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1

Dynamic Time Expansion and Compression Using Nonlinear Waveguides  

DOE Patents (OSTI)

Dynamic time expansion or compression of a small amplitude input signal generated with an initial scale is performed using a nonlinear waveguide. A nonlinear waveguide having a variable refractive index is connected to a bias voltage source having a bias signal amplitude that is large relative to the input signal to vary the reflective index and concomitant speed of propagation of the nonlinear waveguide and an electrical circuit for applying the small amplitude signal and the large amplitude bias signal simultaneously to the nonlinear waveguide. The large amplitude bias signal with the input signal alters the speed of propagation of the small-amplitude signal with time in the nonlinear waveguide to expand or contract the initial time scale of the small-amplitude input signal.

Findikoglu, Alp T.; Hahn, Sangkoo F.; Jia, Quanxi

2004-06-22T23:59:59.000Z

2

Dynamic time expansion and compression using nonlinear waveguides  

DOE Patents (OSTI)

Dynamic time expansion or compression of a small-amplitude input signal generated with an initial scale is performed using a nonlinear waveguide. A nonlinear waveguide having a variable refractive index is connected to a bias voltage source having a bias signal amplitude that is large relative to the input signal to vary the reflective index and concomitant speed of propagation of the nonlinear waveguide and an electrical circuit for applying the small-amplitude signal and the large amplitude bias signal simultaneously to the nonlinear waveguide. The large amplitude bias signal with the input signal alters the speed of propagation of the small-amplitude signal with time in the nonlinear waveguide to expand or contract the initial time scale of the small-amplitude input signal.

Findikoglu, Alp T. (Los Alamos, NM); Hahn, Sangkoo F. (Los Alamos, NM); Jia, Quanxi (Los Alamos, NM)

2004-06-22T23:59:59.000Z

3

A phenomenological approach to the dynamics of activation and clonal expansion of T cells  

Science Conference Proceedings (OSTI)

This paper deals with the modeling of the dynamics of clonal expansion and immune competition of T cells. The modeling is based on the approach of continuum mechanics, namely by conservation equations closed by phenomenological constitutive equations ... Keywords: Cellular dynamic, Clonal expansion, Immune response, Mixture theory, Proliferative events

M. Dolfin; D. Criaco

2011-01-01T23:59:59.000Z

4

Cardiorenal-endocrine dynamics during and following volume expansion  

SciTech Connect

The relationship between atrial pressure, atrial natriuretic peptide (ANP), the renin-angiotensin-aldosterone system, and renal hemodynamic and excretory function was examined during and following acute 10% body weight saline volume expansion and measurements were made at 3.3, 6.6, and 10% body weight volume expansion in pentobarbital anesthetized dogs. Right atrial pressure (RAP), pulmonary capillary wedge pressure (PCWP), fractional excretion of Na (FE/sub Na/), and ANP all increased in parallel during volume expansion. Plasma renin activity (PRA) and aldosterone decreased in parallel during 10% volume expansion. ANP, PRA and aldosterone were measured by radioimmunoassay. Following 10% volume expansion, saline was infused at the peak urine flow rate to maintain peak volume expansion. Despite continued saline infusion, RAP, PCWP, and ANP decreased in parallel. In contrast, FE/sub Na/ remained increased, and aldosterone and PRA remained depressed. These studies demonstrate that atrial pressures, ANP, and FE/sub Na/ increase in parallel during volume expansion; this suggests a role for ANP in modulating acute atrial volume overload. During stable volume expansion periods, however, despite a decrease in ANP levels, Na excretion remains elevated, suggesting that non-ANP mechanisms may be important in maintaining natriuresis during stable volume expansion.

Zimmerman, R.S.; Edwards, B.S.; Schwab, T.R.; Heublein, D.M.; Burnett, J.C. Jr.

1987-02-01T23:59:59.000Z

5

System dynamics simulation of the expansion of the Panama Canal  

Science Conference Proceedings (OSTI)

The expansion of the Panama Canal could be the largest project attempted by the Republic of Panama in its 100 years of existence. The objective of this simulation study is to use the Canal Expansion project to develop and demonstrate how more precise ...

Humberto R. Alvarez A.; Dario Solis; Arnoldo R. Cano S.; Serge Sala-Diakanda

2006-12-01T23:59:59.000Z

6

Heat Kernel Short-Time Expansion within the Scope of Feynman-Kac Formula  

Science Conference Proceedings (OSTI)

The paper gives an outlook of the stochastic approach to derivation of heat kernel short-time asymptotic expansion and to effective evaluation of corresponding coefficients.

Stepin, S. A.; Rejrat, A. J. [Institute of Mathematics, University of Bialystok, Akademicka 2, 15-267 Bialystok (Poland)

2010-11-25T23:59:59.000Z

7

Incorporating endogenous demand dynamics into long-term capacity expansion power system models for Developing countries  

E-Print Network (OSTI)

This research develops a novel approach to long-term power system capacity expansion planning for developing countries by incorporating endogenous demand dynamics resulting from social processes of technology adoption. ...

Jordan, Rhonda LeNai

2013-01-01T23:59:59.000Z

8

Cosmic parallax as a probe of late time anisotropic expansion  

SciTech Connect

Cosmic parallax is the change of angular separation between a pair of sources at cosmological distances induced by an anisotropic expansion. An accurate astrometric experiment like Gaia could observe or put constraints on cosmic parallax. Examples of anisotropic cosmological models are Lemaitre-Tolman-Bondi void models for off-center observers (introduced to explain the observed acceleration without the need for dark energy) and Bianchi metrics. If dark energy has an anisotropic equation of state, as suggested recently, then a substantial anisotropy could arise at z < or approx. 1 and escape the stringent constraints from the cosmic microwave background. In this paper we show that such models could be constrained by the Gaia satellite or by an upgraded future mission.

Quercellini, Claudia; Cabella, Paolo; Balbi, Amedeo [Universita di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma (Italy); Amendola, Luca [INAF/Osservatorio Astronomico di Roma, V. Frascati 33, 00040 Monteporzio Catone, Roma (Italy); Quartin, Miguel [INAF/Osservatorio Astronomico di Roma, V. Frascati 33, 00040 Monteporzio Catone, Roma (Italy); Institut fuer Theoretische Physik, Universitaet Heidelberg, Philosophenweg 16, 69120 Heidelberg (Germany)

2009-09-15T23:59:59.000Z

9

Early stage expansion and time-resolved spectral emission of laser-induced  

NLE Websites -- All DOE Office Websites (Extended Search)

Early stage expansion and time-resolved spectral emission of laser-induced Early stage expansion and time-resolved spectral emission of laser-induced plasma from polymer Title Early stage expansion and time-resolved spectral emission of laser-induced plasma from polymer Publication Type Journal Article Year of Publication 2009 Authors Boueri, Myriam, Matthieu Baudelet, Jin Yu, Xianglei Mao, Samuel S. Mao, and Richard E. Russo Journal Applied Surface Science Volume 255 Issue 24 Pagination 9566-9571 Date Published 09/2009 Keywords Early stage plasma expansion, Laser ablation of polymer, Plasma spectral emission Abstract In the nanosecond laser ablation regime, absorption of laser energy by the plasma during its early stage expansion critically influences the properties of the plasma and thus its interaction with ambient air. These influences can significantly alter spectral emission of the plasma. For organic samples especially, recombination of the plasma with the ambient air leads to interfering emissions with respect to emissions due to native species evaporated from the sample. Distinguishing interfering emissions due to ambient air represents a critical issue for the application of laser-induced breakdown spectroscopy (LIBS) to the analysis of organic materials. In this paper, we report observations of early stage expansion and interaction with ambient air of the plasma induced on a typical organic sample (nylon) using timeresolved shadowgraph. We compare, in the nanosecond ablation regime, plasmas induced by infrared (IR) laser pulses (1064 nanometers) and ultraviolet (UV) laser pulses (266 nanometers). Nanosecond ablation is compared with femtosecond ablation where the post-ablation interaction is absent. Subsequent to the early stage expansion, we observe for each studied ablation regime, spectral emission from CN, a typical radical for organic and biological samples. Time-resolved LIBS allows identifying emissions from native molecular species and those due to recombination with ambient air through their different time evolution behaviors.

10

Sheath expansion and plasma dynamics in the presence of electrode evaporation: Application to a vacuum circuit breaker  

Science Conference Proceedings (OSTI)

During the postarc dielectric recovery phase in a vacuum circuit breaker, a cathode sheath forms and expels the plasma from the electrode gap. The success or failure of current breaking depends on how efficiently the plasma is expelled from the electrode gap. The sheath expansion in the postarc phase can be compared to sheath expansion in plasma immersion ion implantation except that collisions between charged particles and atoms generated by electrode evaporation may become important in a vacuum circuit breaker. In this paper, we show that electrode evaporation plays a significant role in the dynamics of the sheath expansion in this context not only because charged particle transport is no longer collisionless but also because the neutral flow due to evaporation and temperature gradients may push the plasma toward one of the electrodes. Using a hybrid model of the nonequilibrium postarc plasma and cathode sheath coupled with a direct simulation Monte Carlo method to describe collisions between heavy species, we present a parametric study of the sheath and plasma dynamics and of the time needed for the sheath to expel the plasma from the gap for different values of plasma density and electrode temperatures at the beginning of the postarc phase. This work constitutes a preliminary step toward understanding and quantifying the risk of current breaking failure of a vacuum arc.

Sarrailh, P. [UPS, INPT, LAPLACE (Laboratoire Plasma et Conversion d'Energie), Universite de Toulouse, 118 route de Narbonne, F-31062 Toulouse Cedex 9 (France); LAPLACE, CNRS, F-31062 Toulouse (France); Schneider Electric, Centre de Recherche 38 TEC, 38050 Grenoble Cedex 09 (France); Garrigues, L.; Hagelaar, G. J. M.; Boeuf, J. P. [UPS, INPT, LAPLACE (Laboratoire Plasma et Conversion d'Energie), Universite de Toulouse, 118 route de Narbonne, F-31062 Toulouse Cedex 9 (France); LAPLACE, CNRS, F-31062 Toulouse (France); Sandolache, G.; Rowe, S. [Schneider Electric, Centre de Recherche 38 TEC, 38050 Grenoble Cedex 09 (France)

2009-09-01T23:59:59.000Z

11

Expansion of Facilities on the North Slope of Alaska in Time for the  

NLE Websites -- All DOE Office Websites (Extended Search)

Expansion of Facilities on the North Slope of Alaska in Time for the Expansion of Facilities on the North Slope of Alaska in Time for the International Polar Year Zak, Bernard Sandia National Laboratories Ivey, Mark Sandia National Laboratories Zirzow, Jeffrey Sandia National Laboratories Brower, Walter UIC Science Division ARM/NSA Ivanoff, James NSA Whiteman, Doug NSA/AAO Sassen, Kenneth University of Alaska Fairbanks Truffer-Moudra, Dana University of Alaska Fairbanks Category: Infrastructure & Outreach The International Polar Year (IPY; 2007-2008) will stimulate research in both polar regions, primarily focusing on the rapid climate-related changes occurring at high latitudes. In part in preparation for the IPY, facilities at the NSA ACRF are undergoing expansion. In addition, with funding through NOAA, Phase 1 of the planned $60M Barrow Global Climate Change Research

12

Borel summation of the small time expansion of the heat kernel with a vector potential  

E-Print Network (OSTI)

We study the Borel summability of the small time expansion of the heat kernel associated to a first order perturbation of a Laplacian. An explicit formula for this kernel plays a central role. As a consequence, we get a Poisson formula on the torus.

Thierry Harge

2013-02-04T23:59:59.000Z

13

Dynamical 3-Space: Supernovae and the Hubble Expansion - Older Universe and End of Dark Energy  

E-Print Network (OSTI)

We apply the new dynamics of 3-space to cosmology by deriving a Hubble expansion solution. This dynamics involves two constants; G and alpha - the fine structure constant. This solution gives an excellent parameter-free fit to the recent supernova and gamma-ray burst data without the need for `dark energy' or `dark matter'. The data and theory together imply an older age for the universe of some 14.7Gyrs. Various problems such as fine tuning, the event horizon problem etc are now resolved. A brief review discusses the origin of the 3-space dynamics and how that dynamics explained the bore hole anomaly, spiral galaxy flat rotation speeds, the masses of black holes in spherical galaxies, gravitational light bending and lensing, all without invoking `dark matter' or `dark energy'. These developments imply that a new understanding of the universe is now available.

Reginald T Cahill

2007-05-11T23:59:59.000Z

14

A simple and efficient evolution operator for time-dependent Hamiltonians: the Taylor expansion  

SciTech Connect

No compact expression of the evolution operator is known when the Hamiltonian operator is time dependent, like when Hamiltonian operators describe, in a semiclassical limit, the interaction of a molecule with an electric field. It is well known that Magnus [N. Magnus, Commun. Pure Appl. Math. 7, 649 (1954)] has derived a formal expression where the evolution operator is expressed as an exponential of an operator defined as a series. In spite of its formal simplicity, it turns out to be difficult to use at high orders. For numerical purposes, approximate methods such as 'Runge-Kutta' or 'split operator' are often used usually, however, to a small order (<5), so that only small time steps, about one-tenth or one-hundredth of the field cycle, are acceptable. Moreover, concerning the latter method, split operator, it is only very efficient when a diagonal representation of the kinetic energy operator is known. The Taylor expansion of the evolution operator or the wave function about the initial time provides an alternative approach, which is very simple to implement and, unlike split operator, without restrictions on the Hamiltonian. In addition, relatively large time steps (up to the field cycle) can be used. A two-level model and a propagation of a Gaussian wave packet in a harmonic potential illustrate the efficiency of the Taylor expansion. Finally, the calculation of the time-averaged absorbed energy in fluoroproprene provides a realistic application of our method.

Lauvergnat, David; Blasco, Sophie; Chapuisat, Xavier; Nauts, Andre [Laboratoire de Chimie Physique, Universite Paris-Sud, CNRS, UMR8000, Batiment 490, Orsay F-91405 (France); Laboratoire de Chimie Physique, Universite Paris-Sud, CNRS, UMR8000, Batiment 490, Orsay F-91405 (France); Unite PAMO (Departement de Physique), Universite Catholique de Louvain, 2 Chemin du Cyclotron, 1348 Louvain-la-Neuve (Belgium)

2007-05-28T23:59:59.000Z

15

Towards real-time dynamic spectrum auctions  

Science Conference Proceedings (OSTI)

In this paper, we propose a low-complexity auction framework to distribute spectrum in real-time among a large number of wireless users with dynamic traffic. Our design consists of a compact and highly expressive bidding format, two pricing models to ... Keywords: Algorithms, Auctions, Spectrum

Sorabh Gandhi; Chiranjeeb Buragohain; Lili Cao; Haitao Zheng; Subhash Suri

2008-03-01T23:59:59.000Z

16

Continuous Time Group Discovery in Dynamic Graphs  

Science Conference Proceedings (OSTI)

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.

Miller, K; Eliassi-Rad, T

2010-11-04T23:59:59.000Z

17

Efficient optimal design of uncertain discrete time dynamical systems  

Science Conference Proceedings (OSTI)

In this paper we consider the problem of optimal design of an uncertain discrete time nonlinear dynamical system. The problem is formulated using an a-posterori design criterion, which can account for uncertainties generated by the dynamics of the system ... Keywords: Discrete time dynamical systems, Optimal design, Randomized algorithms, Uncertain parameters

Chenxi Lin; Thordur Runolfsson

2012-10-01T23:59:59.000Z

18

Bayesian dynamic models for space-time point processes  

Science Conference Proceedings (OSTI)

In this work we propose a model for the intensity of a space-time point process, specified by a sequence of spatial surfaces that evolve dynamically in time. This specification allows flexible structures for the components of the model, in order to handle ... Keywords: Bayesian inference, Disease mapping, Dynamic models, Integrated Laplace, Monte Carlo Markov chain, Space-time point processes

Edna A. Reis; Dani Gamerman; Marina S. Paez; Thiago G. Martins

2013-04-01T23:59:59.000Z

19

Dynamic software updates for real-time systems  

Science Conference Proceedings (OSTI)

Seamlessly updating software in running systems has recently gained momentum. Dynamically updating the software of real-time embedded systems, however, still poses numerous challenges: such systems must meet hard deadlines, cope with limited resources, ... Keywords: dynamic software update, embedded, real-time

Michael Wahler; Stefan Richter; Manuel Oriol

2009-10-01T23:59:59.000Z

20

Nuclear dynamics in time-dependent picture  

E-Print Network (OSTI)

Using the time-dependent theory of quantum mechanics, we investigate nuclear electric dipole responses. The time evolution of a wave function is explicitly calculated in the coordinate-space representation. The particle continuum is treated with the absorbing boundary condition. Calculated time-dependent quantities are transformed into those of familiar energy representation. We apply the method to a three-body model for 11Li and to the mean-field model for 22O, then discuss properties of E1 response.

Takashi Nakatsukasa; Makoto Ito; Kazuhiro Yabana

2006-10-19T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Dynamic modelling of metals - Time scales and target loads  

Science Conference Proceedings (OSTI)

Over the past decade steady-state methods have been developed to assess critical loads of metals avoiding long-term risks in view of food quality and eco-toxicological effects on organisms in soils and surface waters. However, dynamic models are needed ... Keywords: Critical loads, Delay times, Dynamic modelling, Metals, Scenario analysis, Target loads

Maximilian Posch; Wim de Vries

2009-01-01T23:59:59.000Z

22

Compile-time dynamic voltage scaling settings: opportunities and limits  

Science Conference Proceedings (OSTI)

With power-related concerns becoming dominant aspects of hardware and software design, significant research effort has been devoted towards system power minimization. Among run-time power-management techniques, dynamic voltage scaling (DVS) has emerged ... Keywords: analytical model, compiler, dynamic voltage scaling, low power, mixed-integer linear programming

Fen Xie; Margaret Martonosi; Sharad Malik

2003-06-01T23:59:59.000Z

23

Energy Levels of "Hydrogen Atom" in Discrete Time Dynamics  

E-Print Network (OSTI)

We analyze dynamical consequences of a conjecture that there exists a fundamental (indivisible) quant of time. In particular we study the problem of discrete energy levels of hydrogen atom. We are able to reconstruct potential which in discrete time formalism leads to energy levels of unperturbed hydrogen atom. We also consider linear energy levels of quantum harmonic oscillator and show how they are produced in the discrete time formalism. More generally, we show that in discrete time formalism finite motion in central potential leads to discrete energy spectrum, the property which is common for quantum mechanical theory. Thus deterministic (but discrete time!) dynamics is compatible with discrete energy levels.

Andrei Khrennikov; Yaroslav Volovich

2006-04-27T23:59:59.000Z

24

Device Specific Real-time Energy Monitoring, Control, and Dynamic...  

NLE Websites -- All DOE Office Websites (Extended Search)

Device Specific Real-time Energy Monitoring, Control, and Dynamic Demand Response Solutions Speaker(s): Jake Masters Olcay Ungun Date: February 23, 2010 - 12:00pm Location: 90-3122...

25

Adaptive fuzzy logic control of discrete-time dynamical systems  

Science Conference Proceedings (OSTI)

The objective of this paper is to achieve tracking control of a class of unknown nonlinear dynamical systems using a discrete-time fuzzy logic controller (FLC). Designing a discrete-time FLC is significant because almost all FLCs are implemented on digital ... Keywords: Adaptive control, Discrete-time control, Fuzzy approximation, Fuzzy logic, Universal fuzzy controller

S. Jagannathan; M. W. Vandegrift; F. L. Lewis

2000-02-01T23:59:59.000Z

26

Chemical dynamics in time and energy space  

Science Conference Proceedings (OSTI)

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.

Myers, J.D.

1993-04-01T23:59:59.000Z

27

An 'optimal' spawning algorithm for adaptive basis set expansion in nonadiabatic dynamics  

Science Conference Proceedings (OSTI)

The full multiple spawning (FMS) method has been developed to simulate quantum dynamics in the multistate electronic problem. In FMS, the nuclear wave function is represented in a basis of coupled, frozen Gaussians, and a 'spawning' procedure prescribes a means of adaptively increasing the size of this basis in order to capture population transfer between electronic states. Herein we detail a new algorithm for specifying the initial conditions of newly spawned basis functions that minimizes the number of spawned basis functions needed for convergence. 'Optimally' spawned basis functions are placed to maximize the coupling between parent and child trajectories at the point of spawning. The method is tested with a two-state, one-mode avoided crossing model and a two-state, two-mode conical intersection model.

Yang, Sandy; Coe, Joshua D.; Kaduk, Benjamin; Martinez, Todd J. [Department of Chemistry and Beckman Institute, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, Illinois 61801 (United States)

2009-04-07T23:59:59.000Z

28

Quantum Geometry of the Dynamical Space-time  

E-Print Network (OSTI)

Quantum theory of field (extended) objects without a priori space-time geometry has been represented. Intrinsic coordinates in the tangent fibre bundle over complex projective Hilbert state space $CP(N-1)$ are used instead of space-time coordinates. The fate of quantum system modeled by the generalized coherent states is rooted in this manifold. Dynamical (state-dependent) space-time arises only at the stage of the quantum "yes/no" measurement. The quantum measurement of the gauge ``field shell'' of the generalized coherent state is described in terms of the affine parallel transport of the local dynamical variables in $CP(N-1)$.

Peter Leifer

2006-11-20T23:59:59.000Z

29

A dynamic time warping approach to real-time activity recognition for food preparation  

Science Conference Proceedings (OSTI)

We present a dynamic time warping based activity recognition system for the analysis of low-level food preparation activities. Accelerometers embedded into kitchen utensils provide continuous sensor data streams while people are using them for cooking. ...

Cuong Pham; Thomas Plötz; Patrick Olivier

2010-11-01T23:59:59.000Z

30

Archimedean-type force in a cosmic dark fluid. I. Exact solutions for the late-time accelerated expansion  

SciTech Connect

We establish a new self-consistent model in order to explain from a unified viewpoint two key features of the cosmological evolution: the inflation in the early Universe and the late-time accelerated expansion. The key element of this new model is the Archimedean-type coupling of the dark matter with dark energy, which form the so-called cosmic dark fluid. We suppose that dark matter particles immersed into the dark energy reservoir are affected by the force proportional to the four-gradient of the dark energy pressure. The Archimedean-type coupling is shown to play a role of effective energy-momentum redistributor between the dark matter and the dark energy components of the dark fluid, thus providing the Universe evolution to be a quasiperiodic and/or multistage process. In the first part of the work we discuss a theoretical base and new exact solutions of the model master equations. Special attention is focused on the exact solutions, for which the scale factor is presented by the anti-Gaussian function: these solutions describe the late-time acceleration and are characterized by a nonsingular behavior in the early Universe. The second part contains qualitative and numerical analysis of the master equations; we focus there on the solutions describing a multi-inflationary Universe.

Balakin, Alexander B.; Bochkarev, Vladimir V. [Kazan Federal University, Kremlevskaya str., 18, 420008, Kazan (Russian Federation)

2011-01-15T23:59:59.000Z

31

A dynamical time operator in Dirac's relativistic quantum mechanics  

E-Print Network (OSTI)

A self-adjoint dynamical time operator is introduced in Dirac's relativistic formulation of quantum mechanics and shown to satisfy a commutation relation with the Hamiltonian analogous to that of the position and momentum operators. The ensuing time-energy uncertainty relation involves the uncertainty in the instant of time when the wave packet passes a particular spatial position and the energy uncertainty associated with the wave packet at the same time, as envisaged originally by Bohr. The instantaneous rate of change of the position expectation value with respect to the simultaneous expectation value of the dynamical time operator is shown to be the phase velocity, in agreement with de Broglie's hypothesis of a particle associated wave whose phase velocity is larger than c. Thus, these two elements of the original basis and interpretation of quantum mechanics are integrated into its formal mathematical structure. Pauli's objection is shown to be resolved or circumvented. Possible relevance to current developments in interference in time, in Zitterbewegung like effects in spintronics, grapheme and superconducting systems and in cosmology is noted.

Mariano Bauer

2009-08-19T23:59:59.000Z

32

Stochastic Simulation of Nonadiabatic Dynamics at Long Time  

E-Print Network (OSTI)

Using a generalized energy-conserving transition probability, it is shown how nonadiabatic calculations, within the Wigner-Heisenberg representation of quantum mechanics, can be reliably extended to far longer times than those allowed by a primitive sampling scheme. Tackling the spin-boson model as a paradigmatic example, substantial numerical evidence is provided that effective integration of the dynamics can be achieved for a wide range of temperatures and friction.

Uken, Daniel A; Petruccione, Francesco

2010-01-01T23:59:59.000Z

33

Stochastic Simulation of Nonadiabatic Dynamics at Long Time  

E-Print Network (OSTI)

Using a generalized energy-conserving transition probability, it is shown how nonadiabatic calculations, within the Wigner-Heisenberg representation of quantum mechanics, can be reliably extended to far longer times than those allowed by a primitive sampling scheme. Tackling the spin-boson model as a paradigmatic example, substantial numerical evidence is provided that effective integration of the dynamics can be achieved for a wide range of temperatures and friction.

Daniel A. Uken; Alessandro Sergi; Francesco Petruccione

2010-03-16T23:59:59.000Z

34

Real time quantum dynamics in the Heisenberg picture  

SciTech Connect

In order to understand dynamics in the Heisenberg picture, a study is made of ordinary single particle quantum mechanics where the methods used can be compared with solving the Schroedinger equation numerically. The methods are generalized to field theory. Both analytic and numerical strategies are developed for solving the Heisenberg equations on a time lattice. The time development of an initial gaussian wave function is considered in various potentials in order to study both quantum tunnelling phenomena and the quantum roll. 9 refs., 1 fig. (LEW)

Cooper, F.

1986-01-01T23:59:59.000Z

35

On Integrating Theories of International Economics in the Strategic Planning of Global Supply Chains and Dynamic Supply Chain Reconfiguration with Capacity Expansion and Contraction  

E-Print Network (OSTI)

This dissertation discusses two independent topics. The first part of the dissertation relates three theories of international economics (comparative advantage, competitive advantage, and competitiveness), and formulates the thesis that incorporating them in the form of readily available individual competitiveness indicators in OR/MS models offers promise to enhance decision-support for the strategic planning of global supply chains in general, and for locating facilities in particular. The objectives of this research were to relate each of these theories and to describe their interrelationships; to describe measures provided by two well-known annual competitiveness reports; and to illustrate application of the theories as a means of supporting the thesis of the research, and justifying the research questions we pose for future research. While this research discusses topics relative to the broader background of global supply chain design, it illustrates applications associated with facility location, a component of the global supply chain design. In the last chapter of the first part of the dissertation, we provide a vision to foster future research that will enhance the profitability of international enterprises under NAFTA. The second part of the dissertation deals with the DSCR model with capacity expansion and contraction. The strategic dynamic supply chain reconfiguration (DSCR) problem is to prescribe the location and capacity of each facility, select links used for transportation, and plan material flows through the supply chain, including production, inventory, backorder, and outsourcing levels. The objective is to minimize total cost. The configuration must be dynamically redesigned over time to accommodate changing trends in demand and/or costs by opening facilities, expanding and/or contracting their capacities, and closing facilities. The problem involves a multi-period, multi-product, multi-echelon supply chain. Research objectives are alternative formulations of DSCR and tests that identify the computational characteristics of each model to determine if one offers superior solvability in comparison with the others. To achieve the first objective, we present an initial MIP model, a refined model that relates decision variables according to a convenient structure, and branch and price (B&P) schemes for the refined model. We found that the network-based formulation offered superior solvability compared to the traditional formulation.

Lee, Chaehwa

2011-12-01T23:59:59.000Z

36

On the beat!: timing and tension for dynamic characters  

Science Conference Proceedings (OSTI)

Dynamic simulation is a promising complement to kinematic motion synthesis, particularly in cases where simulated characters need to respond to unpredictable interactions. Moving beyond simple rag-doll effects, though, requires dynamic control. The main ...

Brian Allen; Derek Chu; Ari Shapiro; Petros Faloutsos

2007-08-01T23:59:59.000Z

37

The Universe Adventure - Expansion  

NLE Websites -- All DOE Office Websites (Extended Search)

Expansion: Chunk-by-Chunk Expansion: Chunk-by-Chunk A sample of the Universe. A very small portion of the Universe. In order to better understand the significance of expansion, let's look at a cubic sample of space. By considering a finite volume we can follow changes in the size of the Universe as we move forwards and backwards in time. Remember, only the size of the cube will change. The galaxies inside the cube stay the same size. This animation illustrates how our cubic piece of the Universe changes with time. If the Universe followed the simplest expansionary models, its size would increase linearly with time. The Universe would continue to expand at a constant rate forever. If you look at only a narrow time-slice of the Universe's history, it does, in fact, appear that this is how the Universe

38

Turbulence Sensor Dynamic Calibration Using Real-Time Spectral Computations  

Science Conference Proceedings (OSTI)

The integration of plug-in Fast Fourier Transform (FFT) boards in data acquisition computers allows a considerable development in the dynamic calibration of turbulence sensors. The spectral transfer function of a fast and sensitive turbulence ...

P. G. Mestayer; S. E. Larsen; C. W. Fairall; J. B. Edson

1990-12-01T23:59:59.000Z

39

Quasi-real-time analysis of dynamic near field scattering data using a graphics processing unit  

E-Print Network (OSTI)

We present an implementation of the analysis of dynamic near field scattering (NFS) data using a graphics processing unit (GPU). We introduce an optimized data management scheme thereby limiting the number of operations required. Overall, we reduce the processing time from hours to minutes, for typical experimental conditions. Previously the limiting step in such experiments, the processing time is now comparable to the data acquisition time. Our approach is applicable to various dynamic NFS methods, including shadowgraph, Schlieren and differential dynamic microscopy.

Giovanni Cerchiari; Fabrizio Croccolo; Frédéric Cardinaux; Frank Scheffold

2012-09-15T23:59:59.000Z

40

Time, Dynamics and Chaos: Integrating Poincare's 'Non-Integrable Systems'  

DOE R&D Accomplishments (OSTI)

This report discusses the nature of time. The author attempts to resolve the conflict between the concept of time reversibility in classical and quantum mechanics with the macroscopic world's irreversibility of time. (LSP)

Prigogine, I.

1990-10-00T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Time Series Forecasting for Dynamic Environments: the DyFor Genetic Program Model  

E-Print Network (OSTI)

Time Series Forecasting for Dynamic Environments: the DyFor Genetic Program Model Neal Wagner programming (GP) to the task of forecasting with favorable results. However, these studies, like those "dynamic" GP model that is specifically tailored for forecasting in non-static environments. This Dynamic

Michalewicz, Zbigniew

42

SOS: saving time in dynamic race detection with stationary analysis  

Science Conference Proceedings (OSTI)

Data races are subtle and difficult to detect errors that arise during concurrent program execution. Traditional testing techniques fail to find these errors, but recent research has shown that targeted dynamic analysis techniques can be developed to ... Keywords: concurrency, monitoring, race, threading

Du Li; Witawas Srisa-an; Matthew B. Dwyer

2011-10-01T23:59:59.000Z

43

Time-domain non-Monte Carlo noise simulation for nonlinear dynamic circuits with arbitrary excitations  

Science Conference Proceedings (OSTI)

A new, time-domain, non-Monte Carlo method for computer simulation of electrical noise in nonlinear dynamic circuits with arbitrary excitations is presented. This time-domain noise simulation ...

Alper Demir; Edward W. Y. Liu; Alberto L. Sangiovanni-Vincentelli

1994-11-01T23:59:59.000Z

44

Real-Time Wind Turbine Emulator Suitable for Power Quality and Dynamic Control Studies  

E-Print Network (OSTI)

1 Real-Time Wind Turbine Emulator Suitable for Power Quality and Dynamic Control Studies Dale S. L. Dolan, Student Member, IEEE, P. W. Lehn, Member IEEE Abstract-- Wind turbines are increasingly becoming-time Wind Turbine Emulator, which emulates the dynamic torque produced by an actual turbine has been

Lehn, Peter W.

45

Beyond Adiabatic Elimination: Systematic Expansions  

E-Print Network (OSTI)

We restate the adiabatic elimination approximation as the first term in a singular perturbation expansion. We use the invariant manifold formalism for singular perturbations in dynamical systems to identify systematic improvements on adiabatic elimination, connecting with well established quantum mechanical perturbation methods. We prove convergence of the expansions when energy scales are well separated. We state and solve the problem of hermiticity of improved effective hamiltonians.

I. L. Egusquiza

2013-09-03T23:59:59.000Z

46

Time consistency and risk averse dynamic decision models ...  

E-Print Network (OSTI)

asset and liability management, scheduling and energy planning. Indeed, ..... the recursive time consistent alternative developed for a CVaR-based portfo-.

47

Dynamic control in real-time heuristic search  

Science Conference Proceedings (OSTI)

Real-time heuristic search is a challenging type of agent-centered search because the agent's planning time per action is bounded by a constant independent of problem size. A common problem that imposes such restrictions is pathfinding in modern computer ...

Vadim Bulitko; Mitja Luštrek; Jonathan Schaeffer; Yngvi Björnsson; Sverrir Sigmundarson

2008-05-01T23:59:59.000Z

48

DHARMA: A Tool for Evaluating Dynamic Scheduling Algorithms for Real-time Multiprocessor Systems  

E-Print Network (OSTI)

A majority of today's real-time systems assume a priori knowledge of task characteristics and hence are based on static designs which contribute to their high cost and inflexibility. The next generation hard real-time systems must be designed to be dynamic and flexible. This provides the motivation to study various dynamic scheduling proposals. In this paper, we discuss the design and implementation of a tool, called DHARMA, which is an attempt towards satisfying such requirements. The tool provides an environment to study various dynamic scheduling algorithms with or without fault-tolerance requirements and associated resource reclaiming algorithms in a multiprocessor real-time system.

G. Manimaran; Anand Manikutty; C. Siva Ram Murthy

1998-01-01T23:59:59.000Z

49

Energy Aware Dynamic Voltage and Frequency Selection for Real-Time Systems with Energy Harvesting  

E-Print Network (OSTI)

Energy Aware Dynamic Voltage and Frequency Selection for Real-Time Systems with Energy Harvesting}@binghamton.edu Abstract In this paper, an energy aware dynamic voltage and frequency selection (EA-DVFS) algorithm energy and the harvested energy in a future duration. Specifically, if the system has sufficient energy

Qiu, Qinru

50

A Tutorial on Time-Evolving Dynamical Bayesian Inference  

E-Print Network (OSTI)

We present a tutorial for Bayesian inference of time-evolving coupled systems in the presence of noise. It includes the necessary theoretical description and the algorithms for its implementation. For general programming purposes, a pseudocode description is given. Examples based on coupled phase and limit-cycle oscillators illustrate the most important features. Codes written in MatLab for the method and the examples accompany the tutorial.

Stankovski, Tomislav; McClintock, Peter V E; Stefanovska, Aneta

2013-01-01T23:59:59.000Z

51

A Tutorial on Time-Evolving Dynamical Bayesian Inference  

E-Print Network (OSTI)

We present a tutorial for Bayesian inference of time-evolving coupled systems in the presence of noise. It includes the necessary theoretical description and the algorithms for its implementation. For general programming purposes, a pseudocode description is given. Examples based on coupled phase and limit-cycle oscillators illustrate the most important features. Codes written in MatLab for the method and the examples accompany the tutorial.

Tomislav Stankovski; Andrea Duggento; Peter V. E. McClintock; Aneta Stefanovska

2013-04-30T23:59:59.000Z

52

A New Statistical–Dynamical Downscaling Procedure Based on EOF Analysis for Regional Time Series Generation  

Science Conference Proceedings (OSTI)

A new statistical–dynamical downscaling procedure is developed and then applied to high-resolution (regional) time series generation and wind resource assessment. The statistical module of the new procedure uses empirical orthogonal function (EOF) ...

Yosvany Martinez; Wei Yu; Hai Lin

2013-04-01T23:59:59.000Z

53

Dynamic Server Allocation Over Time-Varying Channels With Switchover Delay  

E-Print Network (OSTI)

We consider a dynamic server allocation problem over parallel queues with randomly varying connectivity and server switchover delay between the queues. At each time slot, the server decides either to stay with the current ...

Le, Long B.

54

Job Expansion Tax Credit (Connecticut)  

Energy.gov (U.S. Department of Energy (DOE))

The Job Expansion Tax Credit allows eligible businesses to receive tax credits for each new full-time position created. Up to $500 per month per employee is available for up to three years. The...

55

Space Dynamics in Global Time as an Effective Alternative to General Relativity  

E-Print Network (OSTI)

The fundamental physical object of the Global Time Theory is a three-dimensional curved space dynamically developing in global time. The equations of its dynamics are derived from the Lagrangian, and the Hamiltonian of ravitation turns out to be nonzero. The General Relativity solutions are shown to be a subset of the GTT solutions with zero energy density. In Global time Theory, the quantum theory of gravitation can be built on the basis of the Schredinger equation, as for other fields. The quantum model of the Big Bang is presented in some detailes.

D. E. Burlankov

2005-09-14T23:59:59.000Z

56

Dynamic Scheduling of Skippable Periodic Tasks with Energy Efficiency in Weakly Hard Real-Time System  

E-Print Network (OSTI)

Energy consumption is a critical design issue in real-time systems, especially in battery- operated systems. Maintaining high performance, while extending the battery life between charges is an interesting challenge for system designers. Dynamic Voltage Scaling (DVS) allows a processor to dynamically change speed and voltage at run time, thereby saving energy by spreading run cycles into idle time. Knowing when to use full power and when not, requires the cooperation of the operating system scheduler. Usually, higher processor voltage and frequency leads to higher system throughput while energy reduction can be obtained using lower voltage and frequency. Instead of lowering processor voltage and frequency as much as possible, energy efficient real-time scheduling adjusts voltage and frequency according to some optimization criteria, such as low energy consumption or high throughput, while it meets the timing constraints of the real-time tasks. As the quantity and functional complexity of battery powered porta...

Baskaran, Santhi

2010-01-01T23:59:59.000Z

57

A real-time implementation of gradient domain high dynamic range compression using a local Poisson solver  

Science Conference Proceedings (OSTI)

This paper presents a real-time hardware implementation of a gradient domain dynamic range compression algorithm for high dynamic range (HDR) images. This technique works by calculating the gradients of the HDR image, manipulating those gradients, and ... Keywords: Embedded hardware, Gradient domain dynamic range compression, Poisson equation, Real time, Tone mapping operator

Lavanya Vytla; Firas Hassan; Joan E. Carletta

2013-06-01T23:59:59.000Z

58

Resource Reclaiming in Hard Real-Time Systems with Static and Dynamic Workloads  

E-Print Network (OSTI)

This paper addresses resource reclaiming in the context of non-preemptive priority list scheduling for hard real-time systems. Such scheduling is inherently susceptible to multiprocessor timing anomalies. We present low overhead run-time stabilization methods for a general tasking model that allows phantom tasks as a mechanism to model processor external events. A family of scheduling algorithms is de?ned, that guarantees run-time stabilization for systems consisting of tasks with hard and soft deadlines. The later, i.e. soft tasks, may arrive dynamically. Stabilization is addressed in the context of dynamic and static task to processor allocation. Previous stabilization methods, focused on apriori stabilization for static workloads with dynamic task to processor allocation, thus cannot support this general scheduling model. By taking advantage of run-time information, the stabilization algorithms use the scan-window approach to prevent instability from occurring. Mechanisms are introduced that explicitly control the run-time behavior of tasks with hard deadlines. As a consequence, processor resources become available that can be used to improve processor utilization and response time of soft tasks. The resulting scan algorithms are intended for real world applications where low run-time overhead and a realistic task model are needed. 1

A. W. Krings; M. H. Azadmanesh

1997-01-01T23:59:59.000Z

59

Enhancing Security of Real-Time Applications on Grids through Dynamic Scheduling  

E-Print Network (OSTI)

advances in processing power, network bandwidth, and storage capacity, Grids are emerging as next [38], and distributed medical data systems [20]. On-line transaction processing systems are examplesEnhancing Security of Real-Time Applications on Grids through Dynamic Scheduling Tao Xie Xiao Qin

Feitelson, Dror

60

An enhanced dynamic voltage scaling scheme for energy-efficient embedded real-time control systems  

Science Conference Proceedings (OSTI)

Real-Time Dynamic Voltage Scaling (RT-DVS) has been one of the most important techniques for energy savings in battery-powered embedded systems. However, pure RT-DVS approaches rarely take into account the actual performance requirements of the target ...

Feng Xia; Youxian Sun

2006-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

VBR MPEG Video Traffic Dynamic Prediction Based on the Modeling and Forecast of Time Series  

Science Conference Proceedings (OSTI)

The variable-bit-rate traffic characteristic brings a large complication to the utilization of network resources, especially bandwidth. To solve this problem, this paper proposes a dynamic prediction scheme of MPEG video traffic. We first advance an ... Keywords: MPEG, video trace, forecast, time series, ARMA

Jun Dai; Jun Li

2009-08-01T23:59:59.000Z

62

Dynamic programming for constrained optimal control of discrete-time linear hybrid systems  

Science Conference Proceedings (OSTI)

In this paper we study the solution to optimal control problems for constrained discrete-time linear hybrid systems based on quadratic or linear performance criteria. The aim of the paper is twofold. First, we give basic theoretical results on the structure ... Keywords: Dynamic programming, Hybrid systems, Multiparametric programming, Optimal control, Piecewise affine systems

Francesco Borrelli; Mato Baoti?; Alberto Bemporad; Manfred Morari

2005-10-01T23:59:59.000Z

63

Real-time motion effect enhancement based on fluid dynamics in figure animation  

Science Conference Proceedings (OSTI)

In fast figure animation, motion blur is often employed to generate fantastic effects of figure motion, for exaggerating the atmosphere one wants to convey. In the previous works for long time, the solution based on certain kind of image blending in ... Keywords: GPU geometric processing, fluid dynamics, motion blur, skeletal animation

Tian-Chen Xu; En-Hua Wu; Mo Chen; Ming Xie

2011-12-01T23:59:59.000Z

64

TREnD: a Timely, Reliable, Energy-efficient and Dynamic WSN Protocol for Control Applications  

E-Print Network (OSTI)

1 TREnD: a Timely, Reliable, Energy-efficient and Dynamic WSN Protocol for Control Applications for energy consumption. TREnD is implemented on a test-bed and compared to some existing protocols. In this paper, we develop TREnD1 , an energy-efficient The authors are with the ACCESS Linnaeus Center

65

Dynamics in the Deep Canada Basin, Arctic Ocean, Inferred by Thermistor Chain Time Series  

Science Conference Proceedings (OSTI)

A 50-day time series of high-resolution temperature in the deepest layers of the Canada Basin in the Arctic Ocean indicates that the deep Canada Basin is a dynamically active environment, not the quiet, stable basin often assumed. Vertical ...

M-L. Timmermans; H. Melling; L. Rainville

2007-04-01T23:59:59.000Z

66

An express analysis of the term vocabulary of a subject area: the dynamics of change over time  

Science Conference Proceedings (OSTI)

Rapid quantitative monitoring of subject area (catalysis) term-base change dynamics over time by analysis of representative collections of texts with a known time reference was developed and tested. An L-gram representation of texts followed ... Keywords: L-gram text analysis, catalysis, development trends, dynamics of changes over time, filtration, term vocabularies (glossaries)

V. D. Gusev; N. V. Salomatina; A. O. Kuzmin; V. N. Parmon

2012-02-01T23:59:59.000Z

67

Ultrafast time dynamics studies of periodic lattices with free electron laser radiation  

Science Conference Proceedings (OSTI)

It has been proposed that radiation from free electron laser (FEL) at Hamburg (FLASH) can be used for ultrafast time-resolved x-ray diffraction experiments based on the near-infrared (NIR) pump/FEL probe scheme. Here, investigation probing the ultrafast structural dynamics of periodic nano-crystalline organic matter (silver behenate) with such a scheme is reported. Excitation with a femtosecond NIR laser leads to an ultrafast lattice modification which time evolution has been studied through the scattering of vacuum ultraviolet FEL pulses. The found effect last for 6 ps and underpins the possibility for studying nanoperiodic dynamics down to the FEL source time resolution. Furthermore, the possibility of extending the use of silver behenate (AgBh) as a wavelength and temporal calibration tool for experiments with soft x-ray/FEL sources is suggested.

