Time to Start Getting Ready for Cori
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), 2002; Level:5(Million Cubic Feet) Oregon (Including Vehicle Fuel) (MillionStructural Basis of WntSupportB 18B()The57 Please note that3 IrimpanTime to Start Getting
Wisconsin at Madison, University of
Modes ALS Primary Section BIOLOGICAL SYSTEMS ENGINEERING Office of the Registrar Curricular Services 12 of delivery and any other key information for students. #12;Sess Code Subject Catalog# Class Sect Start Time: Sections with Distance Education Instruction Modes ALS Primary Section DAIRY SCIENCE Office
Wisconsin at Madison, University of
Modes ALS Primary Section BIOLOGICAL SYSTEMS ENGINEERING Office of the Registrar Curricular Services 10 of delivery and any other key information for students. #12;Sess Code Subject Catalog# Class Sect Start Time: Sections with Distance Education Instruction Modes ALS Primary Section DAIRY SCIENCE Office
Using myPublications for the first time How do I get started?
Oakley, Jeremy
;Using myPublications for the first time v4 2 Review your search terms Before reviewing any pending outputs, you should take five minutes to review your search terms. This is the criteria that my databases unless these are separated from the default search terms. The most common changes that need
Time Commitments Where Does Your Time Go
Kunkle, Tom
Time Commitments Where Does Your Time Go Everyone starts the week with the same number of hours. So, why does your time go so fast? Let's find out! Number of hours of sleep each night ____ x 7 preparation/clean-up time) ____ x 7 = ____ Travel time to and from campus ___ x __ = ____ Number of hours per
Burra G. Sidharth
2008-09-03T23:59:59.000Z
We briefly review two concepts of time - the usual time associated with "being" and more recent ideas, answering to the description of "becoming". The approximation involved in the former is examined. Finally we argue that it is (unpredictable) fluctuations that underlie time.
John Ashmead
2010-05-05T23:59:59.000Z
Normally we quantize along the space dimensions but treat time classically. But from relativity we expect a high level of symmetry between time and space. What happens if we quantize time using the same rules we use to quantize space? To do this, we generalize the paths in the Feynman path integral to include paths that vary in time as well as in space. We use Morlet wavelet decomposition to ensure convergence and normalization of the path integrals. We derive the Schr\\"odinger equation in four dimensions from the short time limit of the path integral expression. We verify that we recover standard quantum theory in the non-relativistic, semi-classical, and long time limits. Quantum time is an experiment factory: most foundational experiments in quantum mechanics can be modified in a way that makes them tests of quantum time. We look at single and double slits in time, scattering by time-varying electric and magnetic fields, and the Aharonov-Bohm effect in time.
Noncommutative Two Time Physics
W. Chagas-Filho
2006-05-10T23:59:59.000Z
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.
Abreu, Gabriel
2010-01-01T23:59:59.000Z
In a general time-dependent (3+1)-dimensional spherically symmetric spacetime, the so-called Kodama vector is a naturally defined geometric quantity that is timelike outside the evolving horizon and so defines a preferred class of fiducial observers. However the Kodama vector does not by itself define any preferred notion of time. We demonstrate that a preferred time coordinate - which we shall call Kodama time - can be introduced by taking the additional step of applying the Clebsch decomposition theorem to the Kodama vector. We thus construct a geometrically preferred coordinate system for any time-dependent spherically symmetric spacetime, and explore its properties. In particular we use this formalism to construct a general class of conservation laws, generalizing Kodama's energy flux. We study the geometrically preferred fiducial observers, and demonstrate that it is possible to define and calculate a generalized notion of surface gravity that is valid throughout the entire evolving spacetime. Furthermor...
Giovannetti, Vittorio
We give a consistent quantum description of time, based on Page and Wootterss conditional probabilities mechanism, which overcomes the criticisms that were raised against similar previous proposals. In particular we show ...
Unknown
2011-09-05T23:59:59.000Z
-1 THE PREDICTION OF BUS ARRIVAL TIME USING AUTOMATIC VEHICLE LOCATION SYSTEMS DATA A Dissertation by RAN HEE JEONG Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of DOCTOR OF PHILOSOPHY December 2004 Major Subject: Civil Engineering THE PREDICTION OF BUS ARRIVAL TIME USING AUTOMATIC VEHICLE LOCATION SYSTEMS DATA A Dissertation by RAN HEE JEONG Submitted to Texas A...
Haase, Markus
pressure is the ambient pressure minus the water vapor pressure (Buhlmann value) times the fraction or descents): P = Po + (Pi - Po)(1 - e^-kt) which states that P, the final partial pressure in a given compartment (as a function of time), will be the initital partial pressure, Po, plus (or minus
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), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirtA Journey InsideMicroBooNE LArTPC Sarah Lockwitz, FNAL 2013 DPFTheses 2014No.7 D I STime Off Time Off A
Dispatch R427 Time perception: Brain time or event time?
Johnston, Alan
Dispatch R427 Time perception: Brain time or event time? Alan Johnston* and Shin'ya Nishida Recent experiments show that synchronous events can appear to an observer to occur at different times. Neural processing time delays are offered as an explanation of these temporal illusions, but equating perceived time
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.
Time Management Managing Time and Tasks
Kunkle, Tom
Time Management Managing Time and Tasks What is time management? Time can't be managed but you can manage the amount of time you use each day for fun, work, rest, and time spent with others. Why is time management important? You have responsibilities to yourself, to your family and friends, to your
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
UGE Scheduler Cycle Time UGE Scheduler Cycle Time Genepool Cycle Time Genepool Daily Genepool Weekly Phoebe Cycle Time Phoebe Daily Phoebe Weekly What is the Scheduler Cycle? The...
Time Crystals from Minimum Time Uncertainty
Mir Faizal; Mohammed M. Khalil; Saurya Das
2014-12-29T23:59:59.000Z
Motivated by the Generalized Uncertainty Principle, covariance, and a minimum measurable time, we propose a deformation of the Heisenberg algebra, and show that this leads to corrections to all quantum mechanical systems. We also demonstrate that such a deformation implies a discrete spectrum for time. In other words, time behaves like a crystal.
Space time and the passage of time
George F. R. Ellis; Rituparno Goswami
2012-08-26T23:59:59.000Z
This paper examines the various arguments that have been put forward suggesting either that time does not exist, or that it exists but its flow is not real. I argue that (i) time both exists and flows; (ii) an Evolving Block Universe (`EBU') model of spacetime adequately captures this feature, emphasizing the key differences between the past, present, and future; (iii) the associated surfaces of constant time are uniquely geometrically and physically determined in any realistic spacetime model based in General Relativity Theory; (iv) such a model is needed in order to capture the essential aspects of what is happening in circumstances where initial data does not uniquely determine the evolution of spacetime structure because quantum uncertainty plays a key role in that development. Assuming that the functioning of the mind is based in the physical brain, evidence from the way that the mind apprehends the flow of time prefers this evolving time model over those where there is no flow of time.
On Time. 6b: Quantum Mechanical Time
C. K. Raju
2008-08-09T23:59:59.000Z
The existence of small amounts of advanced radiation, or a tilt in the arrow of time, makes the basic equations of physics mixed-type functional differential equations. The novel features of such equations point to a microphysical structure of time. This corresponds to a change of logic at the microphysical level. We show that the resulting logic is a quantum logic. This provides a natural and rigorous explanation of quantum interference. This structured-time interpretation of quantum mechanics is briefly compared with various other interpretations of q.m.
Guenter Nimtz
2009-01-26T23:59:59.000Z
How much time does a tunneling wave packet spent in traversing a barrier? Quantum mechanical calculations result in zero time inside a barrier . In the nineties analogous tunneling experiments with microwaves were carried out. The results agreed with quantum mechanical calculations. Electron tunneling time is hard to measure being extremely short and parasitic effects due to the electric charge of electrons may be dominant. However, quite recently the atomic ionization tunneling time has been measured. Experimental data of photonic, phononic, and electronic tunneling time is available now and will be presented. It appears that the tunneling time is a universal property independent of the field in question.
Yet another time about time - Part I
Plamen L. Simeonov
2015-08-29T23:59:59.000Z
This paper presents yet another personal reflection on one the most important concepts in both science and the humanities: time. This elusive notion has been not only bothering philosophers since Plato and Aristotle. It goes throughout human history embracing all analytical and creative (anthropocentric) disciplines. Time has been a central theme in physical and life sciences, philosophy, psychology, music, art and many more. This theme is known with a vast body of knowledge across different theories and categories. What has been explored concerns its nature (rational, irrational, arational), appearances/qualia, degrees, dimensions and scales of conceptualization (internal, external, fractal, discrete, continuous, mechanical, quantum, local, global, etc.). Of particular interest have been parameters of time such as duration ranges, resolutions, modes (present, now, past, future), varieties of tenses (e.g. present perfect, present progressive, etc.) and some intuitive, but also fancy phenomenological characteristics such as arrow, stream, texture, width, depth, density, even scent. Perhaps the most distinct characteristic of this fundamental concept is the absolute time constituting the flow of consciousness according to Husserl, the reflection of pure (human) nature without having the distinction between exo and endo. This essay is a personal reflection upon the meaning of time in modern physics and phenomenological philosophy.
Lightweight Time Modeling in Timed Creol
Bjrk, Joakim; Owe, Olaf; Schlatte, Rudolf; 10.4204/EPTCS.36.4
2010-01-01T23:59:59.000Z
Creol is an object-oriented modeling language in which inherently concurrent objects exchange asynchronous method calls. The operational semantics of Creol is written in an actor-based style, formulated in rewriting logic. The operational semantics yields a language interpreter in the Maude system, which can be used to analyze models. Recently, Creol has been applied to the modeling of systems with radio communication, such as sensor systems. With radio communication, messages expire and, if sent simultaneously, they may collide in the air. In order to capture these and other properties of distributed systems, we extended Creol's operational semantics with a notion of time. We exploit the framework of a language interpreter to use a lightweight notion of time, in contrast to that needed for a general purpose specification language. This paper presents a timed extension of Creol, including the semantics and the implementation strategy, and discusses its properties using an extended example. The approach can be...
Time Asymmetric Quantum Physics
A. Bohm
1999-02-26T23:59:59.000Z
Mathematical and phenomenological arguments in favor of asymmetric time evolution of micro-physical states are presented.
De-Xing Kong; Kefeng Liu; Ming Shen
2008-08-30T23:59:59.000Z
In this letter we construct a new time-periodic solution of the vacuum Einstein's field equations whose Riemann curvature norm takes the infinity at some points. We show that this solution is intrinsically time-periodic and describes a time-periodic universe with the "black hole". New physical phenomena are investigated and new singularities are analyzed for this universal model.
T. Matolcsi; P. Van
2006-10-23T23:59:59.000Z
A four dimensional treatment of nonrelativistic space-time gives a natural frame to deal with objective time derivatives. In this framework some well known objective time derivatives of continuum mechanics appear as Lie-derivatives. Their coordinatized forms depends on the tensorial properties of the relevant physical quantities. We calculate the particular forms of objective time derivatives for scalars, vectors, covectors and different second order tensors from the point of view of a rotating observer. The relation of substantial, material and objective time derivatives is treated.
S. Pireaux
2007-03-23T23:59:59.000Z
The LISA mission is a space interferometer aiming at the detection of gravitational waves in the [$10^{-4}$,$10^{-1}$] Hz frequency band. In order to reach the gravitational wave detection level, a Time Delay Interferometry (TDI) method must be applied to get rid of (most of) the laser frequency noise and optical bench noise. This TDI analysis is carried out in terms of the coordinate time corresponding to the Barycentric Coordinate Reference System (BCRS), TCB, whereas the data at each of the three LISA stations is recorded in terms of each station proper time. We provide here the required proper time versus BCRS time transformation. We show that the difference in rate of station proper time versus TCB is of the order of $5 10^{-8}$. The difference between station proper times and TCB exhibits an oscillatory trend with a maximum amplitude of about $10^{-3}$ s.
High resolution time interval meter
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.
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.
Intrinsic Time Quantum Geometrodynamics
Ita, Eyo Eyo; Yu, Hoi-Lai
2015-01-01T23:59:59.000Z
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.
White, Lynn
2000-06-27T23:59:59.000Z
, you expect unused time to come around again, so that when the same opportunities appear you will be wiser about how to use it. Consider how your cultural background af_fects the w ay you plan and manage time. W *Both cited in Bauer, J. It?s Time.... Effective time management means decid- ing which activity should be done from all the possibilities available, and then doing it. It is a matter of setting priorities. Deciding which jobs are most important and working on those may be better than doing less...
Intrinsic Time Quantum Geometrodynamics
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.
Developing Improved Travel Time Reliability Measures For Real-time
Bertini, Robert L.
reliability Use for prioritizing improvements Outline #12; 95th Percentile Travel Time Travel Time Index: mean travel time divided by free flow travel time Buffer Index: difference between 95th percentile travel time and mean travel time, divided by mean travel time Planning Time Index: 95th percentile
A. Boyarsky; P Gora
2007-05-07T23:59:59.000Z
We present a definition of time measurement based on high energy photons and the fundamental length scale, and show that, for macroscopic time, it is in accord with the Lorentz transformation of special relativity. To do this we define observer in a different way than in special relativity.
M. Heller; W. Sasin
1997-11-17T23:59:59.000Z
In the groupoid approach to noncommutative quantization of gravity, gravitational field is quantized in terms of a C*-algebra A of complex valued funcions on a groupoid G (with convolution as multiplication). In the noncommutative quantum gravitational regime the concepts of space and time are meaningless. We study the "emergence of time" in the transition process from the noncommutative regime to the standard space-time geometry. Precise conditions are specified under which modular groups of the von Neumann algebra generated by A can be defined. These groups are interpreted as a state depending time flow. If the above conditions are further refined one obtains a state independent time flow. We show that quantum gravitational dynamics can be expressed in terms of modular groups.
Martin, A.D.
1986-05-09T23:59:59.000Z
Method and apparatus are provided for generating an output pulse following a trigger pulse at a time delay interval preset with a resolution which is high relative to a low resolution available from supplied clock pulses. A first lumped constant delay provides a first output signal at predetermined interpolation intervals corresponding to the desired high resolution time interval. Latching circuits latch the high resolution data to form a first synchronizing data set. A selected time interval has been preset to internal counters and corrected for circuit propagation delay times having the same order of magnitude as the desired high resolution. Internal system clock pulses count down the counters to generate an internal pulse delayed by an internal which is functionally related to the preset time interval. A second LCD corrects the internal signal with the high resolution time delay. A second internal pulse is then applied to a third LCD to generate a second set of synchronizing data which is complementary with the first set of synchronizing data for presentation to logic circuits. The logic circuits further delay the internal output signal with the internal pulses. The final delayed output signal thereafter enables the output pulse generator to produce the desired output pulse at the preset time delay interval following input of the trigger pulse.
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
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.
Rubinfeld, Ronitt
Sublinear time algorithms represent a new paradigm in computing, where an algorithm must give some sort of an answer after inspecting only a very small portion of the input. We discuss the types of answers that one can ...
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 ...
Chapin, Kimberly R.
1997-01-01T23:59:59.000Z
TIME IN QUANTUM MECHANICS A Thesis by KIMBERLY R. CHAPIN Submitted to Texas A8M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style and content by: Marian O. Scully (Chair... of Committee) Edward S. Fry (Member) aan Laane (Member) Thomas W. Adair, III (Head of Department) August 1997 Major Subject: Physics TIME IN QIJANTUM MECHANICS A Thesis by KIMBERLY R. CHAPIN Submitted to the Oflice of Graduate Studies of Texas A...
Timed Alternating-Time Temporal Logic Thomas A. Henzinger1
Henzinger, Thomas A.
equally powerful options for updating the state of the game, advancing time, or blocking time. Second, we in order to specify real-time objectives for games played on timed structures. We define the semantics Timed games are a formal model for the synthesis of real-time systems [22, 20]. While much research
Burg, Theresa
Time Activity Time Activity Time Activity Tuesday CLOSED CONFERENCE CLOSED CONFERENCE CLOSED CONFERENCE 2-Jun-15 Wednesday CLOSED CONFERENCE CLOSED CONFERENCE CLOSED CONFERENCE 3-Jun-15 Thursday CLOSED
R. Brout; R. Parentani
1999-02-05T23:59:59.000Z
The notion of time in cosmology is revealed through an examination of transition matrix elements of radiative processes occurring in the cosmos. To begin with, the very concept of time is delineated in classical physics in terms of correlations between the succession of configurations which describe a process and a standard trajectory called the clock. The total is an isolated system of fixed energy. This is relevant for cosmology in that the universe is an isolated system which we take to be homogeneous and isotropic. Furthermore, in virtue of the constraint which arises from reparametrization invariance of time, it has total energy zero. Therefore the momentum of the scale factor is determined from the energy of matter. In the quantum theory this is exploited through use of the WKB approximation for the wave function of the scale factor, justified for a large universe. The formalism then gives rise to matrix elements describing matter processes. These are shown to take on the form of usual time dependent quantum amplitudes wherein the temporal dependence is given by a background which is once more fixed by the total energy of matter.
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.
Collar, Juan I.
://cfcpwork.uchicago.edu/mailman/listinfo/cafe! A Reality Check on Alternative Energy! #12;A Reality Check on Alternative Energy! Presenter: Liz Moyer! Time, factories in Europe were shutting down for lack of wood. Will it be possible in the future to support a bigger, richer population without fossil fuels (which will definitely run out someday)? Energy is a hot
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.
Bootstrapping Time Dilation Decoherence
Cisco Gooding; William G. Unruh
2015-03-18T23:59:59.000Z
We present a general relativistic model of a spherical shell of matter with a perfect fluid on its surface coupled to an internal oscillator, which generalizes a model recently introduced by the authors to construct a self-gravitating interferometer [1]. The internal oscillator evolution is defined with respect to the local proper time of the shell, allowing the oscillator to serve as a local clock that ticks differently depending on the shell's position and momentum. A Hamiltonian reduction is performed on the system, and an approximate quantum description is given to the reduced phase space. If we focus only on the external dynamics, we must trace out the clock degree of freedom, and this results in a form of intrinsic decoherence that shares some features with a proposed "universal" decoherence mechanism attributed to gravitational time dilation [2]. We show that the proposed decoherence remains present in the (gravity-free) limit of flat spacetime, indicating that the effect can be attributed entirely to proper time differences, and thus is not necessarily related to gravity. Finally, we point out a way to bootstrap the gravitational contribution to the time dilation decoherence by including self-interaction, and comment on how this can be considered a fundamentally gravitational intrinsic decoherence effect.
Time reversal communication system
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.
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.
Quinn, H; /SLAC
2009-01-27T23:59:59.000Z
This talk briefly reviews three types of time-asymmetry in physics, which I classify as universal, macroscopic and microscopic. Most of the talk is focused on the latter, namely the violation of T-reversal invariance in particle physics theories. In sum tests of microscopic T-invariance, or observations of its violation, are limited by the fact that, while we can measure many processes, only in very few cases can we construct a matched pair of process and inverse process and observe it with sufficient sensitivity to make a test. In both the cases discussed here we can achieve an observable T violation making use of flavor tagging, and in the second case also using the quantum properties of an antisymmetric coherent state of two B mesons to construct a CP-tag. Both these tagging properties depend only on very general properties of the flavor and/or CP quantum numbers and so provide model independent tests for T-invariance violations. The microscopic laws of physics are very close to T-symmetric. There are small effects that give CP- and T-violating processes in three-generation-probing weak decays. Where a T-violating observable can be constructed we see the relationships between T-violation and CP-violation expected in a CPT conserving theory. These microscopic effects are unrelated to the 'arrow of time' that is defined by increasing entropy, or in the time direction defined by the expansion of our Universe.
Date of Injury Date Time In Time Out
Date of Injury Date Time In Time Out Total time worked medical appt no work within restrictions: 9704914804; phone: 9704916745 # of hours worked TOTAL HOURS *Time off work MUST be documented by a medical note in order to be paid through injury leave *Attach lost time documentation to the report and turn
Real-Time Control with Parametric Timed Reachability Games
Boyer, Edmond
for the controller for the system, modeled as a timed automaton. Such a controller says when and which of someReal-Time Control with Parametric Timed Reachability Games A. Jovanovi S. Faucou D. Lime O. H control problems on real-time systems. A timed reachability game consists in finding a strategy
Daiqin Su; T. C. Ralph
2015-07-02T23:59:59.000Z
We show that the particle number distribution of diamond modes, modes that are localised in a finite space-time region, are thermal for the Minkowski vacuum state of a massless scalar field, an analogue to the Unruh effect. The temperature of the diamond is inversely proportional to its size. An inertial observer can detect this thermal radiation by coupling to the diamond modes using an appropriate energy scaled detector. We further investigate the correlations between various diamonds and find that entanglement between adjacent diamonds dominates.
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), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirtA Journey InsideMicroBooNE LArTPC Sarah Lockwitz, FNAL 2013 DPFTheses 2014No.7 D I STime Off Time Offof
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), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirtA Journey InsideMicroBooNE LArTPC Sarah Lockwitz, FNAL 2013 DPFTheses 2014No.7 D I STime Off Time
Bootstrapping Time Dilation Decoherence
Gooding, Cisco
2015-01-01T23:59:59.000Z
We present a general relativistic model of a spherical shell of matter with a perfect fluid on its surface coupled to an internal oscillator, which generalizes a model recently introduced by the authors to construct a self-gravitating interferometer [1]. The internal oscillator evolution is defined with respect to the local proper time of the shell, allowing the oscillator to serve as a local clock that ticks differently depending on the shell's position and momentum. A Hamiltonian reduction is performed on the system, and an approximate quantum description is given to the reduced phase space. If we focus only on the external dynamics, we must trace out the clock degree of freedom, and this results in a form of intrinsic decoherence that shares some features with a proposed "universal" decoherence mechanism attributed to gravitational time dilation [2]. We show that the proposed decoherence remains present in the (gravity-free) limit of flat spacetime, indicating that the effect can be attributed entirely to ...
Final Exam Location and Time. Math 162 Fall 2001. Date: Wednesday December 12, 2001. Time: 7:00 pm -9:00 pm. Location: Lambert Fieldhouse...
Final Exam Location and Time. Math 161 Fall 2001. Date: Friday December 14, 2001. Time: 8:00 am -10:00 am. Location: Lambert Fieldhouse...
Advertising Emergency Department Wait Times
Weiner, Scott G
2013-01-01T23:59:59.000Z
studies evaluating the advertising of ED wait times. Only 1potentially used for advertising may be inaccurate. AccessedE ditorial Advertising Emergency Department Wait Times Scott
Denoising Deterministic Time Series
Steven P. Lalley; Andrew B. Nobel
2006-04-21T23:59:59.000Z
This paper is concerned with the problem of recovering a finite, deterministic time series from observations that are corrupted by additive, independent noise. A distinctive feature of this problem is that the available data exhibit long-range dependence and, as a consequence, existing statistical theory and methods are not readily applicable. This paper gives an analysis of the denoising problem that extends recent work of Lalley, but begins from first principles. Both positive and negative results are established. The positive results show that denoising is possible under somewhat restrictive conditions on the additive noise. The negative results show that, under more general conditions on the noise, no procedure can recover the underlying deterministic series.
Real time automated inspection
Fant, Karl M. (Minneapolis, MN); Fundakowski, Richard A. (Saint Paul, MN); Levitt, Tod S. (Minneapolis, MN); Overland, John E. (Plymouth, MN); Suresh, Bindinganavle R. (New Brighton, MN); Ulrich, Franz W. (Minneapolis, MN)
1985-01-01T23:59:59.000Z
A method and apparatus 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 are segmented out 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.
Time encoded radiation imaging
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.
Real time automated inspection
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.
Time's Ontic Voltage Craig Callender
Callender, Craig
Time's Ontic Voltage Craig Callender Philosophy of time, as practiced throughout the last hundred venue for attacking questions about the nature of time--in sharp contrast to the primary venue slowly in philosophy of time.1 Since twentieth-century analytic philosophy as a whole often drew
Untameable Timed Automata! (Extended Abstract)
Doyen, Laurent
are a widely studied model for realtime systems. Since 8 years, several tools implement this modellife systems. 1 Introduction RealTime Systems Since their introduction by Alur and Dill in [AD94], timed au tomata are one of the most studied models for realtime systems. Numerous works have been devoted
Untameable Timed Automata! (Extended Abstract)
Doyen, Laurent
model for real-time systems. Since 8 years, several tools implement this model and are successfully used for a restricted class of timed automata, which has been sufficient for modeling numerous real-life systems. 1 Introduction Real-Time Systems - Since their introduction by Alur and Dill in [AD94], timed au- tomata are one
Noncommutative Time in Quantum Field Theory
Tapio Salminen; Anca Tureanu
2011-07-19T23:59:59.000Z
We analyze, starting from first principles, the quantization of field theories, in order to find out to which problems a noncommutative time would possibly lead. We examine the problem in the interaction picture (Tomonaga-Schwinger equation), the Heisenberg picture (Yang-Feldman-K\\"all\\'{e}n equation) and the path integral approach. They all indicate inconsistency when time is taken as a noncommutative coordinate. The causality issue appears as the key aspect, while the unitarity problem is subsidiary. These results are consistent with string theory, which does not admit a time-space noncommutative quantum field theory as its low-energy limit, with the exception of light-like noncommutativity.
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.
Enderlein, Jrg
Dead-time optimized time-correlated photon counting instrument with synchronized, independent timing channels Michael Wahla and Hans-Jrgen Rahn PicoQuant GmbH, Rudower Chaussee 29, D-12489 Berlin December 2006; accepted 19 February 2007; published online 23 March 2007 Time-correlated single photon
Efficient Real-Time Time-Dependent Density Functional Theory...
Office of Scientific and Technical Information (OSTI)
Efficient Real-Time Time-Dependent Density Functional Theory Method and its Application to a Collision of an Ion with a 2D Material This content will become publicly available on...
Time Dependence of ACIS Contamination
Grant, Catherine E.
Time Dependence of ACIS Contamination Chandra Calibration Workshop 27 October 2003 Catherine Grant Source Measuring the decay Monitoring contamination with the ECS Models of ECS time dependence Monitoring contamination with the LETG Agreement between models #12;ACIS External Calibration Source
Time Dependence of ACIS Contamination
Grant, Catherine E.
Time Dependence of ACIS Contamination Chandra Calibration Workshop 27 October 2003 Catherine Grant Source . Measuring the decay . Monitoring contamination with the ECS . Models of ECS time dependence . Monitoring contamination with the LETG . Agreement between models #12; ACIS External Calibration Source
Time machines and quantum theory
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.
Time translation of quantum properties
L. Vanni; R. Laura
2008-12-03T23:59:59.000Z
Based on the notion of time translation, we develop a formalism to deal with the logic of quantum properties at different times. In our formalism it is possible to enlarge the usual notion of context to include composed properties involving properties at different times. We compare our results with the theory of consistent histories.
Developmental time windows for axon growth influence neuronal network topology
Lim, Sol
2015-01-01T23:59:59.000Z
Early brain connectivity development consists of multiple stages: birth of neurons, their migration and the subsequent growth of axons and dendrites. Each stage occurs within a certain period of time depending on types of neurons and cortical layers. Forming synapses between neurons either by growing axons starting at similar times for all neurons (much-overlapped time windows) or at different time points (less-overlapped) may affect the topological and spatial properties of neuronal networks. Here, we explore the extreme cases of axon formation especially concerning short-distance connectivity during early development, either starting at the same time for all neurons (parallel, i.e. maximally-overlapped time windows) or occurring for each neuron separately one neuron after another (serial, i.e. no overlaps in time windows). For both cases, the number of potential and established synapses remained comparable. Topological and spatial properties, however, differed: neurons that started axon growth early on in s...
Dusatko, John; Allison, S.; Browne, M.; Krejcik, P.; /SLAC
2012-07-23T23:59:59.000Z
The Linac Coherent Light Source requires precision timing trigger signals for various accelerator diagnostics and controls at SLAC-NAL. A new timing system has been developed that meets these requirements. This system is based on COTS hardware with a mixture of custom-designed units. An added challenge has been the requirement that the LCLS Timing System must co-exist and 'know' about the existing SLC Timing System. This paper describes the architecture, construction and performance of the LCLS timing event system.
Gasoline Compression Ignition - Start of Injection Timing Sweep (VERIFI) |
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), 2002; Level:5 TablesExports(Journal Article)41clothThe Bonneville Power AdministrationHawaiiEnergyFlorida Julyanalysis, Software &GasArgonne National Laboratory
Local-time effect on small space-time scale
V. A. Panchelyuga; V. A. Kolombet; M. S. Panchelyuga; S. E. Shnoll
2006-10-18T23:59:59.000Z
The paper presents an investigation of local-time effect - one of the manifestations of macroscopic fluctuations phenomena. Was shown the existence of the named effect for longitudinal distance between locations of measurements up to 500 meters. Also a structure of intervals distribution in neighborhood of local-time peak was studied and splitting of the peak was found out. Obtained results lead to conclusion about sharp anisotropy of space-time.
Timing Calibration in PET Using a Time Alignment Probe
Moses, William W.; Thompson, Christopher J.
