Sample records for time clocks vending

  1. Talking Vending Machines

    E-Print Network [OSTI]

    Hacker, Randi

    2011-02-02T23:59:59.000Z

    're in the central Tokyo Station and you're thirsty so you go to the, you know, vending machine to buy a drink. Only this is not your average vending machine. Uh uh. This vending machine has opinions on what beverage you want. Sensors built into large touch panels...

  2. Clock rates, clock settings and the physics of the space-time Lorentz transformation

    E-Print Network [OSTI]

    J. H. Field

    2007-12-04T23:59:59.000Z

    A careful study is made of the operational meaning of the time symbols appearing in the space-time Lorentz transformation. Four distinct symbols, with different physical meanings, are needed to describe reciprocal measurements involving stationary and uniformly-moving clocks. Physical predictions concern only the observed rate of a clock as a function of its relative speed, not its setting. How the failure to make this distinction leads to the conventional predictions of spurious `relativity of simultaneity' and `length contraction' effects in special relativity is explained.

  3. Quantum Clocks and the Origin of Time in Complex Systems

    E-Print Network [OSTI]

    Scott Hitchcock

    1999-02-20T23:59:59.000Z

    The origin and nature of time in complex systems is explored using quantum (or 'Feynman') clocks and the signals produced by them. Networks of these clocks provide the basis for the evolution of complex systems. The general concept of 'time' is translated into the 'lifetimes' of these unstable configurations of matter. 'Temporal phase transitions' mark the emergence of classical properties such as irreversibility, entropy, and thermodynamic arrows of time. It is proposed that the creation of the universe can be modeled as a quantum clock. Keywords: the problem of time, the arrow of time, time asymmetry, the many-body problem, cellular networks, complexity, the Wheeler-DeWitt equation, quantum cosmology, and instantons.

  4. Quantum Mechanical Clock and Classical Relativistic Clock

    E-Print Network [OSTI]

    Hitoshi Kitada

    2004-07-08T23:59:59.000Z

    A cyclic nature of quantum mechanical clock is discussed as ``quantization of time." Quantum mechanical clock is seen to be equivalent to the relativistic classical clock.

  5. High Resolution Timing with Low Resolution Clocks A Microsecond Resolution Timer for Sun Workstations

    E-Print Network [OSTI]

    Melvin, Stephen

    High Resolution Timing with Low Resolution Clocks and A Microsecond Resolution Timer for Sun for Sun 3 and Sun 4 workstations1. One can measure average service times without a high resolution clock?" 1. Introduction - Who Needs a Microsecond Clock Beginning with its Sun 3 workstations, Sun

  6. Seattle City Light- Vending Machine Rebate Program

    Broader source: Energy.gov [DOE]

    Seattle City Light offers qualifying customers $80 rebates for the purchase of VendingMiser Energy Efficient Vending Machines. VendingMiser reduces the energy consumption of cold drink vending...

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

    DOE Patents [OSTI]

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

    2004-05-18T23:59:59.000Z

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

  8. A strontium lattice clock with $3 \\times 10^{-17}$ inaccuracy and its frequency

    E-Print Network [OSTI]

    Falke, Stephan; Grebing, Christian; Lipphardt, Burghard; Weyers, Stefan; Gerginov, Vladislav; Huntemann, Nils; Hagemann, Christian; Al-Masoudi, Ali; Häfner, Sebastian; Vogt, Stefan; Sterr, Uwe; Lisdat, Christian

    2013-01-01T23:59:59.000Z

    We have measured the absolute frequency of the optical lattice clock based on $^{87}$Sr at PTB with an uncertainty of $3.9\\times 10^{-16}$ using two caesium fountain clocks. This is close to the accuracy of today's best realizations of the SI second. The absolute frequency of the 5s$^2$ $^1$S$_0$-5s5p $^3$P$_0$ transition in $^{87}$Sr is 429,228,004,229,873.13(17) Hz. Our result is in excellent agreement with recent measurements performed in different laboratories worldwide. We improved the total systematic uncertainty of our Sr frequency standard by a factor of five and reach $3\\times 10^{-17}$, opening new prospects for frequency ratio measurements between optical clocks for fundamental research, geodesy, or optical clock evaluation.

  9. Extended Coherence Time on the Clock Transition of Optically Trapped Rubidium

    SciTech Connect (OSTI)

    Kleine Buening, G.; Will, J.; Ertmer, W.; Rasel, E.; Klempt, C. [Institut fuer Quantenoptik, Leibniz Universitaet Hannover, Welfengarten 1, 30167 Hannover (Germany); Arlt, J. [QUANTOP, Institut for Fysik og Astronomi, Aarhus Universitet, Ny Munkegade 120, 8000 Aarhus C (Denmark); Ramirez-Martinez, F.; Rosenbusch, P. [LNE-SYRTE, Observatoire de Paris, CNRS, UPMC, 61 av de l'Observatoire, 75014 Paris (France); Piechon, F. [Laboratoire de Physique des Solides, CNRS, UMR 8502, Univ. Paris-Sud, 91405 Orsay (France)

    2011-06-17T23:59:59.000Z

    Optically trapped ensembles are of crucial importance for frequency measurements and quantum memories but generally suffer from strong dephasing due to inhomogeneous density and light shifts. We demonstrate a drastic increase of the coherence time to 21 s on the magnetic field insensitive clock transition of {sup 87}Rb by applying the recently discovered spin self-rephasing [C. Deutsch et al., Phys. Rev. Lett. 105, 020401 (2010)]. This result confirms the general nature of this new mechanism and thus shows its applicability in atom clocks and quantum memories. A systematic investigation of all relevant frequency shifts and noise contributions yields a stability of 2.4x10{sup -11{tau}-1/2}, where {tau} is the integration time in seconds. Based on a set of technical improvements, the presented frequency standard is predicted to rival the stability of microwave fountain clocks in a potentially much more compact setup.

  10. Vending Machine Energy Consumption and VendingMiser Evaluation

    E-Print Network [OSTI]

    Ritter, J.; Hugghins, J.

    2000-01-01T23:59:59.000Z

    As an effort to decrease the amount of non-critical energy used on the Texas A&M campus, and to assist Dixie Narco in evaluating the efficiency of their vending machines, the Texas A&M Energy Systems Laboratory investigated the power consumption...

  11. Global Clock, Physical Time Order and Pending Period Analysis in Multiprocessor Systems

    E-Print Network [OSTI]

    Chen, Yunji; Hu, Weiwu

    2009-01-01T23:59:59.000Z

    In multiprocessor systems, various problems are treated with Lamport's logical clock and the resultant logical time orders between operations. However, one often needs to face the high complexities caused by the lack of logical time order information in practice. In this paper, we utilize the \\emph{global clock} to infuse the so-called \\emph{pending period} to each operation in a multiprocessor system, where the pending period is a time interval that contains the performed time of the operation. Further, we define the \\emph{physical time order} for any two operations with disjoint pending periods. The physical time order is obeyed by any real execution in multiprocessor systems due to that it is part of the truly happened operation orders restricted by global clock, and it is then proven to be independent and consistent with traditional logical time orders. The above novel yet fundamental concepts enables new effective approaches for analyzing multiprocessor systems, which are named \\emph{pending period analy...

  12. Covered Product Category: Refrigerated Beverage Vending Machines...

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

    vending machines are equipped with controls or software that put the lighting andor refrigeration systems into a low power state at night, on weekends, or other periods of...

  13. Optical Clock and Drag-Free Requirements for a Shapiro Time-Delay Mission

    E-Print Network [OSTI]

    Neil Ashby; Peter L. Bender

    2011-06-10T23:59:59.000Z

    In the next decade or two, extremely accurate tests of general relativity under extreme conditions are expected from gravitational wave observations of binary black hole mergers with a wide range of mass ratios. In addition, major improvements are planned in both strong and weak equivalence principle tests; clock measurements based on the ACES program on the ISS; more accurate light-bending measurements; and other new types of tests. However, whether these tests are all consistent with general relativity or not, it still appears desirable to proceed with a much improved measurement of the Shapiro time delay. A suggested approach is based on using a high-quality optical clock in a drag-free spacecraft near the sun-earth L1 point and a smaller drag-free transponder spacecraft in a two-year period solar orbit. Laser phase travel-time measurements would be made between the two spacecraft over a period of 10 or 20 days around the time when the line of sight passes through the Sun. The requirements on the optical clock stability and on the drag-free systems will be discussed. The accuracy achievable for the time-delay appears to be better than 1 part in 100 million.

  14. Feynman Clocks, Causal Networks, and The Origin of Hierarchical 'Arrows of Time' in Complex Systems. Part 1: 'Conjectures'

    E-Print Network [OSTI]

    Scott Hitchcock

    2001-02-06T23:59:59.000Z

    A theory of time as 'information' is outlined using new tools such as Feynman Clocks (FCs), Collective Excitation Networks (CENs), Sequential Excitation Networks (SENs), and Plateaus of Complexity (POCs). Applications of this approach range from the Big Bang to the emergence of 'consciousness'.

  15. Special Issue: Space, Time and Number Population clocks: motor timing with

    E-Print Network [OSTI]

    Buonomano, Dean

    from the ability of recur- rent neural networks to generate self-sustained, complex, time with strong internal connections capable of self-sustained activity, whereas sensory timing depends

  16. Covered Product Category: Refrigerated Beverage Vending Machines

    Broader source: Energy.gov [DOE]

    FEMP provides acquisition guidance and Federal efficiency requirements across a variety of product categories, including refrigerated beverage vending machines, which are covered by the ENERGY STARź program. Federal laws and requirements mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law.

  17. Timing Matters: The Role of Circadian Clock Genes In Development and Toxin Responses

    E-Print Network [OSTI]

    Qu, Xiaoyu

    2009-05-15T23:59:59.000Z

    in mouse mammary gland development. To examine clock gene function in toxin responses, we evaluated whether disruption or inhibition of Per1 and/or Per2 alters toxin-induced activity of the AhR signaling pathway in the mouse mammary gland and liver. We...

  18. Using Atomic Clocks to Detect Gravitational Waves

    E-Print Network [OSTI]

    Loeb, Abraham

    2015-01-01T23:59:59.000Z

    Atomic clocks have recently reached a fractional timing precision of $test masses separated by less than a GW wavelength, currently envisioned for the eLISA mission.

  19. Lamar Fleming 564 1 1 UH Vending Locations

    E-Print Network [OSTI]

    Azevedo, Ricardo

    Lamar Fleming 564 1 1 UH Vending Locations Building Map Coke Snack Fresh Coffee Frozen Ice Cream A Basement 534 2 Hilton College 590 4 Houston Science Center 593 1 1 KUHT TV Bldg 536 2 1 1 Lamar Fleming 564

  20. SIMULTANEOUS DEMULTIPLEXING, ELECTRICAL CLOCK RECOVERY, AND OPTICAL CLOCK GENERATION USING

    E-Print Network [OSTI]

    Bowers, John

    SIMULTANEOUS DEMULTIPLEXING, ELECTRICAL CLOCK RECOVERY, AND OPTICAL CLOCK GENERATION USING of the PLL. As a result, simultaneous demultiplexing, electrical clock recovery and optical clock generation), and Masashi Usami (2) 1 : Department of Electrical and Computer Engineering, University of California Santa

  1. Comparison of Test Procedures and Energy Efficiency Criteria in Selected International Standards and Labeling Programs for Clothes Washers, Water Dispensers, Vending Machines and CFLs

    E-Print Network [OSTI]

    Fridley, David

    2010-01-01T23:59:59.000Z

    Requirement for Vending Machines, version 2.0. ” AvailableScheme for Washing Machines. ” Available at: http://2007. “Final Report: Vending Machines Evaluation Standard

  2. Orientation-Dependent Entanglement Lifetime in a Squeezed Atomic Clock

    SciTech Connect (OSTI)

    Leroux, Ian D.; Schleier-Smith, Monika H.; Vuletic, Vladan [Department of Physics, MIT-Harvard Center for Ultracold Atoms and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

    2010-06-25T23:59:59.000Z

    We study experimentally the application of a class of entangled states, squeezed spin states, to the improvement of atomic-clock precision. In the presence of anisotropic noise, the entanglement lifetime is strongly dependent on squeezing orientation. We measure the Allan deviation spectrum of a clock operated with a phase-squeezed input state. For averaging times up to 50 s the squeezed clock achieves a given precision 2.8(3) times faster than a clock operating at the standard quantum limit.

  3. Sun Watching Lesson 4: Making a Sun Clock

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    29 Sun Watching Lesson 4: Making a Sun Clock Lesson 4: Making a Sun Clock A major factor contributing toward our concept of time is based on the apparent motion of the Sun. In this activity, students will construct Pocket Sun Clocks. They are challenged to determine the correct orientation needed for the Sun

  4. Robust Clock Synchronization in Wireless Sensor Networks

    E-Print Network [OSTI]

    Saibua, Sawin

    2010-10-12T23:59:59.000Z

    , and ? represents the clock offset between node A and node B. kX and kY denote the variable portions of delay. 9 The equation (2.1) can also be rewritten as ,, k k k k U d X V d Y ? ? ? ? ? ? ? ? (2.2) where the time differences kU and kV... corresponding to the thk uplink and downlink message exchange, are defined as , ,k k kU T T?? 2 1 and 4, 3,k k kV T T?? respectively. 2.2 Maximum Likelihood Clock Offset Estimation Delay measurements in equation (2.2) produce a MLE of the clock offset...

  5. A microfabricated atomic clock

    SciTech Connect (OSTI)

    Knappe, Svenja; Shah, Vishal; Schwindt, Peter D.D.; Hollberg, Leo; Kitching, John; Liew, Li-Anne; Moreland, John [Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305-3328 (United States); Electromagnetics Division, National Institute of Standards and Technology, Boulder, Colorado 80305-3328 (United States)

    2004-08-30T23:59:59.000Z

    Fabrication techniques usually applied to microelectromechanical systems (MEMS) are used to reduce the size and operating power of the core physics assembly of an atomic clock. With a volume of 9.5 mm{sup 3}, a fractional frequency instability of 2.5x10{sup -10} at 1 s of integration, and dissipating less than 75 mW of power, the device has the potential to bring atomically precise timing to hand-held, battery-operated devices. In addition, the design and fabrication process allows for wafer-level assembly of the structures, enabling low-cost mass-production of thousands of identical units with the same process sequence, and easy integration with other electronics.

  6. Review: Avgust Pavel: Prekmurska Slovenska Slovnica. Vend Nyelvtan

    E-Print Network [OSTI]

    Šek Mertü k, Polonca

    2014-06-25T23:59:59.000Z

    — #28;#24; — 2FHQH#15;#3;]DSLVNL#15;#3;SRURțLOD#3;±#3;5HYLHZV#15;#3;1RWHV#15;#3;5HSRUWV $9*867#3;3$9(/#29; PREKMURSKA SLOVENSKA SLOVNICA. VEND NYELVTAN#17;#3;0DULERU#29;#3;)LOR]RIVND#3;ID-­ NXOWHWD#15;#3;0HGQDURGQD#3;]DORćED#3;2GGHOND#3; ]D...#3;VORYDQVNH#3;MH]LNH#3;LQ#3;NQMLćHYQRVWL#3; #11;=RUD#30;#3;#20;#19;#19;#12;#17;#3;#23;#26;#23;#3;VWU#17; .RQHF#3;OHWD#3;#21;#19;#20;#22;#3;MH#3;Y#3;PHGQDURGQL#3;NQML-­ ćQL#3; ]ELUNL#3; =RUD#3; #11;=RUD#3; #20;#19;#19;#15;#3; XUHGQLN#3; 0DUNR#3...

  7. Clock synchronization for mobile ad hoc networks

    E-Print Network [OSTI]

    Chandra, Rajan

    2013-02-22T23:59:59.000Z

    Time Protocol) used in wired networks (e.g. Internet) to Mobile Ad Hoc Networks (MANets). It may also be achieved by developing other algorithms that achieve clock synchronization and may be suitable for MANets. Using the Network Time Protocol (NTP...

  8. Quantifying the Impact of Daylight Saving Clock Changes

    E-Print Network [OSTI]

    Hill, Simon I.

    Quantifying the Impact of Daylight Saving Clock Changes on Energy Consumption Simon I. Hill of Daylight Saving Clock Changes on Energy Consumption Simon I. Hill, Frédéric Desobry and Yu-Foong Chong May DST Daylight Saving Time EIA Energy Information Administration GDP Gross Domestic Product GMT

  9. Clock Analysis of X10 Nalini Vasudevan

    E-Print Network [OSTI]

    .next(); } async clocked (c) { .. c.next(); .. c.next(); } #12;More about Clocks resume() Indicates the end clocked (c) { .. c.resume() .. c.next(); .. c.next(); } #12;More about Clocks resume() Indicates the end clocked (c) { .. c.resume() .. c.next(); .. c.next(); } next nextnext next #12;More about Clocks resume

  10. Frequency Ratio of ${}^{199}$Hg and ${}^{87}$Sr Optical Lattice Clocks beyond the SI Limit

    E-Print Network [OSTI]

    Yamanaka, Kazuhiro; Ushijima, Ichiro; Takamoto, Masao; Katori, Hidetoshi

    2015-01-01T23:59:59.000Z

    We report on a frequency ratio measurement of a ${}^{199}$Hg-based optical lattice clock referencing a ${}^{87}$Sr-based clock. Evaluations of lattice light shift, including atomic-motion-dependent shift, enable us to achieve a total systematic uncertainty of $7.2 \\times 10^{-17}$ for the Hg clock. The frequency ratio is measured to be $\

  11. Equivalence Principle and Clocks

    E-Print Network [OSTI]

    T. Damour

    1999-04-14T23:59:59.000Z

    String theory suggests the existence of gravitational-strength scalar fields ("dilaton" and "moduli") whose couplings to matter violate the equivalence principle. This provides a new motivation for high-precision clock experiments, as well as a generic theoretical framework for analyzing their significance.

  12. Quantum Limit on Stability of Clocks in a Gravitational Field

    E-Print Network [OSTI]

    Supurna Sinha; Joseph Samuel

    2014-03-21T23:59:59.000Z

    Good clocks are of importance both to fundamental physics and for applications in astronomy, metrology and global positioning systems. In a recent technological breakthrough, researchers at NIST have been able to achieve a stability of 1 part in $10^{18}$ using an Ytterbium clock. This naturally raises the question of whether there are fundamental limits to the stability of clocks. In this paper we point out that gravity and quantum mechanics set a fundamental limit on the stability of clocks. This limit comes from a combination of the uncertainty relation, the gravitational redshift and the relativistic time dilation effect. For example, a single ion hydrogen maser clock in a terrestrial gravitational field cannot achieve a stability better than one part in $10^{22}$. This observation has implications for laboratory experiments involving both gravity and quantum theory.

  13. Apparatus and method for compensating for clock drift in downhole drilling components

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Pixton, David S. (Lehi, UT); Johnson, Monte L. (Orem, UT); Bartholomew, David B. (Springville, UT); Hall, Jr., H. Tracy (Provo, UT)

    2007-08-07T23:59:59.000Z

    A precise downhole clock that compensates for drift includes a prescaler configured to receive electrical pulses from an oscillator. The prescaler is configured to output a series of clock pulses. The prescaler outputs each clock pulse after counting a preloaded number of electrical pulses from the oscillator. The prescaler is operably connected to a compensator module for adjusting the number loaded into the prescaler. By adjusting the number that is loaded into the prescaler, the timing may be advanced or retarded to more accurately synchronize the clock pulses with a reference time source. The compensator module is controlled by a counter-based trigger module configured to trigger the compensator module to load a value into the prescaler. Finally, a time-base logic module is configured to calculate the drift of the downhole clock by comparing the time of the downhole clock with a reference time source.

  14. BCDA Bunch Clock

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScience Program CumulusA t i o nLiquids Reserve ClassBBEEBunch Clock

  15. Clock-Driven Quantum Thermal Engines

    E-Print Network [OSTI]

    Artur S. L. Malabarba; Anthony J. Short; Philipp Kammerlander

    2014-12-03T23:59:59.000Z

    We consider an isolated autonomous quantum machine, where an explicit quantum clock is responsible for performing all transformations on an arbitrary quantum system (the engine), via a time-independent Hamiltonian. In a general context, we show that this model can exactly implement any energy-conserving unitary on the engine, without degrading the clock. Furthermore, we show that when the engine includes a quantum work storage device we can approximately perform completely general unitaries on the remainder of the engine. This framework can be used in quantum thermodynamics to carry out arbitrary transformations of a system, with accuracy and extracted work as close to optimal as desired, whilst obeying the first and second laws of thermodynamics. We thus show that autonomous thermal machines suffer no intrinsic thermodynamic cost compared to externally controlled ones.

  16. The Impact on Energy Consumption of Daylight Saving Clock Changes

    E-Print Network [OSTI]

    Hill, Simon I.

    The Impact on Energy Consumption of Daylight Saving Clock Changes S. I. Hilla, , F. Desobrya , E. W demonstrating po- tential energy savings which could be obtained were Great Britain to maintain Daylight Savings result from an extension of Daylight Saving Time (DST) over the months currently on Greenwich Mean Time

  17. Associative skew clock routing for difficult instances

    E-Print Network [OSTI]

    Kim, Min-seok

    2006-08-16T23:59:59.000Z

    This thesis studies the associative skew clock routing problem, which seeks a clock routing tree such that zero skew is preserved only within identified groups of sinks. Although the number of constraints is reduced, the problem becomes more...

  18. A Clock Reaction Based on Molybdenum Blue

    E-Print Network [OSTI]

    Neuenschwander, Ulrich

    Clock reactions are rare kinetic phenomena, so far limited mostly to systems with ionic oxoacids and oxoanions in water. We report a new clock reaction in cyclohexanol that forms molybdenum blue from a noncharged, yellow ...

  19. Clock Agreement Among Parallel Supercomputer Nodes

    SciTech Connect (OSTI)

    Jones, Terry R.; Koenig, Gregory A.

    2014-04-30T23:59:59.000Z

    This dataset presents measurements that quantify the clock synchronization time-agreement characteristics among several high performance computers including the current world's most powerful machine for open science, the U.S. Department of Energy's Titan machine sited at Oak Ridge National Laboratory. These ultra-fast machines derive much of their computational capability from extreme node counts (over 18000 nodes in the case of the Titan machine). Time-agreement is commonly utilized by parallel programming applications and tools, distributed programming application and tools, and system software. Our time-agreement measurements detail the degree of time variance between nodes and how that variance changes over time. The dataset includes empirical measurements and the accompanying spreadsheets.

  20. Clock Agreement Among Parallel Supercomputer Nodes

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

    Jones, Terry R.; Koenig, Gregory A.

    This dataset presents measurements that quantify the clock synchronization time-agreement characteristics among several high performance computers including the current world's most powerful machine for open science, the U.S. Department of Energy's Titan machine sited at Oak Ridge National Laboratory. These ultra-fast machines derive much of their computational capability from extreme node counts (over 18000 nodes in the case of the Titan machine). Time-agreement is commonly utilized by parallel programming applications and tools, distributed programming application and tools, and system software. Our time-agreement measurements detail the degree of time variance between nodes and how that variance changes over time. The dataset includes empirical measurements and the accompanying spreadsheets.

  1. Optical Atomic Clocks David Hanneke

    E-Print Network [OSTI]

    Hanneke, David

    & collisions f / f0 = 3 x 10-16 S. R. Jefferts, et al., Metrologia 39 321-336 (2002) #12;Hanneke MPPL 2010 2010 ­ Lecture 2 Strontium clock Figure from G. K. Campbell, et al., Metrologia 45 539-548 (2008) Duty

  2. Demystifying Data-Driven and Pausible Clocking Schemes

    E-Print Network [OSTI]

    Mullins, Robert

    designs to networks of energy efficient cores · Distinct block and system- level timing challenges Ports · Arbitrated Inputs ­ At most one input can be served per cycle · Synchronised Inputs ­ Cannot implementation details for each input port type for pausible and data-driven clock generators #12;18 Output Ports

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

    E-Print Network [OSTI]

    Ramakrishnan, Sundararajan

    2010-10-12T23:59:59.000Z

    Page 12 Variation of the maximum skew, wire length and maximum fall time for the IBM benchmarks r1, r4, r5 ............................................... 59 13 Variation of the maximum skew, wire length and maximum fall time... by Elmore Delay =? Vout(t) dt ? 0 = R1(C1 + .. + Cn) + R2(C2 + ? + Cn) +? + Rn Cn (3) Figure 2. RC ladder for linear network The Elmore delay is used for calculating the estimate of the delay and skew while performing the local clock mesh...

  4. Method and apparatus to debug an integrated circuit chip via synchronous clock stop and scan

    DOE Patents [OSTI]

    Bellofatto, Ralph E. (Ridgefield, CT); Ellavsky, Matthew R. (Rochester, MN); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Gooding, Thomas M. (Rochester, MN); Haring, Rudolf A. (Cortlandt Manor, NY); Hehenberger, Lance G. (Leander, TX); Ohmacht, Martin (Yorktown Heights, NY)

    2012-03-20T23:59:59.000Z

    An apparatus and method for evaluating a state of an electronic or integrated circuit (IC), each IC including one or more processor elements for controlling operations of IC sub-units, and each the IC supporting multiple frequency clock domains. The method comprises: generating a synchronized set of enable signals in correspondence with one or more IC sub-units for starting operation of one or more IC sub-units according to a determined timing configuration; counting, in response to one signal of the synchronized set of enable signals, a number of main processor IC clock cycles; and, upon attaining a desired clock cycle number, generating a stop signal for each unique frequency clock domain to synchronously stop a functional clock for each respective frequency clock domain; and, upon synchronously stopping all on-chip functional clocks on all frequency clock domains in a deterministic fashion, scanning out data values at a desired IC chip state. The apparatus and methodology enables construction of a cycle-by-cycle view of any part of the state of a running IC chip, using a combination of on-chip circuitry and software.

  5. Dynamics and performance of clock pendulums

    E-Print Network [OSTI]

    Hoyng, Peter

    2015-01-01T23:59:59.000Z

    We analyze the dynamics of a driven, damped pendulum as used in mechanical clocks. We derive equations for the amplitude and phase of the oscillation, on time scales longer than the pendulum period. The equations are first order ODEs and permit fast simulations of the joint effects of circular and escapement errors, friction, and other disturbances for long times. The equations contain two averages of the driving torque over a period, so that the results are not very sensitive to the fine structure of the driving. We adopt a constant-torque escapement and study the stationary pendulum rate as a function of driving torque and friction. We also study the reaction of the pendulum to a sudden change in the driving torque, and to stationary noisy driving. The equations for the amplitude and phase are shown to describe the pendulum dynamics quite well on time scales of one period and longer. Our emphasis is on a clear exposition of the physics.

  6. Inertial Frames and Clock Rates

    E-Print Network [OSTI]

    Subhash Kak

    2012-02-13T23:59:59.000Z

    This article revisits the historiography of the problem of inertial frames. Specifically, the case of the twins in the clock paradox is considered to see that some resolutions implicitly assume inertiality for the non-accelerating twin. If inertial frames are explicitly identified by motion with respect to the large scale structure of the universe, it makes it possible to consider the relative inertiality of different frames.

  7. Effects of Pinealectomy on Hypothalamic Metabolic and Clock Gene Rhythms

    E-Print Network [OSTI]

    Clauson, Amanda

    2006-07-11T23:59:59.000Z

    by comparing the affects of pinealectomy on 2DG uptake and canonical "clock" gene expression in the hypothalamus of house sparrows, Passer domesticus. Since other brain structures exhibit metabolic and clock gene rhythms, investigation of clock gene expression...

  8. ANALYSIS AND APPLICATION OF INDUCTANCE IN CLOCK DISTRIBUTION NETWORKS

    E-Print Network [OSTI]

    Hu, Xuchu

    2012-01-01T23:59:59.000Z

    Distribution Network Background 2.1 Clock Network DesignClock distribution techniques for low-EMI design. Springerclock distribution in high-performance designs due to their

  9. Global synchronization of parallel processors using clock pulse width modulation

    DOE Patents [OSTI]

    Chen, Dong; Ellavsky, Matthew R.; Franke, Ross L.; Gara, Alan; Gooding, Thomas M.; Haring, Rudolf A.; Jeanson, Mark J.; Kopcsay, Gerard V.; Liebsch, Thomas A.; Littrell, Daniel; Ohmacht, Martin; Reed, Don D.; Schenck, Brandon E.; Swetz, Richard A.

    2013-04-02T23:59:59.000Z

    A circuit generates a global clock signal with a pulse width modification to synchronize processors in a parallel computing system. The circuit may include a hardware module and a clock splitter. The hardware module may generate a clock signal and performs a pulse width modification on the clock signal. The pulse width modification changes a pulse width within a clock period in the clock signal. The clock splitter may distribute the pulse width modified clock signal to a plurality of processors in the parallel computing system.

  10. Polarizabilities of the 87Sr Clock Transition

    E-Print Network [OSTI]

    Shi, C; Eismann, U; Zawada, M; Lorini, L; Targat, R Le; Lodewyck, J

    2015-01-01T23:59:59.000Z

    In this paper, we propose an in-depth review of the vector and tensor polarizabilities of the two energy levels of the 87Sr clock transition whose measurement was reported in [P. G. Westergaard et al., Phys. Rev. Lett. 106, 210801 (2011)]. We conduct a theoretical calculation that reproduces the measured coefficients. In addition, we detail the experimental conditions used for their measurement in two Sr optical lattice clocks, and exhibit the quadratic behaviour of the vector and tensor shifts with the depth of the trapping potential and evaluate their impact on the accuracy of the clock.

  11. Synchronous Droplet Microfluidics: One "Clock" to rule them all

    E-Print Network [OSTI]

    Katsikis, Georgios

    2013-01-01T23:59:59.000Z

    Controlling fluid droplets efficiently in the microscale is of great interest both from a basic science and a technology perspective. We have designed and developed a general-purpose, highly scalable microfluidic control strategy through a single global clock signal that enables synchronous control of arbitrary number of droplets in a planar geometry. A rotating precessive magnetic field provides a global clock signal, enabling simultaneous control of droplet position, velocity and trajectories. Here, in this fluid dynamics video, we explain the main physics of this new microfluidic concept. Video data from droplets moving in sync in different fluidic circuits are included. The experimental setup is described and video data is analyzed to provide a detailed view of the time-dynamics of propagating droplets. Finally, we explore the operational limits of this concept, scaling and phase diagram with physical regime diagram.

  12. Phase measurement system using a dithered clock

    DOE Patents [OSTI]

    Fairley, C.R.; Patterson, S.R.

    1991-05-28T23:59:59.000Z

    A phase measurement system is disclosed which measures the phase shift between two signals by dithering a clock signal and averaging a plurality of measurements of the phase differences between the two signals. 8 figures.

  13. Tuning Genetic Clocks Employing DNA Binding Sites

    E-Print Network [OSTI]

    Del Vecchio, Domitilla

    Periodic oscillations play a key role in cell physiology from the cell cycle to circadian clocks. The interplay of positive and negative feedback loops among genes and proteins is ubiquitous in these networks. Often, delays ...

  14. Experimenting an optical second with strontium lattice clocks

    E-Print Network [OSTI]

    Targat, R Le; Coq, Y Le; Zawada, M; Guéna, J; Abgrall, M; Gurov, M; Rosenbusch, P; Rovera, D G; Nagórny, B; Gartman, R; Westergaard, P G; Tobar, M E; Lours, M; Santarelli, G; Clairon, A; Bize, S; Laurent, P; Lemonde, P; Lodewyck, J

    2013-01-01T23:59:59.000Z

    Progress in realizing the SI second had multiple technological impacts and enabled to further constraint theoretical models in fundamental physics. Caesium microwave fountains, realizing best the second according to its current definition with a relative uncertainty of 2-4x10^(-16), have already been superseded by atomic clocks referenced to an optical transition, both more stable and more accurate. Are we ready for a new definition of the second? Here we present an important step in this direction: our system of five clocks connects with an unprecedented consistency the optical and the microwave worlds. For the first time, two state-of-the-art strontium optical lattice clocks are proven to agree within their accuracy budget, with a total uncertainty of 1.6x10^(-16). Their comparison with three independent caesium fountains shows a degree of reproducibility henceforth solely limited at the level of 3.1x10^(-16) by the best realizations of the microwave-defined second.

  15. Solar Decathlon Teams Working Around the Clock to Assemble Homes...

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

    Teams Working Around the Clock to Assemble Homes For Competition Solar Decathlon Teams Working Around the Clock to Assemble Homes For Competition September 14, 2011 - 12:59pm...

  16. Clock mechanisms and their effects, leads into steam engine

    E-Print Network [OSTI]

    Dugan, David

    2004-08-17T23:59:59.000Z

    In a clock-maker’s shop, Simon Schaffer explains the great precision needed to make clocks, and the development of standardized parts. The feed-back mechanisms or governors are absolutely essential in the first stationary steam engines....

  17. Detection of the gravitomagnetic clock effect

    E-Print Network [OSTI]

    A. Tartaglia

    1999-09-16T23:59:59.000Z

    The essence of the gravitomagnetic clock effect is properly defined showing that its origin is in the topology of world lines with closed space projections. It is shown that, in weak field approximation and for a spherically symmetric central body, the loss of synchrony between two clocks counter-rotating along a circular geodesic is proportional to the angular momentum of the source of the gravitational field. Numerical estimates are presented for objects within the solar system. The less unfavorable situation is found around Jupiter.

  18. Quantum Clock Synchronization with a Single Qudit

    E-Print Network [OSTI]

    Armin Tavakoli; Adán Cabello; Marek ?ukowski; Mohamed Bourennane

    2015-01-23T23:59:59.000Z

    Clock synchronization for nonfaulty processes in multiprocess networks is indispensable for a variety of technologies. A reliable system must be able to resynchronize the nonfaulty processes upon some components failing causing the distribution of incorrect or conflicting information in the network. The task of synchronizing such networks is related to detectable Byzantine agreement (DBA), which can classically be solved using recursive algorithms if and only if less than one-third of the processes are faulty. Here we introduce a nonrecursive quantum algorithm that solves the DBA and achieves clock synchronization in the presence of arbitrary many faulty processes by using only a single quantum system.

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

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

    the Time Change Posted Date: 10172014 Effective November 2, 2014 at 0200 Pacific Daylight Savings Time (Advanced Standard Time), BPA Transmission Services will set all clocks...