Quevedo, W.; Busse, G.; Hallmann, J.; More, R.; Petri, M.; Rajkovic, I. [Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen (Germany); Krasniqi, F.; Rudenko, A. [Max Planck Advanced Study Group at CFEL, Notkestrasse 85, 22607 Hamburg (Germany); Tschentscher, T. [European XFEL GmbH, Albert-Einstein-Ring 19, 22671 Hamburg (Germany); Stojanovic, N.; Duesterer, S.; Treusch, R.; Tolkiehn, M. [HASYLAB at DESY, Notkestrasse 85, 22607 Hamburg (Germany); Techert, S. [Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Goettingen (Germany); Max Planck Advanced Study Group at CFEL, Notkestrasse 85, 22607 Hamburg (Germany)

2012-11-01T23:59:59.000Z

68

Real-time wind turbine emulator suitable for power quality and dynamic control studies, MASc Thesis  

E-Print Network (OSTI)

Abstract — Wind turbines are increasingly becoming significant components of power systems. To evaluate competing wind energy conversion technologies, a real-time Wind Turbine Emulator, which emulates the dynamic torque produced by an actual turbine has been developed. This is necessary since the real world performance of a wind turbine, subjected to variable wind conditions is more difficult to evaluate than a standard turbine generator system operating in near steady state. This emulator is capable of reproducing both the static and dynamic torque of an actual wind turbine. It models the torque oscillations caused by wind shear, tower shadow, and the obvious pulsations caused by variable wind speed. Also included are the dynamic effects of a large turbine inertia. This emulator will allow testing without the costly construction of the actual turbine blades and tower to determine the strengths and weaknesses of competing energy conversion and control technologies.

Dale S. L. Dolan; Student Member; P. W. Lehn; Member Ieee

2005-01-01T23:59:59.000Z

69

Langevin model for real-time Brownian dynamics of interacting nanodefects in irradiated metals  

SciTech Connect

In situ real-time electron microscope observations of metals irradiated with ultrahigh-energy electrons or energetic ions show that the dynamics of microstructural evolution in these materials is strongly influenced by long-range elastic interactions between mobile nanoscale radiation defects. Treating long-range interactions is also necessary for modeling microstructures formed in ex situ high-dose-rate ion-beam irradiation experiments, and for interpolating the ion-beam irradiation data to the low-dose-rate limit characterizing the neutron irradiation environments of fission or fusion power plants. We show that simulations, performed using an algorithm where nanoscale radiation defects are treated as interacting Langevin particles, are able to match and explain the real-time dynamics of nanodefects observed in in situ electron microscope experiments.

Dudarev, S. L. [EURATOM/CCFE Fusion Association, Culham Centre for Fusion Energy, Abingdon, Oxfordshire OX14 3DB (United Kingdom); Gilbert, M. R. [EURATOM/CCFE Fusion Association, Culham Centre for Fusion Energy, Abingdon, Oxfordshire OX14 3DB (United Kingdom); Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH (United Kingdom); Arakawa, K. [Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, 7-1 Mihogaoka, Ibaraki, Osaka 567-0047 (Japan); Okinawa Institute of Science and Technology, Kunigami, Okinawa 904-0411 (Japan); CREST, JST, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075 (Japan); Mori, H. [Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, 7-1 Mihogaoka, Ibaraki, Osaka 567-0047 (Japan); Yao, Z. [Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH (United Kingdom); Department of Mechanical and Materials Engineering, Queen's University, Nicol Hall, 60 Union Street, Kingston, Ontario, K7L 3N6 (Canada); Jenkins, M. L. [Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH (United Kingdom); Derlet, P. M. [Condensed Matter Theory Group, Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland)

2010-06-01T23:59:59.000Z

70

Real-time dynamic simulator for the Topaz II reactor power system  

SciTech Connect

A dynamic simulator of the TOPAZ II reactor system has been developed for the Nuclear Electric Propulsion Space Test Program. The simulator is a self-contained IBM-PC compatible based system that executes at a speed faster than real-time. The simulator combines first-principle modeling and empirical correlations in its algorithm to attain the modeling accuracy and computational through-put that are required for real-time execution. The overall execution time of the simulator for each time step is 15 ms when no data is written to the disk, and 18 ms when nine double precision data points are written to the disk once in every time step. The simulation program has been tested and it is able to handle a step decrease of $8 worth of reactivity. It also provides simulation of fuel, emitter, collector, stainless steel, and ZrH moderator failures. Presented in this paper are the models used in the calculations, a sample simulation session, and a discussion of the performance and limitations of the simulator. The simulator has been found to provide realistic real-time dynamic response of the TOPAZ II reactor system under both normal and causality conditions.

Kwok, K.S.

1994-10-01T23:59:59.000Z

71

Cosmic Growth History and Expansion History  

E-Print Network (OSTI)

The cosmic expansion history tests the dynamics of the global evolution of the universe and its energy density contents, while the cosmic growth history tests the evolution of the inhomogeneous part of the energy density. Precision comparison of the two histories can distinguish the nature of the physics responsible for the accelerating cosmic expansion: an additional smooth component - dark energy - or a modification of the gravitational field equations. With the aid of a new fitting formula for linear perturbation growth accurate to 0.05-0.2%, we separate out the growth dependence on the expansion history and introduce a new growth index parameter \\gamma that quantifies the gravitational modification.

Eric V. Linder

2005-07-11T23:59:59.000Z

72

The effect of a fifth large-scale space-time dimension on orbital dynamics  

E-Print Network (OSTI)

A model based on simple assumptions about 4-dimensional space-time being closed and isotropic, and embedded in a 5th large-scale dimension, r, representing the radius of curvature of space-time, has been used in an application of Newton's Second Law to describe a system with angular momentum. It has been found that the equations of MOND used to explain the rotation curves of galaxies appear as a limit within this derivation and that there is a universal acceleration constant, ao, with a value, again consistent with that used by MOND. This approach does not require modification of Newtonian dynamics, only its extension into a fifth large-scale dimension. The transition from the classical Newtonian dynamics to the MOND regime emerges naturally and without the introduction of arbitrary fitting functions, if this 5-dimensional model is adopted. The paper also includes the derivation of an effect in 5-dimensional orbital dynamics which is in reasonable agreement with the observed Pioneer Anomaly.

M. B. Gerrard; T. J. Sumner

2006-05-12T23:59:59.000Z

73

HUBBLE CONSTANT, LENSING, AND TIME DELAY IN RELATIVISTIC MODIFIED NEWTONIAN DYNAMICS  

SciTech Connect

The time delay in galaxy gravitational lensing systems has been used to determine the value of the Hubble constant. As with other dynamical phenomena on the galaxy scale, dark matter is often invoked in gravitational lensing to account for the 'missing mass' (the apparent discrepancy between the dynamical mass and the luminous mass). Alternatively, modified gravity can be used to explain the discrepancy. In this paper, we adopt the tensor-vector-scalar gravity (TeVe S), a relativistic version of Modified Newtonian Dynamics, to study gravitational lensing phenomena and derive the formulae needed to evaluate the Hubble constant. We test our method on quasar lensing by elliptical galaxies in the literature. We focus on double-image systems with time delay measurement. Three candidates are suitable for our study: HE 2149-2745, FBQ J0951+2635, and SBS 0909+532. The Hubble constant obtained is consistent with the value used to fit the cosmic microwave background result in a neutrino cosmological model.

Tian, Yong [Department of Physics, National Central University, Jhongli, Taiwan 320 (China); Ko, Chung-Ming [Institute of Astronomy, Department of Physics and Center for Complex Systems, National Central University, Jhongli, Taiwan 320 (China); Chiu, Mu-Chen, E-mail: yonngtian@gmail.com, E-mail: cmko@astro.ncu.edu.tw, E-mail: mcc@roe.ac.uk [Scottish University Physics Alliance, Institute for Astronomy, the Royal Observatory, University of Edinburgh, Blackford Hill, Edinburgh, EH9 3HJ (United Kingdom)

2013-06-20T23:59:59.000Z

74

Microsoft PowerPoint - Real-Time Dynamic Brake Assessment poster.ppt [Compatibility Mode]  

NLE Websites -- All DOE Office Websites (Extended Search)

Dynamic Brake Assessment Dynamic Brake Assessment Purpose Conduct a proof-of-concept test to examine the feasibility of developing an on-board system to assess a vehicle's ability to stop based on typical low-pressure in-service braking events. Partnerships H.T. Hackney Company MGM Brakes Overview Funded through the Federal Motor Carrier Safety Administration's Vehicle and Roadside Operations Division Concept stemming from on the Department of Energy's Medium Truck Duty Cycle research as well as previous research conducted for the National Highway Transportation Safety Administration. Signals to be collected Real-time brake application pressure Vehicle speed and acceleration GPS location and grade information Vehicle weight (current load) Engine parameters such as RPM and torque To be conducted October 2010 -

75

Intrinsic dynamics of heart regulatory systems on short time-scales: from experiment to modelling  

E-Print Network (OSTI)

We discuss open problems related to the stochastic modeling of cardiac function. The work is based on an experimental investigation of the dynamics of heart rate variability (HRV) in the absence of respiratory perturbations. We consider first the cardiac control system on short time scales via an analysis of HRV within the framework of a random walk approach. Our experiments show that HRV on timescales of less than a minute takes the form of free diffusion, close to Brownian motion, which can be described as a non-stationary process with stationary increments. Secondly, we consider the inverse problem of modeling the state of the control system so as to reproduce the experimentally observed HRV statistics of. We discuss some simple toy models and identify open problems for the modelling of heart dynamics.

Khovanov, I A; McClintock, P V E; Stefanovska, A

2009-01-01T23:59:59.000Z

76

Time-resolved infrared studies of the dynamics of ligand binding to cytochrome c oxidase  

DOE Green Energy (OSTI)

Time-resolved infrared spectroscopy (TRIRS) has been employed to study the reactions of small molecules with the cytochrome a{sub 3}-Cu{sub B} site of cytochrome c oxidase (CcO). All phases of these reactions have been investigated, from ultrafast phenomena (hundreds of femtoseconds) to relatively slow processes (milliseconds). The ligation dynamics immediately following photodissociation have been studied using a TRIR technique with time resolution of less than 1 ps. The rate of photoinitiated transfer of CO from Fe{sub a3}{sup 2+} to Cu{sub B}{sup +} was measured directly by monitoring the development of the transient Cu{sub B}{sup +}-CO absorption. The development of a stationary Cu{sub B}{sup +}-CO spectrum which is constant until the CO dissociates from Cu{sub B}{sup +} occurs in less than 1 ps, indicating that the photoinitiated transfer of CO is remarkably fast. This unprecedented ligand transfer rate has profound implications with regard to the structure and dynamics of the cytochrome a{sub 3}-Cu{sub B} site, the functional architecture of the protein and coordination dynamics in general. The photodissociation and recombination of Cn{sup {minus}} has also been studied using a real-time TRIR technique. The CN{sup {minus}} recombination rate of 430 s{sup {minus}1} is consistent with a recombination pathway similar to the one they have previously proposed for CO. The authors suggest the rate determining step for CN{sup {minus}} recombination is the thermal dissociation of the Fe{sub a3}{sup 2+}-L bond. 25 refs., 7 figs.

Dyer, R.B.; Peterson, K.A.; Stoutland, P.O.; Woodruff, W.H.

1991-01-01T23:59:59.000Z

77

Dynamic environment coupling induce synchronized states in coupled time-delayed electronic circuits  

E-Print Network (OSTI)

We experimentally demonstrate the occurrence of various synchronized states in coupled piece-wise linear time-delayed electronic circuits using dynamic environment coupling where the environment has its own intrinsic dynamics via feedback from the circuits. We carry out these experiments in two different coupling configurations, namely mutual and subsystem coupling configurations. Depending upon the coupling strength and the nature of feedback, we observe a transition from nonsynchronization to complete synchronization via phase synchronization and from nonsynchronization to inverse synchronization via inverse-phase synchronization between the circuits in hyperchaotic regime. Snapshots of the time evolution, phase projection plots and localized sets of the circuits as observed experimentally from the oscilloscope, along with supporting numerical simulations confirm the existence of different synchronized states. Further, the transition to different synchronized states can be verified from the changes in the largest Lyapunov exponents, Correlation of Probability of Recurrence and Correlation Coefficient as a function of the coupling strength. We present a detailed linear stability analysis and obtain conditions for different synchronized states.

R. Suresh; K. Srinivasan; D. V. Senthilkumar; K. Murali; M. Lakshmanan; J. Kurths

2013-04-04T23:59:59.000Z

78

Quasi-explicit time-integration schemes for dynamic fracture with set-valued cohesive zone models  

Science Conference Proceedings (OSTI)

We investigate quasi-explicit time-integration schemes for solving dynamic fracture problems with set-valued cohesive zone models. These schemes combine a central difference time-integration scheme and a partially implicit and lumped treatment of the ... Keywords: Cohesive zone model, Finite elements, Time-integration scheme

D. Doyen; A. Ern; S. Piperno

2013-08-01T23:59:59.000Z

79

Dynamic I/O Power Management for Hard Real-time Systems  

E-Print Network (OSTI)

Power consumption is an important design parameter for embedded and portable systems. Software-controlled (or dynamic) power management (DPM) has recently emerged as an attractive alternative to inflexible hardware solutions. DPM for hard real-time systems has received relatively little attention. In particular, energy-driven I/O device scheduling for real-time systems has not been considered before. We present the first online DPM algorithm, which we call Low Energy Device Scheduler (LEDES), for hard realtime systems. LEDES takes as inputs a predetermined task schedule and a device-usage list for each task and it generates a sequence of sleep/working states for each device. It guarantees that real-time constraints are not violated and it also minimizes the energy consumed by the I/O devices used by the task set. LEDES is energy-optimal under the constraint that the start times of the tasks are fixed. We present a case study to show that LEDES can reduce energy consumption by almost 50%. 1

Vishnu Swaminathan; Krishnendu Chakrabarty; S. S. Iyengar

2001-01-01T23:59:59.000Z

80

Time-dependent restricted-active-space self-consistent field theory for laser-driven many-electron dynamics  

E-Print Network (OSTI)

We present the time-dependent restricted-active-space self-consistent field (TD-RASSCF) theory as a new framework for the time-dependent many-electron problem. The theory generalizes the multiconfigurational time-dependent Hartree-Fock (MCTDHF) theory by incorporating the restricted-active-space scheme well known in time-independent quantum chemistry. Optimization of the orbitals as well as the expansion coefficients at each time step makes it possible to construct the wave function accurately while using only a relatively small number of electronic configurations. In numerical calculations of high-order harmonic generation spectra of a one-dimensional model of atomic beryllium interacting with a strong laser pulse, the TD-RASSCF method is reasonably accurate while largely reducing the computational complexity. The TD-RASSCF method has the potential to treat large atoms and molecules beyond the capability of the MCTDHF method.

Miyagi, Haruhide

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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81

Time-resolved infrared absorption studies of the dynamics of radical reactions.  

Science Conference Proceedings (OSTI)

There is very little information available about the dynamics of radical+radical interactions. These processes are important in combustion being chain termination steps as well as generating new molecular species. To study these processes, a new experimental apparatus has been constructed to investigate radical-radical dynamics. The first radical or atomic species is produced with a known concentration in a microwave discharge flow system. The second is produced by pulsed laser photolysis of a suitable photolyte. The time dependence of individual rovibrational states of the product is followed by absorption of a continuous infrared laser. This approach will allow the reaction of interest to be differentiated from other radical reactions occurring simultaneously. The experimental approach is highly versatile, being able to detect a number of molecular species of particular interest to combustion processes such as water, methane, acetylene etc. at the state specific level. State specific infrared absorption coefficients of radicals can be measured in situ allowing for the determination of the absolute concentrations and hence branching ratios for reactions having multiple reaction pathways.

Macdonald, R. G. (Chemistry)

2008-01-01T23:59:59.000Z

82

Resolving dynamics of cell signaling via real-time imaging of the immunological synapse.  

SciTech Connect

This highly interdisciplinary team has developed dual-color, total internal reflection microscopy (TIRF-M) methods that enable us to optically detect and track in real time protein migration and clustering at membrane interfaces. By coupling TIRF-M with advanced analysis techniques (image correlation spectroscopy, single particle tracking) we have captured subtle changes in membrane organization that characterize immune responses. We have used this approach to elucidate the initial stages of cell activation in the IgE signaling network of mast cells and the Toll-like receptor (TLR-4) response in macrophages stimulated by bacteria. To help interpret these measurements, we have undertaken a computational modeling effort to connect the protein motion and lipid interactions. This work provides a deeper understanding of the initial stages of cellular response to external agents, including dynamics of interaction of key components in the signaling network at the 'immunological synapse,' the contact region of the cell and its adversary.

Stevens, Mark A.; Pfeiffer, Janet R. (University of New Mexico, Albuquerque, NM); Wilson, Bridget S. (University of New Mexico, Albuquerque, NM); Timlin, Jerilyn Ann; Thomas, James L. (University of New Mexico, Albuquerque, NM); Lidke, Keith A. (University of New Mexico, Albuquerque, NM); Spendier, Kathrin (University of New Mexico, Albuquerque, NM); Oliver, Janet M. (University of New Mexico, Albuquerque, NM); Carroll-Portillo, Amanda (University of New Mexico, Albuquerque, NM); Aaron, Jesse S.; Mirijanian, Dina T.; Carson, Bryan D.; Burns, Alan Richard; Rebeil, Roberto

2009-10-01T23:59:59.000Z

83

A General Systems Theory for Chaos, Quantum Mechanics and Gravity for Dynamical Systems of all Space-Time Scales  

E-Print Network (OSTI)

Non-local connections, i. e. long-range space-time correlations intrinsic to the observed subatomic dynamics of quantum systems is also exhibited by macro-scale dynamical systems as selfsimilar fractal space-time fluctuations and is identified as self-organized criticality. The author has developed a general systems theory for the observed self-organized criticality applicable to dynamical systems of all space-time scales based on the concept that spatial integration of enclosed small-scale fluctuations results in the formation of large eddy circulation. The eddy energy spectrum therefore represents the statistical normal distribution according to the Central Limit Theorem. The additive amplitudes of eddies, when squared (variance or eddy kinetic energy), represent the statistical normal (probability) distribution, a result observed in the subatomic dynamics of quantum systems. The model predicts Kepler's laws of planetary motion for eddy circulation dynamics. Inverse square law of gravitation therefore applies to the eddy continuum ranging from subatomic to macro-scale dynamical systems, e.g. weather systems. The model is similar to a superstring model for subatomic dynamics which unifies quantum mechanical and classical concepts and manifestation of matter is visualised as vibrational modes in string-like energy flow patterns. The cumulative sum of centripetal forces in a hierarchy of vortex circulations may result in the observed inverse square law form for gravitational attraction between inertial masses of the eddies.

A M Selvam

2005-03-03T23:59:59.000Z

84

Real-time Non-contact Millimeter Wave Characterization of Water-Freezing and Ice-Melting Dynamics  

E-Print Network (OSTI)

We applied millimeter wave radiometry for the first time to monitor water-freezing and ice-melting dynamics in real-time non-contact. The measurements were completed at a frequency of 137 GHz. Small amounts (about 2 mL) ...

Woskov, Paul P.

85

Dynamical Bayesian Inference of Time-evolving Interactions: From a Pair of Coupled Oscillators to Networks of Oscillators  

E-Print Network (OSTI)

Living systems have time-evolving interactions that, until recently, could not be identified accurately from recorded time series in the presence of noise. Stankovski et al. (Phys. Rev. Lett. 109 024101, 2012) introduced a method based on dynamical Bayesian inference that facilitates the simultaneous detection of time-varying synchronization, directionality of influence, and coupling functions. It can distinguish unsynchronized dynamics from noise-induced phase slips. The method is based on phase dynamics, with Bayesian inference of the time- evolving parameters being achieved by shaping the prior densities to incorporate knowledge of previous samples. We now present the method in detail using numerically-generated data, data from an analog electronic circuit, and cardio-respiratory data. We also generalize the method to encompass networks of interacting oscillators and thus demonstrate its applicability to small-scale networks.

Duggento, Andrea; McClintock, Peter V E; Stefanovska, Aneta

2012-01-01T23:59:59.000Z

86

A combined Event-Driven/Time-Driven molecular dynamics algorithm for the simulation of shock waves in rarefied gases  

Science Conference Proceedings (OSTI)

A novel combined Event-Driven/Time-Driven (ED/TD) algorithm to speed-up the Molecular Dynamics simulation of rarefied gases using realistic spherically symmetric soft potentials is presented. Due to the low density regime, the proposed method correctly ... Keywords: 47.11.Mn, 47.40.Ki, 47.45.-n, 47.61.Cb, Event-Driven MD, Molecular Dynamics, Non-continuum effects, Shock Waves

Paolo Valentini; Thomas E. Schwartzentruber

2009-12-01T23:59:59.000Z

87

Reissner-Nordstrom Expansion  

E-Print Network (OSTI)

We propose a classical mechanism for the cosmic expansion during the radiation-dominated era. This mechanism assumes that the Universe is a two-component gas. The first component is a gas of ultra-relativistic "normal" particles described by an equation of state of an ideal quantum gas of massless particles. The second component consist of "unusual" charged particles (namely, either with ultra-high charge or with ultra-high mass) that provide the important mechanism of expansion due to their interaction with the "normal" component of the gas. This interaction is described by the Reissner--Nordstr\\"om metric purely geometrically -- the ``unusual'' particles are modeled as zero-dimensional naked singularities inside spheres of gravitational repulsion. The radius of a repulsive sphere is inversely proportional to the energy of an incoming particle or the temperature. The expansion mechanism is based on the inflating of the "unusual" particles (of charge $Q$) with the drop of the temperature -- this drives apart all neutral particles and particles of specific charge $q/m$ such that ${sign}(Q) q/m \\ge - 1$. The Reissner--Nordstr\\"om expansion naturally ends at recombination. We discuss the range of model parameters within which the proposed expansion mechanism is consistent with the restrictions regarding quantum effects.

Emil M. Prodanov; Rossen I. Ivanov; V. G. Gueorguiev

2007-03-01T23:59:59.000Z

88

A time-cognizant dynamic crash recovery scheme suitable for distributed real-time main memory databases  

Science Conference Proceedings (OSTI)

Rapid and efficient recovery in the event of site crash is very important for distributed real-time main memory database system. In this paper, the recovery correctness criteria of distributed real-time main memory databases are first given. Then, a ...

Yingyuan Xiao; Yunsheng Liu; Xiangyang Chen; Xiaofeng Liu

2006-09-01T23:59:59.000Z

89

Aging in reversible dynamics of disordered systems. II. Emergence of the arcsine law in the random hopping time dynamics of the REM  

E-Print Network (OSTI)

Applying the new tools developed in [G1], we investigate the arcsine aging regime of the random hopping time dynamics of the REM. Our results are optimal in several ways. They cover the full time-scale and temperature domain where this phenomenon occurs. On this domain the limiting clock process and associated time correlation function are explicitly constructed. Finally, all convergence statements w.r.t. the law of the random environment are obtained in the strongest sense possible, except perhaps on the very last scales before equilibrium.

Véronique Gayrard

2010-08-23T23:59:59.000Z

90

Growth dynamics of pentacene thin films: Real-time synchrotron x-ray scattering study  

Science Conference Proceedings (OSTI)

Real-time synchrotron x-ray scattering in the anti-Bragg configuration was used to monitor the dynamics of pentacene film growth on inert substrates. A distributed-growth model, according to which pentacene molecules adsorbed on the nth layer can either nucleate and contribute to the growth of the (n+1)th layer or transfer downward and contribute to the growth of the nth layer, gave a good description of the data. For molecules adsorbed on the first and second layers, the probability of downward transfer was found to be dependent on the substrate, and independent of temperature within the range from 25 to 60 deg. C. For films grown on SiO{sub 2}, an Ehrlich-Schwoebel barrier of the order of 70 meV dominated downward transfer of pentacene molecules in layers away from the substrate. For films grown on an alkylated self-assembled monolayer, significant desorption of pentacene molecules from the substrate at elevated temperatures forced the growth mode toward the three-dimensional limit.

Mayer, Alex C.; Ruiz, Ricardo; Malliaras, George G. [Materials Science and Engineering, Cornell University, Ithaca, New York 14853 (United States); Zhou, Hua; Headrick, Randall L. [Department of Physics, University of Vermont, Burlington, Vermont 05405 (United States); Kazimirov, Alexander [Cornell High Energy Synchrotron Source, Ithaca, New York 14853 (United States)

2006-05-15T23:59:59.000Z

91

Bed expansion crucible tests  

SciTech Connect

The Am/Cm program will vitrify the americium and curium currently stored in F-canyon. A batch flowsheet has been developed (with non-radioactive surrogate feed in place of the F-canyon solution) and tested full-scale in the 5-inch Cylindrical Induction Melter (CIM) facility at TNX. During a normal process run, a small bed expansion occurs when oxygen released from reduction of cerium (IV) oxide to cerium (III) oxide is trapped in highly viscous glass. The bed expansion is characterized by a foamy layer of glass that slowly expands as the oxygen is trapped and then dissipates when the viscosity of the foam becomes low enough to allow the oxygen to escape. Severe bed expansions were noted in the 5-inch CIM when re-heating after an interlock during the calcination phase of the heat cycle, escaping the confines of the melter vessel. In order to better understand the cause of the larger than normal bed expansion and to develop mitigating techniques, a series of three crucible tests were conducted.

Stone, M.E.

2000-04-04T23:59:59.000Z

92

Discrete-Time Poles and Dynamics of Discontinuous Mode Boost and Buck Converters Under Various Control Schemes  

E-Print Network (OSTI)

Nonlinear systems, such as switching DC-DC boost or buck converters, have rich dynamics. A simple one-dimensional discrete-time model is used to analyze the boost or buck converter in discontinuous conduction mode. Seven different control schemes (open-loop power stage, voltage mode control, current mode control, constant power load, constant current load, constant-on-time control, and boundary conduction mode) are analyzed systematically. The linearized dynamics is obtained simply by taking partial derivatives with respect to dynamic variables. In the discrete-time model, there is only a single pole and no zero. The single closed-loop pole is a linear combination of three terms: the open-loop pole, a term due to the control scheme, and a term due to the non-resistive load. Even with a single pole, the phase response of the discrete-time model can go beyond -90 degrees as in the two-pole average models. In the boost converter with a resistive load under current mode control, adding the compensating ramp has no effect on the pole location. Increasing the ramp slope decreases the DC gain of control-to-output transfer function and increases the audio-susceptibility. Similar analysis is applied to the buck converter with a non-resistive load or variable switching frequency. The derived dynamics agrees closely with the exact switching model and the past research results.

Chung-Chieh Fang

2012-11-19T23:59:59.000Z

93

Separation of Stochastic and Deterministic Information from Seismological Time Series with Nonlinear Dynamics and Maximum Entropy Methods  

SciTech Connect

We present a procedure developed to detect stochastic and deterministic information contained in empirical time series, useful to characterize and make models of different aspects of complex phenomena represented by such data. This procedure is applied to a seismological time series to obtain new information to study and understand geological phenomena. We use concepts and methods from nonlinear dynamics and maximum entropy. The mentioned method allows an optimal analysis of the available information.

Gutierrez, Rafael M.; Useche, Gina M.; Buitrago, Elias [Centro de Investigaciones, Universidad Antonio Narino, Carrera 3 Este No. 47A--15 Bogota (Colombia)

2007-11-13T23:59:59.000Z

94

Car-Parrinello Molecular Dynamics With A Sinusoidal Time-Dependent Potential Field  

E-Print Network (OSTI)

A sinusoidal external field is applied in Car-Parrinello molecular dynamics simulations. We present an implementation and discuss first test applications to electron and ion transfers in complex molecular systems.

Alznauer, Tobias

2012-01-01T23:59:59.000Z

95

Spectroscopy, photo-physics, and time resolved exciton dynamics of GaSe quantum dots  

E-Print Network (OSTI)

of Carrier Relaxation Dynamics in Type II CdSe/CdTe TetrapodHigh Quality Zinc Blende CdSe Nanocrystals”, J. Phys. Chem.Shape Tuning of Type II CdTe-CdSe Colloidal Nanocrystal

Mirafzal, Hoda

2011-01-01T23:59:59.000Z

96

Stability of Anisotropic Cylinder with Zero Expansion  

E-Print Network (OSTI)

We study the dynamical instability of anisotropic collapsing cylinder with the expansion-free condition, which generates vacuum cavity within fluid distribution. The perturbation scheme is applied to distinguish Newtonian, post-Newtonian and post-post Newtonian terms, which are used for constructing dynamical equation at Newtonian and post-Newtonian regimes. We analyze the role of pressure anisotropy and energy density inhomogeneity on the stability of collapsing cylinder. It turns out that stability of the cylinder depends upon these physical properties of the fluid, not on the stiffness of the fluid.

M. Sharif; M. Azam

2013-05-24T23:59:59.000Z

97

Stability of Anisotropic Cylinder with Zero Expansion  

E-Print Network (OSTI)

We study the dynamical instability of anisotropic collapsing cylinder with the expansion-free condition, which generates vacuum cavity within fluid distribution. The perturbation scheme is applied to distinguish Newtonian, post-Newtonian and post-post Newtonian terms, which are used for constructing dynamical equation at Newtonian and post-Newtonian regimes. We analyze the role of pressure anisotropy and energy density inhomogeneity on the stability of collapsing cylinder. It turns out that stability of the cylinder depends upon these physical properties of the fluid, not on the stiffness of the fluid.

Sharif, M

2013-01-01T23:59:59.000Z

98

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

E-Print Network (OSTI)

We describe a two-color pump-probe scanning magneto-optical Kerr effect (MOKE) microscope which we have developed to investigate electron spin phenomena in semiconductors at cryogenic temperatures with picosecond time and micrometer spatial resolution. The key innovation of our microscope is the usage of an ultrafast `white light' supercontinuum fiber-laser source which provides access to the whole visible and near-infrared spectral range. Our Kerr microscope allows for the independent selection of the excitation and detection energy while avoiding the necessity to synchronize the pulse trains of two separate picosecond laser systems. The ability to independently tune the pump and probe wavelength enables the investigation of the influence of excitation energy on the optically induced electron spin dynamics in semiconductors. We demonstrate picosecond real-space imaging of the diffusive expansion of optically excited electron spin packets in a (110) GaAs quantum well sample to illustrate the capabilities of t...

Henn, T; Ossau, W; Molenkamp, L W; Biermann, K; Santos, P V

2013-01-01T23:59:59.000Z

99

Long-time electron spin storage via dynamical suppression of hyperfine-induced decoherence in a quantum dot  

SciTech Connect

The coherence time of an electron spin decohered by the nuclear spin environment in a quantum dot can be substantially increased by subjecting the electron to suitable dynamical decoupling sequences. We analyze the performance of high-level decoupling protocols by using a combination of analytical and exact numerical methods, and by paying special attention to the regimes of large interpulse delays and long-time dynamics, which are outside the reach of standard average Hamiltonian theory descriptions. We demonstrate that dynamical decoupling can remain efficient far beyond its formal domain of applicability, and find that a protocol exploiting concatenated design provides best performance for this system in the relevant parameter range. In situations where the initial electron state is known, protocols able to completely freeze decoherence at long times are constructed and characterized. The impact of system and control nonidealities is also assessed, including the effect of intrabath dipolar interaction, magnetic field bias and bath polarization, as well as systematic pulse imperfections. While small bias field and small bath polarization degrade the decoupling fidelity, enhanced performance and temporal modulation result from strong applied fields and high polarizations. Overall, we find that if the relative errors of the control pulse flip angles do not exceed 3%, decoupling protocols can still prolong the coherence time by up to 2 orders of magnitude.

Zhang, W.; Konstantinidis, N.; Dobrovitski, V.; Harmon, B.; Santos, L.; Viola, L.

2008-03-27T23:59:59.000Z

100

Real Time Dynamics of Laser Activated Interface Processes at the Molecular Scale  

SciTech Connect

Nanotechnology is one of the most interesting and challenging frontiers of science and technology. We are motivated by the belief that progress will come from improved understanding and control of structure, dynamics and reactivity at interfaces. First, we provide a summary of our projects and key findings. The following pages provide a more detailed account.

Eric Borguet

2007-12-30T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Energy aware dynamic voltage and frequency selection for real-time systems with energy harvesting  

Science Conference Proceedings (OSTI)

In this paper, an energy aware dynamic voltage and frequency selection (EA-DVFS) algorithm is proposed. The EA-DVFS algorithm adjusts the processor's behavior depending on the summation of the stored energy and the harvested energy in a future duration. ...

Shaobo Liu; Qinru Qiu; Qing Wu

2008-03-01T23:59:59.000Z

102

Time-stepping numerical simulation of switched circuits within the nonsmooth dynamical systems approach  

Science Conference Proceedings (OSTI)

The numerical integration of switching circuits is known to be a tough issue when the number of switches is large, or when sliding modes exist. Then, classical analog simulators may behave poorly, or even fail. In this paper, it is shown on two examples ... Keywords: analog simulation, backward Euler algorithm, complementarity dynamical systems, complementarity problems, multivalued systems, power converters, switching circuits, unilateral state constraints

Vincent Acary; Olivier Bonnefon; Bernard Brogliato

2010-07-01T23:59:59.000Z

103

Loop expansion in Yang-Mills thermodynamics  

E-Print Network (OSTI)

We argue that a selfconsistent spatial coarse-graining, which involves interacting (anti)calorons of unit topological charge modulus, implies that real-time loop expansions of thermodynamical quantities in the deconfining phase of SU(2) and SU(3) Yang-Mills thermodynamics are, modulo 1PI resummations, determined by a finite number of connected bubble diagrams.

Ralf Hofmann

2006-09-05T23:59:59.000Z

104

Turbulent pattern formation and diffusion in the early-time dynamics in the relativistic heavy-ion collision  

E-Print Network (OSTI)

We propose a picture of turbulent pattern formation in the relativistic heavy-ion collision, which follows an efficient process to break color strings and dispose energy in the whole phase space. We perform numerical simulations using the SU(2) pure Yang-Mills theory in a non-expanding box to observe a dynamical phenomenon in the transverse plane akin to the domain growth in time-dependent spin systems.

Kenji Fukushima

2013-07-03T23:59:59.000Z

105

Accelerated expansion by non-minimally coupled scalar fields  

E-Print Network (OSTI)

In a class of spatially homogeneous cosmologies including those of Bianchi type I--VIII mathematical results are presented which show that a scalar field non-minimally coupled to the scalar curvature of spacetime can dynamically yield a positive cosmological constant without the potential being required to include one. More precisely, it is shown that in an exponential potential any positive coupling constant leads eventually to late-time de Sitter expansion and isotropization corresponding to a positive cosmological constant and that this behaviour is independent of the steepness of the potential. This is in marked contrast to the minimally coupled case where power-law inflation occurs at most, provided the potential is sufficiently shallow.

Roger Bieli

2006-12-14T23:59:59.000Z

106

Explicit/multi-parametric model predictive control (MPC) of linear discrete-time systems by dynamic and multi-parametric programming  

Science Conference Proceedings (OSTI)

This work presents a new algorithm for solving the explicit/multi-parametric model predictive control (or mp-MPC) problem for linear, time-invariant discrete-time systems, based on dynamic programming and multi-parametric programming techniques. The ... Keywords: Dynamic programming, Explicit Model Predictive Control, Model Predictive Control, Multi-parametric control, Multi-parametric programming

K. I. Kouramas; N. P. Faísca; C. Panos; E. N. Pistikopoulos

2011-08-01T23:59:59.000Z

107

Resolving Emissions Dynamics via Mass Spectrometry: Time Resolved Measurements of Emission Transients by Mass Spectrometry  

DOE Green Energy (OSTI)

Transient emissions occur throughout normal engine operation and can significantly contribute to overall system emissions. Such transient emissions may originate from various sources including cold start, varying load and exhaust-gas recirculation (EGR) rates; all of which are dynamic processes in the majority of engine operation applications (1). Alternatively, there are systems which are inherently dynamic even at steady-state engine-operation conditions. Such systems include catalytic exhaust-emissions treatment devices with self-initiated and sustained oscillations (2) and NOX adsorber systems (3,4,5). High-speed diagnostics, capable of temporally resolving such emissions transients, are required to characterize the process, verify calculated system inputs, and optimize the system.

Partridge, William P.

2000-08-20T23:59:59.000Z

108

Dynamic  

Office of Legacy Management (LM)

Dynamic Dynamic , and Static , Res.ponse of the Government Oil Shale Mine at ' , . , Rifle, Colorado, to the Rulison Event. , . ; . . DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document. p ( y c - - a 2-1 0 -4- REPORT AT (29-2) 914 USBM 1 0 0 1 UNITED STATES DEPARTMENT O F THE I NTERIOR BUREAU OF MINES e s.09 P. L. R U S S E L L RESEARCH D l RECTOR Februory 2, lB7O DYNAMIC AND STATIC RESPONSE 'OF THE GOVERNMENT OIL SHALE MINE A T RIFLE, COLORADO, T O THE, RULISON EVENT ORDER FROM CFSTl A S ~ B ~ &J C / This page intentionally left blank CONTENTS Page . . . . . . . . . . . . . . . . . . . . . . . . . H i s t o r i c . a l Des c r i p t i o n 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Summary 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction 3

109

Dynamic reliability using entry-time approach for maintenance of nuclear power plants  

E-Print Network (OSTI)

Entry-time processes are finite-state continuous-time jump processes with transition rates depending only on the two states involved in transition, the calendar time, and the most recent arrival time, which is termed as entry-time. The entry-time processes have the potential to provide a significantly greater range of applicability and flexibility than traditional reliability tools for case studies related to equipment and components in nuclear power plants. In this dissertation, the finite difference approximation of the integrodifferential Chapman-Kolmogorov equations for the entry-time processes was developed, and then it was verified by application to some hypothetical examples that are solved by alternative means, either (semi-)analytically or via simulation. To demonstrate the ability of entry-time model to applications in nuclear power plants for a RIAM based scenario, the entry-time approach is applied to the maintenance of main generators in nuclear power using the data from INPO-EPIX database. In this application, both reliability and financial performances acquired using the entry-time approaches corresponding to different maintenance policies are presented and discussed to help make maintenance decisions for the plant management. The ability of the EPIX database to provide time-dependent failure rates is demonstrated and the techniques for extraction of failure rates from the database for main generators are also discussed.

Wang, Shuwen

2008-05-01T23:59:59.000Z

110

A Gas Dynamics Method Based on The Spectral Deferred Corrections (SDC) Time Integration Technique and The Piecewise Parabolic Method (PPM)  

SciTech Connect

We present a computational gas dynamics method based on the Spectral Deferred Corrections (SDC) time integration technique and the Piecewise Parabolic Method (PPM) finite volume method. The PPM framework is used to define edge averaged quantities which are then used to evaluate numerical flux functions. The SDC technique is used to integrate solution in time. This kind of approach was first taken by Anita et al in [17]. However, [17] is problematic when it is implemented to certain shock problems. Here we propose significant improvements to [17]. The method is fourth order (both in space and time) for smooth flows, and provides highly resolved discontinuous solutions. We tested the method by solving variety of problems. Results indicate that the fourth order of accuracy in both space and time has been achieved when the flow is smooth. Results also demonstrate the shock capturing ability of the method.

Samet Y. Kadioglu

2011-12-01T23:59:59.000Z

111

Hydrodynamic gradient expansion in gauge theory plasmas  

E-Print Network (OSTI)

We utilize the fluid-gravity duality to investigate the large order behavior of hydrodynamic gradient expansion of the dynamics of a gauge theory plasma system. This corresponds to the inclusion of dissipative terms and transport coefficients of very high order. Using the dual gravity description, we calculate numerically the form of the stress tensor for a boost-invariant flow in a hydrodynamic expansion up to terms with 240 derivatives. We observe a factorial growth of gradient contributions at large orders, which indicates a zero radius of convergence of the hydrodynamic series. Furthermore, we identify the leading singularity in the Borel transform of the hydrodynamic energy density with the lowest nonhydrodynamic excitation corresponding to a `nonhydrodynamic' quasinormal mode on the gravity side.

Michal P. Heller; Romuald A. Janik; Przemyslaw Witaszczyk

2013-02-04T23:59:59.000Z

112

The Accuracy and Efficiency of Semi-Implicit Time Stepping for Mesoscale Storm Dynamics  

Science Conference Proceedings (OSTI)

The semi-implicit time-stepping scheme is often applied to the terms responsible for fast waves in large-scale global weather prediction and general circulation models to remove the time step restrictions associated with these waves. Both the ...

S. J. Thomas; G. L. Browning

2001-10-01T23:59:59.000Z

113

A timed mobile agent planning approach for distributed information retrieval in dynamic network environments  

Science Conference Proceedings (OSTI)

The number of mobile agents and total execution time are two factors used to represent the system overhead that must be considered as part of mobile agent planning (MAP) for distributed information retrieval. In addition to these two factors, the time ... Keywords: Distributed computing, Distributed information retrieval, Internet and mobile computing, Mobile agents, P2P computing

Jin-Wook Baek; Heon Y. Yeom

2006-11-01T23:59:59.000Z

114

Superstatistical fluctuations in time series: applications to share price dynamics and turbulence  

E-Print Network (OSTI)

We introduce a general technique to study whether a given experimental time series is superstatistical. Crucial for the applicability of the superstatistics concept is the existence of a parameter $\\beta$ that fluctuates on a large time scale as compared to the other time scales of the complex system under consideration. The proposed method extracts the main superstatistical parameters out of a given data set and checks the validity of the superstatistical model assumptions. We test the method thoroughly with surrogate data sets. Then the applicability of the superstatistical approach is illustrated using real experimental data. We study two examples, velocity time series measured in turbulent Taylor-Couette flows and time series of log-returns of the closing prices of some stock market indices.

Van der Straeten, Erik

2009-01-01T23:59:59.000Z

115

Hydro Aluminium Sunndal Expansion Project  

Science Conference Proceedings (OSTI)

Apr 1, 2003 ... Hydro Aluminium Sunndal Expansion Project ... very competitive, and it is the prerequisite for the present project, both in terms of cost efficiency ...

116

Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydration Hydration Water on Rutile Studied by Backscattering Neutron Spectroscopy and Molecular Dynamics Simulation E. Mamontov,* ,† D. J. Wesolowski, ‡ L. Vlcek, § P. T. Cummings, §,| J. Rosenqvist, ‡ W. Wang, ⊥ and D. R. Cole ‡ Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6473, Chemical Sciences DiVision, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6110, Department of Chemical Engineering, Vanderbilt UniVersity, NashVille, Tennessee 37235-1604, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6496, and EnVironmental Sciences DiVision, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6036 ReceiVed: December 20, 2007; ReVised Manuscript ReceiVed: June 4, 2008 The high energy resolution, coupled with the wide dynamic range, of the new backscattering

117

The Dynamics of Household Travel Time Expenditures and Car Ownership Decisions  

E-Print Network (OSTI)

or more of the others (say, car usage as a function of carnumberof workers, explains car usage, but not car ownership;locations imply higher car usage in terms of travel times

Golob, Thomas F.

1990-01-01T23:59:59.000Z

118

Computational image analysis of subcellular dynamics in time-lapse fluorescence microscopy  

E-Print Network (OSTI)

The use of image segmentation and motion tracking algorithms was adapted for analyzing time-lapse data of cells with fluorescently labeled protein. Performance metrics were devised and algorithm parameters were matched to ...

Huang, Austin V., 1980-

2005-01-01T23:59:59.000Z

119

Dynamic power allocation and routing for satellite and wireless networks with time varying channels  

E-Print Network (OSTI)

Satellite and wireless networks operate over time varying channels that depend on attenuation conditions, power allocation decisions, and inter-channel interference. In order to reliably integrate these systems into a high ...