2006-01-01T23:59:59.000Z
when the two sets of calibration factors are loaded into theare equivalent. Inde, .er/#calibration, positron emissionB. Conventional Time-Delay Calibration Method 4> >,? '- -'#$
George F R Ellis
2008-12-01T23:59:59.000Z
Current theoretical physics suggests the flow of time is an illusion: the entire universe just is, with no special meaning attached to the present time. This paper points out that this view, in essence represented by usual space-time diagrams, is based on time-reversible microphysical laws, which fail to capture essential features of the time-irreversible nature of decoherence and the quantum measurement process, as well as macro-physical behaviour and the development of emergent complex systems, including life, which exist in the real universe. When these are taken into account, the unchanging block universe view of spacetime is best replaced by an evolving block universe which extends as time evolves, with the potential of the future continually becoming the certainty of the past; spacetime itself evolves, as do the entities within it. However this time evolution is not related to any preferred surfaces in spacetime; rather it is associated with the evolution of proper time along families of world lines. The default state of fundamental physics should not be taken to be a time irreversible evolution of physical states: it is an ongoing irreversible development of time itself.
Olaf Dreyer
2009-04-22T23:59:59.000Z
Attempts to quantize general relativity encounter an odd problem. The Hamiltonian that normally generates time evolution vanishes in the case of general relativity as a result of diffeomorphism invariance. The theory seems to be saying that time does not exist. The most obvious feature of our world, namely that time seems to progress and that the world changes accordingly becomes a problem in this presumably fundamental theory. This is called the problem of time. In this essay we argue that this problem is the result of an unphysical idealization. We are caught in this "problem of time" trap because we took a wrong turn in the early days of relativity by permanently including a split of geometry and matter into our physical theories. We show that another possibility exists that circumvents the problem of time and also sheds new light on other problems like the cosmological constant problem and the horizon problem in early universe cosmology.
Reactor control rod timing system
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.
Time and maps Menno-Jan Kraak Time and maps ! · Why interested in time? · What is time and · How is time perceived? · How is time represented? Why interested in time? GIScience perspective) - analysis of changes over time - analysis of patterns of change over time ! · Development of methods
Seismic velocity estimation from time migration
Cameron, Maria Kourkina
2007-01-01T23:59:59.000Z
v List of Tables Comparison of time migration and depthof seismic imaging: time migration and depth migration. TimeComparison of time migration and depth migration Adequate
Commencement Ceremony Department Time Location Department and Major Time Location
Kaji, Hajime
Engineering 15:30 Bldg. 63 Classroom 01 (2nd Fl.) Industrial and Management Systems Engineering 15:30 Bldg. 63 and Management 15:30 Bldg. 63 Classroom 01 (2nd Fl.) Department Time Location Department and Major Time Location:30 Bldg. 57 202 Modern Mechanical Engineering 10:30 Bldg. 57 202 Industrial and Management Systems
ExperTime: Tracking Expertise over Time Norwegian University of
Nrvg, Kjetil
ExperTime: Tracking Expertise over Time Jan Rybak Norwegian University of Science and Technology Norwegian University of Science and Technology kjetil.norvag@idi.ntnu.no ABSTRACT This paper presents Exper 611, 2014, Gold Coast, Queensland, Australia. ACM 978-1-4503-2257-7/14/07. http://dx.doi.org/10
Time Structure of Muonic Showers
L. Cazon; R. A. Vazquez; A. A. Watson; E. Zas
2003-11-10T23:59:59.000Z
An analytical description of the time structure of the pulses induced by muons in air showers at ground level is deduced assuming the production distance distribution for the muons can be obtained elsewhere. The results of this description are compared against those obtained from simulated showers using AIRES. Major contributions to muon time delays are identified and a relation between the time structure and the depth distribution is unveiled.
Subsystem real-time Time Dependent Density Functional Theory
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.
Quantum gravity, the origin of time and time's arrow
Moffat, J.W. (Univ. of Toronto, Ontario (Canada))
1993-03-01T23:59:59.000Z
The local Lorentz and diffeomorphism symmetries of Einstein's gravitational theory are spontaneously broken by a Higgs mechanism by invoking a phase transition in the early universe, at a critical temperature [Tc] below which the symmetry is restored. The spontaneous breakdown of the vacuum state generates an external time, and the wave function of the universe satisfies a time-dependent Schroedinger equation, which reduces to the Wheeler-deWitt equation in the classical regime for T<[Tc], allowing a semiclassical WKB approximation to the wave function. The conservation of energy is spontaneously violated for T>[Tc], and matter is created fractions of seconds after the big bang, generating the matter in the Universe. The time direction of the vacuum expectation value of the scalar Higgs field generates a time asymmetry, which defines the cosmological arrow of time and the direction of increasing entropy as the Lorentz symmetry is restored at low temperatures. 52 refs.
Quantum Gravity, the Origin of Time and Time's Arrow
J. W. Moffat
1992-09-02T23:59:59.000Z
The local Lorentz and diffeomorphism symmetries of Einstein's gravitational theory are spontaneously broken by a Higgs mechanism by invoking a phase transition in the early Universe, at a critical temperature $T_c$ below which the symmetry is restored. The spontaneous breakdown of the vacuum state generates an external time and the wave function of the Universe satisfies a time dependent Schrodinger equation, which reduces to the Wheeler-deWitt equation in the classical regime for $T T_c$ and matter is created fractions of seconds after the big bang, generating the matter in the Universe. The time direction of the vacuum expectation value of the scalar Higgs field generates a time asymmetry, which defines the cosmological arrow of time and the direction of increasing entropy as the Lorentz symmetry is restored at low temperatures.
Electric Time in Quantum Cosmology
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.
Mellor, David Hugh
2001-01-01T23:59:59.000Z
The article shows how McTaggarts distinction between A- and B-series ways of locating events in time prompted and enabled the twentieth centurys most important advances in the philosophy of time. It argues that, even if the B-series represents...
Piercing 'The Illusion of Time'
Broader source: Energy.gov [DOE]
Take an hour tonight to tune into PBS Nova's "The Fabric of the Cosmos" series tonight's episode offers a whole new perspective on time as we know it. It suggests that time itself or at least what our perceptions and experiences tell us it is could be an illusion.? Host Brian Greene is joined by a theoretical physicist from Fermilab.
STARBASE: MANAGING CONTENTION AND TIMING
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
Time Management Top 50 Strategies
, weekly and term goals in order of priority and work on top priorities. 2. Prioritize each task based-schedule yourself. 14. Get sleep, exercise and relaxation to keep your energy up. 15. Figure out your peak times of day for energy and do difficult tasks (e.g., studying) during that time. 16. Do the most difficult
The Parkes Pulsar Timing Array
R N Manchester
2006-04-13T23:59:59.000Z
Given sufficient sensitivity, pulsar timing observations can make a direct detection of gravitational waves passing over the Earth. Pulsar timing is most sensitive to gravitational waves with frequencies in the nanoHertz region, with the most likely astronomical sources being binary super-massive black holes in galaxy cores. The Parkes Pulsar Timing Array project uses the Parkes 64-m radio telescope to make precision timing observations of a sample of about 20 millisecond pulsars with a principal goal of making a direct detection of gravitational waves. Observations commenced about one year ago and so far sub-microsecond timing residuals have been achieved for more than half of these pulsars. New receiver and software systems are being developed with the aim of reducing these residuals to the level believed necessary for a positive detection of gravitational waves.
Time parallel gravitational collapse simulation
Kreienbuehl, Andreas; Ruprecht, Daniel; Krause, Rolf
2015-01-01T23:59:59.000Z
This article demonstrates the applicability of the parallel-in-time method Parareal to the numerical solution of the Einstein gravity equations for the spherical collapse of a massless scalar field. To account for the shrinking of the spatial domain in time, a tailored load balancing scheme is proposed and compared to load balancing based on number of time steps alone. The performance of Parareal is studied for both the sub-critical and black hole case; our experiments show that Parareal generates substantial speedup and, in the super-critical regime, can also reproduce the black hole mass scaling law.
Jarvis, Jenna N
2013-05-01T23:59:59.000Z
respond to continuous noise by increasing their call rate, and that the switch between the responses to intermittent noise and continuous noise occurs at a duty cycle of 50% or higher. Overall, this dissertation establishes that bats alter the timing...
TIME SCHEDULE WINTER QUARTER 1970
Kaminsky, Werner
MASTER CON TIME SCHEDULE WINTER QUARTER 1970 ADVANCE REGISTRATION NOVEMBER 3-21 IN, please leave it or pass it along so that other students may use it. #12;Winter Quarter 1970. Examination
Time Gravity and Quantum Mechanics
W. G. Unruh
1993-12-17T23:59:59.000Z
Time plays different roles in quantum mechanics and gravity. These roles are examined and the problems that the conflict in the roles presents for quantum gravity are briefly summarised.
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
User Experiment Time-Line Event Target Call for proposal 2 months before proposals are due PAC Proposals Due 7 weeks before PAC meeting TAC Report for PAC Proposals (includes...
Radovan, Mario
2015-01-01T23:59:59.000Z
The paper puts forward a conceptual framework in which the phenomenon of time can be presented and discussed in a proper way. We argue that change is ontologically and epistemologically a more basic phenomenon than time. Time is an abstract entity created by the human mind on the basis of the experience of change. Physical reality is a process of ceaseless becoming and vanishing; time is not a part of that process. Time is the abstract bank in relation to which we measure the intensity and amount of the flow (change) of physical reality. We must differentiate physical reality from abstract entities (language) by means of which we speak about this reality. It is necessary to differentiate a formal description (formulas) from its interpretation: a correct formal description can be interpreted in a logically inconsistent and factually wrong way. We argue that the discourse about the relativity of time joins (mixes) physical reality and language, and gives an inconsistent interpretation of correct formulas. Regar...
Geothermal Exploration Cost and Time
Jenne, Scott
2013-02-13T23:59:59.000Z
The Department of Energys Geothermal Technology Office (GTO) provides RD&D funding for geothermal exploration technologies with the goal of lowering the risks and costs of geothermal development and exploration. The National Renewable Energy Laboratory (NREL) was tasked with developing a metric in 2012 to measure the impacts of this RD&D funding on the cost and time required for exploration activities. The development of this cost and time metric included collecting cost and time data for exploration techniques, creating a baseline suite of exploration techniques to which future exploration cost and time improvements can be compared, and developing an online tool for graphically showing potential project impacts (all available at http://en.openei.org/wiki/Gateway: Geothermal). This paper describes the methodology used to define the baseline exploration suite of techniques (baseline), as well as the approach that was used to create the cost and time data set that populates the baseline. The resulting product, an online tool for measuring impact, and the aggregated cost and time data are available on the Open Energy Information website (OpenEI, http://en.openei.org) for public access. - Published 01/01/2013 by US National Renewable Energy Laboratory NREL.
Reduction in maximum time uncertainty of paired time signals
Theodosiou, George E. (West Chicago, IL); Dawson, John W. (Clarendon Hills, IL)
1983-01-01T23:59:59.000Z
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 .ltoreq.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 20-800.
Reduction in maximum time uncertainty of paired time signals
Theodosiou, G.E.; Dawson, J.W.
1983-10-04T23:59:59.000Z
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][<=]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--800. 6 figs.
Reduction in maximum time uncertainty of paired time signals
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.
Finite time analysis of an endoreversible fuel cell A. Vaudrey
Paris-Sud XI, Universit de
Finite time analysis of an endoreversible fuel cell A. Vaudrey , P. Baucour, F. Lanzetta, R of this paper consists in a detailed thermodynamical description of a fuel cell, using finite time thermodynamics (FTT). Starting from the comparison beetween a reversible fuel cell and a Carnot heat engine
Time evolution of cascade decay
Daniel Boyanovsky; Louis Lello
2014-06-25T23:59:59.000Z
We study non-perturbatively the time evolution of cascade decay for generic fields $\\pi \\rightarrow \\phi_1\\phi_2\\rightarrow \\phi_2\\chi_1\\chi_2$ and obtain the time dependence of amplitudes and populations for the resonant and final states. We analyze in detail the different time scales and the manifestation of unitary time evolution in the dynamics of production and decay of resonant intermediate and final states. The probability of occupation (population) "flows" as a function of time from the initial to the final states. When the decay width of the parent particle $\\Gamma_\\pi$ is much larger than that of the intermediate resonant state $\\Gamma_{\\phi_1}$ there is a "bottleneck" in the flow, the population of resonant states builds up to a maximum at $t^* = \\ln[\\Gamma_\\pi/\\Gamma_{\\phi_1}]/(\\Gamma_\\pi-\\Gamma_{\\phi_1})$ nearly saturating unitarity and decays to the final state on the longer time scale $1/\\Gamma_{\\phi_1}$. As a consequence of the wide separation of time scales in this case the cascade decay can be interpreted as evolving sequentially $\\pi \\rightarrow \\phi_1\\phi_2; ~ \\phi_1\\phi_2\\rightarrow \\phi_2\\chi_1\\chi_2$. In the opposite limit the population of resonances ($\\phi_1$) does not build up substantially and the cascade decay proceeds almost directly from the initial parent to the final state without resulting in a large amplitude of the resonant state. An alternative but equivalent non-perturbative method useful in cosmology is presented. Possible phenomenological implications for heavy sterile neutrinos as resonant states and consequences of quantum entanglement and correlations in the final state are discussed.
Static timing analysis in VLSI design
Zhou, Shuo
2006-01-01T23:59:59.000Z
II.B Static Timing AnalysisStatic Timing Analysis in the Design Flow FalseChip Analysis . . . . . . . . . . . . . . I.C Static Timing
Snyder noncommutative space-time from two-time physics
Romero, Juan M.; Zamora, Adolfo [Instituto de Ciencias Nucleares, UNAM, Apartado Postal 70-543, Mexico DF (Mexico)
2004-11-15T23:59:59.000Z
We show that the two-time physics model leads to a mechanical system with Dirac brackets consistent with the Snyder noncommutative space. A Euclidean version of this space is also obtained and it is shown that both spaces have a dual system describing a particle in a curved space.
Time Series Analysis 1 Time series in astronomy
Babu, G. Jogesh
(supernovae, gamma-ray bursts) Difficulties in astronomical time series Gapped data streams: Diurnal & monthly phenomena: thermonuclear (novae, X-ray bursts), magnetic reconnection (solar/stellar flares), star death); pulsation (helioseismology, Cepheids) Stochastic phenomena: accretion (CVs, X-ray binaries, Seyfert gals
Time Consistent Risk Measure Under Stopping Time Framework ...
2015-02-13T23:59:59.000Z
or down-side risk measures have been proposed, from the Roy's safety-first criterion .... the probability P(xt ? Ct) to be no less than ? at time t, i.e.,. P(xt ? Ct) ...... 1, into the objective function E[xt], we have. E[xt] = t?1. ? k=0 ekx0 + t?1. ? s
Method and apparatus for measuring response time
Johanson, Edward W. (New Lenox, IL); August, Charles (Darien, IL)
1985-01-01T23:59:59.000Z
A method of measuring the response time of an electrical instrument which generates an output signal in response to the application of a specified input, wherein the output signal varies as a function of time and when subjected to a step input approaches a steady-state value, comprises the steps of: (a) applying a step input of predetermined value to the electrical instrument to generate an output signal; (b) simultaneously starting a timer; (c) comparing the output signal to a reference signal to generate a stop signal when the output signal is substantially equal to the reference signal, the reference signal being a specified percentage of the steady-state value of the output signal corresponding to the predetermined value of the step input; and (d) applying the stop signal when generated to stop the timer.
Method and apparatus for measuring response time
Johanson, E.W.; August, C.
1983-08-11T23:59:59.000Z
A method of measuring the response time of an electrical instrument which generates an output signal in response to the application of a specified input, wherein the output signal varies as a function of time and when subjected to a step input approaches a steady-state value, comprises the steps of: (a) applying a step input of predetermined value to the electrical instrument to generate an output signal; (b) simultaneously starting a timer; (c) comparing the output signal to a reference signal to generate a stop signal when the output signal is substantially equal to the reference signal, the reference signal being a specified percentage of the steady-state value of the output signal corresponding to the predetermined value of the step input; and (d) applying the stop signal when generated to stop the timer.
Wednesday Aug 10 2005 . All times are London time. Sign up Userna Passw International Economy / G8 of Poverty, which is part of an FT reader offer to coincide with the G8 summit. Sachs starts his blog, signifying little." Join in the discussion and poll on the G8 agenda, and on Sachs' blog. Friday July 8, 2005
Day 1 (all times in Eastern Time Zone) Start End Activity POC
Mike Veenstra 10:30 11:00 Break 11:00 11:30 Codes and standards requirements CSA HGV 4, ASME X and B31:00 10:30 Codes and standards requirements SAE J2579, SAE J2601: knowledge gaps, R&D data/testing needs
Haesen, S; Haesen, Stefan; Verstraelen, Leopold
2004-01-01T23:59:59.000Z
Due to the growing interest in embeddings of space-time in higher-dimensional spaces we consider a specific type of embedding. After proving an inequality between intrinsically defined curvature invariants and the squared mean curvature, we extend the notion of ideal embeddings from Riemannian geometry to the indefinite case. Ideal embeddings are such that the embedded manifold receives the least amount of tension from the surrounding space. Then it is shown that the de Sitter spaces, a Robertson-Walker space-time and some anisotropic perfect fluid metrics can be ideally embedded in a five-dimensional pseudo-Euclidean space.
Stefan Haesen; Leopold Verstraelen
2004-04-01T23:59:59.000Z
Due to the growing interest in embeddings of space-time in higher-dimensional spaces we consider a specific type of embedding. After proving an inequality between intrinsically defined curvature invariants and the squared mean curvature, we extend the notion of ideal embeddings from Riemannian geometry to the indefinite case. Ideal embeddings are such that the embedded manifold receives the least amount of tension from the surrounding space. Then it is shown that the de Sitter spaces, a Robertson-Walker space-time and some anisotropic perfect fluid metrics can be ideally embedded in a five-dimensional pseudo-Euclidean space.
John Max Wilson; Keith Andrew
2012-07-27T23:59:59.000Z
We investigate the relative time scales associated with finite future cosmological singularities, especially those classified as Big Rip cosmologies, and the maximum predictability time of a coupled FRW-KG scalar cosmology with chaotic regimes. Our approach is to show that by starting with a FRW-KG scalar cosmology with a potential that admits an analytical solution resulting in a finite time future singularity there exists a Lyapunov time scale that is earlier than the formation of the singularity. For this singularity both the cosmological scale parameter a(t) and the Hubble parameter H(t) become infinite at a finite future time, the Big Rip time. We compare this time scale to the predictability time scale for a chaotic FRW-KG scalar cosmology. We find that there are cases where the chaotic time scale is earlier than the Big Rip singularity calling for special care in interpreting and predicting the formation of the future cosmological singularity.
On hitting times and fastest strong stationary times for skip-free chains
Fill, James Allen
2007-01-01T23:59:59.000Z
An (upward) skip-free Markov chain with the set of nonnegative integers as state space is a chain for which upward jumps may be only of unit size; there is no restriction on downward jumps. In a 1987 paper, Brown and Shao determined, for an irreducible continuous-time skip-free chain and any d, the passage time distribution from state 0 to state d. When the nonzero eigenvalues nu_j of the generator are all real, their result states that the passage time is distributed as the sum of d independent exponential random variables with rates nu_j. We give another proof of their theorem. In the case of birth-and-death chains, our proof leads to an explicit representation of the passage time as a sum of independent exponential random variables. Diaconis and Miclo recently obtained the first such representation, but our construction is much simpler. We obtain similar (and new) results for a fastest strong stationary time T of an ergodic continuous-time skip-free chain with stochastically monotone time-reversal started ...
Waste to Energy Time Activities
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
Curricular internship Timing and Duration
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
The TESLA Time Projection Chamber
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.
Time of flight mass spectrometer
Ulbricht, Jr., William H. (Arvada, CO)
1984-01-01T23:59:59.000Z
A time-of-flight mass spectrometer is described in which ions are desorbed from a sample by nuclear fission fragments, such that desorption occurs at the surface of the sample impinged upon by the fission fragments. This configuration allows for the sample to be of any thickness, and eliminates the need for complicated sample preparation.
Time Management Top 50 Strategies
daily, weekly and term goals in order of priority and work on top priorities. 2. Prioritize each task limitations and do not overschedule yourself. 14. Get sleep, exercise and relaxation to keep your energy up. 15. Figure out your peak times of day for energy and do difficult tasks (e.g.: studying) during
TIME-RESOLVED VIBRATIONAL SPECTROSCOPY
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 DOEâ??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 DOEâ??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.
Time dependence of Hawking radiation entropy
Page, Don N., E-mail: profdonpage@gmail.com [Department of Physics, 4-181 CCIS, University of Alberta, Edmonton, Alberta T6G 2E1 (Canada)
2013-09-01T23:59:59.000Z
If a black hole starts in a pure quantum state and evaporates completely by a unitary process, the von Neumann entropy of the Hawking radiation initially increases and then decreases back to zero when the black hole has disappeared. Here numerical results are given for an approximation to the time dependence of the radiation entropy under an assumption of fast scrambling, for large nonrotating black holes that emit essentially only photons and gravitons. The maximum of the von Neumann entropy then occurs after about 53.81% of the evaporation time, when the black hole has lost about 40.25% of its original Bekenstein-Hawking (BH) entropy (an upper bound for its von Neumann entropy) and then has a BH entropy that equals the entropy in the radiation, which is about 59.75% of the original BH entropy 4?M{sub 0}{sup 2}, or about 7.509M{sub 0}{sup 2} ? 6.268 10{sup 76}(M{sub 0}/M{sub s}un){sup 2}, using my 1976 calculations that the photon and graviton emission process into empty space gives about 1.4847 times the BH entropy loss of the black hole. Results are also given for black holes in initially impure states. If the black hole starts in a maximally mixed state, the von Neumann entropy of the Hawking radiation increases from zero up to a maximum of about 119.51% of the original BH entropy, or about 15.018M{sub 0}{sup 2} ? 1.254 10{sup 77}(M{sub 0}/M{sub s}un){sup 2}, and then decreases back down to 4?M{sub 0}{sup 2} = 1.049 10{sup 77}(M{sub 0}/M{sub s}un){sup 2}.
Treating Time Travel Quantum Mechanically
John-Mark A. Allen
2014-10-10T23:59:59.000Z
The fact that closed timelike curves (CTCs) are permitted by general relativity raises the question as to how quantum systems behave when time travel to the past occurs. Research into answering this question by utilising the quantum circuit formalism has given rise to two theories: Deutschian-CTCs (D-CTCs) and "postselected" CTCs (P-CTCs). In this paper the quantum circuit approach is thoroughly reviewed, and the strengths and shortcomings of D-CTCs and P-CTCs are presented in view of their non-linearity and time travel paradoxes. In particular, the "equivalent circuit model"---which aims to make equivalent predictions to D-CTCs, while avoiding some of the difficulties of the original theory---is shown to contain errors. The discussion of D-CTCs and P-CTCs is used to motivate an analysis of the features one might require of a theory of quantum time travel, following which two overlapping classes of new theories are identified. One such theory, the theory of "transition probability" CTCs (T-CTCs), is fully developed. The theory of T-CTCs is shown not to have certain undesirable features---such as time travel paradoxes, the ability to distinguish non-orthogonal states with certainty, and the ability to clone or delete arbitrary pure states---that are present with D-CTCs and P-CTCs. The problems with non-linear extensions to quantum mechanics are discussed in relation to the interpretation of these theories, and the physical motivations of all three theories are discussed and compared.
The Parkes Pulsar Timing Array
R. N. Manchester
2007-11-12T23:59:59.000Z
Detection and study of gravitational waves from astrophysical sources is a major goal of current astrophysics. Ground-based laser-interferometer systems such as LIGO and VIRGO are sensitive to gravitational waves with frequencies of order 100 Hz, whereas space-based systems such as LISA are sensitive in the millihertz regime. Precise timing observations of a sample of millisecond pulsars widely distributed on the sky have the potential to detect gravitational waves at nanohertz frequencies. Potential sources of such waves include binary super-massive black holes in the cores of galaxies, relic radiation from the inflationary era and oscillations of cosmic strings. The Parkes Pulsar Timing Array (PPTA) is an implementation of such a system in which 20 millisecond pulsars have been observed using the Parkes radio telescope at three frequencies at intervals of two -- three weeks for more than two years. Analysis of these data has been used to limit the gravitational wave background in our Galaxy and to constrain some models for its generation. The data have also been used to investigate fluctuations in the interstellar and Solar-wind electron density and have the potential to investigate the stability of terrestrial time standards and the accuracy of solar-system ephemerides.
DEVELOPING IMPROVED TRAVEL TIME RELIABILITY MEASURES FOR REAL-TIME AND ARCHIVED ITS DATA
Bertini, Robert L.
including travel time, 95th percentile travel time, travel time index, buffer index planning time index-based detector data, collected in periodic special studies, or estimated using simulation [1,3]: 95th Percentile between 95th percentile travel time and mean travel time, divided by mean travel time. Planning Time Index
to employ regiments of astronomers: gamma-ray bursts, pulsars, X-ray emitting binary stars, Dipeshis visible on the face of a Williams cathode-ray memory tube. Starting in late 1945, John von Neumann
Time-Bounded Verification Joel Ouaknine1
Worrell, James
Time-Bounded Verification Jo¨el Ouaknine1 , Alexander Rabinovich2 , and James Worrell1 1 Oxford prob- lems for timed automata over time intervals of fixed, bounded length. One of our main results is that time-bounded language inclusion for timed automata is 2EXPSPACE-complete. We also investigate the satis
Shapiro, Benjamin
, select Quit to exit. Completing Your Timesheet 1. From the Time Entry page, select the appropriate pay - Menu screen, select Quit to exit. Completing Your Timesheet 1. From the Time Entry page, selectPayroll & Human Resources (PHR) System Time Entry Tip Sheet PHR EXEMPT TIME ENTRY PHR EXEMPT TIME
Timing the Parkes Multibeam Pulsars
R. N. Manchester; A. G. Lyne; F. Camilo; V. M. Kaspi; I. H. Stairs; F. Crawford; D. J. Morris; J. F. Bell; N. D'Amico
1999-11-17T23:59:59.000Z
Measurement of accurate positions, pulse periods and period derivatives is an essential follow-up to any pulsar survey. The procedures being used to obtain timing parameters for the pulsars discovered in the Parkes multibeam pulsar survey are described. Completed solutions have been obtained so far for about 80 pulsars. They show that the survey is preferentially finding pulsars with higher than average surface dipole magnetic fields. Eight pulsars have been shown to be members of binary systems and some of the more interesting results relating to these are presented.
Regression quantiles for time series
Cai, Zongwu
2002-02-01T23:59:59.000Z
~see, e+g+, Ibragimov and Linnik, 1971, p+ 316!+ Namely, partition REGRESSION QUANTILES FOR TIME SERIES 187 $1, + + + , n% into 2qn 1 1 subsets with large block of size r 5 rn and small block of size s 5 sn+ Set q 5 qn 5 ? n rn 1 sn? , (A.7) where {x...! are the standard LindebergFeller conditions for asymptotic normality of Qn,1 for the independent setup+ Let us first establish ~A+8!+ To this effect, we define the large-block size rn by rn 5 {~nhn!102} and the small-block size sn 5 {~nhn!1020log n}+ Then, as n r...
Time Scales in Spectator Fragmentation
C. Schwarz; for the ALADIN collaboration
2000-09-07T23:59:59.000Z
Proton-proton correlations and correlations of p-alpha, d-alpha, and t-alpha from spectator decays following Au + Au collisions at 1000 AMeV have been measured with an highly efficient detector hodoscope. The constructed correlation functions indicate a moderate expansion and low breakup densities similar to assumptions made in statistical multifragmentation models. In agreement with a volume breakup rather short time scales were deduced employing directional cuts in proton-proton correlations. PACS numbers: 25.70.Pq, 21.65.+f, 25.70.Mn
Busetti, Fabio; Harvey, Andrew C
as an alternative - or complement - to quan- tiles; see, for example, Newey and Powell (1987), Efron (1991) and, in a time series context, De Rossi and Harvey (2006b). We then de?ne residuals based on expectiles and show that they can be used to construct... based on absolute values, (5), are very close to those of the #17;#28; (DQ) tests in (3). The earlier theoretical analysis indicated that the statistics are identical for known quan- tiles and it appears that enforcing the symmetry restriction when...
Real time infrared aerosol analyzer
Johnson, Stanley A. (Countryside, IL); Reedy, Gerald T. (Bourbonnais, IL); Kumar, Romesh (Naperville, IL)
1990-01-01T23:59:59.000Z
Apparatus for analyzing aerosols in essentially real time includes a virtual impactor which separates coarse particles from fine and ultrafine particles in an aerosol sample. The coarse and ultrafine particles are captured in PTFE filters, and the fine particles impact onto an internal light reflection element. The composition and quantity of the particles on the PTFE filter and on the internal reflection element are measured by alternately passing infrared light through the filter and the internal light reflection element, and analyzing the light through infrared spectrophotometry to identify the particles in the sample.