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

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

    Pacific Prevailing Time, BPA Transmission Services will set all clocks to Pacific Daylight Saving Time (Advanced Standard Time). For more information concerning how to submit...

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

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

    the Time Change Posted Date: 10292014 Effective November 2, 2014 at 0200 Pacific Daylight Savings Time (Advanced Standard Time), BPA Transmission Services will set all clocks...

  2. Dark Energy from Quantum Uncertainty of Remote Clocks

    E-Print Network [OSTI]

    M. J. Luo

    2014-03-03T23:59:59.000Z

    The observed cosmic acceleration was attributed to a mysterious dark energy in the framework of classical general relativity. The dark energy behaves very similar with vacuum energy in quantum mechanics. However, once the quantum effects are seriously taken into account, it predicts a complete wrong result and leads to a severe fine-tuning. To solve the problem, the exact meaning of time in quantum mechanics is reexamined. We abandon the standard interpretation that time is a global parameter in quantum mechanics, replace it by a quantum dynamical variable playing the role of physical clock. We find that synchronization of two spatially separated clocks can not be precisely realized at quantum level. There is an intrinsic quantum uncertainty of remote simultaneity, which implies an apparent vacuum energy fluctuation and gives an observed dark energy density $\\rho_{de}=\\frac{6}{\\pi}L_{P}^{-2}L_{H}^{-2}$ at leading order, where $L_{P}$ and $L_{H}$ are the Planck and Hubble scale cutoffs. The fraction of the dark energy is given by $\\Omega_{de}=\\frac{2}{\\pi}$ at leading order approximation, which does not evolve with time, so it is "always" comparable to the critical density. This theory is consistent with current cosmic observations.

  3. Standard emitters (clocks) and calibrated standard emitters (clocks) in spaces with affine connections and metrics

    E-Print Network [OSTI]

    Sawa Manoff

    2005-05-12T23:59:59.000Z

    It is shown that the general belief that the frequency and the absolute value of the velocity of periodic signals sent by a standard emitter do not change on the world line of the emitter needs to be revised and new conditions for the existence of a calibrted standard emitter should be taken into account. The notions of a standard clock and of a calibrated standard clock are introduced in a space with affine connections and metrics. The variation of the velocity and of the frequency of a standard clock could be compared with the constant velocity and the constant frequency of a calibrated standard clock along the world line of the observer. This calibrated standard clock is transported by meand of a generalized Fermi-Walker transport along the same world line of the observer. Some remarks about the synchronization of standard clocks in spaces with affine connections and metrics are given. PACS numbers: 95.30.Sf; 04.90.+h; 04.20.Cv; 04.90.+e

  4. Robustness of circadian clocks to daylight fluctuations: hints from the picoeucaryote

    E-Print Network [OSTI]

    1 Robustness of circadian clocks to daylight fluctuations: hints from the picoeucaryote a strategy to minimize the impact of fluctuations in daylight intensity on the core circadian oscillator daylight fluctuations by localizing coupling to the light during specific time intervals. In our model

  5. Orthogonally referenced integrated ensemble for navigation and timing

    DOE Patents [OSTI]

    Smith, Stephen Fulton; Moore, James Anthony

    2014-04-01T23:59:59.000Z

    An orthogonally referenced integrated ensemble for navigation and timing includes a dual-polyhedral oscillator array, including an outer sensing array of oscillators and an inner clock array of oscillators situated inside the outer sensing array. The outer sensing array includes a first pair of sensing oscillators situated along a first axis of the outer sensing array, a second pair of sensing oscillators situated along a second axis of the outer sensing array, and a third pair of sensing oscillators situated along a third axis of the outer sensing array. The inner clock array of oscillators includes a first pair of clock oscillators situated along a first axis of the inner clock array, a second pair of clock oscillators situated along a second axis of the inner clock array, and a third pair of clock oscillators situated along a third axis of the inner clock array.

  6. Orthogonally referenced integrated ensemble for navigation and timing

    DOE Patents [OSTI]

    Smith, Stephen Fulton; Moore, James Anthony

    2013-02-26T23:59:59.000Z

    An orthogonally referenced integrated ensemble for navigation and timing includes a dual-polyhedral oscillator array, including an outer sensing array of oscillators and an inner clock array of oscillators situated inside the outer sensing array. The outer sensing array includes a first pair of sensing oscillators situated along a first axis of the outer sensing array, a second pair of sensing oscillators situated along a second axis of the outer sensing array, and a third pair of sensing oscillators situated along a third axis of the outer sensing array. The inner clock array of oscillators includes a first pair of clock oscillators situated along a first axis of the inner clock array, a second pair of clock oscillators situated along a second axis of the inner clock array, and a third pair of clock oscillators situated along a third axis of the inner clock array.

  7. Time for a Change? It's not just Daylight Savings Time that should be abolished!

    E-Print Network [OSTI]

    1 Time for a Change? It's not just Daylight Savings Time that should be abolished! Sunday, March 11. It is just that the clocks are set differently! By government edict! I advocate not just abolishing Daylight of time zone and/or daylight savings time confusion. Every clock and wristwatch in the world would show

  8. 2014-08-01 Issuance: Test Procedure for Refrigerated Bottled or Canned Beverage Vending Machines; Notice of Proposed Rulemaking and public meeting

    Broader source: Energy.gov [DOE]

    This document is a pre-publication Federal Register notice of proposed rulemaking and public meeting regarding test procedures for refrigerated bottled or canned beverage vending machines, as issued by the Deputy Assistant Secretary for Energy Efficiency on August 1, 2014. Though it is not intended or expected, should any discrepancy occur between the document posted here and the document published in the Federal Register, the Federal Register publication controls. This document is being made available through the Internet solely as a means to facilitate the public's access to this document.

  9. 2014-08-01 Issuance: Energy Conservation Standard for Refrigerated Bottled or Canned Beverage Vending Machines; Notice of Public Meeting and Availability of the Preliminary Technical Support Document

    Broader source: Energy.gov [DOE]

    This document is a pre-publication Federal Register notice of public meeting and availability of the preliminary technical support document for refrigerated bottled or canned beverage vending machines, as issued by the Deputy Assistant Secretary for Energy Efficiency on August 1, 2014. Though it is not intended or expected, should any discrepancy occur between the document posted here and the document published in the Federal Register, the Federal Register publication controls. This document is being made available through the Internet solely as a means to facilitate the public's access to this document.

  10. Sr lattice clock at 1x10^{-16} fractional uncertainty by remote optical evaluation with a Ca clock

    E-Print Network [OSTI]

    A. D. Ludlow; T. Zelevinsky; G. K. Campbell; S. Blatt; M. M. Boyd; M. H. G. de Miranda; M. J. Martin; J. W. Thomsen; S. M. Foreman; Jun Ye; T. M. Fortier; J. E. Stalnaker; S. A. Diddams; Y. Le Coq; Z. W. Barber; N. Poli; N. D. Lemke; K. M. Beck; C. W. Oates

    2008-01-28T23:59:59.000Z

    Optical atomic clocks promise timekeeping at the highest precision and accuracy, owing to their high operating frequencies. Rigorous evaluations of these clocks require direct comparisons between them. We have realized a high-performance remote comparison of optical clocks over km-scale urban distances, a key step for development, dissemination, and application of these optical standards. Through this remote comparison and a proper design of lattice-confined neutral atoms for clock operation, we evaluate the uncertainty of a strontium (Sr) optical lattice clock at the 1x10-16 fractional level, surpassing the best current evaluations of cesium (Cs) primary standards. We also report on the observation of density-dependent effects in the spin-polarized fermionic sample and discuss the current limiting effect of blackbody radiation-induced frequency shifts.

  11. Physical Design for Reduced Delay Uncertainty in High Performance Clock Distribution Networks

    E-Print Network [OSTI]

    Friedman, Eby G.

    531 Physical Design for Reduced Delay Uncertainty in High Performance Clock Distribution Networks, the design of a clock distribution network represents one of the most challenging tasks in the integrated in the design of a high performance clock distribution network [1]. The uncertainty of the clock signal delay

  12. On chip clock synchronization for large digital systems

    E-Print Network [OSTI]

    Brueske, Daniel

    1994-01-01T23:59:59.000Z

    . Figure 4. Figure 5. Data Synchronization. Simple Inverter and Dynamic Power Dissipation. Single Wire Clock Network. H ? Tree Clock Distribution Network. Balanced Clock Tree al'ter [8]. Figurc 6. PLL Based Distributed System. Figurc 7. Phase Lock... is distributed to the various elements using such an architecture. This type of network has been successfully used in the Alpha chip [3]. A large buffer is used to drive a single wire laid across the chip. Several of the buffer ? wire are connected in Vin 1...

  13. E-Print Network 3.0 - asynchronous adaptive time Sample Search...

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

    the paper. 2. CLOCK SYNCHRONIZATION This section reviews the Timing... . In this section, we will show that asynchronism may ... Source: Lai, Ten-Hwang "Steve" -...

  14. Tackling the blackbody shift in a strontium optical lattice clock

    E-Print Network [OSTI]

    Middelmann, Thomas; Falke, Stephan; Winfred, Joseph S R Vellore; Riehle, Fritz; Sterr, Uwe

    2010-01-01T23:59:59.000Z

    A major obstacle for optical clocks is the frequency shift due to black body radiation. We discuss how one can tackle this problem in an optical lattice clock; in our case 87-Sr: firstly, by a measurement of the dc Stark shift of the clock transition and, secondly, by interrogating the atoms in a cryogenic environment. Both approaches rely on transporting ultracold atoms over several cm within a probe cycle. We evaluate this approach of mechanically moving the optical lattice and conclude that it is feasible to transport the atoms over 50 mm within 300 ms. With this transport a dc Stark shift measurement will allow to reduce the contribution of the blackbody radiation to the fractional uncertainty below 2 Ă? 10^â??17 at room temperature by improving the shift coefficient known only from atomic structure calculations up to now. We propose a cryogenic environment at 77 K that will reduce this contribution to few parts in 10^â??18.

  15. Tackling the blackbody shift in a strontium optical lattice clock

    E-Print Network [OSTI]

    Thomas Middelmann; Christian Lisdat; Stephan Falke; Joseph S. R. Vellore Winfred; Fritz Riehle; Uwe Sterr

    2010-09-10T23:59:59.000Z

    A major obstacle for optical clocks is the frequency shift due to black body radiation. We discuss how one can tackle this problem in an optical lattice clock; in our case 87-Sr: firstly, by a measurement of the dc Stark shift of the clock transition and, secondly, by interrogating the atoms in a cryogenic environment. Both approaches rely on transporting ultracold atoms over several cm within a probe cycle. We evaluate this approach of mechanically moving the optical lattice and conclude that it is feasible to transport the atoms over 50 mm within 300 ms. With this transport a dc Stark shift measurement will allow to reduce the contribution of the blackbody radiation to the fractional uncertainty below 2 * 10^-17 at room temperature by improving the shift coefficient known only from atomic structure calculations up to now. We propose a cryogenic environment at 77 K that will reduce this contribution to few parts in 10^-18.

  16. Performance of a 229 Thorium solid-state nuclear clock

    E-Print Network [OSTI]

    Kazakov, G A; Romanenko, V I; Yatsenko, L P; Romanenko, A V; Schreitl, M; Winkler, G; Schumm, T

    2012-01-01T23:59:59.000Z

    The 7.8 eV nuclear isomer transition in 229 Thorium has been suggested as an etalon transition in a new type of optical frequency standard. Here we discuss the construction of a "solid-state nuclear clock" from Thorium nuclei implanted into single crystals transparent in the vacuum ultraviolet range. We investigate crystal-induced line shifts and broadening effects for the specific system of Calcium fluoride. At liquid Nitrogen temperatures, the clock performance will be limited by decoherence due to magnetic coupling of the Thorium nucleus to neighboring nuclear moments, ruling out the commonly used Rabi or Ramsey interrogation schemes. We propose a clock stabilization based on counting of flourescence photons and present optimized operation parameters. Taking advantage of the high number of quantum oscillators under continuous interrogation, a fractional instability level of 10^{-19} might be reached within the solid-state approach.

  17. Performance of a 229 Thorium solid-state nuclear clock

    E-Print Network [OSTI]

    G. A. Kazakov; A. N. Litvinov; V. I. Romanenko; L. P. Yatsenko; A. V. Romanenko; M. Schreitl; G. Winkler; T. Schumm

    2012-10-02T23:59:59.000Z

    The 7.8 eV nuclear isomer transition in 229 Thorium has been suggested as an etalon transition in a new type of optical frequency standard. Here we discuss the construction of a "solid-state nuclear clock" from Thorium nuclei implanted into single crystals transparent in the vacuum ultraviolet range. We investigate crystal-induced line shifts and broadening effects for the specific system of Calcium fluoride. At liquid Nitrogen temperatures, the clock performance will be limited by decoherence due to magnetic coupling of the Thorium nucleus to neighboring nuclear moments, ruling out the commonly used Rabi or Ramsey interrogation schemes. We propose a clock stabilization based on counting of flourescence photons and present optimized operation parameters. Taking advantage of the high number of quantum oscillators under continuous interrogation, a fractional instability level of 10^{-19} might be reached within the solid-state approach.

  18. Evaluating and Minimizing Distributed Cavity Phase Errors in Atomic Clocks

    E-Print Network [OSTI]

    Li, Ruoxin

    2010-01-01T23:59:59.000Z

    We perform 3D finite element calculations of the fields in microwave cavities and analyze the distributed cavity phase errors of atomic clocks that they produce. The fields of cylindrical cavities are treated as an azimuthal Fourier series. Each of the lowest components produces clock errors with unique characteristics that must be assessed to establish a clock's accuracy. We describe the errors and how to evaluate them. We prove that sharp structures in the cavity do not produce large frequency errors, even at moderately high powers, provided the atomic density varies slowly. We model the amplitude and phase imbalances of the feeds. For larger couplings, these can lead to increased phase errors. We show that phase imbalances produce a novel distributed cavity phase error that depends on the cavity detuning. We also design improved cavities by optimizing the geometry and tuning the mode spectrum so that there are negligible phase variations, allowing this source of systematic error to be dramatically reduced.

  19. Evaluating and Minimizing Distributed Cavity Phase Errors in Atomic Clocks

    E-Print Network [OSTI]

    Ruoxin Li; Kurt Gibble

    2010-08-09T23:59:59.000Z

    We perform 3D finite element calculations of the fields in microwave cavities and analyze the distributed cavity phase errors of atomic clocks that they produce. The fields of cylindrical cavities are treated as an azimuthal Fourier series. Each of the lowest components produces clock errors with unique characteristics that must be assessed to establish a clock's accuracy. We describe the errors and how to evaluate them. We prove that sharp structures in the cavity do not produce large frequency errors, even at moderately high powers, provided the atomic density varies slowly. We model the amplitude and phase imbalances of the feeds. For larger couplings, these can lead to increased phase errors. We show that phase imbalances produce a novel distributed cavity phase error that depends on the cavity detuning. We also design improved cavities by optimizing the geometry and tuning the mode spectrum so that there are negligible phase variations, allowing this source of systematic error to be dramatically reduced.

  20. E-Print Network 3.0 - all-optical clock recovery Sample Search...

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

    LETTERS, VOL. 11, NO. 7, JULY 1999 895 Multiwavelength All-Optical Clock Recovery Summary: data. The latter two of these operations would require all-optical clock-recovery...

  1. E-Print Network 3.0 - all-optical clock extraction Sample Search...

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

    Search Powered by Explorit Topic List Advanced Search Sample search results for: all-optical clock extraction Page: << < 1 2 3 4 5 > >> 1 40 GHz all-optical clock recovery using...

  2. Clock for and CAMAC hardware for measurement of volt-amphere characteristic of thermionic converter

    SciTech Connect (OSTI)

    DZHASHIASHVILI, Yu.N.

    1986-09-01T23:59:59.000Z

    This paper describes a clock that is controlled by a computer through a CAMAC output-register module. The clock trigger the load of a thermionic converter for measurement of the volt-ampere charecteristic for 10 msec and synchronizes the start of measurement with the phase of the applied voltage. A schemitic diagram of the clock is shown. The clock increases the data-acquisition speed in successive measurement of several VACs with a limited amount of buffer memory.

  3. Nuclear clocks based on resonant excitation of gamma-transitions

    E-Print Network [OSTI]

    Peik, Ekkehard

    2015-01-01T23:59:59.000Z

    We review the ideas and concepts for a clock that is based on a radiative transition in the nucleus rather than in the electron shell. This type of clock offers advantages like an insensitivity against field-induced systematic frequency shifts and the opportunity to obtain high stability from interrogating many nuclei in the solid state. Experimental work concentrates on the low-energy (about 8 eV) isomeric transition in Th-229. We review the status of the experiments that aim at a direct optical observation of this transition and outline the plans for high-resolution laser spectroscopy experiments.

  4. Nuclear clocks based on resonant excitation of gamma-transitions

    E-Print Network [OSTI]

    Ekkehard Peik; Maxim Okhapkin

    2015-02-25T23:59:59.000Z

    We review the ideas and concepts for a clock that is based on a radiative transition in the nucleus rather than in the electron shell. This type of clock offers advantages like an insensitivity against field-induced systematic frequency shifts and the opportunity to obtain high stability from interrogating many nuclei in the solid state. Experimental work concentrates on the low-energy (about 8 eV) isomeric transition in Th-229. We review the status of the experiments that aim at a direct optical observation of this transition and outline the plans for high-resolution laser spectroscopy experiments.

  5. The Strontium Optical Lattice Clock: Optical Spectroscopy with Sub-Hertz Accuracy

    E-Print Network [OSTI]

    Jin, Deborah

    The Strontium Optical Lattice Clock: Optical Spectroscopy with Sub-Hertz Accuracy by Andrew D of Philosophy Department of Physics 2008 #12;This thesis entitled: The Strontium Optical Lattice Clock: Optical in the above mentioned discipline. #12;Ludlow, Andrew D. (Ph.D., Physics) The Strontium Optical Lattice Clock

  6. Observation and cancellation of the dc Stark shift in strontium optical lattice clocks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Observation and cancellation of the dc Stark shift in strontium optical lattice clocks J fre- quency shift at the 10-13 level by comparing two strontium optical lattice clocks. This frequency candidates for future optical frequency references. Among them, the development of strontium lattice clocks

  7. Cell-autonomous circadian clock of hepatocytes drives rhythms in transcription and polyamine synthesis

    E-Print Network [OSTI]

    Cell-autonomous circadian clock of hepatocytes drives rhythms in transcription and polyamine of the cell-autonomous clock and central pacemaker to rhythmic liver physiology. Through microarray expression oscillations, demonstrating that the cell-autonomous clock can drive many rhythms, and that MMH-D3 is a valid

  8. Unsuitability of the moving light clock system for the Lorentz factor derivation

    E-Print Network [OSTI]

    Tomasz T. Wa?ek

    2009-06-26T23:59:59.000Z

    The moving light clock system was analyzed with respect to the orientation of the wavefront of the light pulse observed in the moving and stationary frames of reference. The plane wavefront of the light pulse was oriented horizontally in both the frames. The wavefront observed in the stationary frame was not perpendicular to the direction of the light pulse propagation. This showed different characteristics of the light pulse than that assumed in the Lorentz factor derivation. According to the horizontal orientation of the wavefront, velocity c was determined as the vertical component of the light pulse motion observed in the stationary frame. Application of this velocity distribution in the Lorentz factor derivation showed the same travel time for the light pulse observed in the moving and stationary frames of reference. The moving light clock system was therefore found to be unsuitable for the Lorentz factor derivation and illustration of time dilation, and shown to illustrate the relativity of the observation of light rather than the relativity of time.

  9. Tevatron injection timing

    SciTech Connect (OSTI)

    Saritepe, S.; Annala, G.

    1993-06-01T23:59:59.000Z

    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.

  10. Testing General Relativity and Alternative Theories of Gravity with Space-based Atomic Clocks and Atom Interferometers

    E-Print Network [OSTI]

    Ruxandra Bondarescu; Andreas Schärer; Philippe Jetzer; Raymond Angélil; Prasenjit Saha; Andrew Lundgren

    2014-12-05T23:59:59.000Z

    The successful miniaturisation of extremely accurate atomic clocks and atom interferometers invites prospects for satellite missions to perform precision experiments. We discuss the effects predicted by general relativity and alternative theories of gravity that can be detected by a clock, which orbits the Earth. Our experiment relies on the precise tracking of the spacecraft using its observed tick-rate. The spacecraft's reconstructed four-dimensional trajectory will reveal the nature of gravitational perturbations in Earth's gravitational field, potentially differentiating between different theories of gravity. This mission can measure multiple relativistic effects all during the course of a single experiment, and constrain the Parametrized Post-Newtonian Parameters around the Earth. A satellite carrying a clock of fractional timing inaccuracy of $\\Delta f/f \\sim 10^{-16}$ in an elliptic orbit around the Earth would constrain the PPN parameters $|\\beta -1|, |\\gamma-1| \\lesssim 10^{-6}$. We also briefly review potential constraints by atom interferometers on scalar tensor theories and in particular on Chameleon and dilaton models.

  11. A new clocking method for a charge coupled device

    SciTech Connect (OSTI)

    Umezu, Rika; Kitamoto, Shunji, E-mail: kitamoto@rikkyo.ac.jp [Department of Physics, College of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima–ku, Tokyo 171–8501 (Japan); Murakami, Hiroshi [Department of Information Science, Faculty of Liberal Arts, Tohoku Gakuin University, 2-1-1 Tenjinzawa, Izumi-ku, Sendai, Miyagi 981-3193 (Japan)

    2014-07-15T23:59:59.000Z

    We propose and demonstrate a new clocking method for a charge-coupled device (CCD). When a CCD is used for a photon counting detector of X-rays, its weak point is a limitation of its counting rate, because high counting rate makes non-negligible pile-up of photons. In astronomical usage, this pile-up is especially severe for an observation of a bright point-like object. One typical idea to reduce the pile-up is a parallel sum (P-sum) mode. This mode completely loses one-dimensional information. Our new clocking method, panning mode, provides complementary properties between the normal mode and the P-sum mode. We performed a simple simulation in order to investigate a pile-up probability and compared the simulated result and actual obtained event rates. Using this simulation and the experimental results, we compared the pile-up tolerance of various clocking modes including our new method and also compared their other characteristics.

  12. Wavelet Analysis of Clock Noise Don Percival

    E-Print Network [OSTI]

    Percival, Don

    #12;Wavelet-Based Analysis of Variance: I · consider `energy' in time series: X 2 = XT X = N-1 t=0 X2 t · energy preserved in MODWT coefficients: X 2 = J0 j=1 Wj 2 + VJ0 2 · leads to analysis of sample variance Y (2, j) since 2 Y (j) = 1 22 Y (2, j) · Q: `old wine in a new bottle,' or something new? 9 #12;What

  13. System and method for adaptively deskewing parallel data signals relative to a clock

    DOE Patents [OSTI]

    Jenkins, Philip Nord (Redwood Shores, CA); Cornett, Frank N. (Chippewa Falls, WI)

    2011-10-04T23:59:59.000Z

    A system and method of reducing skew between a plurality of signals transmitted with a transmit clock is described. Skew is detected between the received transmit clock and each of received data signals. Delay is added to the clock or to one or more of the plurality of data signals to compensate for the detected skew. The delay added to each of the plurality of delayed signals is updated to adapt to changes in detected skew.

  14. System and method for adaptively deskewing parallel data signals relative to a clock

    DOE Patents [OSTI]

    Jenkins, Philip Nord (Eau Claire, WI); Cornett, Frank N. (Chippewa Falls, WI)

    2008-10-07T23:59:59.000Z

    A system and method of reducing skew between a plurality of signals transmitted with a transmit clock is described. Skew is detected between the received transmit clock and each of received data signals. Delay is added to the clock or to one or more of the plurality of data signals to compensate for the detected skew. The delay added to each of the plurality of delayed signals is updated to adapt to changes in detected skew.

  15. E-Print Network 3.0 - adiabatic clock generators Sample Search...

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

    logic (PAL) that operates from a single power-clock supply and outper- forms... a new pass-transistor CMOS adiabatic logic (PAL) that requires only one sinusoidal ......

  16. E-Print Network 3.0 - atomic clock application Sample Search...

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

    and Frequency Division, Ion Storage Group Collection: Physics 9 520 IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, VOL. 48, NO. 2, APRIL 1999 Laser-Cooled Rb Clock Summary:...

  17. About Synchronisation of Clocks in Free Fall Around a Central Body

    E-Print Network [OSTI]

    Francois Goy

    1997-07-02T23:59:59.000Z

    The conventional nature of synchronisation is discussed in inertial frames, where it is found that theories using different synchronisations are experimentally equivalent to special relativity. In contrary, in accelerated systems only a theory maintaining an absolute simultaneity is consistent with the natural behaviour of clocks. The principle of equivalence is discussed, and it is found that any synchronisation can be used locally in a freely falling frame. Whatever the choosen synchronisation, the first derivatives of the metric tensor disapear and a geodesic is locally a straight line. But it is shown that only a synchronisation maintaining an absolute simultaneity allows to define time consistently on circular orbits of a Schwarzschild metric. Key words: special and general relativity, synchronisation, one-way velocity of light, ether, principle of equivalence.

  18. El agua no se vende, el agua se defiende : water rights transfers and community irrigation in New Mexico's acequias

    E-Print Network [OSTI]

    Daly, Brian T. (Brian Thomas)

    2013-01-01T23:59:59.000Z

    Small farmers across New Mexico irrigate with acequias, a system of cooperative, gravity-fed ditches introduced in Spanish colonial times that remains well adapted to managing scarce water in a dry climate. While the acequia ...

  19. Clock-controlled output gene Dbp is a regulator of Arnt/Hif-1? gene expression in pancreatic islet ?-cells

    SciTech Connect (OSTI)

    Nakabayashi, Hiroko; Ohta, Yasuharu, E-mail: yohta@yamaguchi-u.ac.jp; Yamamoto, Masayoshi; Susuki, Yosuke; Taguchi, Akihiko; Tanabe, Katsuya; Kondo, Manabu; Hatanaka, Masayuki; Nagao, Yuko; Tanizawa, Yukio, E-mail: tanizawa@yamaguchi-u.ac.jp

    2013-05-03T23:59:59.000Z

    Highlights: •Arnt mRNA expressed in a circadian manner in mouse pancreatic islets. •Expressions of Dbp and Arnt damped in the islets of a diabetic model mouse. •DBP and E4BP4 regulate Arnt promoter activity by direct binding. •Arnt may have a role in connecting circadian rhythm and metabolism. -- Abstract: Aryl hydrocarbon receptor nuclear translocator (ARNT)/hypoxia inducible factor-1? (HIF-1?) has emerged as a potential determinant of pancreatic ?-cell dysfunction and type 2 diabetes in humans. An 82% reduction in Arnt expression was observed in islets from type 2 diabetic donors as compared to non-diabetic donors. However, few regulators of Arnt expression have been identified. Meanwhile, disruption of the clock components CLOCK and BMAL1 is known to result in hypoinsulinemia and diabetes, but the molecular details remain unclear. In this study, we identified a novel molecular connection between Arnt and two clock-controlled output genes, albumin D-element binding protein (Dbp) and E4 binding protein 4 (E4bp4). By conducting gene expression studies using the islets of Wfs1{sup ?/?} A{sup y}/a mice that develop severe diabetes due to ?-cell apoptosis, we demonstrated clock-related gene expressions to be altered in the diabetic mice. Dbp mRNA decreased by 50%, E4bp4 mRNA increased by 50%, and Arnt mRNA decreased by 30% at Zeitgever Time (ZT) 12. Mouse pancreatic islets exhibited oscillations of clock gene expressions. E4BP4, a D-box negative regulator, oscillated anti-phase to DBP, a D-box positive regulator. We also found low-amplitude circadian expression of Arnt mRNA, which peaked at ZT4. Over-expression of DBP raised both mRNA and protein levels of ARNT in HEK293 and MIN6 cell lines. Arnt promoter-driven luciferase reporter assay in MIN6 cells revealed that DBP increased Arnt promoter activity by 2.5-fold and that E4BP4 competitively inhibited its activation. In addition, on ChIP assay, DBP and E4BP4 directly bound to D-box elements within the Arnt promoter in MIN6 cells. These results suggest that in mouse pancreatic islets mRNA expression of Arnt fluctuates significantly in a circadian manner and that the down-regulation of Dbp and up-regulation E4bp4 contribute to direct suppression of Arnt expression in diabetes.

  20. Robustness of circadian clocks to daylight fluctuations: hints from the picoeucaryote

    E-Print Network [OSTI]

    Lefranc, Marc

    1 Robustness of circadian clocks to daylight fluctuations: hints from the picoeucaryote in daylight intensity on the core circadian oscillator, a type of perturbation that has been rarely considered strategy to shield the circadian clock from daylight fluctuations by localizing coupling to the light

  1. Robustness of Circadian Clocks to Daylight Fluctuations: Hints from the Picoeucaryote Ostreococcus tauri

    E-Print Network [OSTI]

    Lefranc, Marc

    Robustness of Circadian Clocks to Daylight Fluctuations: Hints from the Picoeucaryote Ostreococcus in daylight intensity on the core circadian oscillator, a type of perturbation that has been rarely considered F, Bouget F-Y, et al. (2010) Robustness of Circadian Clocks to Daylight Fluctuations: Hints from

  2. Optimal and Robust Saturated Control for a Clock Generator C. Albea S. Lesecq and D. Puschini

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ,i] [7]. If the clock is generated for the whole circuit, and distributed in each VFI, the maximumOptimal and Robust Saturated Control for a Clock Generator C. Albea S. Lesecq and D. Puschini control engines in each volt- age/frequency island must be taken into account to optimize the circuit

  3. Clock Schedule Verification Under Process Variations Ruiming Chen and Hai Zhou

    E-Print Network [OSTI]

    Zhou, Hai

    Clock Schedule Verification Under Process Variations Ruiming Chen and Hai Zhou Electrical of the structural condi- tions for correct clocking is proposed, where the central prob- lem is to compute the probability of having a positive cycle in a graph with random edge weights. The proposed method only traverses

  4. x0000 -xx xxxx 2006 metrologia Spectral Analysis of Clock Noise: A Primer

    E-Print Network [OSTI]

    Percival, Don

    x0000 - xx xxxx 2006 metrologia Spectral Analysis of Clock Noise: A Primer Donald B Percival fifty years [4, 6, 7, 8, 9, 13, 15, 18, 19, 23, 25, 26, 27, 35, 37, 41, 42, 49]. Given Metrologia of the major characterizations 2 Metrologia, submitted, xx xxxx 2006, 1-29 #12;Spectral Analysis of Clock Noise

  5. Upgrading Amerada-type survey clocks for high-temperature geothermal service

    SciTech Connect (OSTI)

    Major, B.H.; Witten, C.L.

    1980-09-01T23:59:59.000Z

    The Amerada type subsurface recording gauges have been used by the oil and gas industry for many years. These mechanical logging instruments are currently used by the growing goethermal industry. As the gauges were designed for service in low-temperature oil and gas wells, a significant number of failures are occurring at elevated geothermal temperatures. The spring driven mechanical survey clocks appear to be the primary cause of the failures. The clock mechanisms tend to stop or lock-up when exposed to temperatures as high as 300/sup 0/C. This paper summarizes a project that was undertaken to upgrade the survey clocks to 300/sup 0/C capability. The major problems causing clock failure were indentified and corrected by straightforward design modifications together with special lubrication of the moving parts. Several clocks so modified performed reliably, both during laboratory oven tests and during field tests that were performed in actual geothermal wells at temperatures up to 330/sup 0/C.

  6. Microchannel Plate Imaging Photon Counters for Ultraviolet through NIR Detection with High Time Resolution

    E-Print Network [OSTI]

    Michalet, Xavier

    tagging to 20 ns using a clock reference, or to ~100 ps when a separate time to digital converter is used), with event timing of 1 ns using the new electronics scheme. Background rates are dominated by the thermionic

  7. A clock containing a massive object in a superposition of states; what makes Penrosian wavefunction collapse tick?

    E-Print Network [OSTI]

    Tjerk H. Oosterkamp; Jan Zaanen

    2014-07-27T23:59:59.000Z

    Penrose has been advocating the view that the collapse of the wave function is rooted in the incompatibility between general relativity and quantum mechanics. Asserting that gravity wins, he arrived on basis of dimensional analysis at an estimate for the collapse time. This is an ad-hoc affair and here we will present an analysis revolving around the explicit role of time in gravitational wave function collapse. We present a thought experiment, in which we investigate the behavior of a hypothetical clock containing a component which can be in a superposition of states. The clocking action comes from a single strong laser pulse traveling in an optical cavity. At its center it contains a massive object, whose only purpose is to introduce a curvature of space time into the problem. We find that a state of this massive object with a smaller radius, but with the same mass, experiences a larger time delay. Considering a coherent superposition of the large and small object, this suffers from an ambiguity in the definition of a common time for both states. We assert that this time ambiguity will affect the relative phase and that the wave function collapse will occur when this extra phase becomes of order unity. An absolute energy scale enters this equation and we recover Penrose's estimate for the collapse time when we set this equal to the rest mass of the object. This sheds light on the counterintuitive aspect of Penrose's claim that gravitational time dilation effects can play any role dealing with masses of order of micrograms: the rest mass is sufficiently large such that the tiny time differences can confuse the unitary time evolution.

  8. Clock Distribution Network Optimization by Sequential Quadratic Programing

    E-Print Network [OSTI]

    Mekala, Venkata

    2010-07-14T23:59:59.000Z

    ., i.e., L(x; ) = xTD ( 2): (2.4) Denote by rxL(x; ) the gradient vector of the Lagrangian function, i.e., rxL(x; ) = D + rx 2: (2.5) For a speci c setup of all mesh wire widths in the clock network, the gradient of sink delay variance, rx 2, can... and the constraints are satis ed at the optimal point, i.e., for our problem, D + rx 2 = 0; (2.6) 2 0: (2.7) One common way to solve an equation as Eqn. 2.6. is Newton?s method. Basi- cally, Newton?s method searches for the root of an equation f(x) = 0...

