timing Event System

    SciTech Connect (OSTI)

    Dusatko, John; Allison, S.; Browne, M.; Krejcik, P.; /SLAC

    2012-07-23

    The Linac Coherent Light Source requires precision timing trigger signals for various accelerator diagnostics and controls at SLAC-NAL. A new timing system has been developed that meets these requirements. This system is based on COTS hardware with a mixture of custom-designed units. An added challenge has been the requirement that the LCLS Timing System must co-exist and 'know' about the existing SLC Timing System. This paper describes the architecture, construction and performance of the LCLS timing event system.

  15. STARBASE: MANAGING CONTENTION AND TIMING

    E-Print Network [OSTI]

    Son, Sang H.

    systems (RT­DBMS) has primarily based on simulation. This chapter discusses how current real­time technology has been applied to architect an actual RT­DBMS on a real­time microkernel operating system. A real RT­DBMS must confront many practical issues which simulations typically ignore: race conditions

  16. UGE Scheduler Cycle Time

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

    UGE Scheduler Cycle Time UGE Scheduler Cycle Time Genepool Cycle Time Genepool Daily Genepool Weekly Phoebe Cycle Time Phoebe Daily Phoebe Weekly What is the Scheduler Cycle? The...

  17. Time and Labor Manual -Time Keepers -LSUSH

    E-Print Network [OSTI]

    Time and Labor Manual - Time Keepers - LSUSH Version Date: July 2012 #12;COPYRIGHT & TRADEMARKS create a risk of personal injury. If you use this software in dangerous applications, then you shall Guide Time and Labor Manual - Time Keepers - LSUSH Page iii Table of Contents Time and Labor Manual

  18. Time Commitments Where Does Your Time Go

    E-Print Network [OSTI]

    Kunkle, Tom

    Time Commitments Where Does Your Time Go Everyone starts the week with the same number of hours. So, why does your time go so fast? Let's find out! Number of hours of sleep each night ____ x 7 preparation/clean-up time) ____ x 7 = ____ Travel time to and from campus ___ x __ = ____ Number of hours per

  19. San Pablo Avenue Pedestrian Signal Timing Optimization

    E-Print Network [OSTI]

    Nguyen, Ahn; Ragland, David R.

    2007-01-01

    Signals to Accommodate Pedestrian Travel. Road EngineeringM. Cynecki. A Review of Pedestrian Safety Research in theWalking Speeds for Pedestrian Clearance Timing Based on

  20. On the Flow of Time

    E-Print Network [OSTI]

    George F R Ellis

    2008-12-01

    Current theoretical physics suggests the flow of time is an illusion: the entire universe just is, with no special meaning attached to the present time. This paper points out that this view, in essence represented by usual space-time diagrams, is based on time-reversible microphysical laws, which fail to capture essential features of the time-irreversible nature of decoherence and the quantum measurement process, as well as macro-physical behaviour and the development of emergent complex systems, including life, which exist in the real universe. When these are taken into account, the unchanging block universe view of spacetime is best replaced by an evolving block universe which extends as time evolves, with the potential of the future continually becoming the certainty of the past; spacetime itself evolves, as do the entities within it. However this time evolution is not related to any preferred surfaces in spacetime; rather it is associated with the evolution of proper time along families of world lines. The default state of fundamental physics should not be taken to be a time irreversible evolution of physical states: it is an ongoing irreversible development of time itself.

  1. Time parallel gravitational collapse simulation

    E-Print Network [OSTI]

    Kreienbuehl, Andreas; Ruprecht, Daniel; Krause, Rolf

    2015-01-01

    This article demonstrates the applicability of the parallel-in-time method Parareal to the numerical solution of the Einstein gravity equations for the spherical collapse of a massless scalar field. To account for the shrinking of the spatial domain in time, a tailored load balancing scheme is proposed and compared to load balancing based on number of time steps alone. The performance of Parareal is studied for both the sub-critical and black hole case; our experiments show that Parareal generates substantial speedup and, in the super-critical regime, can also reproduce the black hole mass scaling law.

  2. The time-rescaling interval model: extending conditional-intensity based models of neural spike trains Jonathan W. Pillow Depts. of Psychology & Neurobiology, The University of Texas at Austin

    E-Print Network [OSTI]

    Pillow, Jonathan

    . Acknowledgments 9. Conclusions · Conditional renewal (CR) process model incorporates real-time and rescaled dependencies between ISIs can also be modeled using conditional renewal densities 4. Time-rescaling theorem of conditional renewal model 8. Application to retinal data 7. Removing serial dependencies 2. Incorporating

  3. Time-Dependent Lagrangian Biomechanics

    E-Print Network [OSTI]

    Ivancevic, Tijana T

    2009-01-01

    In this paper we present the time-dependent generalization of an 'ordinary' autonomous human musculo-skeletal biomechanics. We start with the configuration manifold of human body, given as a set of its all active degrees of freedom (DOF). This is a Riemannian manifold with a material metric tensor given by the total mass-inertia matrix of the human body segments. This is the base manifold for standard autonomous biomechanics. To make its time-dependent generalization, we need to extend it with a real time axis. On this extended configuration space we develop time-dependent biomechanical Lagrangian dynamics, using derived jet spaces of velocities and accelerations, as well as the underlying geometric evolution of the mass-inertia matrix. Keywords: Human time-dependent biomechanics, configuration manifold, jet spaces, geometric evolution

  4. Time Crystals from Minimum Time Uncertainty

    E-Print Network [OSTI]

    Mir Faizal; Mohammed M. Khalil; Saurya Das

    2014-12-29

    Motivated by the Generalized Uncertainty Principle, covariance, and a minimum measurable time, we propose a deformation of the Heisenberg algebra, and show that this leads to corrections to all quantum mechanical systems. We also demonstrate that such a deformation implies a discrete spectrum for time. In other words, time behaves like a crystal.

  5. The TESLA Time Projection Chamber

    E-Print Network [OSTI]

    Nabil Ghodbane

    2002-12-12

    A large Time Projection Chamber is proposed as part of the tracking system for a detector at the TESLA electron positron linear collider. Different ongoing R&D studies are reviewed, stressing progress made on a new type readout technique based on Micro-Pattern Gas Detectors.

  6. Manage Your Time 

    E-Print Network [OSTI]

    White, Lynn

    2000-06-27

    People view time in different ways, but we all could do a better job of managing our time. This publication explains three different time management tools: the 24-hour time log and chart; a self-assessment of thinking styles and time management...

  7. Time-to-Produce, Inventory, and Asset Prices 

    E-Print Network [OSTI]

    Chen, Zhanhui

    2012-10-19

    In a production-based general equilibrium model, I study the impact of time-to-build and time-to-produce technology constraints and inventory on asset prices and macroeconomic quantity dynamics. A time-to-build constraint ...

  8. On Time. 6b: Quantum Mechanical Time

    E-Print Network [OSTI]

    C. K. Raju

    2008-08-09

    The existence of small amounts of advanced radiation, or a tilt in the arrow of time, makes the basic equations of physics mixed-type functional differential equations. The novel features of such equations point to a microphysical structure of time. This corresponds to a change of logic at the microphysical level. We show that the resulting logic is a quantum logic. This provides a natural and rigorous explanation of quantum interference. This structured-time interpretation of quantum mechanics is briefly compared with various other interpretations of q.m.

  9. Times Higher Education -Top 10 researchers in chemistry based on total citations http://www.timeshighereducation.co.uk/story.asp?storyCode=403915[4/19/2009 6:13:57 PM

    E-Print Network [OSTI]

    Yaghi, Omar M.

    Search Jobs Search Archive Advanced Search All roles All locations Top 10 researchers in chemistry based COMMENT CAREER LEGAL BOOKS STATS ADVERTISE JOBS EVENTS MAGAZINE SUBSCRIBE Enter your keyword All roles All://www.timeshighereducation.co.uk/story.asp?storyCode=403915[4/19/2009 6:13:57 PM] © 2007 TSL Education Ltd. Contact us Feedback Terms & conditions Privacy

  10. Yet another time about time - Part I

    E-Print Network [OSTI]

    Plamen L. Simeonov

    2015-08-29

    This paper presents yet another personal reflection on one the most important concepts in both science and the humanities: time. This elusive notion has been not only bothering philosophers since Plato and Aristotle. It goes throughout human history embracing all analytical and creative (anthropocentric) disciplines. Time has been a central theme in physical and life sciences, philosophy, psychology, music, art and many more. This theme is known with a vast body of knowledge across different theories and categories. What has been explored concerns its nature (rational, irrational, arational), appearances/qualia, degrees, dimensions and scales of conceptualization (internal, external, fractal, discrete, continuous, mechanical, quantum, local, global, etc.). Of particular interest have been parameters of time such as duration ranges, resolutions, modes (present, now, past, future), varieties of tenses (e.g. present perfect, present progressive, etc.) and some intuitive, but also fancy phenomenological characteristics such as arrow, stream, texture, width, depth, density, even scent. Perhaps the most distinct characteristic of this fundamental concept is the absolute time constituting the flow of consciousness according to Husserl, the reflection of pure (human) nature without having the distinction between exo and endo. This essay is a personal reflection upon the meaning of time in modern physics and phenomenological philosophy.

  11. Universal Time Tunneling

    E-Print Network [OSTI]

    Guenter Nimtz

    2009-01-26

    How much time does a tunneling wave packet spent in traversing a barrier? Quantum mechanical calculations result in zero time inside a barrier . In the nineties analogous tunneling experiments with microwaves were carried out. The results agreed with quantum mechanical calculations. Electron tunneling time is hard to measure being extremely short and parasitic effects due to the electric charge of electrons may be dominant. However, quite recently the atomic ionization tunneling time has been measured. Experimental data of photonic, phononic, and electronic tunneling time is available now and will be presented. It appears that the tunneling time is a universal property independent of the field in question.

  12. Unfolding of time Petri nets for quantitative time analysis Medesu Sogbohossou and David Delfieu

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    are interesting formalism with expressing power of true parallelism or concurrency in discrete events systems. Time Petri nets (TPN) [1] are timed extension often used to modelize realtime systems. Thanks://www.irccyn.ec-nantes.fr Abstract. The verification of properties on a Time Petri net is often based on the state class graph

  13. Time Asymmetric Quantum Physics

    E-Print Network [OSTI]

    A. Bohm

    1999-02-26

    Mathematical and phenomenological arguments in favor of asymmetric time evolution of micro-physical states are presented.

  14. Comparative toxicity of pentachlorophenol to three earthworm species in artificial soil

    SciTech Connect (OSTI)

    Fitzgerald, D.; Lanno, R.P.; Farwell, A.; Dixon, D.G.

    1994-12-31

    Although methods for standardized toxicity tests with earthworms exist, many of the test parameters and conditions have not been validated in actual tests and with different species of worms. This study evaluated the toxicity of pentachlorophenol (PCP) to three species of earthworms, Lumbricus terrestris, Eisenia fetida, and Eudrilus eugeniae using various methods of data analysis and body residues. Tests were conducted in artificial soil for a period of 28 days or until an Acute Lethality Threshold (ALT) was reached. An intensive temporal sampling regime was applied to generate sufficient data for the accurate estimation of ALTs using both LC50/time and time-to-death/soil concentration methods of data analysis. L. terrestris was tested at 15 C, E. eugeniae at 24 C, and E. fetida at both temperatures. Total body residues of PCP were measured by GC following cryogenic separation of the lipid fraction of the worm. ALTs were significantly different between E. fetida and the two larger species of worms. No effect of temperature on the ALT for E. fetida was observed, although the time taken to reach the ALT increased at the lower temperature. The relationship of PCP residues at mortality will be discussed in terms of the effects of species, body size and temperature. Limitations of the artificial soil based upon growth curves of worms will also be examined.

  15. Service based logistics optimization

    E-Print Network [OSTI]

    Price, Gregory D., Jr

    2014-01-01

    This thesis explores the use of a service based logistics optimization (SBLO) methodology for an inbound reverse logistics network. Currently, Quest Diagnostics solves the vehicle routing problem with time windows (VRPTW) ...

  16. Noncommutative Two Time Physics

    E-Print Network [OSTI]

    W. Chagas-Filho

    2006-05-10

    We present a classical formalism describing two-time physics with Abelian canonical gauge field backgrounds. The formalism can be used as a starting point for the construction of an interacting quantized two-time physics theory in a noncommutative soace-time.

  17. Time-periodic universes

    E-Print Network [OSTI]

    De-Xing Kong; Kefeng Liu; Ming Shen

    2008-08-30

    In this letter we construct a new time-periodic solution of the vacuum Einstein's field equations whose Riemann curvature norm takes the infinity at some points. We show that this solution is intrinsically time-periodic and describes a time-periodic universe with the "black hole". New physical phenomena are investigated and new singularities are analyzed for this universal model.

  18. Ultrafast supercontinuum fiber-laser based pump-probe scanning magneto-optical Kerr effect microscope for the investigation of electron spin dynamics in semiconductors at cryogenic temperatures with picosecond time and micrometer spatial resolution

    SciTech Connect (OSTI)

    Henn, T.; Kiessling, T., E-mail: tobias.kiessling@physik.uni-wuerzburg.de; Ossau, W.; Molenkamp, L. W. [Physikalisches Institut (EP3), Universität Würzburg, 97074 Würzburg (Germany)] [Physikalisches Institut (EP3), Universität Würzburg, 97074 Würzburg (Germany); Biermann, K.; Santos, P. V. [Paul-Drude-Institut für Festkörperelektronik, 10117 Berlin (Germany)] [Paul-Drude-Institut für Festkörperelektronik, 10117 Berlin (Germany)

    2013-12-15

    We describe a two-color pump-probe scanning magneto-optical Kerr effect microscope which we have developed to investigate electron spin phenomena in semiconductors at cryogenic temperatures with picosecond time and micrometer spatial resolution. The key innovation of our microscope is the usage of an ultrafast “white light” supercontinuum fiber-laser source which provides access to the whole visible and near-infrared spectral range. Our Kerr microscope allows for the independent selection of the excitation and detection energy while avoiding the necessity to synchronize the pulse trains of two separate picosecond laser systems. The ability to independently tune the pump and probe wavelength enables the investigation of the influence of excitation energy on the optically induced electron spin dynamics in semiconductors. We demonstrate picosecond real-space imaging of the diffusive expansion of optically excited electron spin packets in a (110) GaAs quantum well sample to illustrate the capabilities of the instrument.

  19. Absolute Time Derivatives

    E-Print Network [OSTI]

    T. Matolcsi; P. Van

    2006-10-23

    A four dimensional treatment of nonrelativistic space-time gives a natural frame to deal with objective time derivatives. In this framework some well known objective time derivatives of continuum mechanics appear as Lie-derivatives. Their coordinatized forms depends on the tensorial properties of the relevant physical quantities. We calculate the particular forms of objective time derivatives for scalars, vectors, covectors and different second order tensors from the point of view of a rotating observer. The relation of substantial, material and objective time derivatives is treated.

  20. Measuring time with physical clocks

    E-Print Network [OSTI]

    Esteban Castro-Ruiz; Flaminia Giacomini; ?aslav Brukner

    2015-07-07

    In general relativity, the picture of spacetime assigns an ideal clock to each spacetime point. Being ideal, gravitational effects due to these clocks are ignored and the flow of time according to one clock is not affected by the presence of surrounding clocks. However, if time is defined operationally, as a pointer position of a physical clock that obeys the laws of quantum mechanics and general relativity, such a picture is at most a convenient fiction. We show that the mass-energy equivalence implies gravitational interaction between the clocks, while the superposition of energy eigenstates leads to a non-fixed metric background. Based only on the assumption that both quantum mechanics and general relativity are valid in this situation, we show that the clocks necessarily get entangled through time dilation effect, which eventually leads to a loss of coherence of a single clock. Hence, the time as measured by a single clock is not well-defined. However, the general relativistic notion of time is recovered in the classical limit of clocks.