Time Contortions in Modern Physics
A. F. Kracklauer
2002-06-24T23:59:59.000Z
As a basis for epistemological study of ``time,'' we analyze three suspect phenomena introduced by modern physics: non-locality, asymmetric aging and advanced interaction. It is shown that all three arise in connection with what has to be taken as arbitrary ideosyncrasies in formulation. It is shown that minor changes result in internally consistent variations of both Quantum Mechanics and Special Relativity devoid of these phenomena. The reinterpretation of some experiments though to confirm the existence of non-locality and asymmetric aging is briefly considered and a possible test is proposed.
Global Warming in Geologic Time
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.
AUTOMATIC PROGRAM TIMING PROFILES WITH FTN4
Friedman, Richard.
2010-01-01T23:59:59.000Z
September 22-25, 1980 AUTOMATIC PROGRAM TIMING PROFILES WITHW-7405-ENG-48 LBL-1l290 Automatic Program Timing ProfilesW-1405-ENG-48 LBL-11290 Automatic Program Timing Profiles
Time Dependent Density Functional Theory An introduction
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
Tips: Time-Based Electricity Rates
Broader source: Energy.gov [DOE]
Time-based electricity programs encourage you to use energy when the demand is low by giving you a lower price for electricity during those times.
Time Travel and the Reality of Spontaneity
C. K. Raju
2008-04-05T23:59:59.000Z
Contrary to the informed consensus, time travel implies spontaneity (as distinct from chance) so that time travel can only be of the second kind.
Variable residence time vortex combustor
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.
NONLINEAR MULTIVARIATE AND TIME SERIES ANALYSIS BY NEURAL NETWORK METHODS
Hsieh, William
NONLINEAR MULTIVARIATE AND TIME SERIES ANALYSIS BY NEURAL NETWORK METHODS William W. Hsieh] Methods in multivariate statistical analysis are essential for working with large amounts of geophysical multivariate statistical analysis, there is a hierarchy of methods, starting with linear regression at the base
Time Zone Information Compiled by John Case
Case, John
Deviations From Standard Time 1 The U.S. is on daylight saving time from the first Sunday in April @ 2am til the last Sunday in October @ 2am. Western Europe is on daylight saving time generally from the last Sunday designation. Additionally, it proclaims daylight saving time as does Europe. India's standard is at +05
Time change Almut E. D. Veraart
Time change Almut E. D. Veraart CREATES University of Aarhus Aarhus Denmark +45 8942 2142 averaart 272595 winkel@stats.ox.ac.uk TimeChange8.tex LaTeX2e Abstract The mathematical concept of timechanging continuoustime stochastic pro- cesses can be regarded as one of the standard tools for building financial
Timed CSP: A Retrospective Joel Ouaknine 1
Ouaknine, Joël
APC 2005 Timed CSP: A Retrospective Jo¨el Ouaknine 1 Oxford University Computing Laboratory, UK Timed CSP, from its inception nearly twenty years ago to very recent semantical and algorithmic developments. Key words: Process algebra, Timed CSP. Timed CSP was first proposed in 1986 by Reed and Roscoe
Shapiro, Benjamin
, select Quit to exit. Completing Your Timesheet 1. From the Time Entry page, select the appropriate pay the Time Entry - Menu screen, select Quit to exit. Completing Your Timesheet 1. From the Time Entry page. 5. From the Time Entry - Menu screen, select Quit to exit. HELP/SUPPORT HELP/SUPPORT HELP
Updatable Timed Automata Patricia Bouyer1
Doyen, Laurent
decidable and undecidable classes of updatable timed automata. We also study the expressive power classes of timed systems. 1 Introduction Since their introduction by Alur and Dill [AD90,AD94], timed automata are one of the most-studied and most-established models for real-time systems. Numerous works have
Concurrency Theory Lecture 22: Timed Modelling & Conclusions
Ábrahám, 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
Solar Real-Time Pricing: Is Real-Time Electricity Pricing Beneficial...
Information Resources Solar Real-Time Pricing: Is Real-Time Electricity Pricing Beneficial to Solar PV in New York City? Solar Real-Time Pricing: Is Real-Time Electricity...
Time and Causation 1 Walter J Freeman Perception of time and causation through the
Freeman, Walter J.
Time and Causation 1 Walter J Freeman Perception of time and causation through the kinesthesia, kinesthesia, perception, time Abstract Perception is an intentional action through space in time by which. Perceived time differs from world time in ways that are determined by the neural mechanisms
Time and Causation 1 Walter J Freeman Perception of time and causation through the
Freeman, Walter J.
Time and Causation 1 Walter J Freeman Perception of time and causation through the kinesthesia, perception, time Abstract Perception is an intentional action through space in time by which the finite brain. Perceived time differs from world time in ways that are determined by the neural mechanisms
Time and Matter An International Colloquium on the Science of Time
Time and Matter An International Colloquium on the Science of Time August 11 - 17, 2002 at Venice International University, Italy Topics: Precise measurements of time Arrow of time in classical and quantum physics Tunneling time and various paradoxa in quantum physics Matter, antimatter and microscopic time
Timed AlternatingTime Temporal Logic # Thomas A. Henzinger 1 and Vinayak S. Prabhu 2
Henzinger, Thomas A.
powerful options for updating the state of the game, advancing time, or blocking time. Second, we wish in order to specify realtime objectives for games played on timed structures. We define the semantics Timed games are a formal model for the synthesis of realtime systems [22, 20]. While much research e
Multiple output timing and trigger generator
Wheat, Robert M. [Los Alamos National Laboratory; Dale, Gregory E [Los Alamos National Laboratory
2009-01-01T23:59:59.000Z
In support of the development of a multiple stage pulse modulator at the Los Alamos National Laboratory, we have developed a first generation, multiple output timing and trigger generator. Exploiting Commercial Off The Shelf (COTS) Micro Controller Units (MCU's), the timing and trigger generator provides 32 independent outputs with a timing resolution of about 500 ns. The timing and trigger generator system is comprised of two MCU boards and a single PC. One of the MCU boards performs the functions of the timing and signal generation (the timing controller) while the second MCU board accepts commands from the PC and provides the timing instructions to the timing controller. The PC provides the user interface for adjusting the on and off timing for each of the output signals. This system provides 32 output or timing signals which can be pre-programmed to be in an on or off state for each of 64 time steps. The width or duration of each of the 64 time steps is programmable from 2 {micro}s to 2.5 ms with a minimum time resolution of 500 ns. The repetition rate of the programmed pulse train is only limited by the time duration of the programmed event. This paper describes the design and function of the timing and trigger generator system and software including test results and measurements.
Time-of-flight radio location system
McEwan, T.E.
1996-04-23T23:59:59.000Z
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. 7 figs.
Time-of-flight radio location system
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.
[PROCESSING WEB TIME ENTRY FOR EMPLOYEES
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
Undergraduate Program Time Limits and Work Schedules
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Time Limits and Work Schedules Undergraduate Program Time Limits and Work Schedules Point your career towards Los Alamos Lab: work with the best minds on the planet in an inclusive...
Robert Heinecken's TV/Time Environment
Pfahler, Zachary Austin
2012-01-01T23:59:59.000Z
Environment, for example, exploits the televisual medium inMedium is the Message: The Aesthetics of TV/Time Environmentwith TV/Time Environment. 11 The Medium is the Message:
Parental Time, Behaviors and Childhood Obesity
Kuteesa, Annette
2012-02-14T23:59:59.000Z
is to test and correct for the problem of endogeneity stemming from unobserved health factors that can distort any meaningful causal impact of maternal time on child weight status. Using the household production theory, parental time allocation decisions...
Each instant of time a new Universe
Yakir Aharonov; Sandu Popescu; Jeff Tollaksen
2013-05-07T23:59:59.000Z
We present an alternative view of quantum evolution in which each moment of time is viewed as a new "universe" and time evolution is given by correlations between them.
Timing Verification of Adaptive Integrated Circuits
Kumar, Rohit
2014-08-01T23:59:59.000Z
An adaptive circuit can perform built-in self-detection of timing variations and accordingly adjust itself to avoid timing violations. Compared with conventional over-design approach, adaptive circuit design is conceptually advantageous in terms...
Timing Verification of Adaptive Integrated Circuits
Kumar, Rohit
2014-08-01T23:59:59.000Z
An adaptive circuit can perform built-in self-detection of timing variations and accordingly adjust itself to avoid timing violations. Compared with conventional over-design approach, adaptive circuit design is conceptually advantageous in terms...
Can hedge funds time market liquidity?
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 ...
Detection Methods for Astronomical Time Series
Coehlo, Nathan Kirk
2010-01-01T23:59:59.000Z
Time Series by Nathan Kirk Coehlo A dissertation submittedCopyright 2010 by Nathan Kirk Coehlo Abstract DetectionTime Series by Nathan Kirk Coehlo Doctor of Philosophy in
Constant time algorithms in sparse graph model
Nguyen, Huy Ngoc, Ph. D. Massachusetts Institute of Technology
2010-01-01T23:59:59.000Z
We focus on constant-time algorithms for graph problems in bounded degree model. We introduce several techniques to design constant-time approximation algorithms for problems such as Vertex Cover, Maximum Matching, Maximum ...
Modeling Timed Concurrent Systems using Generalized Ultrametrics
Modeling Timed Concurrent Systems using Generalized Ultrametrics Xiaojun Liu Eleftherios Matsikoudis Edward A. Lee Electrical Engineering and Computer Sciences University of California at Berkeley to lists, requires prior specific permission. #12;Modeling Timed Concurrent Systems using Generalized
Arnold Schwarzenegger REAL-TIME GRID RELIABILITY
Energy Research (PIER) California Energy Commission Beth Chambers Contract Manager Jamie Patterson (VSA) prototype to monitor system voltage conditions and provide real time dispatchers with reliabilityArnold Schwarzenegger Governor REAL-TIME GRID RELIABILITY MANAGEMENT California ISO Real
Time symmetry in wave function collapse models
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.
Real-time network simulation support for
Liu, Xiaowen "Jason"
Real-time network simulation support for scalable routing experiments Yue Li*, Jason Liu, and Raju-time network simulation with the realism of open- source routing protocol implementations. The infrastructure experiments on light-weight virtual machines. Keywords: network simulation; real-time simulation; network
Time Dependent Density Functional Theory An Introduction
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 Linear Response Formalism 3 TDDFT in practice: The ALDA: Achievements and Shortcomings 4 Resources Time
Symbolic Verification of Timed Asynchronous Hardware Protocols
Stevens, Ken
of system level verification by applying symbolic model checking techniques to help mitigate the state constraints into verification models to prove timed behavioral correctness of systems employing timed protocol to model timing in asynchronous hardware protocols a novel mapping of tim- ing into the verification flow
Business Time in the Foreign Exchange Markets
Edinburgh, University of
Business Time in the Foreign Exchange Markets Mark J L Orr Centre for Cognitive Science Edinburgh University June 1997 #12; Business Time in the Foreign Exchange Markets Mark J L Orr y Centre for Cognitive; Contents 1 Introduction 4 2 The Price Change Scaling Law 5 3 Business Time 7 4 The BZW Data 11 5 Volatility
A Linear-Time Approach for Static Timing Analysis Covering All Process Corners
Najm, Farid N.
A Linear-Time Approach for Static Timing Analysis Covering All Process Corners Sari Onaissi into the timing analysis of a circuit. With the increase in the number of interesting process vari- ables process variations lead to circuit timing variability and a corresponding timing yield loss. Traditional
Finite-Time Stability of Discrete-Time Nonlinear Systems: Analysis and Design
Finite-Time Stability of Discrete-Time Nonlinear Systems: Analysis and Design S. Mastellone, P. Dorato, C. T. Abdallah Abstract-- Finite-time stability of nonlinear discrete-time systems is studied we propose a new analysis result for fi- nite time stability of deterministic and stochastic discrete
Time_Limit_Extension_Form.docx | Revised: 10/13/2014 Time Limit Extension Request Form
Meyers, Steven D.
Time_Limit_Extension_Form.docx | Revised: 10/13/2014 Time Limit Extension Request Form OFFICE on your request. PURPOSE The Time Limit Extension may be filed when a student nears the end of the time limitation for completion of the requirements for their degree but needs more time to complete the degree
Time-of-flight radio location system
McEwan, T.E.
1997-08-26T23:59:59.000Z
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. 8 figs.
Time-of-flight radio location system
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.
Relativity theory in time-space
kos G. Horvth
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.
Multi-time wave functions for quantum field theory
Petrat, Sren, E-mail: petrat@math.lmu.de [Mathematisches Institut, Ludwig-Maximilians-Universitt, Theresienstr. 39, 80333 Mnchen (Germany); Tumulka, Roderich, E-mail: tumulka@math.rutgers.edu [Department of Mathematics, Rutgers University, 110 Frelinghuysen Road, Piscataway, NJ 08854-8019 (United States)
2014-06-15T23:59:59.000Z
Multi-time wave functions such as ?(t{sub 1},x{sub 1},,t{sub N},x{sub N}) have one time variable t{sub j} for each particle. This type of wave function arises as a relativistic generalization of the wave function ?(t,x{sub 1},,x{sub N}) of non-relativistic quantum mechanics. We show here how a quantum field theory can be formulated in terms of multi-time wave functions. We mainly consider a particular quantum field theory that features particle creation and annihilation. Starting from the particleposition representation of state vectors in Fock space, we introduce multi-time wave functions with a variable number of time variables, set up multi-time evolution equations, and show that they are consistent. Moreover, we discuss the relation of the multi-time wave function to two other representations, the TomonagaSchwinger representation and the Heisenberg picture in terms of operator-valued fields on spacetime. In a certain sense and under natural assumptions, we find that all three representations are equivalent; yet, we point out that the multi-time formulation has several technical and conceptual advantages. -- Highlights: Multi-time wave functions are manifestly Lorentz-covariant objects. We develop consistent multi-time equations with interaction for quantum field theory. We discuss in detail a particular model with particle creation and annihilation. We show how multi-time wave functions are related to the TomonagaSchwinger approach. We show that they have a simple representation in terms of operator valued fields.
Electromagnetic Field Quantization in Time-Dependent Dielectric Media
Xiao-Min Bei; Zhong-Zhu Liu
2011-04-18T23:59:59.000Z
We present a Gupta-Bleuler quantization scheme for the electromagnetic field in time-dependent dielectric media. Starting from the Maxwell equations, a generalization of the Lorentz gauge condition adapted to time varying dielectrics is derived. Using this gauge, a Gupta-Bleuler approach to quantize all polarizations of the radiation field and the corresponding constraint condition are introduced. This new approach is different from the quantized electromagnetic field in vacuum in the sense that here the contributions of unphysical photons cannot be thoroughly eliminated, which further lead to a surface charge density. Finally, a discussion of potential experimental tests and possible implication is also made.
Nyberg, Linda M.
2008-01-01T23:59:59.000Z
and Theory 19.2 (1980); David Carr, Place and Time: On the19.2 (2005): 260-290. Carr, David. Place and Time: On the
Pesce, J.J.; Niemiec, J.M.; Chiang, M.Y. [National Institute of Standards and Technology, Gaithersburg, MD (United States)] [and others
1995-12-31T23:59:59.000Z
Here we present time-temperature and time-aging time superposition data for a commercial grade polycarbonate. The data reduction is performed for dynamic-mechanical data obtained in torsion over a range of temperatures from 103.6 to 144.5{degrees}C and aging times to 16 h. For time-temperature superposition the results show the deviation of the sub-T{sub g} response from the WTF equation. Two response regimes are observed: at temperatures far below T{sub g} the log(a{sub T}) is linear in T, followed by a transition towards the WLF behavior as T{sub g} is approached. The temperature at which the behavior changes from a linear dependence of log(aT) on T to the transition-type behavior is found to depend on the aging time. This temperature decreases as aging time increases. The time-aging time response is found to behave in a normal way. At temperatures far below T{sub g} the log(a{sub te}) vs log(t{sub e}) is constant and has a slope somewhat less than unity. However, nearer to T{sub g} the slope decreases and there is a second regime in which the aging virtually ceases. In this polycarbonate, above 136.9{degrees}C, no aging is observed.
Real-time method and apparatus for measuring the decay-time constant of a fluorescing phosphor
Britton, Jr., Charles L. (Alcoa, TN); Beshears, David L. (Knoxville, TN); Simpson, Marc L. (Knoxville, TN); Cates, Michael R. (Oak Ridge, TN); Allison, Steve W. (Knoxville, TN)
1999-01-01T23:59:59.000Z
A method for determining the decay-time constant of a fluorescing phosphor is provided, together with an apparatus for performing the method. The apparatus includes a photodetector for detecting light emitted by a phosphor irradiated with an excitation pulse and for converting the detected light into an electrical signal. The apparatus further includes a differentiator for differentiating the electrical signal and a zero-crossing discrimination circuit that outputs a pulse signal having a pulse width corresponding to the time period between the start of the excitation pulse and the time when the differentiated electrical signal reaches zero. The width of the output pulse signal is proportional to the decay-time constant of the phosphor.
Statistical criteria for characterizing irradiance time series.
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.
Time-Energy Costs of Quantum Measurements
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.
Reactor control rod timing system. [LMFBR
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.
Note: Neutron bang time diagnostic system on Shenguang-III prototype
Tang, Qi; Chen, Jiabin; Liu, Zhongjie; Zhan, Xiayu; Song, Zifeng, E-mail: mphyszf@qq.com [Research Center of Laser Fusion, China Academy of Engineering Physics, P. O. Box 919-986, Mianyang, Sichuan 621900 (China)] [Research Center of Laser Fusion, China Academy of Engineering Physics, P. O. Box 919-986, Mianyang, Sichuan 621900 (China)
2014-04-15T23:59:59.000Z
A neutron bang time (NBT) diagnostic system has been implemented on Shenguang-III prototype. The bang time diagnostic system is based on a sensitive fusion neutron detector, which consists of a plastic scintillator and a micro-channel plate photomultiplier tube (PMT). An optical fiber bundle is used to couple the scintillator and the PMT. The bang time system is able to measure bang time above a neutron yield of 10{sup 7}. Bang times and start time of laser were related by probing x-ray pulses produced by 200 ps laser irradiating golden targets. Timing accuracy of the NBT is better than 60 ps.
Time Reversal of Bose-Einstein Condensates
Martin, J.; Georgeot, B.; Shepelyansky, D. L. [Laboratoire de Physique Theorique, Universite de Toulouse III, CNRS, 31062 Toulouse (France)
2008-08-15T23:59:59.000Z
Using Gross-Pitaevskii equation, we study the time reversibility of Bose-Einstein condensates (BEC) in kicked optical lattices, showing that in the regime of quantum chaos, the dynamics can be inverted from explosion to collapse. The accuracy of time reversal decreases with the increase of atom interactions in BEC, until it is completely lost. Surprisingly, quantum chaos helps to restore time reversibility. These predictions can be tested with existing experimental setups.
Halanay type inequalities on time scales
Ad\\ivar, Murat
2011-01-01T23:59:59.000Z
This paper aims to introduce Halanay type inequalities on time scales. By means of these inequalities we derive new global stability conditions for nonlinear dynamic equations on time scales. Giving several examples we show that beside generalization and extension to q-difference case, our results also provide improvements for the existing theory regarding differential and difference inequalites, which are the most important particular cases of dynamic inequalities on time scales.
DNA Bubble Life Time in Denaturation
Zh. S. Gevorkian; Chin-Kun Hu
2010-10-11T23:59:59.000Z
We have investigated the denaturation bubble life time for a homogeneous as well as for a heterogeneous DNA within a Poland-Scheraga model. It is shown that at criticality the bubble life time for a homogeneous DNA is finite provided that the loop entropic exponent c>2 and has a scaling dependence on DNA length for c<2. Heterogeneity in the thermodynamical limit makes the bubble life time infinite for any entropic exponent.
Optimal timing problems in environmental economics
Pindyck, Robert S.
2001-01-01T23:59:59.000Z
Because of the uncertainties and irreversibilities that are often inherent in environmental degradation, its prevention, and its economic consequences, environmental policy design can involve important problems of timing. ...
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.
Hyperbolic statics in space-time
Dmitry Pavlov; Sergey Kokarev
2014-12-11T23:59:59.000Z
Based on the concept of material event as an elementary material source that is concentrated on metric sphere of zero radius --- light-cone of Minkowski space-time, we deduce the analog of Coulomb's law for hyperbolic space-time field universally acting between the events of space-time. Collective field that enables interaction of world lines of a pair of particles at rest contains a standard 3-dimensional Coulomb's part and logarithmic addendum. We've found that the Coulomb's part depends on a fine balance between causal and geometric space-time characteristics (the two regularizations concordance).
Minimum Day Time Load Calculation and Screening
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Distributed Generation Interconnection Collaborative (DGIC) "Minimum Day Time Load Calculation and Screening" Dora Nakafuji and Anthony Hong, Hawaiian Electric Co. Babak Enayati,...
Time reversal symmetry and collapse models
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.
Real Time Grid Reliability Management 2005
Eto, Joe
2008-01-01T23:59:59.000Z
Energy Management System (SCADA/EMS). In the long term, theadvanced real time control. SCADA is a category of softwareequipment and conditions. SCADA systems include hardware and
A general perspective on time observables
Bryan W. Roberts
2014-04-19T23:59:59.000Z
I propose a general geometric framework in which to discuss the existence of time observables. This frameworks allows one to describe a local sense in which time observables always exist, and a global sense in which they can sometimes exist subject to a restriction on the vector fields that they generate. Pauli's prohibition on quantum time observables is derived as a corollary to this result. I will then discuss how time observables can be regained in modest extensions of quantum theory beyond its standard formulation.
SPECTRAL APPROXIMATION OF TIME-HARMONIC MAXWELL ...
2014-10-25T23:59:59.000Z
to solve the three-dimensional time-harmonic Maxwell equations in exterior domains. We first .... Define the vector L2-space and its tangential vector space:.
Time-varying Spectral Analysis in Neurophysiological Time Series Using Hilbert
Whitcher, Brandon
ability to detect time-varying coherence and phase properties. Key words: Coherence, electromyographic
On time-reversal and space-time harmonic processes for Markovian quantum channels
Francesco Ticozzi; Michele Pavon
2009-04-29T23:59:59.000Z
The time reversal of a completely-positive, nonequilibrium discrete-time quantum Markov evolution is derived via a suitable adjointness relation. Space-time harmonic processes are introduced for the forward and reverse-time transition mechanisms, and their role for relative entropy dynamics is discussed.
A Real Time Operating System Survey What the heck is a Real Time system
Groppi, Christopher
A Real Time Operating System Survey John Ford 1 #12; What the heck is a Real Time system anyway.'' From POSIX 1003.1: ``Realtime in operating systems: the ability of the operating system to pro videTime Operating System) has to have a realtime kernel ffl Good documentation ffl Good device support ffl Good
Discrete-Time Scheduling under Real-Time Constraints Eduard Cerny
Aboulhamid, El Mostapha
into a discrete- time relative schedule. Such a schedule serves as the basis for implementing a synchronous state-machine controller. Keywords: Timing diagrams, relative scheduling, real-time constraints, synchronous state machines that is suitable for synchronous system implementations. The input specification is in the form of timing diagrams
J. H. McGuire; L. Kaplan; Kh. Kh. Shakov; A. Chalastaras; A. M. Smith; A. Godunov; H. Schmidt-Bcking; D. Uskov
2005-12-29T23:59:59.000Z
Time ordering may be defined by first defining the limit of no time ordering (NTO) in terms of a time average of an external interaction, V(t). Previously, time correlation was defined in terms of a similar limit called the independent time approximation (ITA). Experimental evidence for time correlation has not yet been distinguished from experimental evidence for time ordering.
Continuous time random walk models for fractional space-time diffusion equations
Sabir Umarov
2014-09-14T23:59:59.000Z
In this paper continuous time random walk models approximating fractional space-time diffusion processes are studied. Stochastic processes associated with the considered equations represent time-changed processes, where the time-change process is a L\\'evy's stable subordinator with the stability index $\\beta \\in (0,1).$ In the parer the convergence of constructed CTRWs to time-changed processes associated with the corresponding fractional diffusion equations are proved using a new analytic method.
Integrated method for chaotic time series analysis
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.
Light gas gun with reduced timing jitter
Laabs, Gary W. (Los Alamos, NM); Funk, David J. (Los Alamos, NM); Asay, Blaine W. (Los Alamos, NM)
1998-01-01T23:59:59.000Z
Gas gun with reduced timing jitter. 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.
Multivariate Time Series Forecasting in Incomplete Environments
Roberts, Stephen
Multivariate Time Series Forecasting in Incomplete Environments Technical Report PARG 08-03 Seung of Oxford December 2008 #12;Seung Min Lee and Stephen J. Roberts Technical Report PARG 08-03 Multivariate missing observations and forecasting future values in incomplete multivariate time series data. We study
Practical reporting times for environmental samples
Bayne, C.K.; Schmoyer, D.D.; Jenkins, R.A.
1993-02-01T23:59:59.000Z
Preanalytical holding times for environmental samples are specified because chemical and physical characteristics may change between sampling and chemical analysis. For example, the Federal Register prescribes a preanalytical holding time of 14 days for volatile organic compounds in soil stored at 4{degrees}C. The American Society for Testing Materials (ASTM) uses a more technical definition that the preanalytical holding time is the day when the analyte concentration for an environmental sample falls below the lower 99% confidence interval on the analyte concentration at day zero. This study reviews various holding time definitions and suggest a new preanalytical holding time approach using acceptable error rates for measuring an environmental analyte. This practical reporting time (PRT) approach has been applied to nineteen volatile organic compounds and four explosives in three environmental soil samples. A PRT nomograph of error rates has been developed to estimate the consequences of missing a preanalytical holding time. This nomograph can be applied to a large class of analytes with concentrations that decay linearly or exponentially with time regardless of sample matrices and storage conditions.
Time Fractional Formalism: Classical and Quantum Phenomena
Hosein Nasrolahpour
2012-03-18T23:59:59.000Z
In this review, we present some fundamental classical and quantum phenomena in view of time fractional formalism. Time fractional formalism is a very useful tool in describing systems with memory and delay. We hope that this study can provide a deeper understanding of the physical interpretations of fractional derivative.
System Identification: Time Varying and Nonlinear Methods
Majji, Manoranjan
2010-07-14T23:59:59.000Z
. In the process, we generalize the classical time invariant input output AutoRegressive model with an eXogenous input (ARX) models to the time varying case and realize an asymptotically stable observer as a byproduct of the calculations. It is further found...
Response time distributions via reversed processes
Imperial College, London
Response time distributions via reversed processes Peter G. Harrison Maria G. Vigliotti Abstract in both the forward and reversed processes. There- fore if the reversed process is known, each node-sojourn time can be taken from either process. In particular, the reversed process can be used for the first
Laser Telecommunication timeLaser beam
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
Light gas gun with reduced timing jitter
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.
On the nature of cosmological time
Magain, Pierre
2015-01-01T23:59:59.000Z
Time is a parameter playing a central role in our most fundamental modeling of natural laws. Relativity theory shows that the comparison of times measured by different clocks depends on their relative motions and on the strength of the gravitational field in which they are embedded. In standard cosmology, the time parameter is the one measured by fundamental clocks, i.e. clocks at rest with respect to the expanding space. This proper time is assumed to flow at a constant rate throughout the whole history of the Universe. We make the alternative hypothesis that the rate at which cosmological time flows depends on the dynamical state of the Universe. In thermodynamics, the arrow of time is strongly related to the second law, which states that the entropy of an isolated system will always increase with time or, at best, stay constant. Hence, we assume that time measured by fundamental clocks is proportional to the entropy of the region of the Universe that is causally connected to them. Under that simple assumpt...
Count-doubling time safety circuit
Rusch, Gordon K. (Downers Grove, IL); Keefe, Donald J. (Lemont, IL); McDowell, William P. (Downers Grove, IL)
1981-01-01T23:59:59.000Z
There is provided a nuclear reactor count-factor-increase time monitoring circuit which includes a pulse-type neutron detector, and means for counting the number of detected pulses during specific time periods. Counts are compared and the comparison is utilized to develop a reactor scram signal, if necessary.
Integrated method for chaotic time series analysis
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.
Automatic Verification of Multiqueue Discrete Timed Automata
Dang, Zhe
become a useful model to investigate the verification of real time systems and have been extensively studied. The expressive power of TA has many limitations in modeling, since many realtime systems. The MQDTA model can be used to specify and verify various systems with unbounded queues, such as a real
A Probabilistic Time Reversal Theorem Kenneth Baclawski
Baclawski, Kenneth B.
example combines observations that are exponentially distributed. One application of this technique-lives. The time of the singular event decays backwards in time with an exponential distribution. We find if observations are normally distributed, it is not optimal for all distributions. To illustrate this phenomenon
Neutrino flavor instabilities in a time-dependent supernova model
Abbar, Sajad
2015-01-01T23:59:59.000Z
A dense neutrino medium such as that inside a core-collapse supernova can experience collective flavor conversion or oscillations because of the neutral-current weak interaction among the neutrinos. This phenomenon has been studied in a restricted, stationary supernova model which possesses the (spatial) spherical symmetry about the center of the supernova and the (directional) axial symmetry around the radial direction. Recently it has been shown that these spatial and directional symmetries can be broken spontaneously by collective neutrino oscillations. In this paper we analyze the neutrino flavor instabilities in a time-dependent supernova model. Our results show that collective neutrino oscillations start at approximately the same radius in both the stationary and time-dependent supernova models unless there exist very rapid variations in local physical conditions on timescales of a few microseconds or shorter. Our results also suggest that collective neutrino oscillations can vary rapidly with time in t...