Neely, Michael J. (Michael James), 1975-

2004-01-01T23:59:59.000Z

120

Power-aware scheduling and dynamic voltage setting for tasks running on a hard real-time system  

E-Print Network (OSTI)

Abstract- This paper addresses the problem of minimizing energy consumption of a computer system performing periodic hard real-time tasks with precedence constraints. In the proposed approach, dynamic power management and voltage scaling techniques are combined to reduce the energy consumption of the CPU and devices. The optimization problem is first formulated as an integer programming problem. Next, a three-phase solution framework, which integrates power management scheduling and task voltage assignment, is proposed. Experimental results show that the proposed approach outperforms existing methods by an average of 18 % in terms of the system-wide energy savings. I.

Peng Rong

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Real-Time Dynamic Visual Tracking Using PSD Sensors and Extended Trapezoidal Motion Planning  

Science Conference Proceedings (OSTI)

A real-time visual servo tracking system for an industrial robot has been implemented using PSD (Position Sensitive Detector) cameras, neural networks, and an extended trapezoidal motion planning method. PSD and directly transduces the light‘s ... Keywords: extended trapezoidal motion planning, locally activated neural network, position sensitive detectors, target tracking, visual servoing

Soo-Hyuk Nam; Se-Young Oh

1999-01-01T23:59:59.000Z

122

Reliability-aware dynamic energy management in dependable embedded real-time systems  

E-Print Network (OSTI)

Recent studies show that, voltage scaling, which is an efficient energy management technique, has a direct and negative effect on system reliability because of the increased rate of transient faults (e.g., those induced by cosmic particles). In this work, we propose energy management schemes that explicitly take system reliability into consideration. The proposed reliability-aware energy management schemes dynamically schedule recoveries for tasks to be scaled down to recuperate the reliability loss due to energy management. Based on the amount of available slack, the application size and the fault rate changes, we analyze when it is profitable to reclaim the slack for energy savings without sacrificing system reliability. Checkpoint technique is further explored to efficiently use the slack. Analytical and simulation results show that, the proposed schemes can achieve comparable energy savings as ordinary energy management schemes while preserving system reliability. The ordinary energy management schemes that ignore the effects of voltage scaling on fault rate changes could lead to drastically decreased system reliability.

Dakai Zhu

2006-01-01T23:59:59.000Z

123

The Star, A Dynamically Configured Dataflow Director for Real Time Control  

SciTech Connect

The CEBAF accelerator is controlled by an automated system consisting of 50 computers connected to machine hardware and another 20 to 30 computers used for displaying machine data. The control system communication software must manage the inter-machine communication of those computers. Each of the different segments of software that make up the machine control system is treated as data sources and data sinks, with a single process mediating the transfer of all data between any data source/data sink pair. The mediating process is called the Star. This dynamically configured process keeps track of all available machine data posted by data sources and of all data requested by data sinks. Data transmission rates through the Star are kept low by sending only data that is requested by other control software, and then only when the value of the data changes. The system is entirely response-driven, with the Star process taking action only at the request of either a data source or a sink. The software for the communication is written using standard C code and TCP/IP sockets, making the communication platform independent.

Matt Bickley; J. Kewisch

1993-05-01T23:59:59.000Z

124

Chaotic itinerancy and power-law residence time distribution in stochastic dynamical system  

E-Print Network (OSTI)

To study a chaotic itinerant motion among varieties of ordered states, we propose a stochastic model based on the mechanism of chaotic itinerancy. The model consists of a random walk on a half-line, and a Markov chain with a transition probability matrix. To investigate the stability of attractor ruins in the model, we analyze the residence time distribution of orbits at attractor ruins. We show that the residence time distribution averaged by all attractor ruins is given by the superposition of (truncated) power-law distributions, if a basin of attraction for each attractor ruin has zero measure. To make sure of this result, we carry out a computer simulation for models showing chaotic itinerancy. We also discuss the fact that chaotic itinerancy does not occur in coupled Milnor attractor systems if the transition probability among attractor ruins can be represented as a Markov chain.

Jun Namikawa

2004-10-15T23:59:59.000Z

125

Polynomial-time quantum algorithm for the simulation of chemical dynamics  

E-Print Network (OSTI)

The computational cost of exact methods for quantum simulation using classical computers grows exponentially with system size. As a consequence, these techniques can only be applied to small systems. By contrast, we demonstrate that quantum computers could exactly simulate chemical reactions in polynomial time. Our algorithm uses the split-operator approach and explicitly simulates all electron-nuclear and inter-electronic interactions in quadratic time. Surprisingly, this treatment is not only more accurate than the Born-Oppenheimer approximation, but faster and more efficient as well, for all reactions with more than about four atoms. This is the case even though the entire electronic wavefunction is propagated on a grid with appropriately short timesteps. Although the preparation and measurement of arbitrary states on a quantum computer is inefficient, here we demonstrate how to prepare states of chemical interest efficiently. We also show how to efficiently obtain chemically relevant observables, such as state-to-state transition probabilities and thermal reaction rates. Quantum computers using these techniques could outperform current classical computers with one hundred qubits.

Ivan Kassal; Stephen P. Jordan; Peter J. Love; Masoud Mohseni; Alán Aspuru-Guzik

2008-01-18T23:59:59.000Z

126

EA-1934: Expansion of Active Borrow Areas, Hanford Site, Richland,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

EA-1934: Expansion of Active Borrow Areas, Hanford Site, Richland, EA-1934: Expansion of Active Borrow Areas, Hanford Site, Richland, Washington EA-1934: Expansion of Active Borrow Areas, Hanford Site, Richland, Washington SUMMARY This EA evaluates the potential environmental impacts of expansion or continued use of existing sand and gravel pits located on the Hanford Site (Pits F, H, N, 6, 9, 18, 21, 23, 24, 30, and 34) and establishing one new borrow area source in the 100 Area for ongoing construction activities and fill material following remediation activities. The scope of this EA does not include borrow sources for silt-loam material. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD August 15, 2013 EA-1934: Mitigation Action Plan Expansion of Active Borrow Areas, Hanford Site, Richland, Washington

127

EA-1934: Expansion of Active Borrow Areas, Hanford Site, Richland,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

4: Expansion of Active Borrow Areas, Hanford Site, Richland, 4: Expansion of Active Borrow Areas, Hanford Site, Richland, Washington EA-1934: Expansion of Active Borrow Areas, Hanford Site, Richland, Washington SUMMARY This EA evaluates the potential environmental impacts of expansion or continued use of existing sand and gravel pits located on the Hanford Site (Pits F, H, N, 6, 9, 18, 21, 23, 24, 30, and 34) and establishing one new borrow area source in the 100 Area for ongoing construction activities and fill material following remediation activities. The scope of this EA does not include borrow sources for silt-loam material. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD August 15, 2013 EA-1934: Mitigation Action Plan Expansion of Active Borrow Areas, Hanford Site, Richland, Washington

128

Test Cases for Wind Power Plant Dynamic Models on Real-Time Digital Simulator: Preprint  

DOE Green Energy (OSTI)

The objective of this paper is to present test cases for wind turbine generator and wind power plant models commonly used during commissioning of wind power plants to ensure grid integration compatibility. In this paper, different types of wind power plant models based on the Western Electricity Coordinating Council Wind Generator Modeling Group's standardization efforts are implemented on a real-time digital simulator, and different test cases are used to gauge their grid integration capability. The low-voltage ride through and reactive power support capability and limitations of wind turbine generators under different grid conditions are explored. Several types of transient events (e.g., symmetrical and unsymmetrical faults, frequency dips) are included in the test cases. The differences in responses from different types of wind turbine are discussed in detail.

Singh, M.; Muljadi, E.; Gevorgian, V.

2012-06-01T23:59:59.000Z

129

Crossroads Expansion | Open Energy Information  

Open Energy Info (EERE)

Expansion Expansion Jump to: navigation, search Name Crossroads Expansion Facility Crossroads Expansion Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Oklahoma Gas & Electric Developer RES Americas Energy Purchaser Oklahoma Gas & Electric Coordinates 36.021°, -98.667° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":36.021,"lon":-98.667,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

130

The flip-over effect in self-similar laser-induced plasma expansion  

Science Conference Proceedings (OSTI)

We present a rigorous study of a dynamical model for a nonsymmetric expansion of laser-induced plasma plumes into the vacuum. The model is used in the laser film deposition technique and for remote chemical analysis in the so-called laser-induced breakdown spectroscopy. It defines a particular class of solutions of the hydrodynamics equations when the (plasma) mass density, pressure, and temperature as functions of position have level surfaces that are ellipsoids. The time evolution of ellipsoid semiaxes is determined by the dynamical model. In this model we investigate the flip-over effect: A pancakelike shape of the plasma plume turns into a cigarlike shape and vice versa in due course of its expansion. The effect has been observed in experiments as well as in numerical simulations. In many practical cases, axially symmetric plasma plumes with the adiabatic constant of (5/3) (ideal gas) are used. For this case we prove that the flip-over effect occurs exactly once in the above dynamical model. This rigorous result agrees with the earlier experimental and numerical evidence and, hence, validates a wide applicability of the model.

Baxter, Nathan P.; Shabanov, Sergei V. [Department of Mathematics, University of Florida, Gainesville, Florida 32611 (United States)

2008-09-15T23:59:59.000Z

131

First Demonstration of Combined kV/MV Image-Guided Real-Time Dynamic Multileaf-Collimator Target Tracking  

SciTech Connect

Purpose: For intrafraction motion management, a real-time tracking system was developed by combining fiducial marker-based tracking via simultaneous kilovoltage (kV) and megavoltage (MV) imaging and a dynamic multileaf collimator (DMLC) beam-tracking system. Methods and Materials: The integrated tracking system employed a Varian Trilogy system equipped with kV/MV imaging systems and a Millennium 120-leaf MLC. A gold marker in elliptical motion (2-cm superior-inferior, 1-cm left-right, 10 cycles/min) was simultaneously imaged by the kV and MV imagers at 6.7 Hz and segmented in real time. With these two-dimensional projections, the tracking software triangulated the three-dimensional marker position and repositioned the MLC leaves to follow the motion. Phantom studies were performed to evaluate time delay from image acquisition to MLC adjustment, tracking error, and dosimetric impact of target motion with and without tracking. Results: The time delay of the integrated tracking system was {approx}450 ms. The tracking error using a prediction algorithm was 0.9 {+-} 0.5 mm for the elliptical motion. The dose distribution with tracking showed better target coverage and less dose to surrounding region over no tracking. The failure rate of the gamma test (3%/3-mm criteria) was 22.5% without tracking but was reduced to 0.2% with tracking. Conclusion: For the first time, a complete tracking system combining kV/MV image-guided target tracking and DMLC beam tracking was demonstrated. The average geometric error was less than 1 mm, and the dosimetric error was negligible. This system is a promising method for intrafraction motion management.

Cho, Byungchul [Department of Radiation Oncology, Stanford University, Stanford, CA (United States)], E-mail: bccho@stanford.edu; Poulsen, Per R. [Department of Radiation Oncology, Stanford University, Stanford, CA (United States); Department of Medical Physics, Department of Oncology, Aarhus University, Aarhus (Denmark); Sloutsky, Alex [Varian Medical Systems, Palo Alto, CA (United States); Sawant, Amit; Keall, Paul J. [Department of Radiation Oncology, Stanford University, Stanford, CA (United States)

2009-07-01T23:59:59.000Z

132

Cosmic Growth History and Expansion History  

E-Print Network (OSTI)

LBNL- 58260 Cosmic Growth History andExpansion History Eric V. Linder Physics Division, LawrenceCalifornia. Cosmic Growth History and Expansion History Eric

Linder, Eric V.

2009-01-01T23:59:59.000Z

133

Development of Low Thermal Expansion Superalloys  

Science Conference Proceedings (OSTI)

For heat resistant alloys it is useful to decrease the thermal expansion for improved adherance of low thermal expansion ceramic coatings like silicon nitride,.

134

Real-time embedded systems powered by FPGA dynamic partial self-reconfiguration: a case study oriented to biometric recognition applications  

Science Conference Proceedings (OSTI)

This work aims to pave the way for an efficient open system architecture applied to embedded electronic applications to manage the processing of computationally complex algorithms at real-time and low-cost. The target is to define a standard architecture ... Keywords: Automatic fingerprint authentication system, Dynamic partial self-reconfiguration, FPGA, Reconfiguration controller, Run-time reconfigurable computing

Francisco Fons, Mariano Fons, Enrique Cantó, Mariano López

2013-09-01T23:59:59.000Z

135

The Magnus expansion and some of its applications  

E-Print Network (OSTI)

Approximate resolution of linear systems of differential equations with varying coefficients is a recurrent problem shared by a number of scientific and engineering areas, ranging from Quantum Mechanics to Control Theory. When formulated in operator or matrix form, the Magnus expansion furnishes an elegant setting to built up approximate exponential representations of the solution of the system. It provides a power series expansion for the corresponding exponent and is sometimes referred to as Time-Dependent Exponential Perturbation Theory. Every Magnus approximant corresponds in Perturbation Theory to a partial re-summation of infinite terms with the important additional property of preserving at any order certain symmetries of the exact solution. The goal of this review is threefold. First, to collect a number of developments scattered through half a century of scientific literature on Magnus expansion. They concern the methods for the generation of terms in the expansion, estimates of the radius of convergence of the series, generalizations and related non-perturbative expansions. Second, to provide a bridge with its implementation as generator of especial purpose numerical integration methods, a field of intense activity during the last decade. Third, to illustrate with examples the kind of results one can expect from Magnus expansion in comparison with those from both perturbative schemes and standard numerical integrators. We buttress this issue with a revision of the wide range of physical applications found by Magnus expansion in the literature.

S. Blanes; F. Casas; J. A. Oteo; J. Ros

2008-10-30T23:59:59.000Z

136

Chaos and dynamical trends in barred galaxies: bridging the gap between N-body simulations and time-dependent analytical models  

E-Print Network (OSTI)

Self-consistent N-body simulations are an efficient tool to study galactic dynamics. However, it can be challenging to use them for the detailed study of individual trajectories (or ensembles of trajectories). Such orbital studies are important to shed light on global phase space properties, which are the underlying cause of observed structures. The potentials needed to describe self-consistent models are in this case time-dependent. For this reason, we aim to investigate the different dynamical properties (such as regular and chaotic motion) of a non-autonomous galactic system, whose time-dependent potential adequately mimics certain realistic trends arising from N-body barred galaxy simulations. We construct a fully time-dependent analytical model, which manages to capture and reproduce several features of an N-body simulation. We model the gravitational potentials of three components (disc, bar and dark matter halo), whose time-dependent parameters are derived from an N-body simulation. We start by studying the dynamical stability of its reduced time-independent 2-degrees of freedom model by charting the different islands of stability associated with certain orbital morphologies and detecting the chaotic and regular regions. We then turn our interest to the full 3-degrees of freedom time-dependent case, where we show a few representative trajectories which experience different typical dynamical behaviours, i.e., an interplay between regular and chaotic motion for different epochs. Finally, we focus on the study of the underlying global dynamical transitions of the time-dependent system in terms of estimating the relative total fraction of (un)stable motion of an ensemble of initial conditions taken from the simulation and evolved with the time-dependent potential. We find that, for such an ensemble, the fraction of regular motion increases with time.

T. Manos; Rubens E. G. Machado

2013-11-14T23:59:59.000Z

137

Major Business Expansion Bond Program (Maine) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Expansion Bond Program (Maine) Expansion Bond Program (Maine) Major Business Expansion Bond Program (Maine) < Back Eligibility Commercial Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State Maine Program Type Bond Program Provider Finance Authority of Maine The Major Business Expansion Bond Program provides long-term, credit-enhanced financing up to $25,000,000 at taxable bond rates for businesses creating or retaining at least 50 jobs; up to $10,000,000 is available for businesses which expand their manufacturing services. The bond proceeds may be used to acquire real estate, machinery, equipment, or rehabilitate or expand an existing facility. The interest rate is determined by market forces at the time of the bond sale

138

Time-resolved THz studies of carrier dynamics in semiconductors, superconductors, and strongly-correlated electron materials  

Science Conference Proceedings (OSTI)

Perhaps the most important aspect of contemporary condensed matter physics involves understanding strong Coulomb interactions between the large number of electrons in a solid. Electronic correlations lead to the emergence of new system properties, such as metal-insulator transitions, superconductivity, magneto-resistance, Bose-Einstein condensation, the formation of excitonic gases, or the integer and fractional Quantum Hall effects. The discovery of high-Tc superconductivity in particular was a watershed event, leading to dramatic experimental and theoretical advances in the field of correlated-electron systems. Such materials often exhibit competition between the charge, lattice, spin, and orbital degrees of freedom, whose cause-effect relationships are difficult to ascertain. Experimental insight into the properties of solids is traditionally obtained by time-averaged probes, which measure e.g., linear optical spectra, electrical conduction properties, or the occupied band structure in thermal equilibrium. Many novel physical properties arise from excitations out of the ground state into energetically higher states by thermal, optical, or electrical means. This leads to fundamental interactions between the system's constituents, such as electron-phonon and electron-electron interactions, which occur on ultrafast timescales. While these interactions underlie the physical properties of solids, they are often only indirectly inferred from time-averaged measurements. Time-resolved spectroscopy, consequently, is playing an ever increasing role to provide insight into light-matter interaction, microscopic processes, or cause-effect relationships that determine the physics of complex materials. In the past, experiments using visible and near-infrared femtosecond pulses have been extensively employed, e.g. to follow relaxation and dephasing processes in metals and semiconductors. However, many basic excitations in strongly-correlated electron systems and nanoscale materials occur at lower energies. The terahertz (THz) regime is particularly rich in such fundamental resonances. This includes ubiquitous lattice vibrations and low-energy collective oscillations of conduction charges. In nanoscale materials, band structure quantization also yields novel infrared and THz transitions, including intersubband absorption in quantum wells. The formation of excitons in turn leads to low-energy excitations analogous to inter-level transitions in atoms. In transition-metal oxides, fundamental excitation gaps arise from charge pairing into superconducting condensates and other correlated states. This motivates the use of ultrafast THz spectroscopy as a powerful tool to study light-matter interactions and microscopic processes in nanoscale and correlated-electron materials.A distinct advantage of coherent THz pulses is that the amplitude and phase of the electric field can be measured directly, as the THz fields are coherent with the fs pulses from which they are generated. Using THz time-domain spectroscopy (THz-TDS), both the real and imaginary parts of the response functions (such as the dielectric function) are obtained directly without the need for Kramers?Kronig transforms. The THz response can also be expressed in terms of absorption and refractive index, or as the optical conductivity. The optical conductivity describes the current response of a many-body system to an electric field, an ideal tool to study conducting systems. A second important advantage is the ultrafast time resolution that results from the short temporal duration of the THz time-domain sources. In particular, optical-pump THz-probe spectroscopy enables a delicate probe of the transient THz conductivity after optical photoexcitation. These experiments can provide insight into quasiparticle interactions, phase transitions, or nonequilibrium dynamics. In this chapter we will provide many such examples. Since THz spectroscopy of solids is a quickly expanding field

Kaindl, Robert A.; Averitt, Richard D.

2006-11-14T23:59:59.000Z

139

Flame-capturing technique. 1: Adaptation to gas expansion  

E-Print Network (OSTI)

Various flame tracking techniques are often used in hydrodynamic simulations. Their use is indispensable when resolving actual scale of the flame is impossible. We show that parameters defining "artificial flame" propagation found from model systems may yield flame velocities several times distinct from the required ones, due to matter expansion being ignored in the models. Integral effect of material expansion due to burning is incorporated into flame capturing technique (FCT) [Khokhlov(1995)]. Interpolation formula is proposed for the parameters governing flame propagation yielding 0.2% accurate speed and width for any expansion (and at least 0.01% accurate for expansions typical in type Ia supernova explosions.) Several models with simple burning rates are studied with gas expansion included. Plausible performance of the technique in simulations is discussed. Its modification ensuring finite flame width is found. Implementation suggestions are summarized, main criterion being the scheme performance being insensitive to expansion parameter (thus absence of systematic errors when the burning progresses from inner to outer layers); in this direction promising realizations are found, leading to flame structure not changing while flame evolves through the whole range of densities in the white dwarf.

Andrey V. Zhiglo

2005-11-12T23:59:59.000Z

140

Heat kernel expansion: user's manual  

E-Print Network (OSTI)

The heat kernel expansion is a very convenient tool for studying one-loop divergences, anomalies and various asymptotics of the effective action. The aim of this report is to collect useful information on the heat kernel coefficients scattered in mathematical and physical literature. We present explicit expressions for these coefficients on manifolds with and without boundaries, subject to local and non-local boundary conditions, in the presence of various types of singularities (e.g., domain walls). In each case the heat kernel coefficients are given in terms of several geometric invariants. These invariants are derived for scalar and spinor theories with various interactions, Yang-Mills fields, gravity, and open bosonic strings. We discuss the relations between the heat kernel coefficients and quantum anomalies, corresponding anomalous actions, and covariant perturbation expansions of the effective action (both "low-" and "high-energy" ones).

D. V. Vassilevich

2003-06-15T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

An Operational Dynamical Downscaling Prediction System for Nordeste Brazil and the 2002–04 Real-Time Forecast Evaluation  

Science Conference Proceedings (OSTI)

The International Research Institute for Climate Prediction (IRI) and Ceará Foundation for Meteorology and Water Resources (FUNCEME) in Brazil have developed a dynamical downscaling prediction system for Northeast Brazil (the Nordeste) and have ...

Liqiang Sun; Huilan Li; Stephen E. Zebiak; David F. Moncunill; Francisco D. A. D. S. Filho; Antonio D. Moura

2006-05-01T23:59:59.000Z

142

Dynamical Ocean Forcing of the Madden–Julian Oscillation at Lead Times of up to Five Months  

Science Conference Proceedings (OSTI)

The authors show that a simple three-dimensional ocean model linearized about a resting basic state can accurately simulate the dynamical ocean response to wind forcing by the Madden–Julian oscillation (MJO). This includes the propagation of ...

Benjamin G. M. Webber; David P. Stevens; Adrian J. Matthews; Karen J. Heywood

2012-04-01T23:59:59.000Z

143

Query expansion techniques for question answering  

E-Print Network (OSTI)

Query expansion is a technique used to boost performance of a document retrieval engine, such as those commonly found in question answering (QA) systems. Common methods of query expansion for Boolean keyword-based document ...

Bilotti, Matthew W. (Matthew William), 1981-

2004-01-01T23:59:59.000Z

144

Capacity expansion in contemporary telecommunication networks  

E-Print Network (OSTI)

We study three capacity expansion problems in contemporary long distance telecommunication networks. The first two problems, motivated by a major long distance provider, address capacity expansion in national hybrid long ...

Sivaraman, Raghavendran

2007-01-01T23:59:59.000Z

145

Specialty sorghums in direct-expansion extrusion  

E-Print Network (OSTI)

Whole-grain, high-fiber, or decorticated extrudates of excellent properties were made from white (nonwaxy, heterowaxy, waxy) sorghums or brown tannin-sorghums. Intact grains or prepared raw materials (cracked, cracked and sifted, decorticated) were extruded in a high-temperature, short-time (HTST) extruder. Waxy extrudates expanded less and were softer than those from nonwaxy or heterowaxy sorghums. Waxy extrudates had bigger air cells and thicker cell walls. Low moisture used in this type of extrusion and its interaction with the different amylose contents were the causes of the differences. Whole-grain extrudates from white sorghum had similar sensory acceptability to those from white decorticated sorghum. They had bland flavor and appearance and texture characteristic of whole-grain products. Extrudates from tannin sorghums were reddish brown due to their high levels of phytochemicals. The more expanded, softer products from whole-grain tannin sorghum were obtained when the grain was cracked and sifted. Decreased expansion was caused by higher levels of fiber and greater particle sizes (as in the extruded intact grain), and by reduced particle sizes (as in the cracked non-sifted grain). Expansion was correlated to smaller air cells with smooth walls. A simple enzymatic method was developed that isolates the 'gritty' particles from whole-grain/high-fiber extrudates, which closely correlated with expansion. Gritty particles were fiber (bran) plus undegraded starchy material. Whole grain/high fiber extrudates from white and tannin sorghums are an excellent option for food processors because of their excellent taste, appearance and texture.

Perez Gonzalez, Alejandro Jose

2005-12-01T23:59:59.000Z

146

The dosimetric impact of inversely optimized arc radiotherapy plan modulation for real-time dynamic MLC tracking delivery  

SciTech Connect

Purpose: Real-time dynamic multileaf collimator (MLC) tracking for management of intrafraction tumor motion can be challenging for highly modulated beams, as the leaves need to travel far to adjust for target motion perpendicular to the leaf travel direction. The plan modulation can be reduced by using a leaf position constraint (LPC) that reduces the difference in the position of adjacent MLC leaves in the plan. The purpose of this study was to investigate the impact of the LPC on the quality of inversely optimized arc radiotherapy plans and the effect of the MLC motion pattern on the dosimetric accuracy of MLC tracking delivery. Specifically, the possibility of predicting the accuracy of MLC tracking delivery based on the plan modulation was investigated. Methods: Inversely optimized arc radiotherapy plans were created on CT-data of three lung cancer patients. For each case, five plans with a single 358 deg. arc were generated with LPC priorities of 0 (no LPC), 0.25, 0.5, 0.75, and 1 (highest possible LPC), respectively. All the plans had a prescribed dose of 2 Gy x 30, used 6 MV, a maximum dose rate of 600 MU/min and a collimator angle of 45 deg. or 315 deg. To quantify the plan modulation, an average adjacent leaf distance (ALD) was calculated by averaging the mean adjacent leaf distance for each control point. The linear relationship between the plan quality [i.e., the calculated dose distributions and the number of monitor units (MU)] and the LPC was investigated, and the linear regression coefficient as well as a two tailed confidence level of 95% was used in the evaluation. The effect of the plan modulation on the performance of MLC tracking was tested by delivering the plans to a cylindrical diode array phantom moving with sinusoidal motion in the superior-inferior direction with a peak-to-peak displacement of 2 cm and a cycle time of 6 s. The delivery was adjusted to the target motion using MLC tracking, guided in real-time by an infrared optical system. The dosimetric results were evaluated using gamma index evaluation with static target measurements as reference. Results: The plan quality parameters did not depend significantly on the LPC (p {>=} 0.066), whereas the ALD depended significantly on the LPC (p < 0.001). The gamma index failure rate depended significantly on the ALD, weighted to the percentage of the beam delivered in each control point of the plan (ALD{sub w}) when MLC tracking was used (p < 0.001), but not for delivery without MLC tracking (p {>=} 0.342). The gamma index failure rate with the criteria of 2% and 2 mm was decreased from > 33.9% without MLC tracking to <31.4% (LPC 0) and <2.2% (LPC 1) with MLC tracking. Conclusions: The results indicate that the dosimetric robustness of MLC tracking delivery of an inversely optimized arc radiotherapy plan can be improved by incorporating leaf position constraints in the objective function without otherwise affecting the plan quality. The dosimetric robustness may be estimated prior to delivery by evaluating the ALD{sub w} of the plan.

Falk, Marianne; Larsson, Tobias; Keall, Paul; Chul Cho, Byung; Aznar, Marianne; Korreman, Stine; Poulsen, Per; Munck af Rosenschoeld, Per [Radiation Medicine Research Center, Department of Radiation Oncology - 3994, Rigshospitalet, Blegdamsvej 9, DK - 2100 Copenhagen (Denmark) and Niels Bohr Institute, University of Copenhagen (Denmark); Radiation Medicine Research Center, Department of Radiation Oncology, Rigshospitalet, Copenhagen University Hospital (Denmark); Radiation Physics Laboratory, Sydney Medical School, University of Sydney (Australia); Department of Radiation Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul (Korea, Republic of); Radiation Medicine Research Center, Department of Radiation Oncology, Rigshospitalet, Copenhagen University Hospital, Denmark and Niels Bohr Institute, University of Copenhagen (Denmark); Radiation Medicine Research Center, Department of Radiation Oncology, Rigshospitalet, Copenhagen University Hospital (Denmark); Niels Bohr Institute, University of Copenhagen (Denmark) and Department of Science, Systems and Models, Roskilde University (Denmark); Department of Oncology, Aarhus University Hospital (Denmark); Radiation Medicine Research Center, Department of Radiation Oncology, Rigshospitalet, Copenhagen University Hospital (Denmark) and Niels Bohr Institute, University of Copenhagen (Denmark)

2012-03-15T23:59:59.000Z

147

Expansion and Collapse of Liquid Aluminum Foams  

Science Conference Proceedings (OSTI)

ESP Dust Recovery Process Test Works, Plant Trial, Commissioning, Operations and Metallurgical Performance · Expansion and Collapse of Liquid Aluminum ...

148

Cluster Expansion Methods - Progress and Outlook  

Science Conference Proceedings (OSTI)

Symposium, Computational Thermodynamics and Kinetics. Presentation Title, Cluster Expansion Methods - Progress and Outlook. Author(s), Axel van de Walle .

149

Exploration of Resource and Transmission Expansion Decisions  

E-Print Network (OSTI)

Exploration of Resource and Transmission Expansion Decisions in the Western Renewable Energyin.S. Department of Energy, Office of Electricity Delivery and Energy Reliability, Permitting, Siting and Analysis Division #12;Resource and Transmission ExpansionResource and Transmission Expansion Decisions in WREZ

150

Nonabelian plasma instabilities in Bjorken expansion  

E-Print Network (OSTI)

Plasma instabilities are parametrically the dominant nonequilibrium dynamics of a weakly coupled quark-gluon plasma. In recent years the time evolution of the corresponding collective colour fields has been studied in stationary anisotropic situations. Here I report on recent numerical results on the time evolution of the most unstable modes in a longitudinally expanding plasma as they grow from small rapidity fluctuations to amplitudes where non-Abelian self-interactions become important.

Anton Rebhan

2008-10-15T23:59:59.000Z

151

Disaggregated memory for expansion and sharing in blade servers  

Science Conference Proceedings (OSTI)

Analysis of technology and application trends reveals a growing imbalance in the peak compute-to-memory-capacity ratio for future servers. At the same time, the fraction contributed by memory systems to total datacenter costs and power consumption during ... Keywords: disaggregated memory, memory blades, memory capacity expansion, power and cost efficiencies

Kevin Lim; Jichuan Chang; Trevor Mudge; Parthasarathy Ranganathan; Steven K. Reinhardt; Thomas F. Wenisch

2009-06-01T23:59:59.000Z

152

Small lesions evaluation based on unsupervised cluster analysis of signal-intensity time courses in dynamic breast MRI  

Science Conference Proceedings (OSTI)

An application of an unsupervised neural network-based computer-aided diagnosis (CAD) system is reported for the detection and characterization of small indeterminate breast lesions, average size 1.1 mm, in dynamic contrast-enhanced MRI. This system ...

A. Meyer-Baese; T. Schlossbauer; O. Lange; A. Wismueller

2009-01-01T23:59:59.000Z

153

Time--Distance Helioseismology Data Analysis Pipeline for Helioseismic and Magnetic Imager onboard Solar Dynamics Observatory (SDO/HMI) and Its Initial Results  

E-Print Network (OSTI)

The Helioseismic and Magnetic Imager onboard the Solar Dynamics Observatory (SDO/HMI) provides continuous full-disk observations of solar oscillations. We develop a data-analysis pipeline based on the time-distance helioseismology method to measure acoustic travel times using HMI Doppler-shift observations, and infer solar interior properties by inverting these measurements. The pipeline is used for routine production of near-real-time full-disk maps of subsurface wave-speed perturbations and horizontal flow velocities for depths ranging from 0 to 20 Mm, every eight hours. In addition, Carrington synoptic maps for the subsurface properties are made from these full-disk maps. The pipeline can also be used for selected target areas and time periods. We explain details of the pipeline organization and procedures, including processing of the HMI Doppler observations, measurements of the travel times, inversions, and constructions of the full-disk and synoptic maps. Some initial results from the pipeline, includin...

Zhao, J; Bogart, R S; Parchevsky, K V; Birch, A C; Duvall, T L; Beck, J G; Kosovichev, A G; Scherrer, P H

2011-01-01T23:59:59.000Z

154

EIS-0404: Los Vaqueros Reservoir Expansion Project, California | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

404: Los Vaqueros Reservoir Expansion Project, California 404: Los Vaqueros Reservoir Expansion Project, California EIS-0404: Los Vaqueros Reservoir Expansion Project, California Summary This EIS/Environmental Impact Report was prepared by the Department of the Interior (Bureau of Reclamation, Mid-Pacific Region) and the Contra Costa Water District to evaluate the environmental impacts of a proposal to enlarge the existing Los Vaqueros Reservoir in Contra Costa County, California. DOE's Western Area Power Administration (Western) was a cooperating agency because it has jurisdiction over transmission facilities that were expected to be relocated under the proposed action. Based on project changes, however, Western has no action and therefore will not adopt the EIS or issue a ROD. Public Comment Opportunities No public comment opportunities available at this time.

155

EIS-0488: Cameron Pipeline Expansion Project and Cameron LNG Liquefaction  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8: Cameron Pipeline Expansion Project and Cameron LNG 8: Cameron Pipeline Expansion Project and Cameron LNG Liquefaction Project, Cameron Parish, LA EIS-0488: Cameron Pipeline Expansion Project and Cameron LNG Liquefaction Project, Cameron Parish, LA SUMMARY Federal Energy Regulatory Commission (FERC) is preparing an EIS, with DOE as a cooperating agency, to analyze the potential environmental impacts of a proposal to expand the existing Cameron Pipeline by 21 miles (from Calcasieu to Beauregard Parishes, Louisiana, with modifications in Cameron Parish), and expand an existing liquefied natural gas (LNG) import terminal in Cameron Parish, Louisiana, to enable the terminal to liquefy and export the LNG. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD August 13, 2012 EIS-0488: Notice of Intent to Prepare an Environmental Impact Statement

156

Far-from-equilibrium quantum many-body dynamics  

E-Print Network (OSTI)

The theory of real-time quantum many-body dynamics as put forward in Ref. [arXiv:0710.4627] is evaluated in detail. The formulation is based on a generating functional of correlation functions where the Keldysh contour is closed at a given time. Extending the Keldysh contour from this time to a later time leads to a dynamic flow of the generating functional. This flow describes the dynamics of the system and has an explicit causal structure. In the present work it is evaluated within a vertex expansion of the effective action leading to time evolution equations for Green functions. These equations are applicable for strongly interacting systems as well as for studying the late-time behaviour of nonequilibrium time evolution. For the specific case of a bosonic N-component phi^4 theory with contact interactions an s-channel truncation is identified to yield equations identical to those derived from the 2PI effective action in next-to-leading order of a 1/N expansion. The presented approach allows to directly ob...

Gasenzer, Thomas; Pawlowski, Jan M

2010-01-01T23:59:59.000Z

157

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

E-Print Network (OSTI)

This thesis presents a web-based approach to lighting three-dimensional geometry in a virtual scene. The use of High Dynamic Range (HDR) images for the lighting model makes it possible to convey a greater sense of photorealism than can be provided with a conventional computer generated three-point lighting setup. The use of QuickTime ™ Object Virtual Reality to display the three-dimensional geometry offers a sophisticated user experience and a convenient method for viewing virtual objects over the web. With this work, I generate original High Dynamic Range images for the purpose of image-based lighting and use the QuickTime ™ Object Virtual Reality framework to creatively alter the paradigm of object VR for use in object lighting. The result is two scenarios: one that allows for the virtual manipulation of an object within a lit scene, and another with the virtual manipulation of light around a static object. Future work might include the animation of High Dynamic Range image-based lighting, with emphasis on such features as depth of field and glare generation.

Cuellar, Tamara Melissa

2008-05-01T23:59:59.000Z

158

Electric Power Generation Expansion in Deregulated Markets.  

E-Print Network (OSTI)

??The generation expansion problem involves increasing electric power generation capacity in an existing power network. In competitive environment, power producers, distributors, and consumers all make… (more)

KAYMAZ, PINAR

2007-01-01T23:59:59.000Z

159

Cosmic Growth History and Expansion History  

E-Print Network (OSTI)

of the expansion history dark energy equation of state,and growth history constraints on the dark energy equationand growth history constraints on the dark energy equation

Linder, Eric V.

2009-01-01T23:59:59.000Z

160

Natural Gas Pipeline and System Expansions  

U.S. Energy Information Administration (EIA)

Energy Information Administration / Natural Gas Monthly April 1997 vii This special report examines recent expansions to the North American natural gas pipeline network

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Transmission Expansion Planning Using an AC Model  

E-Print Network (OSTI)

Jan 2, 2013 ... Abstract: Transmission expansion planning (TEP) is a rather complicated process which requires extensive studies to determine when, where ...

162

Resonant Polarized Radiation Catalysis, and the Expansion  

Science Conference Proceedings (OSTI)

Presentation Title, The Birth of a New Field of Materials Science: Resonant Polarized Radiation Catalysis, and the Expansion of Thermodynamics. Author(s)  ...

163

Energy Infrastructure Events and Expansions Infrastructure Security...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Year-in-Review: 2010 Energy Infrastructure Events and Expansions Infrastructure Security and Energy Restoration Office of Electricity Delivery and Energy Reliability U.S....

164

Query expansion techniques for question answering.  

E-Print Network (OSTI)

??Query expansion is a technique used to boost performance of a document retrieval engine, such as those commonly found in question answering (QA) systems. Common… (more)

Bilotti, Matthew W. (Matthew William), 1981-

2004-01-01T23:59:59.000Z

165

Cyberspace Security Econometrics System (CSES) Expansion to ...  

In typical usage, analysts create matrices that capture their expert opinion, and then use those matrices to quantify costs to stakeholders. This expansion

166

Real-Time Target Position Estimation Using Stereoscopic Kilovoltage/Megavoltage Imaging and External Respiratory Monitoring for Dynamic Multileaf Collimator Tracking  

SciTech Connect

Purpose: To develop a real-time target position estimation method using stereoscopic kilovoltage (kV)/megavoltage (MV) imaging and external respiratory monitoring, and to investigate the performance of a dynamic multileaf collimator tracking system using this method. Methods and Materials: The real-time three-dimensional internal target position estimation was established by creating a time-varying correlation model that connected the external respiratory signals with the internal target motion measured intermittently using kV/MV imaging. The method was integrated into a dynamic multileaf collimator tracking system. Tracking experiments were performed for 10 thoracic/abdominal traces. A three-dimensional motion platform carrying a gold marker and a separate one-dimensional motion platform were used to reproduce the target and external respiratory motion, respectively. The target positions were detected by kV (1 Hz) and MV (5.2 Hz) imaging, and external respiratory motion was captured by an optical system (30 Hz). The beam-target alignment error was quantified as the positional difference between the target and circular beam center on the MV images acquired during tracking. The correlation model error was quantified by comparing a model estimate and measured target positions. Results: The root-mean-square errors in the beam-target alignment that had ranged from 3.1 to 7.6 mm without tracking were reduced to <1.5 mm with tracking, except during the model building period (6 s). The root-mean-square error in the correlation model was submillimeters in all directions. Conclusion: A novel real-time target position estimation method was developed and integrated into a dynamic multileaf collimator tracking system and demonstrated an average submillimeter geometric accuracy after initializing the internal/external correlation model. The method used hardware tools available on linear accelerators and therefore shows promise for clinical implementation.

Cho, Byungchul, E-mail: bcho@amc.seoul.k [Department of Radiation Oncology, Stanford University, Stanford, CA (United States); Poulsen, Per Rugaard [Department of Radiation Oncology, Stanford University, Stanford, CA (United States); Department of Medical Physics, Department of Radiation Oncology, Aarhus University, Aarhus (Denmark); Sawant, Amit; Ruan, Dan; Keall, Paul J. [Department of Radiation Oncology, Stanford University, Stanford, CA (United States)

2011-01-01T23:59:59.000Z

167

Just-in-Time Learning Theory-Based Study on the Dynamic Model of Fuel Cell Engine System  

Science Conference Proceedings (OSTI)

Fuel cell car is characterized by zero pollution, high efficiency, low noise and the like. For component selection and control strategy development of fuel cell car, computer simulation is the most common method being adopted. In this paper, the acquisition ... Keywords: fuel cell, CAN, USB, just-in-time learning, system identification

Su Chuqi; Lin Xiang

2009-10-01T23:59:59.000Z

168

Thermally-induced expansion in the 8 GeV/c ? ? + 197 Au reaction.  

E-Print Network (OSTI)

Fragment kinetic energy spectra for reactions induced by 8.0 GeV/c ? ? beams incident on a 197 Au target have been analyzed in order to deduce the possible existence and influence of thermal expansion. The average fragment kinetic energies are observed to increase systematically with fragment charge and to be nearly independent of excitation energy. Comparison of the data with statistical multifragmentation models indicates the onset of extra collective thermal expansion near an excitation energy of E*/A ? 5 MeV. However, this effect is weak relative to the radial expansion observed in heavy-ion-induced reactions, consistent with the interpretation that the latter expansion may be driven primarily by dynamical effects such as compression/decompression. The origin of the multifragmentation process [1], and its link to a nuclear liquid-gas phase

T. Lefort; L. Beaulieu; A. Botvina; D. Dur; K. Kwiatkowski; W. -c. Hsi; B. Back; H. Breuer; S. Gushue; R. G. Korteling; R. Laforest

1999-01-01T23:59:59.000Z

169

Atomistic Time-Domain Simulations of Light-Harvesting and Charge-Transfer Dynamics in Novel Nanoscale Materials for Solar Hydrogen Production.  

Science Conference Proceedings (OSTI)

Funded by the DOE grant (i) we continued to study and analyze the atomistic detail of the electron transfer (ET) across the chromophore-TiO2 interface in Gratzel cell systems for solar hydrogen production. (ii) We extensively investigated the nature of photoexcited states and excited state dynamics in semiconductor quantum dots (QD) designed for photovoltaic applications. (iii) We continued a newly initiated research direction focusing on excited state properties and electron-phonon interactions in nanoscale carbon materials. Over the past year, the results of the DOE funded research were summarized in 3 review articles. 12 original manuscripts were written. The research results were reported in 28 invited talks at conferences and university seminars. 20 invitations were accepted for talks in the near future. 2 symposia at national and international meetings have being organized this year on topics closely related to the DOE funded project, and 2 more symposia have been planned for the near future. We summarized the insights into photoinduced dynamics of semiconductor QDs, obtained from our time-domain ab initio studies. QDs exhibit both molecular and bulk properties. Unlike either bulk or molecular materials, QD properties can be modified continuously by changing QD shape and size. However, the chemical and physical properties of molecular and bulk materials often contradict each other, which can lead to differing viewpoints about the behavior of QDs. For example, the molecular view suggests strong electron-hole and charge-phonon interactions, as well as slow energy relaxation due to mismatch between electronic energy gaps and phonon frequencies. In contrast, the bulk view advocates that the kinetic energy of quantum confinement is greater than electron-hole interactions, that charge-phonon coupling is weak, and that the relaxation through quasi-continuous bands is rapid. By synthesizing the bulk and molecular viewpoints, we clarified the controversies and provided a unified atomistic picture of the nature and dynamics of photoexcited states in semiconductor QDs. We also summarized our recent findings about the photoinduced electron dynamics at the chromophore-semiconductor interfaces from a time-domain ab initio perspective. The interface provides the foundation for a new, promising type of solar cell and presents a fundamentally important case study for several fields, including photo-, electro- and analytical chemistries, molecular electronics, and photography. Further, the interface offers a classic example of an interaction between an organic molecular species and an inorganic bulk material. Scientists employ different concepts and terminologies to describe molecular and solid states of matter, and these differences make it difficult to describe the interface with a single model. At the basic atomistic level of description, however, this challenge can be largely overcome. Recent advances in non-adiabatic molecular dynamics and time-domain density functional theory have created a unique opportunity for simulating the ultrafast, photoinduced processes on a computer very similar to the way that they occur in nature. These state-of-the-art theoretical tools offered a comprehensive picture of a variety of electron transfer processes that occur at the interface, including electron injection from the chromophore to the semiconductor, electron relaxation and delocalization inside the semiconductor, back-transfer of the electron to the chromophore and to the electrolyte, and regeneration of the neutral chromophore by the electrolyte. The ab initio time-domain modeling is particularly valuable for understanding these dynamic features of the ultrafast electron transfer processes, which cannot be represented by a simple rate description. We demonstrated using symmetry adapted cluster theory with configuration interaction (SAC-CI) that charging of small PbSe nanocrystals (NCs) greatly modifies their electronic states and optical excitations. Conduction and valence band transitions that are not available in neutral NCs dominate

Prezhdo, Oleg V.