  9. Control of rhythmic output from the circadian clock in Neurospora crassa

    E-Print Network [OSTI]

    Lewis, Zachary Austin

    2005-02-17T23:59:59.000Z

    oscillations in biochemical, physiological, or behavioral processes. These rhythms are produced by an endogenous clock that maintains synchrony with the external environment through responses to external stimuli such as light or temperature. The clock... to form an interlocked feedback loop that lies at the heart of the clock in this fungus. This feedback loop, termed the FRQ/WC oscillator, produces a ~24h oscillation in frq mRNA, FRQ protein, and WC-1 protein. In turn, the FRQ/WC oscillator regulates...

  10. Observation and cancellation of the dc Stark shift in strontium optical lattice clocks

    E-Print Network [OSTI]

    Lodewyck, Jérôme; Lorini, Luca; Gurov, Mikhail; Lemonde, Pierre

    2011-01-01T23:59:59.000Z

    We report on the observation of a dc Stark frequency shift at the $10^{-13}$ level by comparing two strontium optical lattice clocks. This frequency shift arises from the presence of electric charges trapped on dielectric surfaces placed under vacuum close to the atomic sample. We show that these charges can be eliminated by shining UV light on the dielectric surfaces, and characterize the residual dc Stark frequency shift on the clock transition at the $10^{-18}$ level by applying an external electric field. This study shows that the dc Stark shift can play an important role in the accuracy budget of lattice clocks, and should be duly taken into account.

  11. Regulation of the p38 MAPK Signaling Pathway by the Circadian Clock

    E-Print Network [OSTI]

    Goldsmith, Charles Sidney

    2013-08-12T23:59:59.000Z

    to more complex organisms. The OS-2 MAPK pathway in the filamentous fungus Neurospora is rhythmically activated by the circadian clock. In order to generate this rhythmic signal, the circadian oscillator directly regulates the rhythmic transcription...

  12. The subunit exchange rate of the cyanobacterial circadian clock component kaic is independent of phosphorylation state

    E-Print Network [OSTI]

    Ihms, Elihu Carl

    2009-05-15T23:59:59.000Z

    The study of the in vitro circadian oscillator of the cyanobacterium Synechococcus elongatus has uncovered a complex interplay of its three protein components. Synchronization of the clock's central oscillatory component, KaiC, has been thought...

  13. Cavity-enabled spin squeezing for a quantum-enhanced atomic clock

    E-Print Network [OSTI]

    Schleier-Smith, Monika Helene

    2011-01-01T23:59:59.000Z

    For the past decade, the stability of microwave atomic clocks has stood at the standard quantum limit, set by the projection noise inherent in measurements on ensembles of uncorrelated particles. Here, I demonstrate an ...

  14. Measuring the evolution of the most stable optical clock G 117-B15A

    E-Print Network [OSTI]

    S. O. Kepler; J. E. S. Costa; B. G. Castanheira; D. E. Winget; Fergal Mullally; R. E. Nather; Mukremin Kilic; Ted von Hippel; Anjum S. Mukadam; Denis J. Sullivan

    2005-07-20T23:59:59.000Z

    We report our measurement of the rate of change of period with time dP/dt for the 215 s periodicity in the pulsating white dwarf G 117-B15A, the most stable optical clock known. After 31 years of observations, we have finally obtained a 4 sigma measurement dP/dt_observed = (4.27 +/- 0.80) x 10^{-15} s/s. Taking into account the proper-motion effect of dP/dt_pm = (7.0 +/- 2.0) x 10^{-16} s/s, we obtain a rate of change of period with time of dP/dt = (3.57 +/- 0.82) x 10^{-15} s/s. This value is consistent with the cooling rate in our white dwarf models only for cores of C or C/O. With the refinement of the models, the observed rate of period change can be used to accurately measure the ratio of C/O in the core of the white dwarf.

  15. A superradiant clock laser on a magicwavelength optical lattice

    E-Print Network [OSTI]

    Thomas Maier; Sebastian Kraemer; Laurin Ostermann; Helmut Ritsch

    2014-02-19T23:59:59.000Z

    An ideal superradiant laser on an optical clock transition of noninteracting cold atoms is predicted to exhibit an extreme frequency stability and accuracy far below mHz-linewidth. In any concrete setup sufficiently many atoms have to be confined and pumped within a finite cavity mode volume. Using a magic wavelength lattice minimizes light shifts and allows for almost uniform coupling to the cavity mode. Never- theless, the atoms are subject to dipole-dipole interaction and collective spontaneous decay which compromises the ultimate frequency stability. In the high density limit the Dicke superradiant linewidth enhancement will broaden the laser line and nearest neighbor couplings will induce shifts and fluctuations of the laser frequency. We estimate the magnitude and scaling of these effects by direct numerical simulations of few atom systems for different geometries and densities. For Strontium in a regularly filled magic wavelength configuration atomic interactions induce small laser frequency shifts only and collective spontaneous emission weakly broadens the laser. These interactions generally enhance the laser sensitivity to cavity length fluctuations but for optimally chosen operating conditions can lead to an improved synchronization of the atomic dipoles.

  16. On the physical basis of cosmic time

    E-Print Network [OSTI]

    Rugh, Svend Erik

    2008-01-01T23:59:59.000Z

    In this manuscript we initiate a systematic examination of the physical basis for the time concept in cosmology. We discuss and defend the idea that the physical basis of the time concept is necessarily related to physical processes which could conceivably take place among the material constituents available in the universe. It is common practice to link the concept of cosmic time with a space-time metric set up to describe the universe at large scales, and then define a cosmic time $t$ as what is measured by a comoving standard clock. We want to examine, however, the physical basis for setting up a comoving reference frame and, in particular, what could be meant by a standard clock. For this purpose we introduce the concept of a `core' of a clock (which, for a standard clock in cosmology, is a scale-setting physical process) and we ask if such a core can--in principle--be found in the available physics contemplated in the various `stages' of the early universe. We find that a first problem arises above the q...

  17. NIST Special Publication 250-59 NIST Computer Time Services

    E-Print Network [OSTI]

    . Authentication of Time Signals 30 III. Operational Procedures of Internet Time Service 31 A. Hardware Maintenance III. Operational Procedures of ACTS 53 A. Hardware Maintenance 53 B. Software Maintenance 53 C of Server Software 7 1. Operating System 7 2. Time Server Software 9 a) Standard daemons 9 b) Clock

  18. High resolution time interval meter

    DOE Patents [OSTI]

    Martin, A.D.

    1986-05-09T23:59:59.000Z

    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. Two ~35 day clocks in Her X-1: evidence for neutron star free precession

    E-Print Network [OSTI]

    R. Staubert; D. Klochkov; K. Postnov; N. Shakura; J. Wilms; R. E. Rothschild

    2008-11-25T23:59:59.000Z

    We present evidence for the existence of two ~35 day clocks in the Her X-1/HZ Her binary system. ~35 day modulations are observed 1) in the Turn-On cycles with two on- and two off-states, and 2) in the changing shape of the pulse profiles which re-appears regularly. The two ways of counting the 35 day cycles are generally in synchronization. This synchronization did apparently break down temporarily during the long Anomalous Low (AL3) which Her X-1 experienced in 1999/2000, in the sense that there must have been one extra Turn-On cycle. Our working hypothesis is that there are two clocks in the system, both with a period of about ~35 days: precession of the accretion disk (the less stable "Turn-On clock") and free precession of the neutron star (the more stable "Pulse profile clock"). We suggest that free precession of the neutron star is the master clock, and that the precession of the accretion disk is basically synchronized to that of the neutron star through a feed-back mechanism in the binary system. However, the Turn-On clock can slip against its master when the accretion disk has a very low inclination, as is observed to be the case during AL3. We take the apparent correlation between the histories of the Turn-Ons, of the Anomalous Lows and of the pulse period evolution, with a 5 yr quasi-periodicity, as evidence for strong physical interaction and feed-back between the major components in the system. We speculate that the 5 yr (10 yr) period is either due to a corresponding activity cycle of HZ Her or a natural ringing period of the physical system of coupled components. The question whether free precession really exists in neutron stars is of great importance for the understanding of matter with supra-nuclear density.

  20. Recent Advances in Synchronous-Clock One-Way-Travel-Time Acoustic Navigation

    E-Print Network [OSTI]

    Whitcomb, Louis L.

    Engineering University of Michigan, Ann Arbor, MI 48109 Email: eustice@umich.edu tDepartment of Mechanical Engineering Johns Hopkins University, Baltimore, MD 21218 Email: llw@jhu.edu +Department of Applied Ocean], [2], on the hull of a surface ship [3], or on sea-ice [4]. With a maximum acoustic range of 5-10 km

  1. Recent Advances in Synchronous-Clock One-Way-Travel-Time Acoustic Navigation

    E-Print Network [OSTI]

    Eustice, Ryan

    University of Michigan, Ann Arbor, MI 48109 Email: eustice@umich.edu Department of Mechanical Engineering Johns Hopkins University, Baltimore, MD 21218 Email: llw@jhu.edu Department of Applied Ocean Physics [1], [2], on the hull of a surface ship [3], or on sea-ice [4]. With a maximum acoustic range of 5

  2. Daylight Saving Time Begins on Sunday, March 8; Set Clocks Ahead One Hour |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed Newcatalyst phasesData Files Data Files 1 EIA BestDavidNERSC FileUserJefferson

  3. Sensitivity Evaluation of Global Resonant H-Tree Clock Distribution Networks

    E-Print Network [OSTI]

    Friedman, Eby G.

    . This approach lowers the power consumption, since the energy resonates between the electric and magnetic fieldsSensitivity Evaluation of Global Resonant H-Tree Clock Distribution Networks Jonathan Rosenfeld and Eby G. Friedman Department of Electrical and Computer Engineering University of Rochester Rochester

  4. Detecting Global Predicates in Distributed Systems with Clocks Scott D. Stoller

    E-Print Network [OSTI]

    Stoller, Scott

    detection modalities, i.e., 3 meanings of \\predicate held during a computation", namely: PossdbDetecting Global Predicates in Distributed Systems with Clocks Scott D. Stoller Computer Science"). This paper de nes these modalities and gives e cient algorithms for detecting them. The algorithms are based

  5. Efficiency with Linear Prices? A Theoretical and Experimental Analysis of the Combinatorial Clock

    E-Print Network [OSTI]

    Cengarle, MarĂ­a Victoria

    Efficiency with Linear Prices? A Theoretical and Experimental Analysis of the Combinatorial Clock with complementarities among goods as they can be found in procurement, energy markets, transportation, and the sale simplicity and for its highly usable price discovery, derived by the use of linear prices. Unfor- tunately

  6. Resolution to Support the Extension of the Tenure Clock for Johnson School Faculty Appointments

    E-Print Network [OSTI]

    Hemami, Sheila S.

    Resolution to Support the Extension of the Tenure Clock for Johnson School Faculty Appointments of the other business schools and universities with which the Johnson School competes for assistant professors, Whereas the Johnson School is significantly hampered in its recruitment and retention of promising

  7. Modeling the observed proton aurora and ionospheric convection responses to changes in the IMF clock angle

    E-Print Network [OSTI]

    Lockwood, Mike

    Modeling the observed proton aurora and ionospheric convection responses to changes in the IMF clock angle: 1. Persistence of cusp proton aurora K. Throp, M. Lockwood,1 B. S. Lanchester, and S. K employ a numerical model of cusp ion precipitation and proton aurora emission to fit variations

  8. BATTERY AWARE TASK SCHEDULING FOR A SYSTEM-ON-A-CHIP USING VOLTAGE/CLOCK SCALING

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    is closest to the [12]; however we use Li-Ion based battery model of [13] to guide the schedul- ing processBATTERY AWARE TASK SCHEDULING FOR A SYSTEM-ON-A-CHIP USING VOLTAGE/CLOCK SCALING Princey Chowdhury Engineering Tempe AZ 85287 ABSTRACT Battery lifetime is a critical parameter in the operation of mobile

  9. Exploring Ramsey-coherent population trapping atomic clock realized with pulsed microwave modulated laser

    SciTech Connect (OSTI)

    Yang, Jing; Yun, Peter [Key Laboratory of Atomic Frequency Standards, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China); Tian, Yuan; Tan, Bozhong [Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074 (China); Gu, Sihong, E-mail: shgu@wipm.ac.cn [Key Laboratory of Atomic Frequency Standards, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China); Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074 (China)

    2014-03-07T23:59:59.000Z

    A scheme for a Ramsey-coherent population trapping (CPT) atomic clock that eliminates the acousto-optic modulator (AOM) is proposed and experimentally studied. Driven by a periodically microwave modulated current, the vertical-cavity surface-emitting laser emits a continuous beam that switches between monochromatic and multichromatic modes. Ramsey-CPT interference has been studied with this mode-switching beam. In eliminating the AOM, which is used to generate pulsed laser in conventional Ramsey-CPT atomic clock, the physics package of the proposed scheme is virtually the same as that of a conventional compact CPT atomic clock, although the resource budget for the electronics will slightly increase as a microwave switch should be added. By evaluating and comparing experimentally recorded signals from the two Ramsey-CPT schemes, the short-term frequency stability of the proposed scheme was found to be 46% better than the scheme with AOM. The experimental results suggest that the implementation of a compact Ramsey-CPT atomic clock promises better frequency stability.

  10. Analysis and optimization of VLSI Clock Distribution Networks for skew variability reduction

    E-Print Network [OSTI]

    Rajaram, Anand K.

    2004-11-15T23:59:59.000Z

    synthesis.The second part of the thesis deals with optimizing a given clock tree to minimize the unwanted skew variations. Non-tree CDNs have been recognized as a promising approach to overcome the variation problem. We propose a novel non-tree CDN obtained...

  11. The Euclid space-time diagram of the theory of relativity

    E-Print Network [OSTI]

    W. LiMing

    2014-06-03T23:59:59.000Z

    A conventional space-time diagram is $r-ct$ one, which satisfies the Minkowski geometry. This geometry conflict the intuition from the Euclid geometry. In this work an Euclid space-time diagram is proposed to describe relativistic world lines with an exact Euclid geometry. The relativistic effects such as the dilation of moving clocks, the contraction of moving length, and the twin paradox can be geometrically expressed in the Euclid space-time diagram. It is applied to the case of a satellite clock to correct the gravitational effect. It is found that this Euclid space-time diagram is much more intuitive than the conventional space-time diagram.

  12. On the physical basis of cosmic time

    E-Print Network [OSTI]

    Svend Erik Rugh; Henrik Zinkernagel

    2008-05-13T23:59:59.000Z

    In this manuscript we initiate a systematic examination of the physical basis for the time concept in cosmology. We discuss and defend the idea that the physical basis of the time concept is necessarily related to physical processes which could conceivably take place among the material constituents available in the universe. It is common practice to link the concept of cosmic time with a space-time metric set up to describe the universe at large scales, and then define a cosmic time $t$ as what is measured by a comoving standard clock. We want to examine, however, the physical basis for setting up a comoving reference frame and, in particular, what could be meant by a standard clock. For this purpose we introduce the concept of a `core' of a clock (which, for a standard clock in cosmology, is a scale-setting physical process) and we ask if such a core can--in principle--be found in the available physics contemplated in the various `stages' of the early universe. We find that a first problem arises above the quark-gluon phase transition (which roughly occurs when the cosmological model is extrapolated back to $\\sim 10^{-5}$ seconds) where there might be no bound systems left, and the concept of a physical length scale to a certain extent disappears. A more serious problem appears above the electroweak phase transition believed to occur at $\\sim 10^{-11}$ seconds. At this point the property of mass (almost) disappears and it becomes difficult to identify a physical basis for concepts like length scale, energy scale and temperature -- which are all intimately linked to the concept of time in modern cosmology. This situation suggests that the concept of a time scale in `very early' universe cosmology lacks a physical basis or, at least, that the time scale will have to be based on speculative new physics.

  13. Pulse transmission transmitter including a higher order time derivate filter

    DOE Patents [OSTI]

    Dress Jr., William B.; Smith, Stephen F.

    2003-09-23T23:59:59.000Z

    Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission transmitter includes: a clock; a pseudorandom polynomial generator coupled to the clock, the pseudorandom polynomial generator having a polynomial load input; an exclusive-OR gate coupled to the pseudorandom polynomial generator, the exclusive-OR gate having a serial data input; a programmable delay circuit coupled to both the clock and the exclusive-OR gate; a pulse generator coupled to the programmable delay circuit; and a higher order time derivative filter coupled to the pulse generator. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.

  14. Architecture-Dependent Execution Time of Shor's Algorithm

    E-Print Network [OSTI]

    Rodney Van Meter; Kohei M. Itoh; Thaddeus D. Ladd

    2006-05-25T23:59:59.000Z

    We show how the execution time of algorithms on quantum computers depends on the architecture of the quantum computer, the choice of algorithms (including subroutines such as arithmetic), and the ``clock speed'' of the quantum computer. The primary architectural features of interest are the ability to execute multiple gates concurrently, the number of application-level qubits available, and the interconnection network of qubits. We analyze Shor's algorithm for factoring large numbers in this context. Our results show that, if arbitrary interconnection of qubits is possible, a machine with an application-level clock speed of as low as one-third of a (possibly encoded) gate per second could factor a 576-bit number in under one month, potentially outperforming a large network of classical computers. For nearest-neighbor-only architectures, a clock speed of around twenty-seven gates per second is required.

  15. Aging-Associated Enzyme Human Clock-1: Substrate-Mediated Reduction of the Diiron Center for 5-Demethoxyubiquinone Hydroxylation

    E-Print Network [OSTI]

    Lu, Tsai-Te

    The mitochondrial membrane-bound enzyme Clock-1 (CLK-1) extends the average longevity of mice and Caenorhabditis elegans, as demonstrated for ?clk-1 constructs for both organisms. Such an apparent impact on aging and the ...

  16. Design Methodology for Clocked Storage Elements Robust to Process Variations Joosik Moon , Mustafa Aktan , and Vojin G. Oklobdzija

    E-Print Network [OSTI]

    California at Davis, University of

    are selected and evaluated by using energy-delay space analysis. The delay variations of the energy-efficient designs for each clocked storage element are measured and compared. We show how much topology selection

  17. Odd q-state clock spin-glass models in three dimensions, asymmetric phase diagrams, and multiple algebraically ordered phases

    E-Print Network [OSTI]

    Ilker, Efe

    Distinctive orderings and phase diagram structures are found, from renormalization-group theory, for odd q-state clock spin-glass models in d = 3 dimensions. These models exhibit asymmetric phase diagrams, as is also the ...

  18. "Wild clocks": New directions for studying circadian biology in the wild Project leaders: Barbara Helm & Davide Dominoni

    E-Print Network [OSTI]

    Glasgow, University of

    "Wild clocks": New directions for studying circadian biology in the wild Project leaders: Barbara fitness and health. Specifically, we will use recording techniques such as telemetry in the wild

  19. Doppler-free spectroscopy of the 1S0-3P0 optical clock transition in laser-cooled fermionic isotopes of neutral mercury

    E-Print Network [OSTI]

    M. Petersen; R. Chicireanu; S. T. Dawkins; D. V. Magalhăes; C. Mandache; Y. Lecoq; A. Clairon; S. Bize

    2008-07-22T23:59:59.000Z

    We have performed for the first time direct laser spectroscopy of the 1S0-3P0 optical clock transition at 265.6 nm in fermionic isotopes of neutral mercury laser-cooled in a magneto-optical trap. Spectroscopy is performed by measuring the depletion of the magneto-optical trap induced by the excitation of the long-lived 3P0 state by a probe at 265.6 nm. Measurements resolve the Doppler-free recoil doublet allowing for a determination of the transition frequency to an uncer- tainty well below the Doppler-broadened linewidth. We have performed absolute measurement of the frequency with respect to an ultra-stable reference monitored by LNE-SYRTE fountain pri- mary frequency standards using a femtosecond laser frequency comb. The measured frequency is 1128575290808 +/- 5.6 kHz in 199Hg and 1128569561140 +/- 5.3 kHz in 201Hg, more than 4 orders of magnitude better than previous indirect determinations. Owing to a low sensitivity to blackbody radiation, mercury is a promising candidate for reaching the ultimate performance of optical lattice clocks.

  20. Highly charged ions for atomic clocks and search for variation of the fine structure constant

    E-Print Network [OSTI]

    Dzuba, V A

    2015-01-01T23:59:59.000Z

    We review a number of highly charged ions which have optical transitions suitable for building extremely accurate atomic clocks. This includes ions from Hf$^{12+}$ to U$^{34+}$, which have the $4f^{12}$ configuration of valence electrons, the Ir$^{17+}$ ion, which has a hole in almost filled $4f$ subshell, the Ho$^{14+}$, Cf$^{15+}$, Es$^{17+}$ and Es$^{16+}$ ions. Clock transitions in most of these ions are sensitive to variation of the fine structure constant, $\\alpha$ ($\\alpha = e^2/\\hbar c$). E.g., californium and einsteinium ions have largest known sensitivity to $\\alpha$-variation while holmium ion looks as the most suitable ion for experimental study. We study the spectra of the ions and their features relevant to the use as frequency standards.

  1. Pulse transmission receiver with higher-order time derivative pulse correlator

    DOE Patents [OSTI]

    Dress Jr., William B.; Smith, Stephen F.

    2003-09-16T23:59:59.000Z

    Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission receiver includes: a higher-order time derivative pulse correlator; a demodulation decoder coupled to the higher-order time derivative pulse correlator; a clock coupled to the demodulation decoder; and a pseudorandom polynomial generator coupled to both the higher-order time derivative pulse correlator and the clock. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.

  2. Clock-Gating and Its Application to Low Power Design of Sequential Circuits Department of Electrical Engineering-Systems, University of Southern California

    E-Print Network [OSTI]

    Pedram, Massoud

    the master clock. Two common sequential circuits, i.e. 8421 BCD code up-counter and three-excess counter

  3. A time-based energy-efficient analog-to-digital converter

    E-Print Network [OSTI]

    Yang, Heemin Yi, 1976-

    2006-01-01T23:59:59.000Z

    Dual-slope converters use time to perform analog-to-digital conversion but require 2N+1 clock cycles to achieve N bits of precision. We describe a novel algorithm that also uses time to perform analog-to-digital conversion ...

  4. Overcoming correlated noise in quantum systems: How mediocre clocks make good qubits

    E-Print Network [OSTI]

    P. J. J. O'Malley; J. Kelly; R. Barends; B. Campbell; Y. Chen; Z. Chen; B. Chiaro; A. Dunsworth; A. G. Fowler; I. -C. Hoi; E. Jeffrey; A. Megrant; J. Mutus; C. Neill; C. Quintana; P. Roushan; D. Sank; A. Vainsencher; J. Wenner; T. C. White; A. N. Korotkov; A. N. Cleland; John M. Martinis

    2014-11-10T23:59:59.000Z

    A precise measurement of dephasing over a range of timescales is critical for improving quantum gates beyond the error correction threshold. We present a method for measuring dephasing in experimental quantum systems based on randomized benchmarking that excels at measuring small levels of phase noise at the timescales relevant to gates. We find our SQUID-based qubit is not limited by 1/f flux noise, but instead observe a previously unreported telegraph noise mechanism. We demonstrate that full understanding of dephasing allows for the use of "mediocre clocks"--systems with correlated phase noise--as good qubits.

  5. Synchronizing an aging brain: can entraining circadian clocks by food slow Alzheimer's disease?

    E-Print Network [OSTI]

    Kent, Brianne A.

    2014-09-01T23:59:59.000Z

    in the external environment. When the SCN is unable to entrain to light-dark cycles, such as when the SCN is experimentally ablated or an animal is in con- ditions of constant darkness, daylight no longer acts as a zeitgeber and circadian organization gradually... . The behavioral arrhythmia was not due to a failing central clock. If these findings translate to AD patients, then it would suggest that the SCN would stay entrained to daylight while the peripheral rhythms affecting behavior become out of sync. If circadian...

  6. The 8 O'Clock Arc: A Serendipitous Discovery of a Strongly Lensed Lyman Break Galaxy in the SDSS DR4 Imaging Data

    SciTech Connect (OSTI)

    Allam, Sahar S.; /Fermilab /Wyoming U.; Tucker, Douglas L.; Lin, Huan; Diehl, H.Thomas; Annis, James; Buckley-Geer, Elizabeth J.; /Fermilab; Frieman, Joshua A.; /Fermilab

    2006-11-01T23:59:59.000Z

    We report on the serendipitous discovery of the brightest Lyman Break Galaxy (LBG) currently known, a galaxy at z = 2.73 that is being strongly lensed by the z = 0.38 Luminous Red Galaxy (LRG) SDSS J002240.91+143110.4. The arc of this gravitational lens system, which we have dubbed the ''8 o'clock arc'' due to its time of discovery, was initially identified in the imaging data of the Sloan Digital Sky Survey Data Release 4 (SDSS DR4); followup observations on the Astrophysical Research Consortium (ARC) 3.5m telescope at Apache Point Observatory confirmed the lensing nature of this system and led to the identification of the arc's spectrum as that of an LBG. The arc has a spectrum and a redshift remarkably similar to those of the previous record-holder for brightest LBG (MS 1512-cB58, a.k.a ''cB58''), but, with an estimated total magnitude of (g,r,i) = (20.0,19.2,19.0) and surface brightness of ({mu}{sub g}, {mu}{sub r}, {mu}{sub i}) = (23.3, 22.5, 22.3) mag arcsec{sup -2}, the 8 o'clock arc is thrice as bright. The 8 o'clock arc, which consists of three lensed images of the LBG, is 162{sup o}(9.6'') long and has a length-to-width ratio of 6:1. A fourth image of the LBG--a counter-image--can also be identified in the ARC 3.5m g-band images. A simple lens model for the system assuming a singular isothermal ellipsoid potential yields an Einstein radius of {theta}{sub Ein} = 2.91'' {+-} 0.14'', a total mass for the lensing LRG (within the 10.6 {+-} 0.5 h{sup -1} kpc enclosed by the lensed images) of 1.04 x 10{sup 12} h{sup -1} M{sub {circle_dot}}, and a magnification factor for the LBG of 12.3{sub -3.6}{sup +15}. The LBG itself is intrinsically quite luminous ({approx} 6 x L{sub *}) and shows indications of massive recent star formation, perhaps as high as 160 h{sup -1} M{sub {circle_dot}} yr{sup -1}.

  7. A Low Noise Programmable Clock Multiplier based on a Pulse Injection-Locked Oscillator with a Highly-Digital Tuning Loop

    E-Print Network [OSTI]

    Perrott, Michael

    such that injection-locking is maintained across thermal variations will potentially undermine the ability to achieveA Low Noise Programmable Clock Multiplier based on a Pulse Injection-Locked Oscillator injection- locked oscillator (PILO) that provides low jitter clock multiplication of a clean input reference

  8. Verification of Real-time Probabilistic Systems 8.1. Introduction

    E-Print Network [OSTI]

    Oxford, University of

    method, the forwards symbolic and backwards symbolic approaches and the digital clocks tech- nique to as a clock valuation. The set of all clock valuations is denoted by TX . Let 0 TX be the clock valuation that assigns 0 to all clocks in X. For any v TX and t T, we use v+t to denote the clock valuation defined

  9. A thirty-two clock hour driver education classroom curriculum guide

    E-Print Network [OSTI]

    Richardson, William Lee

    2012-06-08T23:59:59.000Z

    A THIRTY-TWO CLOCK HOUR DRIVER EDUCATION CLASSROOM CURRICULUM GUIDE A R e c o r d o f St u d y by WILLIAM LEE RICHARDSON S u b m i t t e d t o t h e O f f i c e o f G r a d u a t e S t u d i e s o f Texas A&M U n i v e r s i t y i n p a r t i... a l f u l f i l l m e n t o f t h e r e q u i r e m e n t s f o r t h e de g r e e o f DOCTOR OF EDUCATION December 1990 M a j o r S u b j e c t : I n d u s t r i a l E d u c a t i o n A THIRTY-TWO CLOCK HOUR DRIVER EDUCATION CLASSROOM...

  10. Vending Machine Controls | 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 CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov PtyInformation UCOpen EnergyVelankani Group Jump to: navigation,

  11. Beverage Vending Machines | 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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists' ResearchTheMarketing,Energy and NaturalBethel ValleyMembershipThe Department

  12. Covered Product Category: Refrigerated Beverage Vending Machines |

    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:Year in Review: Top FiveDepartmentfor EngineeringDepartment ofBoilersDataHot FoodPre-Rinse

  13. Three-photon-absorption resonance for all-optical atomic clocks Sergei Zibrov,1,2,3,4

    E-Print Network [OSTI]

    Walsworth, Ronald L.

    Three-photon-absorption resonance for all-optical atomic clocks Sergei Zibrov,1,2,3,4 Irina, driving atoms coherently from state c to b , fol- lowed by a one-photon absorption from field P, which January 2005; published 7 July 2005 We report an experimental study of an all-optical three-photon-absorption

  14. An Enhanced Design Methodology for Resonant Clock Somayyeh Rahimian, Vasilis Pavlidis, Xifan Tang, and Giovanni De Micheli

    E-Print Network [OSTI]

    De Micheli, Giovanni

    up to 24% #12;2 and 51%, respectively, as compared to state of the art methods. If a low area consumption and/or area overhead of the clock distribution network. Simulation results indicate up to 57 to 15% and the signal swing is also improved by 44%. Depending on whether power or area is the design

  15. Preemptive Virtual Clock: A Flexible, Efficient, and Cost-effective QOS Scheme for Networks-on-Chip

    E-Print Network [OSTI]

    Grot, Boris

    insights lead us to propose a novel QOS system called Preemptive Virtual Clock (PVC). PVC provides strong without per-flow buffering at the routers and with minimal buffering at the source nodes. PVC averts prior, PVC enables a trade-off between the strength of the guarantees and overall throughput. Finally, PVC

  16. NATURE PHYSICS | VOL 8 | FEBRUARY 2012 | www.nature.com/naturephysics 101 The hands of the Doomsday Clock have

    E-Print Network [OSTI]

    Loss, Daniel

    of the power plant. (Brighter news, as Nature Physics goes to press, is that the Main Ring of J of global threat, notably that of climate change. In 1947, the clock was set initially at seven minutes the issues of both nuclear materials and the environment -- that is, the safety of nuclear power

  17. Characterization of PHYTOCHROME B and CONSTANS: Key Regulators of Flowering Time in Sorghum

    E-Print Network [OSTI]

    Yang, Shanshan

    2014-07-10T23:59:59.000Z

    of the circadian clock form a negative feedback loop: TIMING OF CAB EXPRESSION 1 (TOC1) activates expression of the Myb factors CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) and LATE ELONGATED HYPOCOTYL 8 (LHY), which in turn negatively regulate TOC1 expression [35... identity genes SOC1, LFY and AP1, modulating the floral transition. In the photoperiod pathway, light signal is perceived by phytochromes and cryptochromes. Rhythmic expression of central oscillators, TOC1, CCA1 and LHY modulates GI, a direct output gene...

  18. Nonstandard Analysis Applied to Special and General Relativity - The Theory of Infinitesimal Light-Clocks

    E-Print Network [OSTI]

    Robert A. Herrmann

    2014-02-14T23:59:59.000Z

    Nonstandard analysis and electromagnetic propagation properties are used to derive all of the fundamental results for the Special Theory of Relativity. Infinitesimal modeling via infinitesimal light-clocks is used to derive two general line-elements (metrics) without the use of Riemannian geometry. By substituting potential velocities, the Schwarzschild, quasi and modified Schwarzschild, de Sitter, Robertson-Walker and similar line-elements are derived. New black hole and quasi-white hole investigations are presented. A new fixed method using separating operators is used to obtain the major predictions for the relativistic alterations in natural-system behavior. The major conclusion is that all such changes are related to electromagnetic properties and that Riemannian geometry is but an analogue model for natural-system behavior.

  19. Minimizing the Energy Cost of Throughput in a Linear Pipeline by Opportunistic Time Borrowing

    E-Print Network [OSTI]

    Pedram, Massoud

    Minimizing the Energy Cost of Throughput in a Linear Pipeline by Opportunistic Time Borrowing a technique to optimize the energy-delay product of a synchronous linear pipeline circuit with dynamic error and clock frequency of the design by exploiting slacks that are present in various stages of the pipeline

  20. Self-timed rings as low-phase noise programmable oscillators

    E-Print Network [OSTI]

    Boyer, Edmond

    to generate multi-phase clocks due to their simple structure, low cost and good integration in the design and to generate a phase noise in accordance with the specifications. Test chips have been designed and fabricated increases the phase noise. Today many studies are oriented toward Self-Timed Ring (STR) oscillators which

  1. An N-atom Collective State Atomic Clock with Root-N Fold Increase in Effective Frequency and Root-N Fold Reduction in Fringe Width

    E-Print Network [OSTI]

    May E. Kim; Resham Sarkar; Renpeng Fang; Selim M. Shahriar

    2014-12-15T23:59:59.000Z

    We describe a collective state atomic clock with Ramsey fringes narrowed by a factor of $\\sqrt{N}$ compared to a conventional clock, N being the number of non-interacting atoms, without violating the uncertainty relation. This narrowing is explained as being due to interferences among the collective states, representing an effective $\\sqrt{N}$ fold increase in the clock frequency, without entanglement. The detection process, which measures a collective state, can be used to increase the quantum efficiency of detection significantly, yielding a net improvement in stability by as much as a factor of 10.

  2. Low-Variation 1 MHz Clock Generator,High Sensitivity Linear Voltage-to-Frequency Converter,and High-PSR Bias Circuit for NTSC SYNC Separation.

    E-Print Network [OSTI]

    Lee, Tzung-Je

    2004-01-01T23:59:59.000Z

    ??This thesis includes three topics. The first topic is a low-variation 1 MHz clock generator. The second one is a high sensitivity linear voltage-to-frequency converter.… (more)

  3. Experimental Results in Synchronous-Clock One-Way-Travel-Time Acoustic Navigation for Autonomous Underwater Vehicles

    E-Print Network [OSTI]

    Whitcomb, Louis L.

    Architecture & Marine Engineering University of Michigan, Ann Arbor, MI 48109 email: eustice@umich.edu Department of Mechanical Engineering Johns Hopkins University, Baltimore, MD 21218 email: llw [1], [2], on the hull of a surface ship [3], or on sea-ice [4]. With a maximum acoustic range of 5

  4. The subunit exchange rate of the cyanobacterial circadian clock component KaiC is independent of phosphorylation state

    E-Print Network [OSTI]

    Ihms, Elihu Carl

    2008-10-10T23:59:59.000Z

    of Advisory Committee: Dr. Andy LiWang The study of the in vitro circadian oscillator of the cyanobacterium Synechococcus elongatus has uncovered a complex interplay of its three protein components. Synchronization of the clock's central oscillatory component...C, this study has shown that shuffling rates are largely unaffected by phosphorylation state. These findings conflict with previous reports and hence revise our understanding of this oscillator. iv ACKNOWLEDGEMENTS I would like to thank my committee chair...