  1. Time scales in LISA

    E-Print Network [OSTI]

    S. Pireaux

    2007-03-23

    The LISA mission is a space interferometer aiming at the detection of gravitational waves in the [$10^{-4}$,$10^{-1}$] Hz frequency band. In order to reach the gravitational wave detection level, a Time Delay Interferometry (TDI) method must be applied to get rid of (most of) the laser frequency noise and optical bench noise. This TDI analysis is carried out in terms of the coordinate time corresponding to the Barycentric Coordinate Reference System (BCRS), TCB, whereas the data at each of the three LISA stations is recorded in terms of each station proper time. We provide here the required proper time versus BCRS time transformation. We show that the difference in rate of station proper time versus TCB is of the order of $5 10^{-8}$. The difference between station proper times and TCB exhibits an oscillatory trend with a maximum amplitude of about $10^{-3}$ s.

  2. The Parkes Pulsar Timing Array

    E-Print Network [OSTI]

    R. N. Manchester

    2007-11-12

    Detection and study of gravitational waves from astrophysical sources is a major goal of current astrophysics. Ground-based laser-interferometer systems such as LIGO and VIRGO are sensitive to gravitational waves with frequencies of order 100 Hz, whereas space-based systems such as LISA are sensitive in the millihertz regime. Precise timing observations of a sample of millisecond pulsars widely distributed on the sky have the potential to detect gravitational waves at nanohertz frequencies. Potential sources of such waves include binary super-massive black holes in the cores of galaxies, relic radiation from the inflationary era and oscillations of cosmic strings. The Parkes Pulsar Timing Array (PPTA) is an implementation of such a system in which 20 millisecond pulsars have been observed using the Parkes radio telescope at three frequencies at intervals of two -- three weeks for more than two years. Analysis of these data has been used to limit the gravitational wave background in our Galaxy and to constrain some models for its generation. The data have also been used to investigate fluctuations in the interstellar and Solar-wind electron density and have the potential to investigate the stability of terrestrial time standards and the accuracy of solar-system ephemerides.

  3. Matter: Space without Time

    E-Print Network [OSTI]

    Yousef Ghazi-Tabatabai

    2012-11-19

    While Quantum Gravity remains elusive and Quantum Field Theory retains the interpretational difficulties of Quantum Mechanics, we have introduced an alternate approach to the unification of particles, fields, space and time, suggesting that the concept of matter as space without time provides a framework which unifies matter with spacetime and in which we anticipate the development of complete theories (ideally a single unified theory) describing observed 'particles, charges, fields and forces' solely with the geometry of our matter-space-time universe.

  4. Intrinsic Time Quantum Geometrodynamics

    E-Print Network [OSTI]

    Eyo Eyo Ita III; Chopin Soo; Hoi-Lai Yu

    2015-02-06

    Quantum Geometrodynamics with intrinsic time development and momentric variables is presented. An underlying SU(3) group structure at each spatial point regulates the theory. The intrinsic time behavior of the theory is analyzed, together with its ground state and primordial quantum fluctuations. Cotton-York potential dominates at early times when the universe was small; the ground state naturally resolves Penrose's Weyl Curvature Hypothesis, and thermodynamic and gravitational `arrows of time' point in the same direction. Ricci scalar potential corresponding to Einstein's General Relativity emerges as a zero-point energy contribution. A new set of fundamental commutation relations without Planck's constant emerges from the unification of Gravitation and Quantum Mechanics.

  5. SLH Timing Belt Powertrain

    SciTech Connect (OSTI)

    Schneider, Abe

    2014-04-09

    The main goal of this proposal was to develop and test a novel powertrain solution for the SLH hydroEngine?, a low-cost, efficient low-head hydropower technology. Nearly two-thirds of U.S. renewable electricity is produced by hydropower (EIA 2010). According to the U.S. Department of Energy; this amount could be increased by 50% with small hydropower plants, often using already-existing dams (Hall 2004). There are more than 80,000 existing dams, and of these, less than 4% generate power (Blankinship 2009). In addition, there are over 800 irrigation districts in the U.S., many with multiple, non-power, low-head drops. These existing, non-power dams and irrigation drops could be retrofitted to produce distributed, baseload, renewable energy with appropriate technology. The problem is that most existing dams are low-head, or less than 30 feet in height (Ragon 2009). Only about 2% of the available low-head hydropower resource in the U.S. has been developed, leaving more than 70 GW of annual mean potential low-head capacity untapped (Hall 2004). Natel Energy, Inc. is developing a low-head hydropower turbine that operates efficiently at heads less than 6 meters and is cost-effective for deployment across multiple low-head structures. Because of the unique racetrack-like path taken by the prime-movers in the SLH, a flexible powertrain is required. Historically, the only viable technological solution was roller chain. Despite the having the ability to easily attach blades, roller chain is characterized by significant drawbacks, including high cost, wear, and vibration from chordal action. Advanced carbon-#12;fiber-reinforced timing belts have been recently developed which, coupled with a novel belt attachment system developed by Natel Energy, result in a large reduction in moving parts, reduced mass and cost, and elimination of chordal action for increased fatigue life. The work done in this project affirmatively addressed each of the following 3 major uncertainties concerning a timing-belt based hydroEngine ?powertrain: 1. Can a belt handle the high torques and power loads demanded by the SLH? (Yes.) 2. Can the SLH blades be mounted to belt with a connection that can withstand the loads encountered in operation? (Yes.) 3. Can the belt, with blade attachments, live through the required cyclic loading? (Yes.) The research adds to the general understanding of sustainable small hydropower systems by using innovative system testing to develop and demonstrate performance of a novel powertrain solution, enabling a new type of hydroelectric turbine to be commercially developed. The technical effectiveness of the methods investigated has been shown to be positive through an extensive design and testing process accommodating many constraints and goals, with a major emphasis on high cycle fatigue life. Economic feasibility of the innovations has been demonstrated through many iterations of design for manufacturability and cost reduction. The project is of benefit to the public because it has helped to develop a solution to a major problem -- despite the large available potential for new low-head hydropower, high capital costs and high levelized cost of electricity (LCOE) continue to be major barriers to project development. The hydroEngine? represents a significant innovation, leveraging novel fluid mechanics and mechanical configuration to allow lower-cost turbine manufacture and development of low head hydropower resources.

  6. Time functions as utilities

    E-Print Network [OSTI]

    E. Minguzzi

    2009-09-04

    Every time function on spacetime gives a (continuous) total preordering of the spacetime events which respects the notion of causal precedence. The problem of the existence of a (semi-)time function on spacetime and the problem of recovering the causal structure starting from the set of time functions are studied. It is pointed out that these problems have an analog in the field of microeconomics known as utility theory. In a chronological spacetime the semi-time functions correspond to the utilities for the chronological relation, while in a K-causal (stably causal) spacetime the time functions correspond to the utilities for the K^+ relation (Seifert's relation). By exploiting this analogy, we are able to import some mathematical results, most notably Peleg's and Levin's theorems, to the spacetime framework. As a consequence, we prove that a K-causal (i.e. stably causal) spacetime admits a time function and that the time or temporal functions can be used to recover the K^+ (or Seifert) relation which indeed turns out to be the intersection of the time or temporal orderings. This result tells us in which circumstances it is possible to recover the chronological or causal relation starting from the set of time or temporal functions allowed by the spacetime. Moreover, it is proved that a chronological spacetime in which the closure of the causal relation is transitive (for instance a reflective spacetime) admits a semi-time function. Along the way a new proof avoiding smoothing techniques is given that the existence of a time function implies stable causality, and a new short proof of the equivalence between K-causality and stable causality is given which takes advantage of Levin's theorem and smoothing techniques.

  7. Time Domain Reflectometry Theory

    E-Print Network [OSTI]

    Palermo, Sam

    Time Domain Reflectometry Theory Application Note 1304-2 For Use with Agilent 86100 Infiniium DCA #12;2 The most general approach to evaluating the time domain response of any electromagnetic system a concise presentation of the fundamentals of TDR and then relates these fundamentals to the parameters

  8. Gauge Gravity and Space-Time

    E-Print Network [OSTI]

    Ning Wu

    2012-07-11

    When we discuss problems on gravity, we can not avoid some fundamental physical problems, such as space-time, inertia, and inertial reference frame. The goal of this paper is to discuss the logic system of gravity theory and the problems of space-time, inertia, and inertial reference frame. The goal of this paper is to set up the theory on space-time in gauge theory of gravity. Based on this theory, it is possible for human kind to manipulate physical space-time on earth, and produce a machine which can physically prolong human's lifetime.

  9. Hyperbolic statics in space-time

    E-Print Network [OSTI]

    Dmitry Pavlov; Sergey Kokarev

    2014-12-11

    Based on the concept of material event as an elementary material source that is concentrated on metric sphere of zero radius --- light-cone of Minkowski space-time, we deduce the analog of Coulomb's law for hyperbolic space-time field universally acting between the events of space-time. Collective field that enables interaction of world lines of a pair of particles at rest contains a standard 3-dimensional Coulomb's part and logarithmic addendum. We've found that the Coulomb's part depends on a fine balance between causal and geometric space-time characteristics (the two regularizations concordance).

  10. Software development with real-time collaborative editing

    E-Print Network [OSTI]

    Goldman, Max, Ph. D. Massachusetts Institute of Technology

    2012-01-01

    This thesis presents Collabode, a web-based integrated development environment for Java. With real-time collaborative editing, multiple programmers can use Collabode to edit the same source code at the same time. Collabode ...

  11. Digital time delay

    DOE Patents [OSTI]

    Martin, A.D.

    1986-05-09

    Method and apparatus are provided for generating an output pulse following a trigger pulse at a time delay interval preset with a resolution which is high relative to a low resolution available from supplied clock pulses. A first lumped constant delay provides a first output signal at predetermined interpolation intervals corresponding to the desired high resolution time interval. Latching circuits latch the high resolution data to form a first synchronizing data set. A selected time interval has been preset to internal counters and corrected for circuit propagation delay times having the same order of magnitude as the desired high resolution. Internal system clock pulses count down the counters to generate an internal pulse delayed by an internal which is functionally related to the preset time interval. A second LCD corrects the internal signal with the high resolution time delay. A second internal pulse is then applied to a third LCD to generate a second set of synchronizing data which is complementary with the first set of synchronizing data for presentation to logic circuits. The logic circuits further delay the internal output signal with the internal pulses. The final delayed output signal thereafter enables the output pulse generator to produce the desired output pulse at the preset time delay interval following input of the trigger pulse.

  12. Instrumenting Wireless Sensor Networks for Real-Time Surveillance

    E-Print Network [OSTI]

    Instrumenting Wireless Sensor Networks for Real-Time Surveillance Songhwai Oh, Phoebus Chen information is not available, the classification-based tracking algorithm behaves as the NNF. Considering

  13. Reminder Reserving and Scheduling Transmission over the Time...

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

    of Conduct Tariff TF Web Based Training Notice: Reminder - Reserving & Scheduling Transmission over the Time Change Posted Date: 342015 Effective March 8, 2015 at 0200 Pacific...

  14. Reserving and Scheduling Transmission over the Time Change -...

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

    Standards of Conduct Tariff TF Web Based Training Notice: Reserving & Scheduling Transmission over the Time Change Posted Date: 2232015 Effective March 8, 2015 at 0200 Pacific...

  15. Reserving and Scheduling Transmission over the Time Change -...

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

    Standards of Conduct Tariff TF Web Based Training Notice: Reserving & Scheduling Transmission over the Time Change Posted Date: 10172014 Effective November 2, 2014 at 0200...

  16. Reminder Reserving and Scheduling Transmission over the Time...

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

    of Conduct Tariff TF Web Based Training Notice: Reminder - Reserving & Scheduling Transmission over the Time Change Posted Date: 10292014 Effective November 2, 2014 at 0200...

  17. Abstract: During a flare, the increase in solar flux at X-ray and EUV wavelengths causes an enhancement in electron densities in planetary ionospheres. Although it is known that relative changes in electron density during a flare are greater for lower alt

    E-Print Network [OSTI]

    Withers, Paul

    Abstract: During a flare, the increase in solar flux at X-ray and EUV wavelengths causes in electron density during a solar flare, based on analysis of 12 Mars Global Surveyor (MGS) radio occultation electron density profiles which have been affected by solar flares. We find that solar zenith angle also

  18. Development of Methods for Reducing the Cost of Density Functional Theory and Time-Dependent Density Functional Theory

    E-Print Network [OSTI]

    Hernandez, Samuel

    2015-01-01

    based Solar Cells: Time-Resolved Microwave Conductivity andbased Solar Cells: Time-Resolved Microwave Conductivity andbased Solar Cells: Time-Resolved Microwave Conductivity and

  19. Kairoscope : coordinating time socially

    E-Print Network [OSTI]

    Martin, Reed Eric

    2010-01-01

    If everyone says time is relative, why is it still so rigidly defined? There have been many attempts to address the issue of coordinating schedules, but each of these attempts runs into an issue of rigidity: in order to ...

  20. The Williston time capsule

    E-Print Network [OSTI]

    Moses, David (David Patrick)

    2015-01-01

    This project is a time capsule of the oil economy, created by entombing everyday objects made from and powered by petroleum into a landscape that spatially recreates the processes of drilling and fracking a contemporary ...

  1. Sublinear Time Algorithms

    E-Print Network [OSTI]

    Rubinfeld, Ronitt

    Sublinear time algorithms represent a new paradigm in computing, where an algorithm must give some sort of an answer after inspecting only a very small portion of the input. We discuss the types of answers that one can ...

  2. Time, energy & form

    E-Print Network [OSTI]

    McInnis, Martha Jane

    1982-01-01

    Physical manifestations of time occur in natural forms of all sizes. Architectural form serves as shelter while providing a built envelope of human life, simultaneously influencing and influenced by energetic activities ...

  3. Time in quantum mechanics 

    E-Print Network [OSTI]

    Chapin, Kimberly R.

    1997-01-01

    TIME IN QUANTUM MECHANICS A Thesis by KIMBERLY R. CHAPIN Submitted to Texas A8M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style and content by: Marian O. Scully (Chair... of Committee) Edward S. Fry (Member) aan Laane (Member) Thomas W. Adair, III (Head of Department) August 1997 Major Subject: Physics TIME IN QIJANTUM MECHANICS A Thesis by KIMBERLY R. CHAPIN Submitted to the Oflice of Graduate Studies of Texas A...

  4. Real time analysis under EDS

    SciTech Connect (OSTI)

    Schneberk, D.

    1985-07-01

    This paper describes the analysis component of the Enrichment Diagnostic System (EDS) developed for the Atomic Vapor Laser Isotope Separation Program (AVLIS) at Lawrence Livermore National Laboratory (LLNL). Four different types of analysis are performed on data acquired through EDS: (1) absorption spectroscopy on laser-generated spectral lines, (2) mass spectrometer analysis, (3) general purpose waveform analysis, and (4) separation performance calculations. The information produced from this data includes: measures of particle density and velocity, partial pressures of residual gases, and overall measures of isotope enrichment. The analysis component supports a variety of real-time modeling tasks, a means for broadcasting data to other nodes, and a great degree of flexibility for tailoring computations to the exact needs of the process. A particular data base structure and program flow is common to all types of analysis. Key elements of the analysis component are: (1) a fast access data base which can configure all types of analysis, (2) a selected set of analysis routines, (3) a general purpose data manipulation and graphics package for the results of real time analysis. Each of these components are described with an emphasis upon how each contributes to overall system capability. 3 figs.