2012-03-22T23:59:59.000Z

170

Atomistic Time-Domain Simulations of Light-Harvesting and Charge-Transfer Dynamics in Novel Nanoscale Materials for Solar Hydrogen Production.  

DOE Green Energy (OSTI)

Funded by the DOE grant (i) we continued to study and analyze the atomistic detail of the electron transfer (ET) across the chromophore-TiO2 interface in Gratzel cell systems for solar hydrogen production. (ii) We extensively investigated the nature of photoexcited states and excited state dynamics in semiconductor quantum dots (QD) designed for photovoltaic applications. (iii) We continued a newly initiated research direction focusing on excited state properties and electron-phonon interactions in nanoscale carbon materials. Over the past year, the results of the DOE funded research were summarized in 3 review articles. 12 original manuscripts were written. The research results were reported in 28 invited talks at conferences and university seminars. 20 invitations were accepted for talks in the near future. 2 symposia at national and international meetings have being organized this year on topics closely related to the DOE funded project, and 2 more symposia have been planned for the near future. We summarized the insights into photoinduced dynamics of semiconductor QDs, obtained from our time-domain ab initio studies. QDs exhibit both molecular and bulk properties. Unlike either bulk or molecular materials, QD properties can be modified continuously by changing QD shape and size. However, the chemical and physical properties of molecular and bulk materials often contradict each other, which can lead to differing viewpoints about the behavior of QDs. For example, the molecular view suggests strong electron-hole and charge-phonon interactions, as well as slow energy relaxation due to mismatch between electronic energy gaps and phonon frequencies. In contrast, the bulk view advocates that the kinetic energy of quantum confinement is greater than electron-hole interactions, that charge-phonon coupling is weak, and that the relaxation through quasi-continuous bands is rapid. By synthesizing the bulk and molecular viewpoints, we clarified the controversies and provided a unified atomistic picture of the nature and dynamics of photoexcited states in semiconductor QDs. We also summarized our recent findings about the photoinduced electron dynamics at the chromophore-semiconductor interfaces from a time-domain ab initio perspective. The interface provides the foundation for a new, promising type of solar cell and presents a fundamentally important case study for several fields, including photo-, electro- and analytical chemistries, molecular electronics, and photography. Further, the interface offers a classic example of an interaction between an organic molecular species and an inorganic bulk material. Scientists employ different concepts and terminologies to describe molecular and solid states of matter, and these differences make it difficult to describe the interface with a single model. At the basic atomistic level of description, however, this challenge can be largely overcome. Recent advances in non-adiabatic molecular dynamics and time-domain density functional theory have created a unique opportunity for simulating the ultrafast, photoinduced processes on a computer very similar to the way that they occur in nature. These state-of-the-art theoretical tools offered a comprehensive picture of a variety of electron transfer processes that occur at the interface, including electron injection from the chromophore to the semiconductor, electron relaxation and delocalization inside the semiconductor, back-transfer of the electron to the chromophore and to the electrolyte, and regeneration of the neutral chromophore by the electrolyte. The ab initio time-domain modeling is particularly valuable for understanding these dynamic features of the ultrafast electron transfer processes, which cannot be represented by a simple rate description. We demonstrated using symmetry adapted cluster theory with configuration interaction (SAC-CI) that charging of small PbSe nanocrystals (NCs) greatly modifies their electronic states and optical excitations. Conduction and valence band transitions that are not available in neutral NCs dominate

Prezhdo, Oleg V.

2012-03-22T23:59:59.000Z

171

EA-1763: Geothermal Expansion to Boise State University, City of Boise,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

763: Geothermal Expansion to Boise State University, City of 763: Geothermal Expansion to Boise State University, City of Boise, Boise, Idaho EA-1763: Geothermal Expansion to Boise State University, City of Boise, Boise, Idaho SUMMARY This EA evaluates the proposal to provide Federal funding to the City of Boise for the design and construction of an extension of the City's geothermal system onto the Boise State University. This proposal would be jointly funded by DOE and the Department of Housing and Urban Development. PUBLIC COMMENT OPPORTUNITIES There are none available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD December 23, 2010 EA-1763: Final Environmental Assessment Geothermal Expansion to Boise State University, Boise, Idaho December 23, 2010 EA-1763: Finding of No Significant Impact Geothermal Expansion to Boise State University, City of Boise, Ada County,

172

Bayesian model-independent evaluation of expansion rates of the universe  

E-Print Network (OSTI)

Marginal likelihoods for the cosmic expansion rates are evaluated using the `Constitution' data of 397 supernovas, thereby updating the results in some previous works. Even when beginning with a very strong prior probability that favors an accelerated expansion, we obtain a marginal likelihood for the deceleration parameter $q_0$ peaked around zero in the spatially flat case. It is also found that the new data significantly constrains the cosmographic expansion rates, when compared to the previous analyses. These results may strongly depend on the Gaussian prior probability distribution chosen for the Hubble parameter represented by $h$, with $h=0.68\\pm 0.06$. This and similar priors for other expansion rates were deduced from previous data. Here again we perform the Bayesian model-independent analysis in which the scale factor is expanded into a Taylor series in time about the present epoch. Unlike such Taylor expansions in terms of redshift, this approach has no convergence problem.

Moncy V. John

2010-03-31T23:59:59.000Z

173

Self-Similar Nonlinear Dynamical Solutions for One-Component Nonneutral Plasma in a Time-Dependent Linear Focusing Field  

Science Conference Proceedings (OSTI)

In a linear trap confining a one-component nonneutral plasma, the external focusing force is a linear function of the configuration coordinates and/or the velocity coordinates. Linear traps include the classical Paul trap and the Penning trap, as well as the newly proposed rotating-radio- frequency traps and the Mobius accelerator. This paper describes a class of self-similar nonlinear solutions of nonneutral plasma in general time-dependent linear focusing devices, with self-consistent electrostatic field. This class of nonlinear solutions includes many known solutions as special cases.

Hong Qin and Ronald C. Davidson

2011-07-19T23:59:59.000Z

174

Space Time Matter inflation  

E-Print Network (OSTI)

We study a model of power-law inflationary inflation using the Space-Time-Matter (STM) theory of gravity for a five dimensional (5D) canonical metric that describes an apparent vacuum. In this approach the expansion is governed by a single scalar (neutral) quantum field. In particular, we study the case where the power of expansion of the universe is $p \\gg 1$. This kind of model is more successful than others in accounting for galaxy formation.

Mariano Anabitarte; Mauricio Bellini

2005-08-31T23:59:59.000Z

175

Concentric ring flywheel without expansion separators  

DOE Patents (OSTI)

A concentric ring flywheel wherein the adjacent rings are configured to eliminate the need for differential expansion separators between the adjacent rings. This is accomplished by forming a circumferential step on an outer surface of an inner concentric ring and forming a matching circumferential step on the inner surface of an adjacent outer concentric ring. During operation the circumferential steps allow the rings to differentially expand due to the difference in the radius of the rings without the formation of gaps therebetween, thereby eliminating the need for expansion separators to take up the gaps formed by differential expansion.

Kuklo, Thomas C. (Oakdale, CA)

1999-01-01T23:59:59.000Z

176

Concentric ring flywheel without expansion separators  

DOE Patents (OSTI)

A concentric ring flywheel wherein the adjacent rings are configured to eliminate the need for differential expansion separators between the adjacent rings. This is accomplished by forming a circumferential step on an outer surface of an inner concentric ring and forming a matching circumferential step on the inner surface of an adjacent outer concentric ring. During operation the circumferential steps allow the rings to differentially expand due to the difference in the radius of the rings without the formation of gaps therebetween, thereby eliminating the need for expansion separators to take up the gaps formed by differential expansion. 3 figs.

Kuklo, T.C.

1999-08-24T23:59:59.000Z

177

Correlation between thermal expansion and heat capacity  

E-Print Network (OSTI)

Theoretically predicted linear correlation between the volume coefficient of thermal expansion and the thermal heat capacity was investigated for highly symmetrical atomic arrangements. Normalizing the data of these thermodynamic parameters to the Debye temperature gives practically identical curves from zero Kelvin to the Debye temperature. This result is consistent with the predicted linear correlation. At temperatures higher than the Debye temperature the normalized values of the thermal expansion are always higher than the normalized value of the heat capacity. The detected correlation has significant computational advantage since it allows calculating the volume coefficient of thermal expansion from one experimental data by using the Debye function.

Jozsef Garai

2004-04-25T23:59:59.000Z

178

Dynamical System Analysis of Cosmologies with Running Cosmological Constant from Quantum Einstein Gravity  

E-Print Network (OSTI)

We discuss a mechanism that induces a time-dependent vacuum energy on cosmological scales. It is based on the instability induced renormalization triggered by the low energy quantum fluctuations in a Universe with a positive cosmological constant. We employ the dynamical systems approach to study the qualitative behavior of Friedmann-Robertson-Walker cosmologies where the cosmological constant is dynamically evolving according with this nonperturbative scaling at low energies. It will be shown that it is possible to realize a "two regimes" dark energy phases, where an unstable early phase of power-law evolution of the scale factor is followed by an accelerated expansion era at late times.

Bonanno, Alfio

2011-01-01T23:59:59.000Z

179

Scenario construction and reduction applied to stochastic power generation expansion planning  

Science Conference Proceedings (OSTI)

A challenging aspect of applying stochastic programming in a dynamic setting is to construct a set of discrete scenarios that well represents multivariate stochastic processes for uncertain parameters. Often this is done by generating a scenario tree ... Keywords: Power generation expansion planning, Scenario generation, Scenario reduction, Stochastic programming

Yonghan Feng; Sarah M. Ryan

2013-01-01T23:59:59.000Z

180

Expansion of high pressure gas into air - A more realistic blast wave model  

Science Conference Proceedings (OSTI)

In this paper, we consider a more realistic model of a spherical blast wave of moderate strength. An arbitrary number of terms for the series solution in each of the regions behind the main shock-the expansion region, the nearly uniform region outside ... Keywords: Blast wave, Compressible flow, Explosion, Gas dynamics, Shock wave

Ejanul Haque; Philip Broadbridge; P. L. Sachdev

2009-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Controlling the Expansion of Laser-Fusion Plasma to Minimize Impact Damage  

DOE Green Energy (OSTI)

I propose to analytically model the rapid, nonequilibrium expansion of laser-fusion plasma from an initial diameter of 1 mm to a final diameter of 10 m. The aim is to devise a counterforce that minimizes the impact damage on optics by laser-plasma debris. This flow model is the basis of an idea for a dynamic target that efficiently converts laser energy to x-rays while minimizing the total mass propelled as debris. Also, the flow model is the basis of an idea to magnetically deflect material away from the optic ports in the vacuum chamber wall. The model combines results for supersonic one-dimensional gas flow of cylindrical-hemispherical symmetry, with a transition from thermal to nonequilibrium (''frozen'') plasma flow, which is set differently along each characteristic line (the ''Bray criterion'' as a Riemann invariant). The model shows how density, pressure, velocity, ionization fraction, electron temperature, and electrical conductivity vary over space and time, given an impulsively-heated source mass. The model is analytical, and examples are calculated on a desktop computer. This ease-of-use makes it possible to iterate quickly when refining ideas, such as a dynamic metal-vapor target that propels minimal debris, and a magnetohydrodynamic generator as a brake on the flow speed directed at the optic ports. The work involved here is that of an individual refining his analysis.

Garcia, M.

1999-03-18T23:59:59.000Z

182

Underwater Gas Expansion and Deflagration  

E-Print Network (OSTI)

The underwater combustion of a propane-air mixture in an acrylic cylinder is captured on video from multiple angles. This experiment is designed to provide visual data and pressure time-histories for future CFD validation studies.

Jones, Van; Gilbert, John; McCue-Weil, Leigh

2013-01-01T23:59:59.000Z

183

Entropic Time  

Science Conference Proceedings (OSTI)

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

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

2011-03-14T23:59:59.000Z

184

Meteorological Network Expansion Using Information Decay Concept  

Science Conference Proceedings (OSTI)

A generalized network design methodology was developed by using the basic entropy concept introduced by Shannon in communication engineering. In order to select potential sites for meteorological network expansion purposes, the meteorological ...

Tahir Husain; Mustafa A. Ukayli; Hasin U. Khan

1986-03-01T23:59:59.000Z

185

Ocotillo Wind I Expansion | Open Energy Information  

Open Energy Info (EERE)

I Expansion I Expansion Jump to: navigation, search Name Ocotillo Wind I Expansion Facility Ocotillo Wind I Expansion Sector Wind energy Facility Type Commercial Scale Wind Facility Status Under Construction Owner Pattern Energy Developer Pattern Energy Energy Purchaser San Diego Gas & Electric Location Ocotillo CA Coordinates 32.76302656°, -116.0466957° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.76302656,"lon":-116.0466957,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

186

Century Wind Project Expansion | Open Energy Information  

Open Energy Info (EERE)

Project Expansion Project Expansion Jump to: navigation, search Name Century Wind Project Expansion Facility Century Wind Project Expansion Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner MidAmerican Energy Developer EnXco Energy Purchaser MidAmerican Energy Location Wright and Hamilton Counties IA Coordinates 42.509141°, -93.682151° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.509141,"lon":-93.682151,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

187

Motiva Enterprises Refinery Expansion Groundbreaking | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

it. When this expansion is complete this facility which is now one of the preeminent refineries on the Gulf Coast will become the largest in the United States and one of the...

188

Transmission Expansion Planning with Re-design  

E-Print Network (OSTI)

Expanding an electrical transmission network requires heavy investments ... Long term transmission expansion planning determines, over an horizon of 10 or more years, ... generation sites are usually far away from the consumption centers.

189

Quantization Noise Shaping on Arbitrary Frame Expansions  

E-Print Network (OSTI)

Quantization noise shaping is commonly used in oversampled A/D and D/A converters with uniform sampling. This paper considers quantization noise shaping for arbitrary finite frame expansions based on generalizing the view ...

Boufounos, Petros T.

190

Flat Ridge 2 Expansion | Open Energy Information  

Open Energy Info (EERE)

Flat Ridge 2 Expansion Flat Ridge 2 Expansion Jump to: navigation, search Name Flat Ridge 2 Expansion Facility Flat Ridge 2 Expansion Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner BP Wind Energy Developer BP Wind Energy Energy Purchaser Arkansas Electric Cooperative Corp Location Sharon KS Coordinates 37.383239°, -98.334088° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.383239,"lon":-98.334088,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

191

PPN expansion and FRW scalar perturbations in n-DBI gravity  

E-Print Network (OSTI)

n-DBI gravity explicitly breaks Lorentz invariance by the introduction of a unit time-like vector field, thereby giving rise to an extra (scalar) degree of freedom. We look for observational consequences of this mode in two setups. Firstly, we compute the parametrized post-Newtonian (PPN) expansion of the metric to first post-Newtonian order. Surprisingly, we find that the PPN parameters are exactly the same as in General Relativity (GR), and no preferred-frame effects are produced. In particular this means that n-DBI gravity is consistent with all GR solar system experimental tests. We discuss the origin of such degeneracy between n-DBI gravity and GR, and suggest it may also hold in higher post-Newtonian order. Secondly, we study gravitational scalar perturbations of a generic Friedmann-Robertson-Walker space-time. We show the dynamics of these perturbations is determined by an effective field theory for a single scalar. This scalar has an oscillatory solution which decays as the Universe expands; the solution, moreover, and in contrast with a canonical scalar field coupled to GR, does not freeze on superhorizon scales. Such behaviour leads to the following novel feature: the power spectrum depends on the complete time evolution of the scalar perturbations, including their superhorizon evolution and not just their amplitude at horizon exit during the inflationary era.

Flávio S. Coelho; Carlos Herdeiro; Shinji Hirano; Yuki Sato

2013-07-17T23:59:59.000Z

192

ON THE COMPETITION BETWEEN RADIAL EXPANSION AND COULOMB COLLISIONS IN SHAPING THE ELECTRON VELOCITY DISTRIBUTION FUNCTION: KINETIC SIMULATIONS  

Science Conference Proceedings (OSTI)

We present numerical simulations of the solar wind using a fully kinetic model which takes into account the effects of particle's binary collisions in a quasi-neutral plasma in spherical expansion. Starting from an isotropic Maxwellian velocity distribution function for the electrons, we show that the combined effect of expansion and Coulomb collisions leads to the formation of two populations: a collision-dominated cold and dense population almost isotropic in velocity space and a weakly collisional, tenuous field-aligned and antisunward drifting population generated by mirror force focusing in the radially decreasing magnetic field. The relative weights and drift velocities for the two populations observed in our simulations are in excellent agreement with the relative weights and drift velocities for both core and strahl populations observed in the real solar wind. The radial evolution of the main moments of the electron velocity distribution function is in the range observed in the solar wind. The electron temperature anisotropy with respect to the magnetic field direction is found to be related to the ratio between the collisional time and the solar wind expansion time. Even though collisions are found to shape the electron velocity distributions and regulate the properties of the strahl, it is found that the heat flux is conveniently described by a collisionless model where a fraction of the electron thermal energy is advected at the solar wind speed. This reinforces the currently largely admitted fact that collisions in the solar wind are clearly insufficient to force the electron heat flux obey the classical Spitzer-Haerm expression where heat flux and temperature gradient are proportional to each other. The presented results show that the electron dynamics in the solar wind cannot be understood without considering the role of collisions.

Landi, S.; Matteini, L. [Dipartimento di Fisica e Astronomia, Universita degli Studi di Firenze Largo E. Fermi 2, I-50125 Firenze (Italy); Pantellini, F. [LESIA, Observatoire de Paris 5, Place J. Janssen, F-92195 Meudon Cedex (France)

2012-12-01T23:59:59.000Z

193

EA-0845: Expansion of the Idaho National Engineering Laboratory...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Marketing Administration Other Agencies You are here Home EA-0845: Expansion of the Idaho National Engineering Laboratory Research Center, Idaho Falls, Idaho EA-0845: Expansion...

194

Year-in-Review: 2012 Energy Infrastructure Events and Expansions...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Year-in-Review: 2012 Energy Infrastructure Events and Expansions Now Available (July 2013) Year-in-Review: 2012 Energy Infrastructure Events and Expansions Now Available (July...

195

Secretary Chu Celebrates Expansion of Lithium-Ion Battery Production...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Celebrates Expansion of Lithium-Ion Battery Production in North Carolina Secretary Chu Celebrates Expansion of Lithium-Ion Battery Production in North Carolina July 26, 2011 -...

196

Combining Positive and Negative Thermal Expansion Materials to ...  

Science Conference Proceedings (OSTI)

Presentation Title, Combining Positive and Negative Thermal Expansion Materials to Tailor the Coefficient of Thermal Expansion in Metal/Ceramic Composites.

197

EIS-0488: Cameron Pipeline Expansion Project and Cameron LNG...  

NLE Websites -- All DOE Office Websites (Extended Search)

88: Cameron Pipeline Expansion Project and Cameron LNG Liquefaction Project, Cameron Parish, LA EIS-0488: Cameron Pipeline Expansion Project and Cameron LNG Liquefaction Project,...

198

EIA - Natural Gas Pipeline Network - Expansion Process Flow Diagram  

Annual Energy Outlook 2012 (EIA)

Natural Gas based on data through 20072008 with selected updates Development and Expansion Process For Natural Gas Pipeline Projects Figure showing the expansion process...

199

Expansion and Improvement of Solar Water Heating Technology in...  

Open Energy Info (EERE)

Expansion and Improvement of Solar Water Heating Technology in China Project Management Office Jump to: navigation, search Name Expansion and Improvement of Solar Water Heating...

200

Unmanned Aerial Vehicle (UAV) Dynamic-Tracking Directional Wireless Antennas for Low Powered Applications that Require Reliable Extended Range Operations in Time Critical Scenarios  

Science Conference Proceedings (OSTI)

The proven value of DOD Unmanned Aerial Vehicles (UAVs) will ultimately transition to National and Homeland Security missions that require real-time aerial surveillance, situation awareness, force protection, and sensor placement. Public services first responders who routinely risk personal safety to assess and report a situation for emergency actions will likely be the first to benefit from these new unmanned technologies. ‘Packable’ or ‘Portable’ small class UAVs will be particularly useful to the first responder. They require the least amount of training, no fixed infrastructure, and are capable of being launched and recovered from the point of emergency. All UAVs require wireless communication technologies for real- time applications. Typically on a small UAV, a low bandwidth telemetry link is required for command and control (C2), and systems health monitoring. If the UAV is equipped with a real-time Electro-Optical or Infrared (EO/Ir) video camera payload, a dedicated high bandwidth analog/digital link is usually required for reliable high-resolution imagery. In most cases, both the wireless telemetry and real-time video links will be integrated into the UAV with unity gain omni-directional antennas. With limited on-board power and payload capacity, a small UAV will be limited with the amount of radio-frequency (RF) energy it transmits to the users. Therefore, ‘packable’ and ‘portable’ UAVs will have limited useful operational ranges for first responders. This paper will discuss the limitations of small UAV wireless communications. The discussion will present an approach of utilizing a dynamic ground based real-time tracking high gain directional antenna to provide extend range stand-off operation, potential RF channel reuse, and assured telemetry and data communications from low-powered UAV deployed wireless assets.

Scott G. Bauer; Matthew O. Anderson; James R. Hanneman

2005-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
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201

Nonlinear Fluid Dynamics from Gravity  

E-Print Network (OSTI)

Black branes in AdS5 appear in a four parameter family labeled by their velocity and temperature. Promoting these parameters to Goldstone modes or collective coordinate fields -- arbitrary functions of the coordinates on the boundary of AdS5 -- we use Einstein's equations together with regularity requirements and boundary conditions to determine their dynamics. The resultant equations turn out to be those of boundary fluid dynamics, with specific values for fluid parameters. Our analysis is perturbative in the boundary derivative expansion but is valid for arbitrary amplitudes. Our work may be regarded as a derivation of the nonlinear equations of boundary fluid dynamics from gravity. As a concrete application we find an explicit expression for the expansion of this fluid stress tensor including terms up to second order in the derivative expansion.

Sayantani Bhattacharyya; Veronika E Hubeny; Shiraz Minwalla; Mukund Rangamani

2007-12-14T23:59:59.000Z

202

Expansion analyses of strategic petroleum reserve in Bayou Choctaw : revised locations.  

SciTech Connect

This report summarizes a series of three-dimensional simulations for the Bayou Choctaw Strategic Petroleum Reserve. The U.S. Department of Energy plans to leach two new caverns and convert one of the existing caverns within the Bayou Choctaw salt dome to expand its petroleum reserve storage capacity. An existing finite element mesh from previous analyses is modified by changing the locations of two caverns. The structural integrity of the three expansion caverns and the interaction between all the caverns in the dome are investigated. The impacts of the expansion on underground creep closure, surface subsidence, infrastructure, and well integrity are quantified. Two scenarios were used for the duration and timing of workover conditions where wellhead pressures are temporarily reduced to atmospheric pressure. The three expansion caverns are predicted to be structurally stable against tensile failure for both scenarios. Dilatant failure is not expected within the vicinity of the expansion caverns. Damage to surface structures is not predicted and there is not a marked increase in surface strains due to the presence of the three expansion caverns. The wells into the caverns should not undergo yield. The results show that from a structural viewpoint, the locations of the two newly proposed expansion caverns are acceptable, and all three expansion caverns can be safely constructed and operated.

Ehgartner, Brian L.; Park, Byoung Yoon

2010-11-01T23:59:59.000Z

203

Electromagnetic Real-Time Tumor Position Monitoring and Dynamic Multileaf Collimator Tracking Using a Siemens 160 MLC: Geometric and Dosimetric Accuracy of an Integrated System  

SciTech Connect

Purpose: Dynamic multileaf collimator tracking represents a promising method for high-precision radiotherapy to moving tumors. In the present study, we report on the integration of electromagnetic real-time tumor position monitoring into a multileaf collimator-based tracking system. Methods and Materials: The integrated system was characterized in terms of its geometric and radiologic accuracy. The former was assessed from portal images acquired during radiation delivery to a phantom in tracking mode. The tracking errors were calculated from the positions of the tracking field and of the phantom as extracted from the portal images. Radiologic accuracy was evaluated from film dosimetry performed for conformal and intensity-modulated radiotherapy applied to different phantoms moving on sinusoidal trajectories. A static radiation delivery to the nonmoving target served as a reference for the delivery to the moving phantom with and without tracking applied. Results: Submillimeter tracking accuracy was observed for two-dimensional target motion despite the relatively large system latency of 500 ms. Film dosimetry yielded almost complete recovery of a circular dose distribution with tracking in two dimensions applied: 2%/2 mm gamma-failure rates could be reduced from 59.7% to 3.3%. For single-beam intensity-modulated radiotherapy delivery, accuracy was limited by the finite leaf width. A 2%/2 mm gamma-failure rate of 15.6% remained with tracking applied. Conclusion: The integrated system we have presented marks a major step toward the clinical implementation of high-precision dynamic multileaf collimator tracking. However, several challenges such as irregular motion traces or a thorough quality assurance still need to be addressed.

Krauss, Andreas, E-mail: andreas.krauss@dkfz-heidelberg.d [Department of Medical Physics in Radiation Oncology, German Cancer Research Center (DKFZ), Heidelberg (Germany); Nill, Simeon; Tacke, Martin; Oelfke, Uwe [Department of Medical Physics in Radiation Oncology, German Cancer Research Center (DKFZ), Heidelberg (Germany)

2011-02-01T23:59:59.000Z

204

Forward Expansion Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Forward Expansion Wind Farm Forward Expansion Wind Farm Facility Forward Expansion Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Invenergy Developer Invenergy Energy Purchaser Alliant- Wisconsin Public Service-Madison Gas & Electric- Wisconsin Public Power Location Dodge and Fond du Lac Counties WI Coordinates 43.631519°, -88.556421° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.631519,"lon":-88.556421,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

205

DOE/EA-0845 Environmental Assessment Expansion  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

45 45 Environmental Assessment Expansion of the Idaho National Engineering Laboratory Research Center March 1994 U.S. Department of Energy MASTER DOE Idaho Operations Office Idaho Falls, Idaho _.OJ Oi_lll_lHl:lUTION OF TFII$O_r, UM_._T _ U_LJ_!_3'_ [6450-01] U.S. DEPARTMENT OF ENERGY FINDINGOF NO SIGNIFICANT IMPACT . FOR EXPANSION OF THE IDAHONATIONALENGINEERING LABORATORY RESEARCH CENTER AGENCY: Department of Energy ACTION: Findingof No Significant Impact(FONSI) SUMMARY: The Department of Energy(DOE)has prepared an environmental assessment (EA),DOE/EA-0845, for expansion and upgrade of facilities at the IdahoNationalEngineering Laboratory (INEL)Research Center(IRC)in Idaho Falls,Idaho. Construction and operation of proposed facilities wouldnot causesignificant environmental impacts. Basedon the analysesin the EA, DOE has determined that the proposedactionis

206

Real time wind turbine simulator.  

E-Print Network (OSTI)

??A novel dynamic real-time wind turbine simulator (WTS) is developed in this thesis, which is capable of reproducing dynamic behavior of real wind turbine. The… (more)

Gong, Bing

2007-01-01T23:59:59.000Z

207

Existing reactor expansion study basis  

SciTech Connect

The latest HAPO Five Year Program review, HW-59633, forecasts substantial increases in Pu production from the eight existing Hanford reactors over the next several years. These production increases would be attained by a combination of several methods which include increased reactor power levels resulting from higher process water flow rates and coolant bulk outlet temperatures, improved time operated efficiency, higher conversion ratios, and reduced transient reactivity losses. In order to provide a realistic basis for budgeting to meet these or other increased production goals, it is necessary that a study program be undertaken to determine in general terms the plant changes required to support these forecasted levels, to evaluate the economic and technical feasibility of achieving the process conditions, and to present an integrated program for achieving these objectives. This study program will necessarily consider the interrelated effects of a number of various facets of reactor and water plant process conditions, operational requirements, and proposed development programs. The purpose of this document is to present a plan for the execution of the proposed study. Included in this outline are a review of the basic study considerations, problem assignments and schedules, and manpower and cost estimates for the performance of the study.

Heacock, H.W.

1959-06-24T23:59:59.000Z

208

Relativistic Dynamics of Non-ideal Fluids: Viscous and heat-conducting fluids I. General Aspects and 3+1 Formulation for Nuclear Collisions  

E-Print Network (OSTI)

Relativistic non-ideal fluid dynamics is formulated in 3+1 space--time dimensions. The equations governing dissipative relativistic hydrodynamics are given in terms of the time and the 3-space quantities which correspond to those familiar from non-relativistic physics. Dissipation is accounted for by applying the causal theory of relativistic dissipative fluid dynamics. As a special case we consider a fluid without viscous/heat couplings in the causal system of transport/relaxation equations. For the study of physical systems we consider pure (1+1)-dimensional expansion in planar geometry, (1+1)-dimensional spherically symmetric ({\\em fireball}) expansion, (1+1)-dimensional cylindrically symmetric expansion and a (2+1)-dimensional expansion with cylindrical symmetry in the transverse plane ({\\em firebarell} expansion). The transport/relaxation equations are given in terms of the spatial components of the dissipative fluxes, since these are not independent. The choice for the independent components is analogous to the non-relativistic equations.

Azwinndini Muronga

2006-11-25T23:59:59.000Z

209

Dark Energy, Expansion History of the Universe, and SNAP  

E-Print Network (OSTI)

This talk presents a pedagogical discussion of how precision distance-redshift observations can map out the recent expansion history of the universe, including the present acceleration and the transition to matter dominated deceleration. The proposed Supernova/Acceleration Probe (SNAP) will carry out observations determining the components and equations of state of the energy density, providing insights into the cosmological model, the nature of the accelerating dark energy, and potentially clues to fundamental high energy physics theories and gravitation. This includes the ability to distinguish between various dynamical scalar field models for the dark energy, as well as higher dimension and alternate gravity theories. A new, advantageous parametrization for the study of dark energy to high redshift is also presented.

Eric V. Linder

2003-02-03T23:59:59.000Z

210

Expansion Capital Partners LLC | Open Energy Information  

Open Energy Info (EERE)

Expansion Capital Partners LLC Expansion Capital Partners LLC Jump to: navigation, search Name Expansion Capital Partners LLC Address One Embarcadero Center, Suite 4100 Place San Francisco, California Zip 94111 Region Bay Area Product Venture capital firm that invests in expansion-stage, clean technology enterprises Year founded 2001 Phone number (415) 788-8802 Website http://www.expansioncapital.co Coordinates 37.794497°, -122.39962° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.794497,"lon":-122.39962,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

211

Stateline Expansion Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Stateline Expansion Wind Farm Stateline Expansion Wind Farm Jump to: navigation, search Name Stateline Expansion Wind Farm Facility Stateline Expansion Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner NextEra Energy Resources Developer NextEra Energy Resources Energy Purchaser PPM Energy Inc Location Walla Walla County OR Coordinates 46.012769°, -118.751528° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":46.012769,"lon":-118.751528,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

212

Natural Gas Pipeline and System Expansions  

Reports and Publications (EIA)

This special report examines recent expansions tothe North American natural gas pipeline networkand the nature and type of proposed pipeline projects announced or approved for construction during the next several years in the United States. It includes those projects in Canada and Mexico that tie in with U.S. markets or projects.

Information Center

1997-04-01T23:59:59.000Z

213

Statistical source expansion for question answering  

Science Conference Proceedings (OSTI)

A source expansion algorithm automatically extends a given text corpus with related content from large external sources such as the Web. The expanded corpus is not intended for human consumption but can be used in question answering (QA) and other information ... Keywords: TREC, information retrieval, jeopardy, question answering, watson

Nico Schlaefer; Jennifer Chu-Carroll; Eric Nyberg; James Fan; Wlodek Zadrozny; David Ferrucci

2011-10-01T23:59:59.000Z

214

ARGONNE NATIONAL LABORATORY BUILDING 400A EXPANSION  

E-Print Network (OSTI)

ARGONNE NATIONAL LABORATORY LEMONT, IL BUILDING 400A EXPANSION 3 WEEK LOOK AHEAD SCHEDULE PROJECT Touch Up Paint X X X X X B&A Install Insulation At North Parapet Walls X X Scrub / Clean Floors X X Seal OPEN Final Clean Building X TRIUMPH Caulk Interior Floors / Concrete / Frames X X G&L Water Test

Kemner, Ken

215

Entity set expansion in opinion documents  

Science Conference Proceedings (OSTI)

Opinion mining has been an active research area in recent years. The task is to extract opinions expressed on entities and their attributes. For example, the sentence, "I love the picture quality of Sony cameras," expresses a positive opinion on the ... Keywords: entity extraction, set expansion, text mining

Lei Zhang; Bing Liu

2011-06-01T23:59:59.000Z

216

Intrepid Expansion Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Intrepid Expansion Wind Farm Intrepid Expansion Wind Farm Jump to: navigation, search Name Intrepid Expansion Wind Farm Facility Intrepid Expansion Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner MidAmerican Energy Developer MidAmerican Energy Energy Purchaser MidAmerican Energy Location Buena Vista & Sac Counties IA Coordinates 42.483311°, -95.308807° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.483311,"lon":-95.308807,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

217

Self-trapping dynamics in a 2D optical lattice  

E-Print Network (OSTI)

We describe theoretical models for the recent experimental observation of Macroscopic Quantum Self-Trapping (MQST) in the transverse dynamics of an ultracold bosonic gas in a 2D lattice. The pure mean-field model based on the solution of coupled nonlinear equations fails to reproduce the experimental observations. It greatly overestimates the initial expansion rates at short times and predicts a slower expansion rate of the cloud at longer times. It also predicts the formation of a hole surrounded by a steep square fort-like barrier which was not observed in the experiment. An improved theoretical description based on a simplified Truncated Wigner Approximation (TWA), which adds phase and number fluctuations in the initial conditions, pushes the theoretical results closer to the experimental observations but fails to quantitatively reproduce them. An explanation of the delayed expansion as a consequence of a new type of self-trapping mechanism, where quantum correlations suppress tunneling even when there are no density gradients, is discussed and supported by numerical time-dependent Density Matrix Renormalization Group (t-DMRG) calculations performed in a simplified two coupled tubes set-up.

Shuming Li; Salvatore R. Manmana; Ana Maria Rey; Rafael Hipolito; Aaron Reinhard; Jean-Félix Riou; Laura A. Zundel; David S. Weiss

2013-05-20T23:59:59.000Z

218

Experimental and computational study of complex shockwave dynamics in laser ablation plumes in argon atmosphere  

SciTech Connect

We investigated spatio-temporal evolution of ns laser ablation plumes at atmospheric pressure, a favored condition for laser-induced breakdown spectroscopy and laser-ablation inductively coupled plasma mass-spectrometry. The 1064 nm, 6 ns pulses from a Nd:YAG laser were focused on to an Al target and the generated plasma was allowed to expand in 1 atm Ar. The hydrodynamic expansion features were studied using focused shadowgraphy and gated 2 ns self-emission visible imaging. Shadowgram images showed material ejection and generation of shock fronts. A secondary shock is observed behind the primary shock during the time window of 100-500 ns with instabilities near the laser cone angle. By comparing the self-emission images obtained using fast photography, it is concluded that the secondary shocks observed in the shadowgraphy were generated by fast moving target material. The plume front estimates using fast photography exhibited reasonable agreement with data obtained from shadowgraphy at early times {<=}400 ns. However, at later times, fast photography images showed plume confinement while the shadowgraphic images showed propagation of the plume front even at greater times. The structure and dynamics of the plume obtained from optical diagnostic tools were compared to numerical simulations. We have shown that the main features of plume expansion in ambient Ar observed in the experiments can be reproduced using a continuum hydrodynamics model which provided valuable insight into the expansion dynamics and shock structure of the plasma plume.

Harilal, S. S.; Miloshevsky, G. V.; Diwakar, P. K.; LaHaye, N. L.; Hassanein, A. [Center for Materials under Extreme Environment, and School of Nuclear Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)

2012-08-15T23:59:59.000Z

219

216-B-3 expansion ponds closure plan  

SciTech Connect

This document describes the activities for clean closure under the Resource Conservation and Recovery Act of 1976 (RCRA) of the 216-B-3 Expansion Ponds. The 216-B-3 Expansion Ponds are operated by the US Department of Energy, Richland Operations Office (DOE-RL) and co-operated by Westinghouse Hanford Company (Westinghouse Hanford). The 216-B-3 Expansion Ponds consists of a series of three earthen, unlined, interconnected ponds that receive waste water from various 200 East Area operating facilities. The 3A, 3B, and 3C ponds are referred to as Expansion Ponds because they expanded the capability of the B Pond System. Waste water (primarily cooling water, steam condensate, and sanitary water) from various 200 East Area facilities is discharged to the Bypass pipe (Project X-009). Water discharged to the Bypass pipe flows directly into the 216-B-3C Pond. The ponds were operated in a cascade mode, where the Main Pond overflowed into the 3A Pond and the 3A Pond overflowed into the 3C Pond. The 3B Pond has not received waste water since May 1985; however, when in operation, the 3B Pond received overflow from the 3A Pond. In the past, waste water discharges to the Expansion Ponds had the potential to have contained mixed waste (radioactive waste and dangerous waste). The radioactive portion of mixed waste has been interpreted by the US Department of Energy (DOE) to be regulated under the Atomic Energy Act of 1954; the dangerous waste portion of mixed waste is regulated under RCRA.

1994-10-01T23:59:59.000Z

220

Scaling between structural relaxation and caged dynamics in Ca_{0.4}K_0.6(NO_{3})_{1.4} and glycerol: free volume, time scales and implications for the pressure-energy correlations  

E-Print Network (OSTI)

The scaling of the slow structural relaxation with the fast caged dynamics is evidenced in the molten salt Ca_{0.4}K_{0.6}(NO_{3}$)_{1.4} (CKN) over about thirteen decades of the structural relaxation time. Glycerol caling was analyzed in detail. In glycerol, the short-time mean-square displacement , a measure of the caged dynamics, is contributed by free-volume. It is seen that, in order to evidence the scaling, the observation time of the fast dynamics must be shorter than the time scales of the relaxation processes. Systems with both negligible (like CKN, glycerol and network glassformers) and high (like van der Waals liquids and polymers) pressure-energy correlations exhibit the scaling between the slow relaxation and the fast caged dynamics. According to the available experiments, an isomorph-invariant expression of the master curve of the scaled data is not distinguishable from a simpler not-invariant expression. Instead, the latter grees better with the simulations on a wide class of model polymers.

Alistar Ottochian; Dino Leporini

2011-01-14T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

New Constraints on the Early Expansion History  

E-Print Network (OSTI)

Cosmic microwave background measurements have pushed to higher resolution, lower noise, and more sky coverage. These data enable a unique test of the early universe's expansion rate and constituents such as effective number of relativistic degrees of freedom and dark energy. Using the most recent data from Planck and WMAP9, we constrain the expansion history in a model independent manner from today back to redshift z=10^5. The Hubble parameter is mapped to a few percent precision, limiting early dark energy and extra relativistic degrees of freedom within a model independent approach to 2-16% and 0.71 equivalent neutrino species respectively (95% CL). Within dark radiation, barotropic aether, and Doran-Robbers models, the early dark energy constraints are 3.3%, 1.9%, 1.2% respectively.

Hojjati, Alireza; Samsing, Johan

2013-01-01T23:59:59.000Z

222

Low thermal expansion seal ring support  

DOE Patents (OSTI)

Today, the trend is to increase the temperature of operation of gas turbine engines. To cool the components with compressor discharge air, robs air which could otherwise be used for combustion and creates a less efficient gas turbine engine. The present low thermal expansion sealing ring support system reduces the quantity of cooling air required while maintaining life and longevity of the components. Additionally, the low thermal expansion sealing ring reduces the clearance "C","C'" demanded between the interface between the sealing surface and the tip of the plurality of turbine blades. The sealing ring is supported by a plurality of support members in a manner in which the sealing ring and the plurality of support members independently expand and contract relative to each other and to other gas turbine engine components.

Dewis, David W. (San Diego, CA); Glezer, Boris (Del Mar, CA)

2000-01-01T23:59:59.000Z

223

Frostless heat pump having thermal expansion valves  

DOE Patents (OSTI)

A heat pump system having an operable relationship for transferring heat between an exterior atmosphere and an interior atmosphere via a fluid refrigerant and further having a compressor, an interior heat exchanger, an exterior heat exchanger, a heat pump reversing valve, an accumulator, a thermal expansion valve having a remote sensing bulb disposed in heat transferable contact with the refrigerant piping section between said accumulator and said reversing valve, an outdoor temperature sensor, and a first means for heating said remote sensing bulb in response to said outdoor temperature sensor thereby opening said thermal expansion valve to raise suction pressure in order to mitigate defrosting of said exterior heat exchanger wherein said heat pump continues to operate in a heating mode.

Chen, Fang C [Knoxville, TN; Mei, Viung C [Oak Ridge, TN

2002-10-22T23:59:59.000Z

224

Expansion-free Cylindrically Symmetric Models  

E-Print Network (OSTI)

This paper investigates cylindrically symmetric distribution of an-isotropic fluid under the expansion-free condition, which requires the existence of vacuum cavity within the fluid distribution. We have discussed two family of solutions which further provide two exact models in each family. Some of these solutions satisfy Darmois junction condition while some show the presence of thin shell on both boundary surfaces. We also formulate a relation between the Weyl tensor and energy density.

M. Sharif; Z. Yousaf

2013-10-30T23:59:59.000Z

225

Year-in-Review: 2012 Energy Infrastructure Events and Expansions...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Year-in-Review: 2012 Energy Infrastructure Events and Expansions (July 2013) Year-in-Review: 2012 Energy Infrastructure Events and Expansions (July 2013) The Year-in-Review (YIR):...

226

The Effectiveness of Query Expansion for Distributed Information Retrieval  

E-Print Network (OSTI)

The Effectiveness of Query Expansion for Distributed Information Retrieval Paul Ogilvie, Jamie information retrieval where complete collection information is available. One might expect that query expansion would then work for distributed information retrieval when complete collection information

Callan, Jamie

227

Expansion/De-expansion Tool to Quantify the Accuracy of Prostate Contours  

Science Conference Proceedings (OSTI)

Purpose: Accurate delineation of the prostate gland on computed tomography (CT) remains a persistent challenge and continues to introduce geometric uncertainty into the planning and delivery of external beam radiotherapy. We, therefore, developed an expansion/de-expansion tool to quantify the contour errors and determine the location of the deviations. Methods and Materials: A planning CT scan and magnetic resonance imaging scan were prospectively acquired for 10 patients with prostate cancer. The prostate glands were contoured by 3 independent observers using the CT data sets with instructions to contour the prostate without underestimation but to minimize overestimation. The standard prostate for each patient was defined using magnetic resonance imaging and CT on multiple planes. After registration of the CT and magnetic resonance imaging data sets, the CT-defined prostates were scored for accuracy. The contours were defined as ideal if they were within a 2.5-mm expansion of the standard without underestimation, acceptable if they were within a 5.0-mm expansion and a 2.5-mm de-expansion, and unacceptable if they extended >5.0 mm or underestimated the prostate by >2.5 mm. Results: A total of 636 CT slices were individually analyzed, with the vast majority scored as ideal or acceptable. However, none of the 30 prostate contour sets had all the contours scored as ideal or acceptable. For all 3 observers, the unacceptable contours were more likely from underestimation than overestimation of the prostate. The errors were more common at the base and apex than the mid-gland. Conclusions: The expansion/de-expansion tool allows for directed feedback on the location of contour deviations, as well as the determination of over- or underestimation of the prostate. This metric might help improve the accuracy of prostate contours.