  5. Nano-Hertz Gravitational Waves Searches with Interferometric Pulsar Timing Experiments

    E-Print Network [OSTI]

    Massimo Tinto

    2011-01-20T23:59:59.000Z

    We estimate the sensitivity to nano-Hertz gravitational waves of pulsar timing experiments in which two highly-stable millisecond pulsars are tracked simultaneously with two neighboring radio telescopes that are referenced to the same time-keeping subsystem (i.e. "the clock"). By taking the difference of the two time-of-arrival residual data streams we can exactly cancel the clock noise in the combined data set, thereby enhancing the sensitivity to gravitational waves. We estimate that, in the band ($10^{-9} - 10^{-8}$) Hz, this "interferometric" pulsar timing technique can potentially improve the sensitivity to gravitational radiation by almost two orders of magnitude over that of single-telescopes. Interferometric pulsar timing experiments could be performed with neighboring pairs of antennas of the forthcoming large arraying projects.

  6. The day/night switch of the circadian clock of synechococcus elongatus and hydrogen bonds of dna and rna

    E-Print Network [OSTI]

    Kim, Yong-Ick

    2009-05-15T23:59:59.000Z

    THE DAY/NIGHT SWITCH OF THE CIRCADIAN CLOCK OF SYNECHOCOCCUS ELONGATUS AND HYDROGEN BONDS OF DNA AND RNA A Dissertation by YONG-ICK KIM Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... 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 Approved by: Co-Chairs of Committee, Pingwei Li Andy C. LiWang Committee Members, Susan S...

  7. Critical analysis and remedy of switching failures in straintronic logic using Bennett clocking in the presence of thermal fluctuations

    SciTech Connect (OSTI)

    Roy, Kuntal, E-mail: royk@purdue.edu [School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)] [School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)

    2014-01-06T23:59:59.000Z

    Straintronic logic is a promising platform for beyond Moore's law computing. Using Bennett clocking mechanism, information can propagate through an array of strain-mediated multiferroic nanomagnets, exploiting the dipolar coupling between the magnets without having to physically interconnect them. Here, we perform a critical analysis of switching failures, i.e., error in information propagation due to thermal fluctuations through a chain of such straintronic devices. We solved stochastic Landau-Lifshitz-Gilbert equation considering room-temperature thermal perturbations and show that magnetization switching may fail due to inherent magnetization dynamics accompanied by thermally broadened switching delay distribution. Avenues available to circumvent such issue are proposed.

  8. A 10Gb/s Full On-chip Bang-Bang Clock and Data Recovery System Using an Adaptive Loop Bandwidth Strategy

    E-Print Network [OSTI]

    Jeon, Hyung-Joon

    2010-10-12T23:59:59.000Z

    A 10GB/S FULL ON-CHIP BANG-BANG CLOCK AND DATA RECOVERY SYSTEM USING AN ADAPTIVE LOOP BANDWIDTH STRATEGY A Thesis by HYUNG-JOON JEON Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 2009 Major Subject: Electrical Engineering A 10GB/S FULL ON-CHIP BANG-BANG CLOCK AND DATA RECOVERY SYSTEM USING AN ADAPTIVE LOOP BANDWIDTH STRATEGY A Thesis by HYUNG-JOON JEON...

  9. gwangui.hong@se.kaist.ac.kr, ekjee@se.kaist.ac.kr, bae@se.kaist.ac.kr Systematic code verification for properties of real-time

    E-Print Network [OSTI]

    Jee, Eunkyoung

    ] . . UPPAAL [4] . TIMES Linux , ANSI-C CBMC(Bounded Model Checking for C/C++)[5_trans() , . CBMC ANSI-C , SAT(satisfiability problem) . CBMC main() , assert() (3 ), ANSI-C . VVI 1 7 . assert(!hp || rdClock(Ventricle_x)

  10. IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 38, NO. 12, DECEMBER 2003 2181 A 40-Gb/s Clock and Data Recovery Circuit in

    E-Print Network [OSTI]

    Razavi, Behzad

    Abstract--A phase-locked clock and data recovery circuit incorporates a multiphase LC oscillator and a quarter-rate bang-bang phase detector. The oscillator is based on differential excitation of a closed. Index Terms--CDR circuits, demultiplexers, injection locking, oscillators, phase detectors, phase-locked

  11. High q-state clock spin glasses in three dimensions and the Lyapunov exponents of chaotic phases and chaotic phase boundaries

    E-Print Network [OSTI]

    Ilker, Efe

    Spin-glass phases and phase transitions for q-state clock models and their q ? ? limit the XY model, in spatial dimension d = 3, are studied by a detailed renormalization-group study that is exact for the d = 3 hierarchical ...

  12. Sub-picosecond Resolution Time-to-Digital Converter

    SciTech Connect (OSTI)

    Ph D, Vladimir Bratov; Ph D, Vladimir Katzman; MS EE, Jeb Binkley

    2006-03-30T23:59:59.000Z

    Time-to-digital converters with sub-picosecond resolutions are needed to satisfy the requirements of time-on-flight measurements of the next generation of high energy and nuclear physics experiments. The converters must be highly integrated, power effective, low cost, and feature plug-and-play capabilities to handle the increasing number of channels (up to hundreds of millions) in future Department of Energy experiments. Current state-off-the-art time-to-digital converter integrated circuits do not have the sufficient degree of integration and flexibility to fulfill all the described requirements. During Phase I, the Advanced Science and Novel Technology Company in cooperation with the nuclear physics division of the Oak Ridge National Laboratory has developed the architecture of a novel time-to-digital converter with multiple channels connected to an external processor through a special interfacing block and synchronized by clock signals generated by an internal phase-locked loop. The critical blocks of the system including signal delay lines and delay-locked loops with proprietary differential delay cells, as well as the required digital code converter and the clock period counter have been designed and simulated using the advanced SiGe120 BiCMOS technological process. The results of investigations demonstrate a possibility to achieve the digitization accuracy within 1ps. ADSANTEC has demonstrated the feasibility of the proposed concept in computer simulations. The proposed system will be a critical component for the next generation of NEP experiments.

  13. Bluegrass State Getting Greener | Department of Energy

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

    water conservation measures and vending machine controllers. The controllers use infrared sensors to turn machines off during low-trafficked time periods without adversely...

  14. Doing the Time Warp: Queer Temporalities and Musical Theater

    E-Print Network [OSTI]

    Ellis, Sarah Taylor

    2013-01-01T23:59:59.000Z

    a sex comedy. 63 Yet the powerhouse 11 o’clock number, “Theadventure, dominated by the powerhouse performance of sweet

  15. Jitter Tracking Bandwidth Optimization Using Active-Inductor-Based Bandpass Filtering in High-speed Forwarded Clock Transceivers

    E-Print Network [OSTI]

    Liu, Yang

    2012-07-16T23:59:59.000Z

    po ns e(d B) 20 Equating equation (2.21) and (2.23), it can be approximated that g1827g3045 ? g2009g3030 g1827, (2.24) g2010g3045 ? g3436g2009g3013 + g2009g30092g2009g3030 g3440 g2010. (2.25) Equation (2.25) is established for small g.... The typical skew value for high speed forwarded clock system is 5 to 10 UI. Differential Jitter A data jitter sequence is given by g1836g3005 = g1836g3017 g1871g1861g1866 g34352g2024g1858g3037 g1847g1835 ? g1866g3439, (2.29) g1836g3017 is the peak...

  16. Pulse transmission receiver with higher-order time derivative pulse generator

    DOE Patents [OSTI]

    Dress Jr., William B.; Smith, Stephen F.

    2003-08-12T23:59:59.000Z

    Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission receiver includes: a front-end amplification/processing circuit; a synchronization circuit coupled to the front-end amplification/processing circuit; a clock coupled to the synchronization circuit; a trigger signal generator coupled to the clock; and at least one higher-order time derivative pulse generator coupled to the trigger signal generator. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.

  17. Sun Safety Is Made in the Shade Watch the clock. Avoid the sun as much as possible between 10:00 a.m. and 3:00 p.m.

    E-Print Network [OSTI]

    Sun Safety Is Made in the Shade Watch the clock. Avoid the sun as much as possible between 10:00 a.S. Department of Agriculture, and the County Commissioners Courts of Texas Cooperating Sun Safety Is Made in the Shade Watch the clock. Avoid the sun as much as possible between 10:00 a.m. and 3:00 p.m. Use sunblock

  18. Limits on the temporal variation of the fine structure constant, quark masses and strong interaction from quasar absorption spectra and atomic clock experiments

    E-Print Network [OSTI]

    V. V. Flambaum; D. B. Leinweber; A. W. Thomas; R. D. Young

    2004-02-10T23:59:59.000Z

    We perform calculations of the dependence of nuclear magnetic moments on quark masses and obtain limits on the variation of $(m_q/\\Lambda_{QCD})$ from recent measurements of hydrogen hyperfine (21 cm) and molecular rotational transitions in quasar absorption systems, atomic clock experiments with hyperfine transitions in H, Rb, Cs, Yb$^+$, Hg$^+$ and optical transition in Hg$^+$. Experiments with Cd$^+$, deuterium/hydrogen, molecular SF$_6$ and Zeeman transitions in $^3$He/Xe are also discussed.

  19. On the Scalability of Monitoring and Debugging Distributed Computations: Vector-Clock Size

    E-Print Network [OSTI]

    Waterloo, University of

    1: Sample POET Process-Time Diagram that provides such a display is POET [29, 18]. An example of a POET display, presenting a portion of a point-to-point broadcast, is shown in Figure 1. There is a significant limitation in POET and in any similar system. Such sys- tems are limited to displaying only

  20. On the Scalability of Monitoring and Debugging Distributed Computations: VectorClock Size

    E-Print Network [OSTI]

    Ward, Paul A.S.

    1: Sample POET Process­Time Diagram that provides such a display is POET [29, 18]. An example of a POET display, presenting a portion of a point­to­point broadcast, is shown in Figure 1. There is a significant limitation in POET and in any similar system. Such sys­ tems are limited to displaying only

  1. Noisy clocks and silent sunrises: measurement methods of daily activity pattern

    E-Print Network [OSTI]

    Courchamp, Franck

    intensity or ambient temperature and thus of the sun's position in the sky: time of sunrise, zenith; distribution of activity. Correspondence Pierre Nouvellet. Current address: Biology and Environmental Science with the actual position of the sun. To demonstrate the important difference between these methods of analysis, we

  2. A New Rb Lamp Exciter Circuit for Rb atomic clocks and Studies on Transition from Ring to Red mode

    E-Print Network [OSTI]

    Savita Singh; Bikash Ghosal; G M Saxena

    2010-11-10T23:59:59.000Z

    In this paper we describe the development of novel RF exciter circuit for electrode less Rb lamp. The lamp exciter circuit is a RF oscillator with a a new configuration operating at 60 to 65 MHz frequency with 3 to 4 watt power. The Rb lamp is used in exciting the ground state hyperfine transitions in Rb atom in a glass cell placed inside a tuned microwave cavity, As the frequency of these hyperfine transitions is very stable it is used in the development of Rb atomic clock by phase locking the oven controlled crystal oscillator (OCXO) to this atomic transition frequency. The details of the Rb lamp exciter are presented in the paper.The Lamp is ideally operated in ring mode as in this mode the linewidth is narrow and there is no self reversal. However, high temperature and RF excitation power may drive the Rb lamp to red mode which gives rise to line broadening and self reversal. It is the experience that mode change from ring to red deteriorates the atomic signal strength and S/N. In this paper the reasons of mode change are also discussed.

  3. Nova DAQ, System Architecture, Data Combiner and Timing System

    SciTech Connect (OSTI)

    Biery, K.A.; Cooper, R.G.; Foulkes, S.C.; Guglielmo, G.M.; Haynes, B.W.; Kwarciany, R.; Pavlicek, F.V.; Piccoli, L.P.; Votava, M.E.V.; /Fermilab

    2007-04-01T23:59:59.000Z

    NOvA (E929) is a long baseline experiment that will search for neutrino oscillations. There will be one detector near the beam source at Fermilab, and one detector in northern Minnesota. The DAQ system for the far detector collects over-threshold hits from over 450,000 channels of scintillator readouts, sorts the time-stamped data packets and archives selected time periods of data for transmission and processing. While a simple point-to-point protocol is used for the first level of data collection, Ethernet was chosen as the fabric for the rest of the DAQ. The packet time-stamp and overall system synchronization is based on two common-view GPS trained clock oscillators, one at each site. The present design cost-effectively satisfies the experiment's moderate speed and data volume requirements.

  4. Entropic Time

    SciTech Connect (OSTI)

    Caticha, Ariel [Department of Physics, University at Albany-SUNY, Albany, NY 12222 (United States)

    2011-03-14T23:59:59.000Z

    The formulation of quantum mechanics within the framework of entropic dynamics includes several new elements. In this paper we concentrate on one of them: the implications for the theory of time. Entropic time is introduced as a book-keeping device to keep track of the accumulation of changes. One new feature is that, unlike other concepts of time appearing in the so-called fundamental laws of physics, entropic time incorporates a natural distinction between past and future.

  5. Milk Advertising, Vending Machine Purchases, and Their Health Implications

    E-Print Network [OSTI]

    Gvillo, Rejeana

    2014-07-24T23:59:59.000Z

    milk types, differentiated by milk fat percentage. Advertising strategies focus on generic fluid milk consumption rather than specific fluid milk types. Understanding how generic milk advertising affects specific milk type consumption is necessary...

  6. List of Vending Machine Controls Incentives | 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 Home5b9fcbce19 No revision hasInformation Earth's Heat JumpInc Place:KeystoneSolarList ofPassiveMachine Controls Incentives Jump

  7. Product Standards for Vending Equipment (Japan) | 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 Home5b9fcbce19 No revision hasInformation Earth'sOklahoma/GeothermalOrangePeru:JobInformationInformation

  8. e+e- Pairs: a clock and a thermometer of heavy ion collisions

    E-Print Network [OSTI]

    Alberica Toia

    2008-05-01T23:59:59.000Z

    Recently, there is growing evidence that a new state of matter is formed in sqrt(s_NN)= 200 GeV Au+Au collisions at RHIC: a strongly coupled Quark Gluon Plasma of partonic degrees of freedom which develops a collective motion. Dilepton spectra are not affected by strong interaction and can therefore probe the whole time evolution of the collision. Thus they may be sensitive to onset of deconfinement, chiral symmetry restoration, as well as the production of thermal photons. The PHENIX experiment measured the production of e+e- pairs in p+p and Au+Au collisions at sqrt(s_NN)= 200 GeV. An enhanced dilepton yield in the mass range 150

  9. Accessories Around the Clock.

    E-Print Network [OSTI]

    Boyles, Rheba Merle; Hard, Graham; Roberson, Nena; Eaton, Fannie Brown

    1958-01-01T23:59:59.000Z

    . For this % smartly dressed persen selects accesrories in scale with her size. A large, hmvy-looking purse or hut does not kmpliment the small, dainty pars&. Tke tiny hat with dktinty trimming is net beccrming t~ a largp person. (See propottion.) k-p~oin, neutral... FOR LOOKING SMART ~ssories prove costly if they are good for Choose ucce y one or two wearings. You will choose re wisely if you heed these fashion hints: x~ensive accessories, such as hats, shoes handbags usually should be the same lot of irmffkfb...

  10. Prototype of time digitizing system for BESIII endcap TOF upgrade

    E-Print Network [OSTI]

    Cao Ping; Sun Wei-Jia; Ji Xiao-Lu; Fan Huan-Huan; Wang Si-Yu; Liu Shu-Bin; An Qi

    2013-05-30T23:59:59.000Z

    The prototype of time digitizing system for the upgrade of BESIII endcap TOF (ETOF) is introduced in this paper. The ETOF readout electronics has a formation of distributed architecture that hit signal from multi-gap resistive plate chamber (MRPC) is signaled as LVDS by front-end electronics (FEE) and sent to the back-end time digitizing system via long shield differential twisted pair cables. The ETOF digitizing system consists of 2 VME crates each of which contains modules of time digitizing, clock, trigger and fast control etc. The time digitizing module (TDIG) of this prototype can support up to 72 electrical channels of hit information measurement. The fast control (FCTL) module can operate at barrel or endcap mode. The barrel FCTL fans fast control signals from the trigger system out to endcap FCTLs, merges data from endcaps and transfers to the trigger system. Without modifying the barrel TOF structure, this time digitizing architecture benefits for improving ETOF performance without degrading barrel TOF measuring. Lab experiments show that the time resolution of this digitizing system can be less than 20ps, and the data throughput to DAQ can be about 92Mbps. Beam experiments show that the complete time resolution can be less than 45ps.

  11. Female Team Overall Name Age Rank Time Rank Time Rank Time Pace Rank Time Rank Time Pace Time

    E-Print Network [OSTI]

    Suzuki, Masatsugu

    Female Team Overall Name Age Rank Time Rank Time Rank Time Pace Rank Time Rank Time Pace Time 1 Amy:56:27.6 Deborah Mc Eligot Deborah Storrings Male Team Overall Name Age Rank Time Rank Time Rank Time Pace Rank Time Rank Time Pace Time 1 Macon Fessenden 20 1 5:42.2 2 0:26.9 1 34:29.7 3:23 1 0:12.8 1 17:41.1 3

  12. Time Off

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmittedStatus TomAboutManusScienceThe43068G. ThundatSmallDepartment ofTimTime

  13. Primary and reciprocal space-time experiments, relativistic reciprocity relations and Einstein's train-embankment thought experiment

    E-Print Network [OSTI]

    J. H. Field

    2011-11-11T23:59:59.000Z

    The concepts of primary and reciprocal experiments and base and travelling frames in special relativity are concisely described and applied to several different space-time experiments. These include Einstein's train/embankment thought experiment and a related thought experiment, due to Sartori, involving two trains in parallel motion with different speeds. Spatially separated clocks which are synchronised in their common proper frame are shown to be so in all inertial frames and their spatial separation to be Lorentz invariant. The interpretions given by Einstein and Sartori of their experiments, as well as those given by the present author in previous papers, are shown to be erroneous.

  14. Modeling highway travel time distribution with conditional probability models

    SciTech Connect (OSTI)

    Oliveira Neto, Francisco Moraes [ORNL] [ORNL; Chin, Shih-Miao [ORNL] [ORNL; Hwang, Ho-Ling [ORNL] [ORNL; Han, Lee [University of Tennessee, Knoxville (UTK)] [University of Tennessee, Knoxville (UTK)

    2014-01-01T23:59:59.000Z

    ABSTRACT Under the sponsorship of the Federal Highway Administration's Office of Freight Management and Operations, the American Transportation Research Institute (ATRI) has developed performance measures through the Freight Performance Measures (FPM) initiative. Under this program, travel speed information is derived from data collected using wireless based global positioning systems. These telemetric data systems are subscribed and used by trucking industry as an operations management tool. More than one telemetric operator submits their data dumps to ATRI on a regular basis. Each data transmission contains truck location, its travel time, and a clock time/date stamp. Data from the FPM program provides a unique opportunity for studying the upstream-downstream speed distributions at different locations, as well as different time of the day and day of the week. This research is focused on the stochastic nature of successive link travel speed data on the continental United States Interstates network. Specifically, a method to estimate route probability distributions of travel time is proposed. This method uses the concepts of convolution of probability distributions and bivariate, link-to-link, conditional probability to estimate the expected distributions for the route travel time. Major contribution of this study is the consideration of speed correlation between upstream and downstream contiguous Interstate segments through conditional probability. The established conditional probability distributions, between successive segments, can be used to provide travel time reliability measures. This study also suggests an adaptive method for calculating and updating route travel time distribution as new data or information is added. This methodology can be useful to estimate performance measures as required by the recent Moving Ahead for Progress in the 21st Century Act (MAP 21).

  15. A 96-channel FPGA-based time-to-digital converter

    SciTech Connect (OSTI)

    Bogdan, Mircea; Frisch, Henry; Heintz, Mary; Paramonov, Alexander; Sanders, Harold [Chicago U., EFI; Chappa, Steve; DeMaat, Robert; Klein, Rod; Miao, Ting; Phillips, Thomas J [Duke U.; Wilson, Peter [Fermilab

    2005-02-01T23:59:59.000Z

    We describe an FPGA-based, 96-channel, time-to-digital converter (TDC) intended for use with the Central Outer Tracker (COT) [1] in the CDF Experiment [2] at the Fermilab Tevatron. The COT system is digitized and read out by 315 TDC cards, each serving 96 wires of the chamber. The TDC is physically configured as a 9U VME card. The functionality is almost entirely programmed in firmware in two Altera Stratix FPGA’s. The special capabilities of this device are the availability of 840 MHz LVDS inputs, multiple phase-locked clock modules, and abundant memory. The TDC system operates with an input resolution of 1.2 ns, a minimum input pulse width of 4.8 ns and a minimum separation of 4.8 ns between pulses. Each input can accept up to 7 hits per collision. The time-to-digital conversion is done by first sampling each of the 96 inputs in 1.2-ns bins and filling a circular memory; the memory addresses of logical transitions (edges) in the input data are then translated into the time of arrival and width of the COT pulses. Memory pipelines with a depth of 5.5 ?s allow deadtime-less operation in the first-level trigger; the data are multiple-buffered to diminish deadtime in the second-level trigger. The complete process of edge-detection and filling of buffers for readout takes 12 ?s. The TDC VME interface allows a 64-bit Chain Block Transfer of multiple boards in a crate with transfer-rates up to 47 Mbytes/sec. The TDC also contains a separately-programmed data path that produces prompt trigger data every Tevatron crossing. The trigger bits are clocked onto the P3 VME backplane connector with a 22-ns clock for transmission to the trigger. The full TDC design and multi-card test results are described. The physical simplicity ensures low-maintenance; the functionality being in firmware allows reprogramming for other applications.

  16. Stanford Center for Position, Navigation and Time

    E-Print Network [OSTI]

    Straight, Aaron

    --ACES: Atomic Clock Ensemble in Space Bryant Walker Smith--Legal Aspects of Vehicle Automation Michael O Collision Avoidance System (ACAS X)" 15 9:30am 30 Beiker, Sven Stanford CARS "Automated vehicles are coming "Legal aspects of Vehicle Automation" 17 11:00am 30 Shaw, Stuart Lockheed Martin "GPS III Signal

  17. DARPA looks beyond GPS for positioning, navigating, and timing

    SciTech Connect (OSTI)

    Kramer, David

    2014-10-01T23:59:59.000Z

    Cold-atom interferometry, microelectromechanical systems, signals of opportunity, and atomic clocks are some of the technologies the defense agency is pursuing to provide precise navigation when GPS is unavailable.

  18. A 3rd-order Continuous-Time Low-Pass Sigma-Delta Analog-to-Digital Converter for Wideband Applications

    E-Print Network [OSTI]

    Kim, Kun Mo

    2011-08-08T23:59:59.000Z

    low-power system while it does not necessarily require dynamic element matching (DEM) devices. The CMOS technology is dominantly used for most of wideband ?? ADCs, while the SiG technology is used to achieve ultra-wide bandwidth (? 20 MHz) or very... high clock frequency (? 1 GHz). The SiGe technology, however consumes more power than the CMOS technology does. This work, the 3rd-order continuous-time low-pass ?? modulator, is compared with the previously published works to observe which aspects...

  19. Precision Timed Machines

    E-Print Network [OSTI]

    Liu, Isaac Suyu

    2012-01-01T23:59:59.000Z

    1.4 Precision Timed Machines . . . . .Precision Timed Machine 2.1precision timed (PRET) machine. pages 264–265, June 2007. [

  20. Shape Waves in 2D Josephson Junctions: Exact Solutions and Time Dilation

    SciTech Connect (OSTI)

    Gulevich, D. R.; Savel'ev, Sergey [Physics Department, Loughborough University, Leicestershire, LE11 3TU (United Kingdom); Advanced Science Institute, Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama, 351-0198 (Japan); Kusmartsev, F. V. [Physics Department, Loughborough University, Leicestershire, LE11 3TU (United Kingdom); Yampol'skii, V. A. [Advanced Science Institute, Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama, 351-0198 (Japan); Usikov Institute for Radiophysics and Electronics, Ukrainian Academy of Science, 61085 Kharkov (Ukraine); Nori, Franco [Advanced Science Institute, Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama, 351-0198 (Japan); MCTP, Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States)

    2008-09-19T23:59:59.000Z

    We predict a new class of excitations propagating along a Josephson vortex in two-dimensional Josephson junctions. These excitations are associated with the distortion of a Josephson vortex line and have an analogy with shear waves in solid mechanics. Their shapes can have an arbitrary profile, which is retained when propagating. We derive a universal analytical expression for the energy of arbitrary shape excitations, investigate their influence on the dynamics of a vortex line, and discuss conditions where such excitations can be created. Finally, we show that such excitations play the role of a clock for a relativistically moving Josephson vortex and suggest an experiment to measure a time dilation effect analogous to that in special relativity.

  1. General Items o Alarm clock

    E-Print Network [OSTI]

    Saidak, Filip

    . standardsforliving.com o Refrigerators (3.5 cubic feet or smaller) o Stereo w/Headphones o Television, VCR o Explosives/Fireworks o Extension Cords (any type) o Fog/Smoke Machines o Freezers o Furniture

  2. Clocking the Early Universe's Expansion

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to User Group and Userof aChristinaCliff joinsClimate, Ocean and Sea

  3. Master Clock in Laser Room

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas Conchas recovery challenge fund LasDubey selected asMaratMarySingle Particle422

  4. Intensities for the Four Largest Shocks of the New Madrid Earthquake Sequence

    E-Print Network [OSTI]

    Agnew, Duncan C

    2011-01-01T23:59:59.000Z

    structures; widespread cracking; sunk ground; time inferredbreakage of tree limbs; sunk ground; widespread bank caving.Clocks affected? (s/-): k: sunk ground s: clocks start or

  5. The ELIMINATOR ^^^ ^^^^^^^^^^ NEW !!!!! Multi I/O Card for the ...

    E-Print Network [OSTI]

    ... DS1287 CMOS real time clock/calendar - built in battery backup (10 years in the absence of power) - 100 year clock (automatically compensates for leap year)

  6. The time as an emergent property of quantum mechanics, a synthetic description of a first experimental approach

    E-Print Network [OSTI]

    E Moreva; G Brida; M Gramegna; V Giovannetti; L Maccone; M Genovese

    2015-02-11T23:59:59.000Z

    The "problem of time" in present physics substantially consists in the fact that a straightforward quantization of the general relativistic evolution equation and constraints generates for the Universe wave function the Wheeler-De Witt equation, which describes a static Universe. Page and Wootters considered the fact that there exist states of a system composed by entangled subsystems that are stationary, but one can interpret the component subsystems as evolving: this leads them to suppose that the global state of the universe can be envisaged as one of this static entangled state, whereas the state of the subsystems can evolve. Here we synthetically present an experiment, based on PDC polarization entangled photons, that allows showing with a practical example a situation where this idea works, i.e. a subsystem of an entangled state works as a "clock" of another subsystem.

  7. Noncommutative Two Time Physics

    E-Print Network [OSTI]

    W. Chagas-Filho

    2006-04-03T23:59:59.000Z

    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.

  8. Asia Times -Search Asia

    E-Print Network [OSTI]

    Asia Times - Search Asia Times Advanced Search Southeast Asia Scapegoats for Indonesia's timber://www.atimes.com/atimes/Southeast_Asia/EI19Ae01.html (1 of 4)9/4/2007 3:01:50 PM Search #12;Asia Times - rather than on the nationwide band

  9. Asia Times -Search Asia

    E-Print Network [OSTI]

    Asia Times - Search Asia Times Advanced Search Southeast Asia Scapegoats for Indonesia's timber://www.atimes.com/atimes/Southeast_Asia/EI19Ae01.html (1 of 4)9/4/2007 12:55:07 PM Search #12;Asia Times - rather than on the nationwide band

  10. The Microarchitecture of the LC-3b, Basic Machine

    E-Print Network [OSTI]

    Kim, Hyesoon

    a given clock cycle is completely determined by the 35 control signals, combined with seven bits of time. We say, "at each instant of time," but we really mean: during each clock cycle. That is, time is divided into clock cycles. The cycle time of a microprocessor is the duration of a clock cycle. A common

  11. Pixel array detector for time-resolved x-ray scattering

    SciTech Connect (OSTI)

    Rodricks, B.G. [Argonne National Lab., IL (United States); Barna, S.L.; Gruner, S.M.; Shepherd, J.A.; Tate, M.W.; Wixted, R.L. [Princeton Univ., NJ (United States). Dept. of Physics

    1996-01-01T23:59:59.000Z

    This paper describes the development of a large-area hybrid pixel detector designed for time-resolved synchrotron x-ray scattering experiments where limited frames, with a high framing rate, is required. The final design parameters call for a 1024{times}1O24 pixel array device with 150-micron pixels that is 100% quantum efficient for x-rays with energy up to 20 keV, with a framing rate in the microsecond range. The device will consist of a fully depleted diode array bump bonded to a CMOS electronic storage capacitor array with eight frames per pixel. The two devices may be separated by a x-ray blocking layer that protects the radiation-sensitive electronics layer from damage. The signal is integrated in the electronics layer and stored in one of eight CMOS capacitors. After eight frames are taken, the data are then read out, using clocking electronics external to the detector, and stored in a RAM disk. Results will be presented on the development of a prototype 4{times}4 pixel electronics layer that is capable of storing at least 10,000 12-keV x-ray photons for a capacity of over 50 million electrons with a noise corresponding to 2 x-ray photons per pixel. The diode detective layer, electronics storage layer along with the radiation damage and blocking layers will be discussed.

  12. Matter: Space without Time

    E-Print Network [OSTI]

    Yousef Ghazi-Tabatabai

    2012-11-19T23:59:59.000Z

    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.

  13. Intrinsic Time Quantum Geometrodynamics

    E-Print Network [OSTI]

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

    2015-02-06T23:59:59.000Z

    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.

  14. Intrinsic Time Quantum Geometrodynamics

    E-Print Network [OSTI]

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

    2015-01-26T23:59:59.000Z

    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 canonical commutation relations without Planck's constant emerges from the unification of Gravitation and Quantum Mechanics.

  15. On the Time Times Temperature Bound

    E-Print Network [OSTI]

    A. Lopez-Ortega

    2010-06-28T23:59:59.000Z

    Recently Hod proposes a lower bound on the relaxation time of a perturbed thermodynamic system. For gravitational systems this bound transforms into a condition on the fundamental quasinormal frequency. We test the bound in some spacetimes whose quasinormal frequencies are calculated exactly, as the three-dimensional BTZ black hole, the D-dimensional de Sitter spacetime, and the D-dimensional Nariai spacetime. We find that for some of these spacetimes their fundamental quasinormal frequencies do not satisfy the bound proposed by Hod.

  16. Time functions as utilities

    E-Print Network [OSTI]

    E. Minguzzi

    2009-09-04T23:59:59.000Z

    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.

  17. Is Time Inhomogeneous ?

    E-Print Network [OSTI]

    S. Davood Sadatian

    2014-05-08T23:59:59.000Z

    In this article, we discuss probability of inhomogeneous time in high or low energy scale of physics. Consequently, the possibility was investigated of using theories such as varying speed of light (VSL) and fractal mathematics to build a framework within which answers can be found to some of standard cosmological problems and physics theories on the basis of time non-homogeneity.

  18. Probabilistic time-series

    E-Print Network [OSTI]

    Roweis, Sam

    SCIA 2003 Tutorial: Hidden Markov Models Sam Roweis, University of Toronto June 29, 2003 Probabilistic Generative Models for Time Series #15; Stochastic models for time-series: y 1 ; y 2 ; : : : ; y #15; Add noise to make the system stochastic: p(y t jy t 1 ;y t 2 ; : : : ;y t k ) #15; Markov models

  19. TIMELY WARNING CAMPUS ALERT

    E-Print Network [OSTI]

    Hardy, Christopher R.

    TIMELY WARNING CAMPUS ALERT 13 September 2007 This communication is prepared as part of the Timely of 1990. This federal law requires a general communication to the campus community of all crimes reported. Consider carefully whether your presence at or near the Lancaster Green Apartments while unaccompanied

  20. Water quality and business aspects of sachet-vended water in Tamale, Ghana .

    E-Print Network [OSTI]

    Okioga, Teshamulwa (Teshamulwa Irene)

    2007-01-01T23:59:59.000Z

    ??Microbial water quality analyses were conducted on 15 samples of factory-produced sachet water and 15 samples of hand-tied sachet water, sold in Tamale, Ghana. The… (more)

  1. Illegibility, Uncertainty and the Management of Street Vending in New York City

    E-Print Network [OSTI]

    Devlin, Ryan

    2006-01-01T23:59:59.000Z

    imperatives of the “new public management” necessitated theexample of the “new public management”. Fiscal austerity and

  2. Illegibility, Uncertainty and the Management of Street Vending in New York City

    E-Print Network [OSTI]

    Devlin, Ryan

    2006-01-01T23:59:59.000Z

    Manhattan’s 14th Street Vendors Market: An Analysis of thecity government and street vendors over the right to andinterests still view street vendors as a nuisance, vendors

  3. Informal Urbanism: Legal Ambiguity, Uncertainty, and the Management of Street Vending in New York City

    E-Print Network [OSTI]

    Devlin, Ryan Thomas

    2010-01-01T23:59:59.000Z

    Another Raid on the Vendors: Dr. Edson Captures Several Tonslawyer representing food vendors. Transcript of New Yorkcontrol, general merchandise vendors comfortably violate the

  4. Water quality and business aspects of sachet-vended water in Tamale, Ghana

    E-Print Network [OSTI]

    Okioga, Teshamulwa (Teshamulwa Irene)

    2007-01-01T23:59:59.000Z

    Microbial water quality analyses were conducted on 15 samples of factory-produced sachet water and 15 samples of hand-tied sachet water, sold in Tamale, Ghana. The tests included the membrane filtration (MF) test using ...