  5. The thermodynamics of time

    E-Print Network [OSTI]

    Dries Sels; Michiel Wouters

    2015-01-22

    The problem of time is a deep paradox in our physical description of the world. According to Aristotle's relational theory, time is a measure of change and does not exist on its own. In contrast, quantum mechanics, just like Newtonian mechanics, is equipped with a master clock that dictates the evolution of a system. This clock is infinitely precise and tacitly supplied free of charge from outside physics. Not only does this absolute time make it notoriously difficult to make a consistent theory of quantum gravity, it is also the underlying problem in establishing the second law. Indeed, contrary to our experience, the Wheeler-deWitt equation --a canonical quantization of general relativity-- predicts a static universe. Similarly, when simply concerned with the dynamics of a closed quantum system, there is no second law because the Von Neumann entropy is invariant under unitary transformations. Here we are mainly concerned with the latter problem and we show that it can be resolved by attributing a minimal amount of resources to the measurement of time. Although there is an absolute time in quantum mechanics, an observer can only establish a time by measuring a clock. For a local measurement, the minimal entropy production is equal to the number of ticks. This lower bound is attained by a black hole.

  6. Nordic Journal of Computing 10(2003), 135. TIMED CSP = CLOSED TIMED -AUTOMATA

    E-Print Network [OSTI]

    Ouaknine, Joël

    2003-01-01

    ) which may then be verified using the model checker FDR. We characterize the expressive power to ver- ify specifications on certain dense-time systems using the model checker FDR2 [23, 24-based approach for Timed CSP is that verification can be carried out on the model checker FDR, as dis- cussed

  7. Nordic Journal of Computing 10(2003), 1--35. TIMED CSP = CLOSED TIMED #AUTOMATA

    E-Print Network [OSTI]

    Ouaknine, Joël

    2003-01-01

    ) which may then be verified using the model checker FDR. We characterize the expressive power to ver­ ify specifications on certain dense­time systems using the model checker FDR 2 [23, 24­based approach for Timed CSP is that verification can be carried out on the model checker FDR, as dis­ cussed

  8. Managing Contention and Timing Constraints in a RealTime Database System \\Lambda

    E-Print Network [OSTI]

    Son, Sang H.

    22903, USA Abstract Previous work in real­time database management systems (RT­DBMS) has primarily based an actual RT­ DBMS on a real­time microkernel operating system. A real RT­DBMS must confront many practical of con­ structing a RT­DBMS is divided into three basic prob­ lems: dealing with resource contention

  9. A Real-time Framework for Model Predictive Control of Continuous-Time Nonlinear Systems

    E-Print Network [OSTI]

    Sontag, Eduardo

    for piecewise constant NMPC of continuous-time processes. Index Terms-- nonlinear model predictive control, real-time optimization, optimal control, piecewise constant control I. INTRODUCTION Model predictive control (MPC horizon, open-loop optimal control problem. The unprecedented industrial success of MPC ap- proaches based

  10. Timing control by redundant inhibitory neuronal circuits

    SciTech Connect (OSTI)

    Tristan, I. Rulkov, N. F.; Huerta, R.; Rabinovich, M.

    2014-03-15

    Rhythms and timing control of sequential activity in the brain is fundamental to cognition and behavior. Although experimental and theoretical studies support the understanding that neuronal circuits are intrinsically capable of generating different time intervals, the dynamical origin of the phenomenon of functionally dependent timing control is still unclear. Here, we consider a new mechanism that is related to the multi-neuronal cooperative dynamics in inhibitory brain motifs consisting of a few clusters. It is shown that redundancy and diversity of neurons within each cluster enhances the sensitivity of the timing control with the level of neuronal excitation of the whole network. The generality of the mechanism is shown to work on two different neuronal models: a conductance-based model and a map-based model.

  11. Quantum time evolution in time-dependent fields and time-independent reactive-scattering calculations via an efficient Fourier grid preconditioner

    E-Print Network [OSTI]

    Miller, William H.

    for representative models of bound and dissociative systems driven by time-dependent pulsed fields, and for time. When the molecular system is driven by an external time-dependent field e.g., a laser field the system recent Krylov subspace-based iterative methods that are accelerated by a Fourier grid preconditioner

  12. Discussion Note Architecture-based motivation vs Reward-based

    E-Print Network [OSTI]

    Sloman, Aaron

    Discussion Note Architecture-based motivation vs Reward-based motivation Aaron Sloman School to change.) CONTENTS (Provisional) Introduction Where do motives come from? My claim Learning and motivation Architecture-based motivation More complex variations Mechanisms required Conclusion Acknowledgements From time

  13. Time and Labor 9.1 Time Keeper Payroll -HCSD

    E-Print Network [OSTI]

    Time and Labor 9.1 Time Keeper Payroll - HCSD Version Date: July 2012 #12;COPYRIGHT & TRADEMARKS create a risk of personal injury. If you use this software in dangerous applications, then you shall Guide Time and Labor 9.1 Time Keeper Payroll - HCSD Page iii Table of Contents Time and Labor 9.1 Time

  14. Timed Alternating-Time Temporal Logic Thomas A. Henzinger1

    E-Print Network [OSTI]

    Henzinger, Thomas A.

    equally powerful options for updating the state of the game, advancing time, or blocking time. Second, we in order to specify real-time objectives for games played on timed structures. We define the semantics Timed games are a formal model for the synthesis of real-time systems [22, 20]. While much research

  15. Time-Resolved

    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 ofDidDevelopment TopMetathesisSediments andTheTime-Resolved Time-Resolved

  16. A time-based interpretation of Rassouli's Fusionart 

    E-Print Network [OSTI]

    Sharma, Charu

    2004-01-01

    Throughout the history of film and animation two-dimensional paintings have been used as inspiration for films and other animated works of art. The goal of this thesis is to use the visual imagery of artist Freydoon Rassouli's (1943- ) paintings...

  17. Utilization of Time-Based Techniques in Research and Teaching

    E-Print Network [OSTI]

    Sanguinetti, Paola

    2009-07-29

    This article describes how computer animations, combined with cinematic techniques, have served as a teaching and research tool in architecture. Animations were used in the following areas: case studies of precedents in architecture using...

  18. Real Time Computational Algorithms for Eddy Current Based Damage Detection

    E-Print Network [OSTI]

    and improved techniques are constantly being sought to facilitate the detection of hidden corrosion and aws in structures such as airplanes and pipelines. In this paper, we explore the feasibility of detecting technology are components of airplanes, motor vehicles, pipelines, bridges, trains, and power stations

  19. Tips: Time-Based Electricity Rates | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMayBuildingTheEasements30, 2008: US portionHeat

  20. Tips: Time-Based Electricity Rates | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report1538-1950 Timeline of Events:Smart Meters and a Smarter

  1. Time Activity Time Activity Time Activity Tuesday CLOSED CONFERENCE CLOSED CONFERENCE CLOSED CONFERENCE

    E-Print Network [OSTI]

    Burg, Theresa

    Time Activity Time Activity Time Activity Tuesday CLOSED CONFERENCE CLOSED CONFERENCE CLOSED CONFERENCE 2-Jun-15 Wednesday CLOSED CONFERENCE CLOSED CONFERENCE CLOSED CONFERENCE 3-Jun-15 Thursday CLOSED

  2. Time in Cosmology

    E-Print Network [OSTI]

    R. Brout; R. Parentani

    1999-02-05

    The notion of time in cosmology is revealed through an examination of transition matrix elements of radiative processes occurring in the cosmos. To begin with, the very concept of time is delineated in classical physics in terms of correlations between the succession of configurations which describe a process and a standard trajectory called the clock. The total is an isolated system of fixed energy. This is relevant for cosmology in that the universe is an isolated system which we take to be homogeneous and isotropic. Furthermore, in virtue of the constraint which arises from reparametrization invariance of time, it has total energy zero. Therefore the momentum of the scale factor is determined from the energy of matter. In the quantum theory this is exploited through use of the WKB approximation for the wave function of the scale factor, justified for a large universe. The formalism then gives rise to matrix elements describing matter processes. These are shown to take on the form of usual time dependent quantum amplitudes wherein the temporal dependence is given by a background which is once more fixed by the total energy of matter.

  3. Time and Attendance Reporting

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

    2004-10-22

    DOE O 535.1 establishes the Department's requirements and responsibilities governing time and attendance reporting. The purpose of this revision is to reflect the transition of payroll processing from the Capital Accounting Center to the Defense Finance and Accounting System. Cancels DOE O 3600.1B. Canceled by DOE O 322.1C.

  4. Presenter:! Time & Date: !

    E-Print Network [OSTI]

    Collar, Juan I.

    a checkbook, you can understand which energy options have the promise of supporting humankind - wind, hydro://cfcpwork.uchicago.edu/mailman/listinfo/cafe! A Reality Check on Alternative Energy! #12;A Reality Check on Alternative Energy! Presenter: Liz Moyer! Time a bigger, richer population without fossil fuels (which will definitely run out someday)? Energy is a hot

  5. Time-Encoded Imagers.

    SciTech Connect (OSTI)

    Marleau, Peter; Brubaker, Erik

    2014-11-01

    This report provides a short overview of the DNN R&D funded project, Time-Encoded Imagers. The project began in FY11 and concluded in FY14. The Project Description below provides the overall motivation and objectives for the project as well as a summary of programmatic direction. It is followed by a short description of each task and the resulting deliverables.

  6. Time reversal communication system

    DOE Patents [OSTI]

    Candy, James V. (Danville, CA); Meyer, Alan W. (Danville, CA)

    2008-12-02

    A system of transmitting a signal through a channel medium comprises digitizing the signal, time-reversing the digitized signal, and transmitting the signal through the channel medium. The channel medium may be air, earth, water, tissue, metal, and/or non-metal.

  7. Time-bin entangled photon holes

    E-Print Network [OSTI]

    J. Liang; J. D. Franson; T. B. Pittman

    2012-08-23

    The general concept of entangled photon holes is based on a correlated absence of photon pairs in an otherwise constant optical background. Here we consider the specialized case when this background is confined to two well-defined time bins, which allows the formation of time-bin entangled photon holes. We show that when the typical coherent state background is replaced by a true single-photon (Fock state) background, the basic time-bin entangled photon-hole state becomes equivalent to one of the time-bin entangled photon-pair states. We experimentally demonstrate these ideas using a parametric down-conversion photon-pair source, linear optics, and post-selection to violate a Bell inequality with time-bin entangled photon holes.

  8. System and method for time synchronization in a wireless network

    DOE Patents [OSTI]

    Gonia, Patrick S. (Maplewood, MN); Kolavennu, Soumitri N. (Blaine, MN); Mahasenan, Arun V. (Kerala, IN); Budampati, Ramakrishna S. (Maple Grove, MN)

    2010-03-30

    A system includes multiple wireless nodes forming a cluster in a wireless network, where each wireless node is configured to communicate and exchange data wirelessly based on a clock. One of the wireless nodes is configured to operate as a cluster master. Each of the other wireless nodes is configured to (i) receive time synchronization information from a parent node, (ii) adjust its clock based on the received time synchronization information, and (iii) broadcast time synchronization information based on the time synchronization information received by that wireless node. The time synchronization information received by each of the other wireless nodes is based on time synchronization information provided by the cluster master so that the other wireless nodes substantially synchronize their clocks with the clock of the cluster master.

  9. REAL TIME SYSTEM OPERATIONS 2006-2007

    SciTech Connect (OSTI)

    Eto, Joseph H.; Parashar, Manu; Lewis, Nancy Jo

    2008-08-15

    The Real Time System Operations (RTSO) 2006-2007 project focused on two parallel technical tasks: (1) Real-Time Applications of Phasors for Monitoring, Alarming and Control; and (2) Real-Time Voltage Security Assessment (RTVSA) Prototype Tool. The overall goal of the phasor applications project was to accelerate adoption and foster greater use of new, more accurate, time-synchronized phasor measurements by conducting research and prototyping applications on California ISO's phasor platform - Real-Time Dynamics Monitoring System (RTDMS) -- that provide previously unavailable information on the dynamic stability of the grid. Feasibility assessment studies were conducted on potential application of this technology for small-signal stability monitoring, validating/improving existing stability nomograms, conducting frequency response analysis, and obtaining real-time sensitivity information on key metrics to assess grid stress. Based on study findings, prototype applications for real-time visualization and alarming, small-signal stability monitoring, measurement based sensitivity analysis and frequency response assessment were developed, factory- and field-tested at the California ISO and at BPA. The goal of the RTVSA project was to provide California ISO with a prototype voltage security assessment tool that runs in real time within California ISO?s new reliability and congestion management system. CERTS conducted a technical assessment of appropriate algorithms, developed a prototype incorporating state-of-art algorithms (such as the continuation power flow, direct method, boundary orbiting method, and hyperplanes) into a framework most suitable for an operations environment. Based on study findings, a functional specification was prepared, which the California ISO has since used to procure a production-quality tool that is now a part of a suite of advanced computational tools that is used by California ISO for reliability and congestion management.

  10. Time Synchronization in Hierarchical TESLA Wireless Sensor Networks

    SciTech Connect (OSTI)

    Jason L. Wright; Milos Manic

    2009-08-01

    Time synchronization and event time correlation are important in wireless sensor networks. In particular, time is used to create a sequence events or time line to answer questions of cause and effect. Time is also used as a basis for determining the freshness of received packets and the validity of cryptographic certificates. This paper presents secure method of time synchronization and event time correlation for TESLA-based hierarchical wireless sensor networks. The method demonstrates that events in a TESLA network can be accurately timestamped by adding only a few pieces of data to the existing protocol.

  11. Tevatron injection timing

    SciTech Connect (OSTI)

    Saritepe, S.; Annala, G.

    1993-06-01

    Bunched beam transfer from one accelerator to another requires coordination and synchronization of many ramped devices. During collider operation timing issues are more complicated since one has to switch from proton injection devices to antiproton injection devices. Proton and antiproton transfers are clearly distinct sequences since protons and antiprotons circulate in opposite directions in the Main Ring (MR) and in the Tevatron. The time bumps are different, the kicker firing delays are different, the kickers and lambertson magnets are different, etc. Antiprotons are too precious to be used for tuning purposes, therefore protons are transferred from the Tevatron back into the Main Ring, tracing the path of antiprotons backwards. This tuning operation is called ``reverse injection.`` Previously, the reverse injection was handled in one supercycle. One batch of uncoalesced bunches was injected into the Tevatron and ejected after 40 seconds. Then the orbit closure was performed in the MR. In the new scheme the lambertson magnets have to be moved and separator polarities have to be switched, activities that cannot be completed in one supercycle. Therefore, the reverse injection sequence was changed. This involved the redefinition of TVBS clock event $D8 as MRBS $D8 thus making it possible to inject 6 proton batches (or coalesced bunches) and eject them one at a time on command, performing orbit closure each time in the MR. Injection devices are clock event driven. The TCLK is used as the reference clock. Certain TCLK events are triggered by the MR beam synchronized clock (MRBS) events. Some delays are measured in terms of MRBS ticks and MR revolutions. See Appendix A for a brief description of the beam synchronized clocks.