Chung, Eugene; Stenmark, Matthew H. [Department of Radiation Oncology, University of Michigan, Ann Arbor, MI (United States); Evans, Cheryl [Department of Radiation Oncology, Providence Cancer Center, Novi, MI (United States); Narayana, Vrinda [Department of Radiation Oncology, University of Michigan, Ann Arbor, MI (United States); Department of Radiation Oncology, Providence Cancer Center, Novi, MI (United States); McLaughlin, Patrick W., E-mail: mclaughb@med.umich.edu [Department of Radiation Oncology, University of Michigan, Ann Arbor, MI (United States); Department of Radiation Oncology, Providence Cancer Center, Novi, MI (United States)

2012-05-01T23:59:59.000Z

228

JILA Expansion: Preparing the Next Generation of Physicists  

Science Conference Proceedings (OSTI)

JILA Expansion: Preparing the Next Generation of Physicists (+$13 million). ... could lead to dramatically more efficient electrical power transmission. ...

2010-10-05T23:59:59.000Z

229

Data Assimilation with Gaussian Mixture Models Using the Dynamically Orthogonal Field Equations. Part II: Applications  

Science Conference Proceedings (OSTI)

The properties and capabilities of the Gaussian Mixture Model–Dynamically Orthogonal filter (GMM-DO) are assessed and exemplified by applications to two dynamical systems: 1) the double well diffusion and 2) sudden expansion flows; both of which ...

Thomas Sondergaard; Pierre F. J. Lermusiaux

2013-06-01T23:59:59.000Z

230

A test of Taylor- and modified Taylor-expansion  

E-Print Network (OSTI)

We compare Taylor expansion and a modified variant of Taylor expansion, which incorporates features of the fugacity series, for expansions in the chemical potential around a zero-density lattice field theory. As a first test we apply both series to the cases of free fermions and free bosons. Convergence and other properties are analyzed.

Max Wilfling; Christof Gattringer

2013-11-28T23:59:59.000Z

231

Improving effectiveness of query expansion using information theoretic approach  

Science Conference Proceedings (OSTI)

Automatic Query expansion is a well-known method to improve the performance of information retrieval systems. In this paper we have suggested information theoretic measures to improve efficiency of co-occurrence based automatic query expansion. We have ... Keywords: automatic query expansion, candidate terms, kullback-leibler divergence, relevance feedback, term cooccurrence

Hazra Imran; Aditi Sharan

2010-06-01T23:59:59.000Z

232

Convergence Characteristics of the Cumulant Expansion for Fourier Path Integrals  

E-Print Network (OSTI)

The cumulant representation of the Fourier path integral method is examined to determine the asymptotic convergence characteristics of the imaginary-time density matrix with respect to the number of path variables $N$ included. It is proved that when the cumulant expansion is truncated at order $p$, the asymptotic convergence rate of the density matrix behaves like $N^{-(2p+1)}$. The complex algebra associated with the proof is simplified by introducing a diagrammatic representation of the contributing terms along with an associated linked-cluster theorem. The cumulant terms at each order are expanded in a series such that the the asymptotic convergence rate is maintained without the need to calculate the full cumulant at order $p$. Using this truncated expansion of each cumulant at order $p$, the numerical cost in developing Fourier path integral expressions having convergence order $N^{-(2p+1)}$ is shown to be approximately linear in the number of required potential energy evaluations making the method promising for actual numerical implementation.

Sharif D. Kunikeev; David L. Freeman; J. D. Doll

2010-06-08T23:59:59.000Z

233

Good Timing: NIST/CU Collaboration Adds Timing Capability ...  

Science Conference Proceedings (OSTI)

... With the added capability to track the timing of dynamic biochemical reactions, cell ... to measure sensor signals at two points in time at a rate of up to ...

2012-02-07T23:59:59.000Z

234

Diamond Shamrock nears completion of major expansions  

SciTech Connect

With completion later this year of a second refined products line into Colorado, Diamond Shamrock Inc., San Antonio, will have added more than 600 miles of product and crude-oil pipeline on its system and expanded charge and production capacities at its two state-of-the-art refineries, all within 30 months. The projects aim at improving the company's ability to serve markets in the U.S. Southwest and increasing capacities and flexibility at its two refineries. The paper describes these projects under the following headings: new products service; another new line; and refineries, crude pipelines; Three Rivers expansion and Supplies for McKee.

True, W.R.

1993-05-24T23:59:59.000Z

235

The derivative expansion of the renormalization group  

E-Print Network (OSTI)

By writing the flow equations for the continuum Legendre effective action (a.k.a. Helmholtz free energy) with respect to a particular form of smooth cutoff, and performing a derivative expansion up to some maximum order, a set of differential equations are obtained which at FPs (Fixed Points) reduce to non-linear eigenvalue equations for the anomalous scaling dimension $\\eta$. Illustrating this by expanding (single component) scalar field theory, in two, three and four dimensions, up to second order in derivatives, we show that the method is a powerful and robust means of discovering and quantifying non-perturbative continuum limits (continuous phase transitions).

Tim R. Morris

1994-11-25T23:59:59.000Z

236

Optical Fiber Sensors For Monitoring Joint Articulation And Chest Expansion Of A Human Body  

DOE Patents (OSTI)

Fiber-optic sensors employing optical fibers of elastomeric material are incorporated in devices adapted to be worn by human beings in joint and chest regions for the purpose of monitoring and measuring the extent of joint articulation and chest expansion especially with respect to time.

Muhs, Jeffrey D. (Lenoir City, TN); Allison, Stephen W. (Knoxville, TN)

1997-12-23T23:59:59.000Z

237

Quantum Operation Time Reversal  

E-Print Network (OSTI)

The dynamics of an open quantum system can be described by a quantum operation, a linear, complete positive map of operators. Here, I exhibit a compact expression for the time reversal of a quantum operation, which is closely analogous to the time reversal of a classical Markov transition matrix. Since open quantum dynamics are stochastic, and not, in general, deterministic, the time reversal is not, in general, an inversion of the dynamics. Rather, the system relaxes towards equilibrium in both the forward and reverse time directions. The probability of a quantum trajectory and the conjugate, time reversed trajectory are related by the heat exchanged with the environment.

Crooks, Gavin E

2007-01-01T23:59:59.000Z

238

Quantum Operation Time Reversal  

E-Print Network (OSTI)

The dynamics of an open quantum system can be described by a quantum operation, a linear, complete positive map of operators. Here, I exhibit a compact expression for the time reversal of a quantum operation, which is closely analogous to the time reversal of a classical Markov transition matrix. Since open quantum dynamics are stochastic, and not, in general, deterministic, the time reversal is not, in general, an inversion of the dynamics. Rather, the system relaxes towards equilibrium in both the forward and reverse time directions. The probability of a quantum trajectory and the conjugate, time reversed trajectory are related by the heat exchanged with the environment.

Gavin E. Crooks

2007-06-26T23:59:59.000Z

239

Phase dynamics and particle production in preheating  

Science Conference Proceedings (OSTI)

We study a simple model of a massive inflaton field {phi} coupled to another scalar field {chi} with interaction term g{sup 2}{phi}{sup 2}{chi}{sup 2}. We use the theory developed by Kofman et al. [L. Kofman, A. D. Linde, and A. A. Starobinsky, Phys. Rev. D 56, 3258 (1997).] for the first stage of preheating to give a full description of the dynamics of the {chi} field modes, including the behavior of the phase, in terms of the iteration of a simple family of circle maps. The parameters of this family of maps are a function of time when expansion of the Universe is taken into account. With this more detailed description, we obtain a systematic study of the efficiency of particle production as a function of the inflaton field and coupling parameters, and we find that for g < or approx. 3x10{sup -4} the broad resonance ceases during the first stage of preheating.

Charters, T. [Departamento de Mecanica/Seccao de Matematica, Instituto Superior de Engenharia de Lisboa, Rua Conselheiro Emidio Navarro, 1, P-1949-014 Lisbon (Portugal) and Centro de Fisica Teorica e Computacional da Universidade de Lisboa, Avenida Professor Gama Pinto 2, P-1649-003 Lisbon (Portugal); Nunes, A.; Mimoso, J.P. [Departamento de Fisica, Faculdade de Ciencias da Universidade de Lisboa and Centro de Fisica Teorica e Computacional da Universidade de Lisboa, Avenida Professor Gama Pinto 2, P-1649-003 Lisbon (Portugal)

2005-04-15T23:59:59.000Z

240

Semantics, experience and time  

Science Conference Proceedings (OSTI)

The computational hypothesis, with its inherent representationalism, and the dynamical hypothesis, with its apparent absence of representations and its commitment to continuous time, stand at an impasse. It is unclear how the dynamical stance can handle ... Keywords: Computation, Experience, Invariance, Semantics, Situatedness, Time

Stephen E. Robbins

2002-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

The Nature and Origin of Time-asymmetric Spacetime Structures  

E-Print Network (OSTI)

Time-asymmetric spacetime structures, in particular those representing black holes and the expansion of the universe, are intimately related to other arrows of time, such as the second law and the retardation of radiation. The nature of the quantum arrow, often attributed to a collapse of the wave function, is essential, in particular, for understanding the much discussed "black hole information loss paradox". This paradox assumes a new form and can possibly be avoided in a consistent causal treatment that may be able to avoid horizons and singularities. The master arrow that would combine all arrows of time does not have to be identified with a direction of the formal time parameter that serves to formulate the dynamics as a succession of global states (a trajectory in configuration or Hilbert space). It may even change direction with respect to a fundamental physical clock such as the cosmic expansion parameter if this was formally extended either into a future contraction era or to negative "pre-big-bang" values.

H. D. Zeh

2010-12-21T23:59:59.000Z

242

Is Hubble's Expansion due to Dark Energy  

E-Print Network (OSTI)

{\\it The universe is expanding} is known (through Galaxy observations) since 1929 through Hubble's discovery ($V = H D$). Recently in 1999, it is found (through Supernovae observations) that the universe is not simply expanding but is accelerating too. We, however, hardly know only $4\\%$ of the universe. The Wilkinson Microwave Anisotropy Probe (WMAP) satellite observational data suggest $73\\%$ content of the universe in the form of dark-energy, $23\\%$ in the form of non-baryonic dark-matter and the rest $4\\%$ in the form of the usual baryonic matter. The acceleration of the universe is ascribed to this dark-energy with bizarre properties (repulsive-gravity). The question is that whether Hubble's expansion is just due to the shock of big-bang & inflation or it is due to the repulsive-gravity of dark-energy? Now, it is believed to be due to dark-energy, say, by re-introducing the once-discarded cosmological-constant $\\Lambda$. In the present paper, it is shown that `the formula for acceleration due to dark-energy' is (almost) exactly of same-form as `the acceleration formula from the Hubble's law'. Hence, it is concluded that: yes, `indeed it is the dark-energy responsible for the Hubble's expansion too, in-addition to the current on-going acceleration of the universe'.

R. C. Gupta; Anirudh Pradhan

2010-10-19T23:59:59.000Z

243

Modelling transient heat conduction in solids at multiple length and time scales: A coupled non-equilibrium molecular dynamics/continuum approach  

SciTech Connect

A method for controlling the thermal boundary conditions of non-equilibrium molecular dynamics simulations is presented. The method is simple to implement into a conventional molecular dynamics code and independent of the atomistic model employed. It works by regulating the temperature in a thermostatted boundary region by feedback control to achieve the desired temperature at the edge of an inner region where the true atomistic dynamics are retained. This is necessary to avoid intrinsic boundary effects in non-equilibrium molecular dynamics simulations. Three thermostats are investigated: the global deterministic Nose-Hoover thermostat and two local stochastic thermostats, Langevin and stadium damping. The latter thermostat is introduced to avoid the adverse reflection of phonons that occurs at an abrupt interface. The method is then extended to allow atomistic/continuum models to be thermally coupled concurrently for the analysis of large steady state and transient heat conduction problems. The effectiveness of the algorithm is demonstrated for the example of heat flow down a three-dimensional atomistic rod of uniform cross-section subjected to a variety of boundary conditions.

Jolley, Kenny [Department of Engineering, University of Leicester, University Road, Leicester LE1 7RH (United Kingdom); Gill, Simon P.A. [Department of Engineering, University of Leicester, University Road, Leicester LE1 7RH (United Kingdom)], E-mail: spg3@le.ac.uk

2009-10-20T23:59:59.000Z

244

Statement from Energy Secretary Samuel W. Bodman on the Expansion of the  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

the Expansion the Expansion of the Strategic Petroleum Reserve to 1.5 Billion Statement from Energy Secretary Samuel W. Bodman on the Expansion of the Strategic Petroleum Reserve to 1.5 Billion January 23, 2007 - 10:15am Addthis "Later today President Bush will announce his plan to double our nation's Strategic Petroleum Reserve to 1.5 billion barrels. I believe that expanding the Strategic Petroleum Reserve is a wise and prudent policy decision that will provide an additional layer of protection for our nation's energy security. "Originally established in 1975 in the aftermath of the Arab oil embargo, the Strategic Petroleum Reserve is a national asset that can be used in the case of severe supply disruption. During my tenure alone, we've used it a number of times, most notably in the aftermath of Hurricanes Katrina and

245

Early expansion in exploding multiple wire arrays  

Science Conference Proceedings (OSTI)

A simple model is developed for the initial stage (blow-off and the onset of pinching) of a multiple exploded wire array. With obvious modifications the model can also be applied to single wires or other self-pinched plasma columns. Each wire in the array is modeled as a plasma cylinder undergoing self-similar radial motion, and the whole array is coupled self-consistently to an external circuit. The plasma expands initially; the onset of self-pinch is shown to be coincident with the plasma conductivity reaching a value large enough for skin effect to occur. The model is run for a variety of system parameters, and the choice of machine and wire parameters to attain particular objectives (e.g., rapid current rise, limited wire expansion, etc.) is discussed.

Bloomberg, H.W.; Lampe, M.; Colombant, D.G.

1980-10-01T23:59:59.000Z

246

Derivative Expansion of the Exact Renormalization Group  

E-Print Network (OSTI)

The functional flow equations for the Legendre effective action, with respect to changes in a smooth cutoff, are approximated by a derivative expansion; no other approximation is made. This results in a set of coupled non-linear differential equations. The corresponding differential equations for a fixed point action have at most a countable number of solutions that are well defined for all values of the field. We apply the technique to the fixed points of one-component real scalar field theory in three dimensions. Only two non-singular solutions are found: the gaussian fixed point and an approximation to the Wilson fixed point. The latter is used to compute critical exponents, by carrying the approximation to second order. The results appear to converge rapidly.

Tim R. Morris

1994-03-22T23:59:59.000Z

247

Energy Infrastructure Events and Expansions Year-in-Review 2011 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Infrastructure Events and Expansions Year-in-Review 2011 Infrastructure Events and Expansions Year-in-Review 2011 Energy Infrastructure Events and Expansions Year-in-Review 2011 The 2011 Year-in-Review (YIR) provides a summary of significant energy disruptions and infrastructure changes that occurred in the United States throughout 2011. The focus is on the United States, but international events that impacted the United States are also reported. The 2011 YIR is based primarily on information reported in the Energy Assurance Daily (EAD) between January 1, 2011 and December 31, 2011. Energy Infrastructure Events and Expansions Year-in-Review 2011.pdf More Documents & Publications Year-in-Review: 2012 Energy Infrastructure Events and Expansions (July 2013) Energy Infrastructure Events and Expansions Year-in-Review 2010

248

Fast Address Lookups Using Controlled Prefix Expansion  

E-Print Network (OSTI)

-case insert/delete time of 2.5 msec., and an average insert/delete time of 4 usec. Expanded tries provide

Varghese, George

249

Thermal Expansion of Aluminum and Some Aluminum Alloys  

Science Conference Proceedings (OSTI)

... Am. Inst. Mining Met. Engrs., Inst. Metals Diy. 104, 308 (1933). 13] P. Hidnert and W. Souder, Thermal expansion of solids, NBS Circular 486 (1950). ...

2006-03-29T23:59:59.000Z

250

Prevention of Compressor Short Cycling in Direct-Expansion (DX...  

NLE Websites -- All DOE Office Websites (Extended Search)

Units, Part 1: Theoretical Analysis and Simulation Title Prevention of Compressor Short Cycling in Direct-Expansion (DX) Rooftop Units, Part 1: Theoretical Analysis and Simulation...

251

Prevention of Compressor Short Cycling in Direct-Expansion (DX...  

NLE Websites -- All DOE Office Websites (Extended Search)

Units- Part 2: Field Investigation Title Prevention of Compressor Short Cycling in Direct-Expansion (DX) Rooftop Units- Part 2: Field Investigation Publication Type Journal Article...

252

FOA aimed at growing expansive database of Renewable Energy and...  

Open Energy Info (EERE)

FOA aimed at growing expansive database of Renewable Energy and Energy Efficiency Incentives and Policies Home > Groups > Utility Rate Graham7781's picture Submitted by...

253

EA-1763: Geothermal Expansion to Boise State University, City...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Sites Power Marketing Administration Other Agencies You are here Home EA-1763: Geothermal Expansion to Boise State University, City of Boise, Boise, Idaho EA-1763: Geothermal...

254

Energy Recovery During Expansion of Compressed Gas Using Power...  

NLE Websites -- All DOE Office Websites (Extended Search)

Recovery During Expansion of Compressed Gas Using Power Plant Low-Quality Heat Sources Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is...

255

Oil Production Capacity Expansion Costs for the Persian Gulf  

U.S. Energy Information Administration (EIA)

DOE/EIA-TR/0606 Distribution Category UC-950 Oil Production Capacity Expansion Costs For The Persian Gulf January 1996 Energy Information Administration

256

Shearing expansion-free spherical anisotropic fluid evolution  

Science Conference Proceedings (OSTI)

Spherically symmetric expansion-free distributions are systematically studied. The entire set of field equations and junction conditions are presented for a general distribution of dissipative anisotropic fluid (principal stresses unequal), and the expansion-free condition is integrated. In order to understand the physical meaning of expansion-free motion, two different definitions for the radial velocity of a fluid element are discussed. It is shown that the appearance of a cavity is inevitable in the expansion-free evolution. The nondissipative case is considered in detail, and the Skripkin model is recovered.

Herrera, L. [Escuela de Fisica, Facultad de Ciencias, Universidad Central de Venezuela, Caracas (Venezuela, Bolivarian Republic of); Santos, N. O. [School of Mathematical Sciences, Queen Mary, University of London, London E1 4NS (United Kingdom); Laboratorio Nacional de Computacao Cientifica, 25651-070 Petropolis RJ (Brazil); Wang Anzhong [GCAP-CASPER, Department of Physics, Baylor University, Waco, Texas 76798-7316 (United States); Department of Theoretical Physics, State University of Rio de Janeiro, RJ (Brazil)

2008-10-15T23:59:59.000Z

257

Development of a New Controlled Thermal Expansion Superalloy ...  

Science Conference Proceedings (OSTI)

Aerospace Structural Metals Handbook, (1991) Vol 4, Code 4103, page 36. 9. D. F. Smith and J. S. Smith, “A Silicon-Containing, Low-Expansion Alloy with.

258

Expansion of the Volpentest Hazardous Materials Management and...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Assessment Expansion of the Volpentest Hazardous Materials Management and Emergency Response Training and Education Center, Hanford Site, Richland, Washington U.S....

259

PHOTOSPHERIC RADIUS EXPANSION IN SUPERBURST PRECURSORS FROM NEUTRON STARS  

Science Conference Proceedings (OSTI)

Thermonuclear runaway burning of carbon is in rare cases observed from accreting neutron stars as day-long X-ray flares called superbursts. In the few cases where the onset is observed, superbursts exhibit a short precursor burst at the start. In each instance, however, the data are of insufficient quality for spectral analysis of the precursor. Using data from the propane anti-coincidence detector of the Proportional Counter Array instrument on the Rossi X-ray Timing Explorer, we perform the first detailed time-resolved spectroscopy of precursors. For a superburst from 4U 1820-30 we demonstrate the presence of photospheric radius expansion. We find the precursor to be 1.4-2 times more energetic than other short bursts from this source, indicating that the burning of accreted helium is insufficient to explain the full precursor. Shock heating would be able to account for the shortfall in energy. We argue that this precursor is a strong indication that the superburst starts as a detonation, and that a shock induces the precursor. Furthermore, we employ our technique to study the superexpansion phase of the same superburst in greater detail.

Keek, L., E-mail: keek@nscl.msu.edu [National Superconducting Cyclotron Laboratory, Department of Physics and Astronomy, and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824 (United States)

2012-09-10T23:59:59.000Z

260

Non-solvolytic synthesis of aqueous soluble TiO2 nanoparticles and real-time dynamic measurements of the nanoparticle formation  

E-Print Network (OSTI)

of dried bare Dpa- and GalA-TiO2 NPs. Chen et al. Nanoscale Research Letters 2012, 7:297 Page 6 of 10 http://www.nanoscalereslett.com/content/7/1/297b)these NPs may have application in solar energy capture or sunscreens. Fourier transform infrared (FT... nucleation and a growth stage by a single normal UV–vis absorbance spectrum (I-?) or a single fixed-wavelength dynamic scan (I-t) because both the nucleation and growth are, in fact, concurrent and cannot be clearly separated ei- 0 40 80 120 160 200 240 280...

Chen, Lan; Rahme, Kamil; Holmes, Justin D; Morris, Michael A; Slater, Nigel KH

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Dynamic Simulation of a Helium Liquefier  

SciTech Connect

Dynamic behavior of a helium liquefier has been studied in detail with a Cryogenic Process REal-time SimulaTor (C-PREST) at the National Institute for Fusion Science (NIFS). The C-PREST is being developed to integrate large-scale helium cryogenic plant design, operation and maintenance for optimum process establishment. As a first step of simulations of cooldown to 4.5 K with the helium liquefier model is conducted, which provides a plant-process validation platform. The helium liquefier consists of seven heat exchangers, a liquid-nitrogen (LN2) precooler, two expansion turbines and a liquid-helium (LHe) reservoir. Process simulations are fulfilled with sequence programs, which were implemented with C-PREST based on an existing liquefier operation. The interactions of a JT valve, a JT-bypass valve and a reservoir-return valve have been dynamically simulated. The paper discusses various aspects of refrigeration process simulation, including its difficulties such as a balance between complexity of the adopted models and CPU time.

Maekawa, R.; Ooba, K.; Mito, T. [National Institute for Fusion Science, Toki, Gifu, 509-5292 (Japan); Nobutoki, M. [Nippon Sanso Co., Kawasaki, Kanagawa, 210-0861 (Japan)

2004-06-23T23:59:59.000Z

262

Environmental Assessment for the Terminal Expansion Project.  

SciTech Connect

The Terminal Expansion Project is proposed by Bonneville Power Administration (BPA), Southern California Edison (SCE), and the Los Angeles Department of Water and Power (LADWP) to increase the operating capacity of the existing bipole direct current (dc) Intertie line between the Celilo Converter Station at The Dalles, Oregon, and the Sylmar converter Station at Sylmar, California. The proposal will allow a greater exchange of electric power between the Pacific Northwest (PNW) and Southern California without constructing new interregional transmission lines. By adding more alternating ac/dc converter equipment at the terminals, the conductors on the existing 845-mile dc intertie transmission line can be operated at full design capacity. The dc Intertie plus two other ac lines which terminate near San Francisco comprise the ''Intertie.'' Though the project is interregional, relatively little construction will be needed. This Environmental Assessment addresses the environmental impacts of the proposed actions and makes a determination as to their significance. Though LADWP is complying with the State environmental process, as required by the California Environmental Quality Act (CEQA), the impacts of their construction are being considered as part of the impacts of the overall proposal and are considered in the determination of significance.

United States. Bonneville Power Administration.

1985-02-01T23:59:59.000Z

263

[Feedback control mechanisms of plant cell expansion  

DOE Green Energy (OSTI)

We have generated considerable evidence for the significance of wall stress relaxation in the control of plant growth and found that several agents (gibberellin, light, genetic loci for dwarf stature) influence growth rate via alteration of wall relaxation. We have refined our methods for measuring wall relaxation and, moreover, have found that wall relaxation properties bear only a distance relationship to wall mechanical properties. We have garnered novel insights into the nature of cell expansion mechanisms by analyzing spontaneous fluctuations of plant growth rate in seedlings. These experiments involved the application of mathematical techniques for analyzing growth rate fluctuations and the development of new instrumentation for measuring and forcing plant growth in a controlled fashion. These studies conclude that growth rate fluctuations generated by the plant as consequence of a feedback control system. This conclusion has important implications for the nature of wall loosening processes and demands a different framework for thinking about growth control. It also implies the existence of a growth rate sensor.

Cosgrove, D.J.

1992-01-01T23:59:59.000Z

264

Expansion of U. S. uranium enrichment capacity. Final environmental statement  

SciTech Connect

Reasonably foreseeable environmental, social, economic, and technological costs and benefits of postulated expansion of U. S. enrichment capacity through the year 2000 and reasonably available alternatives to such expansion are described. Both the gas centrifuge and gaseous diffusion methods for the enrichment of uranium are considered in this impact assessment. (JGB)

1976-04-01T23:59:59.000Z

265

Thermal Expansion in Ocean and Coupled General Circulation Models  

Science Conference Proceedings (OSTI)

More than half of the predicted rise in future sea level caused by the enhanced greenhouse effect is currently thought to be due to the thermal expansion of the oceans. Here methods for quantifying this thermal expansion component of sea level ...

D. R. Jackett; T. J. McDougall; M. H. England; A. C. Hirst

2000-04-01T23:59:59.000Z

266

Optimal expansion of competence sets with multilevel skills  

Science Conference Proceedings (OSTI)

The purpose of competence set expansion is to find an optimal expansion process at the minimal cost and then obtain the required competence set from the acquired competence set to solve a problem. Several models have been proposed to address the competence ... Keywords: Competence set, Decision making, Multiple solutions

Jung-Fa Tsai; Pei-Chun Wang; Ming-Hua Lin

2012-04-01T23:59:59.000Z

267

Expansion of elastic bodies with application in the bread industry  

Science Conference Proceedings (OSTI)

This article is concerned with modeling the expansion of an elastic body with application to the evolution of bread dough during the proofing process. The main result is a set of linear second-order partial differential equations corresponding to an ... Keywords: B-Splines, Bread dough, Elastic expansion, Rayleigh-Ritz method, Surface evolution

P. C. Bollada

2008-10-01T23:59:59.000Z

268

Reliabilit PlanningReliability Planning David Duebner, Expansion Planningp g  

E-Print Network (OSTI)

EE552 Reliabilit PlanningReliability Planning David Duebner, Expansion Planningp g September 27, 2010 #12;Reliability Planning OverviewReliability Planning Overview · Midwest ISO Transmission Expansion Plan (MTEP)p ( ) · MTEP Reliability Study Process ­ Planning Criteriag ­ Reliability Analysis

McCalley, James D.

269

Zambia-Long-Term Generation Expansion Study | Open Energy Information  

Open Energy Info (EERE)

Zambia-Long-Term Generation Expansion Study Zambia-Long-Term Generation Expansion Study Jump to: navigation, search Logo: Zambia-Long-Term Generation Expansion Study Name Zambia-Long-Term Generation Expansion Study Agency/Company /Organization Argonne National Laboratory Sector Energy Topics Implementation, GHG inventory, Background analysis Resource Type Software/modeling tools, Lessons learned/best practices Website http://www.dis.anl.gov/pubs/61 Country Zambia UN Region Eastern Africa References Zambia-Long-Term Generation Expansion Study[1] Abstract The objective of this study is to analyze possible long-term development options of the Zambian electric power system in the period up to 2015. Overview "The objective of this study is to analyze possible long-term development options of the Zambian electric power system in the period up to 2015. The

270

Tanzania Energy Development and Access Expansion Project | Open Energy  

Open Energy Info (EERE)

Energy Development and Access Expansion Project Energy Development and Access Expansion Project Jump to: navigation, search Name of project Tanzania Energy Development and Access Expansion Project Location of project Tanzania Energy Services Lighting, Cooking and water heating, Space heating, Cooling Year initiated 2007 Organization World Bank Website http://documents.worldbank.org Coordinates -6.369028°, 34.888822° References The World Bank[1] The objective of the Energy Development and Access Expansion Project of Tanzania is to improve the quality and efficiency of the electricity service provision in the three main growth centers of Dar es Salaam, Arusha, and Kilimanjaro and to establish a sustainable basis for energy access expansion. The project is consistent with the latest Joint Assistance Strategy (2007-2010) by specifically supporting the goals of the

271

Energy Infrastructure Events and Expansions Year-in-Review 2010 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Infrastructure Events and Expansions Year-in-Review 2010 Infrastructure Events and Expansions Year-in-Review 2010 Energy Infrastructure Events and Expansions Year-in-Review 2010 The Year-in-Review provides an overview of the events that occurred in 2010: disruptions and additions to energy infrastructure in the United States as well as international events of importance to U.S. energy supplies. The report is the culminating analysis of all of the 2010 issues of the Energy Assurance Daily (EAD). Energy Infrastructure Events and Expansions Year-in-Review 2010.pdf More Documents & Publications Energy Infrastructure Events and Expansions Year-in-Review 2011 Hardening and Resiliency: U.S. Energy Industry Response to Recent Hurricane Seasons - August 2010 Comparing the Impacts of the 2005 and 2008 Hurricanes on U.S. Energy

272

Updated Volumetric Expansion Factors for K Basin Sludge During Storage  

SciTech Connect

Sludge has accumulated in the K East (KE) and K West (KW) Basins at the Hanford Site. This sludge contains metallic uranium and uranium oxides that will corrode, hydrate, and generate and consume gases during containerized storage. From these corrosion reactions, two sludge expansion mechanisms can be expected: 1) expansion of the volume of the sludge solids from the generation of corrosion oxidation products that occupy more space than the starting-state sludge; and 2) expansion of the bulk sludge volume from the retention of hydrogen gas bubbles. This report provides a review and updated projections of the volumetric expansion occurring due to corrosion and gas retention during the containerized storage of K Basin sludge. New design and safety basis volume expansion values are provided for the following sludge streams: KW Floor, KW North Loadout Pit, KW canister, and fuel piece sludge.

Schmidt, Andrew J. (BATTELLE (PACIFIC NW LAB)); Delegard, Calvin H. (BATTELLE (PACIFIC NW LAB))

2003-03-14T23:59:59.000Z

273

Acceleration of the cosmic expansion induced by symmetry breaking  

E-Print Network (OSTI)

It is proved that in order to obtain a model of the accelerated cosmic expansion the thing one only need to do is to add a perturbation term to the Einstein-Hilbert Lagrangian. This term leads to some symmetry breaking terms in the fields equation, which makes the cosmic expansion accelerating. A vacuum de Sitter solution is obtained. A new explanation of the acceleration of the cosmic expansion is presented. In this model the changing of the expansion from decelerating to accelerating is an intrinsic property of the universe without need of an exotic dark energy. The acceleration of the cosmic expansion is induced by the symmetry breaking perturbation of the gravitational energy. The cosmological constant problem, the coincidence problem and the problem of phantom divide line crossing are naturally solved. The results of the model are roughly consistent with the observations.

G. Y. Chee

2013-01-21T23:59:59.000Z

274

OPEC production: Untapped reserves, world demand spur production expansion  

Science Conference Proceedings (OSTI)

To meet projected world oil demand, almost all members of the Organization of Petroleum Exporting Countries (OPEC) have embarked on ambitious capacity expansion programs aimed at increasing oil production capabilities. These expansion programs are in both new and existing oil fields. In the latter case, the aim is either to maintain production or reduce the production decline rate. However, the recent price deterioration has led some major OPEC producers, such as Saudi Arabia and Iran, to revise downward their capacity plans. Capital required for capacity expansion is considerable. Therefore, because the primary source of funds will come from within each OPEC country, a reasonably stable and relatively high oil price is required to obtain enough revenue for investing in upstream projects. This first in a series of two articles discusses the present OPEC capacity and planned expansion in the Middle East. The concluding part will cover the expansion plans in the remaining OPEC countries, capital requirements, and environmental concerns.

Ismail, I.A.H. (Organization of the Petroleum Exporting Countries, Vienna (Austria))

1994-05-02T23:59:59.000Z

275

A Framework of Concurrent Task Scheduling and Dynamic Voltage and Frequency Scaling in Real-Time Embedded Systems with Energy Harvesting  

E-Print Network (OSTI)

harvesting module is comprised of a Photovoltaic (PV) panel for harvesting energy and a supercapacitor panel, state-of- charge management for the supercapacitor, and energy-harvesting- aware real-time task-leakage of the supercapacitor, and power losses in voltage converters, employs a cascaded feedback control structure

Pedram, Massoud

276

Time efficient heuristics for cell-to-switch assignment in quasi-static/dynamic location area planning of mobile cellular networks  

Science Conference Proceedings (OSTI)

This paper presents a set of time efficient, sub-optimal heuristics to solve the problem of assigning cells to mobile switching centers (or, switches in short) for an effective location area (LA) planning in a mobile cellular network (MCN). A common ... Keywords: CSA, Cellular networks, Clustering and heuristics, Handoff, Hybrid cost, Load balancing, Location area partitioning, Mobile communication, Optimization

Debashis Saha; Partha S. Bhattacharjee; Amitava Mukherjee

2007-01-01T23:59:59.000Z

277

Dynamic Scaling of Manipulator Trajectories  

E-Print Network (OSTI)

A fundamental time-scaling property of manipulator dynamics has been identified that allows modification of movement speed without complete dynamics recalculation. By exploiting this property, it can be determined ...

Hollerbach, John M.

1983-01-01T23:59:59.000Z

278

AVESTAR® - Dynamic Modeling  

NLE Websites -- All DOE Office Websites (Extended Search)

Dynamic Modeling Dynamic Modeling The AVESTAR team is pursuing research on the dynamic modeling and simulation of advanced energy systems ranging from power plants to power grids. Dynamic models provide a continuous view of energy systems in action by calculating their transient behavior over time. Plant-wide Models For power plants, dynamic models are used to analyze a wide variety of operating scenarios, including normal base load operation, startup, shutdown, feedstock switchovers, cycling, and load-following. Dynamic process and control models are also essential for analyzing plant responses to setpoint changes and disturbances, as well as malfunctions and abnormal situations. Other applications of plant-wide dynamic models include controllability and operational flexibility analyses, environmental studies, safety evaluations, and risk mitigation.

279

Measurement and quantification of aggregate thermal coefficient of expansion  

E-Print Network (OSTI)

The coefficient of thermal expansion of concrete affects thermal related distresses in pavements. Factors affecting expansion of concrete and aggregates along with existing models are reviewed. A test method to measure the coefficient of thermal expansion of aggregates is proposed. Existing methods used to analyze oxide contents are evaluated. A relation between the oxide content of various elements in aggregates and the CTE of aggregate is presented. Results obtained from the proposed method are presented. A model is also presented for the CTE of concrete based on aggregate properties.

Chande, Gautam U

1997-01-01T23:59:59.000Z

280

IMPACT OF SUPERNOVA DYNAMICS ON THE {nu}p-PROCESS  

Science Conference Proceedings (OSTI)

We study the impact of the late-time dynamical evolution of ejecta from core-collapse supernovae on {nu}p-process nucleosynthesis. Our results are based on hydrodynamical simulations of neutrino-driven wind ejecta. Motivated by recent two-dimensional wind simulations, we vary the dynamical evolution during the {nu}p-process and show that final abundances strongly depend on the temperature evolution. When the expansion is very fast, there is not enough time for antineutrino absorption on protons to produce enough neutrons to overcome the {beta}{sup +}-decay waiting points and no heavy elements beyond A = 64 are produced. The wind termination shock or reverse shock dramatically reduces the expansion speed of the ejecta. This extends the period during which matter remains at relatively high temperatures and is exposed to high neutrino fluxes, thus allowing for further (p, {gamma}) and (n, p) reactions to occur and to synthesize elements beyond iron. We find that the {nu}p-process starts to efficiently produce heavy elements only when the temperature drops below {approx}3 GK. At higher temperatures, due to the low alpha separation energy of {sup 60}Zn (S{sub {alpha}} = 2.7 MeV) the reaction {sup 59}Cu(p, {alpha}){sup 56}Ni is faster than the reaction {sup 59}Cu(p, {gamma}){sup 60}Zn. This results in the closed NiCu cycle that we identify and discuss here for the first time. We also investigate the late phase of the {nu}p-process when the temperatures become too low to maintain proton captures. Depending on the late neutron density, the evolution to stability is dominated by {beta}{sup +} decays or by (n, {gamma}) reactions. In the latter case, the matter flow can even reach the neutron-rich side of stability and the isotopic composition of a given element is then dominated by neutron-rich isotopes.

Arcones, A. [Department of Physics, University of Basel, CH-4056 Basel (Switzerland); Froehlich, C. [Department of Physics, North Carolina State University, Raleigh, NC 27695 (United States); Martinez-Pinedo, G., E-mail: a.arcones@unibas.ch, E-mail: cfrohli@ncsu.edu [Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany)

2012-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Dynamics of Propane in Silica Mesopores Formed upon PropyleneHydrogenation over Pt Nanoparticles by Time-Resolved FT-IRSpectroscopy  

DOE Green Energy (OSTI)

Propylene hydrogenation over Pt nanoparticles supported onmesoporous silica type SBA-15 was monitored by time-resolved FT-IRspectroscopy at 23 ms resolution using short propylene gas pulses thatjoined a continuous flow of hydrogen in N2 (1 atm total pressure).Experiments were conducted in the temperature range 323-413 K. Propanewas formed within 100 milliseconds or faster. The CH stretching regionrevealed distinct bands for propane molecules emerging inside thenanoscale channels of the silica support. Spectral analysis gave thedistribution of the propane product between support and surrounding gasphase as function of time. Kinetic analysis showed that the escape ofpropane molecules from the channels occurred within hundreds ofmilliseconds (3.1 + 0.4 s-1 at 383 K). A steady state distribution ofpropane between gas phase and mesoporous support is established as theproduct is swept from the catalyst zone by the continuous flow ofhydrogen co-reactant. This is the first direct spectroscopic observationof emerging products of heterogeneous catalysis on nanoporous supportsunder reaction conditions.

Waslylenko, Walter; Frei, Heinz

2007-01-31T23:59:59.000Z

282

DOE Announces Expansion and Solicitation for Entrepreneur in Residence  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Expansion and Solicitation for Entrepreneur in Expansion and Solicitation for Entrepreneur in Residence Program DOE Announces Expansion and Solicitation for Entrepreneur in Residence Program November 19, 2008 - 4:58pm Addthis Entrepreneurs Accelerate Deployment of Advanced Clean Energy Technologies from DOE's Labs to the Marketplace WASHINGTON - U.S. Department of Energy (DOE) Secretary Samuel W. Bodman today announced a competitive solicitation for five venture capital firms to participate in the expansion of DOE's Entrepreneur in Residence (EIR) program, that aims to accelerate deployment and commercialization of advanced clean energy technologies from DOE's National Laboratories. EIR furthers President Bush's comprehensive strategy to reduce our nation's dependence on foreign oil and reduce greenhouse gas emissions by empowering

283

Energy At Work: Plant Expansion Creates Job Opportunities in Ohio |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy At Work: Plant Expansion Creates Job Opportunities in Ohio Energy At Work: Plant Expansion Creates Job Opportunities in Ohio Energy At Work: Plant Expansion Creates Job Opportunities in Ohio May 24, 2012 - 5:08pm Addthis Wade Reichelderfer is among the recent hires at DuPont's newly expanded solar manufacturing plant in Circleville, Ohio. | Photo courtesy of DuPont. Wade Reichelderfer is among the recent hires at DuPont's newly expanded solar manufacturing plant in Circleville, Ohio. | Photo courtesy of DuPont. Erin R. Pierce Erin R. Pierce Digital Communications Specialist, Office of Public Affairs What does this project do? DuPont's newly expanded solar manufacturing plant in Circleville, Ohio, produces thin film materials to strengthen the durability of solar panels. To support the expansion project, DuPont created 70 new operational

284

Partnership in Assisting Community Expansion (PACE) Program (North Dakota)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Partnership in Assisting Community Expansion (PACE) Program (North Partnership in Assisting Community Expansion (PACE) Program (North Dakota) Partnership in Assisting Community Expansion (PACE) Program (North Dakota) < Back Eligibility Commercial Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State North Dakota Program Type Loan Program The Partnership in Assisting Community Expansion (PACE) Program is available to finance the purchase of equipment or real estate, as well as term working capital. In conjunction with community support, the program provides an interest buy down that can reduce the borrower's rate of interest by as much as 5%. This buy down can mean an interest savings of approximately $462,000 over the term of the loan. In return, the borrower

285

Financial Analysis of Electric Sector Expansion Plans (FINPLAN) | Open  

Open Energy Info (EERE)

Financial Analysis of Electric Sector Expansion Plans (FINPLAN) Financial Analysis of Electric Sector Expansion Plans (FINPLAN) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Financial Analysis of Electric Sector Expansion Plans (FINPLAN) Agency/Company /Organization: International Atomic Energy Agency Sector: Energy Focus Area: Renewable Energy, Energy Efficiency Topics: Market analysis Resource Type: Software/modeling tools Website: www-tc.iaea.org/tcweb/abouttc/strategy/Thematic/pdf/presentations/ener References: Overview of IAEA PESS Models [1] "In developing countries, financial constraints are often the most important obstacle to implementing optimal electricity expansion plans. FINPLAN helps assess the financial viability of plans and projects. It takes into account different financial sources - including export credits,

286

Frequency dependent thermal expansion in binary viscoelastic composites  

E-Print Network (OSTI)

coe?cient, c p is the heat capacity, T is the ambient systemthermal expansion and heat capacity e?ects, also has thisincrement of heat, c v is heat capacity at constant volume,

Berryman, James G.

2008-01-01T23:59:59.000Z

287

Stetson Wind Expansion Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Stetson Wind Expansion Wind Farm Stetson Wind Expansion Wind Farm Jump to: navigation, search Name Stetson Wind Expansion Wind Farm Facility Stetson Wind Expansion Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner First Wind Developer First Wind Location Washington County ME Coordinates 45.595833°, -67.928628° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.595833,"lon":-67.928628,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

288

Energy At Work: Plant Expansion Creates Job Opportunities in Ohio |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy At Work: Plant Expansion Creates Job Opportunities in Ohio Energy At Work: Plant Expansion Creates Job Opportunities in Ohio Energy At Work: Plant Expansion Creates Job Opportunities in Ohio May 24, 2012 - 5:08pm Addthis Wade Reichelderfer is among the recent hires at DuPont's newly expanded solar manufacturing plant in Circleville, Ohio. | Photo courtesy of DuPont. Wade Reichelderfer is among the recent hires at DuPont's newly expanded solar manufacturing plant in Circleville, Ohio. | Photo courtesy of DuPont. Erin R. Pierce Erin R. Pierce Digital Communications Specialist, Office of Public Affairs What does this project do? DuPont's newly expanded solar manufacturing plant in Circleville, Ohio, produces thin film materials to strengthen the durability of solar panels. To support the expansion project, DuPont created 70 new operational

289

Year-in-Review: 2012 Energy Infrastructure Events and Expansions  

Energy.gov (U.S. Department of Energy (DOE))

The Year-in-Review (YIR): 2012 Energy Infrastructure Events and Expansions report provides a summary of significant energy disruptions and infrastructure changes that occurred in the United States...