  5. E-Print Network 3.0 - automatic vending machine Sample Search...

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

    in 215 BC. That machine was used... to dispense holy water used in the temples of Egypt. Today, a drinking water ... Source: National Institute of Standards and Technology...

  6. Time of day modulates low-temperature Ca2+ Arabidopsis

    E-Print Network [OSTI]

    Haseloff, Jim

    -induced increases in cytosolic-free calcium ([Ca2ĂŸ ]cyt), and regulation of [Ca2ĂŸ ]cyt-dependent outputs of the LT: circadian, calcium, cold, guard cell, signalling. Introduction Circadian clocks synchronize plant physiology). Circadian control is believed to derive from several interlocking and autoinhibitory loops of gene

  7. NORTHWESTERN UNIVERSITY Timing Analysis and Optimization Techniques for VLSI Circuits

    E-Print Network [OSTI]

    Zhou, Hai

    OF PHILOSOPHY Field of Electrical and Computer Engineering By Ruiming Chen EVANSTON, ILLINOIS December 2007 #12 clocking in latch-based designs is proposed, where the central problem is to compute the probability of having a positive cycle in a graph with random edge weights. In our third work, we consider the changes

  8. Environment Induced Time Arrow

    E-Print Network [OSTI]

    Janos Polonyi

    2012-06-25T23:59:59.000Z

    The spread of the time arrows from the environment to an observed subsystem is followed within a harmonic model. A similarity is pointed out between irreversibility and a phase with spontaneously broken symmetry. The causal structure of interaction might be lost in the irreversible case, as well. The Closed Time Path formalism is developed for classical systems and shown to handle the time arrow problem in a clear and flexible manner. The quantum case is considered, as well, and the common origin of irreversibility and decoherence is pointed out.

  9. Method and system for selecting data sampling phase for self timed interface logic

    DOE Patents [OSTI]

    Hoke, Joseph Michael; Ferraiolo, Frank D.; Lo, Tin-Chee; Yarolin, John Michael

    2005-01-04T23:59:59.000Z

    An exemplary embodiment of the present invention is a method for transmitting data among processors over a plurality of parallel data lines and a clock signal line. A receiver processor receives both data and a clock signal from a sender processor. At the receiver processor a bit of the data is phased aligned with the transmitted clock signal. The phase aligning includes selecting a data phase from a plurality of data phases in a delay chain and then adjusting the selected data phase to compensate for a round-off error. Additional embodiments include a system and storage medium for transmitting data among processors over a plurality of parallel data lines and a clock signal line.

  10. Time, energy & form

    E-Print Network [OSTI]

    McInnis, Martha Jane

    1982-01-01T23:59:59.000Z

    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 ...

  11. Drug Retention Times

    SciTech Connect (OSTI)

    Center for Human Reliability Studies

    2007-05-01T23:59:59.000Z

    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

  12. Drug Retention Times

    SciTech Connect (OSTI)

    Center for Human Reliability Studies

    2007-05-01T23:59:59.000Z

    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.

  13. Decoherence and time emergence

    E-Print Network [OSTI]

    A. Camacho

    1998-07-30T23:59:59.000Z

    In this work the possible role that Decoherence Model could play in the emergence of the classical concept of time is analyzed. We take the case of a Mixmaster universe with small anisotropy and construct its Halliwell propagator. Afterwards we introduce in our system terms that comprise the effects of Decoherence Model. This is done by means of the so called Restricted Path Integral Formalism. We obtain Halliwell's modified propagator and find that a gauge invariant physical time emerges as consequence of this process.

  14. Time reversal communication system

    DOE Patents [OSTI]

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

    2008-12-02T23:59:59.000Z

    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.

  15. Time and Attendance Reporting

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

    2004-10-22T23:59:59.000Z

    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.

  16. Fuzzy Space-Time

    E-Print Network [OSTI]

    J. Madore

    1996-07-26T23:59:59.000Z

    A review is made of recent efforts to define linear connections and their corresponding curvature within the context of noncommutative geometry. As an application it is suggested that it is possible to identify the gravitational field as a phenomenological manifestation of space-time commutation relations and to thereby clarify its role as an ultraviolet regularizer.

  17. Time-Encoded Imagers.

    SciTech Connect (OSTI)

    Marleau, Peter; Brubaker, Erik

    2014-11-01T23:59:59.000Z

    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.

  18. STOPPING TIMES IN QUANTUM MECHANICS

    E-Print Network [OSTI]

    Attal, Stéphane

    (Stinespring, Kraus). 3". Time-dependant case General time evolution of an open quantum sys- tem = (Pt)t0

  19. Rick Grush Brain time and phenomenological time (draft) Page 1/37 Brain time and phenomenological time

    E-Print Network [OSTI]

    Grush, Rick

    Rick Grush Brain time and phenomenological time (draft) Page 1/37 Brain time and phenomenological "forthwith" in a common structure. - Edmund Husserl, Phenomenology of Inner Time Consciousness1 1 time and phenomenological time (draft) Page 2/37 information-processing structure that accounts

  20. Space time and rotations

    E-Print Network [OSTI]

    A. Tartaglia

    2002-01-04T23:59:59.000Z

    The paper considers the problem of finding the metric of space time around a rotating, weakly gravitating body. Both external and internal metric tensors are consistently found, together with an appropriate source tensor. All tensors are calculated at the lowest meaningful approximation in a power series. The two physical parameters entering the equations (the mass and the angular momentum per unit mass) are assumed to be such that the mass effects are negligible with respect to the rotation effects. A non zero Riemann tensor is obtained. The order of magnitude of the effects at the laboratory scale is such as to allow for experimental verification of the theory.

  1. 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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearchScheduled System BurstLong TermScience&Time-Resolved

  2. HAWC Timing Calibration

    E-Print Network [OSTI]

    Huentemeyer, Petra; Dingus, Brenda

    2009-01-01T23:59:59.000Z

    The High-Altitude Water Cherenkov (HAWC) Experiment is a second-generation highsensitivity gamma-ray and cosmic-ray detector that builds on the experience and technology of the Milagro observatory. Like Milagro, HAWC utilizes the water Cherenkov technique to measure extensive air showers. Instead of a pond filled with water (as in Milagro) an array of closely packed water tanks is used. The event direction will be reconstructed using the times when the PMTs in each tank are triggered. Therefore, the timing calibration will be crucial for reaching an angular resolution as low as 0.25 degrees.We propose to use a laser calibration system, patterned after the calibration system in Milagro. Like Milagro, the HAWC optical calibration system will use ~1 ns laser light pulses. Unlike Milagro, the PMTs are optically isolated and require their own optical fiber calibration. For HAWC the laser light pulses will be directed through a series of optical fan-outs and fibers to illuminate the PMTs in approximately one half o...

  3. Three-photon energy-time entanglement

    E-Print Network [OSTI]

    Shalm, Lynden K; Yan, Zhizhong; Simon, Christoph; Resch, Kevin J; Jennewein, Thomas

    2012-01-01T23:59:59.000Z

    Entangled quantum particles have correlations stronger than those allowed by classical physics. These correlations are the focus of of the deepest issues in quantum mechanics [1-3] and are the basis of many quantum technologies. The entanglement of discrete particle properties has been studied extensively in the context of quantum computing [4], cryptography [5], and quantum repeaters [6] while entanglement between the continuous properties of particles may play a critical role in improving the sensitivity of gravitational wave detectors [7,8], atomic clocks [9], and other high precision instruments. The attributes of three or more entangled particles are fundamentally different from those of two entangled particles [10-14]. While the discrete variables of up to 14 ions [15] and the continuous variables between three intense optical beams [16, 17] have been entangled, it has remained an open challenge to entangle the continuous properties of more than two individual particles. Here we experimentally demonstra...

  4. 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.

    1985-05-21T23:59:59.000Z

    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.

  5. Time encoded radiation imaging

    DOE Patents [OSTI]

    Marleau, Peter; Brubaker, Erik; Kiff, Scott

    2014-10-21T23:59:59.000Z

    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.

  6. Deciding Timed Bisimulation for Timed Automata Using Zone Valuation Graph

    E-Print Network [OSTI]

    Prasad, Sanjiva

    Deciding Timed Bisimulation for Timed Automata Using Zone Valuation Graph Shibashis Guha, Chinmay was first proved to be decidable for timed automata by Cerans using a product construction method on region graph. Several other methods have been proposed in the literature since then for decid- ing timed

  7. Detecting internal corrosion of natural gas transmission pipelines: field tests of probes and systems for real-time corrosion measurement

    SciTech Connect (OSTI)

    Covino, Bernard S., Jr.; Bullard, Sophie J.; Cramer, Stephen D.; Holcomb, Gordon R.; Ziomek-Moroz, M.; Kane, R.D. (InterCorr International); Meidinger, B. (Rocky Mountain Oilfield Testing Center)

    2005-01-01T23:59:59.000Z

    A field study was conducted to evaluate the use of automated, multi-technique electrochemical corrosion-rate monitoring devices and probes for detecting corrosion in environments similar to those found in natural gas transmission pipelines. It involved measurement of real-time corrosion signals from operating pipelines. Results and interpretation were reported from four different field test locations. Standard flush-mount and custom flange probes were used in four different environments at a gas-gathering site and one environment but two different probe orientations at a natural gas site. These sites were selected to represent normal and upset conditions common in gas transmission pipelines. The environments consisted of two different levels of humidified natural gas, liquid hydrocarbon, and water from natural gas. Probe locations included the 6 and 12 o?clock positions of a natural gas pipeline carrying 2-phase gas/liquid flow. The probe data was monitored using completely remote solar powered systems that provided real-time data transmission via wireless back to a pipeline control station. Data are also presented comparing the ECR probe data to that for coupons used to determine corrosion rate and to detect the presence of microbiologically influenced corrosion (MIC).

  8. SLH Timing Belt Powertrain

    SciTech Connect (OSTI)

    Schneider, Abe

    2014-04-09T23:59:59.000Z

    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.

  9. First-passage-time problems in time-aware networks

    E-Print Network [OSTI]

    Suwansantisuk, Watcharapan, 1978-

    2012-01-01T23:59:59.000Z

    First passage time or the first time that a stochastic process crosses a boundary is a random variable whose probability distribution is sought in engineering, statistics, finance, and other disciplines. The probability ...

  10. Turbo Space-Time Codes with Time Varying Linear Transformations

    E-Print Network [OSTI]

    Haimovich, Alexander

    1 Turbo Space-Time Codes with Time Varying Linear Transformations Hangjun Chen and Alexander 07102 Email: {hangjun.chen; alexander.m.haimovich}@njit.edu Abstract Turbo space-time codes with symbols in this paper. It is shown that turbo codes with TVLT achieve full diversity gain and do not require exhaustive

  11. Modern theories of discrete time

    E-Print Network [OSTI]

    M. Lorente

    2003-12-31T23:59:59.000Z

    We review some modern theories about the structure of space and time, in particular those related to discrete space and time. Following an epistemological method we start from theories which discuss discrete space and time as a mathematical tool to solve physical models. Antother theories look for physical content of the discrete structure of space and time, based in relational theories of space and time which are derived from the relations of some fundamental entities. Finally we present some philosophical positions who try to find the ontological foundation of the relational theories os space and time.

  12. Time machines and quantum theory

    E-Print Network [OSTI]

    Mark J Hadley

    2006-12-02T23:59:59.000Z

    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.

  13. Clock tree synthesis for prescribed skew specifications

    E-Print Network [OSTI]

    Chaturvedi, Rishi

    2005-08-29T23:59:59.000Z

    for prescribed skew targets. The interactions among skew targets, sink location proximities and capacitive load balance are analyzed. Based on this analysis, a maximum delay-target ordering merging scheme is suggested to minimize wire and bu?er area, which...

  14. Tight Bounds for Clock Synchronization [Extended Abstract

    E-Print Network [OSTI]

    O'Donnell, Ryan

    and Networks Laboratory (TIK) ETH Zurich, 8092 Zurich, Switzerland lenzen@tik.ee.ethz.ch Thomas Locher Computer Engineering and Networks Laboratory (TIK) ETH Zurich, 8092 Zurich, Switzerland lochert@tik.ee.ethz.ch Roger Wattenhofer Computer Engineering and Networks Laboratory (TIK) ETH Zurich, 8092 Zurich, Switzerland

  15. Central Activator Keeps the Circadian Clock Ticking

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to User Group and User Executive

  16. Central Activator Keeps the Circadian Clock Ticking

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to User Group and User ExecutiveCentral Activator Keeps the Circadian

  17. Central Activator Keeps the Circadian Clock Ticking

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New Substation SitesStanding Friedel Waves,TheoryParliament' | ArgonneCentersCentral

  18. Central Activator Keeps the Circadian Clock Ticking

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New Substation SitesStanding Friedel Waves,TheoryParliament' |

  19. Central Activator Keeps the Circadian Clock Ticking

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New Substation SitesStanding Friedel Waves,TheoryParliament' |Central Activator Keeps

  20. Central Activator Keeps the Circadian Clock Ticking

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New Substation SitesStanding Friedel Waves,TheoryParliament' |Central Activator

  1. Central Activator Keeps the Circadian Clock Ticking

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New Substation SitesStanding Friedel Waves,TheoryParliament' |Central

  2. Central Activator Keeps the Circadian Clock Ticking

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

    work, has been associated with an increased occurrence of obesity, depression, diabetes, certain cancers, addiction, and other health issues. Current treatment often focuses...

  3. Reactor control rod timing system

    SciTech Connect (OSTI)

    Wu, P.T.

    1982-02-09T23:59:59.000Z

    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.

  4. Reactor control rod timing system

    DOE Patents [OSTI]

    Wu, Peter T. K. (Clifton Park, NY)

    1982-01-01T23:59:59.000Z

    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.

  5. IT'S ABOUT TIME Characteristic times in biogeochemistry and climate

    E-Print Network [OSTI]

    Schwartz, Stephen E.

    , and then It falls to earth: Can you tell me when? Decision making on energy and climate change #12;Impulse responseIT'S ABOUT TIME Characteristic times in biogeochemistry and climate Stephen E. Schwartz Symposium on biogeochemical cycling and climate In honor of Henning Rodhe on the occasion of his retirement from the chair

  6. Real-Time Control with Parametric Timed Reachability Games

    E-Print Network [OSTI]

    Boyer, Edmond

    for which the existence of a parameter valuation, such that there is a strategy for the controller to reach set of parameter valuations. Keywords: Timed automata, game theory, parameters, control, verification, model-checking 1. INTRODUCTION Formal methods are widely used in the analysis of time critical systems

  7. Subsystem real-time Time Dependent Density Functional Theory

    E-Print Network [OSTI]

    Krishtal, Alisa; Pavanello, Michele

    2015-01-01T23:59:59.000Z

    We present the extension of Frozen Density Embedding (FDE) theory to real-time Time Dependent Density Functional Theory (rt-TDDFT). FDE a is DFT-in-DFT embedding method that allows to partition a larger Kohn-Sham system into a set of smaller, coupled Kohn-Sham systems. Additional to the computational advantage, FDE provides physical insight into the properties of embedded systems and the coupling interactions between them. The extension to rt-TDDFT is done straightforwardly by evolving the Kohn-Sham subsystems in time simultaneously, while updating the embedding potential between the systems at every time step. Two main applications are presented: the explicit excitation energy transfer in real time between subsystems is demonstrated for the case of the Na$_4$ cluster and the effect of the embedding on optical spectra of coupled chromophores. In particular, the importance of including the full dynamic response in the embedding potential is demonstrated.

  8. Resource Allocation with Time Intervals

    E-Print Network [OSTI]

    2009-09-21T23:59:59.000Z

    Keywords: resource allocation, proper intervals, unsplittable flow ... be positioned within a larger time interval) and call admission control, see [4] and [8] for ...

  9. Deterministic mathematical modelling for cancer chronotherapeutics: cell population

    E-Print Network [OSTI]

    of circadian clock physiology to determine best infusion times within the 24-hour span for anticancer drug

  10. Electric Time in Quantum Cosmology

    E-Print Network [OSTI]

    Stephon Alexander; Martin Bojowald; Antonino Marciano; David Simpson

    2012-12-10T23:59:59.000Z

    Effective quantum cosmology is formulated with a realistic global internal time given by the electric vector potential. New possibilities for the quantum behavior of space-time are found, and the high-density regime is shown to be very sensitive to the specific form of state realized.

  11. 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

  12. Time for money? Prathap Haridoss

    E-Print Network [OSTI]

    Krishnapura, Nagendra

    Time for money? Prathap Haridoss "The more money you earn, the less time you will have to spend, you have to keep enquiring around. To get the maximum money that you possibly can get, you can't just `get a salary', you have to actively work towards increasing your income. Making money can be a full

  13. South Florida Bee College Vendor Application

    E-Print Network [OSTI]

    Jawitz, James W.

    South Florida Bee College Vendor Application Friday August 15th and Saturday August 16th 2014 UF 2014. Vendors will be notified of acceptance by July 14th 2014. Please note there is a 50$/day vending fee payable by check. Vendors will be assigned spots. Arrival time: 47pm Thurs 8/14 #12;

  14. 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 (TV perfect tolerance to packet loss and strong robustness against malicious attacks. The communication is found in current substation communication systems where critical messages related to transient faults (e

  15. Contacts of space--times

    SciTech Connect (OSTI)

    Maia, M.D.

    1981-03-01T23:59:59.000Z

    The concept of contact between manifolds is applied to space--times of general relativity. For a given background space--time a contact approximation of second order is defined and interpreted both from the point of view of a metric pertubation and of a higher order tangent manifold. In the first case, an application to the high frequency gravitational wave hypothesis is suggested. In the second case, a constant curvature tangent bundle is constructed and suggested as a means to define a ten parameter local space--time symmetry.

  16. Time Machine at the LHC

    E-Print Network [OSTI]

    I. Ya. Aref'eva; I. V. Volovich

    2007-10-15T23:59:59.000Z

    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.

  17. TIME-DEPENDENT MAXWELL'S EQUATIONS*

    E-Print Network [OSTI]

    Department of Mathematical Sciences, University of Delaware, Newark, Delaware 19716. (monklath.udel. ... The plan of the paperis as follows. In 2 we .... which states that the energy in the discrete system is independent of time. This energy ...

  18. Jaguar/Kraken time lapse

    SciTech Connect (OSTI)

    2009-11-17T23:59:59.000Z

    Time lapse video of the upgrade to ORNL's Jaguar and the University of Tennessee's Kraken, the world's fastest and third-fastest supercomputers. For more information, please visit www.nccs.gov.

  19. The Feynman-Y Statistic in Relation to Shift-Register Neutron Coincidence Counting: Precision and Dead Time

    SciTech Connect (OSTI)

    Croft, Stephen [Los Alamos National Laboratory; Santi, Peter A. [Los Alamos National Laboratory; Henzlova, Daniela [Los Alamos National Laboratory; Hauck, Danielle K. [Los Alamos National Laboratory; Favalli, Andrea [Los Alamos National Laboratory

    2012-07-13T23:59:59.000Z

    The Feynman-Y statistic is a type of autocorrelation analysis. It is defined as the excess variance-to-mean ratio, Y = VMR - 1, of the number count distribution formed by sampling a pulse train using a series of non-overlapping gates. It is a measure of the degree of correlation present on the pulse train with Y = 0 for Poisson data. In the context of neutron coincidence counting we show that the same information can be obtained from the accidentals histogram acquired using the multiplicity shift-register method, which is currently the common autocorrelation technique applied in nuclear safeguards. In the case of multiplicity shift register analysis however, overlapping gates, either triggered by the incoming pulse stream or by a periodic clock, are used. The overlap introduces additional covariance but does not alter the expectation values. In this paper we discuss, for a particular data set, the relative merit of the Feynman and shift-register methods in terms of both precision and dead time correction. Traditionally the Feynman approach is applied with a relatively long gate width compared to the dieaway time. The main reason for this is so that the gate utilization factor can be taken as unity rather than being treated as a system parameter to be determined at characterization/calibration. But because the random trigger interval gate utilization factor is slow to saturate this procedure requires a gate width many times the effective 1/e dieaway time. In the traditional approach this limits the number of gates that can be fitted into a given assay duration. We empirically show that much shorter gates, similar in width to those used in traditional shift register analysis can be used. Because the way in which the correlated information present on the pulse train is extracted is different for the moments based method of Feynman and the various shift register based approaches, the dead time losses are manifested differently for these two approaches. The resulting estimates for the dead time corrected first and second order reduced factorial moments should be independent of the method however and this allows the respective dead time formalism to be checked. We discuss how to make dead time corrections in both the shift register and the Feynman approaches.

  20. Reduction in maximum time uncertainty of paired time signals

    DOE Patents [OSTI]

    Theodosiou, G.E.; Dawson, J.W.

    1981-02-11T23:59:59.000Z

    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. UNDERGRAD FULL-TIME PART-TIME UNDERGRAD FULL-TIME PART-TIME Arts & Social Sciences 4706 1118 15 -19 3910 0

    E-Print Network [OSTI]

    -TIME UNDERGRAD FULL-TIME PART-TIME Year 1 3431 432 Tri-County area 7533 1474 Year 2 3012 406 Rest of Ontario 2929 GRADUATE FULL-TIME PART-TIME GRADUATE FULL-TIME PART-TIME Tri-County area 586 80 Spec & Cert 3 2 Rest

  2. The Broken Symmetry of Time

    SciTech Connect (OSTI)

    Kastner, Ruth E. [Department of Philosophy, University of Maryland, College Park, MD 20742 (United States)

    2011-11-29T23:59:59.000Z

    This paper seeks to clarify features of time asymmetry in terms of symmetry breaking. It is observed that, in general, a contingent situation or event requires the breaking of an underlying symmetry. The distinction between the universal anisotropy of temporal processes and the irreversibility of certain physical processes is clarified. It is also proposed that the Transactional Interpretation of quantum mechanics offers an effective way to explain general thermodynamic asymmetry in terms of the time asymmetry of radiation, where prior such efforts have fallen short.

  3. Noncommutative space-time models

    E-Print Network [OSTI]

    N. A. Gromov; V. V. Kuratov

    2005-07-01T23:59:59.000Z

    The FRT quantum Euclidean spaces $O_q^N$ are formulated in terms of Cartesian generators. The quantum analogs of N-dimensional Cayley-Klein spaces are obtained by contractions and analytical continuations. Noncommutative constant curvature spaces are introduced as a spheres in the quantum Cayley-Klein spaces. For N=5 part of them are interpreted as the noncommutative analogs of (1+3) space-time models. As a result the quantum (anti) de Sitter, Newton, Galilei kinematics with the fundamental length and the fundamental time are suggested.

  4. Time, Humans and Societal Challenges

    E-Print Network [OSTI]

    .y. Oldest fossil (Australia): 3.5 b.y Oldest rock (gneiss; Slave, N. Canada): 3.96 b.y Oldest mineral, so most growth there. Less-developed regions comprised 30% of global population in 1900, 80% in 2000,000 calories per day Estimated that raising US child consumes 15-20 times resources used in raising child

  5. Last Time... on the website

    E-Print Network [OSTI]

    Mohri, Mehryar

    will block until the command finishes netscape & #12;Complex Commands · The shell's power is in its abilityLast Time... on the website #12;Lecture 6 Shell Scripting #12;What is a shell? · The user interface programming language · A program like any other ­ This is why there are so many shells #12;Shell History

  6. Waste to Energy Time Activities

    E-Print Network [OSTI]

    SEMINAR Waste to Energy Time Activities 9:30-9:40 Brief introduction of participants 9:40-10:10 Presentation of Dr. Kalogirou, "Waste to Energy: An Integral Part of Worldwide Sustainable Waste Management" 10. Sofia Bethanis, "Production of synthetic aggregates for use in structural concrete from waste to energy

  7. The TESLA Time Projection Chamber

    E-Print Network [OSTI]

    Nabil Ghodbane

    2002-12-12T23:59:59.000Z

    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.

  8. TIME-RESOLVED VIBRATIONAL SPECTROSCOPY

    SciTech Connect (OSTI)

    Andrei Tokmakoff, MIT (Conference Chair) [Conference Chair; Paul Champion, Northeastern University; Edwin J. Heilweil, NIST; Keith A. Nelson, MIT; Larry Ziegler, Boston University

    2009-05-14T23:59:59.000Z

    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 DOEù��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 DOEù��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.

  9. Curricular internship Timing and Duration

    E-Print Network [OSTI]

    Krause, Rolf

    1 Art.1 Curricular internship Art.2 Objectives Art.3 Timing and Duration Art.4 Choice of Employer Art.5 Pertinence of the internship Art.6 Internship Search GRADUATE INTERNSHIP GUIDELINES Faculties training or work experience, herein referred to as `internship', is one of the graduation requirements. 2

  10. Time for State Bicycle Helmet

    E-Print Network [OSTI]

    Minnesota, University of

    Time for State Bicycle Helmet Legislation? ?? Jon Roesler, MS Ayo Adeniyi, MBBS, MPH Mark Kinde is the most bike- friendly city in the U.S. in Y2010 #12;#12;Minneapolis is #1 Bike City Bicycling.com list? · Bicycle helmets reduce head injuries and deaths by up to 85%* · If each rider wore a helmet one death per

  11. Steven E. Sayers Senior Assoc. Vice President

    E-Print Network [OSTI]

    Papautsky, Ian

    Violet Assoc. Director, Facilities & Operations Adrian Holt Vending Route Worker Mark Tarter Vending of Aquatics Brandi Hester Janowiecki Coordinator of Fitness & Wellness Emilie Saltz Coordinator Member Serv

  12. 2004 status report: Savings estimates for the Energy Star(R) voluntarylabeling program

    E-Print Network [OSTI]

    Webber, Carrie A.; Brown, Richard E.; McWhinney, Marla

    2004-01-01T23:59:59.000Z

    Y Commercial Steam Cookers………………… Y Commercialand commercial steam cookers. Refrigerated beverage vendingS TAR commercial steam cookers have the highest absolute per

  13. 2007 Status Report: Savings Estimates for the ENERGY STAR(R) VoluntaryLabeling Program

    E-Print Network [OSTI]

    Sanchez, Marla; Webber, Carrie A.; Brown, Richard E.; Homan, Gregory K.

    2007-01-01T23:59:59.000Z

    1996 a Commercial Steam Cookers………… Residentialand commercial steam cookers. Refrigerated beverage vendingS TAR commercial steam cookers have the highest absolute per

  14. 2005 Status Report Savings Estimates for the ENERGY STAR(R) Voluntary Labeling Program

    E-Print Network [OSTI]

    Webber, Carrie A.; Brown, Richard E.; Sanchez, Marla

    2006-01-01T23:59:59.000Z

    Commercial Steam Cookers……………… Commercial Fryers……………………….and commercial steam cookers. Refrigerated beverage vendingS TAR commercial steam cookers have the highest absolute per

  15. 2006 Status Report Savings Estimates for the ENERGY STAR(R) Voluntary Labeling Program

    E-Print Network [OSTI]

    Webber, Carrie A.; Brown, Richard E.; Sanchez, Marla; Homan, Gregory K.

    2006-01-01T23:59:59.000Z

    1996 a Commercial Steam Cookers………… Residentialand commercial steam cookers. Refrigerated beverage vendingS TAR commercial steam cookers have the highest absolute per

  16. Flexible programmable logic module

    DOE Patents [OSTI]

    Robertson, Perry J. (Albuquerque, NM); Hutchinson, Robert L. (Albuquerque, NM); Pierson, Lyndon G. (Albuquerque, NM)

    2001-01-01T23:59:59.000Z

    The circuit module of this invention is a VME board containing a plurality of programmable logic devices (PLDs), a controlled impedance clock tree, and interconnecting buses. The PLDs are arranged to permit systolic processing of a problem by offering wide data buses and a plurality of processing nodes. The board contains a clock reference and clock distribution tree that can drive each of the PLDs with two critically timed clock references. External clock references can be used to drive additional circuit modules all operating from the same synchronous clock reference.

  17. Introduction Space Time Codes Space Time Coding with Feedback New Thoughts Summary Space-Time Coding for Multi-Antenna

    E-Print Network [OSTI]

    Veeravalli, Venugopal

    Introduction Space Time Codes Space Time Coding with Feedback New Thoughts Summary Space 2007 #12;Introduction Space Time Codes Space Time Coding with Feedback New Thoughts Summary MIMO: Diversity vs Multiplexing Multiplexing Diversity Pictures taken from lectures notes on Space Time Coding

  18. Global Warming in Geologic Time

    ScienceCinema (OSTI)

    David Archer

    2010-01-08T23:59:59.000Z

    The notion is pervasive in the climate science community and in the public at large that the climate impacts of fossil fuel CO2 release will only persist for a few centuries. This conclusion has no basis in theory or models of the atmosphere / ocean carbon cycle, which we review here. The largest fraction of the CO2 recovery will take place on time scales of centuries, as CO2 invades the ocean, but a significant fraction of the fossil fuel CO2, ranging in published models in the literature from 20-60%, remains airborne for a thousand years or longer. Ultimate recovery takes place on time scales of hundreds of thousands of years, a geologic longevity typically associated in public perceptions with nuclear waste. The glacial / interglacial climate cycles demonstrate that ice sheets and sea level respond dramatically to millennial-timescale changes in climate forcing. There are also potential positive feedbacks in the carbon cycle, including methane hydrates in the ocean, and peat frozen in permafrost, that are most sensitive to the long tail of the fossil fuel CO2 in the atmosphere.

  19. Global Warming in Geologic Time

    SciTech Connect (OSTI)

    David Archer

    2008-02-27T23:59:59.000Z

    The notion is pervasive in the climate science community and in the public at large that the climate impacts of fossil fuel CO2 release will only persist for a few centuries. This conclusion has no basis in theory or models of the atmosphere / ocean carbon cycle, which we review here. The largest fraction of the CO2 recovery will take place on time scales of centuries, as CO2 invades the ocean, but a significant fraction of the fossil fuel CO2, ranging in published models in the literature from 20-60%, remains airborne for a thousand years or longer. Ultimate recovery takes place on time scales of hundreds of thousands of years, a geologic longevity typically associated in public perceptions with nuclear waste. The glacial / interglacial climate cycles demonstrate that ice sheets and sea level respond dramatically to millennial-timescale changes in climate forcing. There are also potential positive feedbacks in the carbon cycle, including methane hydrates in the ocean, and peat frozen in permafrost, that are most sensitive to the long tail of the fossil fuel CO2 in the atmosphere.

  20. Fermi Timing and Synchronization System

    SciTech Connect (OSTI)

    Wilcox, R.; Staples, J.; Doolittle, L.; Byrd, J.; Ratti, A.; Kaertner, F.X.; Kim, J.; Chen, J.; Ilday, F.O.; Ludwig, F.; Winter, A.; Ferianis, M.; Danailov, M.; D'Auria, G.

    2006-07-19T23:59:59.000Z

    The Fermi FEL will depend critically on precise timing of its RF, laser and diagnostic subsystems. The timing subsystem to coordinate these functions will need to reliably maintain sub-100fs synchronicity between distant points up to 300m apart in the Fermi facility. The technology to do this is not commercially available, and has not been experimentally demonstrated in a working facility. Therefore, new technology must be developed to meet these needs. Two approaches have been researched by different groups working with the Fermi staff. At MIT, a pulse transmission scheme has been developed for synchronization of RF and laser devices. And at LBL, a CW transmission scheme has been developed for RF and laser synchronization. These respective schemes have advantages and disadvantages that will become better understood in coming years. This document presents the work done by both teams, and suggests a possible system design which integrates them both. The integrated system design provides an example of how choices can be made between the different approaches without significantly changing the basic infrastructure of the system. Overall system issues common to any synchronization scheme are also discussed.

  1. A subquantum arrow of time

    E-Print Network [OSTI]

    Theo M. Nieuwenhuizen

    2014-09-10T23:59:59.000Z

    The outcome of a single quantum experiment is unpredictable, except in a pure-state limit. The definite process that takes place in the apparatus may either be intrinsically random or be explainable from a deeper theory. While the first scenario is the standard lore, the latter implies that quantum mechanics is emergent. In that case, it is likely that one has to reconsider radiation by accelerated charges as a physical effect, which thus must be compensated by an energy input. Stochastic electrodynamics, for example, asserts that the vacuum energy arises from classical fluctuations with energy $\\frac{1}{2}\\hbar\\omega$ per mode. In such theories the stability of the hydrogen ground state will arise from energy input from fluctuations and output by radiation, hence due to an energy throughput. That flux of energy constitutes an arrow of time, which we call the "subquantum arrow of time". It is related to the stability of matter and it is more fundamental than, e.g., the thermodynamic and cosmological arrows.

  2. Time Dependent Density Functional Theory An introduction

    E-Print Network [OSTI]

    Botti, Silvana

    Time Dependent Density Functional Theory An introduction Francesco Sottile LSI, Ecole Polytechnique (ETSF) Time Dependent Density Functional Theory Palaiseau, 7 February 2012 1 / 32 #12;Outline 1 Frontiers 4 Perspectives and Resources Francesco Sottile (ETSF) Time Dependent Density Functional Theory

  3. Variable residence time vortex combustor

    DOE Patents [OSTI]

    Melconian, Jerry O. (76 Beaver Rd., Reading, MA 01867)

    1987-01-01T23:59:59.000Z

    A variable residence time vortex combustor including a primary combustion chamber for containing a combustion vortex, and a plurality of louvres peripherally disposed about the primary combustion chamber and longitudinally distributed along its primary axis. The louvres are inclined to impel air about the primary combustion chamber to cool its interior surfaces and to impel air inwardly to assist in driving the combustion vortex in a first rotational direction and to feed combustion in the primary combustion chamber. The vortex combustor also includes a second combustion chamber having a secondary zone and a narrowed waist region in the primary combustion chamber interconnecting the output of the primary combustion chamber with the secondary zone for passing only lower density particles and trapping higher density particles in the combustion vortex in the primary combustion chamber for substantial combustion.