  12. Segmenting Time Series for Weather Forecasting

    E-Print Network [OSTI]

    Reiter, Ehud

    summarisation. We found three alternative ways in which we could model data summarisation. One approach is based turbines. In the domain of meteorology, time series data produced by numerical weather prediction (NWP) models is summarised as weather forecast texts. In the domain of gas turbines, sensor data from

  13. Performance Prediction through Time Measurements Roman Iakymchuk

    E-Print Network [OSTI]

    of predicting performance of linear algebra algorithms for small matrices. This approach is based on reducing linear algebra operations such as the BLAS subroutines. As the time measurements confirmed, the execution is built on top of two BLAS subroutines, with the separately measured one. The applicability

  14. Time Reversal Violation

    SciTech Connect (OSTI)

    Quinn, H; /SLAC

    2009-01-27

    This talk briefly reviews three types of time-asymmetry in physics, which I classify as universal, macroscopic and microscopic. Most of the talk is focused on the latter, namely the violation of T-reversal invariance in particle physics theories. In sum tests of microscopic T-invariance, or observations of its violation, are limited by the fact that, while we can measure many processes, only in very few cases can we construct a matched pair of process and inverse process and observe it with sufficient sensitivity to make a test. In both the cases discussed here we can achieve an observable T violation making use of flavor tagging, and in the second case also using the quantum properties of an antisymmetric coherent state of two B mesons to construct a CP-tag. Both these tagging properties depend only on very general properties of the flavor and/or CP quantum numbers and so provide model independent tests for T-invariance violations. The microscopic laws of physics are very close to T-symmetric. There are small effects that give CP- and T-violating processes in three-generation-probing weak decays. Where a T-violating observable can be constructed we see the relationships between T-violation and CP-violation expected in a CPT conserving theory. These microscopic effects are unrelated to the 'arrow of time' that is defined by increasing entropy, or in the time direction defined by the expansion of our Universe.

  15. NewsBank InfoWeb Los Angeles Times

    E-Print Network [OSTI]

    Redmiles, David F.

    unspecified punitive damages. New York-based JetBlue has apologized for providing the data without customerNewsBank InfoWeb Los Angeles Times Los Angeles Times September 23, 2003 California JetBlue Is Sued Over Release of Data on Its Passengers to U.S.Contractor Author: David Rosenzweig; Times Staff Writer

  16. Univariate Modeling and Forecasting of Monthly Energy Demand Time Series

    E-Print Network [OSTI]

    Abdel-Aal, Radwan E.

    Univariate Modeling and Forecasting of Monthly Energy Demand Time Series Using Abductive and Neural networks, Neural networks, Modeling, Forecasting, Energy demand, Time series forecasting, Power system demand time series based only on data for six years to forecast the demand for the seventh year. Both

  17. Model checking Timed CSP Philip Armstrong Gavin Lowe Joel Ouaknine

    E-Print Network [OSTI]

    Ouaknine, Joël

    Model checking Timed CSP Philip Armstrong Gavin Lowe Jo¨el Ouaknine A.W. Roscoe Oxford University Department of Computer Science Abstract Though Timed CSP was developed 25 years ago and the CSP for Timed CSP. In this paper we report on the creation of such a version, based on the digitisation results

  18. System Reliability for LED-Based Products

    SciTech Connect (OSTI)

    Davis, J Lynn; Mills, Karmann; Lamvik, Michael; Yaga, Robert; Shepherd, Sarah D; Bittle, James; Baldasaro, Nick; Solano, Eric; Bobashev, Georgiy; Johnson, Cortina; Evans, Amy

    2014-04-07

    Results from accelerated life tests (ALT) on mass-produced commercially available 6” downlights are reported along with results from commercial LEDs. The luminaires capture many of the design features found in modern luminaires. In general, a systems perspective is required to understand the reliability of these devices since LED failure is rare. In contrast, components such as drivers, lenses, and reflector are more likely to impact luminaire reliability than LEDs.

  19. In Some Curved Spaces, One Can Solve NPHard Problems in Polynomial Time

    E-Print Network [OSTI]

    Kreinovich, Vladik

    ]. Some of the technical and physics ideas on which he worked at that time (based on super­conductivity

  20. Embedded and Real-time Systems Classes in Traditional and Distance Education Format

    E-Print Network [OSTI]

    Thornton, Mitchell

    . In particular, we describe embedded and real-time systems classes that are based upon the ARM® and Arduino

  1. EPICS BASE

    Energy Science and Technology Software Center (OSTI)

    002230MLTPL00 Experimental Physics and Industrial Control System BASE  http://www.aps.anl.gov/epics 

  2. Space-time diamonds

    E-Print Network [OSTI]

    Daiqin Su; T. C. Ralph

    2015-07-02

    We show that the particle number distribution of diamond modes, modes that are localised in a finite space-time region, are thermal for the Minkowski vacuum state of a massless scalar field, an analogue to the Unruh effect. The temperature of the diamond is inversely proportional to its size. An inertial observer can detect this thermal radiation by coupling to the diamond modes using an appropriate energy scaled detector. We further investigate the correlations between various diamonds and find that entanglement between adjacent diamonds dominates.

  3. Advertising Emergency Department Wait Times

    E-Print Network [OSTI]

    Weiner, Scott G

    2013-01-01

    studies evaluating the advertising of ED wait times. Only 1potentially used for advertising may be inaccurate. AccessedE ditorial Advertising Emergency Department Wait Times Scott

  4. Final Exam Location and Time

    E-Print Network [OSTI]

    Final Exam Location and Time. Math 162 Fall 2001. Date: Wednesday December 12, 2001. Time: 7:00 pm -9:00 pm. Location: Lambert Fieldhouse ...

  5. Final Exam Location and Time

    E-Print Network [OSTI]

    Final Exam Location and Time. Math 161 Fall 2001. Date: Friday December 14, 2001. Time: 8:00 am -10:00 am. Location: Lambert Fieldhouse ...

  6. 1. 2 , 4 2 ( Times

    E-Print Network [OSTI]

    Kaplan, Alexander

    format with double line spacing (font Times New Roman, 12 pt; margins: left and up -- 30 mm, right , . 20. , , . 1. 2 , 4 2 ( Times New Roman, 12 pt

  7. Denoising Deterministic Time Series

    E-Print Network [OSTI]

    Steven P. Lalley; Andrew B. Nobel

    2006-04-21

    This paper is concerned with the problem of recovering a finite, deterministic time series from observations that are corrupted by additive, independent noise. A distinctive feature of this problem is that the available data exhibit long-range dependence and, as a consequence, existing statistical theory and methods are not readily applicable. This paper gives an analysis of the denoising problem that extends recent work of Lalley, but begins from first principles. Both positive and negative results are established. The positive results show that denoising is possible under somewhat restrictive conditions on the additive noise. The negative results show that, under more general conditions on the noise, no procedure can recover the underlying deterministic series.

  8. Real time automated inspection

    DOE Patents [OSTI]

    Fant, K.M.; Fundakowski, R.A.; Levitt, T.S.; Overland, J.E.; Suresh, B.R.; Ulrich, F.W.

    1985-05-21

    A method and apparatus are described relating to the real time automatic detection and classification of characteristic type surface imperfections occurring on the surfaces of material of interest such as moving hot metal slabs produced by a continuous steel caster. A data camera transversely scans continuous lines of such a surface to sense light intensities of scanned pixels and generates corresponding voltage values. The voltage values are converted to corresponding digital values to form a digital image of the surface which is subsequently processed to form an edge-enhanced image having scan lines characterized by intervals corresponding to the edges of the image. The edge-enhanced image is thresholded to segment out the edges and objects formed by the edges by interval matching and bin tracking. Features of the objects are derived and such features are utilized to classify the objects into characteristic type surface imperfections. 43 figs.

  9. Time encoded radiation imaging

    DOE Patents [OSTI]

    Marleau, Peter; Brubaker, Erik; Kiff, Scott

    2014-10-21

    The various technologies presented herein relate to detecting nuclear material at a large stand-off distance. An imaging system is presented which can detect nuclear material by utilizing time encoded imaging relating to maximum and minimum radiation particle counts rates. The imaging system is integrated with a data acquisition system that can utilize variations in photon pulse shape to discriminate between neutron and gamma-ray interactions. Modulation in the detected neutron count rates as a function of the angular orientation of the detector due to attenuation of neighboring detectors is utilized to reconstruct the neutron source distribution over 360 degrees around the imaging system. Neutrons (e.g., fast neutrons) and/or gamma-rays are incident upon scintillation material in the imager, the photons generated by the scintillation material are converted to electrical energy from which the respective neutrons/gamma rays can be determined and, accordingly, a direction to, and the location of, a radiation source identified.

  10. Insights from Smart Meters: The Potential for Peak-Hour Savings from Behavior-Based Programs

    E-Print Network [OSTI]

    Todd, Annika

    2014-01-01

    EE) and/or demand response (DR) program implementers toincentive-based demand response (DR) programs and time-based

  11. Performance-Based Rough Terrain Navigation for Nonholonomic Mobile Robots

    E-Print Network [OSTI]

    Parker, Lynne E.

    , performance issues (e.g., robot safety, or geometric, time-based, and physics- based criteria) are adequately, such as robot safety, or geometric, time-based, and physics-based criteria. However, where uncertainties exist that by incorporating criterion-optimizing design in each module and organizing them in a behavior-based architecture

  12. Periodic Reward-Based Scheduling and Its

    E-Print Network [OSTI]

    Aydin, Hakan

    catastrophic. Examples of real-time systems can be found in control systems of nuclear power plants, air36 Periodic Reward-Based Scheduling and Its Application to Power-Aware Real-Time Systems Hakan ........................... 36-9 Modeling Real-Time Workload and Energy on a Variable Speed CPU · Correlating Real-Time Power

  13. Dead-time Corrected Disdrometer Data

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Bartholomew, Mary Jane

    Original and dead-time corrected disdrometer results for observations made at SGP and TWP. The correction is based on the technique discussed in Sheppard and Joe, 1994. In addition, these files contain calculated radar reflectivity factor, mean Doppler velocity and attenuation for every measurement for both the original and dead-time corrected data at the following wavelengths: 0.316, 0.856, 3.2, 5, and 10cm (W,K,X,C,S bands). Pavlos Kollias provided the code to do these calculations.

  14. Dead-time Corrected Disdrometer Data

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Bartholomew, Mary Jane

    2008-03-05

    Original and dead-time corrected disdrometer results for observations made at SGP and TWP. The correction is based on the technique discussed in Sheppard and Joe, 1994. In addition, these files contain calculated radar reflectivity factor, mean Doppler velocity and attenuation for every measurement for both the original and dead-time corrected data at the following wavelengths: 0.316, 0.856, 3.2, 5, and 10cm (W,K,X,C,S bands). Pavlos Kollias provided the code to do these calculations.

  15. Time's Ontic Voltage Craig Callender

    E-Print Network [OSTI]

    Callender, Craig

    Time's Ontic Voltage Craig Callender Philosophy of time, as practiced throughout the last hundred venue for attacking questions about the nature of time--in sharp contrast to the primary venue slowly in philosophy of time.1 Since twentieth-century analytic philosophy as a whole often drew

  16. Untameable Timed Automata! (Extended Abstract)

    E-Print Network [OSTI]

    Doyen, Laurent

    are a widely studied model for real­time systems. Since 8 years, several tools implement this model­life systems. 1 Introduction Real­Time Systems ­ Since their introduction by Alur and Dill in [AD94], timed au­ tomata are one of the most studied models for real­time systems. Numerous works have been devoted

  17. Untameable Timed Automata! (Extended Abstract)

    E-Print Network [OSTI]

    Doyen, Laurent

    model for real-time systems. Since 8 years, several tools implement this model and are successfully used for a restricted class of timed automata, which has been sufficient for modeling numerous real-life systems. 1 Introduction Real-Time Systems - Since their introduction by Alur and Dill in [AD94], timed au- tomata are one

  18. Rotational relaxation time as unifying time scale for polymer and fiber drag reduction

    E-Print Network [OSTI]

    Boelens, A M P

    2015-01-01

    Using hybrid Direct Numerical Simulation with Langevin dynamics, a comparison is performed between polymer and fiber stress tensors in turbulent flow. The stress tensors are found to be similar, suggesting a common drag reducing mechanism in the onset regime for both flexible polymers and rigid fibers. Since fibers do not have an elastic backbone this must be a viscous effect. Analysis of the viscosity tensor reveals that all terms are negligible, except the off-diagonal shear viscosity associated with rotation. Based on this analysis, we identify the rotational orientation time as the unifying time scale setting a new time criterion for drag reduction by both flexible polymers and rigid fibers.

  19. Provably secure time distribution for the electric grid

    SciTech Connect (OSTI)

    Smith IV, Amos M; Evans, Philip G; Williams, Brian P; Grice, Warren P

    2015-01-01

    We demonstrate a quantum time distribution (QTD) method that combines the precision of optical timing techniques with the integrity of quantum key distribution (QKD). Critical infrastructure is dependent on microprocessor- and programmable logic-based monitoring and control systems. The distribution of timing information across the electric grid is accomplished by GPS signals which are known to be vulnerable to spoofing. We demonstrate a method for synchronizing remote clocks based on the arrival time of photons in a modifed QKD system. This has the advantage that the signal can be veried by examining the quantum states of the photons similar to QKD.

  20. Dead-time optimized time-correlated photon counting instrument with synchronized, independent timing channels

    E-Print Network [OSTI]

    Enderlein, Jörg

    Dead-time optimized time-correlated photon counting instrument with synchronized, independent timing channels Michael Wahla and Hans-Jürgen Rahn PicoQuant GmbH, Rudower Chaussee 29, D-12489 Berlin December 2006; accepted 19 February 2007; published online 23 March 2007 Time-correlated single photon

  1. Time and Labor 9.1 Time Keeper -HCSD

    E-Print Network [OSTI]

    Time and Labor 9.1 Time Keeper - HCSD Version Date: July 2012 #12;COPYRIGHT & TRADEMARKS Copyright create a risk of personal injury. If you use this software in dangerous applications, then you shall

  2. Discussion Note Architecture-based motivation vs Reward-based motivation

    E-Print Network [OSTI]

    Sloman, Aaron

    Discussion Note Architecture-based motivation vs Reward-based motivation Aaron Sloman School A-B-M Introduction Where do motives come from? My claim Learning and motivation Architecture-based motivation More complex variations Mechanisms required Conclusion Acknowledgements From time to time I shall

  3. Reliable Downlink Scheduling for Wireless Networks with Real-Time and Non-Real Time Clients 

    E-Print Network [OSTI]

    Jain, Abhishek

    2014-08-05

    In this thesis, we studied the problem of designing a down link scheduling policy to serve multiple types of clients from a base station in a time-varying wireless network. An ideal scheduling policy is fair among the clients, provides reliability...

  4. "control-Alt-Delete": Rebooting Solutions for the E-Waste Problem

    E-Print Network [OSTI]

    Li, J; Zeng, X; Chen, M; Ogunseitan, OA; Stevels, A

    2015-01-01

    i?cation of e-waste in green design and green disposal couldN. ; Stevels, A. Design for green electronics, a greatof green chemistry: Efficiency in reaction design. Chem.

  5. "control-Alt-Delete": Rebooting Solutions for the E-Waste Problem

    E-Print Network [OSTI]

    Li, J; Zeng, X; Chen, M; Ogunseitan, OA; Stevels, A

    2015-01-01

    Recycling of Spent Lithium-Ion Battery: A Critical Review.lithium from spent lithium-ion battery using oxalic acid. J.