Time-dependent CET to address cavity flooding
Dion, D.R. [Pacific Gas & Electric, San Francisco, CA (United States)
1996-12-31T23:59:59.000Z
This paper addresses the issue of reactor cavity flooding as a possible part of the overall severe accident management program for a pressurized water reactor (PWR). It proposes the construction of a time-dependent containment event tree (CET) that is tailored for the issue at hand and in which the CET evolves in real time. Probabilities of containment failure are assessed at 12, 24, 36, and 48 hr after the start of an event. This is in contrast to the usual CET formulations where events are called {open_quotes}early{close_quotes} or {open_quotes}late{close_quotes} and where these adjectives are usually not precisely correlated with real time but to an event such as vessel failure. This analysis is performed for a four-loop Westinghouse reactor with a large dry containment. MAAP4 was run to support the quantification of the new CET.
Relaxation times calculated from angular deflections
E. Athanassoula; Ch. L. Vozikis; J. C. Lambert
2001-08-21T23:59:59.000Z
In this paper we measure the two-body relaxation time from the angular deflection of test particles launched in a rigid configuration of field particles. We find that centrally concentrated configurations have relaxation times that can be shorter than those of the corresponding homogeneous distributions by an order of magnitude or more. For homogeneous distributions we confirm that the relaxation time is proportional to the number of particles. On the other hand centrally concentrated configurations have a much shallower dependence, particularly for small values of the softening. The relaxation time increases with the inter-particle velocities and with softening. The latter dependence is not very strong, of the order of a factor of two when the softening is increased by an order of magnitude. Finally we show that relaxation times are the same on GRAPE-3 and GRAPE-4, dedicated computer boards with limited and high precision respectively.
Time-bin entangled photon holes
J. Liang; J. D. Franson; T. B. Pittman
2012-08-23T23:59:59.000Z
The general concept of entangled photon holes is based on a correlated absence of photon pairs in an otherwise constant optical background. Here we consider the specialized case when this background is confined to two well-defined time bins, which allows the formation of time-bin entangled photon holes. We show that when the typical coherent state background is replaced by a true single-photon (Fock state) background, the basic time-bin entangled photon-hole state becomes equivalent to one of the time-bin entangled photon-pair states. We experimentally demonstrate these ideas using a parametric down-conversion photon-pair source, linear optics, and post-selection to violate a Bell inequality with time-bin entangled photon holes.
Time delay measurement in the frequency domain
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Durbin, Stephen M.; Liu, Shih -Chieh; Dufresne, Eric M.; Li, Yuelin; Wen, Haidan
2015-08-06T23:59:59.000Z
Pumpprobe studies at synchrotrons using X-ray and laser pulses require accurate determination of the time delay between pulses. This becomes especially important when observing ultrafast responses with lifetimes approaching or even less than the X-ray pulse duration (~100 ps). The standard approach of inspecting the time response of a detector sensitive to both types of pulses can have limitations due to dissimilar pulse profiles and other experimental factors. Here, a simple alternative is presented, where the frequency response of the detector is monitored versus time delay. Measurements readily demonstrate a time resolution of ~1 ps. Improved precision is possible bymoresimply extending the data acquisition time.less
Space-time defects and teleparallelism
J. W. Maluf; A. Goya
2001-10-24T23:59:59.000Z
We consider the class of space-time defects investigated by Puntigam and Soleng. These defects describe space-time dislocations and disclinations (cosmic strings), and are in close correspondence to the actual defects that arise in crystals and metals. It is known that in such materials dislocations and disclinations require a small and large amount of energy, respectively, to be created. The present analysis is carried out in the context of the teleparallel equivalent of general relativity (TEGR). We evaluate the gravitational energy of these space-time defects in the framework of the TEGR and find that there is an analogy between defects in space-time and in continuum material systems: the total gravitational energy of space-time dislocations and disclinations (considered as idealized defects) is zero and infinit, respectively.
Tunneling time calculations for general finite wavepackets based on the presence time formalism
O. del Barco; M. Ortuo; V. Gasparian
2015-05-31T23:59:59.000Z
We analyze the tunneling time problem via the presence time formalism. With this method we reproduce previous results for very long wavepackets and we are able to calculate the tunneling time for general wavepackets of arbitrary shape and length. The tunneling time for a general wavepacket is equal to the average over the energy components of the standard phase time. With this approach we can also calculate the time uncertainty. We have checked that the results obtained with this approach agree extremely well with numerical simulations of the wavepacket evolution.
Energy-time and frequency-time uncertainty relations: exact inequalities
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.
Narayanaswamy's 1971 aging theory and material time
Jeppe C. Dyre
2015-08-23T23:59:59.000Z
The Bochkov-Kuzovlev nonlinear fluctuation-dissipation theorem is used to derive Narayanaswamy's phenomenological theory of physical aging, in which this highly nonlinear phenomenon is described by a linear material-time convolution integral. A characteristic property of the Narayanaswamy aging description is material-time translational invariance, and this is here taken as a basic assumption of the derivation. It is shown that only one possible definition of the material time obeys this invariance, namely the square of the distance travelled from a configuration of the system far back in time. The paper concludes with suggestions for computer simulations that test for consequences of material-time translational invariance. One of these is a "unique-triangles property" according to which any three points on the system's path form a triangle such that two side lengths determine the third; this is analogous to the well-known triangular relation for time-autocorrelation functions of aging spin glasses [L. F. Cugliandolo and J. Kurchan, J. Phys. A: Math. Gen. 27, 5749 (1994)]. The unique-triangles property implies a simple geometric interpretation of out-of-equilibrium time-autocorrelation functions, which extends to aging a previously proposed framework for such functions in equilibrium [J. C. Dyre, cond-mat/9712222].
Does Daylight Savings Time Affect Traffic Accidents?
Deen, Sophia 1988-
2012-04-20T23:59:59.000Z
in real time for a variety of reasons such as an unpredictably hot day or an outage at a power plant. The balancing market operates in real time to balance actual load and generation. Depending upon whether more or less power is needed than the day-ahead... map this model into a market with a day-ahead schedule followed by a balancing auction. We index the costs of generation (at time t) of the N firms in this market by {Cit (q), i = 1, . . . , N}. We take total demand ?Dt (p) = Dt (p)+ ?t to be the sum...
Real time sensor for therapeutic radiation delivery
Bliss, M.; Craig, R.A.; Reeder, P.L.
1998-01-06T23:59:59.000Z
The invention is a real time sensor for therapeutic radiation. A probe is placed in or near the patient that senses in real time the dose at the location of the probe. The strength of the dose is determined by either an insertion or an exit probe. The location is determined by a series of vertical and horizontal sensing elements that gives the operator a real time read out dose location relative to placement of the patient. The increased accuracy prevents serious tissue damage to the patient by preventing overdose or delivery of a dose to a wrong location within the body. 14 figs.
Otten, James
MOVING FORTH AND BACK IN TIME James Otten Clearly objects do move forth and back in space. Thus, for instance, Jackson walks from home to the corner drugstore and then walks back home. But do objects also move forth and back in time? And if not..., would it be logically possible for them to do so? Indeed, what would even constitute a proper description of an object's moving forth and back in time? My aim in this paper is to answer these perplexing questions.1 Richard Taylor has developed a...
Time as a parameter of statistical ensemble
Sergei Viznyuk
2011-11-26T23:59:59.000Z
The notion of time is derived as a parameter of statistical ensemble representing the underlying system. Varying population numbers of microstates in statistical ensemble result in different expectation values corresponding to different times. We show a single parameter which equates to the notion of time is logarithm of the total number of microstates in statistical ensemble. We discuss the implications of proposed model for some topics of modern physics: Poincar\\'e recurrence theorem vs. Second Law of Thermodynamics, matter vs. anti-matter asymmetry of the universe, expansion of the universe, Big Bang.
Long-time limit of correlation functions
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.
Time-dependent potential barriers and superarrivals
H. Karami; S. V. Mousavi
2014-09-09T23:59:59.000Z
Scattering of a Gaussian wavepacket from rectangular potential barriers with increasing widths or heights is studied numerically. It is seen that during a certain time interval the time-evolving transmission probability increases compared to the corresponding unperturbed cases. In the literature this effect is known as superarrival in transmission probability. We present a trajectory-based explanation for this effect by using the concept of quantum potential energy and computing a selection of Bohmian trajectories. Relevant parameters in superarrivals are determined for the case that the barrier width increases linearly during the dispersion of the wavepacket. Nonlinear in time perturbation is also considered.
Travelling times in scattering by obstacles
Lyle Noakes; Luchezar Stoyanov
2014-09-29T23:59:59.000Z
The paper deals with some problems related to recovering information about an obstacle in an Euclidean space from certain measurements of lengths of generalized geodesics in the exterior of the obstacle. The main result is that if two obstacles satisfy some generic regularity conditions and have (almost) the same traveling times, then the generalized geodesic flows in their exteriors are conjugate on the non-trapping part of their phase spaces with a time preserving conjugacy. In the case of a union of two strictly convex domains in the plane, a constructive algorithm is described to recover the obstacle from traveling times.
Relativity of Space-Time Geometry
L. V. Verozub
1996-06-14T23:59:59.000Z
We argue that space-time geometry is not absolute with respect to the frame of reference being used. The space-time metric differential form $ds$ in noninertial frames of reference (NIFR) is caused by the properties of the used frames in accordance with the Berkley - Leibnitz - Mach - Poincar\\'{e} ideas about relativity of space and time . It is shown that the Sagnac effect and the existence of inertial forces in NIFR can be considered from this point of view. An experimental test is proposed.
Real time sensor for therapeutic radiation delivery
Bliss, Mary (West Richland, WA); Craig, Richard A. (West Richland, WA); Reeder, Paul L. (Richland, WA)
1998-01-01T23:59:59.000Z
The invention is a real time sensor for therapeutic radiation. A probe is placed in or near the patient that senses in real time the dose at the location of the probe. The strength of the dose is determined by either an insertion or an exit probe. The location is determined by a series of vertical and horizontal sensing elements that gives the operator a real time read out dose location relative to placement of the patient. The increased accuracy prevents serious tissue damage to the patient by preventing overdose or delivery of a dose to a wrong location within the body.
Wapstra, Erik
MAKING THE TIME TO FIND THE TIME Many students struggle to find a way to organise their time around all the things they have to do and all the things they want to do ... and to use the time into your approach to study. Where does your time go?? It is very difficult to make a time management plan
Reliable Downlink Scheduling for Wireless Networks with Real-Time and Non-Real Time Clients
Jain, Abhishek
2014-08-05T23:59:59.000Z
reliability to the real time clients, while Round Robin policy provides reliability to the clients but fails to achieve high system throughput in a time-varying wireless network. Apart from these policies, there are scheduling policies which prioritize clients...
Time-aging time-stress superposition in soft glass under tensile deformation field
Asima Shaukat; Ashutosh Sharma; Yogesh M. Joshi
2010-06-10T23:59:59.000Z
We have studied the tensile deformation behaviour of thin films of aging aqueous suspension of Laponite, a model soft glassy material, when subjected to a creep flow field generated by a constant engineering normal stress. Aqueous suspension of Laponite demonstrates aging behaviour wherein it undergoes time dependent enhancement of its elastic modulus as well as its characteristic relaxation time. However, under application of the normal stress, the rate of aging decreases and in the limit of high stress, the aging stops with the suspension now undergoing a plastic deformation. Overall, it is observed that the aging that occurs over short creep times at small normal stresses is same as the aging that occurs over long creep times at large normal stresses. This observation allows us to suggest an aging time - process time - normal stress superposition principle, which can predict rheological behaviour at longer times by carrying out short time tests.
Jansen, Maarten
Contents 1. The Classical Wavelet Transform for Continuous-time and Discrete- time Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 The Continuous Wavelet Transform . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1.1 The Haar wavelet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1
Space-Time Localization using Times of Arrival Sriram Venkateswaran and Upamanyu Madhow
Madhow, Upamanyu
Space-Time Localization using Times of Arrival Sriram Venkateswaran and Upamanyu Madhow Department of Electrical and Computer Engineering University of California Santa Barbara, CA 93106, USA Email: {sriram
Automatic tuning of continuous-time filters
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...
Scheduling Kalman filters in continuous time
Ny, Jerome Le
A set of N independent Gaussian linear time invariant systems is observed by M sensors whose task is to provide the best possible steady-state causal minimum mean square estimate of the state of the systems, in addition ...
Preventive overhaul time for power transformers
Sarmadi, M. [Pennsylvania State Univ., University Park, PA (United States). Electrical Engineering Dept.; Rouhi, J. [Univ. of Mazandaran (Iran, Islamic Republic of); Fayyaz, A. [Mazandaran Power Co. (Iran, Islamic Republic of)
1999-11-01T23:59:59.000Z
Power transformers are the major piece of equipment in high-voltage substations. A considerable number of these transformers exist in Iran`s integrated network. Due to the climate diversity and improper usage, many of these transformers age rapidly, suffer failure and are taken out of service before half their useful life. At the present time the utility companies have no specific time-frame and plan for preventive overhaul. Detection of preventive overhaul time will increase the remaining life of transformers and improve the reliability of substations. An exact check of the remaining lifetime of transformers is not yet possible by available diagnostic techniques. In this paper, the authors present a method of identifying the right time for preventive overhaul in 63 kV power transformers. This method is developed based on 25 year transformer performance records in Northern Iran (subtropical climate) and with the utilization of studies done by electrical engineering communities world-wide.
Audio classification from time-frequency texture
Slotine, Jean-Jacques E.
Time-frequency representations of audio signals often resemble texture images. This paper derives a simple audio classification algorithm based on treating sound spectrograms as texture images. The algorithm is inspired ...
Space and time from translation symmetry
Albert Schwarz
2009-05-16T23:59:59.000Z
We show that the notions of space and time in algebraic quantum field theory arise from translation symmetry if we assume asymptotic commutativity. We argue that this construction can be applied to string theory.
Myrinet Real Time Protocol with flexible routing
Kini, Savita
1998-01-01T23:59:59.000Z
Real Time communication relies on resource reservation ics. along the path of the connection for performance guarantees, typically in terms of bounded delays. A fully distributed admission control scheme for resource allocation in real...
The Time's Arrow within the Uncertainty Quantum
Zhen Wang
1998-06-22T23:59:59.000Z
A generalized framework is developed which uses a set description instead of wavefunction to emphasize the role of the observer. Such a framework is found to be very effective in the study of the measurement problem and time's arrow. Measurement in classical and quantum theory is given a unified treatment. With the introduction of the concept of uncertainty quantum which is the basic unit of measurement, we show that the time's arrow within the uncertainty quantum is just opposite to the time's arrow in the observable reality. A special constant is discussed which explains our sensation of time and provides a permanent substrate for all change. It is shown that the whole spacetime connects together in a delicate structure.
Hong, Tianzhen
2009-01-01T23:59:59.000Z
N ATIONAL L ABORATORY EnergyPlus Run Time Analysis Tianzhenl y s i s Development of EnergyPlus for Use in Title 24 andCommission Staff Use of EnergyPlus Deliverable for Task
Convex Optimization: from Real-Time Embedded
Hall, Julian
, statistics finance supply chain, revenue management, advertising control signal and image processing, . . . ) total variation reconstruction in signal processing compressed sensing Convex Optimization 11 #12Convex Optimization: from Real-Time Embedded to Large-Scale Distributed Stephen Boyd Neal Parikh
Optimization Online - Time Consistent Risk Measure Under ...
Zhiping Chen
2015-05-12T23:59:59.000Z
May 12, 2015 ... ... we introduce a new risk measure which reflects the extra time cost between ... Xi'an Jiaotong University, 710049 Xi'an, Shaanxi, P. R. China.
Fully Polynomial Time Approximation Schemes for Stochastic ...
2014-09-03T23:59:59.000Z
Jun 13, 2013 ... The Hong Kong Polytechnic University, Hong Kong, China. Research ... The value zt(It) is simply the cost of an optimal policy from time period t...
Virtual stationary timed automata for mobile networks
Nolte, Tina Ann, 1979-
2009-01-01T23:59:59.000Z
In this thesis, we formally define a programming abstraction for mobile networks called the Virtual Stationary Automata programming layer, consisting of real mobile clients, virtual timed I/O automata called virtual ...
Timing control by redundant inhibitory neuronal circuits
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.
Purves, AC
2010-01-01T23:59:59.000Z
7383. Scott, W. C. 1966. Wind Imagery in the Oresteia. 3035; West 1961: 13336. Wind and Time in Homeric Epic 56. Stern, L. 2004. Paths That Wind through the Thicket of
Real time PCR measurement by fluorescence anisotropy
Crane, Bryan Lee, 1976-
2005-01-01T23:59:59.000Z
Real-time polymerase chain reaction (PCR) is the gold-standard for quantitation in both mutation and gene expression analyses. Already this technique has found valuable clinical application in disease diagnosis and progression ...
The timely self-portrait machine
Haun, Gregory Cosmo
1992-01-01T23:59:59.000Z
This thesis explores the philosophy which underlies the Timely Self-Portrait Machine. The cultural history of the machine, the phenomenon of Television, and the personal history of this project are discussed. Technical ...
Near Real-Time Push Middleware
Mal, Siddhartha Byron
2012-01-01T23:59:59.000Z
The mean time over all tests for SQL lat/lon searches wasmilliseconds, and 264.1 for SQL geography searches (Figureplatform capability between SQL and Java, and to represent
Automatic tuning of continuous-time filters
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...
Casimir forces in the time domain: Applications
Johnson, Steven G.
Our previous article [Phys. Rev. A 80, 012115 (2009)] introduced a method to compute Casimir forces in arbitrary geometries and for arbitrary materials that was based on a finite-difference time-domain (FDTD) scheme. In ...
Diffraction in Time of Polymer Particles
A. Martn-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.
Network With Costs: Timing and Flow Decomposition
Ho, Tracey
Network With Costs: Timing and Flow Decomposition Shreeshankar Bodas, Jared Grubb, Sriram Sridharan, Tracey Ho, Sriram Vishwanath {bodas, grubb, sridhara, sriram}@ece.utexas.edu, tho@caltech.edu Abstract
Timing system control software in the SLC
Thompson, K.; Phinney, N.
1985-04-01T23:59:59.000Z
A new timing system that allows precision (approx.1 to 2 ns) control of the trigger times of klystrons, beam position monitors, and other devices on a pulse-to-pulse basis at up to 360 Hz is in operation in the first third of the SLAC linear accelerator. The control software is divided between a central host VAX and local Intel 8086-based microprocessor clusters. Facilities exist to set up and adjust the timing of devices or groups of devices independently for beam pulses having different destinations and purposes, which are run in an interlaced fashion during normal machine operation. Upgrading of the system is currently underway, using a new version of the Programmable Delay Unit CAMAC module to allow pipelining of timing information for three machine pulses. An overview of the current state of the system is presented in this paper, with an emphasis on software control.
Type Systems For Polynomial-time Computation
Hofmann, Martin
This thesis introduces and studies a typed lambda calculus with higher-order primitive recursion over inductive datatypes which has the property that all definable number-theoretic functions are polynomial time computable. ...
Electron Waiting Times in Mesoscopic Conductors
Mathias Albert; Graldine Haack; Christian Flindt; Markus Bttiker
2012-02-14T23:59:59.000Z
Electron transport in mesoscopic conductors has traditionally involved investigations of the mean current and the fluctuations of the current. A complementary view on charge transport is provided by the distribution of waiting times between charge carriers, but a proper theoretical framework for coherent electronic systems has so far been lacking. Here we develop a quantum theory of electron waiting times in mesoscopic conductors expressed by a compact determinant formula. We illustrate our methodology by calculating the waiting time distribution for a quantum point contact and find a cross-over from Wigner-Dyson statistics at full transmission to Poisson statistics close to pinch-off. Even when the low-frequency transport is noiseless, the electrons are not equally spaced in time due to their inherent wave nature. We discuss the implications for renewal theory in mesoscopic systems and point out several analogies with energy level statistics and random matrix theory.
Extending quantum control of time-independent systems to time-dependent systems
Zhen-Yu Wang; Ren-Bao Liu
2011-01-27T23:59:59.000Z
We establish that if a scheme can control a time-independent system arbitrarily coupled to a generic finite bath over a short period of time $T$ with control precision $O(T^{N+1})$, it can also realize the control with the same order of precision on smoothly time-dependent systems. This result extends the validity of various universal dynamical control schemes to arbitrary analytically time-dependent systems.
Time Domain Continuous Imaging TIME DOMAIN CONTINUOUS IMAGING doesn't sound like
Dietz, Henry G. "Hank"
the scene with skewed timing and exposure settings. Our 3D-printed array camera at SC14 coordinates four
Energy-time uncertainty principle and lower bounds on sojourn time
Joachim Asch; Olivier Bourget; Victor Cortes; Claudio Fernandez
2015-07-23T23:59:59.000Z
One manifestation of quantum resonances is a large sojourn time, or autocorrelation, of states which are initially localized. We elaborate on Lavine's time-energy uncertainty principle and give an estimate on the sojourn time. The bound involves Fermi's Golden Rule for the case of perturbed embedded eigenstates. Only very mild regularity is required. We illustrate the theory by applications to resonances for time dependent- and multistate systems .
Optimum time for artificial insemination of the bovine species at various times of the year
Broadway, John Louis
1973-01-01T23:59:59.000Z
OPTIMUM TIME FOR ARTIFICIAL INSEMINATION OF THE BOVINE SPECIES AT VARIOUS TIMES OF THE YEAR A Thesis by JOHN LOUIS BROAUNAY, III Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE December 1973 Major Subject; Physiology of Reproduction OPTIMUM TIME FOR ARTIFICIAL INSEMINATION OP THE BOVINE SPECIES AT VARIOUS TIMES OF THE YEAR A Thesis by JOHN LOUIS BROAINAY, III Approved as to style and content...
System Identification: Time Varying and Nonlinear Methods
Majji, Manoranjan
2010-07-14T23:59:59.000Z
and Science; M.S., Texas A&M University Chair of Advisory Committee: Dr. John L. Junkins Novel methods of system identification are developed in this dissertation. First set of methods are designed to realize time varying linear dynamical system models... SYSTEM IDENTIFICATION: TIME VARYING AND NONLINEAR METHODS A Dissertation by MANORANJAN MAJJI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree...
A new pseudo time for geopressured aquifers
Villegas, Mauricio Eduardo
1992-01-01T23:59:59.000Z
A NEW PSEUDO TIME FOR GEOPRESSURED AQUIFERS A Thesis by MAURICIO EDUARDO VILLEGAS 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 1992... Major Subject: Petroleum Engineering A NEW PSEUDO TIME METHOD FOR GEOPRESSURED AQUIFERS A Thesis by MAURICIO EDUARDO VILLEGAS Approved as to style and content by: Dr. Robert A. Watte ger (Chair of Comm ee) Dr. James E. Russell (Member) Dr...
REAL TIME SYSTEM OPERATIONS 2006-2007
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.
Entanglement arrow of time in the multiverse
Salvador Robles-Perez
2012-04-07T23:59:59.000Z
In this paper it is presented the model of a multiverse made up of entangled pairs of universes. The arrow of time obtained from the principles of thermodynamics and the arrow of time given by the thermodynamics of entanglement for single universes are analyzed. The latter requires that the single universes expand once they have crossed the quantum barrier at the Euclidean regime. The possible relationship with respect to the grow of local structures in a single universe is also discussed.
Time Extraction from Real-time Generated Football Reports Markus Borg
Time Extraction from Real-time Generated Football Reports Markus Borg D02, Lund Institute information from football match reports generated through minute- by-minute reporting. By using regular ex is presented. 1 Introduction Football reports written in real-time is an increas- ingly popular way to report
Kent, University of
are driving modern real-time control systems from centralized to decentralized architec- tures for the validation and verification of real- time control systems. This paper introduces an algorith- mic methodology to translate the state space visualization of a centralized real-time control system to a decentralized one
Real Time Search User Behavior Real time search is an increasingly important area of
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
Approximate Response Time for Fixed Priority Real-Time Systems with Energy-Harvesting
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
Unfolding of time Petri nets for quantitative time analysis Medesu Sogbohossou and David Delfieu
Paris-Sud XI, Universit de
are interesting formalism with expressing power of true parallelism or concurrency in discrete events systems. Time Petri nets (TPN) [1] are timed extension often used to modelize realtime systems. Thanks://www.irccyn.ec-nantes.fr Abstract. The verification of properties on a Time Petri net is often based on the state class graph
Metastring Theory and Modular Space-time
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.
Time-dependent generalized polynomial chaos
Gerritsma, Marc, E-mail: M.I.Gerritsma@TUDelft.n [Department of Aerospace Engineering, TU Delft (Netherlands); Steen, Jan-Bart van der, E-mail: jan-bart-vander.steen@siemens.co [Siemens Nederland N.V., Prinses Beatrixlaan 800 , P.O. Box 16068, 2500 BB The Hague (Netherlands); Vos, Peter, E-mail: Belgium.peter.vos@vito.b [Flemish Institute for Technological Research (VITO), Unit Environmental Modelling, Boeretang 200, 2400 Mol (Belgium); Karniadakis, George, E-mail: gk@dam.brown.ed [Division of Applied Mathematics, Brown University, Providence, RI 02912 (United States)
2010-11-01T23:59:59.000Z
Generalized polynomial chaos (gPC) has non-uniform convergence and tends to break down for long-time integration. The reason is that the probability density distribution (PDF) of the solution evolves as a function of time. The set of orthogonal polynomials associated with the initial distribution will therefore not be optimal at later times, thus causing the reduced efficiency of the method for long-time integration. Adaptation of the set of orthogonal polynomials with respect to the changing PDF removes the error with respect to long-time integration. In this method new stochastic variables and orthogonal polynomials are constructed as time progresses. In the new stochastic variable the solution can be represented exactly by linear functions. This allows the method to use only low order polynomial approximations with high accuracy. The method is illustrated with a simple decay model for which an analytic solution is available and subsequently applied to the three mode Kraichnan-Orszag problem with favorable results.
UCSF tomography: An integrated software suite for real-time electron microscopic tomographic
Agard, David
suite provides full automation from data collec- tion to real-time reconstruction by which the three pixel images which are subsequently computationally binned four- fold for the on-line reconstruction improving both productivity and efficiency of system resources. The total time from start of data collection
Time-Resolved Research (XSD-TRR) | Advanced Photon Source
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), 2002; Level:5(Million Cubic Feet) Oregon (Including Vehicle Fuel) (MillionStructural Basis of WntSupportB 18B()The57 Please note that3 IrimpanTime to Start3,
Relative entropy and waiting times for continuous-time Markov processes
Jean-Rene Chazottes; Cristian Giardina; Frank Redig
2005-12-16T23:59:59.000Z
For discrete-time stochastic processes, there is a close connection between return/waiting times and entropy. Such a connection cannot be straightforwardly extended to the continuous-time setting. Contrarily to the discrete-time case one does need a reference measure and so the natural object is relative entropy rather than entropy. In this paper we elaborate on this in the case of continuous-time Markov processes with finite state space. A reference measure of special interest is the one associated to the time-reversed process. In that case relative entropy is interpreted as the entropy production rate. The main results of this paper are: almost-sure convergence to relative entropy of suitable waiting-times and their fluctuation properties (central limit theorem and large deviation principle).
First passage time statistics of Brownian motion with purely time dependent drift and diffusion
Molini, Annalisa; Katul, Gabriel G; Porporato, Amilcare
2010-01-01T23:59:59.000Z
Systems where resource availability approaches a critical threshold are common to many engineering and scientific applications and often necessitate the estimation of first passage time statistics of a Brownian motion (Bm) driven by time-dependent drift and diffusion coefficients. Modeling such systems requires solving the associated Fokker-Planck equation subject to an absorbing barrier. Conditional probabilities are classically derived via the method of images, whose applicability to time-dependent problems, including stochastic resonance, is discussed. First passage time statistics, such as the survival probabilities and first passage time densities are obtained analytically. The analysis includes the study of different functional forms of the time dependent drift and diffusion, such as power-law time dependence and different periodic drivers. As a case study of these theoretical results, a stochastic model for snow melt in mountain regions is presented where both temperature effects and snow-precipitation...
Wisconsin at Madison, University of
Modes ALS Primary Section BIOLOGICAL SYSTEMS ENGINEERING Office of the Registrar Curricular Services 04 the class note to ensure that it is describing the method of delivery and any other key information Modes ALS Primary Section FOREST AND WILDLIFE ECOLOGY Office of the Registrar Curricular Services 04
Nonlinear Time Domain Modeling and Simulation of Surface and...
Office of Environmental Management (EM)
Nonlinear Time Domain Modeling and Simulation of Surface and Embedded NPPS Nonlinear Time Domain Modeling and Simulation of Surface and Embedded NPPS Nonlinear Time Domain Modeling...