  4. Real time, TV-based, point-image quantizer and sorter

    DOE Patents [OSTI]

    Case, Arthur L. (Oak Ridge, TN); Davidson, Jackson B. (Oak Ridge, TN)

    1976-01-01T23:59:59.000Z

    A device is provided for improving the vertical resolution in a television-based, two-dimensional readout for radiation detection systems such as are used to determine the location of light or nuclear radiation impinging a target area viewed by a television camera, where it is desired to store the data indicative of the centroid location of such images. In the example embodiment, impinging nuclear radiation detected in the form of a scintillation occurring in a crystal is stored as a charge image on a television camera tube target. The target is scanned in a raster and the image position is stored according to a corresponding vertical scan number and horizontal position number along the scan. To determine the centroid location of an image that may overlap a number of horizontal scan lines along the vertical axis of the raster, digital logic circuits are provided with at least four series-connected shift registers, each having 512 bit positions according to a selected 512 horizontal increment of resolutions along a scan line. The registers are shifted by clock pulses at a rate of 512 pulses per scan line. When an image or portion thereof is detected along a scan, its horizontal center location is determined and the present front bit is set in the first shift register and shifted through the registers one at a time for each horizontal scan. Each register is compared bit-by-bit with the preceding register to detect coincident set bit positions until the last scan line detecting a portion of the image is determined. Depending on the number of shift registers through which the first detection of the image is shifted, circuitry is provided to store the vertical center position of the event according to the number of shift registers through which the first detection of the event is shifted. Interpolation circuitry is provided to determine if the event centroid is between adjacent scan lines and stored in a vertical address accordingly. The horizontal location of the event is stored in a separate address memory.

  5. Stationary distributions of continuous time Markov chains

    E-Print Network [OSTI]

    2012-04-13T23:59:59.000Z

    Apr 13, 2012 ... stationary distribution as the limiting fraction of time spent in states. 1 Stationary measures in continuous time. The following theorem is an ...

  6. NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK, WEST VIRGINIA

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK, WEST VIRGINIA ELECTRONICS DIVISION TECHNICAL NOTE .:41; CLOCK INFORMATION FOR AST 286 COMPUTERS Ronald B. Weimer The battery backed clock is only read (which does not set the battery clock) the AST keeps time from a second crystal oscillator. A rough block

  7. David Harris*, Mark A. Horowitz Stanford University, Stanford, CA

    E-Print Network [OSTI]

    Harris, David Money

    that some of the overhead can be reduced by using differential domino (also called dual rail) designs. An SR starts (indicated by the heavy dashed line) when the clock connected to the first gate in the half, the evaluate clock is late and the latch clock is early, decreasing time for logic. Many designers realize

  8. Benchmarking of energy time series

    SciTech Connect (OSTI)

    Williamson, M.A.

    1990-04-01T23:59:59.000Z

    Benchmarking consists of the adjustment of time series data from one source in order to achieve agreement with similar data from a second source. The data from the latter source are referred to as the benchmark(s), and often differ in that they are observed at a lower frequency, represent a higher level of temporal aggregation, and/or are considered to be of greater accuracy. This report provides an extensive survey of benchmarking procedures which have appeared in the statistical literature, and reviews specific benchmarking procedures currently used by the Energy Information Administration (EIA). The literature survey includes a technical summary of the major benchmarking methods and their statistical properties. Factors influencing the choice and application of particular techniques are described and the impact of benchmark accuracy is discussed. EIA applications and procedures are reviewed and evaluated for residential natural gas deliveries series and coal production series. It is found that the current method of adjusting the natural gas series is consistent with the behavior of the series and the methods used in obtaining the initial data. As a result, no change is recommended. For the coal production series, a staged approach based on a first differencing technique is recommended over the current procedure. A comparison of the adjustments produced by the two methods is made for the 1987 Indiana coal production series. 32 refs., 5 figs., 1 tab.

  9. pdf version of the entry Time Machines

    E-Print Network [OSTI]

    WĂŒthrich, Christian

    pdf version of the entry Time Machines http://plato.stanford.edu/archives/win2010/entries/time-machine, Stanford, CA 94305 Time Machines Copyright c 2010 by the authors John Earman and Christian Wšuthrich All rights reserved. Copyright policy: https://leibniz.stanford.edu/friends/info/copyright/ Time Machines

  10. Concurrency Theory Lecture 22: Timed Modelling & Conclusions

    E-Print Network [OSTI]

    Ábrahåm, Erika

    Systems Example 22.1 (Real-time reactive systems) brake systems and airbags in cars plant controls mobile.1 (Real-time reactive systems) brake systems and airbags in cars plant controls mobile phones ... Real-Time Reactive Systems Example 22.1 (Real-time reactive systems) brake systems and airbags in cars plant controls

  11. Introduction Discrete-time autoregressive process

    E-Print Network [OSTI]

    Di Girolami, Cristina

    Introduction Discrete-time autoregressive process Continuous-time Ornstein-Uhlenbeck process Sharp large deviations for the non-stationary Ornstein-Uhlenbeck process Bernard Bercu Bordeaux University-Uhlenbeck process 1 / 46 #12;Introduction Discrete-time autoregressive process Continuous-time Ornstein

  12. ASSESSMENT AND REFINEMENT OF REAL-TIME TRAVEL TIME ALGORITHMS FOR USE IN PRACTICE

    E-Print Network [OSTI]

    Bertini, Robert L.

    ASSESSMENT AND REFINEMENT OF REAL-TIME TRAVEL TIME ALGORITHMS FOR USE IN PRACTICE Final Report AND REFINEMENT OF REAL-TIME TRAVEL TIME ALGORITHMS FOR USE IN PRACTICE 5. Report Date June 2007 Final Report 6

  13. Using Run-Time Predictions to Estimate Queue Wait Times and Improve Scheduler Performance

    E-Print Network [OSTI]

    Feitelson, Dror

    that using our run-time predictor results in lower mean wait times for the workloads with higher o ered loads of the systems we are simulating.We also nd that using our run-time predictors result in mean wait timesUsing Run-Time Predictions to Estimate Queue Wait Times and Improve Scheduler Performance Warren

  14. ASSESSMENT AND REFINEMENT OF REAL-TIME TRAVEL TIME ALGORITHMS FOR USE

    E-Print Network [OSTI]

    Bertini, Robert L.

    ASSESSMENT AND REFINEMENT OF REAL- TIME TRAVEL TIME ALGORITHMS FOR USE IN PRACTICE (OTREC PHASE I) Final Report #12;#12;ASSESSMENT AND REFINEMENT OF REAL-TIME TRAVEL TIME ALGORITHMS FOR USE IN PRACTICE ASSESSMENT AND REFINEMENT OF REAL-TIME TRAVEL TIME ALGORITHMS FOR USE IN PRACTICE (OTREC PHASE 1) 5. Report

  15. Time-of-flight radio location system

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1996-01-01T23:59:59.000Z

    A bi-static radar configuration measures the direct time-of-flight of a transmitted RF pulse and is capable of measuring this time-of-flight with a jitter on the order of about one pico-second, or about 0.01 inch of free space distance for an electromagnetic pulse over a range of about one to ten feet. A transmitter transmits a sequence of electromagnetic pulses in response to a transmit timing signal, and a receiver samples the sequence of electromagnetic pulses with controlled timing in response to a receive timing signal, and generates a sample signal in response to the samples. A timing circuit supplies the transmit timing signal to the transmitter and supplies the receive timing signal to the receiver. The receive timing signal causes the receiver to sample the sequence of electromagnetic pulses such that the time between transmission of pulses in the sequence and sampling by the receiver sweeps over a range of delays. The receive timing signal sweeps over the range of delays in a sweep cycle such that pulses in the sequence are sampled at the pulse repetition rate, and with different delays in the range of delays to produce a sample signal representing magnitude of a received pulse in equivalent time. Automatic gain control circuitry in the receiver controls the magnitude of the equivalent time sample signal. A signal processor analyzes the sample signal to indicate the time-of-flight of the electromagnetic pulses in the sequence.

  16. EA-1674: Finding of No Significant Impact

    Broader source: Energy.gov [DOE]

    Energy Conservation Program: Energy Conservation Standards for Refrigerated Bottled or Canned Beverage Vending Machines

  17. Arnold Schwarzenegger REAL-TIME GRID RELIABILITY

    E-Print Network [OSTI]

    Arnold Schwarzenegger Governor REAL-TIME GRID RELIABILITY MANAGEMENT California ISO Real Laboratory Consortium for Electric Reliability Technology Solutions APPENDIXC October 2008 CEC-500 (VSA) prototype to monitor system voltage conditions and provide real time dispatchers with reliability

  18. Real-Time PCR Dean Fraga,1

    E-Print Network [OSTI]

    Jones, Michelle

    , Wooster, Ohio 2 Ohio Agricultural Research and Development Center, Wooster, Ohio 3 Ashland University, Ashland, Ohio OVERVIEW AND PRINCIPLES The real-time polymerase chain reaction (real-time PCR) is a recent

  19. EnergyPlus Run Time Analysis

    E-Print Network [OSTI]

    Hong, Tianzhen

    2009-01-01T23:59:59.000Z

    Tree Lawrence Berkeley National Laboratory  Page 37  California EnergyEnergy Commission EnergyPlus Run Time Analysis Plant Supply Calling Tree (Energy Commission EnergyPlus Run Time Analysis Appendix A – EnergyPlus Call Tree

  20. Fall Back Daylight Savings time is November

    E-Print Network [OSTI]

    Linsley, Braddock K.

    Fall Back ­ Daylight Savings time is November 2nd.The Energy Policy Act of 2005 changed both the starting and ending dates. Beginning in 2007, daylight time starts on the second Sunday in March and ends

  1. Time Dependent Density Functional Theory An Introduction

    E-Print Network [OSTI]

    Botti, Silvana

    Time Dependent Density Functional Theory An Introduction Francesco Sottile Laboratoire des Solides) Belfast, 29 Jun 2007 Time Dependent Density Functional Theory Francesco Sottile #12;Intro Formalism Dependent Density Functional Theory Francesco Sottile #12;Intro Formalism Results Resources Outline 1

  2. Time-predictable Computer Architecture Martin Schoeberl

    E-Print Network [OSTI]

    Time-predictable Computer Architecture Martin Schoeberl Institute of Computer Engineering Vienna. Then we propose solutions for a time- predictable computer architecture. The proposed architecture in computer architectures are: pipelining, instruction and data caching, dynamic branch prediction, out

  3. [PROCESSING WEB TIME ENTRY FOR EMPLOYEES

    E-Print Network [OSTI]

    2012 [PROCESSING WEB TIME ENTRY FOR EMPLOYEES] #12;Page 1 of 35 Contents Beginning the Process ....................................................................................... 33 #12;Page 2 of 35 Beginning the Process... Web Time Entry is processed through Banweb, using your

  4. Timing Verification of Adaptive Integrated Circuits

    E-Print Network [OSTI]

    Kumar, Rohit

    2014-08-01T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . . . . . . . 12 2.3 Hierarchical Timing Analysis . . . . . . . . . . . . . . . . . . . . . . . 17 2.4 Timing Yield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3. PROPOSED TECHNIQUES . . . . . . . . . . . . . . . . . . . . . . . . . 21 3... . . . . . . . . . . . . . . . . . . . . . . 10 2.2 Grid model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.3 Quadtree model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.4 Probabilisic event approach . . . . . . . . . . . . . . . . . . . . . . . 17 3...

  5. Dynamic Vehicle Routing with Stochastic Time Constraints

    E-Print Network [OSTI]

    Pavone, Marco

    In this paper we study a dynamic vehicle routing problem where demands have stochastic deadlines on their waiting times. Specifically, a network of robotic vehicles must service demands whose time of arrival, location and ...

  6. A Latent Time-Budget Model

    E-Print Network [OSTI]

    Jan de Leeuw; Peter G.M. van der Heijden; Peter Verboon

    2011-01-01T23:59:59.000Z

    DE L E E U W (1989), Latent budget analysis, in: A. DECARLI,DER H E U D E N (1988), The analysis of time- budgets with alatent-time-budget model, in E. Diday et al. (eds. ), Data

  7. Can hedge funds time market liquidity?

    E-Print Network [OSTI]

    Cao, Charles

    We explore a new dimension of fund managers' timing ability by examining whether they can time market liquidity through adjusting their portfolios' market exposure as aggregate liquidity conditions change. Using a large ...

  8. Parental Time, Behaviors and Childhood Obesity

    E-Print Network [OSTI]

    Kuteesa, Annette

    2012-02-14T23:59:59.000Z

    towards child health are modeled and analyzed using instrument variable (IV) methods. Results indicate that the effect of mother's time allocation reduces child weight status. Her decision to allocate time to the child is affected by unseen factors. Father...

  9. Time symmetry in wave function collapse models

    E-Print Network [OSTI]

    Daniel Bedingham

    2015-02-25T23:59:59.000Z

    A framework for wave function collapse models that is symmetric under time reversal is presented. Within this framework there are equivalent pictures of collapsing wave functions evolving in both time directions. The backwards-in-time Born rule can be broken by an initial condition on the Universe resulting in asymmetric behaviour. Similarly the forwards-in-time Born rule can in principle be broken by a final condition on the Universe.

  10. Quantum mechanical time contradicts the uncertainty principle

    E-Print Network [OSTI]

    Hitoshi Kitada

    1999-11-17T23:59:59.000Z

    The a priori time in conventional quantum mechanics is shown to contradict the uncertainty principle. A possible solution is given.

  11. A Time Model for Distributed Multimedia Applications

    E-Print Network [OSTI]

    KĂŒhnhauser, Winfried

    properties, using time to specify synchroneity, periodicity, ordering and timeliness. Last but not least objects arriving too late may become useless. Here, time is used to synchronize stream processing, encompassing for example HDTV video streams with a bit rate of up to 2.8 GBit/sec. Media streams have real-time

  12. Institutional Shareholders and SEO Market Timing

    E-Print Network [OSTI]

    Lin, Xiaodong

    Institutional Shareholders and SEO Market Timing Armen Hovakimian, Baruch College Huajing Hu, Baruch College #12;2 What do we do? Examine institutional ownership and trading around SEOs and relate these to SEO market timing 2 #12;3 The Goal Shed light on the nature of SEO market timing 3 #12;4 What is SEO

  13. Time (hole?) machines John Byron Manchak

    E-Print Network [OSTI]

    Manchak, John

    Time (hole?) machines John Byron Manchak Department of Philosophy, University of Washington, Box machines Hole machines Time travel General relativity a b s t r a c t Within the context of general relativity, we consider a type of "time machine" and introduce the related "hole machine". We review what

  14. Time Dependent Density Functional Theory An introduction

    E-Print Network [OSTI]

    Botti, Silvana

    Time Dependent Density Functional Theory An introduction Francesco Sottile LSI, Ecole Polytechnique) Time Dependent Density Functional Theory Palaiseau, 26 May 2014 1 / 62 #12;Outline 1 Introduction: why and Resources Francesco Sottile (ETSF) Time Dependent Density Functional Theory Palaiseau, 26 May 2014 2 / 62

  15. Blasthole timing control vibration, airblast and flyrock

    SciTech Connect (OSTI)

    Konya, C.J.; Walter, E.J.

    1988-01-01T23:59:59.000Z

    The authors say there is more to proper blasthole design than sequencing holes. Timing is one of the most important blast design variables. Timing controls the fragmentation size, piling of the broken material, maximum vibration level, airblast, flyrock, backbreak, endbreak and general overbreak. The authors explain how each of these items is controlled by timing.

  16. Convex Optimization: from Real-Time Embedded

    E-Print Network [OSTI]

    Hall, Julian

    Convex Optimization: from Real-Time Embedded to Large-Scale Distributed Stephen Boyd Neal Parikh of Edinburgh, June 25 2014 1 #12;Outline Convex Optimization Real-Time Embedded Optimization Large-Scale Distributed Optimization Summary 2 #12;Outline Convex Optimization Real-Time Embedded Optimization Large

  17. Timed CSP: A Retrospective Joel Ouaknine 1

    E-Print Network [OSTI]

    Ouaknine, Joël

    powerful: by syntactically transforming a Timed CSP process into a CSP one (essentially dropping all WAITAPC 2005 Timed CSP: A Retrospective Jošel Ouaknine 1 Oxford University Computing Laboratory, UK Timed CSP, from its inception nearly twenty years ago to very recent semantical and algorithmic

  18. Predicting Time-Delays under Real-Time Scheduling for Linear Model Predictive Control

    E-Print Network [OSTI]

    Zhang, Fumin

    Predicting Time-Delays under Real-Time Scheduling for Linear Model Predictive Control Zhenwu Shi prediction of time-delays caused by real-time scheduling. Then, a model predictive controller is designed, the interaction between real-time scheduling and control design has received interest in the literature

  19. Time-of-flight radio location system

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1997-01-01T23:59:59.000Z

    A bi-static radar configuration measures the direct time-of-flight of a transmitted RF pulse and is capable of measuring this time-of-flight with a jitter on the order of about one pico-second, or about 0.01 inch of free space distance for an electromagnetic pulse over a range of about one to ten feet. A transmitter transmits a sequence of electromagnetic pulses in response to a transmit timing signal, and a receiver samples the sequence of electromagnetic pulses with controlled timing in response to a receive timing signal, and generates a sample signal in response to the samples. A timing circuit supplies the transmit timing signal to the transmitter and supplies the receive timing signal to the receiver. The receive timing signal causes the receiver to sample the sequence of electromagnetic pulses such that the time between transmission of pulses in the sequence and sampling by the receiver sweeps over a range of delays. The receive timing signal sweeps over the range of delays in a sweep cycle such that pulses in the sequence are sampled at the pulse repetition rate, and with different delays in the range of delays to produce a sample signal representing magnitude of a received pulse in equivalent time. Automatic gain control circuitry in the receiver controls the magnitude of the equivalent time sample signal. A signal processor analyzes the sample signal to indicate the time-of-flight of the electromagnetic pulses in the sequence. The sample signal in equivalent time is passed through an envelope detection circuit, formed of an absolute value circuit followed by a low pass filter, to convert the sample signal to a unipolar signal to eliminate effects of antenna misorientation.

  20. Relativity theory in time-space

    E-Print Network [OSTI]

    Ákos G. Horváth

    2014-11-05T23:59:59.000Z

    The concept of time-space defined in an earlier paper of the author is certain generalization of the so-called space-time. In this paper we introduce the concept of time-space manifold. In the homogeneous case, the time-space manifold is a differentiable manifold with such tangent spaces which have certain fixed time-space structure. We redefine the fundamental concepts of global relativity theory with respect to this general situation. We study the concepts of affine connection, parallel transport, curvature tensor and Einstein equation, respectively.

  1. Time-Energy Costs of Quantum Measurements

    E-Print Network [OSTI]

    Chi-Hang Fred Fung; H. F. Chau

    2014-05-08T23:59:59.000Z

    Time and energy of quantum processes are a tradeoff against each other. We propose to ascribe to any given quantum process a time-energy cost to quantify how much computation it performs. Here, we analyze the time-energy costs for general quantum measurements, along a similar line as our previous work for quantum channels, and prove exact and lower bound formulae for the costs. We use these formulae to evaluate the efficiencies of actual measurement implementations. We find that one implementation for a Bell measurement is optimal in time-energy. We also analyze the time-energy cost for unambiguous state discrimination and find evidence that only a finite time-energy cost is needed to distinguish any number of states.

  2. Statistical criteria for characterizing irradiance time series.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Ellis, Abraham; Hansen, Clifford W.

    2010-10-01T23:59:59.000Z

    We propose and examine several statistical criteria for characterizing time series of solar irradiance. Time series of irradiance are used in analyses that seek to quantify the performance of photovoltaic (PV) power systems over time. Time series of irradiance are either measured or are simulated using models. Simulations of irradiance are often calibrated to or generated from statistics for observed irradiance and simulations are validated by comparing the simulation output to the observed irradiance. Criteria used in this comparison should derive from the context of the analyses in which the simulated irradiance is to be used. We examine three statistics that characterize time series and their use as criteria for comparing time series. We demonstrate these statistics using observed irradiance data recorded in August 2007 in Las Vegas, Nevada, and in June 2009 in Albuquerque, New Mexico.

  3. Reactor control rod timing system. [LMFBR

    DOE Patents [OSTI]

    Wu, P.T.K.

    1980-03-18T23:59:59.000Z

    A fluid driven jet-edge whistle timing system is described 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.

  4. Figure 7.1. Control of an alarm system. Figure 7.2. A simple memory element.

    E-Print Network [OSTI]

    Kalla, Priyank

    -digit BCD counter. Enable Q0 Q1 Q2 D0 D1 D2 Load Clock 1 0 0 0 Clock Q30 D3 Enable Q0 Q1 Q2 D0 D1 D2 Load Clock 0 0 0 Q30 D3 BCD0 BCD1 Clear Figure 7.30. Johnson counter. D Q Q Clock D Q Q D Q Q Q0 Q1 Qn 1 by CAD tools. Data Clock Latch #12;Figure 7.34. Timing simulation of storage elements. Figure 7.35. Code

  5. Bell's Jump Process in Discrete Time

    E-Print Network [OSTI]

    Jonathan Barrett; Matthew Leifer; Roderich Tumulka

    2005-09-27T23:59:59.000Z

    The jump process introduced by J. S. Bell in 1986, for defining a quantum field theory without observers, presupposes that space is discrete whereas time is continuous. In this letter, our interest is to find an analogous process in discrete time. We argue that a genuine analog does not exist, but provide examples of processes in discrete time that could be used as a replacement.

  6. Exact Primitives for Time Series Data Mining

    E-Print Network [OSTI]

    Mueen, Abdullah Al

    2012-01-01T23:59:59.000Z

    142 Sony AIBO Robot: Surfacetrajectories and ac- celerometer signals from SONY AIBOclasses of time series from the SONY AIBO accelerometer. (b)

  7. Nonlinear time-fractional dispersive equations

    E-Print Network [OSTI]

    P. Artale Harris; R. Garra

    2014-10-29T23:59:59.000Z

    In this paper we study some cases of time-fractional nonlinear dispersive equations (NDEs) involving Caputo derivatives, by means of the invariant subspace method. This method allows to find exact solutions to nonlinear time-fractional partial differential equations by separating variables. We first consider a third order time-fractional NDE that admits a four-dimensional invariant subspace and we find a similarity solution. We also study a fifth order NDE. In this last case we find a solution involving Mittag-Leffler functions. We finally observe that the invariant subspace method permits to find explicit solutions for a wide class of nonlinear dispersive time-fractional equations.

  8. Gauge Gravity and Space-Time

    E-Print Network [OSTI]

    Ning Wu

    2012-07-11T23:59:59.000Z

    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. Near Real-Time Push Middleware

    E-Print Network [OSTI]

    Mal, Siddhartha Byron

    2012-01-01T23:59:59.000Z

    Integration of “Near Real-Time Push Middleware” o Performance characterization and comparison with TuVista • DOE/LADWP Smart Grid

  10. EnergyPlus Run Time Analysis

    E-Print Network [OSTI]

    Hong, Tianzhen

    2009-01-01T23:59:59.000Z

    integrated heat balance calculations for loads, systems, andintegrated heat balance calculations for loads, systems, andloads calculation time steps per hour, the model solution algorithms (envelope heat

  11. Unraveling life four letters at a time

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

    since the official end of the Human Genome Project are fueling a revolution in genomics research. November 25, 2013 Unraveling life four letters at a time Reading the...

  12. Time reversal symmetry and collapse models

    E-Print Network [OSTI]

    Daniel Bedingham; Owen Maroney

    2015-02-24T23:59:59.000Z

    Collapse models are modifications of quantum theory where the wave function is treated as physically real and the collapse of the wave function is a physical process. This appears to introduce a time reversal asymmetry into the dynamics of the wave function since the collapses affect only the future state. This paper challenges this conclusion, showing that in three different examples of time asymmetries associated with collapse models, if the physically real part of the model can be reduced to the locations in space and time about which collapses occur, then such a model works both forward and backward in time, in each case satisfying the Born rule. Despite the apparent asymmetry of the collapse process, these models in fact have time reversal symmetry. Any physically observed time asymmetries that arise in such models are due to the asymmetric imposition of initial or final time boundary conditions, rather than from an inherent asymmetry in the dynamical law. This is the standard explanation of time asymmetric behaviour resulting from time symmetric laws.

  13. Author's personal copy The time dependent vehicle routing problem with time windows

    E-Print Network [OSTI]

    Bertini, Robert L.

    : (a) formulate a time dependent vehicle routing problem with a general cost function and time windowAuthor's personal copy The time dependent vehicle routing problem with time windows: Benchmark College of Engineering and Computer Science, PO Box 0751, Portland State University, Portland, OR 97207

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

    E-Print Network [OSTI]

    Ouaknine, Joël

    Nordic Journal of Computing 10(2003), 1­35. TIMED CSP = CLOSED TIMED -AUTOMATA JOšEL OUAKNINE CSP which significantly increase expressiveness. As a result, we are able to capture some of the most of the finite-state fragment of this augmented version of Timed CSP as that of closed timed -automata

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

    E-Print Network [OSTI]

    Ouaknine, Joël

    Nordic Journal of Computing 10(2003), 1--35. TIMED CSP = CLOSED TIMED #­AUTOMATA JO Ë? EL OUAKNINE CSP which significantly increase expressiveness. As a result, we are able to capture some of the most of the finite­state fragment of this augmented version of Timed CSP as that of closed timed #­automata

  16. Working times in atypical forms of employment: the special case of part-time work

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    market. In an Employment Survey carried out by the French National Statistics Office (INSEE), part- timeChapter 5 Working times in atypical forms of employment: the special case of part-time work Patrick Abstract: In the present article, we attempt to devise a typology of forms of part-time employment

  17. Nature of time and causality in Physics

    E-Print Network [OSTI]

    Francisco S. N. Lobo

    2008-02-14T23:59:59.000Z

    The conceptual definition and understanding of the nature of time, both qualitatively and quantitatively is of the utmost difficulty and importance, and plays a fundamental role in physics. Physical systems seem to evolve in paths of increasing entropy and of complexity, and thus, the arrow of time shall be explored in the context of thermodynamic irreversibility and quantum physics. In Newtonian physics, time flows at a constant rate, the same for all observers; however, it necessarily flows at different rates for different observers in special and general relativity. Special relativity provides important quantitative elucidations of the fundamental processes related to time dilation effects, and general relativity provides a deep analysis to effects of time flow, such as in the presence of gravitational fields. Through the special theory of relativity, time became intimately related with space, giving rise to the notion of spacetime, in which both parameters cannot be considered as separate entities. As time is incorporated into the proper structure of the fabric of spacetime, it is interesting to note that general relativity is contaminated with non-trivial geometries that generate closed timelike curves, and thus apparently violates causality. The notion of causality is fundamental in the construction of physical theories; therefore time travel and its associated paradoxes have to be treated with great caution. These issues are briefly analyzed in this review paper.

  18. Arnold Schwarzenegger REAL-TIME GRID RELIABILITY

    E-Print Network [OSTI]

    Arnold Schwarzenegger Governor REAL-TIME GRID RELIABILITY MANAGEMENT Prototype Phasor-Based Real Reliability Technology Solutions APPENDIXE October 2008 CEC-500-2008-049-APE #12;#12;Prepared By: Lawrence in this report. #12;Slide 0 Consortium for Electric Reliability Technology Solutions Real-Time Dynamics

  19. System Identification: Time Varying and Nonlinear Methods

    E-Print Network [OSTI]

    Majji, Manoranjan

    2010-07-14T23:59:59.000Z

    that the choice of the generalized time varying ARX model (GTV-ARX) can be set to realize a time varying dead beat observer. Methods to use the developed algorithm(s) in this research are then considered for application to the identification of system models...

  20. Fractal analysis of time varying data

    DOE Patents [OSTI]

    Vo-Dinh, Tuan (Knoxville, TN); Sadana, Ajit (Oxford, MS)

    2002-01-01T23:59:59.000Z

    Characteristics of time varying data, such as an electrical signal, are analyzed by converting the data from a temporal domain into a spatial domain pattern. Fractal analysis is performed on the spatial domain pattern, thereby producing a fractal dimension D.sub.F. The fractal dimension indicates the regularity of the time varying data.

  1. Contractions of planar graphs in polynomial time?

    E-Print Network [OSTI]

    Dimitrios, Thilikos

    Contractions of planar graphs in polynomial time? Marcin KamiŽnski??1 , Danišel Paulusma2 that for every graph H, there exists a polyno- mial-time algorithm deciding if a planar graph can be contracted to H. We introduce contractions and topological minors of embedded (plane) graphs and show that a plane

  2. EnergyPlus Run Time Analysis

    SciTech Connect (OSTI)

    Hong, Tianzhen; Buhl, Fred; Haves, Philip

    2008-09-20T23:59:59.000Z

    EnergyPlus is a new generation building performance simulation program offering many new modeling capabilities and more accurate performance calculations integrating building components in sub-hourly time steps. However, EnergyPlus runs much slower than the current generation simulation programs. This has become a major barrier to its widespread adoption by the industry. This paper analyzed EnergyPlus run time from comprehensive perspectives to identify key issues and challenges of speeding up EnergyPlus: studying the historical trends of EnergyPlus run time based on the advancement of computers and code improvements to EnergyPlus, comparing EnergyPlus with DOE-2 to understand and quantify the run time differences, identifying key simulation settings and model features that have significant impacts on run time, and performing code profiling to identify which EnergyPlus subroutines consume the most amount of run time. This paper provides recommendations to improve EnergyPlus run time from the modeler?s perspective and adequate computing platforms. Suggestions of software code and architecture changes to improve EnergyPlus run time based on the code profiling results are also discussed.

  3. REDUCING SOFTWARE PRODUCT DEVELOPMENT TIME John Callahan

    E-Print Network [OSTI]

    Callahan, John

    . Shortened product life cycles have meant that short development time is even more critical 3 . Short involvement early in the development cycle were found to lead to shorter development time. Also supported found that, during product concept development early in the development cycle, an overemphasis

  4. Integrated method for chaotic time series analysis

    DOE Patents [OSTI]

    Hively, L.M.; Ng, E.G.

    1998-09-29T23:59:59.000Z

    Methods and apparatus for automatically detecting differences between similar but different states in a nonlinear process monitor nonlinear data are disclosed. Steps include: acquiring the data; digitizing the data; obtaining nonlinear measures of the data via chaotic time series analysis; obtaining time serial trends in the nonlinear measures; and determining by comparison whether differences between similar but different states are indicated. 8 figs.

  5. Stanford Center for Position, Navigation & Time

    E-Print Network [OSTI]

    Straight, Aaron

    contributing exciting, novel new technologies, and together can play a leading role in this technology to rejuvenate the GLONASS system · Japan is also active with QZSS. #12;6 Outline A. Navigation & time technology;2 Stanford Center for Position Navigation and Time · The implementation of GPS in 1973 began this technology

  6. Gravity in Complex Hermitian Space-Time

    E-Print Network [OSTI]

    Ali H. Chamseddine

    2006-10-09T23:59:59.000Z

    A generalized theory unifying gravity with electromagnetism was proposed by Einstein in 1945. He considered a Hermitian metric on a real space-time. In this work we review Einstein's idea and generalize it further to consider gravity in a complex Hermitian space-time.

  7. Asymmetric Time Evolution and Indistinguishable Events

    SciTech Connect (OSTI)

    Bryant, P. W. [Center for Complex Quantum Systems, Department of Physics, University of Texas at Austin, Austin, Texas 78712 (United States)

    2010-11-25T23:59:59.000Z

    With a time asymmetric theory, in which quantum mechanical time evolution is given by a semigroup of operators rather than by a group, the states of open systems are represented by density operators exhibiting a branching behavior. To treat the indistinguishably of the members of experimental ensembles, we hypothesize that environmental interference occurs during events that are themselves fundamentally indistinguishable.

  8. Fortuna: Model Checking Priced Probabilistic Timed Automata

    E-Print Network [OSTI]

    Vaandrager, Frits

    Fortuna: Model Checking Priced Probabilistic Timed Automata Jasper Berendsen, David N. Jansen.O. Box 9010, 6500 GL Nijmegen, the Netherlands Abstract. We introduce Fortuna, the first tool for model checking priced probabilistic timed automata (PPTAs). Fortuna can handle the combination of real

  9. Fortuna: Model Checking Priced Probabilistic Timed Automata

    E-Print Network [OSTI]

    Vaandrager, Frits

    Fortuna: Model Checking Priced Probabilistic Timed Automata Jasper Berendsen, David N. Jansen, the Netherlands Email: jasperb,dnjansen,fvaan @cs.ru.nl Abstract--We introduce FORTUNA, the first tool for model of probabilistic timed automata (PTAs) with cost-rates and discrete cost increments on states. FORTUNA is able

  10. Designing Distributed, Real-Time Systems

    E-Print Network [OSTI]

    Mills, Kevin

    - - Designing Distributed, Real-Time Systems Kevin L. Mills INFT 796 SUMMER 1993 DIRECTED READINGS IN SOFTWARE ENGINEERING WITH DR. H. GOMAA GEORGE MASON UNIVERSITY #12;Designing Distributed, Real-Time Systems problem faced by designers of software systems, and particularly by designers of distributed, real

  11. Time Series Analysis James D. Hamilton

    E-Print Network [OSTI]

    Landweber, Laura

    Time Series Analysis James D. Hamilton Since its publication just over ten years ago, James Hamilton's Time Series Analysis has taken its place in the canon of modern technical eco- nomic literature study, Hamilton's book en- joyed popularity among econometricians in seminars in Europe and North

  12. A REAL-TIME AUTONOMOUS NAVIGATION ARCHITECTURE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A REAL-TIME AUTONOMOUS NAVIGATION ARCHITECTURE Gang Chen, Thierry Fraichard and Luis Martinez for autonomous navigation: perception, localisation, mapping, real-time motion planning and motion tracking. INTRODUCTION Autonomous navigation requires to solve a num- ber of challenging problems in domains as dif

  13. Integrated method for chaotic time series analysis

    DOE Patents [OSTI]

    Hively, Lee M. (Philadelphia, TN); Ng, Esmond G. (Concord, TN)

    1998-01-01T23:59:59.000Z

    Methods and apparatus for automatically detecting differences between similar but different states in a nonlinear process monitor nonlinear data. Steps include: acquiring the data; digitizing the data; obtaining nonlinear measures of the data via chaotic time series analysis; obtaining time serial trends in the nonlinear measures; and determining by comparison whether differences between similar but different states are indicated.