  6. "control-Alt-Delete": Rebooting Solutions for the E-Waste Problem

    E-Print Network [OSTI]

    Li, J; Zeng, X; Chen, M; Ogunseitan, OA; Stevels, A

    2015-01-01

    H. ; Liu, L. A novel dismantling process of waste printedG. Influence of e-waste dismantling and its regulations:Developing local dismantling and global infrastructure

  7. Universitat Bonn Wolfgang Alt, Martin Rost Abteilung Theoretische Biologie Sommersemester 2003

    E-Print Network [OSTI]

    Versuchsfeld sei in AnzPar (z.B. 20) gleichgroße Parzellen (`Klassen') aufgeteilt. Es soll die Verteilung der N werden. (a) Berechnet die x-Positionen der Parzellenmitten MittePar (mit Hilfe der Z¨ahlliste Par = 1:Anz

  8. "control-Alt-Delete": Rebooting Solutions for the E-Waste Problem

    E-Print Network [OSTI]

    Li, J; Zeng, X; Chen, M; Ogunseitan, OA; Stevels, A

    2015-01-01

    development of coherent and sustainable management practices that minimize adverse environmental impacts.

  9. "control-Alt-Delete": Rebooting Solutions for the E-Waste Problem

    E-Print Network [OSTI]

    Li, J; Zeng, X; Chen, M; Ogunseitan, OA; Stevels, A

    2015-01-01

    metals from spent lithium-ion batteries. Waste Manage. 2012,of metals in spent lithium-ion batteries. Chemosphere (70)spent high-power lithium-ion batteries. J. Hazard. Mater.

  10. IL-3 and Oncogenic Abl Regulate the Myeloblast Transcriptome by Alt= Stability

    E-Print Network [OSTI]

    Ernst, Jason

    The growth factor interleukin-3 (IL-3) promotes the survival and growth of multipotent hematopoietic progenitors and

  11. Renewable and alteRnative eneRgy Fact Sheet Using Biodiesel Fuel in Your Engine

    E-Print Network [OSTI]

    Boyer, Elizabeth W.

    speaking, this usually means combining vegetable oil with methanol in the presence of a cata- lyst (usually in much less air pollution due to its higher oxygen content and lack of both "aromatic compounds

  12. "control-Alt-Delete": Rebooting Solutions for the E-Waste Problem

    E-Print Network [OSTI]

    Li, J; Zeng, X; Chen, M; Ogunseitan, OA; Stevels, A

    2015-01-01

    circuits-on-paper flexible electronics. Sci. Rep. 2013, 3, 1for flexible and stretchable bio- integrated electronics.

  13. "control-Alt-Delete": Rebooting Solutions for the E-Waste Problem

    E-Print Network [OSTI]

    Li, J; Zeng, X; Chen, M; Ogunseitan, OA; Stevels, A

    2015-01-01

    B. An overview of e-waste management in China. J. Mater.practices for E-waste Management in Developed Countries; .Zhang, P. Exploring e-waste management systems in the United

  14. "control-Alt-Delete": Rebooting Solutions for the E-Waste Problem

    E-Print Network [OSTI]

    Li, J; Zeng, X; Chen, M; Ogunseitan, OA; Stevels, A

    2015-01-01

    H. Barriers to promoting eco-industrial parks development inexperience with eco-industrial parks: A case study of theto the design of eco-industrial parks: A literature review.

  15. "control-Alt-Delete": Rebooting Solutions for the E-Waste Problem

    E-Print Network [OSTI]

    Li, J; Zeng, X; Chen, M; Ogunseitan, OA; Stevels, A

    2015-01-01

    waste. Clean: Soil, Air, Water 2008, 36 (1), 19?24. (83) Li,soldering. Clean: Soil, Air, Water 2008, 36 (2), 145?151. (and air conditioner. And in 2015, the additional nine types, including range hood, electric-water-

  16. Florian Alt Alireza Sahami Shirazi Albrecht Schmidt Monitoring Heartbeat per Day to Motivate Increasing

    E-Print Network [OSTI]

    inactivity is a health concern in the United States and nearly 70% of the population are getting physical activity, pedometer, step, heartbeat rate, health, ECG 1 Introduction Physical activity is one of physical activity. In section 3 the concept of monitoring the heartbeat rate as means for activity

  17. HealtHPolicyFactSHeet UCLA Center For HeALtH

    E-Print Network [OSTI]

    Leistikow, Bruce N.

    in the United States. Early detection and treatment reduce colorectal cancer deaths.1 Source: National Center.ucop.edu/cprc/cmhi.html Mexican Immigrants Lack Health Services in the United States Mexican immigrants use fewer key preventive among women in the United States.3 Mammography screening and follow-up treatment can reduce breast

  18. Microsoft Word - S12161_AltAnalysis 25AUG2014.docx

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbinsMonumentThird6010OfficeColorado, Site

  19. Structure of poly(styrene-b-ethylene-alt-propylene) diblock copolymer

    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 NaturalDukeWakefieldSulfateSciTechtail. (Conference)Feedback System inStatus of theSciTechin aCrystalsmicelles in binary

  20. Property:EIA/861/AltFuelVehicle | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to: navigation, search Property NameDefinitionActivityTransmission

  1. ALT AMONT BLU EBELL NATUR AL BU TT ES PLAT EAU CATHED RAL RED WASH

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming Dry NaturalPrices1 Table 1.10 CoolingNotes &* jRealglobalAa AA3BOE

  2. ALT AMONT BLU EBELL NATUR AL BU TT ES PLAT EAU CATHED RAL RED WASH

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming Dry NaturalPrices1 Table 1.10 CoolingNotes &* jRealglobalAa

  3. ALT AMONT BLU EBELL NATUR AL BU TT ES PLAT EAU CATHED RAL RED WASH

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming Dry NaturalPrices1 Table 1.10 CoolingNotes &* jRealglobalAaLiquids

  4. advanced_biofuels_pathways_webinar_alt_text.doc | Department of Energy

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

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

  5. Microsoft PowerPoint - 2011_1206_Engstrom_ProposedPlanAlts100-K.pptx

    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 wouldMass map shines light on darkMicroorganisms to Speed ProductionRyutaro Himeno11Sh t TPLAN

  6. Date of Injury Date Time In Time Out

    E-Print Network [OSTI]

    : NORMAL Work Schedule (ie: MF, 8am5pm)First Name Last Name # of hours missed from work #12;RISK MGTDate of Injury Date Time In Time Out Total time worked medical appt no work within restrictions Next Medical Appointment(s): Tuesday of each week. Risk Mgt email: workcomp@colostate.edu; fax

  7. Real-Time Communication and Coordination in Embedded Sensor Networks

    E-Print Network [OSTI]

    Lu, Chenyang

    sensors and actuators. Because of this interaction, we find that sensor networks are very data-centric. These networks are very data-centric, with data queries being issued from base stations and time-dependent sensor

  8. Integration by Parts and Time Reversal for Diffusion Processes

    E-Print Network [OSTI]

    Millet, A.; Nualart, David; Sanz, M.

    1989-01-05

    In this paper we obtain necessary and sufficient conditions for the reversibility of the diffusion property, assuming the existence of a density at every time t. The proofs are based on techniques of the stochastic calculus ...

  9. Holographic dual of a time machine

    E-Print Network [OSTI]

    Irina Arefeva; Andrey Bagrov; Petter Saterskog; Koenraad Schalm

    2015-08-18

    We apply the $AdS/CFT$ holography to the simplest possible eternal time machine solution in $AdS_3$ based on two conical defects moving around their center of mass along a circular orbit. Closed timelike curves in this space-time extend all the way to the boundary of $AdS_3$, violating causality of the boundary field theory. By use of the geodesic approximation we address the "grandfather paradox" in the dual $1+1$ dimensional field theory and calculate the two-point retarded Green function. It has a non-trivial analytical structure both at negative and positive times, providing us with an intuition on how an interacting quantum field could behave once causality is broken. In contrast with the previous considerations our calculations reveal the possibility of a consistent and controllable evolution of a quantum system without any need to impose additional consistency constraints.

  10. Measurable Maximal Energy and Minimal Time Interval

    E-Print Network [OSTI]

    Eiman Abou El Dahab; Abdel Nasser Tawfik

    2014-01-14

    The possibility of finding the measurable maximal energy and the minimal time interval is discussed in different quantum aspects. It is found that the linear generalized uncertainty principle (GUP) approach gives a non-physical result. Based on large scale Schwarzshild solution, the quadratic GUP approach is utilized. The calculations are performed at the shortest distance, at which the general relativity is assumed to be a good approximation for the quantum gravity and at larger distances, as well. It is found that both maximal energy and minimal time have the order of the Planck time. Then, the uncertainties in both quantities are accordingly bounded. Some physical insights are addressed. Also, the implications on the physics of early Universe and on quantized mass are outlined. The results are related to the existence of finite cosmological constant and minimum mass (mass quanta).

  11. Flash Memory Garbage Collection in Hard Real-Time Systems 

    E-Print Network [OSTI]

    Lai, Chien-An

    2012-10-19

    , B.S., National Taiwan University Chair of Advisory Committee: Dr. Riccardo Bettati Due to advances in capacity, speed, and economics, NAND-based ash memory technology is increasingly integrated into all types of computing systems, ranging from... enterprise servers to embedded devices. However, due to its unpredictable up- date behavior and time consuming garbage collection mechanism, NAND-based ash memory is di cult to integrate into hard-real-time embedded systems. In this thesis, I propose a...

  12. Robust GPS-Based Timing for PMUs Based on Multi-Receiver Position-Information-Aided

    E-Print Network [OSTI]

    Gao, Grace Xingxin

    system functions are regulated by the supervisory control and data acquisition (SCADA) system. However, the SCADA system is comprised of a network of unsynchronized periphery measurement devices which are only polled for measurements once every few seconds. The limitations of the SCADA system prevent more

  13. Z .Bioelectrochemistry and Bioenergetics 45 1998 316 Time course of transmembrane voltage induced by time-varying electric

    E-Print Network [OSTI]

    Ljubljana, University of

    Z .Bioelectrochemistry and Bioenergetics 45 1998 3­16 Time course of transmembrane voltage induced.rBioelectrochemistry and Bioenergetics 45 1998 3­164 Fig. 1. The model on which the calculations were based. The cell is a sphere

  14. OPTICAL TIMING RECEIVER FOR THE NASA SPACE-BORNE RANGING SYSTEM PART I: DUAL PEAK-SENSING TIMING DISCRIMINATOR

    E-Print Network [OSTI]

    Leskovar, Branko

    2011-01-01

    1975. M. W. Fitzmaurice, NASA Ground-Based and Space-Rased Laser Ranging Systems NASA Technical Paper 1149,Timing Receiver for the NASA Laser Ranging System, Part 1:

  15. Real-Time Android RealTime DSP AB is a consultant firm, supplying expertise within the areas embedded systems and

    E-Print Network [OSTI]

    Svenningsson, Josef

    Real-Time Android RealTime DSP AB is a consultant firm, supplying expertise within the areas The Android platform is widely used for smartphones running all sorts of applications. Though most-time demands. Since Android is based on a Linux kernel, which is not made for real-time applications, you

  16. Time machines and quantum theory

    E-Print Network [OSTI]

    Mark J Hadley

    2006-12-02

    There is a deep structural link between acausal spacetimes and quantum theory. As a consequence quantum theory may resolve some "paradoxes" of time travel. Conversely, non-time-orientable spacetimes naturally give rise to electric charges and spin half. If an explanation of quantum theory is possible, then general relativity with time travel could be it.

  17. Downstream-based Scheduling for Energy Conservation in Green EPONs

    E-Print Network [OSTI]

    Shihada, Basem

    downstream and upstream ONU transmissions can maximize the ONU sleep time, it jeopardizes the quality is based on the upstream time slot. In this paper, we study the downstream traffic performance in green sleep time, setting identical upstream/downstream transmission cycle times based on a maximum downstream

  18. NewsBank InfoWeb Los Angeles Times

    E-Print Network [OSTI]

    Redmiles, David F.

    NewsBank InfoWeb Los Angeles Times Los Angeles Times September 20, 2003 THE NATION JetBlue Gives Away Data on Passengers Airline apologizes for sharing itineraries with a Pentagon contractor for use information to create a system that would make air travel safer. The New York-based airline apologized

  19. EE Times: Semi News Groups claim breakthroughs in solar cells

    E-Print Network [OSTI]

    Rogers, John A.

    -based, multi-junction solar cells. Module cost is minimized by using high concentration ratio. XEE Times: Semi News Groups claim breakthroughs in solar cells Mark LaPedus Page 1 of 2 EE Times (05 separately claimed breakthroughs in solar cell production. Gallium arsenide (GaAs) and related compounds

  20. Fusion using time-dependent density-constrained DFT

    E-Print Network [OSTI]

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

    2014-02-06

    We present results for calculating fusion cross-sections using a new microscopic approach based on a time-dependent density-constrained DFT calculations. The theory is implemented by using densities and other information obtained from TDDFT time-evolution of the nuclear system as constraint on the density for DFT calculations.

  1. Real-Time Plasma Control Tools for Advanced Tokamak Operation

    SciTech Connect (OSTI)

    Varandas, C. A. F.; Sousa, J.; Rodrigues, A. P.; Carvalho, B. B.; Fernandes, H.; Batista, A. J.; Cruz, N.; Combo, A.; Pereira, R. C. [Centro de FuSao Nuclear, Associacao Euratom/IST, Instituto Superior Tecnico, Av. Rovisco Pais, P-1049-001 Lisbon (Portugal)

    2006-12-04

    Real-time control will play an important role in the operation and scientific exploitation of the new generation fusion devices. This paper summarizes the real-time systems and diagnostics developed by the Portuguese Fusion Euratom Association based on digital signal processors and field programmable gate arrays.

  2. Real Time Pedestrian Tracking using Thermal Infrared Imagery

    E-Print Network [OSTI]

    Del Moral , Pierre

    Real Time Pedestrian Tracking using Thermal Infrared Imagery Jianfu Li 1. Key Laboratory@cqu.edu.cn Abstract--In the study, a real time pedestrian tracking algortithm is presented using thermal infrared imagery. It makes use of the characteristics of pedestrian body regions in infrared images, which is based

  3. Left-Right Symmetric Model from Geometrical Formulation of Gauge Theory in $M_4 \\times Z_2 \\times Z_2$

    E-Print Network [OSTI]

    G. Konisi; T. Saito; Z. Maki; M. Nakahara

    1998-12-08

    The left-right symmetric model (LRSM) with gauge group $SU(2)_{L} \\times SU(2)_{R} \\times U(1)_{B-L}$ is reconstructed from the geometric formulation of gauge theory in $M_4 \\times Z_2 \\times Z_2$ where $M_4$ is the four-dimensional Minkowski space and $Z_2 \\times Z_2$ the discrete space with four points. The geometrical structure of this model becomes clearer compared with other works based on noncommutative geometry. As a result, the Yukawa coupling terms and the Higgs potential are derived in more restricted forms than in the standard LRSM.

  4. Setting and Maintaining Arecibo Observatory's Timing Systems

    E-Print Network [OSTI]

    Frequency Standard 14 Time Code Generators TRAK Synchronized Time Code Generator 38 EECO Time Code Generator the time codes if the TRAC Synchronized Time Code Generator fails. Soon the TrueTime time code generator) Time Code Generator TRAK Synchronized Time Code Generator EECO Time Code Generator Transfer standard

  5. Regenerative memory in time-delayed neuromorphic photonic systems

    E-Print Network [OSTI]

    Romeira, B; Figueiredo, José M L; Barland, S; Javaloyes, J

    2015-01-01

    We investigate a regenerative memory based upon a time-delayed neuromorphic photonic oscillator and discuss the link with temporal localized structures. Our experimental implementation is based upon a optoelectronic system composed of a nanoscale nonlinear resonant tunneling diode coupled to a laser that we link to the paradigm of neuronal activity, the FitzHugh-Nagumo model with delayed feedback.