How to Request & Access Beam Time | Stanford Synchrotron Radiation...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
How to Request & Access Beam Time Step 1: Submit a proposal that summarizes proposed research plans. Step 2: Submit beam time requests. Step 3: Review & accept beam time...
Thermoacoustic instability - a dynamical system and time domain analysis
Sayadi, Taraneh; Schmid, Peter; Richecoeur, Franck; Massot, Marc
2013-01-01T23:59:59.000Z
This study focuses on the Rijke tube problem, which includes features relevant to the modeling of thermoacoustic coupling in reactive flows: a compact acoustic source, an empirical model for the heat source, and nonlinearities. This system features both linear and nonlinear flow regimes with complex dynamical behavior. In order to synthesize accurate time-series, we tackle this problem from a numerical point-of-view, and start by proposing a dedicated solver designed for dealing with the underlying stiffness, in particular, the retarded time and the discontinuity at the location of the heat source. Stability analysis is performed on the limit of the low amplitude perturbations by means of the projection method proposed by Jarlebring (2008), which alleviates the linearization of the retarded term. The results are then compared to the analytical solution of the undamped system, in addition to the analysis based on Galerkin projection. The method provides insight into the consequence of the simplification due to...
Short Time Cycles of Purely Quantum Refrigerators
Tova Feldmann; Ronnie Kosloff
2012-04-18T23:59:59.000Z
Four stroke Otto refrigerator cycles with no classical analogue are studied. Extremely short cycle times with respect to the internal time scale of the working medium characterize these refrigerators. Therefore these cycles are termed sudden. The sudden cycles are characterized by the stable limit cycle which is the invariant of the global cycle propagator. During their operation the state of the working medium possesses significant coherence which is not erased in the equilibration segments due to the very short time allocated. This characteristic is reflected in a difference between the energy entropy and the Von Neumann entropy of the working medium. A classification scheme for sudden refrigerators is developed allowing simple approximations for the cooling power and coefficient of performance.
Risk-adjusted monitoring of survival times
Sego, Landon H.; Reynolds, Marion R.; Woodall, William H.
2009-02-26T23:59:59.000Z
We consider the monitoring of clinical outcomes, where each patient has a dierent risk of death prior to undergoing a health care procedure.We propose a risk-adjusted survival time CUSUM chart (RAST CUSUM) for monitoring clinical outcomes where the primary endpoint is a continuous, time-to-event variable that may be right censored. Risk adjustment is accomplished using accelerated failure time regression models. We compare the average run length performance of the RAST CUSUM chart to the risk-adjusted Bernoulli CUSUM chart, using data from cardiac surgeries to motivate the details of the comparison. The comparisons show that the RAST CUSUM chart is more efficient at detecting a sudden decrease in the odds of death than the risk-adjusted Bernoulli CUSUM chart, especially when the fraction of censored observations is not too high. We also discuss the implementation of a prospective monitoring scheme using the RAST CUSUM chart.
Continuous, real time microwave plasma element sensor
Woskov, Paul P. (4 Ledgewood Dr., Bedford, MA 01730); Smatlak, Donna L. (10 Village Hill Rd., Belmont, MA 02178); Cohn, Daniel R. (26 Walnut Hill Rd., Chestnut Hill, MA 02167); Wittle, J. Kenneth (1740 Conestoga Rd., Chester Springs, PA 19425); Titus, Charles H. (323 Echo Valley La., Newton Square, PA 19072); Surma, Jeffrey E. (806 Brian La., Kennewick, WA 99337)
1995-01-01T23:59:59.000Z
Microwave-induced plasma 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.
Continuous, real time microwave plasma element sensor
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.
Measurable Maximal Energy and Minimal Time Interval
Eiman Abou El Dahab; Abdel Nasser Tawfik
2014-01-14T23:59:59.000Z
The possibility of finding the measurable maximal energy and the minimal time interval is discussed in different quantum aspects. It is found that the linear generalized uncertainty principle (GUP) approach gives a non-physical result. Based on large scale Schwarzshild solution, the quadratic GUP approach is utilized. The calculations are performed at the shortest distance, at which the general relativity is assumed to be a good approximation for the quantum gravity and at larger distances, as well. It is found that both maximal energy and minimal time have the order of the Planck time. Then, the uncertainties in both quantities are accordingly bounded. Some physical insights are addressed. Also, the implications on the physics of early Universe and on quantized mass are outlined. The results are related to the existence of finite cosmological constant and minimum mass (mass quanta).
Time-delayed quantum feedback control
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.
Time-temperature equivalence in Martensite tempering
Hackenberg, Robert E. [Los Alamos National Laboratory; Thomas, Grant A. [CSM; Speer, John G. [CSM; Matlock, David K. [CSM; Krauss, George [CSM
2008-06-16T23:59:59.000Z
The relationship between time and temperature is of great consequence in many materials-related processes including the tempering of martensite. In 1945, Hollomon and Jaffe quantified the 'degree of tempering' as a function of both tempering time, t, and tempering temperature, T, using the expression, T(log t + c). Here, c is thought to be a material constant and appears to decrease linearly with increasing carbon content. The Hollomon-Jaffe tempering parameter is frequently cited in the literature. This work reviews the original derivation of the tempering parameter concept, and presents the use of the characteristics diffusion distance as an alternative time-temperature relationship during martensite tempering. During the tempering of martensite, interstitial carbon atoms diffuse to form carbides. In addition, austenite decomposes, dislocations and grain boundaries rearrange, associated with iron self diffusion. Since these are all diffusional processes, it is reasonable to expect the degree of tempering to relate to the extent of diffusion.
Real time gamma-ray signature identifier
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.
Doppler effect of time and space
Giovanni Zanella
2012-08-30T23:59:59.000Z
This paper shows as the relativistic Doppler effect can be extended also to time and space associated to moving bodies. This extension derives from the analysis of the wave-fronts of the light emitted by a moving source in inertial motion in the empty space, as viewed from the stationary reference. Indeed, time and space can be represented by the same vector quantities, which appear asymmetrical in forward and back direction along the path of the moving body. Consequently, the whole size of the moving bodies dilates along the direction of their motion, as their path. Thought experiments and real facts demonstrate this issue.
Emergent Time and the M5-Brane
C. M. Hull; N. Lambert
2014-03-18T23:59:59.000Z
We consider the maximal super-Yang-Mills theory in 5 Euclidean dimensions with SO(5) R-symmetry and 16 supersymmetries. We argue that the strong coupling limit of this theory (with a possible UV completion) has an emergent time dimension and gives a description of the 5+1 dimensional Lorentz invariant (2,0) theory of the M5-brane, compactified on a timelike circle with radius R=g^2/4\\pi^2 . Our discussion involves issues of quantization of Euclidean theories without time.
Deriving time from the geometry of space
James M. Chappell; John G. Hartnett; Nicolangelo Iannella; Derek Abbott
2015-04-08T23:59:59.000Z
The Minkowski formulation of special relativity reveals the essential four-dimensional nature of spacetime, consisting of three space and one time dimension. Recognizing its fundamental importance, a variety of arguments have been proposed over the years attempting to derive the Minkowski spacetime structure from fundamental physical principles. In this paper we illustrate how Minkowski spacetime follows naturally from the geometric properties of three dimensional Clifford space modeled with multivectors. This approach also generalizes spacetime to an eight dimensional space as well as doubling the size of the Lorentz group. This description of spacetime also provides a new geometrical interpretation of the nature of time.
Time-dependent angularly averaged inverse transport
Guillaume Bal; Alexandre Jollivet
2009-05-07T23:59:59.000Z
This paper concerns the reconstruction of the absorption and scattering parameters in a time-dependent linear transport equation from knowledge of angularly averaged measurements performed at the boundary of a domain of interest. We show that the absorption coefficient and the spatial component of the scattering coefficient are uniquely determined by such measurements. We obtain stability results on the reconstruction of the absorption and scattering parameters with respect to the measured albedo operator. The stability results are obtained by a precise decomposition of the measurements into components with different singular behavior in the time domain.
Dead-time Corrected Disdrometer Data
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
Bartholomew, Mary Jane
Original and dead-time corrected disdrometer results for observations made at SGP and TWP. The correction is based on the technique discussed in Sheppard and Joe, 1994. In addition, these files contain calculated radar reflectivity factor, mean Doppler velocity and attenuation for every measurement for both the original and dead-time corrected data at the following wavelengths: 0.316, 0.856, 3.2, 5, and 10cm (W,K,X,C,S bands). Pavlos Kollias provided the code to do these calculations.
Decoherence in time evolution of bound entanglement
Zhe Sun; Xiaoguang Wang; Y. B. Gao; C. P. Sun
2007-01-15T23:59:59.000Z
We study a dynamic process of disentanglement by considering the time evolution of bound entanglement for a quantum open system, two qutrits coupling to a common environment. Here, the initial quantum correlations of the two qutrits are characterized by the bound entanglement. In order to show the universality of the role of environment on bound entanglement, both bosonic and spin environments are considered. We found that the bound entanglement displays collapses and revivals, and it can be stable against small temperature and time change. The thermal fluctuation effects on bound entanglement are also considered.
Short rise time intense electron beam generator
Olson, Craig L. (Albuquerque, NM)
1987-01-01T23:59:59.000Z
A generator for producing an intense relativistic 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.
Short rise time intense electron beam generator
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.
Part-Time Farming in Northeast Texas.
Martin, James R.; Southern, John H.
1961-01-01T23:59:59.000Z
to costs and labor expended. On all part-time farms, gross sales averaged $1,623, cash farm expenses averaged $1,420 and net sales averaged only $203. The median value of farm sales was only $680. Other farm income items, including mineral and rent... charge of 6 percent interest on total investments as well as a depreciation charge, returns to family labor and management averaged $421. The major economic employment activity reported by part-time farm operators was wage or salary work. Such work...
Rehabilitating space-times with NUTs
Clment, Grard; Guenouche, Mourad
2015-01-01T23:59:59.000Z
We revisit the Taub-NUT solution of the Einstein equations without time periodicity condition, showing that the Misner string is still fully transparent for geodesics. In this case, analytic continuation can be carried out through both horizons leading to a Hausdorff spacetime without a central singularity, and thus geodesically complete. Furthermore, we show that, in spite of the presence of a region containing closed time-like curves, there are no closed causal {\\em geodesics}. Thus, some longstanding obstructions to accept the Taub-NUT solution as physically relevant are removed.
Rehabilitating space-times with NUTs
Grard Clment; Dmitri Gal'tsov; Mourad Guenouche
2015-08-30T23:59:59.000Z
We revisit the Taub-NUT solution of the Einstein equations without time periodicity condition, showing that the Misner string is still fully transparent for geodesics. In this case, analytic continuation can be carried out through both horizons leading to a Hausdorff spacetime without a central singularity, and thus geodesically complete. Furthermore, we show that, in spite of the presence of a region containing closed time-like curves, there are no closed causal {\\em geodesics}. Thus, some longstanding obstructions to accept the Taub-NUT solution as physically relevant are removed.
Miller, William H.
Quantum time evolution in time-dependent fields and time-independent reactive is suggested for accurate large-scale quantum dynamics simulations. The time-dependent Schrodinger equation with finite time-dependent interaction terms is replaced by an inhomogeneous equation with imaginary boundary
Real-time Pricing Demand Response in Operations
Widergren, Steven E.; Marinovici, Maria C.; Berliner, Teri; Graves, Alan
2012-07-26T23:59:59.000Z
AbstractDynamic pricing schemes have been implemented in commercial and industrial application settings, and recently they are getting attention for application to residential customers. Time-of-use and critical-peak-pricing rates are in place in various regions and are being piloted in many more. These programs are proving themselves useful for balancing energy during peak periods; however, real-time (5 minute) pricing signals combined with automation in end-use systems have the potential to deliver even more benefits to operators and consumers. Besides system peak shaving, a real-time pricing system can contribute demand response based on the locational marginal price of electricity, reduce load in response to a generator outage, and respond to local distribution system capacity limiting situations. The US Department of Energy (DOE) is teaming with a mid-west electricity service provider to run a distribution feeder-based retail electricity market that negotiates with residential automation equipment and clears every 5 minutes, thus providing a signal for lowering or raising electric consumption based on operational objectives of economic efficiency and reliability. This paper outlines the capability of the real-time pricing system and the operational scenarios being tested as the system is rolled-out starting in the first half of 2012.
Mean Field Variational Approximations in Continuous-Time Markov Processes
Friedman, Nir
Mean Field Variational Approximations in Continuous-Time Markov Processes A thesis submitted Processes . . . . . . . . . . . . . . . . . . . 18 2.3 Continuous Time Markov Processes-component Representation - Continuous Time Bayesian Networks . 24 2.3.3 Inference in Continuous Time Markov Processes
Relative timing of solar flares observed at different wavelengths
A. Veronig; B. Vrsnak; M. Temmer; A. Hanslmeier
2002-08-05T23:59:59.000Z
The timing of 503 solar flares observed simultaneously in hard X-rays, soft X-rays and H-alpha is analyzed. We investigated the start and the peak time differences in different wavelengths, as well as the differences between the end of the hard X-ray emission and the maximum of the soft X-ray and H-alpha emission. In more than 90% of the analyzed events, a thermal preheating seen in soft X-rays is present prior to the impulsive flare phase. On average, the soft X-ray emission starts 3 min before the hard X-ray and the H-alpha emission. No correlation between the duration of the preheating phase and the importance of the subsequent flare is found. Furthermore, the duration of the preheating phase does not differ for impulsive and gradual flares. For at least half of the events, the end of the nonthermal emission coincides well with the maximum of the thermal emission, consistent with the beam-driven evaporation model. On the other hand, for about 25% of the events there is strong evidence for prolonged evaporation beyond the end of the hard X-rays. For these events, the presence of an additional energy transport mechanism, most probably thermal conduction, seems to play an important role.
Time-saving Cutting-edge practice
Cai, Long
Pedigree Pioneering Longevity Time-saving Cutting-edge practice Superb teaching resources-based Dentistry Providing your institution with the perfect combination of pedigree, longevity, cutting-edge to 1999 Immediate impact: top 5 in immediacy index (June 2013)* Impact factor: 0.811** *Immediacy index
Timely PTS Applications Critical to Staying Navy
Timely PTS Applications Critical to Staying Navy Navy Personnel Command (NPC) is reminding commands and Sailors that submitting Perform to Serve (PTS) applications is the key to being able to stay Navy/10 explains how PTS is used to shape the Navy, and includes all business rules concerning. Commands must
Materials Engineering Research Colloquium Time Presenter Title
British Columbia, University of
, University of British Columbia Research Summary: As the phase scale of a material changes, so does its. #12;Materials Engineering Research Colloquium April 2007 Schedule: Time Presenter Title 10:30 D. Azizi-Alizamini Microstructural Evolution and Mechanical Properties of Ultrafine Grained Low Carbon
Time-Frequency Analysis as Probabilistic Inference
Turner, Richard E.
2014-11-06T23:59:59.000Z
) and (19) yields: (21) 6176 IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 62, NO. 23, DECEMBER 1, 2014 Fig. 1. Relationships between classical and probabilistic time-frequency anal- ysis. A complex filter bank (cFB, ) is formed from a set of filters...
Protist Web Alert Memories of Times Past
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
Performance Prediction through Time Measurements Roman Iakymchuk
of predicting performance of linear algebra algorithms for small matrices. This approach is based on reducing linear algebra operations such as the BLAS subroutines. As the time measurements confirmed, the execution is built on top of two BLAS subroutines, with the separately measured one. The applicability
Precision-Timed (PRET) Stephen A. Edwards
2007. (Source: Reuters) Precision-Timed (PRET) Machines p. 6/1 #12;Certification in Avionics Rather { actfreq 1 do leftJet(leftMotor); actfreq 1 do rightJet(rightMotor); exitfreq 1 do point(goPoint); exitfreq
METHODOLOGY. TIME DISTRIBUTION OF MOSSBAUER SCATTERED RADIATION
Paris-Sud XI, Universit de
METHODOLOGY. TIME DISTRIBUTION OF MOSSBAUER SCATTERED RADIATION H. DROST, K. PALOW and G. WEYER distribution en temps du rayonnement reemis par un absorbant Mossbauer. Des effets d'interference dus a l la reponse de 1'absorbant. Les mesures ont et6 realisees avec le rayonnement Mossbauer a 14.4 keV du
PRELIMINARY TIME ESTIMATES FOR CORING OPERATIONS
., under contract with the National Science Foundation. Funding for the program is provided by the following agencies: Department of Energy, Mines and Resources (Canada) Deutsche ForschungsgemeinschaftPRELIMINARY TIME ESTIMATES FOR CORING OPERATIONS Ocean Drilling Program Texas A&M University
Time interleaved counter analog to digital converters
Danesh, Seyed Amir Ali
2011-11-22T23:59:59.000Z
The work explores extending time interleaving in A/D converters, by applying a high-level of parallelism to one of the slowest and simplest types of data-converters, the counter ADC. The motivation for the work is to ...
Real Time Grid Reliability Management 2005
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.
Nonlinear time-series analysis revisited
Elizabeth Bradley; Holger Kantz
2015-03-25T23:59:59.000Z
In 1980 and 1981, two pioneering papers laid the foundation for what became known as nonlinear time-series analysis: the analysis of observed data---typically univariate---via dynamical systems theory. Based on the concept of state-space reconstruction, this set of methods allows us to compute characteristic quantities such as Lyapunov exponents and fractal dimensions, to predict the future course of the time series, and even to reconstruct the equations of motion in some cases. In practice, however, there are a number of issues that restrict the power of this approach: whether the signal accurately and thoroughly samples the dynamics, for instance, and whether it contains noise. Moreover, the numerical algorithms that we use to instantiate these ideas are not perfect; they involve approximations, scale parameters, and finite-precision arithmetic, among other things. Even so, nonlinear time-series analysis has been used to great advantage on thousands of real and synthetic data sets from a wide variety of systems ranging from roulette wheels to lasers to the human heart. Even in cases where the data do not meet the mathematical or algorithmic requirements to assure full topological conjugacy, the results of nonlinear time-series analysis can be helpful in understanding, characterizing, and predicting dynamical systems.
Baton Rouge Complex Steam Real Time Optimization
Iyun, T.
2014-01-01T23:59:59.000Z
Baton Rouge Complex Steam Real Time Optimization IETC 2014 New Orleans, Louisiana Tope Iyun ExxonMobil Chemical Company May 22, 2014 ESL-IE-14-05-32 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20...
APPLICATION FOR ADMISSION Part-time Program
Martin, Jeff
) related to this program area: Professional designation(s): 275 Portage Avenue | Winnipeg | Manitoba | R3B research into program enrolment and related statistical profiling activities. If you have any questionsAPPLICATION FOR ADMISSION Part-time Program ADMISSION REQUIREMENTS: To qualify for admission
General Information 1. Indicate time spent
Pittendrigh, Barry
General Information 1. Indicate time spent: On a computer at work: ____ hours per day On a computer at home: ____ hours per day On a handheld computer (e.g., Blackberry): ____ hours per day 2. Desktop or laptop computer Use: (circle applicable) My work computer is a: desktop laptop My home computer is a
Backward time behavior of dissipative PDE
Dascaliuc, Radu
2007-04-25T23:59:59.000Z
We study behavior for negative times t of the 2D periodic Navier-Stokes equations and Burgers' original model for turbulence. Both systems are proved to have rich sets of solutions that exist for all t - R and increase exponentially...
Segmenting Time Series for Weather Forecasting
Sripada, Yaji
for generating textual summaries. Our algorithm has been implemented in a weather forecast generation system. 1 presentation, aid human understanding of the underlying data sets. SUMTIME is a research project aiming turbines. In the domain of meteorology, time series data produced by numerical weather prediction (NWP
Time-Symmetric Rolling Tachyon Profile
Matheson Longton
2015-05-04T23:59:59.000Z
We investigate the tachyon profile of a time-symmetric rolling tachyon solution to open string field theory. We algebraically construct the solution of [arXiv:0707.4472] at 6th order in the marginal parameter, and numerically evaluate the corresponding tachyon profile as well as the action and several correlation functions containing the equation of motion. We find that the marginal operator's singular self-OPE is properly regularized and all quantities we examine are finite. In contrast to the widely studied time-asymmetric case, the solution depends nontrivially on the strength of the deformation parameter. For example, we find that the number and period of oscillations of the tachyon field changes as the strength of the marginal deformation is increased. We use the recent renormalization scheme of [arXiv:1412.3466], which contains two free parameters. At finite deformation parameter the tachyon profile depends on these parameters, while when the deformation parameter is small, the solution becomes insensitive to them and behaves like previously studied time-asymmetric rolling tachyon solutions. We also show that convergence of perturbation series is not as straightforward as in the time-asymmetric case with regular OPE, and find evidence that it may depend on the renormalization constants.
Introducing Real-time Interactions Neil Henderson
Newcastle upon Tyne, University of
This report forms the deliverable for Activity I.35 which was to create a formal model to show University of Newcastle, Newcastle upon Tyne, NE1 7RU, UK. Abstract This report introduces a new rigorous notation called Real-time Interactions that can be used to model the interactions between a system and its
PROTECTING INFRASTRUCTURE ASSETS FROM REAL-TIME
Burmester, Mike
to critical infrastructure assets. The paper defines a threat model, an- alyzes vulnerabilities, proposes in an electricity grid. Also, it discusses the impact of run-time attacks on TC-compliant critical infrastructure. The crucial nature of the services provided by critical infrastructure systems and the vulnerabilities found
It's About Time: Realtime Logics Reviewed ? ??
Henzinger, Thomas A.
time verification problem in polynomial space, or even decidable. 1 Introduction The execution of a reactive system in (linear) temporal logic. 3 The modelchecking problem asks, given a reactive system and a temporal for of temporal logic is not dominant: if a reactive system is given as a product of B¨uchi automata, the model
Research Article Human Brain Activity Time-
Zacks, Jeffrey M.
Research Article Human Brain Activity Time- Locked to Narrative Event Boundaries Nicole K. Speer to or reading descriptions of everyday activities (e.g., reading about a person making cookies; Speer & Zacks, 2005; Speer, Zacks, & Reynolds, 2006). These findings are not altogether surprising given theories
OF HEALTH CARE IN TURBULENT TIMES
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
Space-time attributes of physical objects and the laws of space-time physics
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.
Timing analysis of PWR fuel pin failures
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.
Veeravalli, Venugopal
Demodulation Outer Decoder Y = Nt HX + Z Space-Time Coding: Signal Processing Toolbox Rate vs. Reliability vs Code: An example MISO 2x1 Channel: y = 2 [h1 h2]X + z Channel Capacity: I(X; y|H) = log(1 + 2 ||H||2): Beamforming Example of use of finite rate feedback: MISO 4 x 1 No Feedback: Full diversity with = 3 4 Antenna
London, Rebecca A.; Mauldon, Jane G.
2006-01-01T23:59:59.000Z
WPRP Time Running Out: A Portrait of California FamiliesG. Mauldon November 2006 Time Running Out: A Portrait of
Horizontal structure of winter time 250 mb jet stream variations on the fifteen day time scale
Park, Sangwook
1993-01-01T23:59:59.000Z
The horizontal structure of the 250 mb jet stream on the fifteen-day time scale during Northern Hemisphere winter is presented. The winter season is divided into six fifteen-day periods for the 24-year NMC data set. The fifteen-day time...
Tunneling time in attosecond experiments and time-energy uncertainty relation
Ossama Kullie
2015-07-24T23:59:59.000Z
In this work we present a theoretical model supported with a physical reasoning leading to a relation which performs an excellent estimation for the tunneling time in attosecond and strong field experiments, where we address the important case of the He-atom \\cite{Eckle:2008s,Eckle:2008}. Our tunneling time estimation is found by utilizing the time-energy uncertainty relation and represents a quantum clock. The tunneling time is also featured as the time of passage (at the exit of the tunnel) similarly to the Einstein's {\\it photon box Gedanken experiment}. Our work tackles an important study case for the theory of time in quantum mechanics and is very promising for the search for a (general) time operator in quantum mechanics. The work can be seen as a new fundamental step in dealing with the tunneling time in strong field and ultra-fast science, and is appealing for more elaborate treatments using quantum wave packet dynamics and especially for complex atoms and molecules.
Horizontal structure of winter time 250 mb jet stream variations on the fifteen day time scale
Park, Sangwook
1993-01-01T23:59:59.000Z
The horizontal structure of the 250 mb jet stream on the fifteen-day time scale during Northern Hemisphere winter is presented. The winter season is divided into six fifteen-day periods for the 24-year NMC data set. The fifteen-day time...
A Real-time Framework for Model Predictive Control of Continuous-Time Nonlinear Systems
Sontag, Eduardo
for piecewise constant NMPC of continuous-time processes. Index Terms-- nonlinear model predictive control, real-time optimization, optimal control, piecewise constant control I. INTRODUCTION Model predictive control (MPC horizon, open-loop optimal control problem. The unprecedented industrial success of MPC ap- proaches based
Quantitative analysis of real-time systems using priced timed automata
Doyen, Laurent
Aalborg Universitet 9220 Aalborg ? Denmark The problems of time-dependent behavior in general- tional key quantities include energy and mem- ory consumption, in communication networks required band for a given production are crucial quantities. The extended notion of priced or weighted timed automata has
Can biomass time series be reliably assessed from CPUE time series data Francis Lalo1
Hawai'i at Manoa, University of
1 Can biomass time series be reliably assessed from CPUE time series data only? Francis Lalo1 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
On hitting times and fastest strong stationary times for skip-free and more general chains
Fill, James Allen
integers as state space is a chain for which upward jumps may be only of unit size; there is no restriction-free chain and any d, the passage time distribution from state 0 to state d. When the nonzero eigenvalues j of the generator on {0, . . . , d}, with d made absorbing, are all real, their result states that the passage time
Managing Contention and Timing Constraints in a RealTime Database System \\Lambda
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
The maximum time interval of time-lapse photography for monitoring construction operations
Choi, Ji Won
2005-11-01T23:59:59.000Z
THE MAXIMUM TIME INTERVAL OF TIME-LAPSE PHOTOGRAPHY FOR MONITORING CONSTRUCTION OPERATIONS A Thesis by JI WON CHOI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... CHOI Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style and content by...
REAL-TIME DISPATCHING OF GUIDED AND UNGUIDED AUTOMOBILE SERVICE UNITS WITH SOFT TIME WINDOWS
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
Science All NYT HOME PAGE MY TIMES TODAY'S PAPER VIDEO MOST POPULAR TIMES TOPICS
Suslick, Kenneth S.
Science All NYT Science HOME PAGE MY TIMES TODAY'S PAPER VIDEO MOST POPULAR TIMES TOPICS Get Home said the sparks of light gave the opportunity to do spectroscopy, looking for specific colors of light light produced by rubbing -- goes back at least four centuries to Sir Francis Bacon, the English
Nordic Journal of Computing 10(2003), 135. TIMED CSP = CLOSED TIMED -AUTOMATA
Ouaknine, Joël
2003-01-01T23:59:59.000Z
) which may then be verified using the model checker FDR. We characterize the expressive power to ver- ify specifications on certain dense-time systems using the model checker FDR2 [23, 24-based approach for Timed CSP is that verification can be carried out on the model checker FDR, as dis- cussed
Nordic Journal of Computing 10(2003), 1--35. TIMED CSP = CLOSED TIMED #AUTOMATA
Ouaknine, Joël
2003-01-01T23:59:59.000Z
) which may then be verified using the model checker FDR. We characterize the expressive power to ver ify specifications on certain densetime systems using the model checker FDR 2 [23, 24based approach for Timed CSP is that verification can be carried out on the model checker FDR, as dis cussed
Environmental education: A time of change, a time for change Matt Keene a,
Blumstein, Daniel T.
Environmental education: A time of change, a time for change Matt Keene a, *, Daniel T. Blumstein b,1 a United States Environmental Protection Agency, 1200 Pennsylvania Avenue, NW (1807T) Washington, 621 Young Drive South, Los Angeles, CA 90095-1606, United States The field of environmental education
Time at the Royal Observatory The rotation of the Earth gives us two kinds of time (1) ordinary
Glass, Ian S.
Time at the Royal Observatory ISG STAR TIME The rotation of the Earth gives us two kinds of time (1) ordinary Sun-related time of 24 hours and (2) Sidereal time relating to the stars. This means that a star's position in the sky is always the same at the same sidereal time. A sidereal day is shorter by about four
03.612 Time Off for Voting. 1. Purpose. To provide staff members a reasonable period of time off
03.612 Time Off for Voting. 1. Purpose. To provide staff members a reasonable period of time off a reasonable period of time off during the regular work day for voting on an official election day. This time should be reported as time worked and is not charged against vacation leave, comp time or salary
Mak, Brian Kan-Wing
Robust Speaker Verification Using Short-Time Frequency with Long-Time Window and Fusion of Multi, the feature analysis of short-time frequency with long-time window (SFLW) is a compact feature characteristics and long- time resolution at the same time. Secondly, the fusion of multi-resolutions is used
One-time pad booster for Internet
Geraldo A. Barbosa
2007-04-11T23:59:59.000Z
One-time pad encrypted files can be sent through Internet channels using current Internet protocols. However, the need for renewing shared secret keys make this method unpractical. This work shows how users can use a fast physical random generator based on fluctuations of a light field and the Internet channel to directly boost key renewals. The transmitted signals are deterministic but carries imprinted noise that cannot be eliminated by the attacker. Thus, a one-time pad for Internet can be made practical. Security is achieved without third parties and not relying on the difficulty of factoring numbers in primes. An informational fragility to be avoided is discussed. Information-theoretic analysis is presented and bounds for secure operation are determined.