  14. Time Centrality in Dynamic Complex Networks

    E-Print Network [OSTI]

    Costa, Eduardo Chinelate; Wehmuth, Klaus; Ziviani, Artur; da Silva, Ana Paula Couto

    2015-01-01T23:59:59.000Z

    There is an ever-increasing interest in investigating dynamics in time-varying graphs (TVGs). So far, however, the notion of centrality in TVG scenarios usually refers to metrics that assess the relative importance of nodes along the temporal evolution of the network. Nevertheless, for some TVG scenarios, more important than identifying the central nodes under a given definition is identifying the \\emph{key time instants} for taking certain actions. In this paper, we introduce the notion of \\emph{time centrality} in TVGs. Analogously to node centrality, time centrality evaluates the relative importance of time instants in dynamic complex networks. We present two time centrality metrics related to diffusion processes. We evaluate the two defined metrics using a real-world dataset representing a in-person contact dynamic network. We validate the concept of time centrality showing that diffusion starting at the best classified time instants (i.e. the most central ones), according to our metrics, can perform a fa...

  15. Light gas gun with reduced timing jitter

    DOE Patents [OSTI]

    Laabs, G.W.; Funk, D.J.; Asay, B.W.

    1998-06-09T23:59:59.000Z

    Gas gun with reduced timing jitter is disclosed. A gas gun having a prepressurized projectile held in place with a glass rod in compression is described. The glass rod is destroyed with an explosive at a precise time which allows a restraining pin to be moved and free the projectile. 4 figs.

  16. Approaching Real-time Network Traffic Classification

    E-Print Network [OSTI]

    Haddadi, Hamed

    and studies. It serves as the input for Intrusion Detection Systems, provides Class-of-Service (CoS) mapping22 Approaching Real-time Network Traffic Classification ISSN 1470-5559 RR-06-12 October 2006-time Network Traffic Classification Wei Li, Kaysar Abdin, Robert Dann and Andrew Moore Department of Computer

  17. Laser Telecommunication timeLaser beam

    E-Print Network [OSTI]

    La Rosa, Andres H.

    Laser Telecommunication Experiment Laser time Laser beam intensity timeLaser beam Laser battery Laser connected to a circuit without a modulator. Bottom graph illustrates what happen when a modulating signal is superimposed to the DC voltage driving the laser Laser beam intensity DC Input voltage DC

  18. HR EMPLOYMENT LAW UPDATES TIME TO TRAIN

    E-Print Network [OSTI]

    Sussex, University of

    HR EMPLOYMENT LAW UPDATES TIME TO TRAIN Since 6 April 2010 employers have had to seriously consider an eligible employee's formal request for time away from their core duties to undertake training. Employees can request to undertake training they think will improve both their own and the University

  19. Absolute Time Radiometric Dating: the source

    E-Print Network [OSTI]

    Kammer, Thomas

    Absolute Time Radiometric Dating: the source of the dates on the Geologic Time Scale #12 as an element changes to another element, e.g. uranium to lead. · The parent element is radioactive · Carbon-14, C14 Nitrogen-14, N14 · Uranium-235, U235 Lead-207, Pb207 · Potassium-40, K40 Argon-40, Ar40

  20. Pseudo-Z symmetric space-times

    SciTech Connect (OSTI)

    Mantica, Carlo Alberto, E-mail: carloalberto.mantica@libero.it [Physics Department, Università degli Studi di Milano, Via Celoria 16, 20133 Milano (Italy); Suh, Young Jin, E-mail: yjsuh@knu.ac.kr [Department of Mathematics, Kyungpook National University, Taegu 702-701 (Korea, Republic of)

    2014-04-15T23:59:59.000Z

    In this paper, we investigate Pseudo-Z symmetric space-time manifolds. First, we deal with elementary properties showing that the associated form A{sub k} is closed: in the case the Ricci tensor results to be Weyl compatible. This notion was recently introduced by one of the present authors. The consequences of the Weyl compatibility on the magnetic part of the Weyl tensor are pointed out. This determines the Petrov types of such space times. Finally, we investigate some interesting properties of (PZS){sub 4} space-time; in particular, we take into consideration perfect fluid and scalar field space-time, and interesting properties are pointed out, including the Petrov classification. In the case of scalar field space-time, it is shown that the scalar field satisfies a generalized eikonal equation. Further, it is shown that the integral curves of the gradient field are geodesics. A classical method to find a general integral is presented.

  1. Bayesian inference for pulsar timing models

    E-Print Network [OSTI]

    Vigeland, Sarah J

    2013-01-01T23:59:59.000Z

    The extremely regular, periodic radio emission from millisecond pulsars make them useful tools for studying neutron star astrophysics, general relativity, and low-frequency gravitational waves. These studies require that the observed pulse time of arrivals are fit to complicated timing models that describe numerous effects such as the astrometry of the source, the evolution of the pulsar's spin, the presence of a binary companion, and the propagation of the pulses through the interstellar medium. In this paper, we discuss the benefits of using Bayesian inference to obtain these timing solutions. These include the validation of linearized least-squares model fits when they are correct, and the proper characterization of parameter uncertainties when they are not; the incorporation of prior parameter information and of models of correlated noise; and the Bayesian comparison of alternative timing models. We describe our computational setup, which combines the timing models of tempo2 with the nested-sampling integ...

  2. Model Checking Prioritized Timed Automata Shang-Wei Lin, Pao-Ann Hsiung, Chun-Hsian Huang, and Yean-Ru Chen

    E-Print Network [OSTI]

    Hsiung, Pao-Ann

    on two clock zones, represented by DBMs, for which we propose an algorithm to generate the minimal number Bound Matrices (DBMs), is required. We have proposed an algorithm to perform the subtraction operation on two DBMs [14]. This algorithmgenerates the minimal num- ber of zones partitioned

  3. Energy-time and frequency-time uncertainty relations: exact inequalities

    E-Print Network [OSTI]

    V. V. Dodonov; A. V. Dodonov

    2015-04-03T23:59:59.000Z

    We give a short review of known exact inequalities that can be interpreted as "energy-time" and "frequency-time" uncertainty relations. In particular we discuss a precise form of signals minimizing the physical frequency-time uncertainty product. Also, we calculate the "stationarity time" for mixed Gaussian states of a quantum harmonic oscillator, showing explicitly that pure quantum states are "more fragile" than mixed ones with the same value of the energy dispersion. The problems of quantum evolution speed limits, time operators and measurements of energy and time are briefly discussed, too.

  4. Time changes in gradient and observed winds

    E-Print Network [OSTI]

    Carlson, Ronald Dale

    1972-01-01T23:59:59.000Z

    TIME CHANGES IN GRADIENT AND OBSERVED WINDS A Thesis by RONALD DALE CARLSON Submitted to the Graduate College of Texas A&M University in partial fulfillm=n of the requirement for the degree of MASTER OF SCIENCE MAY 1972 Major Subject...: Meteorology TIME CHANGES IN GRADIENT AND OBSERVED WINDS A Thesis by RONALD D. CARLSON Approved as to style and content by: (Chairman of Co , ee) (Member) (Member) May 1972 ABSTRACT Time Changes in Gradient and Observed Winds. (May 1972) Ronald Dale...

  5. Long-time limit of correlation functions

    E-Print Network [OSTI]

    Thomas Franosch

    2014-07-31T23:59:59.000Z

    Auto-correlation functions in an equilibrium stochastic process are well-characterized by Bochner's theorem as Fourier transforms of a finite symmetric Borel measure. The existence of a long-time limit of these correlation functions depends on the spectral properties of the measure. Here we provide conditions applicable to a wide-class of dynamical theories guaranteeing the existence of the long-time limit. We discuss the implications in the context of the mode-coupling theory of the glass transition where a non-trivial long-time limit signals an idealized glass state.

  6. Space-time and G_2

    E-Print Network [OSTI]

    Boris Doubrov; Jonathan Holland; George Sparling

    2009-01-05T23:59:59.000Z

    A Weyl structure is a bundle over space-time, whose fiber at each space-time point is a space of maximally isotropic complex tangent planes. We develop the theory of Weyl connections for Weyl structures and show that the requirement that the connection be torsion-free fixes the Weyl connection uniquely. Further we show that to each such Weyl connection, there is naturally associated a (2, 3, 5)-Pfaffian system, as first analyzed by Cartan. We determine the associated G_2-conformal structure and calculate it explicitly in the cases of the Kapadia family of space-times and of the Schwarzschild solution

  7. The determination of time lags using SOLA

    E-Print Network [OSTI]

    Frank P. Pijpers

    1996-07-17T23:59:59.000Z

    A common problem in astronomy is the determination of the time shift between two otherwise identical time series of measured flux from a variable source, in short the determination of a time lag. Two examples of where this problem occurs are in the determination of the Hubble constant from multiple images of gravitationally lensed variable quasars and also in the determination of distances to OH/IR stars. It is shown here that this problem can be seen as a restricted inversion problem. It therefore can be solved using the subtractive optimally localized averages (SOLA) method for inversion which has been described elsewhere (Pijpers & Thompson 1992, 1994 ; Pijpers & Wanders 1994).

  8. Automatic tuning of continuous-time filters

    E-Print Network [OSTI]

    Sumesaglam, Taner

    2004-11-15T23:59:59.000Z

    Integrated high-Q continuous-time filters require adaptive tuning circuits that will correct the filter parameters such as center frequency and quality factor (Q). Three different automatic tuning techniques are introduced. In all of the proposed...

  9. It's About Time: Investing in Transportation to

    E-Print Network [OSTI]

    MARCH 2011 It's About Time: Investing in Transportation to Keep Texas Economically Competitive #12 of Contents Preface 1 The Challenge Facing Texans 3 Texas Transportation Action Principles 6 Texas' Deteriorating Transportation System: Background and Measurement 8 Baseline Scenario: Unacceptable Conditions

  10. Automatic program timing profiles with FTN4

    SciTech Connect (OSTI)

    Friedman, R.

    1980-09-01T23:59:59.000Z

    Design of a scheme for producing execution timing profiles of FORTRAN programs automatically is proposed with a recommendation to implement it as an option to the compiler. An experimental implementation on the LBL 7600 is also described. 1 figure.

  11. Time dependences of atmospheric Carbon dioxide fluxes

    E-Print Network [OSTI]

    DeSalvo, Riccardo

    2014-01-01T23:59:59.000Z

    Understanding the lifetime of CO2 in the atmosphere is critical for predictions regarding future climate changes. A simple mass conservation analysis presented here generates tight estimations for the atmosphere's retention time constant. The analysis uses a leaky integrator model that combines the observed deficit (only less than 40% of CO2 produced from combustion of fossil fuels is actually retained in the atmosphere, while more than 60% is continuously shed) with the exponential growth of fossil fuel burning. It reveals a maximum characteristic time of less than 23 year for the transfer of atmospheric CO2 to a segregation sink. This time constant is further constrained by the rapid disappearance of 14C after the ban of atmospheric atomic bomb tests, which provides a lower limit of 18 years for this transfer. The study also generates evaluations of other CO2 fluxes, exchange time constants and volumes exchanged. Analysis of large harmonic oscillations of atmospheric CO2 concentration, often neglected in th...

  12. Timing control by redundant inhibitory neuronal circuits

    SciTech Connect (OSTI)

    Tristan, I., E-mail: itristan@ucsd.edu; Rulkov, N. F.; Huerta, R.; Rabinovich, M. [BioCircuits Institute, University of California, San Diego, La Jolla, California 92093-0402 (United States)] [BioCircuits Institute, University of California, San Diego, La Jolla, California 92093-0402 (United States)

    2014-03-15T23:59:59.000Z

    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.

  13. Wind and time in Homeric epic

    E-Print Network [OSTI]

    Purves, AC

    2010-01-01T23:59:59.000Z

    73–83. Scott, W. C. 1966. “Wind Imagery in the Oresteia. ”30–35; West 1961: 133–36. Wind and Time in Homeric Epic ———56. Stern, L. 2004. “‘Paths That Wind through the Thicket of

  14. Diffraction in Time of Polymer Particles

    E-Print Network [OSTI]

    A. Martín-Ruiz

    2014-06-13T23:59:59.000Z

    We study the quantum dynamics of a suddenly released beam of particles using a background independent (polymer) quantization scheme. We show that, in the first order of approximation, the low-energy polymer distribution converges to the standard quantum-mechanical result in a clear fashion, but also arises an additional small polymer correction term. We find that the high-energy polymer behaviour becomes predominant at short distances and short times. Numerical results are also presented. We find that particles whose wave functions satisfy the polymer wave equation do not exhibit the diffraction in time phenomena. The implementation of a lower bound to the possible resolution of times into the time-energy Heisenberg uncertainty relation is briefly discussed.

  15. Time-Resolved Photoluminescence and Photovoltaics

    SciTech Connect (OSTI)

    Metzger, W. K.; Ahrenkiel, R. K.; Dippo, P.; Geisz, J.; Wanlass, M. W.; Kurtz, S.

    2005-01-01T23:59:59.000Z

    The time-resolved photoluminescence (TRPL) technique and its ability to characterize recombination in bulk photovoltaic semiconductor materials are reviewed. Results from a variety of materials and a few recent studies are summarized and compared.

  16. Real-time control over networks

    E-Print Network [OSTI]

    Ji, Kun

    2007-09-17T23:59:59.000Z

    researchers to develop NCSs to implement distributed control schemes. This dissertation presents a framework for the modeling, design, stability analysis, control, and bandwidth allocation of real-time control over networks. This framework covers key research...

  17. Picosecond laser timing by rf phase shifting

    E-Print Network [OSTI]

    Johnson, Carey K.; Qian, Jun

    1990-01-01T23:59:59.000Z

    lasers pumped by synchronized mode?locked, Q?switched, cw Nd:YAG lasers. The phase shifter operates with better than 10?ps precision and generates time delays from 0 to 26 ns....

  18. Cycle time reduction through wafer starts control

    E-Print Network [OSTI]

    Wang, Sam, M.B.A. Massachusetts Institute of Technology

    2008-01-01T23:59:59.000Z

    Intel's Fab 17, located in Hudson, Massachusetts, has experienced dramatic improvements in its cycle time performance in the last two years. These improvements have been attributed to lean implementation efforts, reduced ...

  19. PRELIMINARY TIME ESTIMATES FOR CORING OPERATIONS

    E-Print Network [OSTI]

    EQUATIONS 17 FIGURE 1. DRILL STRING ROUND TRIP 19 FIGURE 2. STANDARD ROTARY CORING (RCB) WIRELINE TRIP 21) WIRELINE TRIP 25 FIGURE 5. ESTIMATED RIGGING, WIRELINE, AND SCANNING TIME FOR REENTRY. 27 #12;Preliminary

  20. Real Time Grid Reliability Management 2005

    E-Print Network [OSTI]

    Eto, Joe

    2008-01-01T23:59:59.000Z

    SCE, W APA, PG&E Data • PDC – PI Interface frequency dataIntegration of CA ISO PDC with Arbiters California Real-TimePhasor Data Concentrator (PDC) receives data from PMUs in

  1. Multiphase fluid flow and time lapse seismics

    E-Print Network [OSTI]

    santos

    Time-lapse seismic surveys aim to monitor the migration and dispersal of the CO2 ... of CO2-brine flow and seismic wave propagation to model and monitor CO2 ...

  2. Introduction to the time scale problem

    SciTech Connect (OSTI)

    Voter, A. F.

    2002-01-01T23:59:59.000Z

    As motivation for the symposium on extended-scale atomistic methods, I briefly discuss the time scale problem that plagues molecular dynamics simulations, some promising recent developments for circumventing the problem, and some remaining challenges.

  3. Am I spikes over time? Leslie Smith

    E-Print Network [OSTI]

    Smith, Leslie S.

    Am I spikes over time? Leslie Smith Computing Science and Mathematics University of Stirling Stirling FK9 4LA, UK Email: l.s.smith@cs.stir.ac.uk URL: http://www.cs.stir.ac.uk/~lss Acknowledgements: EU

  4. REAL TIME SYSTEM OPERATIONS 2006-2007

    E-Print Network [OSTI]

    Eto, Joseph H.

    2008-01-01T23:59:59.000Z

    based on real?time PMU data  by observing the differences as  analysis of WECC PMU data.  The recommended analysis approach.   V (pu) P-V curve PMU data P (pu) P-V curve PMU

  5. Intelligent Time-Successive Production Modeling

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    ;Background · Production Data Analysis Decline Curve Analysis (Arps, 1945) Type Curve Matching (Fetkovich Analysis Pressure Data + Production Rate Data ·Material Balance methods ·Pseudo time and pseudo pressure

  6. Significantly reduce maintenance time Documents&Mediabecomesthekey

    E-Print Network [OSTI]

    Mullins, Dyche

    Significantly reduce maintenance time · Documents&Mediabecomesthekey contactforallmaintenanceneeds. · MajorpartsarestoredbyDocuments& MediaattheMissionCenter.Thisreduces thetimeneededtoorderpartsandresultsin&Mediaoffersthecampus communityaconvenientandeconomicsolution foritscopiers,multifunctiondevicesandprinter needs. Print Management Program advantages Reduce

  7. Solar Real-Time Pricing: Is Real-Time Electricity Pricing Beneficial...

    Energy Savers [EERE]

    to Solar PV in New York City? Solar Real-Time Pricing: Is Real-Time Electricity Pricing Beneficial to Solar PV in New York City? The goal of this study is to evaluate the...

  8. Blind calibration of timing skew in time-interleaved analog-to-digital converters

    E-Print Network [OSTI]

    Divi, Vijay

    The performance of time-interleaved analog-to-digital converters is often significantly degraded by timing mismatch errors. We develop methods for performing blind calibration of such converters, i.e., for estimating the ...

  9. Exact Philosophy of Space-Time

    E-Print Network [OSTI]

    Héctor Vucetich

    2011-09-26T23:59:59.000Z

    Starting from Bunge's (1977) scientific ontology, we expose a materialistic relational theory of space-time, that carries out the program initiated by Leibniz, and provides a protophysical basis consistent with any rigorous formulation of General Relativity. Space-time is constructed from general concepts which are common to any consistent scientific theory and they are interpreted as emergent properties of the greatest assembly of things, namely, the world.

  10. REAL TIME SYSTEM OPERATIONS 2006-2007

    SciTech Connect (OSTI)

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

    2008-08-15T23:59:59.000Z

    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.

  11. Wormholes and Time Travel? Not Likely

    E-Print Network [OSTI]

    Leonard Susskind

    2005-04-08T23:59:59.000Z

    Wormholes have been advanced as both a method for circumventing the limitations of the speed of light as well as a means for building a time machine (to travel to the past). Thus it is argued that General Relativity may allow both of these possibilities. In this note I argue that traversable wormholes connecting otherwise causally disconnected regions, violate two of the most fundamental principles physics, namely local energy conservation and the energy-time uncertainty principle.

  12. The Tides Of Time Issue 29

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    The Tides of Time 29 • 1 • Easter Vacation 2004 The Oxford University Doctor Who Society Magazine The Tides of Time Easter Vacation 2004 Issue 29 BUFFY AND THE BRITISH Star Trek The Prisoner The career of Brian Clemens … …and... Kilburn Wiles Thing! 24 A look at John Wiles’s period as producer of Doctor Who Brian Clemens 26 James Davies marks the achievements of this writer-producer How does Doctor Who entertain? 30 Asking the question, Daniel...

  13. Escape time statistics for mushroom billiards

    E-Print Network [OSTI]

    T. Miyaguchi

    2006-12-27T23:59:59.000Z

    Chaotic orbits of mushroom billiards display intermittent behaviors. We investigate statistical properties of this system by constructing an infinite partition on the chaotic part of a Poincar\\'e surface which illustrates details of chaotic dynamics. Each piece of the infinite partition has an unique escape time from the half disk region, and from this result it is shown that, for fixed values of the system parameters, the escape time distribution obeys power law $1/t_{\\rm esc}^3$.

  14. CX-005932: Categorical Exclusion Determination | Department of...

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

    heater time clocks) and replace roof, retrofit plumbing fixtures, thermostats, occupancy sensors, and lighting fixture replacements at Thalin Hall, 3) conduct feasibility study...

  15. Energy Efficiency and Conservation Block Grant Program

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

    heater time clocks) and replace roof, retrofit plumbing fixtures, thermostats, occupancy sensors, and lighting fixture replacements at Thalin Hall; 3) conduct feasibility study...

  16. Demo Abstract: A Scalable Low-Cost Solution to Provide Personalized Home Heating Advice to Households

    E-Print Network [OSTI]

    Southampton, University of

    MB Data Flash TMP275 Temperature Sensor Real-Time Clock 30mAh Li-ion Battery Battery Charger / Switch

  17. Time Domain Continuous Imaging TIME DOMAIN CONTINUOUS IMAGING doesn't sound like

    E-Print Network [OSTI]

    Dietz, Henry G. "Hank"

    the scene with skewed timing and exposure settings. Our 3D-printed array camera at SC14 coordinates four

  18. A Timing Requirements-Aware Scratchpad Memory Allocation Scheme for a Precision Timed Architecture

    E-Print Network [OSTI]

    , and the following companies: Agilent, Bosch, HSBC, Lockheed-Martin, National Instruments, and Toyota. #12;A Timing

  19. Problem of Time: Facets and Machian Strategy

    E-Print Network [OSTI]

    Edward Anderson

    2014-07-15T23:59:59.000Z

    The Problem of Time is that `time' in each of ordinary quantum theory and general relativity are mutually incompatible notions. This causes difficulties in trying to put these two theories together to form a theory of Quantum Gravity. The Problem of Time has 8 facets in canonical approaches. I clarify that all but one of these facets already occur at the classical level, and reconceptualize and re-name some of these facets as follows.The Frozen Formalism Problem becomes Temporal Relationalism, the Thin Sandwich Problem becomes Configurational Relationalism, via the notion of Best Matching. The Problem of Observables becomes the Problem of Beables, and the Functional Evolution Problem becomes the Constraint Closure Problem. I also outline how each of the Global and Multiple-Choice Problems of Time have their own plurality of facets. This article additionally contains a local resolution to the Problem of Time at the conceptual level and which is actually realizable for the relational triangle and minisuperspace models. This resolution is, moreover, Machian, and has three levels: classical, semiclassical and a combined semiclassical-histories-timeless records scheme. I end by delineating the current frontiers of this program toward resolution of the Problem of Time in the cases of full GR and of slightly inhomogeneous cosmology.

  20. Cosmologies with a time dependent vacuum

    E-Print Network [OSTI]

    Joan Sola

    2011-02-09T23:59:59.000Z

    The idea that the cosmological term, Lambda, should be a time dependent quantity in cosmology is a most natural one. It is difficult to conceive an expanding universe with a strictly constant vacuum energy density, namely one that has remained immutable since the origin of time. A smoothly evolving vacuum energy density that inherits its time-dependence from cosmological functions, such as the Hubble rate or the scale factor, is not only a qualitatively more plausible and intuitive idea, but is also suggested by fundamental physics, in particular by quantum field theory (QFT) in curved space-time. To implement this notion, is not strictly necessary to resort to ad hoc scalar fields, as usually done in the literature (e.g. in quintessence formulations and the like). A "running" Lambda term can be expected on very similar grounds as one expects (and observes) the running of couplings and masses with a physical energy scale in QFT. Furthermore, the experimental evidence that the equation of state of the dark energy could be evolving with time/redshift (including the possibility that it might currently behave phantom-like) suggests that a time-variable Lambda term (possibly accompanied by a variable Newton's gravitational coupling G=G(t)) could account in a natural way for all these features. Remarkably enough, a class of these models (the "new cosmon") could even be the clue for solving the old cosmological constant problem, including the coincidence problem.

  1. Metastring Theory and Modular Space-time

    E-Print Network [OSTI]

    Laurent Freidel; Robert G. Leigh; Djordje Minic

    2015-02-27T23:59:59.000Z

    String theory is canonically accompanied with a space-time interpretation which determines S-matrix-like observables, and connects to the standard physics at low energies in the guise of local effective field theory. Recently, we have introduced a reformulation of string theory which does not rely on an {\\it a priori} space-time interpretation or a pre-assumption of locality. This \\hlt{metastring theory} is formulated in such a way that stringy symmetries (such as T-duality) are realized linearly. In this paper, we study metastring theory on a flat background and develop a variety of technical and interpretational ideas. These include a formulation of the moduli space of Lorentzian worldsheets, a careful study of the symplectic structure and consequently consistent closed and open boundary conditions, and the string spectrum and operator algebra. What emerges from these studies is a new quantum notion of space-time that we refer to as a quantum Lagrangian or equivalently a \\hlt{modular space-time}. This concept embodies the standard tenets of quantum theory and implements in a precise way a notion of {relative locality}. The usual string backgrounds (non-compact space-time along with some toroidally compactified spatial directions) are obtained from modular space-time by a limiting procedure that can be thought of as a correspondence limit.

  2. Polynomial Time Algorithms for Minimum Energy Scheduling

    E-Print Network [OSTI]

    Baptiste, Philippe; Durr, Christoph

    2009-01-01T23:59:59.000Z

    The aim of power management policies is to reduce the amount of energy consumed by computer systems while maintaining satisfactory level of performance. One common method for saving energy is to simply suspend the system during the idle times. No energy is consumed in the suspend mode. However, the process of waking up the system itself requires a certain fixed amount of energy, and thus suspending the system is beneficial only if the idle time is long enough to compensate for this additional energy expenditure. In the specific problem studied in the paper, we have a set of jobs with release times and deadlines that need to be executed on a single processor. Preemptions are allowed. The processor requires energy L to be woken up and, when it is on, it uses one unit of energy per one unit of time. It has been an open problem whether a schedule minimizing the overall energy consumption can be computed in polynomial time. We solve this problem in positive, by providing an O(n^5)-time algorithm. In addition we pr...

  3. Time and Cognitive Load 1 Time and Cognitive Load in Working Memory

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Time and Cognitive Load 1 Time and Cognitive Load in Working Memory Pierre Barrouillet*, Sophie Bourgogne Running head: Time and Cognitive Load Corresponding author: Pierre Barrouillet Pierre manuscript, published in "Journal of Experimental Psychology: Learning, Memory, and Cognition 33, 3 (2007

  4. A ROUTE IMPROVEMENT ALGORITHM FOR THE VEHICLE ROUTING PROBLEM WITH TIME DEPENDENT TRAVEL TIMES

    E-Print Network [OSTI]

    Bertini, Robert L.

    . This research presents a new solution approach, an iterative route construction and improvement algorithm (IRCI such as greenhouse gases, noise, and air pollution. Routing models with time-varying travel times are gaining greater attention in vehicle routing literature and industry. However, research on the time dependent vehicle

  5. Real Time Search User Behavior Real time search is an increasingly important area of

    E-Print Network [OSTI]

    Jansen, James

    . The most frequently used terms accounted for only 0.03% of the total terms. Concerning search topics Web search. Searchers of real time content often repeat queries overtime, perhaps indicating long term content increasingly enters the main stream. Keywords Real time search, real time content, Collecta

  6. Approximate Response Time for Fixed Priority Real-Time Systems with Energy-Harvesting

    E-Print Network [OSTI]

    Boyer, Edmond

    Approximate Response Time for Fixed Priority Real-Time Systems with Energy-Harvesting Yasmina sufficient schedulability tests for fixed-priority pre-emptive scheduling of a real-time system under energy constraints. In this problem, energy is harvested from the ambient environment and used to replenish a storage

  7. Plasma Redshift, Time Dilation, and Supernovas Ia

    E-Print Network [OSTI]

    Ari Brynjolfsson

    2004-07-20T23:59:59.000Z

    The measurements of the absolute magnitudes and redshifts of supernovas Ia show that conventional physics, which includes plasma redshift, fully explains the observed magnitude-redshift relation of the supernovas. The only parameter that is required is the Hubble constant, which in principle can be measured independently. The contemporary theory of the expansion of the universe (Big Bang) requires in addition to the Hubble constant several adjustable parameters, such as an initial explosion, the dark matter parameter, and a time adjustable dark energy parameter for explaining the supernova Ia data. The contemporary Big Bang theory also requires time dilation of distant events as an inherent premise. The contention is usually that the light curves of distant supernovas show or even prove the time dilation. In the present article, we challenge this assertion. We document and show that the previously reported data in fact indicate that there is no time dilation. The data reported by Riess et al. in the Astrophysical Journal in June 2004 confirm the plasma redshift, the absence of time dilation, dark matter, and dark energy.

  8. Comparing Computer Run Time of Building Simulation Programs

    E-Print Network [OSTI]

    Hong, Tianzhen

    2008-01-01T23:59:59.000Z

    an approach to comparing computer run time of buildingthe purpose of comparing computer run time. Modelers shouldATIONAL L ABORATORY Comparing Computer Run Time of Building

  9. A Survey of Utility Experience with Real Time Pricing

    E-Print Network [OSTI]

    Barbose, Galen; Goldman, Charles; Neenan, Bernie

    2004-01-01T23:59:59.000Z

    Day Ahead Hourly Time of Use Tariff Description This is aTariff Name Real Time Pricing: Non-Residential Service Day Ahead Hourly Time of Use

  10. Real time gamma-ray signature identifier

    DOE Patents [OSTI]

    Rowland, Mark (Alamo, CA); Gosnell, Tom B. (Moraga, CA); Ham, Cheryl (Livermore, CA); Perkins, Dwight (Livermore, CA); Wong, James (Dublin, CA)

    2012-05-15T23:59:59.000Z

    A real time gamma-ray signature/source identification method and system using principal components analysis (PCA) for transforming and substantially reducing one or more comprehensive spectral libraries of nuclear materials types and configurations into a corresponding concise representation/signature(s) representing and indexing each individual predetermined spectrum in principal component (PC) space, wherein an unknown gamma-ray signature may be compared against the representative signature to find a match or at least characterize the unknown signature from among all the entries in the library with a single regression or simple projection into the PC space, so as to substantially reduce processing time and computing resources and enable real-time characterization and/or identification.

  11. Determinating Timing Channels in Statistically Multiplexed Clouds

    E-Print Network [OSTI]

    Aviram, Amittai; Ford, Bryan; Gummadi, Ramakrishna

    2010-01-01T23:59:59.000Z

    Timing side-channels represent an insidious security challenge for cloud computing, because: (a) they enable one customer to steal information from another without leaving a trail or raising alarms; (b) only the cloud provider can feasibly detect and report such attacks, but the provider's incentives are not to; and (c) known general-purpose timing channel control methods undermine statistical resource sharing efficiency, and, with it, the cloud computing business model. We propose a new cloud architecture that uses provider-enforced deterministic execution to eliminate all timing channels internal to a shared cloud domain, without limiting internal resource sharing. A prototype determinism-enforcing hypervisor demonstrates that utilizing such a cloud might be both convenient and efficient. The hypervisor enables parallel guest processes and threads to interact via familiar shared memory and file system abstractions, and runs moderately coarse-grained parallel tasks as efficiently and scalably as current nond...

  12. Continuous, real time microwave plasma element sensor

    DOE Patents [OSTI]

    Woskov, P.P.; Smatlak, D.L.; Cohn, D.R.; Wittle, J.K.; Titus, C.H.; Surma, J.E.

    1995-12-26T23:59:59.000Z

    Microwave-induced plasma is described for continuous, real time trace element monitoring under harsh and variable conditions. The sensor includes a source of high power microwave energy and a shorted waveguide made of a microwave conductive, refractory material communicating with the source of the microwave energy to generate a plasma. The high power waveguide is constructed to be robust in a hot, hostile environment. It includes an aperture for the passage of gases to be analyzed and a spectrometer is connected to receive light from the plasma. Provision is made for real time in situ calibration. The spectrometer disperses the light, which is then analyzed by a computer. The sensor is capable of making continuous, real time quantitative measurements of desired elements, such as the heavy metals lead and mercury. 3 figs.

  13. Time-delayed quantum feedback control

    E-Print Network [OSTI]

    Arne L. Grimsmo

    2015-02-24T23:59:59.000Z

    A theory of time-delayed coherent quantum feedback is developed. More specifically, we consider a quantum system coupled to a bosonic reservoir creating a unidirectional feedback loop. It is shown that the dynamics can be mapped onto a fictitious quantum cascade, where the system is driven by past versions of itself. The derivation of this model relies on a tensor network representation of the system-reservoir time-propagator. For concreteness, this general theory is applied to a driven two-level atom scattering into a coherent feedback loop. We demonstrate how delay effects can qualitatively change the dynamics of the atom, and how quantum control can be implemented in the presence of time-delays. A realization with a superconducting qubit serving as an artificial atom is discussed.

  14. Relaxation time of non-conformal plasma

    E-Print Network [OSTI]

    Alex Buchel

    2009-11-27T23:59:59.000Z

    We study effective relaxation time of viscous hydrodynamics of strongly coupled non-conformal gauge theory plasma using gauge theory/string theory correspondence. We compute leading corrections to the conformal plasma relaxation time from the relevant deformations due to dim-2 and dim-3 operators. We discuss in details the relaxation time tau_eff of N=2^* plasma. For a certain choice of masses this theory undergoes a phase transition with divergent specific heat c_V ~ |1-T_c/T|^(-1/2). Although the bulk viscosity remains finite all the way to the critical temperature, we find that tau_eff diverges near the critical point as tau_eff ~ |1-T_c/T|^(-1/2).

  15. Operational quantum theory without predefined time

    E-Print Network [OSTI]

    Ognyan Oreshkov; Nicolas J. Cerf

    2014-12-25T23:59:59.000Z

    The current operational formulation of quantum theory is based on the concept of operation with an input and an output system, which assumes a prior notion of time and is asymmetric under time reversal. But in certain contexts, such as those involving gravity, time is expected to be dynamical and not predefined. Here, we propose an operational formulation of quantum theory without any predefined notion of time. It is based on a generalization of the concept of operation motivated by an epistemic approach: an operation is a description of knowledge about the events in a given region, which can be updated conditionally on information obtained from that region. Each such region has a set of boundary systems, which by definition provide the sole means of information exchange between the events in the region and the events in other regions. Separate operations can be connected in networks through their boundary systems with no directionality assumed for the connections, which generalizes the standard circuit picture. The events associated with an operation are described by positive semidefinite operators on the Hilbert spaces of the boundary systems, while the connections between regions are described by entangled states that encode a nontrivial physical symmetry. A simple rule provides the joint probabilities for the events in a network of operations. We discuss how it may be possible to understand the emergence of a causal structure from properties of the operators on the boundaries of compact space-time regions. The framework allows for indefinite causal order, timelike loops, and other acausal structures. As part of this work, we obtain a generalization of Wigner's theorem, which is based on the preservation of probabilities of actual events and thus puts the concept of time reversal symmetry on operational grounds. It contains the possibility for a new class of symmetry transformations.