290

Generation and transmission expansion planning for renewable energy integration  

SciTech Connect

In recent years the expansion planning problem has become increasingly complex. As expansion planning (sometimes called composite or integrated resource planning) is a non-linear and non-convex optimization problem, researchers have traditionally focused on approximate models of power flows to solve the problem. The problem has also been split into generation expansion planning (GEP) and transmission network expansion planning (TNEP) to improve computational tractability. Until recently these approximations have produced results that are straight-forward to combine and adapt to the more complex and complete problem. However, the power grid is evolving towards a state where the adaptations are no longer easy (e.g. large amounts of limited control, renewable generation, comparable generation and transmission construction costs) and necessitates new approaches. Recent work on deterministic Discrepancy Bounded Local Search (DBLS) has shown it to be quite effective in addressing the TNEP. In this paper, we propose a generalization of DBLS to handle simultaneous generation and transmission planning.

Bent, Russell W [Los Alamos National Laboratory; Berscheid, Alan [Los Alamos National Laboratory; Toole, G. Loren [Los Alamos National Laboratory

2010-11-30T23:59:59.000Z

291

Transitions in Shallow Convection: An Explanation for Lateral Cell Expansion  

Science Conference Proceedings (OSTI)

A generalized seven-coefficient model of two-dimensional Rayleigh-Bénard convection is presented. The model simulates successfully one means by which lateral cell expansion can occur as the value of the imposed vertical temperature difference is ...

Hai-Ru Chang; Hampton N. Shirer

1984-08-01T23:59:59.000Z

292

On Thermal Expansion over the Last Hundred Years  

Science Conference Proceedings (OSTI)

Estimates of sea level rise during the period 1856–1991 due to thermal expansion are presented. The estimates are based on an ocean model that consists of three zonally averaged ocean basins representing the Atlantic, Pacific, and Indian Oceans. ...

J. R. de Wolde; R. Bintanja; J. Oerlemans

1995-11-01T23:59:59.000Z

293

Filtering with Marked Point Process Observations via Poisson Chaos Expansion  

SciTech Connect

We study a general filtering problem with marked point process observations. The motivation comes from modeling financial ultra-high frequency data. First, we rigorously derive the unnormalized filtering equation with marked point process observations under mild assumptions, especially relaxing the bounded condition of stochastic intensity. Then, we derive the Poisson chaos expansion for the unnormalized filter. Based on the chaos expansion, we establish the uniqueness of solutions of the unnormalized filtering equation. Moreover, we derive the Poisson chaos expansion for the unnormalized filter density under additional conditions. To explore the computational advantage, we further construct a new consistent recursive numerical scheme based on the truncation of the chaos density expansion for a simple case. The new algorithm divides the computations into those containing solely system coefficients and those including the observations, and assign the former off-line.

Sun Wei, E-mail: wsun@mathstat.concordia.ca [Concordia University, Department of Mathematics and Statistics (Canada); Zeng Yong, E-mail: zengy@umkc.edu [University of Missouri at Kansas City, Department of Mathematics and Statistics (United States); Zhang Shu, E-mail: zhangshuisme@hotmail.com [Concordia University, Department of Mathematics and Statistics (Canada)

2013-06-15T23:59:59.000Z

294

Optimal generation expansion planning via the cross-entropy method  

Science Conference Proceedings (OSTI)

The Generation Expansion Planning (GEP) problem is a highly constrained, large-scale, mixed integer nonlinear programming problem. The objective of the GEP problem is to evaluate the least cost investment plan for addition of power generating units over ...

Rishabh P. Kothari; Dirk P. Kroese

2009-12-01T23:59:59.000Z

295

Value of Options in Airport Expansion - Example of AICM  

E-Print Network (OSTI)

Investments decisions for airport capacity expansion are usually taken, either when demand exceeds the current capacity and the airport is working under congestion, or when current demand is expected to overcome current ...

Morgado, Frederico

296

Elastic capsules in shear flow: Analytical solutions for constant and time-dependent shear rates  

E-Print Network (OSTI)

We investigate the dynamics of microcapsules in linear shear flow within a reduced model with two degrees of freedom. In previous work for steady shear flow, the dynamic phases of this model, i.e. swinging, tumbling and intermittent behaviour, have been identified using numerical methods. In this paper, we integrate the equations of motion in the quasi-spherical limit analytically for time-constant and time-dependent shear flow using matched asymptotic expansions. Using this method, we find analytical expressions for the mean tumbling rate in general time-dependent shear flow. The capsule dynamics is studied in more detail when the inverse shear rate is harmonically modulated around a constant mean value for which a dynamic phase diagram is constructed. By a judicious choice of both modulation frequency and phase, tumbling motion can be induced even if the mean shear rate corresponds to the swinging regime. We derive expressions for the amplitude and width of the resonance peaks as a function of the modulation frequency.

Steffen Kessler; Reimar Finken; Udo Seifert

2009-02-26T23:59:59.000Z

297

Thermal expansion within a chain of magnetic colloidal particles  

E-Print Network (OSTI)

We study the thermal expansion of chains formed by self-assembly of magnetic colloidal particles in a magnetic field. Using video-microscopy, complete positional data of all the particles of the chains is obtained. By changing the ionic strength of the solution and the applied magnetic field, the interaction potential can be tuned. We analyze the thermal expansion of the chain using a simple model of a one dimensional anharmonic crystal of finite size.

D. Lacoste; C. Brangbour; J. Bibette; J. Baudry

2009-06-19T23:59:59.000Z

298

RECOVERY ACT: DYNAMIC ENERGY CONSUMPTION MANAGEMENT OF ROUTING TELECOM AND DATA CENTERS THROUGH REAL-TIME OPTIMAL CONTROL (RTOC): Final Scientific/Technical Report  

Science Conference Proceedings (OSTI)

This final scientific report documents the Industrial Technology Program (ITP) Stage 2 Concept Development effort on Data Center Energy Reduction and Management Through Real-Time Optimal Control (RTOC). Society is becoming increasingly dependent on information technology systems, driving exponential growth in demand for data center processing and an insatiable appetite for energy. David Raths noted, 'A 50,000-square-foot data center uses approximately 4 megawatts of power, or the equivalent of 57 barrels of oil a day1.' The problem has become so severe that in some cases, users are giving up raw performance for a better balance between performance and energy efficiency. Historically, power systems for data centers were crudely sized to meet maximum demand. Since many servers operate at 60%-90% of maximum power while only utilizing an average of 5% to 15% of their capability, there are huge inefficiencies in the consumption and delivery of power in these data centers. The goal of the 'Recovery Act: Decreasing Data Center Energy Use through Network and Infrastructure Control' is to develop a state of the art approach for autonomously and intelligently reducing and managing data center power through real-time optimal control. Advances in microelectronics and software are enabling the opportunity to realize significant data center power savings through the implementation of autonomous power management control algorithms. The first step to realizing these savings was addressed in this study through the successful creation of a flexible and scalable mathematical model (equation) for data center behavior and the formulation of an acceptable low technical risk market introduction strategy leveraging commercial hardware and software familiar to the data center market. Follow-on Stage 3 Concept Development efforts include predictive modeling and simulation of algorithm performance, prototype demonstrations with representative data center equipment to verify requisite performance and continued commercial partnering agreement formation to ensure uninterrupted development, and deployment of the real-time optimal control algorithm. As a software implementable technique for reducing power consumption, the RTOC has two very desirable traits supporting rapid prototyping and ultimately widespread dissemination. First, very little capital is required for implementation. No major infrastructure modifications are required and there is no need to purchase expensive capital equipment. Second, the RTOC can be rolled out incrementally. Therefore, the effectiveness can be proven without a large scale initial roll out. Through the use of the Impact Projections Model provided by the DOE, monetary savings in excess of $100M in 2020 and billions by 2040 are predicted. In terms of energy savings, the model predicts a primary energy displacement of 260 trillion BTUs (33 trillion kWh), or a 50% reduction in server power consumption. The model also predicts a corresponding reduction of pollutants such as SO2 and NOx in excess of 100,000 metric tonnes assuming the RTOC is fully deployed. While additional development and prototyping is required to validate these predictions, the relative low cost and ease of implementation compared to large capital projects makes it an ideal candidate for further investigation.

Ron Moon

2011-06-30T23:59:59.000Z

299

Stochastic Equilibrium Models for Generation Capacity Expansion  

E-Print Network (OSTI)

in household and tertiary and hence reduction of demand. The second reason is that the increasing interest for de- mand side management and the development of new technologies of the smart grid type will progressively introduce a true price response... , for the integrability property). This variant of the equilibrium model can be stated as follows. Let D(?) = (d(`, ?), ` ? L) and P (?) = (p(`, ?), ` ? L) denote the vectors of demand and price in the different time segments. Smart grid technologies aim, among other...

Ehrenmann, Andreas; Smeers, Yves

300

Data Assimilation with Gaussian Mixture Models using the Dynamically Orthogonal Field Equations. Part II. Applications  

E-Print Network (OSTI)

The properties and capabilities of the GMM-DO filter are assessed and exemplified by applications to two dynamical systems: (1) the Double Well Diffusion and (2) Sudden Expansion flows; both of which admit far-from-Gaussian ...

Sondergaard, Thomas

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Accuracy of truncated Leiden and Berlin virial expansions for pure gases and sealing joints between silicon carbide and stainless steel  

E-Print Network (OSTI)

Pure gases such as methane, carbon dioxide and steam were used to make comparisons between Leiden and Berlin virial expansions for the calculation of the compressibility factor, fugacity coefficient and enthalpy residual. Results show that the Leiden expansion is better than the Berlin expansion with truncation after the second virial coefficient for both expansions, and also with truncation after the third virial coefficient for both expansions. Also, joining techniques to join silicon carbide to steel were studied. Brazing is the technique more used, and several active filler metals such as Ag-Cu-In-Ti, Ag-Cu-Ti, plus carbon fibers Ag-Cu-Hf and Niobium were used. This review shows that the strength of the joint is affected by the amount of active filler metal in the alloy, heating element and atmosphere, composition and surface of SiC, thickness of the joint, and time. In general, brazing temperature is limited by the melting point of the filler metals, which is generally below 1000 ?C. An alternative to overcome this problem in brazing is using a functionally graded material (FGM) that is formed with the native elements. This FGM has one end of almost 100% stainless steel, which is joined using very well known processes of joining metals. The other end of the FGM, which is almost 100% SiC, is joined using a reaction-forming method that produces an interlayer of SiC plus Si and supports temperatures as high as 1350 ?C.

Santana Rodriguez, Gabriel Enrique

2003-01-01T23:59:59.000Z

302

Introduction to Accelerated Molecular Dynamics  

SciTech Connect

Molecular Dynamics is the numerical solution of the equations of motion of a set of atoms, given an interatomic potential V and some boundary and initial conditions. Molecular Dynamics is the largest scale model that gives unbiased dynamics [x(t),p(t)] in full atomistic detail. Molecular Dynamics: is simple; is 'exact' for classical dynamics (with respect to a given V); can be used to compute any (atomistic) thermodynamical or dynamical properties; naturally handles complexity -- the system does the right thing at the right time. The physics derives only from the interatomic potential.

Perez, Danny [Los Alamos National Laboratory

2012-07-10T23:59:59.000Z

303

Introduction to Accelerated Molecular Dynamics  

SciTech Connect

Molecular Dynamics is the numerical solution of the equations of motion of a set of atoms, given an interatomic potential V and some boundary and initial conditions. Molecular Dynamics is the largest scale model that gives unbiased dynamics [x(t),p(t)] in full atomistic detail. Molecular Dynamics: is simple; is 'exact' for classical dynamics (with respect to a given V); can be used to compute any (atomistic) thermodynamical or dynamical properties; naturally handles complexity -- the system does the right thing at the right time. The physics derives only from the interatomic potential.

Perez, Danny [Los Alamos National Laboratory

2012-07-10T23:59:59.000Z

304

Oil Production Capacity Expansion Costs for the Persian Gulf  

Gasoline and Diesel Fuel Update (EIA)

TR/0606 TR/0606 Distribution Category UC-950 Oil Production Capacity Expansion Costs For The Persian Gulf January 1996 Energy Information Administration Office of Oil and Gas U.S. Department of Energy Washington, DC 20585 This report was prepared by the Energy Information Administration, the independent statistical and analytical agency within the Department of Energy. The information contained herein should not be construed as advocating or reflecting any policy position of the Department of Energy or any other organization. Energy Information Administration Oil Production Capacity Expansion Costs for the Persian Gulf iii Preface Oil Production Capacity Expansion Costs for the Persian Gulf provides estimates of development and operating costs for various size fields in countries surrounding the Persian

305

Expansion of the U.S. Natural Gas Pipeline Network:  

Gasoline and Diesel Fuel Update (EIA)

Expansion of the U.S. Natural Gas Pipeline Network: Expansion of the U.S. Natural Gas Pipeline Network: Additions in 2008 and Projects through 2011 This report examines new natural gas pipeline capacity added to the U.S. natural gas pipeline system during 2008. In addition, it discusses and analyzes proposed natural gas pipeline projects that may be developed between 2009 and 2011, and the market factors supporting these initiatives. Questions or comments on this article should be directed to Damien Gaul at damien.gaul@eia.doe.gov or (202) 586-2073. Robust construction of natural gas infrastructure in 2008 resulted in the completion of 84 pipeline projects in the lower 48 States, adding close to 4,000 miles of natural gas pipeline. These completions of new natural gas pipelines and expansions of existing pipelines in the United States

306

Motiva Enterprises Refinery Expansion Groundbreaking | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Enterprises Refinery Expansion Groundbreaking Enterprises Refinery Expansion Groundbreaking Motiva Enterprises Refinery Expansion Groundbreaking December 10, 2007 - 4:44pm Addthis Remarks as Prepared for Secretary Bodman Thank you, Bill. It's good to see Congressman Poe, Rob Routs, Mr. Al-Khayyal and Mayor Prince here. Thank you all for inviting me to be part of this occasion. In 1901 Texas wildcatters struck oil near here at a place called Spindletop, setting off the Texas Oil Boom. Like the California Gold Rush some 50 years before, the Texas Oil Boom helped to build America. People moved across the country in search of prosperity. To achieve it, they needed to develop new technologies and build new infrastructure like the original parts of the Port Arthur refinery, which opened here in 1903. As America's need for energy expanded as our demand for oil and gas

307

EIS-0488: Cameron Pipeline Expansion Project and Cameron LNG Liquefaction  

NLE Websites -- All DOE Office Websites (Extended Search)

88: Cameron Pipeline Expansion Project and Cameron LNG 88: Cameron Pipeline Expansion Project and Cameron LNG Liquefaction Project, Cameron Parish, LA EIS-0488: Cameron Pipeline Expansion Project and Cameron LNG Liquefaction Project, Cameron Parish, LA SUMMARY Federal Energy Regulatory Commission (FERC) is preparing an EIS, with DOE as a cooperating agency, to analyze the potential environmental impacts of a proposal to expand the existing Cameron Pipeline by 21 miles (from Calcasieu to Beauregard Parishes, Louisiana, with modifications in Cameron Parish), and expand an existing liquefied natural gas (LNG) import terminal in Cameron Parish, Louisiana, to enable the terminal to liquefy and export the LNG. PUBLIC COMMENT OPPORTUNITIES Comment Period Ends: 03/03/14 DOCUMENTS AVAILABLE FOR DOWNLOAD January 10, 2014

308

Heat Flow Database Expansion for NGDS Data Development, Collection and  

Open Energy Info (EERE)

Database Expansion for NGDS Data Development, Collection and Database Expansion for NGDS Data Development, Collection and Maintenance Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Heat Flow Database Expansion for NGDS Data Development, Collection and Maintenance Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Geothermal Data Development, Collection, and Maintenance Project Description In particular the efforts on document and core digitization, the recovery of the BEG geopressure data developed during the approximately $200 million project by DOE in the 1970-1980, the EGS data from the Fenton Hill experiments, and meta-data associated with US thermal mapping are crucial to be performed at this point because they are otherwise in danger of deterioration or complete loss.

309

Mirror Film Company Has 'Concentrated' Plans for Expansion | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Mirror Film Company Has 'Concentrated' Plans for Expansion Mirror Film Company Has 'Concentrated' Plans for Expansion Mirror Film Company Has 'Concentrated' Plans for Expansion September 10, 2010 - 1:19pm Addthis Lorelei Laird Writer, Energy Empowers In concentrating solar power, glass is king-but it's fighting to hold on to its crown. The reflectivity of glass mirrors makes them a great choice for focusing sunlight onto a heat generator. However, the glass mirrors can be expensive and heavy -- reducing their ability to compete with conventional energy sources. ReflecTech Inc. has an option: a silvered polymer-based film that does the same job, but with half the weight and cost. Using that film, the company can make 100,000 square feet of mirror panels per year at its factory in Arvada, Colo. Through an Advanced Manufacturing 48C tax credit through the Recovery Act,

310

Microsoft Word - MunroControlCenterExpansionCX.docx  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

9, 2012 9, 2012 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Joseph Bebee TESF-CSB-2 Proposed Action: Munro Control Center Expansion Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.15 Support Buildings Location: Spokane, Washington Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: The proposed project includes a 30,000 square foot (sf) expansion to the east side of the existing building and a total of 53,500 sf of additional paved surfaces for access roads and parking to the north. All proposed activities would be on previously disturbed BPA property. The expansion of the existing Munro Control Center is to provide an alternate facility that would support critical BPA functions in the case of a major

311

Perturbation Expansion for Option Pricing with Stochastic Volatility  

E-Print Network (OSTI)

We fit the volatility fluctuations of the S&P 500 index well by a Chi distribution, and the distribution of log-returns by a corresponding superposition of Gaussian distributions. The Fourier transform of this is, remarkably, of the Tsallis type. An option pricing formula is derived from the same superposition of Black-Scholes expressions. An explicit analytic formula is deduced from a perturbation expansion around a Black-Scholes formula with the mean volatility. The expansion has two parts. The first takes into account the non-Gaussian character of the stock-fluctuations and is organized by powers of the excess kurtosis, the second is contract based, and is organized by the moments of moneyness of the option. With this expansion we show that for the Dow Jones Euro Stoxx 50 option data, a Delta-hedging strategy is close to being optimal.

Jizba, Petr; Haener, Patrick

2007-01-01T23:59:59.000Z

312

Cryogenic expansion joint for large superconducting magnet structures  

DOE Patents (OSTI)

An expansion joint is provided that accommodates dimensional changes occurring during the cooldown and warm-up of large cryogenic devices such as superconducting magnet coils. Flattened tubes containing a refrigerant such as gaseous nitrogen (N.sub.2) are inserted into expansion spaces in the structure. The gaseous N.sub.2 is circulated under pressure and aids in the cooldown process while providing its primary function of accommodating differential thermal contraction and expansion in the structure. After lower temperatures are reached and the greater part of the contraction has occured, the N.sub.2 liquefies then solidifies to provide a completely rigid structure at the cryogenic operating temperatures of the device.

Brown, Robert L. (Kingston, TN)

1978-01-01T23:59:59.000Z

313

Quantum Indeterminacy in Local Measurement of Cosmic Expansion  

E-Print Network (OSTI)

For a system of two small bodies in an expanding universe, bounds on mass and separation are estimated, from standard gravity and quantum mechanics, such that both their gravity and the process of quantum measurement affect their motion less than the cosmic expansion does. It is shown that such a direct local measurement of cosmic expansion or acceleration at rate $H$ is only possible, even in principle, in a region of size greater than $H^{-3/5}$ in Planck units, or about 60 meters in the current universe, a new scale that defines a boundary between quantum and classical expansion. A generalization to spatially extended linear density perturbations shows the same scale. Matching vacuum energy or directional information in localized field states to gravity on this system length scale yields a particle mass scale of $H^{3/10}$, or about 7 GeV today. Possible connections of cosmic acceleration with the QCD vacuum are discussed.

Craig J. Hogan

2013-12-30T23:59:59.000Z

314

Quantum indeterminacy in local measurement of cosmic expansion  

E-Print Network (OSTI)

For a system of two small bodies in an expanding universe, bounds on mass and separation are estimated, from standard gravity and quantum mechanics, such that both their gravity and the process of quantum measurement affect their motion less than the cosmic expansion does. It is shown that such a direct local measurement of cosmic expansion or acceleration at rate $H$ is only possible, even in principle, in a region of size greater than $H^{-3/5}$ in Planck units, or about 60 meters in the current universe, a new scale that defines a boundary between quantum and classical expansion. A generalization to spatially extended linear density perturbations shows the same scale. Matching vacuum energy or directional information in localized field states to gravity on this system length scale yields a particle mass scale of $H^{3/10}$, or about 7 GeV today. Possible connections of cosmic acceleration with the QCD vacuum are discussed.

Hogan, Craig J

2013-01-01T23:59:59.000Z

315

Perturbation Expansion for Option Pricing with Stochastic Volatility  

E-Print Network (OSTI)

We fit the volatility fluctuations of the S&P 500 index well by a Chi distribution, and the distribution of log-returns by a corresponding superposition of Gaussian distributions. The Fourier transform of this is, remarkably, of the Tsallis type. An option pricing formula is derived from the same superposition of Black-Scholes expressions. An explicit analytic formula is deduced from a perturbation expansion around a Black-Scholes formula with the mean volatility. The expansion has two parts. The first takes into account the non-Gaussian character of the stock-fluctuations and is organized by powers of the excess kurtosis, the second is contract based, and is organized by the moments of moneyness of the option. With this expansion we show that for the Dow Jones Euro Stoxx 50 option data, a Delta-hedging strategy is close to being optimal.

Petr Jizba; Hagen Kleinert; Patrick Haener

2007-08-22T23:59:59.000Z

316

Horse Hollow Expansion Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Horse Hollow Expansion Wind Farm Horse Hollow Expansion Wind Farm Facility Horse Hollow Expansion Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner NextEra Energy Resources Developer NextEra Energy Resources Energy Purchaser Market Location Near Abilene TX Coordinates 32.243193°, -100.265633° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.243193,"lon":-100.265633,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

317

Century Expansion (4Q07) Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Century Expansion (4Q07) Wind Farm Century Expansion (4Q07) Wind Farm Facility Century Expansion (4Q07) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner MidAmerican Energy Developer MidAmerican Energy Energy Purchaser MidAmerican Energy Location IA Coordinates 42.495789°, -93.652368° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.495789,"lon":-93.652368,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

318

Properties of derivative expansion approximations to the renormalization group  

E-Print Network (OSTI)

Approximation only by derivative (or more generally momentum) expansions, combined with reparametrization invariance, turns the continuous renormalization group for quantum field theory into a set of partial differential equations which at fixed points become non-linear eigenvalue equations for the anomalous scaling dimension $\\eta$. We review how these equations provide a powerful and robust means of discovering and approximating non-perturbative continuum limits. Gauge fields are briefly discussed. Particular emphasis is placed on the r\\^ole of reparametrization invariance, and the convergence of the derivative expansion is addressed.

Tim R. Morris

1996-10-02T23:59:59.000Z

319

Corresponding states for mesostructure and dynamics of supercooled water  

E-Print Network (OSTI)

Water famously expands upon freezing, foreshadowed by a negative coefficient of expansion of the liquid at temperatures close to its freezing temperature. These behaviors, and many others, reflect the energetic preference for local tetrahedral arrangements of water molecules and entropic effects that oppose it. Here, we provide theoretical analysis of mesoscopic implications of this competition, both equilibrium and non-equilibrium, including mediation by interfaces. With general scaling arguments bolstered by simulation results, and with reduced units that elucidate corresponding states, we derive a phase diagram for bulk and confined water and water-like materials. For water itself, the corresponding states cover the temperature range of 150 K to 300 K and the pressure range of 1 bar to 2 kbar. In this regime, there are two reversible condensed phases - ice and liquid. Out of equilibrium, there is irreversible polyamorphism, i.e., more than one glass phase, reflecting dynamical arrest of coarsening ice. Temperature-time plots are derived to characterize time scales of the different phases and explain contrasting dynamical behaviors of different water-like systems.

David T. Limmer; David Chandler

2013-05-07T23:59:59.000Z

320

Century Expansion (08) Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Century Expansion (08) Wind Farm Century Expansion (08) Wind Farm Jump to: navigation, search Name Century Expansion (08) Wind Farm Facility Century Expansion (08) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner MidAmerican Energy Developer MidAmerican Energy Energy Purchaser MidAmerican Energy Location IA Coordinates 42.504142°, -93.656316° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.504142,"lon":-93.656316,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Exploiting underrepresented query aspects for automatic query expansion  

Science Conference Proceedings (OSTI)

Users attempt to express their search goals through web search queries. When a search goal has multiple components or aspects, documents that represent all the aspects are likely to be more relevant than those that only represent some aspects. Current ... Keywords: aspect coverage, global document analysis, query expansion, web search

Daniel Wayne Crabtree; Peter Andreae; Xiaoying Gao

2007-08-01T23:59:59.000Z

322

Prudhoe expansion. Sohio to triple North Slope presence  

Science Conference Proceedings (OSTI)

Sohio Alaska Petroleum Co. will spend $5.5 billion during the next 5 years to enhance and continue oil production at Prudhoe Bay where the company owns ca. 53% of the oil reserves. Sohio will nearly triple its physical presence on the Slope by the end of 1986, and almost double its Prudhoe staff during that period. A construction work force of between 1500 and 1700 will be required during the 5-year expansion period. Sohio's ongoing production of crude oil averages ca. 840,000 bpd. To continue at this rate, the company plans 29 separation projects on the Slope and completion of an estimated 265 wells over the next 5 years. Many of these projects will be completed over a 5- to 6-yr period. The following are several of Sohio's major 5-year plan projects: produced water expansion; wellpad manifolding; low pressure separation systems; production flowline expansion; artificial gas lift; west side waterflood; gas gathering line loop; west end development, Eileen area; and central power station expansion. A brief description of each project is given.

Not Available

1981-12-01T23:59:59.000Z

323

Procedures to predict vertical differential soil movement for expansive soils  

E-Print Network (OSTI)

Damage to lightly loaded structures, paving and service piping in areas of expansive clay soils has occurred throughout the world. The cause of this damage has been the inability to accurately model expansive soil movement so that foundations are adequately designed to withstand the movement. The amount and rate of differential soil movement for expansive soils is due to a combination of soil characteristics, namely: suction compression index, unsaturated permeability, and diffusivity. Currently, geotechnical engineers run tests to measure the soil properties required to estimate differential soil movements. However, there seems to be apprehension toward attempting these soil movement calculations due to the perceived complexity of the calculations or a simple lack of understanding of the theory. The procedures delineating the step by step process used to calculate suction profiles and volume strains of expansive soils is presented. These procedures include the methodology to predict soil heave and shrink underneath shallow foundations which generate maximum center lift and maximum edge lift slab distortion modes. The main contributions of this research are: equations and procedures to calculate the equilibrium suction profile and depth to constant suction for a particular soil profile and location, equations to calculate the horizontal velocity flow of water in unsaturated soils, the methodology to predict differential soil movement shortly after a slab has been constructed and before the soil under the slab has reached an equilibrium moisture content, and the procedures to apply differential soil movement theory to soil profiles with shallow foundation design.

Naiser, Donald David

1997-01-01T23:59:59.000Z

324

Skew-Radial Basis Function Expansions for Empirical Modeling  

Science Conference Proceedings (OSTI)

We propose a skew-radial basis function (sRBF) expansion for the empirical model fitting problem. sRBFs employ a standard radial term, which is now made asymmetric by modulating, or skewing it with another function. The additional parameters in the skewing ... Keywords: data fitting, data interpolation, function approximation, manifold learning, radial basis function, skew-radial basis function

Arta A. Jamshidi; Michael J. Kirby

2009-11-01T23:59:59.000Z

325

YOKAYO BIOFUELS, INC. GRANT FOR IMPROVEMENTS AND EXPANSION OF  

E-Print Network (OSTI)

YOKAYO BIOFUELS, INC. GRANT FOR IMPROVEMENTS AND EXPANSION OF AN EXISTING FACILITY INITIAL STUDY-11-601) to expand an existing biofuels production facility (Yokayo Biofuels, Inc.) located at 350 Orr: THE PROPOSED PROJECT: Yokayo Biofuels, Inc. is an existing biofuels facility located at 350 Orr Springs Road

326

Exploration of Resource and Transmission Expansion Decisions in  

E-Print Network (OSTI)

coordination among renewable developers, utilities and transmission owners, resource and transmission planners for coordinating transmission expansion in the Western Interconnection. In this report we use a new tool developed Coordinating Council WEIL Western Electric Industry Leaders WGA Western Governors Association WREZ Western

327

Searching consumer image collections using web-based concept expansion  

Science Conference Proceedings (OSTI)

As consumers accumulate more and more personal imagery, searching for specific images has become increasingly difficult. Consumers typically provide little or no annotations, and automated classifiers and concept tagging tools are limited in their scope ... Keywords: concept expansion, flickr, image search, multimedia retrieval, multimedia search, semantic search, wordnet

Mark D. Wood; Alexander Loui; Stacie Hibino

2010-10-01T23:59:59.000Z

328

Distributional similarity vs. PU learning for entity set expansion  

Science Conference Proceedings (OSTI)

Distributional similarity is a classic technique for entity set expansion, where the system is given a set of seed entities of a particular class, and is asked to expand the set using a corpus to obtain more entities of the same class as represented ...

Xiao-Li Li; Lei Zhang; Bing Liu; See-Kiong Ng

2010-07-01T23:59:59.000Z

329

Langevin molecular dynamics derived from Ehrenfest dynamics  

E-Print Network (OSTI)

Stochastic Langevin molecular dynamics for nuclei is derived from the Ehrenfest Hamiltonian system (also called quantum classical molecular dynamics) in a Kac-Zwanzig setting, with the initial data for the electrons stochastically perturbed from the ground state and the ratio, $M$, of nuclei and electron mass tending to infinity. The Ehrenfest nuclei dynamics is approximated by the Langevin dynamics with accuracy $o(M^{-1/2})$ on bounded time intervals and by $o(1)$ on unbounded time intervals, which makes the small $\\mathcal{O}(M^{-1/2})$ friction and $o(M^{-1/2})$ diffusion terms visible. The initial electron probability distribution is a Gibbs density at low temperture, derived by a stability and consistency argument: starting with any equilibrium measure of the Ehrenfest Hamiltonian system, the initial electron distribution is sampled from the equilibrium measure conditioned on the nuclei positions, which after long time leads to the nuclei positions in a Gibbs distribution (i.e. asymptotic stability); by consistency the original equilibrium measure is then a Gibbs measure.The diffusion and friction coefficients in the Langevin equation satisfy the Einstein's fluctuation-dissipation relation.

Anders Szepessy

2007-12-21T23:59:59.000Z

330

Korean stochastic word-spacing with dynamic expansion of candidate words list  

Science Conference Proceedings (OSTI)

The main aim of this work is to implement stochastic Korean Word-Spacing System which is equally robust for both inner-data and external-data. Word-spacing in Korean is influential in deciding semantic and syntactic scope. In order to cope with various ...

Mi-young Kang; Sung-ja Choi; Ae-sun Yoon; Hyuk-chul Kwon

2004-03-01T23:59:59.000Z

331

ORIGINAL PAPER Range expansion and population dynamics of co-occurring  

E-Print Network (OSTI)

at Harvard Forest, Petersham, MA, USA. High pressure flow meter (HPFM) The HPFM was constructed according

Preisser, Evan

332

Dynamical Expansion of Ionization and Dissociation Front around a Massive Star : A Starburst Mechanism  

E-Print Network (OSTI)

We quantitatively examine the significance of star formation triggered in the swept-up shell around an expanding HII region. If the swept-up molecular gas is sufficiently massive, new OB stars massive enough to repeat the triggering process will form in the shell. We determine the lower limit (M_thr) for the mass of the star that sweeps up the molecular gas, where at least one new star with mass M_* > M_thr forms after the shell fragmentation. To calculate the threshold stellar mass, M_thr, we examine how massive molecular shells can form around various central stars, by performing detailed numerical radiation hydrodynamics calculations. The mass of the photodissociated gas is generally larger than the mass of the photoionized gas. However, the swept-up molecular mass exceeds the photodissociated mass with a higher-mass star of M_* > 20 Msun. The accumulated molecular mass generally increases with the stellar mass, and amounts to 10^{4-5} Msun for M_* > 20 Msun with an ambient density of n \\sim 100/cc. The threshold stellar mass is M_thr \\sim 18 Msun with the star-formation efficiency of \\epsilon \\sim 0.1 and n \\sim 100/cc. We examine the generality of this mode of run-away triggering for different sets of parameters, and found that M_thr \\sim 15-20 Msun in various situations. If the ambient density is too high or the star-formation efficiency is too low, the triggering is not run-away, but a single event.

Takashi Hosokawa; Shu-ichiro Inutsuka

2006-07-26T23:59:59.000Z

333

Earth pressures and deformations in civil infrastructure in expansive soils  

E-Print Network (OSTI)

This dissertation includes the three major parts of the study: volume change, and lateral earth pressure due to suction change in expansive clay soils, and design of civil infrastructure drilled pier, retaining wall and pavement in expansive soils. The volume change model in expansive clay has been refined to reinforce realistic characteristics of swelling and shrinkage behavior of expansive clay soils. Refinements include more realistic design soil suction versus depth profiles and improved characterizations of the effects of soil cracking, overburden stress, and lateral earth pressure. The refined model also includes an algorithm of assigning suctionvolumetric water content curves and diffusivity through the soil. The typical lateral earth pressure distribution during wetting against a stationary wall is proposed. The proposed stationary retaining wall-soil system in expansive soils includes an upper movement active zone and a lower anchor zone. Mohrâ s circles and failure envelopes are used to define the effective horizontal stress and shear failure in an unsaturated soil. The prediction of the horizontal pressures due to suction change in a soil is compared with the in situ measurement of natural horizontal pressures and the measurements from the large scale tests. It is found that agreement between the measured and predicted horizontal pressures is satisfactory. Case studies of axial and bending of the pier are presented with both uniform and non-uniform wetting. The pier case study for axial behavior shows a good agreement with a heave at ground surface and uplift forces. Three case studies for bending behavior of the pier and retaining wall are presented based on suction change. Pavement design program has been refined to extend the design capabilities into both flexible and rigid pavements supported by pavement treatments. The comparative case studies using both current and new methods in pavement design show that the current method criterion of 1-inch is unnecessarily conservative. Furthermore, the current method does not provide a means of anticipating subgrade shrinkage that will result in longitudinal cracking along the edge of the pavement. The design calculations with both methods lead to the conclusion that neither the swelling movement, as in the current method, nor the total movement, as in the new method, is a reliable indicator of likely acceptable pavement performance. Instead, all of these case studies show that it is important to use the predicted history of the present serviceability index and the international roughness index as the proper design guideline for an acceptable treatment of the subgrade of an expansive soil.

Hong, Gyeong Taek

2008-05-01T23:59:59.000Z

334

Thermal expansion and decomposition of jarosite: a high-temperature neutron diffraction study  

DOE Green Energy (OSTI)

The structure of deuterated jarosite, KFe{sub 3}(SO{sub 4}){sub 2}(OD){sub 6}, was investigated using time-of-flight neutron diffraction up to its dehydroxylation temperature. Rietveld analysis reveals that with increasing temperature, its c dimension expands at a rate {approx}10 times greater than that for a. This anisotropy of thermal expansion is due to rapid increase in the thickness of the (001) sheet of [Fe(O,OH){sub 6}] octahedra and [SO{sub 4}] tetrahedra with increasing temperature. Fitting of the measured cell volumes yields a coefficient of thermal expansion, a = a{sub 0} + a{sub 1} T, where a{sub 0} = 1.01 x 10{sup -4} K{sup -1} and a{sub 1} = -1.15 x 10{sup -7} K{sup -2}. On heating, the hydrogen bonds, O1{hor_ellipsis}D-O3, through which the (001) octahedral-tetrahedral sheets are held together, become weakened, as reflected by an increase in the D{hor_ellipsis}O1 distance and a concomitant decrease in the O3-D distance with increasing temperature. On further heating to 575 K, jarosite starts to decompose into nanocrystalline yavapaiite and hematite (as well as water vapor), a direct result of the breaking of the hydrogen bonds that hold the jarosite structure together.

Xu, Hongwu [Los Alamos National Laboratory; Zhao, Yusheng [Los Alamos National Laboratory; Vogel, Sven C [Los Alamos National Laboratory; Hickmott, Donald D [Los Alamos National Laboratory; Daemen, Luke L [Los Alamos National Laboratory; Hartl, Monika A [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

335

Microsoft Word - PearlSubExpansion_CX.docx  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3, 2012 3, 2012 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Johny Luiz - TEP-CSB-2 Proposed Action: Pearl Substation 500-kilovolt (kV) #6 Bay Addition Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 Additions and modifications to transmission facilities Location: Clackamas County, Oregon Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: The proposed project includes modification of existing substation equipment, the addition of a new 500-kV Bay 6, and a one-half acre yard expansion in the southwest corner of the substation. The yard expansion area is within BPA property, consists of mowed grass, and is to facilitate a 40 square foot addition to the Pearl Control House

336

Microsoft Word - CX_DeMoss_Substation_Expansion_130531  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Alaric Hsu Alaric Hsu Project Manager - TEP-CSB-2 Proposed Action: De Moss Substation Expansion Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 Additions and modifications to transmission facilities Location: Sherman County, Oregon Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to expand its De Moss Substation yard located in Sherman County, Oregon. The expansion is necessary to install additional reactors that would provide the necessary reactive support to address the extreme high voltage at De Moss Substation resulting from the loss of the Big Eddy - DeMoss transmission line during winter peak conditions. The equipment at De Moss Substation is currently sustaining voltage

337

Secretary Bodman Meets with Qatari Officials to Promote Energy Expansion  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Qatari Officials to Promote Energy Qatari Officials to Promote Energy Expansion Efforts Secretary Bodman Meets with Qatari Officials to Promote Energy Expansion Efforts January 22, 2008 - 10:53am Addthis Thanks U.S. Troops at Camp As-Sayliyah in Qatar for their service DOHA, QATAR - On his fourth stop of a six-nation swing through the Middle East and Europe, U.S. Secretary of Energy Samuel W. Bodman today met with Qatari Amir H.H. Sheikh Hamad Bin Khalifa Al Thani and Qatari Deputy Prime Minister and Energy Minister Abdullah Al-Attiyah to discuss the importance of investments to expand oil and natural gas production, protect critical energy infrastructure as well as promote research and development to diversify world energy supplies. Secretary Bodman also visited U.S. troops at Camp As-Sayliyah to convey the respect and appreciation of the

338

Model Independent Early Expansion History and Dark Energy  

E-Print Network (OSTI)

We examine model independent constraints on the high redshift and prerecombination expansion history from cosmic microwave background observations, using a combination of principal component analysis and other techniques. This can be translated to model independent limits on early dark energy and the number of relativistic species $N_{\\rm eff}$. Models such as scaling (Doran-Robbers), dark radiation ($\\Delta N_{\\rm eff}$), and barotropic aether fall into distinct regions of eigenspace and can be easily distinguished from each other. Incoming CMB data will map the expansion history from $z=0$--$10^5$, achieving subpercent precision around recombination, and enable determination of the amount of early dark energy and valuable guidance to its nature.

Samsing, Johan; Smith, Tristan L

2012-01-01T23:59:59.000Z

339

Experiences using DAKOTA stochastic expansion methods in computational simulations.  

SciTech Connect

Uncertainty quantification (UQ) methods bring rigorous statistical connections to the analysis of computational and experiment data, and provide a basis for probabilistically assessing margins associated with safety and reliability. The DAKOTA toolkit developed at Sandia National Laboratories implements a number of UQ methods, which are being increasingly adopted by modeling and simulation teams to facilitate these analyses. This report disseminates results as to the performance of DAKOTA's stochastic expansion methods for UQ on a representative application. Our results provide a number of insights that may be of interest to future users of these methods, including the behavior of the methods in estimating responses at varying probability levels, and the expansion levels for the methodologies that may be needed to achieve convergence.

Templeton, Jeremy Alan; Ruthruff, Joseph R.

2012-01-01T23:59:59.000Z

340

Supersaturated Turbine Expansions for Binary Geothermal Power Plants  

DOE Green Energy (OSTI)

The Heat Cycle Research project is developing the technology base that will permit a much greater utilization of the moderate-temperature, liquid-dominated geothermal resources, particularly for the generation of electrical power. The emphasis in the project has been the improvement of the performance of binary power cycles. The investigations have been examining concepts projected to improve the brine utilization by 20% relative to a ''Heber-type'' binary plant; these investigations are nearing completion. preparations are currently underway in the project to conduct field investigations of the condensation behavior of supersaturated turbine expansions. These investigations will evaluate whether the projected additional 8% to 10% improvement in brine utilization can be realized by allowing these expansions. Future program efforts will focus on the problems associated with heat rejection and on the transfer of the technology being developed to industry.

Bliem, C.J.; Mines, G.L.

1992-03-24T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Intermediate Vapor Expansion Distillation and Nested Enrichment Cascade Distillation  

E-Print Network (OSTI)

Although it is known that incorporating an intermediate reboiler or reflux condenser in a distillation column will improve column efficiency by 15 to 100%, there has been little use of this technique to date." Intermediate vapor compression heat pumping was recently introduced as one practical means of achieving this benefit. Introduced in this paper are two new means having added advantages over compression: intermediate vapor expansion heat pumping, and nested enrichment cascades. In both cases the efficiency advantage is obtained without requiring import of shaft work. With intermediate vapor expansion, the expander is more efficient and less costly than the compressor which achieves comparable improvement in distillation efficiency. With the "nested enrichment" technique, the increased efficiency is obtained without requiring either compressors or expanders.

Erickson, D. C.

1986-06-01T23:59:59.000Z

342

Mastering Uncertainty and Risk at Multiple Time Scales in the Future Electrical Grid  

SciTech Connect

Today's electrical grids enjoy a relatively clean separation of spatio-temporal scales yielding a compartmentalization of grid design, optimization, control and risk assessment allowing for the use of conventional mathematical tools within each area. In contrast, the future grid will incorporate time-intermittent renewable generation, operate via faster electrical markets, and tap the latent control capability at finer grid modeling scales; creating a fundamentally new set of couplings across spatiotemporal scales and requiring revolutionary advances in mathematics techniques to bridge these scales. One example is found in decade-scale grid expansion planning in which today's algorithms assume accurate load forecasts and well-controlled generation. Incorporating intermittent renewable generation creates fluctuating network flows at the hourly time scale, inherently linking the ability of a transmission line to deliver electrical power to hourly operational decisions. New operations-based planning algorithms are required, creating new mathematical challenges. Spatio-temporal scales are also crossed when the future grid's minute-scale fluctuations in network flows (due to intermittent generation) create a disordered state upon which second-scale transient grid dynamics propagate effectively invalidating today's on-line dynamic stability analyses. Addressing this challenge requires new on-line algorithms that use large data streams from new grid sensing technologies to physically aggregate across many spatial scales to create responsive, data-driven dynamic models. Here, we sketch the mathematical foundations of these problems and potential solutions.

Chertkov, Michael [Los Alamos National Laboratory; Bent, Russell W. [Los Alamos National Laboratory; Backhaus, Scott N. [Los Alamos National Laboratory

2012-07-10T23:59:59.000Z

343

Dislocation Dynamics  

Science Conference Proceedings (OSTI)

Mar 7, 2013 ... Recent Progress in Dislocation Dynamics: Sylvie Aubry1; Athanasios Arsenlis1; Wei Cai2; Steve Fitzgerald3; 1LLNL; 2Stanford University; ...

344

Cluster expansion of fcc Pd-V intermetallics  

Science Conference Proceedings (OSTI)

A cluster expansion is used to compute fcc ground states from first principles for the Pd-V system. Intermetallic structures are not assumed but derived rigorously by minimizing the configurational energy subject to linear constraints. A large number of concentration-independent interactions are calculated by the method of direct configurational averaging. Agreement with the fcc-based portion of the experimentally-determined Pd-V phase diagram is quite satisfactory. 25 refs., 2 figs.

de Fontaine, D.; Wolverton, C.; Ceder, G. (Lawrence Berkeley Lab., CA (United States)); Dreysse, H. (Nancy-1 Univ., 54 (France). Lab. de Physique du Solide)

1991-06-01T23:59:59.000Z

345

Uptake swelling and thermal expansion of CFRP tendons  

E-Print Network (OSTI)

research. Changes in the concrete cover do not have much of an influence on the maximum hoop stress generated. However, this should be treated with caution since the analysis in Figure 11 only considers elastic behaviour up to first cracking. The concrete... composites. Journal of Composite Materials, 1978, 12, No. 2, 153–168. 15. TOMPKINS S. S. Thermal expansion of selected graphite- reinforced polyimide-, epoxy- and glass-matrix composites. International Journal of Thermophysics, 1987, 8, No. 1, 119–132. 16...