Visualizations for Real-time Pricing Demonstration
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 systems 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.
LHC RF System Time-Domain Simulation
Mastorides, T.; Rivetta, C.; /SLAC
2010-09-14T23:59:59.000Z
Non-linear time-domain simulations have been developed for the Positron-Electron Project (PEP-II) and the Large Hadron Collider (LHC). These simulations capture the dynamic behavior of the RF station-beam interaction and are structured to reproduce the technical characteristics of the system (noise contributions, non-linear elements, and more). As such, they provide useful results and insight for the development and design of future LLRF feedback systems. They are also a valuable tool for the study of diverse longitudinal beam dynamics effects such as coupled-bunch impedance driven instabilities and single bunch longitudinal emittance growth. Results from these studies and related measurements from PEP-II and LHC have been presented in multiple places. This report presents an example of the time-domain simulation implementation for the LHC.
Modern space-time and undecidability
Rodolfo Gambini; Jorge Pullin
2008-01-16T23:59:59.000Z
The picture of space-time that Minkowski created in 1907 has been followed by two important developments in physics not contained in the original picture: general relativity and quantum mechanics. We will argue that the use of concepts of those theories to construct space-time implies conceptual modifications in quantum mechanics. In particular one can construct a viable picture of quantum mechanics without a reduction process that has outcomes equivalent to a picture with a reduction process. One therefore has two theories that are entirely equivalent experimentally but profoundly different in the description of reality they give. This introduces a fundamental level of undecidability in physics of a kind that has not been present before. We discuss some of the implications.
Time scales in nuclear giant resonances
WD Heiss; RG Nazmitdinov; FD Smit
2009-12-18T23:59:59.000Z
We propose a general approach to characterise fluctuations of measured cross sections of nuclear giant resonances. Simulated cross sections are obtained from a particular, yet representative self-energy which contains all information about fragmentations. Using a wavelet analysis, we demonstrate the extraction of time scales of cascading decays into configurations of different complexity of the resonance. We argue that the spreading widths of collective excitations in nuclei are determined by the number of fragmentations as seen in the power spectrum. An analytic treatment of the wavelet analysis using a Fourier expansion of the cross section confirms this principle. A simple rule for the relative life times of states associated with hierarchies of different complexity is given.
Energy and time in open quantum systems
H. Eleuch; I. Rotter
2015-06-02T23:59:59.000Z
The eigenvalues of a non-Hermitian Hamilton operator are complex and provide not only the energies but also the lifetimes of the states of the system. They show non-analytical changes under the influence of singular (exceptional) points. The eigenfunctions are biorthogonal, characterized quantitatively by the so-called phase rigidity, which is reduced near to exceptional points. Numerical studies show the influence of these singular points on the dynamics of open quantum systems. When two states are neighboring in energy or lifetime, they cause a stabilization of the system which is irreversible; change the time behavior of the system; and create local structures that can be described well by a Hermitian Hamilton operator. In these structures, the relation between time and energy is hidden.
Long Time Evolution of Phase Oscillator Systems
Edward Ott; Thomas M. Antonsen
2009-04-16T23:59:59.000Z
It is shown, under weak conditions, that the dynamical evolution of an important class of large systems of globally coupled, heterogeneous frequency, phase oscillators is, in an appropriate physical sense, time-asymptotically attracted toward a reduced manifold of system states. This manifold, which is invariant under the system evolution, was previously known and used to facilitate the discovery of attractors and bifurcations of such systems. The result of this paper establishes that attractors for the order parameter dynamics obtained by restriction to this reduced manifold are, in fact, the only such attractors of the full system. Thus all long time dynamical behavior of the order parameters of these systems can be obtained by restriction to the reduced manifold.
Y. M. Cho
2007-03-02T23:59:59.000Z
We present a topological classification of vacuum space-time. Assuming the 3-dimensional space allows a global chart, we show that the static vacuum space-time of Einstein's theory can be classified by the knot topology $\\pi_3(S^3)=\\pi_3(S^2)$. Viewing Einstein's theory as a gauge theory of Lorentz group and identifying the gravitational connection as the gauge potential of Lorentz group, we construct all possible vacuum gravitational connections which give a vanishing curvature tensor. With this we show that the vacuum connection has the knot topology, the same topology which describes the multiple vacua of SU(2) gauge theory. We discuss the physical implications of our result in quantum gravity.
Boltzmann babies in the proper time measure
Bousso, Raphael; Bousso, Raphael; Freivogel, Ben; Yang, I-Sheng
2007-12-20T23:59:59.000Z
After commenting briefly on the role of the typicality assumption in science, we advocate a phenomenological approach to the cosmological measure problem. Like any other theory, a measure should be simple, general, well defined, and consistent with observation. This allows us to proceed by elimination. As an example, we consider the proper time cutoff on a geodesic congruence. It predicts that typical observers are quantum fluctuations in the early universe, or Boltzmann babies. We sharpen this well-known youngness problem by taking into account the expansion and open spatial geometry of pocket universes. Moreover, we relate the youngness problem directly to the probability distribution for observables, such as the temperature of the cosmic background radiation. We consider a number of modifications of the proper time measure, but find none that would make it compatible with observation.
Development of picoseconds Time of Flight systems in Meson Test Beam Facility at Fermilab
Ronzhin, A.; Albrow, M.; Demarteau, M.; Los, S.; /Fermilab; Malik, S.; /Rockefeller U.; Pronko, S.; Ramberg, E.; /Fermilab; Zatserklyaniy, A.; /Puerto Rico U., Mayaguez
2010-11-01T23:59:59.000Z
The goal of the work is to develop time of flight (TOF) system with about 10 picosecond time resolution in real beam line when start and stop counters separated by some distance. We name the distance as 'base' for the TOF. This 'real' TOF setup is different from another one when start and stop counters located next to each other. The real TOF is sensitive to beam momentum spread, beam divergence, etc. Anyway some preliminary measurements are useful with close placement of start and stop counter. We name it 'close geometry'. The work started about 2 years ago at Fermilab Meson Test Beam Facility (MTBF). The devices tested in 'close geometry' were Microchannel Plate Photomultipliers (MCP PMT) with Cherenkov radiators. TOF counters based on Silicon Photomultipliers (SiPms) with Cherenkov radiators also in 'close geometry' were tested. We report here new results obtained with the counters in the MTBF at Fermilab, including beam line data.
Part-Time Farming in Northeast Texas.
Martin, James R.; Southern, John H.
1961-01-01T23:59:59.000Z
JANUARY THE AGRICULTURAL AND MECHANICAL COLLEGE OF TEXAS TEXAS AGRICULTURAL EXPERIMENT STATION R. D. LEWIS, DIRECTOR, COLLEGE STATION. TEXAS IN COOPERATION WITH THE U. S. DEPARTMENT OF AGRICULTURE 632320 - This analysis of part-the farming... is part of a broad the income levels, income sources and farm and human patterns of the.88,W rural o area of Northeast Texas (Tearas Agricultural Bulletin 940, Incomes of Rural Families in No A major farm adjustmen part-time farming, or a greater...
Proton Emission Times in Spectator Fragmentation
C. Schwarz; for the ALADIN collaboration
2000-09-05T23:59:59.000Z
Proton-proton correlations from spectator decays following Au + Au collisions at 1000 AMeV have been measured with an highly efficient detector hodoscope. The constructed correlation functions indicate a moderate expansion and low breakup densities similar to assumptions made in statistical multifragmentation models. In agreement with a volume breakup rather short time scales were deduced employing directional cuts in proton-proton correlations.
Alexander N. Jourjine
2010-03-12T23:59:59.000Z
We develop further the formalism of the non-Abelian gauge field theory on a cell complex space-time and show how the gauge-invariant action and the equations of motion for gauge fields interacting with spinors can be written without a reference to the geometrical nature of the cells of the cell complex. The general results are illustrated with examples of solutions of equations of motion for U(N) and SU(N) gauge groups.
Time changes in gradient and observed winds
Carlson, Ronald Dale
1972-01-01T23:59:59.000Z
OF FIGURES. 1. INXRODUCTION. 2. BACKGROUND AND STATEI'U':NT OF THE PROBLEM. . a. Previous studies. b. Statement of the problem. c. Objectives. 3. THEORETICAL CONSIDERATIONS. a. Gradient wind equation. b. Time rate-of-change of the gradient wind. . 4... for curvature of the height contours on the upper-level synoptic charts. Of the forces and accelerations contained in the complete horizontal equations of motion, those which do not appear in the gradient wind approximation are the frictional force...
Real Time Monitoring: Achieving Energy Efficiency
Rouse, S.
ABSTRACT: IECBO?s International Conference for Enhanced Building Operations November 17-18, 2009 Austin, Texas. Energy @ Work www.Energy-Efficiency.com File: Rouse_ Abstract Contact: scott.rouse@energy-efficiency....com, (416) 402-0525 Proposal Type: o Electronic proposal for presentation Title of Paper: o Real Time Monitoring: Achieving Energy Efficiency! Conference: o ICEBO?s International Conference for Enhanced Building Operations Submitted by: o...
Real Time Monitoring: Achieving Energy Efficiency
Rouse, S.
2009-01-01T23:59:59.000Z
International Conference for Enhanced Building Operations November 17-18, 2009 Austin, Texas. Energy @ Work www.Energy-Efficiency.com File: Rouse_ Abstract Contact: scott.rouse@energy-efficiency.com, (416) 402...-0525 Proposal Type: o Electronic proposal for presentation Title of Paper: o Real Time Monitoring: Achieving Energy Efficiency! Conference: o ICEBO?s International Conference for Enhanced Building Operations Submitted by: o Scott Rouse, P. Eng...
Cosmological Time Dilation in Gamma Ray Bursts?
David Band
1994-07-01T23:59:59.000Z
Norris et al. (1994) report that the temporal structure of faint gamma ray bursts is longer than that of bright bursts, as expected for time dilation in the cosmological models of burst origin. I show that the observed trends can easily be produced by a burst luminosity function and thus may not result from cosmological effects. A cosmological signature may be present, but the tests Norris et al. present are not powerful enough to detect these signatures.
Real-Time Demand Side Energy Management
Victor, A.; Brodkorb, M.
2006-01-01T23:59:59.000Z
Real-Time Demand Side Energy Management Annelize Victor Michael Brodkorb Sr. Business Consultant Business Development Manager Aspen Technology, Inc. Aspen Technology Espaa, S.A. Houston, TX Barcelona, Spain ABSTRACT To remain... competitive, manufacturers must capture opportunities to increase bottom-line profitability. The goal of this paper is to present a new methodology for reducing energy costs Demand-Side Energy Management. Learn how process manufacturers assess energy...
Timing analysis of PWR fuel pin failures
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
Research has been 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 bumup, 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-PFL/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 bumup. Using peaking factors commensurate widi actual bumups would result in longer intervals for both reactor designs. This document also contains appendices A through J of this report.
PEP-II injection timing and controls
Bharadwaj, V.; Browne, M.; Crane, M.; Gromme, T.; Himel, T.; Ross, M.; Stanek, M. [Stanford Linear Accelerator Center, Menlo Park, CA (United States); Ronan, M. [Lawrence Berkeley National Lab., CA (United States)
1997-07-01T23:59:59.000Z
Hardware has been built and software written and incorporated in the existing SLC accelerator control system to control injection of beam pulses from the accelerator into the PEP-II storage rings currently under construction. Hardware includes a CAMAC module to delay the machine timing fiducial in order that a beam pulse extracted from a damping ring will be injected into a selected group of four 476 MHz buckets in a PEP-II ring. Further timing control is accomplished by shifting the phase of the bunches stored in the damping rings before extraction while leaving the phase of the PEP-II stored beam unchanged. The software which drives timing devices on a pulse-to-pulse basis relies on a dedicated communication link on which one scheduling microprocessor broadcasts a 128-bit message to all distributed control microprocessors at 360 Hz. PEP-II injection will be driven by the scheduling microprocessor according to lists specifying bucket numbers in arbitrary order, and according to scheduling constraints maximizing the useful beam delivered to the SLC collider currently in operation. These lists will be generated by a microprocessor monitoring the current stored per bucket in each of the PEP-II rings.
Jacobi's Principle and the Disappearance of Time
Sean B. Gryb
2010-02-23T23:59:59.000Z
Jacobi's action principle is known to lead to a problem of time. For example, the timelessness of the Wheeler-DeWitt equation can be seen as resulting from using Jacobi's principle to define the dynamics of 3-geometries through superspace. In addition, using Jacobi's principle for non-relativistic particles is equivalent classically to Newton's theory but leads to a time-independent Schrodinger equation upon Dirac quantization. In this paper, we study the mechanism for the disappearance of time as a result of using Jacobi's principle in these simple particle models. We find that the path integral quantization very clearly elucidates the physical mechanism for the timeless of the quantum theory as well as the emergence of duration at the classical level. Physically, this is the result of a superposition of clocks which occurs in the quantum theory due to a sum over all histories. Mathematically, the timelessness is related to how the gauge fixing functions impose the boundary conditions in the path integral.
Real Time Simulation of Power Grid Disruptions
Chinthavali, Supriya [ORNL; Dimitrovski, Aleksandar D [ORNL; Fernandez, Steven J [ORNL; Groer, Christopher S [ORNL; Nutaro, James J [ORNL; Olama, Mohammed M [ORNL; Omitaomu, Olufemi A [ORNL; Shankar, Mallikarjun [ORNL; Spafford, Kyle L [ORNL; Vacaliuc, Bogdan [ORNL
2012-11-01T23:59:59.000Z
DOE-OE and DOE-SC workshops (Reference 1-3) identified the key power grid problem that requires insight addressable by the next generation of exascale computing is coupling of real-time data streams (1-2 TB per hour) as the streams are ingested to dynamic models. These models would then identify predicted disruptions in time (2-4 seconds) to trigger the smart grid s self healing functions. This project attempted to establish the feasibility of this approach and defined the scientific issues, and demonstrated example solutions to important smart grid simulation problems. These objectives were accomplished by 1) using the existing frequency recorders on the national grid to establish a representative and scalable real-time data stream; 2) invoking ORNL signature identification algorithms; 3) modeling dynamically a representative region of the Eastern interconnect using an institutional cluster, measuring the scalability and computational benchmarks for a national capability; and 4) constructing a prototype simulation for the system s concept of smart grid deployment. The delivered ORNL enduring capability included: 1) data processing and simulation metrics to design a national capability justifying exascale applications; 2) Software and intellectual property built around the example solutions; 3) demonstrated dynamic models to design few second self-healing.
Real-time applications of neural nets
Spencer, J.E.
1989-05-01T23:59:59.000Z
Producing, accelerating and colliding very high power, low emittance beams for long periods is a formidable problem in real-time control. As energy has grown exponentially in time so has the complexity of the machines and their control systems. Similar growth rates have occurred in many areas, e.g., improved integrated circuits have been paid for with comparable increases in complexity. However, in this case, reliability, capability and cost have improved due to reduced size, high production and increased integration which allow various kinds of feedback. In contrast, most large complex systems (LCS) are perceived to lack such possibilities because only one copy is made. Neural nets, as a metaphor for LCS, suggest ways to circumvent such limitations. It is argued that they are logically equivalent to multi-loop feedback/forward control of faulty systems. While complimentary to AI, they mesh nicely with characteristics desired for real-time systems. Such issues are considered, examples given and possibilities discussed. 21 refs., 6 figs.
DEPENDABLEDISTRIBUTEDANDMOBILECOMPUTING UTILIZING TIME TO ENHANCE RECOVERY
Neves, Nuno
storage. After a failure, the application rolls back to the last state that was saved and starts its re and Zwaenepoel, 1987) (Neves et al., 1994) (Strom and Yemini, 1985) (Wang and Fuchs, 1993) (Wang and Fuchs, 1992
Self-Organized Forest-Fires near the Critical Time
J. van den Berg; R. Brouwer
2004-12-24T23:59:59.000Z
We consider a forest-fire model which, somewhat informally, is described as follows: Each site (vertex) of the square lattice is either vacant or occupied by a tree.Vacant sites become occupied at rate 1. Further, each site is hit by lightningat rate lambda. This lightning instantaneously destroys (makes vacant) the occupied cluster of the site. This model is closely related to the Drossel-Schwabl forest-fire model, which has received much attention in the physics literature. The most interesting behaviour seems to occur when the lightning rate goes to zero. In the physics literature it is believed that then the system has so-called self-organized critical behaviour. We let the system start with all sites vacant and study, for positive but small lambda,the behaviour near the `critical time' tc; that is, the time after which in the modified system without lightning an infinite occupied cluster would emerge. Intuitively one might expect that if, for fixed t > tc, we let simultaneously lambda tend to 0 and m to infinity, the probability that some tree at distance smaller than m from O is burnt before time t goes to 1. However, we show that under a percolation-like assumption (which we can not prove but believe to be true) this intuition is false. We compare with the case where the square lattice is replaced by the directed binary tree, and pose some natural open problems.
Reachability Analysis of Time Basic Petri Nets: a Time Coverage Approach
Bellettini, Carlo
2011-01-01T23:59:59.000Z
We introduce a technique for reachability analysis of Time-Basic (TB) Petri nets, a powerful formalism for real- time systems where time constraints are expressed as intervals, representing possible transition firing times, whose bounds are functions of marking's time description. The technique consists of building a symbolic reachability graph relying on a sort of time coverage, and overcomes the limitations of the only available analyzer for TB nets, based in turn on a time-bounded inspection of a (possibly infinite) reachability-tree. The graph construction algorithm has been automated by a tool-set, briefly described in the paper together with its main functionality and analysis capability. A running example is used throughout the paper to sketch the symbolic graph construction. A use case describing a small real system - that the running example is an excerpt from - has been employed to benchmark the technique and the tool-set. The main outcome of this test are also presented in the paper. Ongoing work, ...
Efficient discrete-time simulations of continuous-time quantum query algorithms
R. Cleve; D. Gottesman; M. Mosca; R. D. Somma; D. L. Yonge-Mallo
2008-11-26T23:59:59.000Z
The continuous-time query model is a variant of the discrete query model in which queries can be interleaved with known operations (called "driving operations") continuously in time. Interesting algorithms have been discovered in this model, such as an algorithm for evaluating nand trees more efficiently than any classical algorithm. Subsequent work has shown that there also exists an efficient algorithm for nand trees in the discrete query model; however, there is no efficient conversion known for continuous-time query algorithms for arbitrary problems. We show that any quantum algorithm in the continuous-time query model whose total query time is T can be simulated by a quantum algorithm in the discrete query model that makes O[T log(T) / log(log(T))] queries. This is the first upper bound that is independent of the driving operations (i.e., it holds even if the norm of the driving Hamiltonian is very large). A corollary is that any lower bound of T queries for a problem in the discrete-time query model immediately carries over to a lower bound of \\Omega[T log(log(T))/log (T)] in the continuous-time query model.
Short- and Long- Time Transport Structures in a Three Dimensional Time Dependent Flow
Rodolphe Chabreyrie; Stefan G. Llewellyn Smith
2014-05-08T23:59:59.000Z
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 lateral oscillations and a weak Ekman pumping. The difference is mainly the existence of regular or extremely slowly developing chaotic regions that are only present at short time.
Non-intersecting squared Bessel paths: critical time and double scaling limit
A. B. J. Kuijlaars; A. Martinez-Finkelshtein; F. Wielonsky
2010-11-04T23:59:59.000Z
We consider the double scaling limit for a model of $n$ non-intersecting squared Bessel processes in the confluent case: all paths start at time $t=0$ at the same positive value $x=a$, remain positive, and are conditioned to end at time $t=1$ at $x=0$. After appropriate rescaling, the paths fill a region in the $tx$--plane as $n\\to \\infty$ that intersects the hard edge at $x=0$ at a critical time $t=t^{*}$. In a previous paper (arXiv:0712.1333), the scaling limits for the positions of the paths at time $t\
Nanosecond-scale timing jitter in transition edge sensors at telecom and visible wavelengths
Antia Lamas-Linares; Brice Calkins; Nathan A. Tomlin; Thomas Gerrits; Adriana E. Lita; Joern Beyer; Richard P. Mirin; Sae Woo Nam
2012-09-25T23:59:59.000Z
Transition edge sensors (TES) have the highest reported efficiencies (>98%) for detection of single photons in the visible and near infrared. Experiments in quantum information and foundations of physics that rely critically on this efficiency have started incorporating these detectors into con- ventional quantum optics setups. However, their range of applicability has been hindered by slow operation both in recovery time and timing jitter. We show here how a conventional tungsten-TES can be operated with jitter times of < 4 ns, well within the timing resolution necessary for MHz clocking of experiments, and providing an important practical simplification for experiments that rely on the simultaneous closing of both efficiency and locality loopholes.
Response time satisfaction in real-time knowledge-based systems
Frank, Deborah Lee
1990-01-01T23:59:59.000Z
-324. 10. Kirk, D. B. , Cromwell, M. E. , and Donnell, M. L. A Real-Time Advisory System for Airborne Early Warning. In Applications of Artificial Intelligence, Proceedings SPIE 786, 1987, pp. 371-377. 11. Laffey, T. J. , Preston, C. A. , Schmidt, J. L... and reinitialized. The dynamic scheduler, on the other hand, was always present during system operation, and would schedule tasks as they occurred, updating the schedule each time. Early real-time systems used static schedulers. The scheduler had analytic...
Controlled short residence time coal liquefaction process
Anderson, Raymond P. (Overland Park, KS); Schmalzer, David K. (Englewood, CO); Wright, Charles H. (Overland Park, KS)
1982-05-04T23:59:59.000Z
Normally solid dissolved coal product and a distillate liquid product are produced by continuously passing a feed slurry comprising raw feed coal and a recycle solvent oil and/or slurry together with hydrogen to a preheating-reaction zone (26, alone, or 26 together with 42), the hydrogen pressure in the preheating-reaction zone being at least 1500 psig (105 kg/cm.sup.2), reacting the slurry in the preheating-reaction zone (26, or 26 with 42) at a temperature in the range of between about 455.degree. and about 500.degree. C. to dissolve the coal to form normally liquid coal and normally solid dissolved coal. A total slurry residence time is maintained in the reaction zone ranging from a finite value from about 0 to about 0.2 hour, and reaction effluent is continuously and directly contacted with a quenching fluid (40, 68) to substantially immediately reduce the temperature of the reaction effluent to below 425.degree. C. to substantially inhibit polymerization so that the yield of insoluble organic matter comprises less than 9 weight percent of said feed coal on a moisture-free basis. The reaction is performed under conditions of temperature, hydrogen pressure and residence time such that the quantity of distillate liquid boiling within the range C.sub.5 -455.degree. C. is an amount at least equal to that obtainable by performing the process under the same conditions except for a longer total slurry residence time, e.g., 0.3 hour. Solvent boiling range liquid is separated from the reaction effluent and recycled as process solvent.
Elementary wideband timing of radio pulsars
Pennucci, Timothy T. [University of Virginia, Department of Astronomy, P.O. Box 400325 Charlottesville, VA 22904-4325 (United States); Demorest, Paul B.; Ransom, Scott M., E-mail: pennucci@virginia.edu, E-mail: pdemores@nrao.edu, E-mail: sransom@nrao.edu [National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903-2475 (United States)
2014-08-01T23:59:59.000Z
We present an algorithm for the simultaneous measurement of a pulse time-of-arrival (TOA) and dispersion measure (DM) from folded wideband pulsar data. We extend the prescription from Taylor's 1992 work to accommodate a general two-dimensional template 'portrait', the alignment of which can be used to measure a pulse phase and DM. We show that there is a dedispersion reference frequency that removes the covariance between these two quantities and note that the recovered pulse profile scaling amplitudes can provide useful information. We experiment with pulse modeling by using a Gaussian-component scheme that allows for independent component evolution with frequency, a 'fiducial component', and the inclusion of scattering. We showcase the algorithm using our publicly available code on three years of wideband data from the bright millisecond pulsar J18242452A (M28A) from the Green Bank Telescope, and a suite of Monte Carlo analyses validates the algorithm. By using a simple model portrait of M28A, we obtain DM trends comparable to those measured by more standard methods, with improved TOA and DM precisions by factors of a few. Measurements from our algorithm will yield precisions at least as good as those from traditional techniques, but is prone to fewer systematic effects and is without ad hoc parameters. A broad application of this new method for dispersion measure tracking with modern large-bandwidth observing systems should improve the timing residuals for pulsar timing array experiments, such as the North American Nanohertz Observatory for Gravitational Waves.
Time varying, multivariate volume data reduction
Ahrens, James P [Los Alamos National Laboratory; Fout, Nathaniel [UC DAVIS; Ma, Kwan - Liu [UC DAVIS
2010-01-01T23:59:59.000Z
Large-scale supercomputing is revolutionizing the way science is conducted. A growing challenge, however, is understanding the massive quantities of data produced by large-scale simulations. The data, typically time-varying, multivariate, and volumetric, can occupy from hundreds of gigabytes to several terabytes of storage space. Transferring and processing volume data of such sizes is prohibitively expensive and resource intensive. Although it may not be possible to entirely alleviate these problems, data compression should be considered as part of a viable solution, especially when the primary means of data analysis is volume rendering. In this paper we present our study of multivariate compression, which exploits correlations among related variables, for volume rendering. Two configurations for multidimensional compression based on vector quantization are examined. We emphasize quality reconstruction and interactive rendering, which leads us to a solution using graphics hardware to perform on-the-fly decompression during rendering. In this paper we present a solution which addresses the need for data reduction in large supercomputing environments where data resulting from simulations occupies tremendous amounts of storage. Our solution employs a lossy encoding scheme to acrueve data reduction with several options in terms of rate-distortion behavior. We focus on encoding of multiple variables together, with optional compression in space and time. The compressed volumes can be rendered directly with commodity graphics cards at interactive frame rates and rendering quality similar to that of static volume renderers. Compression results using a multivariate time-varying data set indicate that encoding multiple variables results in acceptable performance in the case of spatial and temporal encoding as compared to independent compression of variables. The relative performance of spatial vs. temporal compression is data dependent, although temporal compression has the advantage of offering smooth animations, while spatial compression can handle volumes of larger dimensions.
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Undergraduate Program Time Limits and Work Schedules
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Baton Rouge Complex Steam Real Time Optimization
Iyun, T.
2014-01-01T23:59:59.000Z
Time Optimization IETC 2014 New Orleans, Louisiana Tope Iyun ExxonMobil Chemical Company May 22, 2014 ESL-IE-14-05-32 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20-23, 2014 Proprietary 2 Agenda Baton... 20-23, 2014 Proprietary 3 Baton Rouge Complex BRRF/BRCP One of worlds largest integrated, most technologically advanced petroleum/petrochemical complexes, in operation since 1909 Workforce: over 5,500 Geographic Area : BRCP - 150 acres...
Real-Time Demand Side Energy Management
Victor, A.; Brodkorb, M.
2006-01-01T23:59:59.000Z
Provides periodic energy consumption reports Demand-Side Energy Management Compares actual energy cost against defined dynamic targets Alerts responsible personnel when corrective action is needed Provides a list of recommended actions... stream_source_info ESL-IE-06-05-24.pdf.txt stream_content_type text/plain stream_size 17485 Content-Encoding UTF-8 stream_name ESL-IE-06-05-24.pdf.txt Content-Type text/plain; charset=UTF-8 Real-Time Demand Side Energy...
Holographic Space-time and Newton's Law
Tom Banks; Willy Fischler
2013-10-25T23:59:59.000Z
We derive Newton's Law from the formalism of Holographic Space-Time (HST). More precisely, we show that for a large class of Hamiltonians of the type proposed previously for the HST description of a geodesic in Minkowski space, the eikonal for scattering of two massless particles at large impact parameter scales as expected with the impact parameter and the energies of the particles in the center of mass (CM) frame. We also discuss the criteria for black hole production in this collision, and find an estimate, purely within the HST framework, for the impact parameter at which it sets in, which coincides with the estimate based on general relativity.