  6. Local-time effect on small space-time scale

    E-Print Network [OSTI]

    V. A. Panchelyuga; V. A. Kolombet; M. S. Panchelyuga; S. E. Shnoll

    2006-10-18

    The paper presents an investigation of local-time effect - one of the manifestations of macroscopic fluctuations phenomena. Was shown the existence of the named effect for longitudinal distance between locations of measurements up to 500 meters. Also a structure of intervals distribution in neighborhood of local-time peak was studied and splitting of the peak was found out. Obtained results lead to conclusion about sharp anisotropy of space-time.

  7. Real-Time Traffic Maps

    E-Print Network [OSTI]

    Goldsberry, Kirk Patrick

    2007-01-01

    weather maps; they both overlay quantitatively dynamic thematic measurements atop a set of stationary geographic reference layers (base data).

  8. Time Consistent Risk Measure Under Stopping Time Framework ...

    E-Print Network [OSTI]

    2015-02-13

    to the stochastic volatility of security markets and constantly change of economic and financial information, the earliest target reaching time is random, it then ...

  9. Time is not the problem

    E-Print Network [OSTI]

    Olaf Dreyer

    2009-04-22

    Attempts to quantize general relativity encounter an odd problem. The Hamiltonian that normally generates time evolution vanishes in the case of general relativity as a result of diffeomorphism invariance. The theory seems to be saying that time does not exist. The most obvious feature of our world, namely that time seems to progress and that the world changes accordingly becomes a problem in this presumably fundamental theory. This is called the problem of time. In this essay we argue that this problem is the result of an unphysical idealization. We are caught in this "problem of time" trap because we took a wrong turn in the early days of relativity by permanently including a split of geometry and matter into our physical theories. We show that another possibility exists that circumvents the problem of time and also sheds new light on other problems like the cosmological constant problem and the horizon problem in early universe cosmology.

  10. Three-body dwell time

    SciTech Connect (OSTI)

    Kelkar, N. G.

    2010-06-15

    The lifetime of an unstable state or resonance formed as an intermediate state in two-body scattering is known to be related to the dwell time or the time spent within a given region of space by the two interacting particles. This concept is extended to the case of three-body systems and a relation connecting the three-body dwell time with the two-body dwell times of the substructures of the three-body system is derived for the case of separable wave functions. The Kapur-Peierls formalism is revisited to discover one of the first definitions of dwell time in the literature. An extension of the Kapur-Peierls formalism to the three-body case shows that the lifetime of a three-body resonance can indeed be given by the three-body dwell time.

  11. Reactor control rod timing system

    DOE Patents [OSTI]

    Wu, Peter T. K. (Clifton Park, NY)

    1982-01-01

    A fluid driven jet-edge whistle timing system for control rods of a nuclear reactor for producing real-time detection of the timing of each control rod in its scram operation. An important parameter in reactor safety, particularly for liquid metal fast breeder reactors (LMFBR), is the time deviation between the time the control rod is released and the time the rod actually reaches the down position. The whistle has a nearly pure tone signal with center frequency (above 100 kHz) far above the frequency band in which the energy of the background noise is concentrated. Each control rod can be fitted with a whistle with a different frequency so that there is no ambiguity in differentiating the signal from each control rod.

  12. Reactor control rod timing system

    SciTech Connect (OSTI)

    Wu, P.T.

    1982-02-09

    A fluid driven jet-edge whistle timing system for control rods of a nuclear reactor for producing real-time detection of the timing of each control rod in its scram operation. An important parameter in reactor safety, particularly for liquid metal fast breeder reactors (LMFBR), is the time deviation between the time the control rod is released and the time the rod actually reaches the down position. The whistle has a nearly pure tone signal with center frequency (Above 100 kHz) far above the frequency band in which the energy of the background noise is concentrated. Each control rod can be fitted with a whistle with a different frequency so that there is no ambiguity in differentiating the signal from each control rod.

  13. Model-based Risk Assessment What does model-based mean?

    E-Print Network [OSTI]

    Stølen, Ketil

    Model-based Risk Assessment What does model-based mean? Model-based means based on modelling keeping a good overview at the same time. What does Risk Assessment mean? A risk assessment is a process to change the system in order to reduce these indicated risks. Why Risk Assessment? IT-systems get bigger

  14. Commencement Ceremony Department Time Location Department and Major Time Location

    E-Print Network [OSTI]

    Kaji, Hajime

    Engineering 15:30 Bldg. 63 Classroom 01 (2nd Fl.) Industrial and Management Systems Engineering 15:30 Bldg. 63 and Management 15:30 Bldg. 63 Classroom 01 (2nd Fl.) Department Time Location Department and Major Time Location:30 Bldg. 57 202 Modern Mechanical Engineering 10:30 Bldg. 57 202 Industrial and Management Systems

  15. 49 Stress-timed vs. Syllable-timed Languages

    E-Print Network [OSTI]

    Mehler, Jacques

    49 Stress-timed vs. Syllable- timed Languages Marina Nespor Mohinish Shukla Jacques Mehler 1; Prince 1983; Nespor & Vogel 1989; chapter 43: representations of word stress), the element that "establishes order" in the flow of speech is stress: universally, stressed and unstressed positions alternate

  16. Time Structure of Muonic Showers

    E-Print Network [OSTI]

    L. Cazon; R. A. Vazquez; A. A. Watson; E. Zas

    2003-11-10

    An analytical description of the time structure of the pulses induced by muons in air showers at ground level is deduced assuming the production distance distribution for the muons can be obtained elsewhere. The results of this description are compared against those obtained from simulated showers using AIRES. Major contributions to muon time delays are identified and a relation between the time structure and the depth distribution is unveiled.

  17. Seismic velocity estimation from time migration

    E-Print Network [OSTI]

    Cameron, Maria Kourkina

    2007-01-01

    v List of Tables Comparison of time migration and depthof seismic imaging: time migration and depth migration. TimeComparison of time migration and depth migration Adequate

  18. Time and maps Menno-Jan Kraak

    E-Print Network [OSTI]

    Time and maps Menno-Jan Kraak Time and maps ! · Why interested in time? · What is time and · How is time perceived? · How is time represented? Why interested in time? GIScience perspective) - analysis of changes over time - analysis of patterns of change over time ! · Development of methods

  19. Quantum gravity, the origin of time and time's arrow

    SciTech Connect (OSTI)

    Moffat, J.W. (Univ. of Toronto, Ontario (Canada))

    1993-03-01

    The local Lorentz and diffeomorphism symmetries of Einstein's gravitational theory are spontaneously broken by a Higgs mechanism by invoking a phase transition in the early universe, at a critical temperature [Tc] below which the symmetry is restored. The spontaneous breakdown of the vacuum state generates an external time, and the wave function of the universe satisfies a time-dependent Schroedinger equation, which reduces to the Wheeler-deWitt equation in the classical regime for T<[Tc], allowing a semiclassical WKB approximation to the wave function. The conservation of energy is spontaneously violated for T>[Tc], and matter is created fractions of seconds after the big bang, generating the matter in the Universe. The time direction of the vacuum expectation value of the scalar Higgs field generates a time asymmetry, which defines the cosmological arrow of time and the direction of increasing entropy as the Lorentz symmetry is restored at low temperatures. 52 refs.

  20. The Origin of the Solar Flare Waiting-Time Distribution

    E-Print Network [OSTI]

    M. S. Wheatland

    2000-05-08

    It was recently pointed out that the distribution of times between solar flares (the flare waiting-time distribution) follows a power law, for long waiting times. Based on 25 years of soft X-ray flares observed by Geostationary Operational Environmental Satellite (GOES) instruments it is shown that 1. the waiting-time distribution of flares is consistent with a time-dependent Poisson process, and 2. the fraction of time the Sun spends with different flaring rates approximately follows an exponential distribution. The second result is a new phenomenological law for flares. It is shown analytically how the observed power-law behavior of the waiting times originates in the exponential distribution of flaring rates. These results are argued to be consistent with a non-stationary avalanche model for flares.

  1. Nonlinear time-series analysis revisited

    E-Print Network [OSTI]

    Elizabeth Bradley; Holger Kantz

    2015-03-25

    In 1980 and 1981, two pioneering papers laid the foundation for what became known as nonlinear time-series analysis: the analysis of observed data---typically univariate---via dynamical systems theory. Based on the concept of state-space reconstruction, this set of methods allows us to compute characteristic quantities such as Lyapunov exponents and fractal dimensions, to predict the future course of the time series, and even to reconstruct the equations of motion in some cases. In practice, however, there are a number of issues that restrict the power of this approach: whether the signal accurately and thoroughly samples the dynamics, for instance, and whether it contains noise. Moreover, the numerical algorithms that we use to instantiate these ideas are not perfect; they involve approximations, scale parameters, and finite-precision arithmetic, among other things. Even so, nonlinear time-series analysis has been used to great advantage on thousands of real and synthetic data sets from a wide variety of systems ranging from roulette wheels to lasers to the human heart. Even in cases where the data do not meet the mathematical or algorithmic requirements to assure full topological conjugacy, the results of nonlinear time-series analysis can be helpful in understanding, characterizing, and predicting dynamical systems.

  2. One-time pad booster for Internet

    E-Print Network [OSTI]

    Geraldo A. Barbosa

    2007-04-11

    One-time pad encrypted files can be sent through Internet channels using current Internet protocols. However, the need for renewing shared secret keys make this method unpractical. This work shows how users can use a fast physical random generator based on fluctuations of a light field and the Internet channel to directly boost key renewals. The transmitted signals are deterministic but carries imprinted noise that cannot be eliminated by the attacker. Thus, a one-time pad for Internet can be made practical. Security is achieved without third parties and not relying on the difficulty of factoring numbers in primes. An informational fragility to be avoided is discussed. Information-theoretic analysis is presented and bounds for secure operation are determined.

  3. Time Dependence of ACIS Contamination

    E-Print Network [OSTI]

    Grant, Catherine E.

    Time Dependence of ACIS Contamination Chandra Calibration Workshop 27 October 2003 Catherine Grant Source · Measuring the decay · Monitoring contamination with the ECS · Models of ECS time dependence · Monitoring contamination with the LETG · Agreement between models #12;ACIS External Calibration Source

  4. The Time of Our Lives

    E-Print Network [OSTI]

    Mellor, David Hugh

    2001-01-01

    The article shows how McTaggart’s distinction between A- and B-series ways of locating events in time prompted and enabled the twentieth century’s most important advances in the philosophy of time. It argues that, even if the B-series represents...

  5. Phylogenetic invariants for stationary base composition

    E-Print Network [OSTI]

    Allman, Elizabeth S.

    of the models currently assumed in performing inference with real data make an assump- tion of a stable base composition (e.g., all group-based models, the general time-reversible model). However, there are data to similar base frequencies emerging from different lineages. To study this situation, algebraic models

  6. Holographic Space-time and Newton's Law

    E-Print Network [OSTI]

    Tom Banks; Willy Fischler

    2013-10-25

    We derive Newton's Law from the formalism of Holographic Space-Time (HST). More precisely, we show that for a large class of Hamiltonians of the type proposed previously for the HST description of a geodesic in Minkowski space, the eikonal for scattering of two massless particles at large impact parameter scales as expected with the impact parameter and the energies of the particles in the center of mass (CM) frame. We also discuss the criteria for black hole production in this collision, and find an estimate, purely within the HST framework, for the impact parameter at which it sets in, which coincides with the estimate based on general relativity.

  7. The Parkes Pulsar Timing Array

    E-Print Network [OSTI]

    R N Manchester

    2006-04-13

    Given sufficient sensitivity, pulsar timing observations can make a direct detection of gravitational waves passing over the Earth. Pulsar timing is most sensitive to gravitational waves with frequencies in the nanoHertz region, with the most likely astronomical sources being binary super-massive black holes in galaxy cores. The Parkes Pulsar Timing Array project uses the Parkes 64-m radio telescope to make precision timing observations of a sample of about 20 millisecond pulsars with a principal goal of making a direct detection of gravitational waves. Observations commenced about one year ago and so far sub-microsecond timing residuals have been achieved for more than half of these pulsars. New receiver and software systems are being developed with the aim of reducing these residuals to the level believed necessary for a positive detection of gravitational waves.

  8. Time Constraints in Workflow Systems Johann Eder ? , Euthimios Panagos, and Michael Rabinovich

    E-Print Network [OSTI]

    Rabinovich, Michael "Misha"

    not violate any time constraints. The result is a timed activity graph that includes deadline ranges for each, given the activity completion times and execution paths taken in the already­executed portion@research.att.com Abstract. Time management is a critical component of workflow­based process management. Important aspects

  9. Pedestrian Timing Treatment for Coordinated Signal Systems Zong Z. Tian1

    E-Print Network [OSTI]

    Tian, Zong Z.

    Pedestrian Timing Treatment for Coordinated Signal Systems Zong Z. Tian1 Tom Urbanik2 Kent K. Kacir3 Mark A. Vandehey4 Howard Long5 ABSTRACT: Pedestrian timing has always been one of the major issues treatments on pedestrian timings: timing based on pedestrian minimums where the required pedestrian crossing

  10. MyNERSC Gives Users Easier Access to Data, Jobs, Wait Times

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

    MyNERSC Gives Users Easier Access to Data, Jobs, Wait Times April 6, 2015 MyNERSC, a web-based portal that provides NERSC users with real-time information on their jobs, disk...

  11. Quantization of Space and Time in 3 and in 4 Space-time Dimensions

    E-Print Network [OSTI]

    G. 't Hooft

    1996-08-16

    The fact that in Minkowski space, space and time are both quantized does not have to be introduced as a new postulate in physics, but can actually be derived by combining certain features of General Relativity and Quantum Mechanics. This is demonstrated first in a model where particles behave as point defects in 2 space dimensions and 1 time, and then in the real world having 3+1 dimensions. The mechanisms in these two cases are quite different, but the outcomes are similar: space and time form a (non-cummutative) lattice. These notes are short since most of the material discussed in these lectures is based on two earlier papers by the same author (gr-qc/9601014 and gr-qc/9607022), but the exposition given in the end is new.

  12. Stochastic and Deterministic Inversion Methods for History Matching of Production and Time-Lapse Seismic Data 

    E-Print Network [OSTI]

    Watanabe, Shingo

    2013-08-26

    -based inversion methods as a deterministic approach for integrating both production and time-lapse seismic data into high resolution reservoir models. For the ensemble Kalman filter, we develope a physically motivated phase streamline-based covariance...

  13. User Experiment Time-Line

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

    User Experiment Time-Line Event Target Call for proposal 2 months before proposals are due PAC Proposals Due 7 weeks before PAC meeting TAC Report for PAC Proposals (includes...

  14. Time Machine at the LHC

    E-Print Network [OSTI]

    I. Ya. Aref'eva; I. V. Volovich

    2007-10-25

    Recently, black hole and brane production at CERN's Large Hadron Collider (LHC) has been widely discussed. We suggest that there is a possibility to test causality at the LHC. We argue that if the scale of quantum gravity is of the order of few TeVs, proton-proton collisions at the LHC could lead to the formation of time machines (spacetime regions with closed timelike curves) which violate causality. One model for the time machine is a traversable wormhole. We argue that the traversable wormhole production cross section at the LHC is of the same order as the cross section for the black hole production. Traversable wormholes assume violation of the null energy condition (NEC) and an exotic matter similar to the dark energy is required. Decay of the wormholes/time machines and signatures of time machine events at the LHC are discussed.