Scott, P.; Lees, Janet M.

2009-08-01T23:59:59.000Z

346

Expansion on reduction of calcium doped lanthanum chromite  

DOE Green Energy (OSTI)

Doped lanthanum chromites have been considered as interconnect materials for the solid oxide fuel cell (SOFC) because of their favorable chemical and electrical properties under both oxidizing and reducing environments. Several investigators have studied the materials properties of the doped lanthanum chromites to optimize their overall performance as an interconnect material. These properties include electrical conductivity, thermal expansion, sinterability, and chemical compatibility with other cell components. These properties are optimized by the amount of dopants substituted into chromite which are usually Ca or Sr. Figure 1 shows the range of values for these properties. Another important characteristic becoming more of a concern as investigators are building SOFC stacks is that doped lanthanum chromite expands when reduced in a low oxygen partial pressure (pO{sub 2}) (<10{sup -12} atm). Plates used to separate oxidizing and fuel gases can deform because of the pO{sub 2} gradient across the interconnect material. This presentation is a summary of work which will be presented at the Fourth International Symposium on Solid Oxide Fuel Cells. In this article, the possible causes of expansion on reduction of the interconnect will be discussed by using a two-dimensional crystal model. The biaxial strain of the stack is calculated under the assumption that the cell components are forced to remain planar. From this, the maximum stress buildup in the interconnect and electrolyte is estimated. In addition, the effects of thermal expansion mismatch and expansion on reduction of the interconnect are compared, and the optimum interconnect composition from a mechanical standpoint is reported.

Carter, J.D.; Hendriksen, P.V.; Mogensen, M. [Riso National Lab., Roskilde (Denmark). Materials Dept.

1995-07-01T23:59:59.000Z

347

Expansion Joint Concepts for High Temperature Insulation Systems  

E-Print Network (OSTI)

As high temperature steam and process piping expands with heat, joints begin to open between the insulation sections, resulting in increased energy loss and possible unsafe surface temperatures. Many different expansion joint designs are presently in use for both single and double layer insulation construction. However, due to the installation cost reduction associated with single layer systems and increased thickness capabilities of insulation manufacturers, much attention is being given to utilizing single layer construction as much as possible.

Harrison, M. R.

1980-01-01T23:59:59.000Z

348

Integrated framework for analysis: electric sector expansion in developing countries  

Science Conference Proceedings (OSTI)

The objective of this dissertation is the development of an analytical framework for the assessment of electric sector expansion strategies in developing countries, in the context of overall development planning, and with particular emphasis on macroeconomic and social implications. The framework will ensure that each electric capacity expansion alternative is linked quantitatively and consistently with a given economic development plan. The analytical model employs an integrated set of technological and economic models to explore the national energy and economy response to electric sector expansion planning for the Korean case. In this study, two integrated models were developed. The integrated model 1 is composed of a macroeconomic model, an energy input-output model, and an energy network flow model. This model accounts for the relationships of energy demand with overall economic development, and interfuel substitution, for the relationships between the investment capital required to meet astated levels of electric demand and overall investment planning and foreign exchange requirements, and economic impacts of the energy sector on gross national product (GNP) and balance of payments (BOP). The integrated model 2 is composed of an energy input-output model, and energy network flow model, and a GNP identify constraint,and calculates the macroeconomic-balanced level of comsumption, electric sector investments, industrial sector investments, and energy imports given policy-determined GNP and other GNP components. The two models were applied ot the Korean case by using a trial scenario and assumed input data. Computational results demonstrate and prove the workability of the models.

Lee, M.K.

1982-01-01T23:59:59.000Z

349

Molecular Dynamics Study of Krypton Isotopes Physisorbed on Graphite  

E-Print Network (OSTI)

Equations of Motion in Molecular Dynamics” Lecture Notes,OF CALIFORNIA RIVERSIDE Molecular Dynamics Study of Krypton2.5 Choice of Time step in Molecular Dynamics 2.6 Desorption

Bader, Karson

2012-01-01T23:59:59.000Z

350

A dynamic adjustment strategy for file transformation in data grids  

Science Conference Proceedings (OSTI)

In this paper, we propose a dynamic file transfer scheme with coallocation architecture, called Dynamic Adjustment Strategy, a dynamic file transfer scheme with co-allocation architecture that reduce the file transfer times and improves the performance ...

Chao-Tung Yang; Shih-Yu Wang; Chun-Pin Fu

2007-09-01T23:59:59.000Z

351

Discrete space-time symmetries  

SciTech Connect

Symmetries have always fascinated human beings; they are found in nature, art, and architecture. Physicists, like other scientists have often used symmetries as a basis of their understanding of nature. When the dynamics is unknown, symmetries serve to delineate and define it. When the dynamics is known, symmetries are used to study structure. These two lectures review the theory and present understanding and status of two discrete space-time symmetries,, namely parity (P) and time reversal (T).

Henley, E.M.

1992-12-31T23:59:59.000Z

352

Discrete space-time symmetries  

SciTech Connect

Symmetries have always fascinated human beings; they are found in nature, art, and architecture. Physicists, like other scientists have often used symmetries as a basis of their understanding of nature. When the dynamics is unknown, symmetries serve to delineate and define it. When the dynamics is known, symmetries are used to study structure. These two lectures review the theory and present understanding and status of two discrete space-time symmetries,, namely parity (P) and time reversal (T).

Henley, E.M.

1992-01-01T23:59:59.000Z

353

Energy recovery during expansion of compressed gas using power plant low-quality heat sources  

SciTech Connect

A method of recovering energy from a cool compressed gas, compressed liquid, vapor, or supercritical fluid is disclosed which includes incrementally expanding the compressed gas, compressed liquid, vapor, or supercritical fluid through a plurality of expansion engines and heating the gas, vapor, compressed liquid, or supercritical fluid entering at least one of the expansion engines with a low quality heat source. Expansion engines such as turbines and multiple expansions with heating are disclosed.

Ochs, Thomas L. (Albany, OR); O' Connor, William K. (Lebanon, OR)

2006-03-07T23:59:59.000Z

354

Residual ionization in the expansion of a laser-produced plasma  

SciTech Connect

A condition is found for determining the stage of plasma expansion in vacuum at which ionization quenching occurs.

Busygin, A.I.

1977-11-01T23:59:59.000Z

355

Dynamical pairing states in cold gases  

E-Print Network (OSTI)

In this thesis, we study dynamical pairing of fermions caused by the time-dependent interaction. Fermionic pairing develops on time scales short compared to the quasiparticle relaxation time where existing approaches to ...

Barankov, Roman A

2006-01-01T23:59:59.000Z

356

Relation between thermal expansion and interstitial formation energy in pure Fe and Cr  

E-Print Network (OSTI)

Relation between thermal expansion and interstitial formation energy in pure Fe and Cr Janne potentials give lower interstitial formation energy, but predict too small thermal expansion. We also show vacancy activation energy. Thermal expansion coefficients as function of temperature are displayed in Fig

357

The WiggleZ Dark Energy Survey: measuring the cosmic expansion history using the Alcock-Paczynski test and distant supernovae  

E-Print Network (OSTI)

Astronomical observations suggest that today's Universe is dominated by a dark energy of unknown physical origin. One of the most notable consequences in many models is that dark energy should cause the expansion of the Universe to accelerate: but the expansion rate as a function of time has proven very difficult to measure directly. We present a new determination of the cosmic expansion history by combining distant supernovae observations with a geometrical analysis of large-scale galaxy clustering within the WiggleZ Dark Energy Survey, using the Alcock-Paczynski test to measure the distortion of standard spheres. Our result constitutes a robust and non-parametric measurement of the Hubble expansion rate as a function of time, which we measure with 10-15% precision in four bins within the redshift range 0.1 < z < 0.9. We demonstrate that the cosmic expansion is accelerating, in a manner independent of the parameterization of the cosmological model (although assuming cosmic homogeneity in our data analy...

Blake, Chris; Davis, Tamara; Brough, Sarah; Colless, Matthew; Contreras, Carlos; Couch, Warrick; Croom, Scott; Drinkwater, Michael J; Forster, Karl; Gilbank, David; Gladders, Mike; Jelliffe, Ben; Jurek, Russell J; Li, I-hui; Madore, Barry; Martin, Chris; Pimbblet, Kevin; Poole, Gregory; Pracy, Michael; Sharp, Rob; Wisnioski, Emily; Woods, David; Wyder, Ted; Yee, Howard

2011-01-01T23:59:59.000Z

358

Entanglement dynamics during decoherence  

Science Conference Proceedings (OSTI)

The evolution of the entanglement between oscillators that interact with the same environment displays highly non-trivial behavior in the long time regime. When the oscillators only interact through the environment, three dynamical phases were identified ... Keywords: 03.65.Yz, 03.67.Bg, 03.67.Mn, 05.40.Jc, Decoherence, Entanglement, Quantum Brownian Motion

Juan Pablo Paz; Augusto J. Roncaglia

2009-12-01T23:59:59.000Z

359

Evaluating transport coefficients in real time thermal field theory  

E-Print Network (OSTI)

Transport coefficients in a hadronic gas have been calculated earlier in the imaginary time formulation of thermal field theory. The steps involved are to relate the defining retarded correlation function to the corresponding time-ordered one and to evaluate the latter in the conventional perturbation expansion. Here we carry out both the steps in the real time formulation.

S. Mallik; Sourav Sarkar

2012-11-12T23:59:59.000Z

360

Managing time  

Science Conference Proceedings (OSTI)

Professionals overwhelmed with information glut can find hope from new insights about time management.

Peter J. Denning

2011-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

The Dynamical Discrete Web  

E-Print Network (OSTI)

The dynamical discrete web (DDW), introduced in recent work of Howitt and Warren, is a system of coalescing simple symmetric one-dimensional random walks which evolve in an extra continuous dynamical parameter s. The evolution is by independent updating of the underlying Bernoulli variables indexed by discrete space-time that define the discrete web at any fixed s. In this paper, we study the existence of exceptional (random) values of s where the paths of the web do not behave like usual random walks and the Hausdorff dimension of the set of such exceptional s. Our results are motivated by those about exceptional times for dynamical percolation in high dimension by H\\"aggstrom, Peres and Steif, and in dimension two by Schramm and Steif. The exceptional behavior of the walks in DDW is rather different from the situation for dynamical random walks of Benjamini, H\\"aggstrom, Peres and Steif. In particular, we prove that there are exceptional values of s for which the walk from the origin S^s(n) has limsup S^s(n)/\\sqrt n \\leq K with a nontrivial dependence of the Hausdorff dimension on K. We also discuss how these and other results extend to the dynamical Brownian web, a natural scaling limit of DDW. The scaling limit is the focus of a paper in preparation; it was studied by Howitt and Warren and is related to the Brownian net of Sun and Swart.

L. R. G. Fontes; C. M. Newman; K. Ravishankar; E. Schertzer

2007-04-20T23:59:59.000Z

362

Operation of Mammoth Pacific`s MP1-100 turbine with metastable, supersaturated expansions  

SciTech Connect

INEL`s Heat Cycle Research project continues to develop a technology base for increasing use of moderate-temperature hydrothermal resources to generate electrical power. One concept is the use of metastable, supersaturated turbine expansions. These expansions support a supersaturated working fluid vapor; at equilibrium conditions, liquid condensate would be present during the turbine expansion process. Studies suggest that if these expansions do not adversely affect the turbine performance, up to 8-10% more power could be produced from a given geothermal fluid. Determining the impact of these expansions on turbine performance is the focus of the project investigations being reported.

Mines, G.L.

1996-01-01T23:59:59.000Z

363

Power supply expansion and the nuclear option in Poland  

SciTech Connect

Poland is in the process of liberalizing and modernizing its electric power system. Given its heavy reliance on coal and a consequent history of often severe environmental externalities associated with power production, the nature of capacity expansion in Poland has important environmental and social implications. To better understand capacity expansion in Poland, we constructed a data set of the Polish power sector for use with the Elfin capacity expansion planning model. Using Elfin, we derived four scenarios and several sensitivities for new generating capacity construction. These scenarios simulate choices among several generic generating technologies made to achieve the lowest overall net present cost of operating the power system through 2015. We find that natural gas is a highly desirable fuel for future power generation in Poland, but primarily as a peaking resource. As the current system is inflexible and peaking capacity appears to be the most pressing need, this result is not surprising. However, when nuclear power is included as a generation option, natural gas is less desirable than the Polish Power Grid Company (PPGCo) has suggested, and, despite the PPGCo`s claims to the contrary, nuclear power cannot be ruled out in Poland on economic grounds alone. In the unconstrained Elfin scenarios, using PPGCo assumptions, nuclear power is attractive, especially after 2010. The attractiveness of nuclear generation proves sensitive to certain input variables, however, notably fixed operating and maintenance cost, and possible carbon taxes. Moreover, we find that the effectiveness of conservation efforts designed to reduce airborne emissions is limited under scenarios in which nuclear generation is adopted. 23 refs., 11 figs., 5 tabs.

Marnay, C.; Pickle, S.

1997-06-01T23:59:59.000Z

364

Definition: Dynamic Interchange Schedule Or Dynamic Schedule | Open Energy  

Open Energy Info (EERE)

Schedule Or Dynamic Schedule Schedule Or Dynamic Schedule Jump to: navigation, search Dictionary.png Dynamic Interchange Schedule Or Dynamic Schedule A telemetered reading or value that is updated in real time and used as a schedule in the AGC/ACE equation and the integrated value of which is treated as a schedule for interchange accounting purposes. Commonly used for scheduling jointly owned generation to or from another Balancing Authority Area.[1] Related Terms balancing authority, balancing authority area, smart grid References ↑ Glossary of Terms Used in Reliability Standards An in LikeLike UnlikeLike You like this.Sign Up to see what your friends like. line Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Dynamic_Interchange_Schedule_Or_Dynamic_Schedule&oldid=502492

365

Energy Infrastructure Events and Expansions Infrastructure Security and Energy Restoration  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Year-in-Review: 2010 Year-in-Review: 2010 Energy Infrastructure Events and Expansions Infrastructure Security and Energy Restoration Office of Electricity Delivery and Energy Reliability U.S. Department of Energy August 2011 OE/ISER Report 8/31/11 i For Further Information This report was prepared by the Office of Electricity Delivery and Energy Reliability under the direction of Patricia Hoffman, Assistant Secretary, and William Bryan, Deputy Assistant Secretary. Specific questions about information in this report may be directed to Alice Lippert, Senior Technical Advisor (alice.lippert@hq.doe.gov). Contributors include Mindi Farber-DeAnda, Robert Laramey, Carleen Lewandowski, Max

366

Making the most of Taylor expansion and imaginary chemical potential  

E-Print Network (OSTI)

We present preliminary results for the curvature of the pseudocritical line and susceptibilities in Nf = 2 + 1 flavor QCD. The computations are carried out on lattice sizes of 16x16x16x4, at matching parameters of early work of the Bielefeld group. Emphasis is placed on the control of systematic errors, by cross-validating results obtained by use of the Taylor expansion and measurements at imaginary chemical potential. To this end, we generalize the magnetic equation of state to the analysis of the number density, and we extend it to imaginary values of the chemical potential.

E. Laermann; F. Meyer; M. P. Lombardo

2013-04-11T23:59:59.000Z

367

Long-time protein folding dynamics from short-time molecular dynamics simulations  

E-Print Network (OSTI)

histogram analysis method (WHAM) [25, 8] and is shown inexchange simulation by WHAM with corresponding uncertaintiesat 302K, as determined by WHAM, and assigning ini- tial

Chodera, J D; Swope, W C; Pitera, J W; Dill, Ken A

2006-01-01T23:59:59.000Z

368

Clean Energy Alliance Expansion Continues http://www.mmdnewswire.com/pdf-86054/clean-energy-alliance-expansion-continues.pdf[2/3/2012 12:13:14 PM  

E-Print Network (OSTI)

-expansion-continues.pdf[2/3/2012 12:13:14 PM] Clean Energy Alliance Expansion Continues UCSD and Chicago Members Expand CEA's Geographic Reach Golden, CO (MMD Newswire) February 1, 2012 -- Clean Energy Alliance, Inc. (CEA in the Department of Energy Small Business and Clean Energy Alliance Partnership that is managed by CEA. "CEA

Fainman, Yeshaiahu

369

Randomized discrepancy bounded local search for transmission expansion planning  

SciTech Connect

In recent years the transmission network expansion planning problem (TNEP) has become increasingly complex. As the TNEP is a non-linear and non-convex optimization problem, researchers have traditionally focused on approximate models of power flows to solve the TNEP. Existing approaches are often tightly coupled to the approximation choice. Until recently these approximations have produced results that are straight-forward to adapt to the more complex (real) problem. However, the power grid is evolving towards a state where the adaptations are no longer easy (e.g. large amounts of limited control, renewable generation) and necessitates new approaches. Recent work on deterministic Discrepancy Bounded Local Search (DBLS) has shown it to be quite effective in addressing this question. DBLS encapsulates the complexity of power flow modeling in a black box that may be queried for information about the quality of proposed expansions. In this paper, we propose a randomization strategy that builds on DBLS and dramatically increases the computational efficiency of the algorithm.

Bent, Russell W [Los Alamos National Laboratory; Daniel, William B [Los Alamos National Laboratory

2010-11-23T23:59:59.000Z

370

Aussie LNG players target NE Asia in expansion bid  

SciTech Connect

Australia's natural gas players, keen to increase their presence in world liquefied natural gas trade, see Asia as their major LNG market in the decades to come. That's despite the fact that two spot cargoes of Australian Northwest Shelf LNG were shipped to Europe during the last 12 months and more are likely in 1994. Opportunities for growth are foreseen within the confines of the existing Northwest Shelf gas project for the rest of the 1990s. But the main focus for potential new grassroots project developers and expansions of the existing LNG plant in Australia is the expected shortfall in contract volumes of LNG to Japan, South Korea, and Taiwan during 2000--2010. Traditionally the price of crude oil has been used as a basis for calculating LNG prices. This means the economics of any new 21st century supply arrangements are delicately poised because of the current low world oil prices, a trend the market believes is likely to continue. In a bid to lessen the effect of high initial capital outlays and still meet projected demand using LNG from new projects and expansion of the existing plant, Australia's gas producers are working toward greater cooperation with prospective Asian buyers.

Not Available

1994-02-28T23:59:59.000Z

371

Feasibility of wavelet expansion methods to treat the energy variable  

Science Conference Proceedings (OSTI)

This paper discusses the use of the Discrete Wavelet Transform (DWT) to implement a functional expansion of the energy variable in neutron transport. The motivation of the work is to investigate the possibility of adapting the expansion level of the neutron flux in a material region to the complexity of the cross section in that region. If such an adaptive treatment is possible, 'simple' material regions (e.g., moderator regions) require little effort, while a detailed treatment is used for 'complex' regions (e.g., fuel regions). Our investigations show that in fact adaptivity cannot be achieved. The most fundamental reason is that in a multi-region system, the energy dependence of the cross section in a material region does not imply that the neutron flux in that region has a similar energy dependence. If it is chosen to sacrifice adaptivity, then the DWT method can be very accurate, but the complexity of such a method is higher than that of an equivalent hyper-fine group calculation. The conclusion is thus that, unfortunately, the DWT approach is not very practical. (authors)

Van Rooijen, W. F. G. [Research Inst. of Nuclear Engineering, Univ. of Fukui, Kanawa-cho 1-2-4, 914-0055, Fukui-ken, Tsuruga-shi (Japan)

2012-07-01T23:59:59.000Z

372

Expansion joint for guideway for magnetic levitation transportation system  

DOE Patents (OSTI)

An expansion joint that allows a guideway of a magnetic levitation transportation system to expand and contract while minimizing transients occurring in the magnetic lift and drag forces acting on a magnetic levitation vehicle traveling over the joint includes an upper cut or recess extending downwardly from the upper surface of the guideway and a non-intersecting lower cut or recess that extends upwardly from the lower surface of the guideway. The sidewalls of the cuts can be parallel to each other and the vertical axis of the guideway; the depth of the lower cut can be greater than the depth of the upper cut; and the overall combined lengths of the cuts can be greater than the thickness of the guideway from the upper to lower surface so that the cuts will overlap, but be spaced apart from each other. The distance between the cuts can be determined on the basis of the force transients and the mechanical behavior of the guideway. A second pair of similarly configured upper and lower cuts may be disposed in the guideway; the expansion joint may consist of two upper cuts and one lower cut; or the cuts may have non-parallel, diverging sidewalls so that the cuts have a substantially dove-tail shape.

Rossing, Thomas D. (DeKalb, IL)

1993-01-01T23:59:59.000Z

373

Expansion joint for guideway for magnetic levitation transportation system  

DOE Patents (OSTI)

An expansion joint that allows a guideway of a magnetic levitation transportation system to expand and contract while minimizing transients occurring in the magnetic lift and drag forces acting on a magnetic levitation vehicle traveling over the joint includes an upper cut or recess extending downwardly from the upper surface of the guideway and a non-intersecting lower cut or recess that extends upwardly from the lower surface of the guideway. The side walls of the cuts can be parallel to each other and the vertical axis of the guideway; the depth of the lower cut can be greater than the depth of the upper cut; and the overall combined lengths of the cuts can be greater than the thickness of the guideway from the upper to lower surface so that the cuts will overlap, but be spaced apart from each other. The distance between the cuts can be determined on the basis of the force transients and the mechanical behavior of the guideway. A second pair of similarly configured upper and lower cuts may be disposed in the guideway; the expansion joint may consist of two upper cuts and one lower cut; or the cuts may have non-parallel, diverging side walls so that the cuts have a substantially dove-tail shape.

Rossing, T.D.

1993-02-09T23:59:59.000Z

374

Multipole expansions and Fock symmetry of the Hydrogen atom  

E-Print Network (OSTI)

The main difficulty in utilizing the O(4) symmetry of the Hydrogen atom in practical calculations is the dependence of the Fock stereographic projection on energy. This is due to the fact that the wave functions of the states with different energies are proportional to the hyperspherical harmonics (HSH) corresponding to different points on the hypersphere. Thus, the calculation of the matrix elements reduces to the problem of re-expanding HSH in terms of HSH depending on different points on the hypersphere. We solve this problem by applying the technique of multipole expansions for four-dimensional HSH. As a result, we obtain the multipole expansions whose coefficients are the matrix elements of the boost operator taken between hydrogen wave functions (i.e. hydrogen form-factors). The explicit expressions for those coefficients are derived. It is shown that the hydrogen matrix elements can be presented as derivatives of an elementary function. Such an operator representation is convenient for the derivation of recurrency relations connecting matrix elements between states corresponding to different values of the quantum numbers $n$ and $l$.

A. V. Meremianin; J-M. Rost

2006-06-27T23:59:59.000Z

375

Expansion joint for guideway for magnetic levitation transportation system  

DOE Patents (OSTI)

An expansion joint that allows a guideway of a magnetic levitation transportation system to expand and contract while minimizing transients occurring in the magnetic lift and drag forces acting on a magnetic levitation vehicle traveling over the joint includes an upper cut or recess extending downwardly from the upper surface of the guideway and a non-intersecting lower cut or recess that extends upwardly from the lower surface of the guideway. The sidewalls of the cuts can be parallel to each other and the vertical axis of the guideway; the depth of the lower cut can be greater than the depth of the upper cut; and the overall combined lengths of the cuts can be greater than the thickness of the guideway from the upper to lower surface so that the cuts will overlap, but be spaced apart from each other. The distance between the cuts can be determined on the basis of the force transients and the mechanical behavior of the guideway. A second pair of similarly configured upper and lower cuts may be disposed in the guideway; the expansion joint may consist of two upper cuts and one lower cut; or the cuts may have non-parallel, diverging sidewalls so that the cuts have a substantially dove-tail shape.

Rossing, T.D.

1991-12-31T23:59:59.000Z

376

Study on Preventing Volume Expansion of Amorphous Si/Sn ...  

Science Conference Proceedings (OSTI)

A21: First-Principles Molecular Dynamics Simulation of Chemical ... A3: Investigation on Co-combustion Kinetics of Anthracite Coal and Biomass Char by ... Lithium Redox Process for Thermochemical Water-Splitting as Energy Conversion.

377

Cosmic expansion and growth histories in Galileon scalar-tensor models of dark energy  

E-Print Network (OSTI)

We study models of late-time cosmic acceleration in terms of scalar-tensor theories generalized to include a certain class of non-linear derivative interaction of the scalar field. The non-linear effect suppress the scalar-mediated force at short distances to pass solar-system tests of gravity. It is found that the expansion history until today is almost indistinguishable from that of the $\\Lambda$CDM model or some (phantom) dark energy models, but the fate of the universe depends clearly on the model parameter. The growth index of matter density perturbations is computed to show that its past asymptotic value is given by 9/16, while the value today is as small as 0.4.

Kobayashi, Tsutomu

2010-01-01T23:59:59.000Z

378

Cosmic expansion and growth histories in Galileon scalar-tensor models of dark energy  

E-Print Network (OSTI)

We study models of late-time cosmic acceleration in terms of scalar-tensor theories generalized to include a certain class of non-linear derivative interaction of the scalar field. The non-linear effect suppress the scalar-mediated force at short distances to pass solar-system tests of gravity. It is found that the expansion history until today is almost indistinguishable from that of the $\\Lambda$CDM model or some (phantom) dark energy models, but the fate of the universe depends clearly on the model parameter. The growth index of matter density perturbations is computed to show that its past asymptotic value is given by 9/16, while the value today is as small as 0.4.

Tsutomu Kobayashi

2010-03-17T23:59:59.000Z

379

Shock creation and particle acceleration driven by plasma expansion into a rarefied medium  

Science Conference Proceedings (OSTI)

The expansion of a dense plasma through a more rarefied ionized medium is a phenomenon of interest in various physics environments ranging from astrophysics to high energy density laser-matter laboratory experiments. Here this situation is modeled via a one-dimensional particle-in-cell simulation; a jump in the plasma density of a factor of 100 is introduced in the middle of an otherwise equally dense electron-proton plasma with an uniform proton and electron temperature of 10 eV and 1 keV, respectively. The diffusion of the dense plasma, through the rarefied one, triggers the onset of different nonlinear phenomena such as a strong ion-acoustic shock wave and a rarefaction wave. Secondary structures are detected, some of which are driven by a drift instability of the rarefaction wave. Efficient proton acceleration occurs ahead of the shock, bringing the maximum proton velocity up to 60 times the initial ion thermal speed.

Sarri, G.; Kourakis, I.; Borghesi, M. [Centre for Plasma Physics, The Queen's University of Belfast, Belfast BT7 1NN (United Kingdom); Dieckmann, M. E. [VITA ITN, Linkoping University, 60174 Norrkoping (Sweden)

2010-08-15T23:59:59.000Z

380

Three dimensional massive scalar field theory and the derivative expansion of the renormalization group  

E-Print Network (OSTI)

We show that non-perturbative fixed points of the exact renormalization group, their perturbations and corresponding massive field theories can all be determined directly in the continuum -- without using bare actions or any tuning procedure. As an example, we estimate the universal couplings of the non-perturbative three-dimensional one-component massive scalar field theory in the Ising model universality class, by using a derivative expansion (and no other approximation). These are compared to the recent results from other methods. At order derivative-squared approximation, the four-point coupling at zero momentum is better determined by other methods, but factoring this out appropriately, all our other results are in very close agreement with the most powerful of these methods. In addition we provide for the first time, estimates of the n-point couplings at zero momentum, with n=12,14, and the order momentum-squared parts with n=2 ... 10.

Tim R. Morris

1996-12-11T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Surface Chemical Dynamics  

NLE Websites -- All DOE Office Websites (Extended Search)

Surface Chemical Dynamics Surface Chemical Dynamics The goal of the Surface Chemical Dynamics Program is to elucidate the underlying physical processes that determine the products (selectivity) and yield (efficiency) of chemical transformations relevant to energy-related chemistry on catalytic and nanostructured surfaces. Achieving this end requires understanding the evolution of the reactant-molecule/surface complex as molecules adsorb, bonds dissociate, surface species diffuse, new bonds form and products desorb. The pathways and time scales of these processes are ultimately determined by a multidimensional potential energy surface that is a function of the geometric and electronic structures of the surface and the reactant, product, intermediate and transition-state molecular and atomic species.

382

FAST: Frequency-aware static timing analysis  

Science Conference Proceedings (OSTI)

Energy is a valuable resource in embedded systems as the lifetime of many such systems is constrained by their battery capacity. Recent advances in processor design have added support for dynamic frequency/voltage scaling (DVS) for saving energy. Recent ... Keywords: Real-time systems, dynamic voltage scaling, scheduling, worst-case execution time analysis

Kiran Seth; Aravindh Anantaraman; Frank Mueller; Eric Rotenberg

2006-02-01T23:59:59.000Z

383

TIMING APPARATUS  

DOE Patents (OSTI)

The timing device comprises an escapement wheel and pallet, a spring drive to rotate the escapement wheel to a zero position, means to wind the pretensioned spring proportional to the desired signal time, and a cam mechanism to control an electrical signal switch by energizing the switch when the spring has been wound to the desired position, and deenergizing it when it reaches the zero position. This device produces an accurately timed signal variably witain the control of the operator.

Bennett, A.E.; Geisow, J.C.H.

1956-04-17T23:59:59.000Z

384

The Coefficient of Thermal Expansion in PBX 9502  

Office of Scientific and Technical Information (OSTI)

LA-14003 LA-14003 Approved for public release; distribution is unlimited. The Elusive Coefficients of Thermal Expansion in PBX 9502 Editing by Belinda K. Haag, IM-1 Illustrations by J. Phil Putnam, IM-1 Cover Photo: Stacked sheets of TATB exposed by fracture in a consolidated PBX 9502 component. Los Alamos National Laboratory, an affirmative action/ equal opportunity employer, is operated by the University of California for the National Nuclear Security Administration of the US Department of Energy under contract W-7405-ENG-36. This work was prepared as an account of work sponsored by an agency of the United States Government. Neither the Regents of the University of California, the United States Government nor

385

Microsoft Word - Forest Grove Expansion I CX.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

, 2011 , 2011 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Amit Sinha - TEP-CSB-2 Proposed Action: Forest Grove Substation Expansion Budget Information: Work Order # 255319 Task 03 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021: B4.6 "Additions or modifications to electric power transmission facilities..." Location: Washington County, OR - Section 32, Township 1 North, Range 3 West of the Forest Grove Quadrangle Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA is proposing to expand Forest Grove Substation located in Washington County, OR. The purpose of this project is to improve load service and reliability within the Portland vicinity as per the NERC reliability standards. Within the existing Forest Grove Substation, the

386

Extensive expansion at Karsto gas plant under way  

SciTech Connect

By 2000, the gas and condensate plant at Karsto, Norway, will have been expanded extensively: gas-processing capacity will increase to 2.2 bscfd from current 775 MMscfd; and production capacity for LPG, naphtha, and condensate will reach approximately 10 million metric tons/year (mty). Prompting this expansion is the landing of Karsto in 2000 of a 42-in., rich-gas pipeline from Haltenbanken, offshore mid-Norway, and installation of the 42-in. Europipe II dry-gas pipeline from Karsto to Germany. In the same period, several spin-off projects adding value to the overall concept may be constructed. These could include a 350-mw power plant and ethane-shipment facilities. Total investment at Karsto in the next 3--4 years will reach approximately $1.1 billion (US). Civil work began in June 1997; the detail engineering contract was awarded in August 1997. The paper describes the project.

Svenes, S. [Den Norske Stats Oljeselskap AS, Haugesund (Norway)

1998-07-27T23:59:59.000Z

387

Microsoft Word - CX -Ostrander Substation Expansion.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6, 2011 6, 2011 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Amit Sinha Project Manager - TEP-CSB-2 Proposed Action: Ostrander Substation Addition Budget Information: Work order 00262568 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.11 Construction of electric power substations (including switching stations and support facilities)....or modification (other than voltage increases) of existing substations and support facilities... Location: Clackamas County, Oregon (T2S, R3E, Sections 26 and 35) Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA is proposing to expand its existing Ostrander Substation near Barton, Oregon by approximately 4 acres. The expansion would accommodate three new 230/500-kV transformers,

388

Ultra low thermal expansion, highly thermal shock resistant ceramic  

DOE Patents (OSTI)

Three families of ceramic compositions having the given formula: .phi..sub.1+X Zr.sub.4 P.sub.6-2X Si.sub.2X O.sub.24, .phi..sub.1+X Zr.sub.4-2X Y.sub.2X P.sub.6 O.sub.24 and .phi..sub.1+X Zr.sub.4-X Y.sub.X P.sub.6-2X Si.sub.X O.sub.24 wherein .phi. is either Strontium or Barium and X has a value from about 0.2 to about 0.8 have been disclosed. Ceramics formed from these compositions exhibit very low, generally near neutral, thermal expansion over a wide range of elevated temperatures.

Limaye, Santosh Y. (1440 Sandpiper Cir. #38, Salt Lake City, UT 84117)

1996-01-01T23:59:59.000Z

389

Ultra low thermal expansion, highly thermal shock resistant ceramic  

DOE Patents (OSTI)

Three families of ceramic compositions having the given formula: {phi}{sub 1+X}Zr{sub 4}P{sub 6{minus}2X}Si{sub 2X}O{sub 24}, {phi}{sub 1+X}Zr{sub 4{minus}2X}Y{sub 2X}P{sub 6}O{sub 24} and {phi}{sub 1+X}Zr{sub 4{minus}X}Y{sub X}P{sub 6{minus}2X}Si{sub X}O{sub 24} wherein {phi} is either strontium or barium and X has a value from about 0.2 to about 0.8 have been disclosed. Ceramics formed from these compositions exhibit very low, generally near neutral, thermal expansion over a wide range of elevated temperatures. 7 figs.

Limaye, S.Y.

1996-01-30T23:59:59.000Z

390

TEST METHOD FOR COEFFICIENT OF LINEAR THERMAL EXPANSION OF CONCRETE  

E-Print Network (OSTI)

1.1 This method covers the determination of the coefficient of linear thermal expansion of concrete test specimens by determinations of length change due to temperature changes. Because the thermal coefficient of concrete varies with moisture condition, being a minimum when saturated or oven dry and a maximum at about 70 percent saturated, it is important to select the relevant moisture condition for the tests to be made. 2. Apparatus 2.1. The apparatus shall consist of: 2.1.1 Heating Bath- A water bath in which concrete specimens can be maintained at a temperature of 140 ± 2 F (60 ± 1.1 C) (Note 1) 2.1.2 Cooling Bath- A water bath in which

unknown authors

1981-01-01T23:59:59.000Z

391

Three-body hyperspherical method with infinite angular expansions  

Science Conference Proceedings (OSTI)

The hyperspherical method based on infinite angular expansions is introduced. We approximate the cusp behavior of a wave function using B-spline techniques. Calculations for the ground-state energies of the atomic helium and the e{sup +}Li system are presented as two examples for testing this method. The computed ground-state energy of He is -2.903 724 a.u. with single particle orbitals l{sub max}=8. For the e{sup +}Li system, with l{sub max}=9, the ground-state energy is -0.250 83 a.u., which is better than the configuration interaction result of -0.250 107 82 a.u. with l{sub max}=30.

Han Huili; Tang Liyan; Shi Tingyun [State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China)

2011-12-15T23:59:59.000Z

392

Momentum Scale Expansion of Sharp Cutoff Flow Equations  

E-Print Network (OSTI)

We show how the exact renormalization group for the effective action with a sharp momentum cutoff, may be organised by expanding one-particle irreducible parts in terms of homogeneous functions of momenta of integer degree (Taylor expansions not being possible). A systematic series of approximations -- the $O(p^M)$ approximations -- result from discarding from these parts, all terms of higher than the $M^{\\rm th}$ degree. These approximations preserve a field reparametrization invariance, ensuring that the field's anomalous dimension is unambiguously determined. The lowest order approximation coincides with the local potential approximation to the Wegner-Houghton equations. We discuss the practical difficulties with extending the approximation beyond $O(p^0)$.

Tim R. Morris

1995-08-04T23:59:59.000Z

393

HAZARDS OF THERMAL EXPANSION FOR RADIOLOGICAL CONTAINER ENGULFED IN FIRE  

SciTech Connect

Fire accidents pose a serious threat to nuclear facilities. It is imperative that transport casks or shielded containers designed to transport/contain radiological materials have the ability to withstand a hypothetical fire. A numerical simulation was performed for a shielded container constructed of stainless steel and lead engulfed in a hypothetical fire as outlined by 10 CFR §71.73. The purpose of this analysis was to determine the thermal response of the container during and after the fire. The thermal model shows that after 30 minutes of fire, the stainless steel will maintain its integrity and not melt. However, the lead shielding will melt since its temperature exceeds the melting point. Due to the method of construction of the container under consideration, ample void space must be provided to allow for thermal expansion of the lead upon heating and melting, so as to not overstress the weldment.

Donna Post Guillen

2013-05-01T23:59:59.000Z

394

Characterization of carbon fibers: coefficient of thermal expansion and microstructure  

E-Print Network (OSTI)

The focus of the research is to develop a consistent and repeatable method to evaluate the coefficient of thermal expansion (CTE) of carbon fibers at high temperatures. Accurate measurement of the CTE of carbon fibers is essential to understand and develop optimal processing procedures as well as computational simulations to predict properties and allowables for fiber-reinforced composites. The mismatch between the coefficient of thermal expansion of the fiber and the matrix has a profound impact on the development of residual stresses and the subsequent damage initiation and progression, potentially diminishing the performance of composite structures. In situ transmission electron microscopy (TEM) is selected to perform the experimental work on account of the high resolution and the capability of evaluating both the longitudinal and transverse CTE. The orthotropy in the CTE is tested by rotating the fibers through 45° about their axis. The method is validated by testing standard tungsten filaments of known CTE. Additionally, the microstructure of the fibers is studied in a field emission scanning electron microscope as well as through selected area diffraction patterns in a TEM to observe presence of any potential orthotropy. The pitch based P55 fiber revealed a cylindrically orthotropic microstructure, but the PAN based IM7 and T1000 fibers did not reveal any orthotropy. Finite element models of hexagonally arranged IM7 fibers in a 977 epoxy matrix are developed using PATRAN and analyzed using the commercial FEA code ABAQUS 6.4. The fiber properties were considered temperature independent where as the matrix properties were varied linearly with temperature. The lamina properties evaluated from the finite element modeling are in agreement with the experimental results in literature within 10% in the temperature range of room temperature to the stress free temperature of the epoxy, however at cryogenic temperatures the difference is greater. The residual stresses developed during processing of the composite indicated a potential location for fiber matrix debonding to be in the matrix dominant regions.

Kulkarni, Raghav Shrikant

2004-12-01T23:59:59.000Z

395

Year-in-Review: 2012 Energy Infrastructure Events and Expansions (July  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Year-in-Review: 2012 Energy Infrastructure Events and Expansions Year-in-Review: 2012 Energy Infrastructure Events and Expansions (July 2013) Year-in-Review: 2012 Energy Infrastructure Events and Expansions (July 2013) The Year-in-Review (YIR): 2012 Energy Infrastructure Events and Expansions report provides a summary of significant energy disruptions and infrastructure changes that occurred in the United States throughout 2012. The focus is on the United States, but international events that impacted the United States are also reported. The 2012 YIR is based primarily on information reported in the Energy Assurance Daily (EAD) between January 1, 2012 and December 31, 2012. Year-in-Review: 2012 Energy Infrastructure Events and Expansions More Documents & Publications Energy Infrastructure Events and Expansions Year-in-Review 2011

396

Developing the model of laser ablation by considering the interplay between emission and expansion of aluminum plasma  

SciTech Connect

In the present study, the ablation behavior of aluminum target and its plasma radiation in noble ambient gases by a laser pulse with wavelength of 266 nm and pulse duration of 10 ns are numerically studied. A thermal model of laser ablation considering heat conduction, Euler equations, Saha-Eggert equations, Knudsen layer, mass and energy balance relations and optical shielding effects are used for calculation of plasma parameters. Effects of excitation energy on plasma expansion and its emissivity are investigated. Time and spatial-resolved plasma emission including bremsstrahlung, recombination and spectral emission at early delay times after laser irradiation is obtained. Effects of two ambient gases (He and Ar) as well as different gas pressures of 100, 300, 500, and 760 Torr on plasma expansion and its spectrum are studied. Results illustrate that at initial delay times, especially at high noble gas pressures, ionic lines have the maximum intensities, while at later times neutral lines dominate. When the pressure of ambient gas increases, a confinement of the plasma plume is predicted and the intensity of neutral lines decreases. Continuous emission increases with wavelength in both ambient gases. Spatially resolved analysis shows that an intense continuous emission is predicted next to the sample surface decreasing with distance from the latter.

Rezaei, F.; Tavassoli, S. H. [Laser and Plasma Research Institute, ShahidBeheshti University, 19396 4716, G. C., Evin, Tehran (Iran, Islamic Republic of)

2013-01-15T23:59:59.000Z

397

Efficiency Benefits of EHV AC Transmission and Overlays in Interregional Transmission Expansion Planning  

Science Conference Proceedings (OSTI)

In the United States, transmission expansion planning historically focused on addressing local utility transmission needs. In the mid-to-late 1990s, the focus shifted to encompass regional transmission expansion, primarily driven by Federal Energy Regulatory Commission (FERC) mandates on open transmission access and emergence of regional transmission organizations. In recent years, three drivers have elevated transmission expansion planning to a higher, interregional level. These drivers are the ...

2012-11-29T23:59:59.000Z

398

HEAVY BARYONS: A COMBINED LARGE Nc AND HEAVY QUARK EXPANSION FOR ELECTROWEAK CURRENTS  

E-Print Network (OSTI)

The combined large Nc and heavy quark limit for baryons containing a single heavy quark is discussed. The combined large Nc and heavy quark expansion of the heavy quark bilinear operators is obtained. In the combined expansion the corrections proportional to mN/mQ are summed to all orders. In particular, the combined expansion can be used to determine semileptonic form factors of heavy baryons in the combined limit. 1

Boris A. Gelman

2002-01-01T23:59:59.000Z

399

Comparison of experimental and computed solids motion and bed dynamics for fluidized beds containing obstacles  

SciTech Connect

The ensemble- and time-averaged solids velocity field and bed dynamics in the form of pressure oscillations taken in the University of Illinois at Urbana-Champaign's (UIUC) atmospheric thin (3.81 by 40 cm) bubbling fluidized bed which contained a simulated triangular pitch tube array consisting of five round 5.08 cm diameter cylinders are analyzed in this paper using Argonne National Laboratory's hydrodynamic model FLUFIX implemented on its CRAY-XMP supercomputer. The bed material consisted of soda lime glass beads having a narrow size range averaging 460 {mu}m in diameter. The fluidizing air was introduced at 39 cm/s. Generally correct solids motion is predicted by the FLUFIX computer program. The uncertainties in the UIUC solids motion data vary greatly from location to location; hence, a sensitivity analysis was performed varying the inlet fluidizing gas velocity distribution. A convergence study was performed by varying (1) the size of the mesh used to approximate the obstacles, and (2) the accuracy of the numerical solution. The authors demonstrate essential grid independence for time-averaged axial solids velocities and porosities for the tubes modeled as 2 {times} 2 and 4 {times} 4 squares and a very tight convergence. Good agreement is obtained for the power spectra of the absolute pressure fluctuations using the Fast Fourier Transform (FFT) technique. The computed and experimental major frequencies lie in a relatively narrow range of 2-3 Hz. Computer animations of the computer simulations qualitatively visualize features of the bed dynamics including bubble formation from the tubes, bed expansion and collapse and side-to-side sloshing. Solids motion and the associated bed dynamics are the key to understanding the erosion processes in fluidized-bed combustors. 7 refs., 12 figs., 3 tabs.