  16. Hyperpolarized Nanodiamond with Long Spin Relaxation Times

    E-Print Network [OSTI]

    Ewa Rej; Torsten Gaebel; Thomas Boele; David E. J. Waddington; David J. Reilly

    2015-02-22T23:59:59.000Z

    The use of hyperpolarized agents in magnetic resonance (MR), such as 13C-labeled compounds, enables powerful new imaging and detection modalities that stem from a 10,000-fold boost in signal. A major challenge for the future of the hyperpolarizaton technique is the inherently short spin relaxation times, typically solid-state environment, exhibit relaxation times exceeding 1 hour. Combined with the already established applications of NDs in the life-sciences as inexpensive fluorescent markers and non-cytotoxic substrates for gene and drug delivery, these results extend the theranostic capabilities of nanoscale diamonds into the domain of hyperpolarized MR.

  17. Short rise time intense electron beam generator

    DOE Patents [OSTI]

    Olson, C.L.

    1984-03-16T23:59:59.000Z

    A generator for producing an intense relativisitc electron beam having a subnanosecond current rise time includes a conventional generator of intense relativistic electrons feeding into a short electrically conductive drift tube including a cavity containing a working gas at a low enough pressure to prevent the input beam from significantly ionizing the working gas. Ionizing means such as a laser simultaneously ionize the entire volume of working gas in the cavity to generate an output beam having a rise time less than one nanosecond.

  18. Robustness of discrete-time control systems

    E-Print Network [OSTI]

    Aguirre, Gabriel

    1989-01-01T23:59:59.000Z

    . The Bilinear Approach s-Plane to z-Plane F. Overbounding and Testing for Stability G. Interlacing Properties of Interval Polynomials Interlacing Property for Continuous- Time Systems Interlacing Property for Discrete- Time Systems Page 26 27 29 33... of p(z) from F(+t) Calculation of s+q Calculation of s~i Calculation of the Minimum Distance of p(z) from P&? Calculation of s Calculation of s Calculation of the Minimum Distance of p(z) from Flsi Calculation of ss Calculation of ss E...

  19. Metamaterial model of a time crystal

    E-Print Network [OSTI]

    Smolyaninov, Igor I

    2015-01-01T23:59:59.000Z

    Propagation of monochromatic extraordinary light in a hyperbolic metamaterial is identical to propagation of massive particles in a three dimensional effective Minkowski spacetime, in which the role of a timelike variable is played by one of the spatial coordinates. We demonstrate that this analogy may be used to build a metamaterial model of a time crystal, which has been recently suggested by Wilczek and Shapere. It is interesting to note that the effective single-particle energy spectrum in such a model does not contain a static ground state, thus providing a loophole in the proof of time crystal non-existence by P. Bruno.

  20. Property:Event/Time | 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 Home5b9fcbce19 No revisionEnvReviewNonInvasiveExploration Jump to: navigation, searchEstimatedTimeMedian Jump to:Organizer JumpTime

  1. Statistical Characterization of GLONASS Broadcast Clock Errors and

    E-Print Network [OSTI]

    Stanford University

    Heng, Grace Xingxin Gao, Todd Walter, and Per Enge, Stanford University BIOGRAPHY Liang Heng is a Ph

  2. Microresonator frequency comb optical clock SCOTT B. PAPP,1,

    E-Print Network [OSTI]

    . http://dx.doi.org/10.1364/OPTICA.1.000010 1. INTRODUCTION Optical frequency combs enable extraordinary

  3. Expanding circadian input, output, and the clock through genomic screens

    E-Print Network [OSTI]

    Atwood, Ann Margaret

    2011-01-01T23:59:59.000Z

    of Philosophy in Biology by Ann Margaret Atwood Committee inSteven Wasserman Copyright Ann Margaret Atwood, 2011 Allreserved The Dissertation of Ann Margaret Atwood is approved

  4. ANALYSIS AND APPLICATION OF INDUCTANCE IN CLOCK DISTRIBUTION NETWORKS

    E-Print Network [OSTI]

    Hu, Xuchu

    2012-01-01T23:59:59.000Z

    Electromagnetic Interference . . . . . . . . . . . . . . .Systems and Electromagnetic Interference. John Wiley & Sons,A.1 On-chip Electromagnetic Interference EMI generated by

  5. Quantum key distribution with 1.25 Gbps clock synchronization

    E-Print Network [OSTI]

    , Jesse Wen Acadia Optronics LLC, 13401 Valley Drive, Rockville, MD 20850 Abstract: We have demonstrated

  6. arabidopsis circadian clock: Topics by E-print Network

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

    through evolution to increase the chances for survival by synchronizing to the daylight cycle. Reliable synchronization is realized through two trade-off properties:...

  7. ANALYSIS AND APPLICATION OF INDUCTANCE IN CLOCK DISTRIBUTION NETWORKS

    E-Print Network [OSTI]

    Hu, Xuchu

    2012-01-01T23:59:59.000Z

    in- ductor area with minimal power loss. . . . . . . .inductor area with minimal power loss. the inductors areonly compensate for the power loss instead of fully driving

  8. BY LAURA SPINNEY he land of chocolate and clocks could

    E-Print Network [OSTI]

    Napp, Nils

    ,arefactoringtheriskofatsunamiinLake Lucerne into their hazard plans. It is the first official acknowledgement of such a threat in Europe as magni- tude 6 occurs roughly every millennium around Lake Lucerne, for instance. The issue of tsunamis of tsunamis has also emerged for Lake Lucerne. Research by Flavio Anselmetti, a geologist at the University of

  9. Expanding circadian input, output, and the clock through genomic screens

    E-Print Network [OSTI]

    Atwood, Ann Margaret

    2011-01-01T23:59:59.000Z

    Category Term # Genes SP_PIR_KEYWORDS biological rhythmsCategory Term # Genes SP_PIR_KEYWORDS nucleus 2.8475E-09transcription) 4.1293E-07 SP_PIR_KEYWORDS transcription

  10. Towards quantum telecommunication and a Thorium nuclear clock.

    E-Print Network [OSTI]

    Radnaev, Alexander G.

    2012-01-01T23:59:59.000Z

    ??This thesis presents the investigations of Rubidium atoms in magneto-optical traps and triply charged Thorium ions in electrodynamic traps for future advances in long-distance quantum… (more)

  11. The butterfly clock : illuminating the molecular mysteries of monarch migration

    E-Print Network [OSTI]

    Rice, Jocelyn

    2007-01-01T23:59:59.000Z

    Each fall, the entire monarch butterfly population of the Eastern United States and Canada funnels into a handful of oyamel pine groves in Michoacan, Mexico, to weather the winter months. Each spring, the butterflies mate ...

  12. Spoofing GPS Receiver Clock Offset of Phasor Measurement Units

    E-Print Network [OSTI]

    Liberzon, Daniel

    satellites and decoding their data, the GPS receiver of a PMU estimates its own position and the offset the feasibility of a spoofing attack on the GPS receiver of a Phasor Measurement Unit (PMU). We formulate the attack as an optimization problem where the objective is to maximize the difference between the PMU

  13. Novel Phase-Coherent Programmable Clock - Energy Innovation Portal

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions andDataNationalNewportBig Eddyof H-2Novel

  14. Variation and power issues in VLSI clock networks

    E-Print Network [OSTI]

    Venkataraman, Ganesh

    2009-05-15T23:59:59.000Z

    35932. . . . . . . . . . . . . . . . . 93 22 Simple example for mesh reduction. . . . . . . . . . . . . . . . . . . . 95 23 Greedy mesh reduction. . . . . . . . . . . . . . . . . . . . . . . . . . 97 24 Post processing after mesh reduction...-flop placement depends on skew optimization while it is well known that skew optimization depends on flip-flop lo- cations. This is quite different from traditional intentional skew designs where the placement does not depend on skew optimization. We make...

  15. Clock Award Recipients Department of Art and Art History

    E-Print Network [OSTI]

    Texas at Austin, University of

    . Agham-Bayan Posadas Orrin Shindell Anderson Trimm Department of Psychology Adam Cobb Dr. Lauretta Reeves Ferguson Sharon Lee Dr. Mary Velasquez Dr. Christopher Salas-Wright Jennifer Scott Sarah Sloan Julie Speir Laura Swan Dr. Calvin Streeter Dean of Students-Student Emergency Services Krista Anderson Division

  16. The Lithium Depletion Boundary as a Clock and Thermometer

    E-Print Network [OSTI]

    R. D. Jeffries; T. Naylor

    2000-09-12T23:59:59.000Z

    We take a critical look at the lithium depletion boundary (LDB) technique that has recently been used to derive the ages of open clusters. We identify the sources of experimental and systematic error and show that the probable errors are larger by approximately a factor two than presently claimed in the literature. We then use the Pleiades LDB age and photometry in combination with evolutionary models to define empirical colour-T_eff relations that can be applied to younger clusters. We find that these relationships DO NOT produce model isochrones that match the younger cluster data. We propose that this is due either to systematic problems in the evolutionary models or an age (gravity) sensitivity in the colour-T_eff relation which is not present in published atmospheric models.

  17. Short- and Long- Time Transport Structures in a Three Dimensional Time Dependent Flow

    E-Print Network [OSTI]

    Chabreyrie, Rodolphe

    2014-01-01T23:59:59.000Z

    Lagrangian transport structures for three-dimensional and time-dependent fluid flows are of great interest in numerous applications, particularly for geophysical or oceanic flows. In such flows, chaotic transport and mixing can play important environmental and ecological roles, for examples in pollution spills or plankton migration. In such flows, where simulations or observations are typically available only over a short time, understanding the difference between short-time and long-time transport structures is critical. In this paper, we use a set of classical (i.e. Poincar\\'e section, Lyapunov exponent) and alternative (i.e. finite time Lyapunov exponent, Lagrangian coherent structures) tools from dynamical systems theory that analyze chaotic transport both qualitatively and quantitatively. With this set of tools we are able to reveal, identify and highlight differences between short- and long-time transport structures inside a flow composed of a primary horizontal contra-rotating vortex chain, small later...

  18. Comparison of Test Procedures and Energy Efficiency Criteria in Selected International Standards and Labeling Programs for Clothes Washers, Water Dispensers, Vending Machines and CFLs

    E-Print Network [OSTI]

    Fridley, David

    2010-01-01T23:59:59.000Z

    Appliance Manufacturers (AHAM), and Japan’s own JIS C 9606The U.S. test procedure (AHAM HWL-1) does not include a washAppliance Manufacturers (AHAM) HWL-1 Cold Water: 60 ± 5?F (

  19. Comparison of Test Procedures and Energy Efficiency Criteria in Selected International Standards and Labeling Programs for Clothes Washers, Water Dispensers, Vending Machines and CFLs

    E-Print Network [OSTI]

    Fridley, David

    2010-01-01T23:59:59.000Z

    top_runner//tr_fluorescent_light_bulb_jul.2009.pdf NiskinSubcommittee Final Report (bulb type fluorescent lamp). ”Fluorescent Lamps (CFLs) are an efficient lighting alternative to traditional incandescent light bulbs

  20. Comparison of Test Procedures and Energy Efficiency Criteria in Selected International Standards and Labeling Programs for Clothes Washers, Water Dispensers, Vending Machines and CFLs

    E-Print Network [OSTI]

    Fridley, David

    2010-01-01T23:59:59.000Z

    kWh/yr) ASHRAE Std. 32.1-2004 Solid/Opaque: 90 ± 2?F (32.2 ±ASHRAE Std. 32.1-2004 Indoor: 75 ± 2?F (23.9 ±1?C); Outdoor: 90

  1. Metastring Theory and Modular Space-time

    E-Print Network [OSTI]

    Freidel, Laurent; Minic, Djordje

    2015-01-01T23:59:59.000Z

    String theory is canonically accompanied with a space-time interpretation which determines S-matrix-like observables, and connects to the standard physics at low energies in the guise of local effective field theory. Recently, we have introduced a reformulation of string theory which does not rely on an {\\it a priori} space-time interpretation or a pre-assumption of locality. This \\hlt{metastring theory} is formulated in such a way that stringy symmetries (such as T-duality) are realized linearly. In this paper, we study metastring theory on a flat background and develop a variety of technical and interpretational ideas. These include a formulation of the moduli space of Lorentzian worldsheets, a careful study of the symplectic structure and consequently consistent closed and open boundary conditions, and the string spectrum and operator algebra. What emerges from these studies is a new quantum notion of space-time that we refer to as a quantum Lagrangian or equivalently a \\hlt{modular space-time}. This conce...

  2. Run-Time Library Routines Reference

    E-Print Network [OSTI]

    California at San Diego, University of

    MDS Run-Time Library Routines Reference Manual February 1993 Software Version: MDS 5.2 VAX.S.A. The following are trademarks of Digitial Equipment Corporation: CDD DECnet VAX DATATRIEVE DECUS VAXcluster DEC MicroVAX VAX Information Architecture DEC/CMS MicroVMS VMS DEC/MMS Rdb/VMS VT IDL (Interactive Data

  3. SAMPLE: software for VAX FORTRAN execution timing

    SciTech Connect (OSTI)

    Lowe, L.H.

    1983-01-01T23:59:59.000Z

    SAMPLE is a set of subroutines in use at the Los Alamos National Laboratory for collecting CPU timings of various FORTRAN program sections - usually individual subroutines. These measurements have been useful in making programs run faster. The presentation includes a description of the software and examples of its use. The software is available on the directory (SAMPLE) of the VAX SIG tape.

  4. Real Time Grid Reliability Management 2005

    SciTech Connect (OSTI)

    Eto, Joe; Eto, Joe; Lesieutre, Bernard; Lewis, Nancy Jo; Parashar, Manu

    2008-07-07T23:59:59.000Z

    The increased need to manage California?s electricity grid in real time is a result of the ongoing transition from a system operated by vertically-integrated utilities serving native loads to one operated by an independent system operator supporting competitive energy markets. During this transition period, the traditional approach to reliability management -- construction of new transmission lines -- has not been pursued due to unresolved issues related to the financing and recovery of transmission project costs. In the absence of investments in new transmission infrastructure, the best strategy for managing reliability is to equip system operators with better real-time information about actual operating margins so that they can better understand and manage the risk of operating closer to the edge. A companion strategy is to address known deficiencies in offline modeling tools that are needed to ground the use of improved real-time tools. This project: (1) developed and conducted first-ever demonstrations of two prototype real-time software tools for voltage security assessment and phasor monitoring; and (2) prepared a scoping study on improving load and generator response models. Additional funding through two separate subsequent work authorizations has already been provided to build upon the work initiated in this project.

  5. Arnold Schwarzenegger REAL-TIME GRID RELIABILITY

    E-Print Network [OSTI]

    Arnold Schwarzenegger Governor REAL-TIME GRID RELIABILITY MANAGEMENT Scoping Study Report Reliability Technology Solutions APPENDIXG October 2008 CEC-500-2008-049-APG #12;#12;Prepared By: Lawrence for Electric Reliability Technology Solutions and was funded by the California Energy Commission's Public

  6. Arnold Schwarzenegger REAL-TIME GRID RELIABILITY

    E-Print Network [OSTI]

    Arnold Schwarzenegger Governor REAL-TIME GRID RELIABILITY MANAGEMENT Prototype Phasor-Based Real Research Program Prepared By: Lawrence Berkeley National Laboratory Consortium for Electric Reliability in this report. #12;#12;USER GUIDE Version 3 August 2005 Prepared by: for Consortium for Electric Reliability

  7. ccsd00001476, NEGATIVE ENERGIES AND TIME REVERSAL

    E-Print Network [OSTI]

    kinetic energy, so-called phantom #12;elds, have recently been proposed [1] [2] [3] as new sources leadingccsd­00001476, version 6 ­ 31 Mar 2005 NEGATIVE ENERGIES AND TIME REVERSAL IN QUANTUM FIELD THEORY The theoretical and phenomenological status of negative energies is reviewed in Quantum Field Theory leading

  8. Does Daylight Savings Time Affect Traffic Accidents?

    E-Print Network [OSTI]

    Deen, Sophia 1988-

    2012-04-20T23:59:59.000Z

    This paper studies the effect of changes in accident pattern due to Daylight Savings Time (DST). The extension of the DST in 2007 provides a natural experiment to determine whether the number of traffic accidents is affected by shifts in hours...

  9. Quantum mechanics and the direction of time

    SciTech Connect (OSTI)

    Hasegawa, H.; Petrosky, T. (Univ. of Texas, Austin (United States)); Prigogine, I. (Univ. of Texas, Austin (United States) International Solvay Inst. for Physics and Chemistry, Brussels (Belgium)); Tasaki, S. (International Solvay Inst. for Physics and Chemistry, Brussels (Belgium))

    1991-03-01T23:59:59.000Z

    In recent papers the authors have discussed the dynamical properties of large Poincare systems (LPS), that is, nonintegrable systems with a continuous spectrum (both classical and quantum). An interesting example of LPS is given by the Friedrichs model of field theory. As is well known, perturbation methods analytic in the coupling constant diverge because of resonant denominators. They show that this Poincare catastrophe can be eliminated by a natural time ordering of the dynamical states. They obtain then a dynamical theory which incorporates a privileged direction of time (and therefore the second law of thermodynamics). However, it is only in very simple situations that his time ordering can be performed in an extended Hilbert space. In general, they need to go to the Liouville space (superspace) and introduce a time ordering of dynamical states according to the number of particles involved in correlations. This leads then to a generalization of quantum mechanics in which the usual Heisenberg's eigenvalue problem is replaced by a complex eigenvalue problem in the Liouville space.

  10. PROTECTING INFRASTRUCTURE ASSETS FROM REAL-TIME

    E-Print Network [OSTI]

    Burmester, Mike

    be used to protect communications of an IEC61850-90-5-compliant substation automation system in an electricity grid. Also, it discusses the impact of run-time attacks on TC-compliant critical infrastructure The Stuxnet worm has demonstrated the effectiveness of cyber attacks on industrial facilities. The potentially

  11. Chapter 19 Subjunctive Conditionals And Time's Arrow

    E-Print Network [OSTI]

    Fitelson, Branden

    the Arrow of Time Bennett's account of subjunctive conditionals is based on Lewis's. However explain temporal asymmetry, the difference between past and future. Although Bennett uses the blanket term if there is a chain of counter-factual dependencies of this sort which connects A and C. Bennett adds that for Lewis

  12. Time Series Models: Hidden Markov Models

    E-Print Network [OSTI]

    Roweis, Sam

    Time Series Models: Hidden Markov Models & Linear Dynamical Systems Sam Roweis Gatsby Computational before. Discrete state: { Moore and Mealy machines (engineering) { stochastic #12;nite state automata (CS chain with stochastic measurements. Gauss-Markov process in a pancake. PSfrag replacements x 1 y 1 x 2 y

  13. Time Series Models: Hidden Markov Models

    E-Print Network [OSTI]

    Roweis, Sam

    Time Series Models: Hidden Markov Models & Linear Dynamical Systems Sam Roweis Gatsby Computational. Discrete state: { Moore and Mealy machines (engineering) { stochastic #12;nite state automata (CS with stochastic measurements. Gauss-Markov process in a pancake. PSfrag replacements x 1 y 1 x 2 y 2 x 3 y 3 x T y

  14. Protist Web Alert Memories of Times Past

    E-Print Network [OSTI]

    Simpson, Larry

    Protist Web Alert Memories of Times Past The Euglenoid Project (http that the Euglenoids have always fascinated me and so did this site. Micro*scope Astrobiology Institute Web Site from reviewed this site in a previous Web Alert, but it has been revised and updated and so is worth another

  15. Causation, Regularities, and Time: Hume's Theory

    E-Print Network [OSTI]

    Fitelson, Branden

    that there is more to causation than regularity, contiguity, and time order. Hume claims to clarify the content of our "ideas" (mental contents) and of the relations among them, and he does not clearly demarcate that nonlogical terms have meaning only if one can tell by observation whether they apply to things

  16. OF HEALTH CARE IN TURBULENT TIMES

    E-Print Network [OSTI]

    Feschotte, Cedric

    FIXING THE FLOW OF HEALTH CARE IN TURBULENT TIMES INNOVATION REPORT 2014 #12;Since 2012, Algorithms facing health care today. We believe there's an unprecedented opportunity to invent a new vision for health care, and academic medicine is poised to lead the way. Algorithms for Innovations is designed

  17. http://tas.sagepub.com Time & Society

    E-Print Network [OSTI]

    Rosters on Employee Work and Non-Work http://tas.sagepub.com/cgi/content/abstract/12/2-3/315 The online and Non-work Time Preferences Angela Baker, Gregory Roach, Sally Ferguson and Drew Dawson ABSTRACT 24, 2010http://tas.sagepub.comDownloaded from #12;The Impact of Different Rosters on Employee Work

  18. Computing Needs Time Edward A. Lee

    E-Print Network [OSTI]

    (CSR-CPS)), the U. S. Army Research Office (ARO #W911NF-07-2-0019), the U. S. Air Force Office essential prop- erties of the physical systems, most particularly the passage of time. It makes a case (CSR-CPS)), the U. S. Army Research Office (ARO #W911NF-07-2-0019), the U. S. Air Force Office

  19. Business Day Authoritative, informative and timely,

    E-Print Network [OSTI]

    Peters, Richard

    Overview #12;Business Day Overview Authoritative, informative and timely, Business Day is a must read for business decision-makers. Business Day has Australia's most influential business writers and commentators who provide up-to-the- minute business news, including context, background and specialist analysis

  20. Hybrid Abstractions that Preserve Timed Languages

    E-Print Network [OSTI]

    Pappas, George J.

    Hybrid Abstractions that Preserve Timed Languages Paulo Tabuada1 and George J. Pappas2 1 Instituto@ee.upenn.edu Abstract. In this paper we consider the problem of extracting an ab- straction from a hybrid control system that determine when trajectories of the original hybrid system can be generated by the abstracted hybrid system

  1. Northern Kentucky University PART-TIME FACULTY

    E-Print Network [OSTI]

    Boyce, Richard L.

    Northern Kentucky University HANDBOOK FOR PART-TIME FACULTY #12;THE UNIVERSITY History Northern Kentucky University, the newest of Kentucky's eight state universities, was founded in 1968. However of the University of Kentucky was located in the First District Elementary School in Covington. Then, as Northern

  2. Segmenting Time Series for Weather Forecasting

    E-Print Network [OSTI]

    Sripada, Yaji

    ) models is summarised as weather forecast texts. In the domain of gas turbines, sensor data from an operational gas turbine is summarised for the maintenance engineers. More details on SUMTIME have been to develop a generic model for summarisation of time series data. Initially, we have applied standard

  3. Space-time attributes of physical objects and the laws of space-time physics

    E-Print Network [OSTI]

    J. H. Field

    2008-09-24T23:59:59.000Z

    Physical time intervals are attributes of single physical object whereas physical space intervals are a relational attribute of two physical objects. Some consequences of the breaking of the space-time exchange symmetry inherent in the Lorentz transformation following from the above distinction are investigated. In particular, it is shown that the relativity of simultaneity and length contraction effects which naively follow from space-time symmetry of the Lorentz transformation do not occur. Seven laws describing the relation between observations of space intervals, time intervals and velocities in different reference frames are given. Only two of these laws are respected by conventional special relativity theory.

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

    SciTech Connect (OSTI)

    Zhang, Chi, E-mail: chizheung@gmail.com; Xu, Yiqing; Wei, Xiaoming; Tsia, Kevin K.; Wong, Kenneth K. Y., E-mail: kywong@eee.hku.hk [Photonic Systems Research Laboratory, Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road (Hong Kong)

    2014-07-28T23:59:59.000Z

    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.

  5. Time lapse HDR: time lapse photography with high dynamic range images

    E-Print Network [OSTI]

    Clark, Brian Sean

    2005-08-29T23:59:59.000Z

    TIME LAPSE HDR: TIME LAPSE PHOTOGRAPHY WITH HIGH DYNAMIC RANGE IMAGES A Thesis by BRIAN CLARK Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 2005... Major Subject: Visualization Sciences TIME LAPSE HDR: TIME LAPSE PHOTOGRAPHY WITH HIGH DYNAMIC RAGE IMAGES A Thesis by BRIAN CLARK Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved...

  6. Timing analysis of PWR fuel pin failures

    SciTech Connect (OSTI)

    Jones, K.R.; Wade, N.L.; Katsma, K.R.; Siefken, L.J. (EG and G Idaho, Inc., Idaho Falls, ID (United States)); Straka, M. (Halliburton NUS, Idaho Falls, ID (United States))

    1992-09-01T23:59:59.000Z

    This report discusses research conducted to develop and demonstrate a methodology for calculation of the time interval between receipt of the containment isolation signals and the first fuel pin failure for loss-of-coolant accidents (LOCAs). Demonstration calculations were performed for a Babcock and Wilcox (B W) design (Oconee) and a Westinghouse (W) four-loop design (Seabrook). Sensitivity studies were performed to assess the impacts of fuel pin burnup, axial peaking factor, break size, emergency core cooling system availability, and main coolant pump trip on these times. The analysis was performed using the following codes: FRAPCON-2, for the calculation of steady-state fuel behavior; SCDAP/RELAP5/MOD3 and TRACPF1/MOD1, for the calculation of the transient thermal-hydraulic conditions in the reactor system; and FRAP-T6, for the calculation of transient fuel behavior. In addition to the calculation of fuel pin failure timing, this analysis provides a comparison of the predicted results of SCDAP/RELAP5/MOD3 and TRAC-PF1/MOD1 for large-break LOCA analysis. Using SCDAP/RELAP5/MOD3 thermal-hydraulic data, the shortest time intervals calculated between initiation of containment isolation and fuel pin failure are 10.4 seconds and 19.1 seconds for the B W and W plants, respectively. Using data generated by TRAC-PF1/MOD1, the shortest intervals are 10.3 seconds and 29.1 seconds for the B W and W plants, respectively. These intervals are for a double-ended, offset-shear, cold leg break, using the technical specification maximum peaking factor and applied to fuel with maximum design burnup. Using peaking factors commensurate with actual burnups would result in longer intervals for both reactor designs. This document provides appendices K and L of this report which provide plots for the timing analysis of PWR fuel pin failures for Oconee and Seabrook respectively.

  7. Improving Door-to-balloon Time by Decreasing Door-to-ECG time for Walk-in STEMI Patients

    E-Print Network [OSTI]

    2015-01-01T23:59:59.000Z

    JD, Lindsell CJ, et al. Door-to-ECG time in patients QualTime by Decreasing Door-to-ECG time for Walk-in STEMIto-electrocardiography (ECG) times for patients with ST-

  8. Can biomass time series be reliably assessed from CPUE time series data Francis Lalo1

    E-Print Network [OSTI]

    Hawai'i at Manoa, University of

    1 Can biomass time series be reliably assessed from CPUE time series data only? Francis Laloë1 to abundance. This means (i) that catchability is constant and (ii) that all the biomass is catchable. If so, relative variations in CPUE indicate the same relative variations in biomass. Myers and Worm consider

  9. REAL-TIME DISPATCHING OF GUIDED AND UNGUIDED AUTOMOBILE SERVICE UNITS WITH SOFT TIME WINDOWS

    E-Print Network [OSTI]

    Krumke, Sven O.

    REAL-TIME DISPATCHING OF GUIDED AND UNGUIDED AUTOMOBILE SERVICE UNITS WITH SOFT TIME WINDOWS SVEN O that are no worse than 1% from optimum on state-of-the-art personal computers. 1. INTRODUCTION The German Automobile Association ADAC (Allgemeiner Deutscher Automobil- Club), the second largest automobile club worldwide

  10. Time-varying Reeb Graphs for Continuous Space-Time Data Herbert Edelsbrunner

    E-Print Network [OSTI]

    Pascucci, Valerio

    and/or a fee. SOCG '04 New York City, New York USA Copyright 2004 ACM ?? . . . $4.99. of dataTime-varying Reeb Graphs for Continuous Space-Time Data Herbert Edelsbrunner , John Harer , Ajith the evolving sequence into a single, partially persistent data structure. We envision this data structure

  11. 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

  12. All Regular Part-Time and Temporary Full-Time Employees

    E-Print Network [OSTI]

    contains important information and should be kept in a safe place known to you and your family. The Plan is underwritten by #12;Protecting Your Personal Information At Great-West Life, we recognize and respectAll Regular Part-Time and Temporary Full-Time Employees #12;Great-West Life is a leading Canadian

  13. Seismic Response Analysis of Different Buildings using Time-Invariant and Time-Variant Damping Coefficients

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Seismic Response Analysis of Different Buildings using Time- Invariant and Time- Variant Damping@obs.ujf-grenoble.fr Abstract Seismic signals are characterized by strong excitations, short durations, non-linearity and non has been introduced to help in adapting to the seismic signals where the amplitude is damped

  14. Timing discriminator using leading-edge extrapolation

    DOE Patents [OSTI]

    Gottschalk, B.

    1981-07-30T23:59:59.000Z

    A discriminator circuit to recover timing information from slow-rising pulses by means of an output trailing edge, a fixed time after the starting corner of the input pulse, which is nearly independent of risetime and threshold setting is described. This apparatus comprises means for comparing pulses with a threshold voltage; a capacitor to be charged at a certain rate when the input signal is one-third threshold voltage, and at a lower rate when the input signal is two-thirds threshold voltage; current-generating means for charging the capacitor; means for comparing voltage capacitor with a bias voltage; a flip-flop to be set when the input pulse reaches threshold voltage and reset when capacitor voltage reaches the bias voltage; and a clamping means for discharging the capacitor when the input signal returns below one-third threshold voltage.

  15. Time-scale for accretion of matter

    E-Print Network [OSTI]

    F. Combes

    1998-11-09T23:59:59.000Z

    Mass accretion is the key factor for evolution of galaxies. It can occur through secular evolution, when gas in the outer parts is driven inwards by dynamical instabilities, such as spirals or bars. This secular evolution proceeds very slowly when spontaneous, and can be accelerated when triggered by companions. Accretion can also occur directly through merging of small companions, or more violent interaction and coalescence. We discuss the relative importance of both processes, their time-scale and frequency along a Hubble time. Signatures of both processes can be found in the Milky Way. It is however likely that our Galaxy had already gathered the bulk of its mass about 8-10 Gyr ago, as is expected in hierarchical galaxy formation scenarios.

  16. Visualizations for Real-time Pricing Demonstration

    SciTech Connect (OSTI)

    Marinovici, Maria C.; Hammerstrom, Janelle L.; Widergren, Steven E.; Dayley, Greg K.

    2014-10-13T23:59:59.000Z

    In this paper, the visualization tools created for monitoring the operations of a real-time pricing demonstration system that runs at a distribution feeder level are presented. The information these tools provide gives insights into demand behavior from automated price responsive devices, distribution feeder characteristics, impact of weather on system’s development, and other significant dynamics. Given the large number of devices that bid into a feeder-level real-time electricity market, new techniques are explored to summarize the present state of the system and contrast that with previous trends as well as future projections. To better understand the system behavior and correctly inform decision-making procedures, effective visualization of the data is imperative.

  17. Weyl's principle, cosmic time and quantum fundamentalism

    E-Print Network [OSTI]

    Svend E. Rugh; Henrik Zinkernagel

    2010-06-30T23:59:59.000Z

    We examine the necessary physical underpinnings for setting up the cosmological standard model with a global cosmic time parameter. In particular, we discuss the role of Weyl's principle which asserts that cosmic matter moves according to certain regularity requirements. After a brief historical introduction to Weyl's principle we argue that although the principle is often not explicitly mentioned in modern standard texts on cosmology, it is implicitly assumed and is, in fact, necessary for a physically well-defined notion of cosmic time. We finally point out that Weyl's principle might be in conflict with the wide-spread idea that the universe at some very early stage can be described exclusively in terms of quantum theory.

  18. Weyl's principle, cosmic time and quantum fundamentalism

    E-Print Network [OSTI]

    Rugh, Svend E

    2010-01-01T23:59:59.000Z

    We examine the necessary physical underpinnings for setting up the cosmological standard model with a global cosmic time parameter. In particular, we discuss the role of Weyl's principle which asserts that cosmic matter moves according to certain regularity requirements. After a brief historical introduction to Weyl's principle we argue that although the principle is often not explicitly mentioned in modern standard texts on cosmology, it is implicitly assumed and is, in fact, necessary for a physically well-defined notion of cosmic time. We finally point out that Weyl's principle might be in conflict with the wide-spread idea that the universe at some very early stage can be described exclusively in terms of quantum theory.

  19. Direct observation of time reversal violation

    SciTech Connect (OSTI)

    Bernabeu, J. [Department of Theoretical Physics, University of Valencia, and IFIC, Joint Centre Univ. Valencia-CSIC (Spain)

    2013-06-12T23:59:59.000Z

    A direct evidence for Time Reversal Violation (TRV) means an experiment that, considered by itself, clearly shows TRV independent of, and unconnected to, the results for CP Violation. No existing result before the recent BABAR experiment with entangled neutral B mesons had demonstrated TRV in this sense. There is a unique opportunity for a search of TRV with unstable particles thanks to the Einstein-Podolsky-Rosen (EPR) Entanglement between the two neutral mesons in B, and PHI, Factories. The two quantum effects of the first decay as a filtering measurement and the transfer of information to the still living partner allow performing a genuine TRV asymmetry with the exchange of 'in' and 'out' states. With four independent TRV asymmetries, BABAR observes a large deviation of T-invariance with a statistical significance of 14 standard deviations, far more than needed to declare the result as a discovery. This is the first direct observation of TRV in the time evolution of any system.

  20. Merging electromagnetism with space-time metric

    E-Print Network [OSTI]

    C. A. Duarte

    2014-03-10T23:59:59.000Z

    In the present work, it is shown that the electromagnetism may be directly associated to the four-dimensional space-time geometry. The starting point is an analysis of the geodesic equation of general relativity where it is verified that it contains implicitly the effects of the Coulomb and the Lorentz forces. Consequently, some components of the metric tensor are identified with the components of the four-vector electromagnetic potential. Then, it is constructed a low-field equation for the electromagnetism in the same structure of the Einstein field equations for the gravitation, relating the curvature of space-time to sources of charge and current density. In this framework, all the Maxwell equations are implicit. A proof of consistency with the framework of quantum mechanics is shown.