  15. Vocal Timing in the Bat 

    E-Print Network [OSTI]

    Jarvis, Jenna N

    2013-05-01

    respond to continuous noise by increasing their call rate, and that the switch between the responses to intermittent noise and continuous noise occurs at a duty cycle of 50% or higher. Overall, this dissertation establishes that bats alter the timing...

  16. TIME SCHEDULE WINTER QUARTER 1970

    E-Print Network [OSTI]

    Kaminsky, Werner

    MASTER CON TIME SCHEDULE WINTER QUARTER 1970 ADVANCE REGISTRATION NOVEMBER 3-21 IN, please leave it or pass it along so that other students may use it. #12;Winter Quarter 1970. Examination

  17. Modeling of Time with Metamaterials

    E-Print Network [OSTI]

    Igor I. Smolyaninov; Yu-Ju Hung

    2011-05-12

    Metamaterials have been already used to model various exotic "optical spaces". Here we demonstrate that mapping of monochromatic extraordinary light distribution in a hyperbolic metamaterial along some spatial direction may model the "flow of time". This idea is illustrated in experiments performed with plasmonic hyperbolic metamaterials. Appearance of the "statistical arrow of time" is examined in an experimental scenario which emulates a Big Bang-like event.

  18. Geothermal Exploration Cost and Time

    SciTech Connect (OSTI)

    Jenne, Scott

    2013-02-13

    The Department of Energy’s Geothermal Technology Office (GTO) provides RD&D funding for geothermal exploration technologies with the goal of lowering the risks and costs of geothermal development and exploration. The National Renewable Energy Laboratory (NREL) was tasked with developing a metric in 2012 to measure the impacts of this RD&D funding on the cost and time required for exploration activities. The development of this cost and time metric included collecting cost and time data for exploration techniques, creating a baseline suite of exploration techniques to which future exploration cost and time improvements can be compared, and developing an online tool for graphically showing potential project impacts (all available at http://en.openei.org/wiki/Gateway: Geothermal). This paper describes the methodology used to define the baseline exploration suite of techniques (baseline), as well as the approach that was used to create the cost and time data set that populates the baseline. The resulting product, an online tool for measuring impact, and the aggregated cost and time data are available on the Open Energy Information website (OpenEI, http://en.openei.org) for public access. - Published 01/01/2013 by US National Renewable Energy Laboratory NREL.

  19. On the Nature of Time

    E-Print Network [OSTI]

    Radovan, Mario

    2015-01-01

    The paper puts forward a conceptual framework in which the phenomenon of time can be presented and discussed in a proper way. We argue that change is ontologically and epistemologically a more basic phenomenon than time. Time is an abstract entity created by the human mind on the basis of the experience of change. Physical reality is a process of ceaseless becoming and vanishing; time is not a part of that process. Time is the abstract bank in relation to which we measure the intensity and amount of the flow (change) of physical reality. We must differentiate physical reality from abstract entities (language) by means of which we speak about this reality. It is necessary to differentiate a formal description (formulas) from its interpretation: a correct formal description can be interpreted in a logically inconsistent and factually wrong way. We argue that the discourse about the relativity of time joins (mixes) physical reality and language, and gives an inconsistent interpretation of correct formulas. Regar...

  20. Reduction in maximum time uncertainty of paired time signals

    DOE Patents [OSTI]

    Theodosiou, G.E.; Dawson, J.W.

    1981-02-11

    Reduction in the maximum time uncertainty (t/sub max/ - t/sub min/) of a series of paired time signals t/sub 1/ and t/sub 2/ varying between two input terminals and representative of a series of single events where t/sub 1/ less than or equal to t/sub 2/ and t/sub 1/ + t/sub 2/ equals a constant, is carried out with a circuit utilizing a combination of OR and AND gates as signal selecting means and one or more time delays to increase the minimum value (t/sub min/) of the first signal t/sub 1/ closer to t/sub max/ and thereby reduce the difference. The circuit may utilize a plurality of stages to reduce the uncertainty by factors of 20 to 800.

  1. Storytelling In Space and Time 

    E-Print Network [OSTI]

    Ray, David

    2014-03-31

    An Android based smartphone application called PuzzleMappingAdventure is an exploratory tourist oriented story telling application which was built using GIS techniques. The story which is created is open for interpretation and defined through user...

  2. Static timing analysis in VLSI design

    E-Print Network [OSTI]

    Zhou, Shuo

    2006-01-01

    II.B Static Timing AnalysisStatic Timing Analysis in the Design Flow FalseChip Analysis . . . . . . . . . . . . . . I.C Static Timing

  3. Time Series Analysis 1 Time series in astronomy

    E-Print Network [OSTI]

    Babu, G. Jogesh

    (supernovae, gamma-ray bursts) Difficulties in astronomical time series Gapped data streams: Diurnal & monthly phenomena: thermonuclear (novae, X-ray bursts), magnetic reconnection (solar/stellar flares), star death); pulsation (helioseismology, Cepheids) Stochastic phenomena: accretion (CVs, X-ray binaries, Seyfert gals

  4. Discussion Note Architecture-based motivation vs Reward-based motivation

    E-Print Network [OSTI]

    Sloman, Aaron

    Discussion Note Architecture-based motivation vs Reward-based motivation Aaron Sloman School to change.) CONTENTS (Provisional) Introduction Where do motives come from? My claim Learning and motivation Architecture-based motivation More complex variations Mechanisms required Conclusion Acknowledgements From time

  5. Rule-Based Energy Management System 

    E-Print Network [OSTI]

    Thomasson, F. Y.; Childress, R. L.

    2000-01-01

    -based supervisory system which is interfaced to a DCS. The EMS includes boiler allocation, turbine load allocation, bark optimization, real-time pricing (RTP) tie-line control and coordinated header pressure control. It optimizes the powerhouse operations to meet...

  6. Time-dependent coupled-cluster method for atomic nuclei

    E-Print Network [OSTI]

    D. A. Pigg; G. Hagen; H. Nam; T. Papenbrock

    2012-05-17

    We study time-dependent coupled-cluster theory in the framework of nuclear physics. Based on Kvaal's bi-variational formulation of this method [S. Kvaal, arXiv:1201.5548], we explicitly demonstrate that observables that commute with the Hamiltonian are conserved under time evolution. We explore the role of the energy and of the similarity-transformed Hamiltonian under real and imaginary time evolution and relate the latter to similarity renormalization group transformations. Proof-of-principle computations of He-4 and O-16 in small model spaces, and computations of the Lipkin model illustrate the capabilities of the method.

  7. Time Scaling of Chaotic Systems: Application to Secure Communications

    E-Print Network [OSTI]

    Donatello Materassi; Michele Basso

    2007-10-25

    The paper deals with time-scaling transformations of dynamical systems. Such scaling functions operate a change of coordinates on the time axis of the system trajectories preserving its phase portrait. Exploiting this property, a chaos encryption technique to transmit a binary signal through an analog channel is proposed. The scheme is based on a suitable time-scaling function which plays the role of a private key. The encoded transmitted signal is proved to resist known decryption attacks offering a secure and reliable communication.

  8. A new method for measurement of safety rod drop times

    SciTech Connect (OSTI)

    Pesic, M.; Stefanovic, D. ); Marinkovic, P. )

    1992-10-01

    In this paper, a new method for the accurate measurement of safety rod drop times is proposed. It is based on a fast electromagnetic transducer and an analog-to-digital converter (ADC) conected to a computer system. Evaluation of recorded data is conducted by a developed computer code. The first measurements performed at the HERBE fast-thermal RB reactor show that a relative uncertainty (confidence level 95%) of less than 6% can be achieved in determination of rod drop time (with time intervals ranging from 0.4-10.0 s). Further improvements in accuracy are possible.

  9. Time of flight mass spectrometer

    DOE Patents [OSTI]

    Ulbricht, Jr., William H. (Arvada, CO)

    1984-01-01

    A time-of-flight mass spectrometer is described in which ions are desorbed from a sample by nuclear fission fragments, such that desorption occurs at the surface of the sample impinged upon by the fission fragments. This configuration allows for the sample to be of any thickness, and eliminates the need for complicated sample preparation.

  10. TIME-RESOLVED VIBRATIONAL SPECTROSCOPY

    SciTech Connect (OSTI)

    Andrei Tokmakoff, MIT; Paul Champion, Northeastern University; Edwin J. Heilweil, NIST; Keith A. Nelson, MIT; Larry Ziegler, Boston University

    2009-05-14

    This document contains the Proceedings from the 14th International Conference on Time-Resolved Vibrational Spectroscopy, which was held in Meredith, NH from May 9-14, 2009. The study of molecular dynamics in chemical reaction and biological processes using time-resolved spectroscopy plays an important role in our understanding of energy conversion, storage, and utilization problems. Fundamental studies of chemical reactivity, molecular rearrangements, and charge transport are broadly supported by the DOE�s Office of Science because of their role in the development of alternative energy sources, the understanding of biological energy conversion processes, the efficient utilization of existing energy resources, and the mitigation of reactive intermediates in radiation chemistry. In addition, time-resolved spectroscopy is central to all five of DOE�s grand challenges for fundamental energy science. The Time-Resolved Vibrational Spectroscopy conference is organized biennially to bring the leaders in this field from around the globe together with young scientists to discuss the most recent scientific and technological advances. The latest technology in ultrafast infrared, Raman, and terahertz spectroscopy and the scientific advances that these methods enable were covered. Particular emphasis was placed on new experimental methods used to probe molecular dynamics in liquids, solids, interfaces, nanostructured materials, and biomolecules.

  11. ANDERSON LOCALIZATION FOR TIME PERIODIC

    E-Print Network [OSTI]

    disorder, Anderson localization in Z d is stable un- der localized time-periodic perturbations by proving random Schrodinger operators at large disorder has been well known since the seminal work of Fr is approximated by the potential V . The equation governing the system is (1.5) i @ @t = (#1; + V ) on Z d #2

  12. High resolution time interval counter

    DOE Patents [OSTI]

    Condreva, K.J.

    1994-07-26

    A high resolution counter circuit measures the time interval between the occurrence of an initial and a subsequent electrical pulse to two nanoseconds resolution using an eight megahertz clock. The circuit includes a main counter for receiving electrical pulses and generating a binary word--a measure of the number of eight megahertz clock pulses occurring between the signals. A pair of first and second pulse stretchers receive the signal and generate a pair of output signals whose widths are approximately sixty-four times the time between the receipt of the signals by the respective pulse stretchers and the receipt by the respective pulse stretchers of a second subsequent clock pulse. Output signals are thereafter supplied to a pair of start and stop counters operable to generate a pair of binary output words representative of the measure of the width of the pulses to a resolution of two nanoseconds. Errors associated with the pulse stretchers are corrected by providing calibration data to both stretcher circuits, and recording start and stop counter values. Stretched initial and subsequent signals are combined with autocalibration data and supplied to an arithmetic logic unit to determine the time interval in nanoseconds between the pair of electrical pulses being measured. 3 figs.

  13. High resolution time interval counter

    DOE Patents [OSTI]

    Condreva, Kenneth J. (Livermore, CA)

    1994-01-01

    A high resolution counter circuit measures the time interval between the occurrence of an initial and a subsequent electrical pulse to two nanoseconds resolution using an eight megahertz clock. The circuit includes a main counter for receiving electrical pulses and generating a binary word--a measure of the number of eight megahertz clock pulses occurring between the signals. A pair of first and second pulse stretchers receive the signal and generate a pair of output signals whose widths are approximately sixty-four times the time between the receipt of the signals by the respective pulse stretchers and the receipt by the respective pulse stretchers of a second subsequent clock pulse. Output signals are thereafter supplied to a pair of start and stop counters operable to generate a pair of binary output words representative of the measure of the width of the pulses to a resolution of two nanoseconds. Errors associated with the pulse stretchers are corrected by providing calibration data to both stretcher circuits, and recording start and stop counter values. Stretched initial and subsequent signals are combined with autocalibration data and supplied to an arithmetic logic unit to determine the time interval in nanoseconds between the pair of electrical pulses being measured.

  14. Precision Timing Via Cerenkov Radiation,

    E-Print Network [OSTI]

    McDonald, Kirk

    ) beam splitter EG&G Ortec 9306 EG&G Ortec 9306 Microchannel­plate Photo Multiplier (MCP­PMT) 1 GHz Preamplifier Semiconductor Photo Diode 1 GHz Preamplifier EG&G Ortec 9307 EG&G Ortec 9307 ``Pico Timing Converter (TAC) 10 ns delay Stop Start Multi Channel Analyzer (MCA) beam splitter EG&G Ortec 9306 1 GHz

  15. Theory of Earthquake Recurrence Times

    E-Print Network [OSTI]

    A. Saichev; D. Sornette

    2006-05-31

    The statistics of recurrence times in broad areas have been reported to obey universal scaling laws, both for single homogeneous regions (Corral, 2003) and when averaged over multiple regions (Bak et al.,2002). These unified scaling laws are characterized by intermediate power law asymptotics. On the other hand, Molchan (2005) has presented a mathematical proof that, if such a universal law exists, it is necessarily an exponential, in obvious contradiction with the data. First, we generalize Molchan's argument to show that an approximate unified law can be found which is compatible with the empirical observations when incorporating the impact of the Omori law of earthquake triggering. We then develop the full theory of the statistics of inter-event times in the framework of the ETAS model of triggered seismicity and show that the empirical observations can be fully explained. Our theoretical expression fits well the empirical statistics over the whole range of recurrence times, accounting for different regimes by using only the physics of triggering quantified by Omori's law. The description of the statistics of recurrence times over multiple regions requires an additional subtle statistical derivation that maps the fractal geometry of earthquake epicenters onto the distribution of the average seismic rates in multiple regions. This yields a prediction in excellent agreement with the empirical data for reasonable values of the fractal dimension $d \\approx 1.8$, the average clustering ratio $n \\approx 0.9$, and the productivity exponent $\\alpha \\approx 0.9$ times the $b$-value of the Gutenberg-Richter law.

  16. Reducing EnergyPlus Run Time For Code Compliance Tools

    SciTech Connect (OSTI)

    Athalye, Rahul A.; Gowri, Krishnan; Schultz, Robert W.; Glazer, Jason

    2014-09-12

    Integration of the EnergyPlus ™ simulation engine into performance-based code compliance software raises a concern about simulation run time, which impacts timely feedback of compliance results to the user. EnergyPlus annual simulations for proposed and code baseline building models, and mechanical equipment sizing result in simulation run times beyond acceptable limits. This paper presents a study that compares the results of a shortened simulation time period using 4 weeks of hourly weather data (one per quarter), to an annual simulation using full 52 weeks of hourly weather data. Three representative building types based on DOE Prototype Building Models and three climate zones were used for determining the validity of using a shortened simulation run period. Further sensitivity analysis and run time comparisons were made to evaluate the robustness and run time savings of using this approach. The results of this analysis show that the shortened simulation run period provides compliance index calculations within 1% of those predicted using annual simulation results, and typically saves about 75% of simulation run time.