Time resolved spin Seebeck effect experiments
Roschewsky, Niklas, E-mail: niklas.roschewsky@wmi.badw.de; Schreier, Michael; Schade, Felix; Ganzhorn, Kathrin; Meyer, Sibylle; Geprgs, Stephan [Walther-Meiner-Institut, Bayerische Akademie der Wissenschaften, Garching (Germany); Kamra, Akashdeep [Walther-Meiner-Institut, Bayerische Akademie der Wissenschaften, Garching (Germany); Kavli Institute of Nanoscience, Delft University of Technology, Delft (Netherlands); Huebl, Hans; Goennenwein, Sebastian T. B. [Walther-Meiner-Institut, Bayerische Akademie der Wissenschaften, Garching (Germany); Nanosystems Initiative Munich (NIM), Munich (Germany); Gross, Rudolf [Walther-Meiner-Institut, Bayerische Akademie der Wissenschaften, Garching (Germany); Physik-Department, Technische Universitt Mnchen, Garching (Germany); Nanosystems Initiative Munich (NIM), Munich (Germany)
2014-05-19T23:59:59.000Z
In this Letter, we present the results of transient thermopower experiments, performed at room temperature on yttrium iron garnet/platinum bilayers. Upon application of a time-varying thermal gradient, we observe a characteristic low-pass frequency response of the ensuing thermopower voltage with cutoff frequencies of up to 37 MHz. We interpret our results in terms of the spin Seebeck effect, and argue that small wavevector magnons are of minor importance for the spin Seebeck effect in our thin film hybrid structures.
Time-optimal Control of Spin Systems
Jan Swoboda
2006-01-19T23:59:59.000Z
The paper discusses various aspects of time-optimal control of quantum spin systems, modelled as right-invariant systems on a compact Lie group G. The main results are the reduction of such a system to an equivalent system on a homogeneous space G/H, and the explicit determination of optimal trajectories on G/H in the case where G/H is a Riemannian symmetric space. These results are mainly obtained by using methods from Lie theory and geometric control.
2010-01-01T23:59:59.000Z
of the extensive dialogue trees, puzzles and side-splitting humour. Regardless, these failings can be overlooked by the fact that all the adventures can be downloaded for free from the official Doctor Who website, mainly because youve technically already paid... appear anywhere except in the promotional artwork found on the Doctor Who website. Seriously, how hard is it to programme in a palette swap in this day and age? Developers did it all the time back in the 8-bit era and where would Luigi and Ken be today...
DETECTING MASSIVE GRAVITONS USING PULSAR TIMING ARRAYS
Lee, Kejia; Kramer, Michael [University of Manchester, School of Physics and Astronomy, Jodrell Bank Centre for Astrophysics, Alan Turing Building, Manchester M13 9PL (United Kingdom); Jenet, Fredrick A.; Price, Richard H. [Department of Physics and Astronomy, University of Texas at Brownsville, Brownsville, TX 78520 (United States); Wex, Norbert, E-mail: kjlee@mpifr-bonn.mpg.d [Max-Planck-Institut fuer Radioastronomie, Bonn 53121 (Germany)
2010-10-20T23:59:59.000Z
At the limit of weak static fields, general relativity becomes Newtonian gravity with a potential field that falls off as inverse distance rather than a theory of Yukawa-type fields with a finite range. General relativity also predicts that the speed of disturbances of its waves is c, the vacuum light speed, and is non-dispersive. For these reasons, the graviton, the boson for general relativity, can be considered to be massless. Massive gravitons, however, are features of some alternatives to general relativity. This has motivated experiments and observations that, so far, have been consistent with the zero-mass graviton of general relativity, but further tests will be valuable. A basis for new tests may be the high sensitivity gravitational wave (GW) experiments that are now being performed and the higher sensitivity experiments that are being planned. In these experiments, it should be feasible to detect low levels of dispersion due to non-zero graviton mass. One of the most promising techniques for such a detection may be the pulsar timing program that is sensitive to nano-Hertz GWs. Here, we present some details of such a detection scheme. The pulsar timing response to a GW background with the massive graviton is calculated, and the algorithm to detect the massive graviton is presented. We conclude that, with 90% probability, massless gravitons can be distinguished from gravitons heavier than 3 x 10{sup -22} eV (Compton wavelength {lambda}{sub g} = 4.1 x 10{sup 12} km), if bi-weekly observation of 60 pulsars is performed for 5 years with a pulsar rms timing accuracy of 100 ns. If 60 pulsars are observed for 10 years with the same accuracy, the detectable graviton mass is reduced to 5 x 10{sup -23} eV ({lambda}{sub g} = 2.5 x 10{sup 13} km); for 5 year observations of 100 or 300 pulsars, the sensitivity is respectively 2.5 x 10{sup -22} ({lambda}{sub g} = 5.0 x 10{sup 12} km) and 10{sup -22} eV ({lambda}{sub g} = 1.2 x 10{sup 13} km). Finally, a 10 year observation of 300 pulsars with 100 ns timing accuracy would probe graviton masses down to 3 x 10{sup -23} eV ({lambda}{sub g} = 4.1 x 10{sup 13} km).
Real-time inclinometer using accelerometer MEMS
Hanto, D; Hermanto, B; Puranto, P; Handoko, L T
2011-01-01T23:59:59.000Z
A preliminary design of inclinometer for real-time monitoring system of soil displacement is proposed. The system is developed using accelerometer sensor with microelectromechanical system (MEMS) device. The main apparatus consists of a single MEMS sensor attached to a solid pipe and stucked pependicularly far away below the soil surface. The system utilizes small fractions of electrical signals from MEMS sensor induced by the pipe inclination due to soil displacements below the surface. It is argued that the system is accurate enough to detect soil displacements responsible for landslides, and then realizes a simple and low cost landslide early warning system.
Estimating transition times for a model of
Mitchener, W. Garrett
= mean usage rate of G2 dm dt = birth q(m) - death m 0.0 0.2 0.4 0.6 0.8 1.0 0.2 0.4 0.6 0.8 1.0 Mean at a rate k K Simplify K = 1: Each agent uses G1 (state 0) or G2 (state 1) @ Ck = number youth in state kD = death rate: each time step each adult dies with prob- ability pD = rD N , replaced by sampling from
How many times can LANL reuse water?
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Time Structure of the LANSCE Beam
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Space-Time Insight | Open Energy Information
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Continuous Time Group Discovery in Dynamic Graphs
Miller, K; Eliassi-Rad, T
2010-11-04T23:59:59.000Z
With the rise in availability and importance of graphs and networks, it has become increasingly important to have good models to describe their behavior. While much work has focused on modeling static graphs, we focus on group discovery in dynamic graphs. We adapt a dynamic extension of Latent Dirichlet Allocation to this task and demonstrate good performance on two datasets. Modeling relational data has become increasingly important in recent years. Much work has focused on static graphs - that is fixed graphs at a single point in time. Here we focus on the problem of modeling dynamic (i.e. time-evolving) graphs. We propose a scalable Bayesian approach for community discovery in dynamic graphs. Our approach is based on extensions of Latent Dirichlet Allocation (LDA). LDA is a latent variable model for topic modeling in text corpora. It was extended to deal with topic changes in discrete time and later in continuous time. These models were referred to as the discrete Dynamic Topic Model (dDTM) and the continuous Dynamic Topic Model (cDTM), respectively. When adapting these models to graphs, we take our inspiration from LDA-G and SSN-LDA, applications of LDA to static graphs that have been shown to effectively factor out community structure to explain link patterns in graphs. In this paper, we demonstrate how to adapt and apply the cDTM to the task of finding communities in dynamic networks. We use link prediction to measure the quality of the discovered community structure and apply it to two different relational datasets - DBLP author-keyword and CAIDA autonomous systems relationships. We also discuss a parallel implementation of this approach using Hadoop. In Section 2, we review LDA and LDA-G. In Section 3, we review the cDTM and introduce cDTMG, its adaptation to modeling dynamic graphs. We discuss inference for the cDTM-G and details of our parallel implementation in Section 4 and present its performance on two datasets in Section 5 before concluding in Section 6.
2010-01-01T23:59:59.000Z
Games 7 Adam Kendrick provides a casual and/or hardcore gamers review of City of the Daleks, Blood of the Cybermen and TARDIS. My Top Seven Non-recurring Doctor Who Villains 10 A brief look at those whose villainy is perfectly contained in a single... without knowing what it was stretching its hand for, and not seem to recognize that the fruit it plucked might not have been worth the effort. Tides of Time 34 Michaelmas Term 2010 6 Adam Kendrick provides a casual and/or hardcore gamers review...
Probing the time dependence of dark energy
Barboza Edsio Jr, M. [Departamento de Fsica, Universidade do Estado do Rio Grande do Norte, Rua Professor Antnio Campos s/n, Mossor (Brazil); Alcaniz, J.S., E-mail: edesiobarboza@uern.br, E-mail: alcaniz@on.br [Departamento de Astronomia, Observatrio Nacional, Rua General Jos Cristino 77, Rio de Janeiro (Brazil)
2012-02-01T23:59:59.000Z
A new method to investigate a possible time-dependence of the dark energy equation of state w is proposed. We apply this methodology to a combination of data involving one of the most recent type Ia supernova sample (SNLS3) along with the current baryon acoustic oscillation and H(z) measurements. We show that current observations cannot rule out a non-evolving dark energy component (dw/dz = 0). The approach developed here reduces considerably the so-called smearing effect on w determinations and may be useful to probe a possible evolving dark energy component when applied to upcoming observational data.
Space-Time Block Coding for Frequency-Selective and Time-Varying Channels
Langendoen, Koen
such as channel capacity and reliability [2]. Space-time block coding (STBC) [3], [4] has been introduced for a multiple-input single-output (MISO) system with 2 transmit antennas and 1 receive antenna
Time lapse HDR: time lapse photography with high dynamic range images
Clark, Brian Sean
2005-08-29T23:59:59.000Z
In this thesis, I present an approach to a pipeline for time lapse photography using conventional digital images converted to HDR (High Dynamic Range) images (rather than conventional digital or film exposures). Using this method, it is possible...
Long-time protein folding dynamics from short-time molecular dynamics simulations
Chodera, J D; Swope, W C; Pitera, J W; Dill, Ken A
2006-01-01T23:59:59.000Z
On the simulation of protein folding by short time scaleand W. A. Eaton, The protein folding speed limit, Curr.and T. Head-Gordon, Protein folding by distributed computing
Time to think: The interaction of impulsivity, environment and time perception
Grant, Alison
2011-03-16T23:59:59.000Z
The subjective and contextually variable experience of time is a readily accepted concept. However, few studies have examined how individual differences influence established contextual manipulations of the cognitive mechanisms (attention...
Shores, Kindal Alayne
2006-10-30T23:59:59.000Z
and recreation. Next, the relationship between an individualâ??s time perspective and the benefits they seek from recreation are identified. Using results from a selfadministered mail questionnaire, hypotheses about the benefits sought by adults with different...
Time Reversal in Solids (Linear and Nonlinear Elasticity): Multimedia Resources in Time Reversal
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
Dynamic nonlinear elastic behavior, nonequilibrium dynamics, first observed as a curiosity in earth materials has now been observed in a great variety of solids. The primary manifestations of the behavior are characteristic wave distortion, and slow dynamics, a recovery process to equilibrium that takes place linearly with the logarithm of time, over hours to days after a wave disturbance. The link between the diverse materials that exhibit nonequilibrium dynamics appears to be the presence of soft regions, thought to be 'damage' at many scales, ranging from order 10-9 m to 10-1 m at least. The regions of soft matter may be distributed as in a rock sample, or isolated, as in a sample with a single crack [LANLhttp://www.lanl.gov/orgs/ees/ees11/geophysics/nonlinear/nonlinear.shtml]. The Geophysics Group (EES-11) at Los Alamos National Laboratory has posted two or more multimedia items under each of the titles below to demonstrate aspects of their work: 1) Source Reconstruction Using Time Reversal; 2) Robustness and Efficiency of Time Reversal Acoustics in Solid Media; 3) Audio Example of Time Reversal - Speech Privacy; 4) Crack Imagining with Time Reversal - Experimental Results; 5) Time Reversal of the 2004 (M9.0) Sumatra Earthquake.
Start detector T0 for trigger and time-of-flight systems of the
-ISTC SAC Seminar 6 HMPID PHOS (3/5) ITS TOF TPC Central Barrel || Magnet Research, Russia Moscow Engineering-Physics Institute, Russia Kurchatov Institute, Russia University
Examination of microbial fuel cell start-up times with domestic wastewater and additional amendments
of wastewaters have been tested in recent years, including synthetic, domestic and industrial wastewaters (He et with anaerobic sludge (Kim et al., 2005). Liu and Logan (2004) demonstrated that the single-chamber, air days following inoculation with a mixture of anaerobic and aerobic sludge (Ael- terman et al., 2006
Photon Green Functions in Curved Space-Time
Giuseppe Bimonte; Enrico Calloni; Luciano Di Fiore; Giampiero Esposito; Leopoldo Milano; Luigi Rosa
2005-11-23T23:59:59.000Z
Quantization of electrodynamics in curved space-time in the Lorenz gauge and with arbitrary gauge parameter makes it necessary to study Green functions of non-minimal operators with variable coefficients. Starting from the integral representation of photon Green functions, we link them to the evaluation of integrals involving Gamma-functions. Eventually, the full asymptotic expansion of the Feynman photon Green function at small values of the world function, as well as its explicit dependence on the gauge parameter, are obtained without adding by hand a mass term to the Faddeev-Popov Lagrangian. Coincidence limits of second covariant derivatives of the associated Hadamard function are also evaluated, as a first step towards the energy-momentum tensor in the non-minimal case.
Making web annotations persistent over time
Sanderson, Robert [Los Alamos National Laboratory; Van De Sompel, Herbert [Los Alamos National Laboratory
2010-01-01T23:59:59.000Z
As Digital Libraries (DL) become more aligned with the web architecture, their functional components need to be fundamentally rethought in terms of URIs and HTTP. Annotation, a core scholarly activity enabled by many DL solutions, exhibits a clearly unacceptable characteristic when existing models are applied to the web: due to the representations of web resources changing over time, an annotation made about a web resource today may no longer be relevant to the representation that is served from that same resource tomorrow. We assume the existence of archived versions of resources, and combine the temporal features of the emerging Open Annotation data model with the capability offered by the Memento framework that allows seamless navigation from the URI of a resource to archived versions of that resource, and arrive at a solution that provides guarantees regarding the persistence of web annotations over time. More specifically, we provide theoretical solutions and proof-of-concept experimental evaluations for two problems: reconstructing an existing annotation so that the correct archived version is displayed for all resources involved in the annotation, and retrieving all annotations that involve a given archived version of a web resource.
Testing Time Reversal Symmetry in Artificial Atoms
Frederico Brito; Francisco Rouxinol; M. D. LaHaye; Amir O. Caldeira
2014-06-27T23:59:59.000Z
Over the past several decades, a rich series of experiments has repeatedly verified the quantum nature of superconducting devices, leading some of these systems to be regarded as artificial atoms. In addition to their application in quantum information processing, these `atoms' provide a test bed for studying quantum mechanics in macroscopic limits. Regarding the last point, we present here a feasible protocol for directly testing time reversal symmetry in a superconducting artificial atom. Time reversal symmetry is a fundamental property of quantum mechanics and is expected to hold if the dynamics of the artificial atom strictly follow the Schroedinger equation. However, this property has yet to be tested in any macroscopic quantum system. The test we propose is based on the verification of the microreversibility principle, providing a viable approach to verify quantum work fluctuation theorems - an outstanding challenge in quantum statistical mechanics. For this, we outline a procedure that utilizes the microreversibility test in conjunction with numerical emulations of Gibbs ensembles to verify these theorems over a large temperature range.
Lookback time bounds from energy conditions
Santos, J. [Universidade Federal do Rio Grande do Norte, Departamento de Fisica C.P. 1641, 59072-970 Natal, RN (Brazil); Departamento de Astronomia, Observatorio Nacional, 20921-400, Rio de Janeiro, RJ (Brazil); Centro Brasileiro de Pesquisas Fisicas, 22290-180 Rio de Janeiro, RJ (Brazil); Alcaniz, J. S. [Departamento de Astronomia, Observatorio Nacional, 20921-400, Rio de Janeiro, RJ (Brazil); Reboucas, M. J. [Centro Brasileiro de Pesquisas Fisicas, 22290-180 Rio de Janeiro, RJ (Brazil); Pires, N. [Universidade Federal do Rio Grande do Norte, Departamento de Fisica C.P. 1641, 59072-970 Natal, RN (Brazil)
2007-08-15T23:59:59.000Z
In general relativity, the energy conditions are invoked to restrict general energy-momentum tensors on physical grounds. We show that in the standard Friedmann-Lemaitre-Robertson-Walker (FLRW) approach to cosmological modeling, where the energy and matter components of the cosmic fluid are unknown, the energy conditions provide model-independent bounds on the behavior of the lookback time of cosmic sources as a function of the redshift for any value of the spatial curvature. We derive and confront such bounds with a lookback time sample which is built from the age estimates of 32 galaxies lying in the interval 0.11 < or approx. z < or approx. 1.84 and by assuming the total expanding age of the Universe to be 13.7{+-}0.2 Gyr, as obtained from current cosmic microwave background experiments. In agreement with previous results, we show that all energy conditions seem to have been violated at some point of the recent past of cosmic evolution.
Data challenges of time domain astronomy
Graham, Matthew J; Mahabal, Ashish; Donalek, Ciro; Drake, Andrew; Longo, Giuseppe
2012-01-01T23:59:59.000Z
Astronomy has been at the forefront of the development of the techniques and methodologies of data intensive science for over a decade with large sky surveys and distributed efforts such as the Virtual Observatory. However, it faces a new data deluge with the next generation of synoptic sky surveys which are opening up the time domain for discovery and exploration. This brings both new scientific opportunities and fresh challenges, in terms of data rates from robotic telescopes and exponential complexity in linked data, but also for data mining algorithms used in classification and decision making. In this paper, we describe how an informatics-based approach-part of the so-called "fourth paradigm" of scientific discovery-is emerging to deal with these. We review our experiences with the Palomar-Quest and Catalina Real-Time Transient Sky Surveys; in particular, addressing the issue of the heterogeneity of data associated with transient astronomical events (and other sensor networks) and how to manage and analy...
Statistics of particle time-temperature histories.
Hewson, John C.; Lignell, David O.; Sun, Guangyuan
2014-10-01T23:59:59.000Z
Particles in non - isothermal turbulent flow are subject to a stochastic environment tha t produces a distribution of particle time - temperature histories. This distribution is a function of the dispersion of the non - isothermal (continuous) gas phase and the distribution of particles relative to that gas phase. In this work we extend the one - dimensional turbulence (ODT) model to predict the joint dispersion of a dispersed particle phase and a continuous phase. The ODT model predicts the turbulent evolution of continuous scalar fields with a model for the cascade of fluctuations to smaller sc ales (the 'triplet map') at a rate that is a function of the fully resolved one - dimens ional velocity field . Stochastic triplet maps also drive Lagrangian particle dispersion with finite Stokes number s including inertial and eddy trajectory - crossing effect s included. Two distinct approaches to this coupling between triplet maps and particle dispersion are developed and implemented along with a hybrid approach. An 'instantaneous' particle displacement model matches the tracer particle limit and provide s an accurate description of particle dispersion. A 'continuous' particle displacement m odel translates triplet maps into a continuous velocity field to which particles respond. Particles can alter the turbulence, and modifications to the stochastic rate expr ession are developed for two - way coupling between particles and the continuous phase. Each aspect of model development is evaluated in canonical flows (homogeneous turbulence, free - shear flows and wall - bounded flows) for which quality measurements are ava ilable. ODT simulations of non - isothermal flows provide statistics for particle heating. These simulations show the significance of accurately predicting the joint statistics of particle and fluid dispersion . Inhomogeneous turbulence coupled with the in fluence of the mean flow fields on particles of varying properties alter s particle dispersion. The joint particle - temperature dispersion leads to a distribution of temperature histories predicted by the ODT . Predictions are shown for the lower moments an d the full distributions of the particle positions, particle - observed gas temperatures and particle temperatures. An analysis of the time scales affecting particle - temperature interactions covers Lagrangian integral time scales based on temperature autoco rrelations, rates of temperature change associated with particle motion relative to the temperature field and rates of diffusional change of temperatures. These latter two time scales have not been investigated previously; they are shown to be strongly in termittent having peaked distributions with long tails. The logarithm of the absolute value of these time scales exhibits a distribution closer to normal. A cknowledgements This work is supported by the Defense Threat Reduction Agency (DTRA) under their Counter - Weapons of Mass Destruction Basic Research Program in the area of Chemical and Biological Agent Defeat under award number HDTRA1 - 11 - 4503I to Sandia National Laboratories. The authors would like to express their appreciation for the guidance provi ded by Dr. Suhithi Peiris to this project and to the Science to Defeat Weapons of Mass Destruction program.
Bayesian classification of partially observed outbreaks using time-series data.
Safta, Cosmin; Ray, Jaideep; Crary, David (Applied Research Associates, Inc, Arlington, VA); Cheng, Karen (Applied Research Associates, Inc, Arlington, VA)
2010-05-01T23:59:59.000Z
Results show that a time-series based classification may be possible. For the test cases considered, the correct model can be selected and the number of index case can be captured within {+-} {sigma} with 5-10 days of data. The low signal-to-noise ratio makes the classification difficult for small epidemics. The problem statement is: (1) Create Bayesian techniques to classify and characterize epidemics from a time-series of ICD-9 codes (will call this time-series a 'morbidity stream'); and (2) It is assumed the morbidity stream has already set off an alarm (through a Kalman filter anomaly detector) Starting with a set of putative diseases: Identify which disease or set of diseases 'fit the data best' and, Infer associated information about it, i.e. number of index cases, start time of the epidemic, spread rate, etc.
Chaotic motion at the emergence of the time averaged energy decay
Cesar Manchein; Jane Rosa; Marcus W. Beims
2009-05-29T23:59:59.000Z
A system plus environment conservative model is used to characterize the nonlinear dynamics when the time averaged energy for the system particle starts to decay. The system particle dynamics is regular for low values of the $N$ environment oscillators and becomes chaotic in the interval $13\\le N\\le15$, where the system time averaged energy starts to decay. To characterize the nonlinear motion we estimate the Lyapunov exponent (LE), determine the power spectrum and the Kaplan-Yorke dimension. For much larger values of $N$ the energy of the system particle is completely transferred to the environment and the corresponding LEs decrease. Numerical evidences show the connection between the variations of the {\\it amplitude} of the particles energy time oscillation with the time averaged energy decay and trapped trajectories.
Mitigating the impact of a time-dependent production process
Dudnik, Sara A
2007-01-01T23:59:59.000Z
Value-added processes that bear associated wait times occur frequently during production manufacturing and increase cycle time. Since the wait time is integral to the value created by the process, it can be difficult to ...
Getting Useful Real-Time Feedback About Your Program | Department...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Getting Useful Real-Time Feedback About Your Program Getting Useful Real-Time Feedback About Your Program Getting Useful Real-Time Feedback About Your Program, presentation slides...
Empirical Measurements of Travelers' Value of Travel Time Reliability
Danda, Santosh Rao
2014-08-12T23:59:59.000Z
Travel time and travel time reliability are two fundamental factors influencing travel behavior and demand. The concept of the value of time (VOT) has been extensively studied, and estimates of VOT have been obtained from surveys and empirical data...
Empirical Measurements of Travelers' Value of Travel Time Reliability
Danda, Santosh Rao
2014-08-12T23:59:59.000Z
Travel time and travel time reliability are two fundamental factors influencing travel behavior and demand. The concept of the value of time (VOT) has been extensively studied, and estimates of VOT have been obtained from ...
Tips: Time-Based Electricity Rates | Department of Energy
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Time-Based Electricity Rates Tips: Time-Based Electricity Rates July 27, 2014 - 8:09pm Addthis Time-based electricity programs encourage you to use energy when the demand is low by...
On the Probabilistic Modeling of Runway Inter-departure Times
Balakrishnan, Hamsa
This paperr examines the validity of the Erlang distribution for runway service times. It uses high-fidelity surface surveillance data, for the first time, to model the probability distributions of runway service times and ...
Time-to-Produce, Inventory, and Asset Prices
Chen, Zhanhui
2012-10-19T23:59:59.000Z
In a production-based general equilibrium model, I study the impact of time-to-build and time-to-produce technology constraints and inventory on asset prices and macroeconomic quantity dynamics. A time-to-build constraint ...
Estimation of run times in a freight rail transportation network
Bonsra, Kunal (Kunal Baldev)
2012-01-01T23:59:59.000Z
The objective of this thesis is to improve the accuracy of individual freight train run time predictions defined as the time between departure from an origin node to arrival at a destination node not including yard time. ...
Heating programmer Controls the times the system
Carletta, Jean
that will do that for you. #12;Boiler thermostat Controls the temperature of the water in the system -- which starts in the boiler, goes through the pipes and radiators, and returns to the boiler. The lower you set -- if the water is hot enough. #12;#12;Room thermostat When it thinks the room is warm enough, it tells the boiler
Fall Back Daylight Savings time is November
Linsley, Braddock K.
: http://www.albany.edu/gogreen/energy-campaign.shtml Sustainability Bulletin Office of Environmental campaign was started. Mary Ellen Mallia, the Director of Environmental Sustainability and Indu, the Energy Energy Campaign 1 Change a light campaign 1 2Farmer's Market Sustainability Council 2 Green Products
Re-thinking residential mobility Linking lives through time and space
Coulter, Rory; van Ham, Maarten; Findlay, Allan M.
2015-03-16T23:59:59.000Z
and support exchanges play a central role in the novel forms of resi- dential movement created by demographic and economic restructuring (Mulder, 2007). For example, many young people now move repeatedly in and out of the parental home during the protracted... ; Smart, 2011). Elder et al.s (2003) principles of timing, life- span development and time and place stress the connections binding individual lives to structural conditions (Bailey, 2009). A useful starting point for conceptualizing these connec- tions...
Fractional Topological Phases and Broken Time-Reversal Symmetry...
Office of Scientific and Technical Information (OSTI)
Fractional Topological Phases and Broken Time-Reversal Symmetry in Strained Graphene Prev Next Title: Fractional Topological Phases and Broken Time-Reversal Symmetry in...
Fragment Yields Calculated in a Time-Dependent Microscopic Theory...
Office of Scientific and Technical Information (OSTI)
Fragment Yields Calculated in a Time-Dependent Microscopic Theory of Fission Citation Details In-Document Search Title: Fragment Yields Calculated in a Time-Dependent Microscopic...
National Preparedness Month: A Good Time to Review Community...
Office of Environmental Management (EM)
National Preparedness Month: A Good Time to Review Community Guidelines for Energy Emergencies National Preparedness Month: A Good Time to Review Community Guidelines for Energy...
Steps to Establish a Real-Time Transmission Monitoring System...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Steps to Establish a Real-Time Transmission Monitoring System for Transmission Owners and Operators within the Eastern and Western Interconnections Steps to Establish a Real-Time...
A polynomial-time descent method for separable convex ...
2015-03-21T23:59:59.000Z
Mar 21, 2015 ... it is very unlikely that Meyer's algorithm runs in polynomial time, although no claims on the theoretical time complexity are made in that paper.
Real time speech formant analyzer and display
Holland, George E. (Ames, IA); Struve, Walter S. (Ames, IA); Homer, John F. (Ames, IA)
1987-01-01T23:59:59.000Z
A speech analyzer for interpretation of sound includes a sound input which converts the sound into a signal representing the sound. The signal is passed through a plurality of frequency pass filters to derive a plurality of frequency formants. These formants are converted to voltage signals by frequency-to-voltage converters and then are prepared for visual display in continuous real time. Parameters from the inputted sound are also derived and displayed. The display may then be interpreted by the user. The preferred embodiment includes a microprocessor which is interfaced with a television set for displaying of the sound formants. The microprocessor software enables the sound analyzer to present a variety of display modes for interpretive and therapeutic used by the user.
Normalizing the causality between time series
Liang, X San
2015-01-01T23:59:59.000Z
Recently, a rigorous yet concise formula has been derived to evaluate the information flow, and hence the causality in a quantitative sense, between time series. To assess the importance of a resulting causality, it needs to be normalized. The normalization is achieved through distinguishing three types of fundamental mechanisms that govern the marginal entropy change of the flow recipient. A normalized or relative flow measures its importance relative to other mechanisms. In analyzing realistic series, both absolute and relative information flows need to be taken into account, since the normalizers for a pair of reverse flows belong to two different entropy balances; it is quite normal that two identical flows may differ a lot in relative importance in their respective balances. We have reproduced these results with several autoregressive models. We have also shown applications to a climate change problem and a financial analysis problem. For the former, reconfirmed is the role of the Indian Ocean Dipole as ...
Time-optimal navigation through quantum wind
Dorje C. Brody; Gary W. Gibbons; David M. Meier
2015-02-19T23:59:59.000Z
The quantum navigation problem of finding the time-optimal control Hamiltonian that transports a given initial state to a target state through quantum wind, that is, under the influence of external fields or potentials, is analysed. By lifting the problem from the state space to the space of unitary gates realising the required task, we are able to deduce the form of the solution to the problem by deriving a universal quantum speed limit. The expression thus obtained indicates that further simplifications of this apparently difficult problem are possible if we switch to the interaction picture of quantum mechanics. A complete solution to the navigation problem for an arbitrary quantum system is then obtained, and the behaviour of the solution is illustrated in the case of a two-level system.
Real-time airborne particle analyzer
Reilly, Peter T.A.