  17. Time optimal information transfer in spintronics networks

    E-Print Network [OSTI]

    Frank Langbein; Sophie Schirmer; Edmond Jonckheere

    2015-08-04

    Propagation of information encoded in spin degrees of freedom through networks of coupled spins enables important applications in spintronics and quantum information processing. We study control of information propagation in networks of spin-$\\tfrac{1}{2}$ particles with uniform nearest neighbour couplings forming a ring with a single excitation in the network as simple prototype of a router for spin-based information. Specifically optimising spatially distributed potentials, which remain constant during information transfer, simplifies the implementation of the routing scheme. However, the limited degrees of freedom makes finding a control that maximises the transfer probability in a short time difficult. We show that the structure of the eigenvalues and eigenvectors must fulfill a specific condition to be able to maximise the transfer fidelity, and demonstrate that a specific choice among the many potential structures that fulfill this condition significantly improves the solutions found by optimal control.

  18. High resolution time interval meter

    DOE Patents [OSTI]

    Martin, A.D.

    1986-05-09

    Method and apparatus are provided for measuring the time interval between two events to a higher resolution than reliability available from conventional circuits and component. An internal clock pulse is provided at a frequency compatible with conventional component operating frequencies for reliable operation. Lumped constant delay circuits are provided for generating outputs at delay intervals corresponding to the desired high resolution. An initiation START pulse is input to generate first high resolution data. A termination STOP pulse is input to generate second high resolution data. Internal counters count at the low frequency internal clock pulse rate between the START and STOP pulses. The first and second high resolution data are logically combined to directly provide high resolution data to one counter and correct the count in the low resolution counter to obtain a high resolution time interval measurement.

  19. Treating Time Travel Quantum Mechanically

    E-Print Network [OSTI]

    John-Mark A. Allen

    2014-10-10

    The fact that closed timelike curves (CTCs) are permitted by general relativity raises the question as to how quantum systems behave when time travel to the past occurs. Research into answering this question by utilising the quantum circuit formalism has given rise to two theories: Deutschian-CTCs (D-CTCs) and "postselected" CTCs (P-CTCs). In this paper the quantum circuit approach is thoroughly reviewed, and the strengths and shortcomings of D-CTCs and P-CTCs are presented in view of their non-linearity and time travel paradoxes. In particular, the "equivalent circuit model"---which aims to make equivalent predictions to D-CTCs, while avoiding some of the difficulties of the original theory---is shown to contain errors. The discussion of D-CTCs and P-CTCs is used to motivate an analysis of the features one might require of a theory of quantum time travel, following which two overlapping classes of new theories are identified. One such theory, the theory of "transition probability" CTCs (T-CTCs), is fully developed. The theory of T-CTCs is shown not to have certain undesirable features---such as time travel paradoxes, the ability to distinguish non-orthogonal states with certainty, and the ability to clone or delete arbitrary pure states---that are present with D-CTCs and P-CTCs. The problems with non-linear extensions to quantum mechanics are discussed in relation to the interpretation of these theories, and the physical motivations of all three theories are discussed and compared.

  20. Interpolation of raytheory travel times within ray cells

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Interpolation of ray­theory travel times within ray cells Petr Bulant & LudŸek KlimeŸs Department techniques. Several methods based on de­ composition of the model volume into ray cells, and on further interpolation within individual ray cells, were introduced. In the wavefront tracing method (Vinje et al. 1996a

  1. A TECHNIQUE FOR TESTING HIGHLY RELIABLE REAL-TIME SOFTWARE

    E-Print Network [OSTI]

    Bieman, James M.

    Task Plan ® A TECHNIQUE FOR TESTING HIGHLY RELIABLE REAL-TIME SOFTWARE Slide Presentation Biography that uses executable specifications based on Annotated Ada (Anna) for software testing in hard real process and does not interfere with the software under test. 1.0 INTRODUCTION Automating the verification

  2. Cryptanalyzing a discrete-time chaos synchronization secure communication system

    E-Print Network [OSTI]

    Gonzalo Alvarez; Fausto Montoya; Miguel Romera; Gerardo Pastor

    2003-11-21

    This paper describes the security weakness of a recently proposed secure communication method based on discrete-time chaos synchronization. We show that the security is compromised even without precise knowledge of the chaotic system used. We also make many suggestions to improve its security in future versions.

  3. RESEARCH Open Access Longitudinal variability of time-location/activity

    E-Print Network [OSTI]

    Leistikow, Bruce N.

    /weekend), season (warm/cool), sex, employment status, and over the follow-up period. Results: As expected, day- base (CHAD), which houses time-activity data from a large number of studies, are single-day diaries of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits

  4. A Temporal Planning System for Time-Optimal Planning

    E-Print Network [OSTI]

    Garrido, Antonio

    the utility of our system for dealing with temporal planning problems. Key words: planning, temporal planningA Temporal Planning System for Time-Optimal Planning Antonio Garrido, Eva Onaindía and Federico with temporality on actions presents an important challenge to AI planning. Unlike Graphplan-based planners which

  5. NONLINEAR MULTIVARIATE AND TIME SERIES ANALYSIS BY NEURAL NETWORK METHODS

    E-Print Network [OSTI]

    Hsieh, William

    NONLINEAR MULTIVARIATE AND TIME SERIES ANALYSIS BY NEURAL NETWORK METHODS William W. Hsieh] Methods in multivariate statistical analysis are essential for working with large amounts of geophysical multivariate statistical analysis, there is a hierarchy of methods, starting with linear regression at the base

  6. Space-Time Galerkin Projection of Electro-Magnetic Fields

    E-Print Network [OSTI]

    Wang, Zifu; Hofmann, Heath

    2015-01-01

    Spatial Galerkin projection transfers fields between different meshes. In the area of finite element analysis of electromagnetic fields, it provides great convenience for remeshing, multi-physics, domain decomposition methods, etc. In this paper, a space-time Galerkin projection is developed in order to transfer fields between different spatial and temporal discretization bases.

  7. Transit timing with fast cameras on large telescopes

    E-Print Network [OSTI]

    Adams, Elisabeth Rose

    2010-01-01

    Timing and system parameters were measured for seven transiting exoplanets: OGLETR- 56b (11 transits), OGLE-TR-132b (7), OGLE-TR-111b (6), OGLE-TR-113b (6), CoRoT-2b (3), OGLE-TR-10b (3), and XO-2b (2). Ground-based ...

  8. Symbolic Dynamic Analysis of Transient Time Series for Fault

    E-Print Network [OSTI]

    Ray, Asok

    Symbolic Dynamic Analysis of Transient Time Series for Fault Detection in Gas Turbine Engines paper presents a symbolic dynamics-based method for detection of incipient faults in gas turbine engines dynamics, fault detection, aircraft gas turbine engines 1 Introduction Performance monitoring of aircraft

  9. Non-commutative Einstein-Proca Space-time

    E-Print Network [OSTI]

    Blanca Gónzales; Román Linares; Marco Maceda; Oscar Sánchez-Santos

    2014-09-12

    In this work we present a deformed model of Einstein-Proca space-time based on the replacement of point-like sources by non-commutative smeared distributions. We discuss the solutions to the set of non-commutative Einstein-Proca equations thus obtained, with emphasis on the issue of singularities and horizons.

  10. A VME timing system for the tokamak ISTTOK

    SciTech Connect (OSTI)

    Varandas, C.A.F.; Carvalho, B.; Fernandes, H.; Sousa, J.; Cabral, J.A.C.

    1995-05-01

    This paper describes the ISTTOK timing system, which was built under a centralized philosophy based on a locally developed 16 channel, 1 {mu}s maximum resolution, VME unit. The trigger options for each channel are provided, following an innovatory approach, by a programmable pulse multiplexer. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

  11. Online Prediction of the Running Time of Tasks: Summary Peter A. Dinda

    E-Print Network [OSTI]

    Dinda, Peter A.

    of the Running Time Advisor (or RTA) system, the broader context of which it is a part, and the queries(16) models. We have implemented an extremely low overhead online host load prediction system, based Load Prediction System Running Time Advisor Real­time Scheduling Advisor Application Measurement Stream

  12. Online Prediction of the Running Time of Tasks: Summary Peter A. Dinda

    E-Print Network [OSTI]

    Dinda, Peter A.

    of the Running Time Advisor (or RTA) system, the broader context of which it is a part, and the queries(16) models. We have implemented an extremely low overhead online host load prediction system, based Prediction System Running Time Advisor Real-time Scheduling Advisor Application Measurement Stream Load

  13. Multivariate phase space reconstruction by nearest neighbor embedding with different time delays

    E-Print Network [OSTI]

    Sara P. Garcia; Jonas S. Almeida

    2006-09-12

    A recently proposed nearest neighbor based selection of time delays for phase space reconstruction is extended to multivariate time series, with an iterative selection of variables and time delays. A case study of numerically generated solutions of the x- and z coordinates of the Lorenz system, and an application to heart rate and respiration data, are used for illustration.

  14. Time varying, multivariate volume data reduction

    SciTech Connect (OSTI)

    Ahrens, James P; Fout, Nathaniel; Ma, Kwan - Liu

    2010-01-01

    Large-scale supercomputing is revolutionizing the way science is conducted. A growing challenge, however, is understanding the massive quantities of data produced by large-scale simulations. The data, typically time-varying, multivariate, and volumetric, can occupy from hundreds of gigabytes to several terabytes of storage space. Transferring and processing volume data of such sizes is prohibitively expensive and resource intensive. Although it may not be possible to entirely alleviate these problems, data compression should be considered as part of a viable solution, especially when the primary means of data analysis is volume rendering. In this paper we present our study of multivariate compression, which exploits correlations among related variables, for volume rendering. Two configurations for multidimensional compression based on vector quantization are examined. We emphasize quality reconstruction and interactive rendering, which leads us to a solution using graphics hardware to perform on-the-fly decompression during rendering. In this paper we present a solution which addresses the need for data reduction in large supercomputing environments where data resulting from simulations occupies tremendous amounts of storage. Our solution employs a lossy encoding scheme to acrueve data reduction with several options in terms of rate-distortion behavior. We focus on encoding of multiple variables together, with optional compression in space and time. The compressed volumes can be rendered directly with commodity graphics cards at interactive frame rates and rendering quality similar to that of static volume renderers. Compression results using a multivariate time-varying data set indicate that encoding multiple variables results in acceptable performance in the case of spatial and temporal encoding as compared to independent compression of variables. The relative performance of spatial vs. temporal compression is data dependent, although temporal compression has the advantage of offering smooth animations, while spatial compression can handle volumes of larger dimensions.

  15. Base isolation: Fresh insight

    SciTech Connect (OSTI)

    Shustov, V.

    1993-07-15

    The objective of the research is a further development of the engineering concept of seismic isolation. Neglecting the transient stage of seismic loading results in a widespread misjudgement: The force of resistance associated with velocity is mostly conceived as a source of damping vibrations, though it is an active force at the same time, during an earthquake type excitation. For very pliant systems such as base isolated structures with relatively low bearing stiffness and with artificially added heavy damping mechanism, the so called `damping`` force may occur even the main pushing force at an earthquake. Thus, one of the two basic pillars of the common seismic isolation philosophy, namely, the doctrine of usefulness and necessity of a strong damping mechanism, is turning out to be a self-deception, sometimes even jeopardizing the safety of structures and discrediting the very idea of seismic isolation. There is a way out: breaking with damping dependancy.

  16. Selecting Task-Relevant Sources for Just-in-Time Retrieval Just-in-time" information systems monitor their

    E-Print Network [OSTI]

    systems monitor their users' tasks, anticipate task-based information needs, and proactively provide, the burden of nding the right information increases as well. Just- in-time" information systems shield, identi es relevant con- tent areas, and provides area information to the sys- tem. The system

  17. Real time markerless motion tracking using linked kinematic chains

    DOE Patents [OSTI]

    Luck, Jason P. (Arvada, CO); Small, Daniel E. (Albuquerque, NM)

    2007-08-14

    A markerless method is described for tracking the motion of subjects in a three dimensional environment using a model based on linked kinematic chains. The invention is suitable for tracking robotic, animal or human subjects in real-time using a single computer with inexpensive video equipment, and does not require the use of markers or specialized clothing. A simple model of rigid linked segments is constructed of the subject and tracked using three dimensional volumetric data collected by a multiple camera video imaging system. A physics based method is then used to compute forces to align the model with subsequent volumetric data sets in real-time. The method is able to handle occlusion of segments and accommodates joint limits, velocity constraints, and collision constraints and provides for error recovery. The method further provides for elimination of singularities in Jacobian based calculations, which has been problematic in alternative methods.

  18. A Study on the time resolution of Glass RPC

    E-Print Network [OSTI]

    N. Dash; V. M. Datar; G. Majumder

    2014-10-21

    The 50~kton Iron Calorimeter (ICAL) detector at the underground India based Neutrino Observatory (INO) will make measurements on atmospheric neutrinos. Muons produced in charged current (CC) interactions of muon neutrinos with the iron are tracked spatially and temporally through the signals that they produce in the Resistive Plate Chambers~(RPCs) that are interleaved with iron layers. Since the RPCs will be operated in the avalanche mode the signal rise-time is $\\sim~1~\\rm{nsec}$ resulting in a fast time response. While the muon track is derived from the X and Y hit information of the RPCs and the layer number (Z), the upward or downward direction is obtained by using the time information from the detector. Such a capability can be examined by analysing the timing information from $1~\\rm{m}~\\times~1~\\rm{m}$ glass RPCs, with $3~\\rm{cm}$ wide X- and Y- pick-up strips, in a $12$ layer RPC stack that measures cosmic muon events. The present study looks at the pixel-wise time response of these RPCs in order to improve the relative time distribution and hence the up-down discrimination capability. After including the effect of propagation delay in the cable and pick-up panel the time resolution improves, in some cases, to $\\leq~1~\\rm{nsec}$ whereas in some cases there is no significant change. These results will help in significantly improving on the extraction of the directionality of muons produced in CC interactions of $\

  19. On time-interval transformations in special relativity

    E-Print Network [OSTI]

    A. V. Gopala Rao; K. S. Mallesh; K. N. Srinivasa Rao

    2015-06-24

    We revisit the problem of the Lorentz transformation of time-intervals in special relativity. We base our discussion on the time-interval transformation formula $ c\\Delta t' = \\gamma (c\\Delta t - \\vec{\\beta} \\cdot \\Delta \\vec{r}) $ in which $ \\Delta t'$ and $ \\Delta t $ are the time-intervals between a given pair of events, in two inertial frames $ S $ and $ S'$ connected by an general boost. We observe that the Einstein time-dilation-formula, the Doppler formula and the relativity of simultaneity, all follow when one the frames in the time-interval transformation formula is chosen as the canonical frame of the underlying event-pair. We also discuss the interesting special case $ \\Delta t' = \\gamma \\Delta t $ of the time-interval transformation formula obtained by setting $ \\vec{\\beta} \\cdot \\Delta \\vec{r}=0 $ in it and argue why it is really \\textbf{not} the Einstein time-dilation formula. Finally, we present some examples which involve material particles instead of light rays, and highlight the utility of time-interval transformation formula as a calculational tool in the class room.

  20. Timing the Parkes Multibeam Pulsars

    E-Print Network [OSTI]

    R. N. Manchester; A. G. Lyne; F. Camilo; V. M. Kaspi; I. H. Stairs; F. Crawford; D. J. Morris; J. F. Bell; N. D'Amico

    1999-11-17

    Measurement of accurate positions, pulse periods and period derivatives is an essential follow-up to any pulsar survey. The procedures being used to obtain timing parameters for the pulsars discovered in the Parkes multibeam pulsar survey are described. Completed solutions have been obtained so far for about 80 pulsars. They show that the survey is preferentially finding pulsars with higher than average surface dipole magnetic fields. Eight pulsars have been shown to be members of binary systems and some of the more interesting results relating to these are presented.