2012-10-16T23:59:59.000Z
An aerosol particle analyzer includes a laser ablation chamber, a gas-filled conduit, and a mass spectrometer. The laser ablation chamber can be operated at a low pressure, which can be from 0.1 mTorr to 30 mTorr. The ablated ions are transferred into a gas-filled conduit. The gas-filled conduit reduces the electrical charge and the speed of ablated ions as they collide and mix with buffer gases in the gas-filled conduit. Preferably, the gas filled-conduit includes an electromagnetic multipole structure that collimates the nascent ions into a beam, which is guided into the mass spectrometer. Because the gas-filled conduit allows storage of vast quantities of the ions from the ablated particles, the ions from a single ablated particle can be analyzed multiple times and by a variety of techniques to supply statistically meaningful analysis of composition and isotope ratios.
Real time speech formant analyzer and display
Holland, G.E.; Struve, W.S.; Homer, J.F.
1987-02-03T23:59:59.000Z
A speech analyzer for interpretation of sound includes a sound input which converts the sound into a signal representing the sound. The signal is passed through a plurality of frequency pass filters to derive a plurality of frequency formants. These formants are converted to voltage signals by frequency-to-voltage converters and then are prepared for visual display in continuous real time. Parameters from the inputted sound are also derived and displayed. The display may then be interpreted by the user. The preferred embodiment includes a microprocessor which is interfaced with a television set for displaying of the sound formants. The microprocessor software enables the sound analyzer to present a variety of display modes for interpretive and therapeutic used by the user. 19 figs.
Time scales in nuclear giant resonances
Heiss, W. D. [National Institute for Theoretical Physics, Stellenbosch Institute for Advanced Study, and Institute of Theoretical Physics, University of Stellenbosch, 7602 Matieland (South Africa); Nazmitdinov, R. G. [Department de Fisica, Universitat de les Illes Balears, E-07122 Palma de Mallorca (Spain); Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, RU-141980 Dubna (Russian Federation); Smit, F. D. [iThemba LABS, Post Office Box 722, Somerset West 7129 (South Africa)
2010-03-15T23:59:59.000Z
We propose a general approach to characterise fluctuations of measured cross sections of nuclear giant resonances. Simulated cross sections are obtained from a particular, yet representative, self-energy that contains all information about fragmentations. Using a wavelet analysis, we demonstrate the extraction of time scales of cascading decays into configurations of different complexity of the resonance. We argue that the spreading widths of collective excitations in nuclei are determined by the number of fragmentations as seen in the power spectrum. An analytic treatment of the wavelet analysis using a Fourier expansion of the cross section confirms this principle. A simple rule for the relative lifetimes of states associated with hierarchies of different complexity is given.
Wise, Marcus B. (Kingston, TN); Thompson, Cyril V. (Knoxville, TN)
1998-01-01T23:59:59.000Z
An in-line gas monitor capable of accurate gas composition analysis in a continuous real time manner even under strong applied vacuum conditions operates by mixing an air sample with helium forming a sample gas in two complementary sample loops embedded in a manifold which includes two pairs of 3-way solenoid valves. The sample gas is then analyzed in an ion trap mass spectrometer on a continuous basis. Two valve drivers actuate the two pairs of 3-way valves in a reciprocating fashion, so that there is always flow through the in-line gas monitor via one or the other of the sample loops. The duty cycle for the two pairs of 3-way valves is varied by tuning the two valve drivers to a duty cycle typically between 0.2 to 0.7 seconds.
Wise, M.B.; Thompson, C.V.
1998-07-14T23:59:59.000Z
An in-line gas monitor capable of accurate gas composition analysis in a continuous real time manner even under strong applied vacuum conditions operates by mixing an air sample with helium forming a sample gas in two complementary sample loops embedded in a manifold which includes two pairs of 3-way solenoid valves. The sample gas is then analyzed in an ion trap mass spectrometer on a continuous basis. Two valve drivers actuate the two pairs of 3-way valves in a reciprocating fashion, so that there is always flow through the in-line gas monitor via one or the other of the sample loops. The duty cycle for the two pairs of 3-way valves is varied by tuning the two valve drivers to a duty cycle typically between 0.2 to 0.7 seconds. 3 figs.
Finite-difference time-domain simulation of fusion plasmas at radiofrequency time scales
Smithe, David N. [Tech-X Corporation, 5621 Arapahoe Avenue, Suite A, Boulder, Colorado 80303 (United States)
2007-05-15T23:59:59.000Z
Simulation of dense plasmas in the radiofrequency range are typically performed in the frequency domain, i.e., by solving Laplace-transformed Maxwell's equations. This technique is well-suited for the study of linear heating and quasilinear evolution, but does not generalize well to the study of nonlinear phenomena. Conversely, time-domain simulation in this range is difficult because the time scale is long compared to the electron plasma wave period, and in addition, the various cutoff and resonance behaviors within the plasma insure that any explicit finite-difference scheme would be numerically unstable. To resolve this dilemma, explicit finite-difference Maxwell terms are maintained, but a carefully time-centered locally implicit method is introduced to treat the plasma current, such that all linear plasma dispersion behavior is faithfully reproduced at the available temporal and spatial resolution, despite the fact that the simulation time step may exceed the electron gyro and electron plasma time scales by orders of magnitude. Demonstrations are presented of the method for several classical benchmarks, including mode conversion to ion cyclotron wave, cyclotron resonance, propagation into a plasma-wave cutoff, and tunneling through low-density edge plasma.
Time asymptotics of the Schroedinger wave function in time-periodic potentials
O. Costin; R. D. Costin; J. L. Lebowitz
2006-08-13T23:59:59.000Z
We study the transition to the continuum of an initially bound quantum particle in $\\RR^d$, $d=1,2,3$, subjected, for $t\\ge 0$, to a time periodic forcing of arbitrary magnitude. The analysis is carried out for compactly supported potentials, satisfying certain auxiliary conditions. It provides complete analytic information on the time Laplace transform of the wave function. From this, comprehensive time asymptotic properties (Borel summable transseries) follow. We obtain in particular a criterion for whether the wave function gets fully delocalized (complete ionization). This criterion shows that complete ionization is generic and provides a convenient test for particular cases. When satisfied it implies absence of discrete spectrum and resonances of the associated Floquet operator. As an illustration we show that the parametric harmonic perturbation of a potential chosen to be any nonzero multiple of the characteristic function of a measurable compact set has this property.
Entropy of seismic electric signals: Analysis in natural time under time reversal
Varotsos, P.A.; Skordas, E.S. [Solid State Section, Physics Department, University of Athens, Panepistimiopolis, Zografos 157 84, Athens (Greece); Solid Earth Physics Institute, Physics Department, University of Athens, Panepistimiopolis, Zografos 157 84, Athens (Greece); Sarlis, N.V.; Lazaridou, M.S. [Solid State Section, Physics Department, University of Athens, Panepistimiopolis, Zografos 157 84, Athens (Greece); Tanaka, H.K. [Earthquake Prediction Research Center, Tokai University 3-20-1, Shimizu-Orido, Shizuoka 424-8610 (Japan)
2006-03-15T23:59:59.000Z
Electric signals have been recently recorded at the Earth's surface with amplitudes appreciably larger than those hitherto reported. Their entropy in natural time is smaller than that of a 'uniform' distribution. The same holds for their entropy upon time reversal. Such a behavior, which is also found by numerical simulations in fractional Brownian motion time series and in an on-off intermittency model, stems from infinitely ranged long range temporal correlations and hence these signals are probably seismic electric signal activities (critical dynamics). This classification is strikingly confirmed since three strong nearby earthquakes occurred (which is an extremely unusual fact) after the original submission of the present paper. The entropy fluctuations are found to increase upon approaching bursting, which is reminiscent of the behavior identifying sudden cardiac death individuals when analyzing their electrocardiograms.
Quantization of Space and Time in 3 and in 4 Space-time Dimensions
G. 't Hooft
1996-08-16T23:59:59.000Z
The fact that in Minkowski space, space and time are both quantized does not have to be introduced as a new postulate in physics, but can actually be derived by combining certain features of General Relativity and Quantum Mechanics. This is demonstrated first in a model where particles behave as point defects in 2 space dimensions and 1 time, and then in the real world having 3+1 dimensions. The mechanisms in these two cases are quite different, but the outcomes are similar: space and time form a (non-cummutative) lattice. These notes are short since most of the material discussed in these lectures is based on two earlier papers by the same author (gr-qc/9601014 and gr-qc/9607022), but the exposition given in the end is new.
Trading Bit, Message, and Time Complexity of Distributed Algorithms
Trading Bit, Message, and Time Complexity of Distributed Algorithms Johannes Schneider, Roger present tradeoffs between time complexity t, bit complexity b, and message complexity m. Two communication changing its time and message complexity. We also give techniques for several problems that require a time
Timed CSP: A Retrospective Jo el Ouaknine 1
Ouaknine, Joël
APC 2005 Timed CSP: A Retrospective Jo? el Ouaknine 1 Oxford University Computing Laboratory, UK Timed CSP, from its inception nearly twenty years ago to very recent semantical and algorithmic developments. Key words: Process algebra, Timed CSP. Timed CSP was first proposed in 1986 by Reed and Roscoe
Proposal for Cherenkov Time of Flight Technique with Picosecond Resolution
S. Majewski; A. Margaryan; L. Tang
2005-08-05T23:59:59.000Z
A new particle identification device for Jlab 12 GeV program is proposed. It is based on the measurement of time information obtained by means of a new photon detector and time measuring concept. The expected time measurement precision for the Cherenkov time-of-flight detector is about or less than 10 picosecond for Cherenkov radiators with lengths less than 50 cm.
Verification in Loosely Synchronous Queue-Connected Discrete Timed Automata
Dang, Zhe
, the expressive power of timed automata has many limitations in modeling, since many real-time systems are simply. We look at a model of a queue system that consists of the following components: 1. Two discrete timed model for investigating verification problems of real-time sys- tems (see [1, 30] for surveys). However
Verification in Loosely Synchronous QueueConnected Discrete Timed Automata ?
Dang, Zhe
, the expressive power of timed automata has many limitations in modeling, since many realtime systems are simply. We look at a model of a queue system that consists of the following components: 1. Two discrete timed model for investigating verification problems of realtime sys tems (see [1, 30] for surveys). However
On a Control Algorithm for Time-varying Processor Availability
Gupta, Vijay
On a Control Algorithm for Time-varying Processor Availability Vijay Gupta Department of Electrical control algorithm for the situation when the processor resource availability is time-varying. The basic the processing resources available at every time step. Thus, the system evolves as a discrete time hybrid system
Time Synchronization in Hierarchical TESLA Wireless Sensor Networks
Jason L. Wright; Milos Manic
2009-08-01T23:59:59.000Z
Time synchronization and event time correlation are important in wireless sensor networks. In particular, time is used to create a sequence events or time line to answer questions of cause and effect. Time is also used as a basis for determining the freshness of received packets and the validity of cryptographic certificates. This paper presents secure method of time synchronization and event time correlation for TESLA-based hierarchical wireless sensor networks. The method demonstrates that events in a TESLA network can be accurately timestamped by adding only a few pieces of data to the existing protocol.
Space-time Curvature of Classical Electromagnetism
R. W. M. Woodside
2004-10-08T23:59:59.000Z
The space-time curvature carried by electromagnetic fields is discovered and a new unification of geometry and electromagnetism is found. Curvature is invariant under charge reversal symmetry. Electromagnetic field equations are examined with De Rham co homology theory. Radiative electromagnetic fields must be exact and co exact to preclude unobserved massless topological charges. Weyl's conformal tensor, here called ``the gravitational field'', is decomposed into a divergence-free non-local piece with support everywhere and a local piece with the same support as the matter. By tuning a local gravitational field to a Maxwell field the electromagnetic field's local gravitational field is discovered. This gravitational field carries the electromagnetic field's polarization or phase information, unlike Maxwell's stress-energy tensor. The unification assumes Einstein's equations and derives Maxwell's equations from curvature assumptions. Gravity forbids magnetic monopoles! This unification is stronger than the Einstein-Maxwell equations alone, as those equations must produce the electromagnetic field's local gravitational field and not just any conformal tensor. Charged black holes are examples. Curvature of radiative null electromagnetic fields is characterized.
How Swift is redefining Time Domain Astronomy
Gehrels, Neil
2015-01-01T23:59:59.000Z
NASA's Swift satellite has completed ten years of amazing discoveries in time domain astronomy. Its primary mission is to chase gamma-ray bursts (GRBs), but due to its scheduling flexibility it has subsequently become a prime discovery machine for new types of behavior. The list of major discoveries in GRBs and other transients includes the long-lived X-ray afterglows and flares from GRBs, the first accurate localization of short GRBs, the discovery of GRBs at high redshift (z>8), supernova shock break-out from SN Ib, a jetted tidal disruption event, an ultra-long class of GRBs, high energy emission from flare stars, novae and supernovae with unusual characteristics, magnetars with glitches in their spin periods, and a short GRB with evidence of an accompanying kilonova. Swift has developed a dynamic synergism with ground based observatories. In a few years gravitational wave observatories will come on-line and provide exciting new transient sources for Swift to study.
Optimizing near real time accountability for reprocessing.
Cipiti, Benjamin B.
2010-06-01T23:59:59.000Z
Near Real Time Accountability (NRTA) of actinides at high precision in reprocessing plants has been a long sought-after goal in the safeguards community. Achieving this goal is hampered by the difficulty of making precision measurements in the reprocessing environment, equipment cost, and impact to plant operations. Thus the design of future reprocessing plants requires an optimization of different approaches. The Separations and Safeguards Performance Model, developed at Sandia National Laboratories, was used to evaluate a number of NRTA strategies in a UREX+ reprocessing plant. Strategies examined include the incorporation of additional actinide measurements of internal plant vessels, more use of process monitoring data, and the option of periodic draining of inventory to key tanks. Preliminary results show that the addition of measurement technologies can increase the overall measurement uncertainty due to additional error propagation, so care must be taken when designing an advanced system. Initial results also show that relying on a combination of different NRTA techniques will likely be the best option. The model provides a platform for integrating all the data. The modeling results for the different NRTA options under various material loss conditions will be presented.
Reliable Downlink Scheduling for Wireless Networks with Real-Time and Non-Real Time Clients
Jain, Abhishek
2014-08-05T23:59:59.000Z
is general enough to be implemented in IEEE 802.11e based wireless network [44]. 3.2 Wireless Channel Model We consider fading wireless channel and assume that the channel change over time on the scale of fast fading. The channel is considered to be constant...
Finite-time thermodynamics: Exergya) and optimization of time-constrained processes
Berry, R. Stephen
and for the set of parallel heat engines are found. 1. INTRODUCTION Exergy analysis and other related approaches discuss a way to extend exergy analysis using some re- sults of finite-time thermodynamics, incorporating. It is closely related to the exergy approach but incorporates the irreversible losses due to finite
Time-of-flight optical ranging system based on time-correlated single-photon counting
Buller, Gerald S.
applications in areas as diverse as precision compo- nent inspection, automated assembly, process con- trol high-power laser systems or the placement of retroreflecting spheres on the target. To overcome measurements3,4 and optical time- domain reflectometry in optical fibers.5 In a recent publication6 we
Trivedi, Chintan A.
2010-07-14T23:59:59.000Z
module attached to it, which enables broadband excitation of the sample. This setup allows rapid acquisition (250 ms for fluorescence decay at a wavelength) of time resolved fluorescence data with a high spectral (as low as 0.5 nm) and temporal (as low...
Performance analysis of symbol timing estimators for time-varying MIMO channels
Panduru, Flaviu Gabriel
2004-11-15T23:59:59.000Z
scenarios for synchronization are presented: data-aided (DA) and non-data-aided (NDA). Two models for the fading process are considered: block fading and symbol time-varying fading, respectively, the second case being assumed to be Rayleigh distributed...
URL: http://www.elsevier.nl/locate/entcs/volume68.html 18 pages Timed CSP = Closed Timed Automata 1
Ouaknine, Joël
URL: http://www.elsevier.nl/locate/entcs/volume68.html 18 pages Timed CSP = Closed Timed Automata 1 70118, USA Abstract We study the expressive power of an augmented version of Timed CSP and show constraints. We also show that this new version of Timed CSP is expressive enough to capture the most widely
Cheng, Albert M. K.
, specification, modeling, scheduling, and formal verification of real- time, embedded, and cyber-physical systems-based Formal Verification, Response Time Analysis, and Power-Aware Scheduling Albert M. K. Cheng Real reactive programming, RTL (real-time logic)-based formal verification, response time analysis, and power
Chemical dynamics in time and energy space
Myers, J.D.
1993-04-01T23:59:59.000Z
The development of a versatile picosecond ultraviolet/vacuum ultraviolet temporal spectrometer and its potential use for measuring internal energy redistribution in isolated molecules are described in detail. A detailed description of the double-pass Nd:YAG amplifier and the dye amplifiers is given with the pulse energies achieved in the visible, ultraviolet, and vacuum ultraviolet. The amplified visible pulses are shown to be of sub-picosecond duration and near transform limited. The instrument`s temporal response ({le}10 ps) is derived from an instrument limited measurement of the dissociation lifetime of methyl iodide at 266 nm. The methyl iodide experiment is used to discuss the various sources of noise and background signals that are intrinsic to this type of experiment. Non-time-resolved experiments measuring the branching ratio and kinetic energy distributions of products from the 193 nm photodissociation of cyclopentadiene and thiophene are presented. These studies were done using the molecular beam Photofragment Translational Spectroscopy (PTS) technique. The results from the cyclopentadiene experiment confirm that H atom elimination to yield the cyclopentadienyl radical is the dominant dissociation channel. A barrier of {ge}5 kcal/mol can be understood in terms of the delocalization of the radical electron of the cyclopentadienyl fragment. A concerted elimination yielding cyclopropene and acetylene was also observed and is proposed to occur via a bicyclo-[2.1.0]pent-2-ene intermediate. Two other channels, yielding acetylene plus the CH{sub 2}CHCH triplet carbene, and CH{sub 2} plus 1-buten-3-yne, are postulated to occur via ring opening. The implications of the experimental results for bulk thermal oxidation and pyrolysis models are discussed. The thiophene experiment shows six competing dissociation channels. The postulated intermediates for the various thiophene dissociation channels include bicyclo, ring opened, and possibly ring contracted forms.
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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), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirt DocumentationSitesWeather6Environmental1 |MAgnEtProjects»Getting StartedGetting started Getting
Instrumentation development for real time brainwave monitoring.
Anderson, Lawrence Frederick; Clough, Benjamin W.
2005-12-01T23:59:59.000Z
The human brain functions through a chemically-induced biological process which operates in a manner similar to electrical systems. The signal resulting from this biochemical process can actually be monitored and read using tools and having patterns similar to those found in electrical and electronics engineering. The primary signature of this electrical activity is the ''brain wave'', which looks remarkably similar to the output of many electrical systems. Likewise, the device currently used in medical arenas to read brain electrical activity is the electroencephalogram (EEG) which is synonymous with a multi-channel oscilloscope reading. Brain wave readings and recordings for medical purposes are traditionally taken in clinical settings such as hospitals, laboratories or diagnostic clinics. The signal is captured via externally applied scalp electrodes using semi-viscous gel to reduce impedance. The signal will be in the 10 to 100 microvolt range. In other instances, where surgeons are attempting to isolate particular types of minute brain signals, the electrodes may actually be temporarily implanted in the brain during a preliminary procedure. The current configurations of equipment required for EEGs involve large recording instruments, many electrodes, wires, and large amounts of hard disk space devoted to storing large files of brain wave data which are then eventually analyzed for patterns of concern. Advances in sensors, signal processing, data storage and microelectronics over the last decade would seem to have paved the way for the realization of devices capable of ''real time'' external monitoring, and possible assessment, of brain activity. A myriad of applications for such a capability are likewise presenting themselves, including the ability to assess brain functioning, level of functioning and malfunctioning. Our plan is to develop the sensors, signal processing, and portable instrumentation package which could capture, analyze, and communicate information on brain activity which could be of use to the individual, medical personnel or in other potential arenas. To take this option one step further, one might foresee that the signal would be captured, analyzed, and communicated to a person or device and which would result an action or reaction by that person or device. It is envisioned that ultimately a system would include a sensor detection mechanism, transmitter, receiver, microprocessor and associated memory, and audio and/or visual alert system. If successful in prototyping, the device could be considered for eventual implementation in ASIC form or as a fully integrated CMOS microsystem.
Induction time effects in pulse combustors
Bell, J B; Marcus, D L; Pember, R B
1999-04-09T23:59:59.000Z
Combustion systems that take advantage of a periodic combustion process have many advantages over conventional systems. Their rate of heat transfer is greatly enhanced and their pollutant emissions are lower. They draw in their own supply of fuel and air and they are self-venting. They have few moving parts. The most common type of pulse combustor is based on a Helmholtz resonator - a burning cycle drives a resonant pressure wave, which in turn enhances the rate of combustion, resulting in a self-sustaining, large-scale oscillation. Although the basic physical mechanisms controlling such a process were explained by Rayleigh over a century ago, a full understanding of the operation of a pulse combustor still does not exist. The dominant processes in such a system--combustion, turbulent fluid dynamics, acoustics--are highly coupled and interact nonlinearly, which has reduced the design process to a costly and inefficient trial-and-error procedure. Several recent numerical and experimental studies, however, have been focused towards a better understanding of the basic underlying physics. Barr et al. [l] have elucidated the relative roles of the time scales governing the energy release, the turbulent mixing, and the acoustics. Keller et al. [5] have demonstrated the importance of the phase relation between the resonant pressure field in the tailpipe and the periodic energy release. Marcus et al. [6] have developed the capability for a fully three-dimensional simulation of the reacting flow in a pulse combustor. This paper is an application of that methodology to a detailed investigation of the frequency response of the model to changes in the chemical kinetics. The methodology consists of a fully conservative second-order Godunov algorithm for the inviscid, reacting gas dynamics equations coupled to an adaptive mesh refinement procedure[2]. The axisymmetric and three-dimensional simulations allow us to explore in detail the interaction between the transient fluid dynamics phenomena and the energy release associated with the combustion. For these simulations, we couple a second-order, unsplit Godunov algorithm for the inviscid, reacting gas dynamics equations to an adaptive Cartesian grid scheme[7]. In order to keep computational costs relatively low, we have developed a ''bootstrap'' procedure to initialize progressively higher-dimensional calculations. The quasi-one-dimensional code is run until transient phenomena have subsided and a desirable quasi-steady state has been achieved. The state data is then extrapolated to axisymmetric coordinates and these conditions used to initialize an axisymmetric calculation. The axisymmetric code is then run through several full combustion cycles and the data mapped to initialize a three-dimensional calculation.
Mixing times via super-fast coupling Mixing times via super-fast coupling
Kovchegov, Yevgeniy
(n)) with cut-off asymptotics at 1 2 n log(n). Method used: relatively rarified mathematical residential be improved to match O(n log n) Transpositions a , b called label-to-label. #12;logo Mixing times via super is group invariant if dist(Xm+1|Xm = ) = dist(Xm+1|Xm = -1 ) for all , Sn. In other words, label-to-label
The High Time Resolution Universe Survey VI: An Artificial Neural Network and Timing of 75 Pulsars
Bates, S D; Barsdell, B R; Bhat, N D R; Burgay, M; Burke-Spolaor, S; Champion, D J; Coster, P; D'Amico, N; Jameson, A; Johnston, S; Keith, M J; Kramer, M; Levin, L; Lyne, A; Milia, S; Ng, C; Nietner, C; Possenti, A; Stappers, B; Thornton, D; van Straten, W
2012-01-01T23:59:59.000Z
We present 75 pulsars discovered in the mid-latitude portion of the High Time Resolution Universe survey, 54 of which have full timing solutions. All the pulsars have spin periods greater than 100 ms, and none of those with timing solutions are in binaries. Two display particularly interesting behaviour; PSR J1054-5944 is found to be an intermittent pulsar, and PSR J1809-0119 has glitched twice since its discovery. In the second half of the paper we discuss the development and application of an artificial neural network in the data-processing pipeline for the survey. We discuss the tests that were used to generate scores and find that our neural network was able to reject over 99% of the candidates produced in the data processing, and able to blindly detect 85% of pulsars. We suggest that improvements to the accuracy should be possible if further care is taken when training an artificial neural network; for example ensuring that a representative sample of the pulsar population is used during the training proc...
Removing nuclear waste, one shipment at a time
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Stories Removing nuclear waste, one shipment at a time Removing nuclear waste, one shipment at a time The Lab's 1,000th shipment of transuranic waste recently left Los Alamos,...
Department of Energy to Provide Supercomputing Time to Run NOAA...
climate change models as well as perform near real-time high-impact (non-production) weather prediction research using computing time on DOE Office of Science resources including...
Exploiting run time distributions to compare sequential and parallel ...
Isabel Rosseti,,,,
target value within a given running time, shown on the abscissa axis. Time-to- .... Assuming that T2 ? T1, without loss of generality, we have that: Pr[X1 ? (? +...
Recovery Act Workers Add Time Capsule Before Sealing Reactor...
Office of Environmental Management (EM)
(SRS) placed a time capsule with a cache of timely news items inside a former nuclear reactor this week before sealing the 300,000-square foot facility shut for hundreds of years...
Why are MD simulated protein folding times wrong? Dmitry Nerukh
Nerukh, Dmitry
Why are MD simulated protein folding times wrong? Dmitry Nerukh Unilever Centre for Molecular.ac.uk The question of significant deviations of protein folding times simulated using molecular dynamics from
Looking at Transistor Gate Oxide Formation in Real Time
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Looking at Transistor Gate Oxide Formation in Real Time Looking at Transistor Gate Oxide Formation in Real Time Print Wednesday, 25 June 2008 00:00 The oxide gate layer is critical...
Time resolved single photon imaging in Nanometer Scale CMOS technology
Richardson, Justin Andrew
2010-06-28T23:59:59.000Z
Time resolved imaging is concerned with the measurement of photon arrival time. It has a wealth of emerging applications including biomedical uses such as fluorescence lifetime microscopy and positron emission tomography, ...
Time perception: paradigms, methods, target duration and individual differences
McFarlane, Henriett A
2008-06-27T23:59:59.000Z
The present study assessed the role of the time judgement paradigms of prospective and retrospective durations, the length of durations and the effects of the states of mood and arousal in time perception. The role of ...
Real-Time Quantitative Imaging of Failure Events in Materials...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Real-Time Quantitative Imaging of Failure Events in Materials Under Load at Temperatures Above 1,600 C Real-Time Quantitative Imaging of Failure Events in Materials Under Load at...
Autonomous global sky monitoring with real-time robotic follow...
Office of Scientific and Technical Information (OSTI)
Conference: Autonomous global sky monitoring with real-time robotic follow-up Citation Details In-Document Search Title: Autonomous global sky monitoring with real-time robotic...
Time-Resolved Study of Bonding in Liquid Carbon
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Time-Resolved Study of Bonding in Liquid Carbon Time-Resolved Study of Bonding in Liquid Carbon Print Wednesday, 28 September 2005 00:00 We are accustomed to observing carbon in...
Measuring the Value of Time in Highway Freight Transportation
Miao, Qing
2014-01-13T23:59:59.000Z
This research investigated several aspects of the value of time (VOT) in the trucking industry. This included examining the marginal monetary benefits and costs of reduced and prolonged freight transportation time on highways. First, a...
Simple time-variant filtering by operator scaling
Park, Choon Byong; Black, Ross A.
1995-09-01T23:59:59.000Z
A convolutional method of time?variant, band?pass filtering presented shows that a change of filter cutoff frequencies with time is achieved by frequency scaling the amplitude spectrum of a reference operator. According to the scaling property...
Optimization of time-based rates in forward energy markets
Wang, J.
This paper presents a new two-step design approach of Time-Based Rate (TBR) programs for markets with a high penetration of variable energy sources such as wind power. First, an optimal market time horizon must be determined ...
The impact of lead time on truckload transportation rates
Caldwell, Erik R. (Erik Russell)
2008-01-01T23:59:59.000Z
The objective of this thesis was to analyze truckload shipment transactions in order to determine if rates are impacted by tender lead time, which is the amount of time between when a carrier is offered a load to when the ...
List Processing in Real Time on a Serial Computer
Baker, Henry G. Jr.
1977-04-01T23:59:59.000Z
A real-time list processing system is one in which the time required by each elementary list operation (CONS, CAR, CDR, RPLACA, RPLACD, EQ, and ATOM in LISP) is bounded by a (small) constant. Classical list processing ...
A time and frequency domain analysis of contrarian trading strategies/
Chaudhuri, Shomesh E
2014-01-01T23:59:59.000Z
This thesis applies time and frequency domain analyses to a high-frequency market making strategy to study the profitability of liquidity provision over multiple time horizons from 1964 to 2013. Using daily returns and ...
Modelling signal interactions with application to financial time series
Jain, Bonny
2014-01-01T23:59:59.000Z
In this thesis, we concern ourselves with the problem of reasoning over a set of objects evolving over time that are coupled through interaction structures that are themselves changing over time. We focus on inferring ...
Ames Lab 101: Real-Time 3D Imaging
Zhang, Song
2012-08-29T23:59:59.000Z
Ames Laboratory scientist Song Zhang explains his real-time 3-D imaging technology. The technique can be used to create high-resolution, real-time, precise, 3-D images for use in healthcare, security, and entertainment applications.