Lyczkowski, R.W.; Gamwo, I.K.; Dobran, F. (Argonne National Lab., IL (USA)); Ai, Y.H.; Chao, B.T.; Chen, M.M. (Illinois Univ., Urbana, IL (USA). Dept. of Mechanical and Industrial Engineering)

1991-01-01T23:59:59.000Z

400

Dynamic radioactive particle source  

SciTech Connect

A method and apparatus for providing a timed, synchronized dynamic alpha or beta particle source for testing the response of continuous air monitors (CAMs) for airborne alpha or beta emitters is provided. The method includes providing a radioactive source; placing the radioactive source inside the detection volume of a CAM; and introducing an alpha or beta-emitting isotope while the CAM is in a normal functioning mode.

Moore, Murray E.; Gauss, Adam Benjamin; Justus, Alan Lawrence

2012-06-26T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Retreat of the state and the market: liberalisation and education expansion in Sudan under the NCP.  

E-Print Network (OSTI)

??This thesis is an analysis of two concurrent processes - the liberalisation of the economy and the expansion of the tertiary education system - by… (more)

Mann, Laura Elizabeth

2012-01-01T23:59:59.000Z

402

Resonant holographic measurements of laser ablation plume expansion in vacuum and argon gas backgrounds  

Science Conference Proceedings (OSTI)

This thesis discusses the following on resonant holographic measurements of laser ablation plume expansion: Introduction to laser ablation; applications of laser ablation; The study of plume expansion; holographic interferometry; resonant holographic interferometry; accounting for finite laser bandwidth; The solution for doppler broadening and finite bandwidth; the main optical table; the lumonics laser spot shape; developing and reconstructing the holograms; plume expansion in RF/Plasma Environments; Determining {lambda}{sub o}; resonant refraction effects; fringe shift interpretation; shot-to-shot consistency; laser ablation in vacuum and low pressure, inert, background gas; theoretically modeling plume expansion in vacuum and low pressure, inert, background gas; and laser ablation in higher pressure, inert, background gas.

Lindley, R.A. [Michigan Univ., Ann Arbor, MI (United States)

1993-10-01T23:59:59.000Z

403

Rapid ontogenetic niche expansions in invasive Chinese tallow tree permit establishment in  

E-Print Network (OSTI)

Rapid ontogenetic niche expansions in invasive Chinese tallow tree permit establishment and poorly understood. Chinese tallow tree Triadica sebifera is a major invader demonstrating broad variation

Siemann, Evan

404

A very rapidly convergent product expansion for π - CECM  

E-Print Network (OSTI)

BIT23 (1983), 538-540. SCIENTIFIC NOTES. A VERY RAPIDLY CONVERGENT PRODUCT. EXPANSION FOR rc. J. M. BORWEIN and P. B. BORWEIN.

405

Query Expansion Research and Application in Search Engine Based on Concepts Lattice.  

E-Print Network (OSTI)

??Formal concept analysis is increasingly applied to query expansion and data mining problems. In this paper I analyze and compare the current concept lattice construction… (more)

Cui, Jun

2009-01-01T23:59:59.000Z

406

Carbon and Nitrogen Dynamics in Agricultural Soils  

E-Print Network (OSTI)

Carbon and Nitrogen Dynamics in Agricultural Soils Model Applications at Different Scales in Time Print: SLU Service/Repro, Uppsala 2012 #12;Carbon and Nitrogen Dynamics in Agricultural Soils. Model Applications at Different Scales in Time and Space Abstract An understanding of soil organic carbon (C

407

How Fluids Bend: the Elastic Expansion for Higher-Dimensional Black Holes  

E-Print Network (OSTI)

Hydrodynamics can be consistently formulated on surfaces of arbitrary co-dimension in a background space-time, providing the effective theory describing long-wavelength perturbations of black branes. When the co-dimension is non-zero, the system acquires fluid-elastic properties and constitutes what is called a fluid brane. Applying an effective action approach, the most general form of the free energy quadratic in the extrinsic curvature and extrinsic twist potential of stationary fluid brane configurations is constructed to second order in a derivative expansion. This construction generalizes the Helfrich-Canham bending energy for fluid membranes studied in theoretical biology to the case in which the fluid is rotating. It is found that stationary fluid brane configurations are characterized by a set of 3 elastic response coefficients, 3 hydrodynamic response coefficients and 1 spin response coefficient for co-dimension greater than one. Moreover, the elastic degrees of freedom present in the system are coupled to the hydrodynamic degrees of freedom. For co-dimension-1 surfaces we find a 8 independent parameter family of stationary fluid branes. It is further shown that elastic and spin corrections to (non)-extremal brane effective actions can be accounted for by a multipole expansion of the stress-energy tensor, therefore establishing a relation between the different formalisms of Carter, Capovilla-Guven and Vasilic-Vojinovic and between gravity and the effective description of stationary fluid branes. Finally, it is shown that the Young modulus found in the literature for black branes falls into the class predicted by this approach - a relation which is then used to make a proposal for the second order effective action of stationary blackfolds and to find the corrected horizon angular velocity of thin black rings.

Jay Armas

2013-04-29T23:59:59.000Z

408

White food-type sorghum in direct-expansion extrusion applications  

E-Print Network (OSTI)

Whole sorghum kernels were directly processed into whole grain snacks with acceptable texture. Extrudates made from whole sorghum had a harder gritty texture than those made from decorticated materials. Extrusion of whole sorghum provides significant savings in processing: there are no dry matter losses; no equipment or energy is required for decortication or milling; the extruder consumes less power and processes more material per time unit. In addition, the extruder utilized is a simple adiabiatic, friction extruder of relatively low cost. Grinding whole sorghum and removing fines did not improve product expansion during extrusion but altered the gritty pieces in the extrudates. The best products were obtained when whole sorghum (ground or un-ground) was extruded at 14% moisture. The whole sorghum extrudates had larger bubbles with thick cell walls, which made extrudates more crunchy. Decortication of sorghum improved extrusion performance and products by allowing adequate formation and retention of air cells. Decortication to remove 20% of the original sorghum weight was enough to produce extrudates with characteristics comparable to those made from commercial yellow corn meal. Sorghum milled fractions with composition and particle size distribution similar to corn meal produced extrudates with higher expansion, lower bulk density and similar texture. In addition, sorghum extrudates were rated equal to corn meal extrudates by a taste panel for appearance, flavor, texture and overall characteristics. Extrudates made from polished rice were less expanded and whiter than extrudates made from sorghum. When processed under similar conditions, sorghum extrusion required more energy than corn meal extrusion. However, whole sorghum extrusion required less energy than corn meal extrusion. Unground sorghum samples (decorticated or non-decorticated) produced harder extrudates compared to those made from ground raw material. White sorghum is a feasible option for snack extrusion because of its versatility, product characteristics, cost and processing properties.

Acosta Sanchez, David

2003-12-01T23:59:59.000Z

409

Indirect cycle-time quantile estimation for non-FIFO dispatching policies  

Science Conference Proceedings (OSTI)

Previous work has shown that the Cornish-Fisher expansion (CFE) can be used successfully in conjunction with discrete event simulation models of manufacturing systems to estimate cycle-time quantiles. However, the accuracy of the approach degrades when ...

Jennifer McNeill Bekki; Gerald T. Mackulak; John W. Fowler

2006-12-01T23:59:59.000Z

410

Long-Lived Time-Dependent Remnants During Cosmological Symmetry Breaking: From Inflation to the Electroweak Scale  

E-Print Network (OSTI)

Through a detailed numerical investigation in three spatial dimensions, we demonstrate that long-lived time-dependent field configurations emerge dynamically during symmetry breaking in an expanding de Sitter spacetime. We investigate two situations: a single scalar field with a double-well potential and the bosonic sector of an SU(2) non-Abelian Higgs model. For the single scalar, we show that large-amplitude oscillon configurations emerge spontaneously and persist to contribute about 1.2% of the energy density of the universe. We also show that for a range of parameters, oscillon lifetimes are enhanced by the expansion and that this effect is a result of parametric resonance. For the SU(2) case, we see about 4% of the final energy density in oscillons.

Marcelo Gleiser; Noah Graham; Nikitas Stamatopoulos

2010-04-26T23:59:59.000Z

411

Long-lived time-dependent remnants during cosmological symmetry breaking: From inflation to the electroweak scale  

SciTech Connect

Through a detailed numerical investigation in three spatial dimensions, we demonstrate that long-lived time-dependent field configurations emerge dynamically during symmetry breaking in an expanding de Sitter spacetime. We investigate two situations: a single scalar field with a double-well potential and an SU(2) non-Abelian Higgs model. For the single scalar, we show that large-amplitude oscillon configurations emerge spontaneously and persist to contribute about 1.2% of the energy density of the Universe. We also show that for a range of parameters, oscillon lifetimes are enhanced by the expansion and that this effect is a result of parametric resonance. For the SU(2) case, we see about 4% of the final energy density in oscillons.

Gleiser, Marcelo; Stamatopoulos, Nikitas [Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire 03755 (United States); Graham, Noah [Department of Physics, Middlebury College, Middlebury, Vermont 05753 (United States)

2010-08-15T23:59:59.000Z

412

Dynamic tariffs  

SciTech Connect

The general theoretical models of dynamic tariffs, such as spot pricing, are extended in this paper to include the issues of optimal response of industrial consumers and the effect of large scale penetration of these tariffs on the utility load curve. If such tariffs are to serve their purpose consumers need to acquire the ability for flexible and dynamic response. While the hardware for this is readily available the theoretical models and software systems are not. These issues are examined and correlated with industrial site studies. A systematic analysis of the effect of significant consumer response on the system load curve is next undertaken. A methodologically sound approach to system load and price forecasting is presented.

David, A.K.; Lee, Y.C.

1989-08-01T23:59:59.000Z

413

Modeling data with multiple time dimensions  

Science Conference Proceedings (OSTI)

A large class of problems in time series analysis can be represented by a set of overlapping time series with different starting times. These time series may be treated as different probes of the same underlying process. Such probes may follow a characteristic ... Keywords: Dendrochronology, Douglas fir, Dual-time dynamics, El Malpais, Generalized additive models, Global climate change, Non-linear dynamics, Non-linear modeling, Pinon pine, Ponderosa pine, Portfolio forecasting, Retail lending, SETI@home, Scenario-based forecasting, Search for extraterrestrial intelligence, Time series, Tree rings

Joseph L. Breeden

2007-05-01T23:59:59.000Z

414

Expansion and Improvement of Solar Water Heating Technology in China  

Open Energy Info (EERE)

Improvement of Solar Water Heating Technology in China Improvement of Solar Water Heating Technology in China Project Management Office Jump to: navigation, search Name Expansion and Improvement of Solar Water Heating Technology in China Project Management Office Place Beijing, Beijing Municipality, China Zip 100038 Sector Buildings, Solar Product The programme focuses on the development of high-quality and attractive-looking model designs for integrating solar water heaters (SWH) into buildings in China. Coordinates 39.90601°, 116.387909° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.90601,"lon":116.387909,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

415

Project Fever - Fostering Electric Vehicle Expansion in the Rockies  

DOE Green Energy (OSTI)

Project FEVER (Fostering Electric Vehicle Expansion in the Rockies) is a part of the Clean Cities Community Readiness and Planning for Plug-in Electric Vehicles and Charging Infrastructure Funding Opportunity funded by the U.S. Department of Energy (DOE) for the state of Colorado. Tasks undertaken in this project include: Electric Vehicle Grid Impact Assessment; Assessment of Electrical Permitting and Inspection for EV/EVSE (electric vehicle/electric vehicle supply equipment); Assessment of Local Ordinances Pertaining to Installation of Publicly Available EVSE;Assessment of Building Codes for EVSE; EV Demand and Energy/Air Quality Impacts Assessment; State and Local Policy Assessment; EV Grid Impact Minimization Efforts; Unification and Streamlining of Electrical Permitting and Inspection for EV/EVSE; Development of BMP for Local EVSE Ordinances; Development of BMP for Building Codes Pertaining to EVSE; Development of Colorado-Specific Assessment for EV/EVSE Energy/Air Quality Impacts; Development of State and Local Policy Best Practices; Create Final EV/EVSE Readiness Plan; Develop Project Marketing and Communications Elements; Plan and Schedule In-person Education and Outreach Opportunities.

Swalnick, Natalia

2013-06-30T23:59:59.000Z

416

West Foster Creek Expansion Project 2007 HEP Report.  

DOE Green Energy (OSTI)

During April and May 2007, the Columbia Basin Fish and Wildlife Authority's (CBFWA) Regional HEP Team (RHT) conducted baseline Habitat Evaluation Procedures (HEP) (USFWS 1980, 1980a) analyses on five parcels collectively designated the West Foster Creek Expansion Project (3,756.48 acres). The purpose of the HEP analyses was to document extant habitat conditions and to determine how many baseline/protection habitat units (HUs) to credit Bonneville Power Administration (BPA) for funding maintenance and enhancement activities on project lands as partial mitigation for habitat losses associated with construction of Grand Coulee and Chief Joseph Dams. HEP evaluation models included mule deer (Odocoileus hemionus), western meadowlark (Sturnella neglecta), sharp-tailed grouse, (Tympanuchus phasianellus), Bobcat (Lynx rufus), mink (Neovison vison), mallard (Anas platyrhynchos), and black-capped chickadee (Parus atricapillus). Combined 2007 baseline HEP results show that 4,946.44 habitat units were generated on 3,756.48 acres (1.32 HUs per acre). HEP results/habitat conditions were generally similar for like cover types at all sites. Unlike crediting of habitat units (HUs) on other WDFW owned lands, Bonneville Power Administration received full credit for HUs generated on these sites.

Ashley, Paul R.

2008-02-01T23:59:59.000Z

417

Energy Prices and the Expansion of World Trade  

E-Print Network (OSTI)

The oil shocks of the 1970s coincided with a number of economic disturbances. However, it has been difficult to develop models where oil shocks have a quantitatively important impact on the economy. In this paper, I show that the disturbances in transportation caused by the oil shocks can significantly affect the economy. I argue that changes in energy prices were responsible for a worldwide slowdown in the growth of trade and may help explain the apparent change in the price-trade elasticity. While tariffs have fallen steadily since 1970, trade growth slowed in the mid-1970s and has grown rapidly since the mid-1980s. In a standard trade model, this pattern implies that the price-import elasticity increased sharply in the mid-1980s. In this paper, I argue that the oil crises of the 1970s led to higher transportation costs. In 1986 energy prices fell to their pre-crisis level, reducing transportation costs and by extension trade barriers. I present a trade model with an energy using transportation sector. In model simulations, I show that total trade costs (transportation cost plus tariffs) are constant from 1974 to 1982. Once transportation costs are accounted for, the price-import elasticity no longer needs to radically change. I also show that trade expansion since 1960 is 50 percent higher in a standard trade model that includes a transportation sector compared to one that does not.

Benjamin Bridgman

2008-01-01T23:59:59.000Z

418

Thermal Expansion Coefficient of Steels Used in LWR Vessels  

Science Conference Proceedings (OSTI)

Because of the impact that melt relocation and vessel failure have on subsequent progression and associated consequences of a Light Water Reactor (LWR) accident, it is important to accurately predict the heat-up and relocation of materials within the reactor vessel and heat transfer to and from the reactor vessel. Accurate predictions of such heat transfer phenomena require high temperature thermal properties. However, a review of vessel and structural steel material properties in severe accident analysis codes reveals that the required high temperature material properties are extrapolated with little, if any, data above 700ºC. To reduce uncertainties in predictions relying upon this extrapolated high temperature data, new thermal expansion data were obtained using pushrod dilatometry techniques for two metals used in LWR vessels: SA 533 Grade B, Class 1 (SA533B1) low alloy steel, which is used to fabricate most US LWR reactor vessels; and Type 304 Stainless Steel (SS304), which is used in LWR vessel piping, penetration tubes, and internal structures. This paper summarizes the new data and compares it to existing, lower temperature data in the literature.

Joshua E. Daw; Joy L. Rempe; Darrell L. Knudson; John C. Crepeau

2008-05-01T23:59:59.000Z

419

A Comparative Study of Metaheuristic Methods for Transmission Network Expansion Planning  

Science Conference Proceedings (OSTI)

Transmission network expansion planning is a very complex and computationally demanding problem due to the discrete nature of the optimization variables. This complexity has increased even more in a restructured deregulated environment. In this regard, ... Keywords: Bacteria Foraging, Genetic Algorithm, Metaheuristics, Particle Swarm Optimization, Transmission Expansion Planning

Ashu R. Verma; P. K. Bijwe; B. Panigrahi

2010-10-01T23:59:59.000Z

420

Incorporating oligopoly, CO2 emissions trading and green certificates into a power generation expansion model  

Science Conference Proceedings (OSTI)

This paper presents a generation expansion model for the power sector which incorporates several features that make it very interesting for application to current electricity markets: it considers the possible oligopolistic behavior of firms, and incorporates ... Keywords: Carbon emissions trading, Generation-expansion modeling, Green certificates, Oligopoly

Pedro Linares; Francisco Javier Santos; Mariano Ventosa; Luis Lapiedra

2008-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
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421

Character-level analysis of semi-structured documents for set expansion  

Science Conference Proceedings (OSTI)

Set expansion refers to expanding a partial set of "seed" objects into a more complete set. One system that does set expansion is SEAL (Set Expander for Any Language), which expands entities automatically by utilizing resources from the Web in a language-independent ...

Richard C. Wang; William W. Cohen

2009-08-01T23:59:59.000Z

422

Cluster expansion for abstract polymer models. New bounds from an old approach  

E-Print Network (OSTI)

We revisit the classical approach to cluster expansions, based on tree graphs, and establish a new convergence condition that improves those by Kotecky-Preiss and Dobrushin, as we show in some examples. The two ingredients of our approach are: (i) a careful consideration of the Penrose identity for truncated functions, and (ii) the use of iterated transformations to bound tree-graph expansions.

Roberto Fernandez; Aldo Procacci

2006-05-12T23:59:59.000Z

423

Scalability of Dynamic Storage Allocation Algorithms  

E-Print Network (OSTI)

Dynamic storage allocation has a significant impact on computer performance. A dynamic storage allocator manages space for objects whose lifetimes are not known by the system at the time of their creation. A good dynamic storage allocator should utilize storage efficiently and satisfy requests in as few instructions as possible. A dynamic storage allocator on a multiprocessor should have the ability to satisfy multiple requests concurrently. This paper examines parallel dynamic storage allocation algorithms and how performancescales with increasing numbers of processors. The highest throughputs and lowest instruction counts are achieved with multiple free list fit I. The best memory utilization is achieved using a best fit system.

Arun Iyengar

1996-01-01T23:59:59.000Z

424

Accelerating Atomic Orbital-based Electronic Structure Calculation via Pole Expansion plus Selected Inversion  

SciTech Connect

We describe how to apply the recently developed pole expansion plus selected inversion (PEpSI) technique to Kohn-Sham density function theory (DFT) electronic structure calculations that are based on atomic orbital discretization. We give analytic expressions for evaluating charge density, total energy, Helmholtz free energy and atomic forces without using the eigenvalues and eigenvectors of the Kohn-Sham Hamiltonian. We also show how to update the chemical potential without using Kohn-Sham eigenvalues. The advantage of using PEpSI is that it has a much lower computational complexity than that associated with the matrix diagonalization procedure. We demonstrate the performance gain by comparing the timing of PEpSI with that of diagonalization on insulating and metallic nanotubes. For these quasi-1D systems, the complexity of PEpSI is linear with respect to the number of atoms. This linear scaling can be observed in our computational experiments when the number of atoms in a nanotube is larger than a few hundreds. Both the wall clock time and the memory requirement of PEpSI is modest. This makes it even possible to perform Kohn-Sham DFT calculations for 10,000-atom nanotubes on a single processor. We also show that the use of PEpSI does not lead to loss of accuracy required in a practical DFT calculation.

Lin, Lin; Chen, Mohan; Yang, Chao; He, Lixin

2012-02-10T23:59:59.000Z

425

Digestion time  

NLE Websites -- All DOE Office Websites (Extended Search)

Digestion time Digestion time Name: Don Mancosh Location: N/A Country: N/A Date: N/A Question: I have always given the rule of thumb in class that material we eat is with us for about 24 hours before exiting the body. The question arises about the time value of liquids. Getting a big coke prior to a 3 hour drive generally means that there will be a stop along the way. Is there a generalization made about liquids in the body similar to the one for solid food? Replies: A physician would give a better answer, but I hazard this: the only liquids which people consume (deliberately) in significant quantities are water, ethyl alcohol and various oils. Water and alcohol are absorbed on a time scale of seconds to minutes through the mouth, stomach and digestive tract. The oils are huge molecules, so I'd guess like any other greasy food they get absorbed in the upper digestive tract. Some of them, perhaps the longest and most nonpolar, are not absorbed at all --- cf. the old-time remedy of mineral oil for constipation --- so there should be some average time-before-what's-left-is-excreted such as you're looking for, and my (wild) guess is that it would not differ substantially from that for food. You can define an average lifetime in the body for alcohol, since the natural level is zero. Rough guidelines are widespread in the context of drunk driving laws. But this is not really possible for water. One's body is normally full up to the brim with water, and there's no way for the body to distinguish between water molecules recently absorbed and molecules that've been moping around since the Beatles split up. Thus the water entering the toilet bowl after the pit stop is not in general the same water as was in the big coke. If you were to consider for water just the average time between drinking and peeing, it would seem to depend strongly on how well hydrated the body was before the drink, and how much was drunk. During sustained heavy exertion in the sun and dry air one can easily drink a pint of water an hour without peeing at all. On the other hand, if one is willing to drink enough water fast enough, so as to establish a high excess of body water one can pee 8 ounces 15 minutes or less after drinking 8 ounces.

426

Year-in-Review: 2012 Energy Infrastructure Events and Expansions Now  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Year-in-Review: 2012 Energy Infrastructure Events and Expansions Year-in-Review: 2012 Energy Infrastructure Events and Expansions Now Available (July 2013) Year-in-Review: 2012 Energy Infrastructure Events and Expansions Now Available (July 2013) July 26, 2013 - 12:07pm Addthis The Office of Electricity Delivery and Energy Reliability has released the Year-in-Review: 2012 Energy Infrastructure Events and Expansions. This publication provides a summary of significant energy disruptions and infrastructure changes that occurred in the United States throughout 2012. The focus is on the United States, but international events that impacted the United States are also reported. The 2012 YIR is based primarily on information reported in the Energy Assurance Daily (EAD) between January 1, 2012 and December 31, 2012. The full Year-in-Review: 2012 Energy Infrastructure Events and Expansions

427

VP 100: Charlotte Sees Next-Gen Vehicle Supply Expansion | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

VP 100: Charlotte Sees Next-Gen Vehicle Supply Expansion VP 100: Charlotte Sees Next-Gen Vehicle Supply Expansion VP 100: Charlotte Sees Next-Gen Vehicle Supply Expansion March 12, 2010 - 2:47pm Addthis Charlotte sees next-gen vehicle supply expansion: U.S. Energy Secretary Steve Chu speaks at Celgard LLC in Charlotte, N.C. as Mitch Pulwer, Celgard’s vice president and general manager, looks on. | Photo courtesy of Celgard | Charlotte sees next-gen vehicle supply expansion: U.S. Energy Secretary Steve Chu speaks at Celgard LLC in Charlotte, N.C. as Mitch Pulwer, Celgard's vice president and general manager, looks on. | Photo courtesy of Celgard | Joshua DeLung Right now, manufacturers of electric cars too often have to rely on foreign suppliers for the high-performance batteries needed in those vehicles. But

428

VP 100: Charlotte Sees Next-Gen Vehicle Supply Expansion | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

VP 100: Charlotte Sees Next-Gen Vehicle Supply Expansion VP 100: Charlotte Sees Next-Gen Vehicle Supply Expansion VP 100: Charlotte Sees Next-Gen Vehicle Supply Expansion March 12, 2010 - 2:47pm Addthis Charlotte sees next-gen vehicle supply expansion: U.S. Energy Secretary Steve Chu speaks at Celgard LLC in Charlotte, N.C. as Mitch Pulwer, Celgard’s vice president and general manager, looks on. | Photo courtesy of Celgard | Charlotte sees next-gen vehicle supply expansion: U.S. Energy Secretary Steve Chu speaks at Celgard LLC in Charlotte, N.C. as Mitch Pulwer, Celgard's vice president and general manager, looks on. | Photo courtesy of Celgard | Joshua DeLung Right now, manufacturers of electric cars too often have to rely on foreign suppliers for the high-performance batteries needed in those vehicles. But

429

Fairness and dynamic pricing: comments  

Science Conference Proceedings (OSTI)

In ''The Ethics of Dynamic Pricing,'' Ahmad Faruqui lays out a case for improved efficiency in using dynamic prices for retail electricity tariffs and addresses various issues about the distributional effects of alternative pricing mechanisms. The principal contrast is between flat or nearly constant energy prices and time-varying prices that reflect more closely the marginal costs of energy and capacity. The related issues of fairness criteria, contracts, risk allocation, cost allocation, means testing, real-time pricing, and ethical policies of electricity market design also must be considered. (author)

Hogan, William W.

2010-07-15T23:59:59.000Z

430

Zambia : long-term generation expansion study - executive summary.  

SciTech Connect

The objective of this study is to analyze possible long-term development options of the Zambian electric power system in the period up to 2015. The analysis involved the hydro operations studies of the Zambezi river basin and the systems planning studies for the least-cost generation expansion planning. Two well-known and widely accepted computer models were used in the analysis: PC-VALORAGUA model for the hydro operations and optimization studies and the WASP-III Plus model for the optimization of long-term system development. The WASP-III Plus model is a part of the Argonne National Laboratory's Energy and Power Evaluation Model (ENPEP). The analysis was conducted in close collaboration with the Zambia Electricity Supply Corporation (ZESCO). On the initiative from The World Bank, the sponsor of the study, ZESCO formed a team of experts that participated in the analysis and were trained in the use of computer models. Both models were transferred to ZESCO free of charge and installed on several computers in the ZESCO corporate offices in Lusaka. In September-October 1995, two members of the ZESCO National Team participated in a 4-week training course at Argonne National Laboratory near Chicago, U.S.A., focusing on the long-term system expansion planning using the WASP and VALORAGUA models. The hydropower operations studies were performed for the whole Zambezi river basin, including the full installation of the Kariba power station, and the Cahora Bassa hydro power station in Mozambique. The analysis also included possible future projects such as Itezhi-Tezhi, Kafue Gorge Lower, and Batoka Gorge power stations. As hydropower operations studies served to determine the operational characteristics of the existing and future hydro power plants, it was necessary to simulate the whole Zambezi river basin in order to take into account all interactions and mutual influences between the hydro power plants. In addition, it allowed for the optimization of reservoir management and optimization of hydro cascades, resulting in the better utilization of available hydro potential. Numerous analyses were performed for different stages of system development. These include system configurations that correspond to years 1997, 2001, 2015 and 2020. Additional simulations were performed in order to determine the operational parameters of the three existing hydro power stations Victoria Falls, Kariba, and Kafue Gorge Upper, that correspond to the situation before and after their rehabilitation. The rehabilitation works for these three major power stations, that would bring their operational parameters and availability back to the design level, are planned to be carried out in the period until 2000. The main results of the hydro operations studies are presented in Table ES-1. These results correspond to VALORAGUA simulations of system configurations in the years 2001 and 2015. The minimum, average, and maximum electricity generation is based on the simulation of monthly water inflows that correspond to the chronological series of unregulated water inflows at each hydro profile in the period from April 1961 to March 1990. The recommended hydrology dataset provided in the Hydrology Report of the SADC Energy Project AAA 3.8 was used for this study.

Conzelmann, G.; Koritarov, V.; Buehring, W.; Veselka, T.; Decision and Information Sciences

2008-02-28T23:59:59.000Z

431

Influence of Crystal Expansion/Contraction on Zeolite Membrane Permeation  

SciTech Connect

X-ray diffraction was used to measure the unit cell parameters of B-ZSM-5, SAPO-34, and NaA zeolite powders as a function of adsorbate loading at 303 K, and in one case, at elevated temperatures. Most adsorbates expanded the zeolite crystals below saturation loading at 303 K: n-hexane and SF6 in B-ZSM-5, methanol and CO2 in SAPO-34, and methanol in NaA zeolite. As the loadings increased, the crystals expanded more. Changes in the unit cell volumes of B-ZSM-5 and SAPO-34 zeolite powders correlated with changes in permeation through zeolite membranes defects. When the zeolite crystals expanded or contracted upon adsorption, the defect sizes decreased or increased. In B-ZSM-5 membranes, the fluxes through defects decreased dramatically when n-hexane or SF6 adsorbed. In contrast, i-butane adsorption at 303 K contracted B-ZSM-5 crystals at low loadings and expanded them at higher loadings. Correspondingly, the flux through B-ZSM-5 membrane defects increased at low i-butane loadings and decreased at high loading because the defects increased in size at low loading and decreased at high loadings. At 398 K and 473 K, n-hexane expanded the B-ZSM-5 unit cell more as the temperature increased from 303 to 473 K. The silicalite-1 and B-ZSM-5 unit cell volumes expanded similarly upon n-hexane adsorption at 303 K; boron substitution had little effect on volume expansion.

Sorenson, Stephanie G [University of Colorado, Boulder; Payzant, E Andrew [ORNL; Noble, Richard D [University of Colorado, Boulder; Falconer, John L. [University of Colorado, Boulder

2010-01-01T23:59:59.000Z

432

Environmental Assessment for the Proposed Consolidation and Expansion...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

a short period of time. Other than traffic, noise emission sources include heating and cooling systems, transformers, engines, pumps, materials- handling equipment, and others....

433

Energy drift in reversible time integration  

E-Print Network (OSTI)

Energy drift is commonly observed in reversible integrations of systems of molecular dynamics. We show that this drift can be modelled as a diffusion and that the typical energy error after time T is O(?T).

R I McLachlan; M Perlmutter

2004-01-01T23:59:59.000Z

434

Constraints on Dark Energy from the Observed Expansion of our Cosmic Horizon  

E-Print Network (OSTI)

Within the context of standard cosmology, an accelerating universe requires the presence of a third `dark' component of energy, beyond matter and radiation. The available data, however, are still deemed insufficient to distinguish between an evolving dark energy component and the simplest model of a time-independent cosmological constant. In this paper, we examine the cosmological expansion in terms of observer-dependent coordinates, in addition to the more conventional co-moving coordinates. This procedure explicitly reveals the role played by the radius R_h of our cosmic horizon in the interrogation of the data. (In Rindler's notation, R_h coincides with the `event horizon' in the case of de Sitter, but changes in time for other cosmologies that also contain matter and/or radiation.) With this approach, we show that the interpretation of dark energy as a cosmological constant is clearly disfavored by the observations. Within the framework of standard Friedman-Robertson-Walker cosmology, we derive an equation describing the evolution of R_h, and solve it using the WMAP and Type Ia supernova data. In particular, we consider the meaning of the observed equality (or near equality) R_h(t_0) ~ ct_0, where t_0 is the age of the Universe. This empirical result is far from trivial, for a cosmological constant would drive R_h(t) towards ct (where t is the cosmic time) only once--and that would have to occur right now. Though we are not here espousing any particular alternative model of dark energy, for comparison we also consider scenarios in which dark energy is given by scaling solutions, which simultaneously eliminate several conundrums in the standard model, including the `coincidence' and `flatness' problems, and account very well for the fact that R_h(t_0) ~ ct_0.

Fulvio Melia

2008-12-27T23:59:59.000Z

435

Investigation of a suppression of asymmetric cell kinetics (SACK) approach for ex vivo expansion of human hematopoietic stem cells  

E-Print Network (OSTI)

Ex vivo expansion of hematopoietic stem cells (HSCs) is a long-standing challenge faced by both researchers and clinicians. To date, no robust, efficient method for the pure, ex vivo expansion of human HSCs has been ...

Taghizadeh, Rouzbeh R

2006-01-01T23:59:59.000Z

436

Time Brightness  

NLE Websites -- All DOE Office Websites (Extended Search)

Perlmutter, et al., in Thermonuclear Supernovae, NATO ASI, v. 486 (1997) Perlmutter, et al., in Thermonuclear Supernovae, NATO ASI, v. 486 (1997) Cosmology from . . . Time Brightness ... . . . 50-100 Fields Lunar Calendar Scheduled Follow-Up Imaging at Hubble, Cerro Tololo, WIYN, Isaac Newton Scheduled Follow-Up Spectroscopy at Keck Almost 1000 Galaxies per Field RESULT: ~24 Type Ia supernovae discovered while still brightening, at new moon Berkeley Lab Keck WIYN Cerro Tololo Isaac Newton Hubble Strategy We developed a strategy to guarantee a group of supernova discoveries on a certain date. Just after a new moon, we observe some 50 to 100 high-galactic lattitute fields-each containing almost a thousand high-redshift galaxies-in two nights on the Cerro Tololo 4-meter telescope with Tyson & Bernstein's wide-field camera. We return three weeks later to observe the same

437

Quantum field theory in the presence of a medium: Green's function expansions  

SciTech Connect

Starting from a Lagrangian and using functional-integration techniques, series expansions of Green's function of a real scalar field and electromagnetic field, in the presence of a medium, are obtained. The parameter of expansion in these series is the susceptibility function of the medium. Relativistic and nonrelativistic Langevin-type equations are derived. Series expansions for Lifshitz energy in finite temperature and for an arbitrary matter distribution are derived. Covariant formulations for both scalar and electromagnetic fields are introduced. Two illustrative examples are given.

Kheirandish, Fardin [Department of Physics, Islamic Azad University, Shahreza-Branch, Shahreza (Iran, Islamic Republic of); Salimi, Shahriar [Department of Physics, University of Kurdistan, Sanandaj (Iran, Islamic Republic of)

2011-12-15T23:59:59.000Z

438

Highly Anisotropic Thermal Expansion in Molecular Films of Dicarboxylic Fatty Acids  

DOE Green Energy (OSTI)

Angstrom-resolution x-ray measurements reveal the existence of two-dimensional (2D) crystalline order in molecularly thin films of surface-parallel-oriented fatty diacid molecules supported on a liquid mercury surface. The thermal expansion coefficients along the two unit cell vectors are found to differ 17-fold. The high anisotropy of the 2D thermal expansion and the crystalline coherence length are traced to the different bonding in the two directions: van der Waals normal to, and covalent plus hydrogen bonding along the molecular backbone axis. Similarities with, and differences from, negative thermal expansion materials are discussed.

Tamam L.; Ocko B.; Kraack, H.; Sloutskin, E.; Deutsch, M.

2012-05-25T23:59:59.000Z

439

Green Power Management with Dynamic Resource Allocation for Cloud Virtual Machines  

Science Conference Proceedings (OSTI)

With the development of electronics in governments and business, the implementation of these services are increasing demand for servers. Continued expansion of servers represents our need for more space, power, air conditioning, network, human resources ... Keywords: cloud computing, Virtual Machine, Green Power Management (GPM), Dynamic Resource Allocation (DRA)

Chao-Tung Yang; Kuan-Chieh Wang; Hsiang-Yao Cheng; Cheng-Ta Kuo; William Cheng C. Chu

2011-09-01T23:59:59.000Z

440

Dynamic Model Validation of PV Inverters under Short-Circuit Conditions  

Science Conference Proceedings (OSTI)

Photovoltaic (PV) modules have dramatically decreased in price in the past few years, spurring the expansion of PV deployment. Residential and commercial rooftop installations are connected to the distribution network, large-scale installation PV power ... Keywords: photovoltaic, PV, dynamic model, validation, solar PV inverter, renewables

E. Muljadi, M. Singh, R. Bravo, V. Gevorgian

2013-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Hybrid power management in real time embedded systems: an interplay of DVFS and DPM techniques  

Science Conference Proceedings (OSTI)

Energy-aware scheduling of real time applications over multiprocessor systems is considered in this paper. Early research reports that while various energy-saving policies, for instance Dynamic Power Management (DPM) and Dynamic Voltage & Frequency ... Keywords: Dynamic power management, Dynamic voltage & frequency scaling, Energy, Machine learning, Multiprocessor scheduling, Power, Real time systems

Muhammad Khurram Bhatti; Cécile Belleudy; Michel Auguin

2011-03-01T23:59:59.000Z

442

A combination of heuristic and bacteria foraging-differential evolution algorithm for transmission network expansion planning with security constraints  

Science Conference Proceedings (OSTI)

Transmission network expansion planning (TNEP) is an important component of power system planning. Its task is to determine the optimal set of transmission lines to be constructed such that the cost of expansion plan is minimum and no network constraints ... Keywords: Transmission expansion planning, compensation approach, hybrid method

Ashu Verma; P. R. Bijwe; B. K. Panigrahi

2010-04-01T23:59:59.000Z

443

Adaptive Real-Time Methodology for Optimizing Energy-Efficient...  

NLE Websites -- All DOE Office Websites (Extended Search)

Email Adaptive Real-Time Methodology for Optimizing Energy-Efficient Computing Dynamic voltage and frequency scaling (DVFS) is an effective way to reduce energy and power...

444

Secretary Chu Celebrates Expansion of Lithium-Ion Battery Production in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Celebrates Expansion of Lithium-Ion Battery Celebrates Expansion of Lithium-Ion Battery Production in North Carolina Secretary Chu Celebrates Expansion of Lithium-Ion Battery Production in North Carolina July 26, 2011 - 3:15pm Addthis Secretary Chu joins local officials and dignitaries for Celgard's ribbon-cutting. | Photo courtesy of Celgard Secretary Chu joins local officials and dignitaries for Celgard's ribbon-cutting. | Photo courtesy of Celgard Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs What are the key facts? Celgard received $49 million in Recovery Act funding to help expand its Charlotte operations and build a new lithium-ion battery separator facility in Concord. With the help of Recovery Act-funded expansions, Celgard expects to double its production capacity by 2012 and since January 2010, the company

445

Energy Infrastructure Events and Expansions Year-in-Review 2011 Available  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Infrastructure Events and Expansions Year-in-Review 2011 Infrastructure Events and Expansions Year-in-Review 2011 Available (April 2012) Energy Infrastructure Events and Expansions Year-in-Review 2011 Available (April 2012) May 1, 2012 - 3:15pm Addthis The Office of Electricity Delivery and Energy Reliability has released the Energy Infrastructure Events and Expansions Year-in-Review: 2011. This publication provides a summary of significant energy disruptions and infrastructure changes that occurred in the United States throughout 2011. The focus is on the United States, but international events that impacted the United States are also reported. The 2011 YIR is based primarily on information reported in the Energy Assurance Daily (EAD) between January 1, 2011 and December 31, 2011. The full 2011 Year-in-Review is available for download.

446

Secretary Chu Celebrates Expansion of Lithium-Ion Battery Production in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Celebrates Expansion of Lithium-Ion Battery Celebrates Expansion of Lithium-Ion Battery Production in North Carolina Secretary Chu Celebrates Expansion of Lithium-Ion Battery Production in North Carolina July 26, 2011 - 3:15pm Addthis Secretary Chu joins local officials and dignitaries for Celgard's ribbon-cutting. | Photo courtesy of Celgard Secretary Chu joins local officials and dignitaries for Celgard's ribbon-cutting. | Photo courtesy of Celgard Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs What are the key facts? Celgard received $49 million in Recovery Act funding to help expand its Charlotte operations and build a new lithium-ion battery separator facility in Concord. With the help of Recovery Act-funded expansions, Celgard expects to double its production capacity by 2012 and since January 2010, the company

447

U.S.-Chinese Agreement Provides Path to Further Expansion of Nuclear Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

-Chinese Agreement Provides Path to Further Expansion of -Chinese Agreement Provides Path to Further Expansion of Nuclear Energy in China U.S.-Chinese Agreement Provides Path to Further Expansion of Nuclear Energy in China December 16, 2006 - 9:46am Addthis BEIJING, CHINA - U.S. Department of Energy (DOE) Secretary Samuel W. Bodman and Chinese Chairman of National Development and Reform Commission (NDRC) Ma Kai today signed a Memorandum of Understanding (MOU) that will pave the way for Westinghouse Electric Company to construct four civilian nuclear power plants in China. This agreement illustrates the United States government's support of the Chinese expansion and use of safe, emissions-free nuclear power and the related technology transfer. "This is an exciting day for the U.S. nuclear industry. This agreement is

448

Cluster expansion and optimization of thermal conductivity in SiGe nanowires  

E-Print Network (OSTI)

We investigate the parametrization and optimization of thermal conductivity in silicon-germanium alloy nanowires by the cluster-expansion technique. Si1?xGex nanowires are of interest for thermoelectric applications and ...

Chan, Maria K.

449

Energy Infrastructure Events and Expansions Year-in-Review 2011 Available  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy Infrastructure Events and Expansions Year-in-Review 2011 Energy Infrastructure Events and Expansions Year-in-Review 2011 Available (April 2012) Energy Infrastructure Events and Expansions Year-in-Review 2011 Available (April 2012) May 1, 2012 - 3:15pm Addthis The Office of Electricity Delivery and Energy Reliability has released the Energy Infrastructure Events and Expansions Year-in-Review: 2011. This publication provides a summary of significant energy disruptions and infrastructure changes that occurred in the United States throughout 2011. The focus is on the United States, but international events that impacted the United States are also reported. The 2011 YIR is based primarily on information reported in the Energy Assurance Daily (EAD) between January 1, 2011 and December 31, 2011. The full 2011 Year-in-Review is available for download.

450

Copper Mountain Expansion I and II Solar Power Plant | Open Energy  

Open Energy Info (EERE)

Expansion I and II Solar Power Plant Expansion I and II Solar Power Plant Jump to: navigation, search Name Copper Mountain Expansion I and II Solar Power Plant Facility Copper Mountain Expansion I and II Sector Solar Facility Type Photovoltaic Developer First Solar/Sempra Location Boulder City, Nevada Coordinates 35.9785911°, -114.8324851° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.9785911,"lon":-114.8324851,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

451

Understanding Hadley Cell Expansion versus Contraction: Insights from Simplified Models and Implications for Recent Observations  

Science Conference Proceedings (OSTI)

This study seeks a deeper understanding of the causes of Hadley Cell (HC) expansion, as projected under global warming, and HC contraction, as observed under El Niño. Using an idealized general circulation model, the authors show that a thermal ...

Neil F. Tandon; Edwin P. Gerber; Adam H. Sobel; Lorenzo M. Polvani

2013-06-01T23:59:59.000Z

452

Pressurized heat treatment of glass-ceramic to control thermal expansion  

DOE Patents (OSTI)

A method of producing a glass-ceramic having a specified thermal expansion value is disclosed. The method includes the step of pressurizing the parent glass material to a predetermined pressure during heat treatment so that the glass-ceramic produced has a specified thermal expansion value. Preferably, the glass-ceramic material is isostatically pressed. A method for forming a strong glass-ceramic to metal seal is also disclosed in which the glass-ceramic is fabricated to have a thermal expansion value equal to that of the metal. The determination of the thermal expansion value of a parent glass material placed in a high-temperature environment is also used to determine the pressure in the environment.

Kramer, Daniel P. (Dayton, OH)

1985-01-01T23:59:59.000Z

453

Computing the Seawater Expansion Coefficients Directly from the 1980 Equation of State  

Science Conference Proceedings (OSTI)

The polynomial structure of the 1980 equation of state for seawater lends itself to analytic differentiation with respect to pressure, temperature, and salinity. This enables one to compute the compressibility, thermal expansion, and haline ...

J. L. Lillibridge III

1989-02-01T23:59:59.000Z

454

Theoretical Simulation and Experimental Characterization of an Expansion-Type Kelvin Spectrometer with Intrinsic Calibration  

Science Conference Proceedings (OSTI)

An expansion-type Kelvin spectrometer has been designed and its performance has been shown to agree with the theoretical simulation within experimental uncertainty. In the intrinsically calibrated mode, number concentration as well as ...

W. Holländer; W. Dunkhorst; H. Lödding; H. Windt

2002-11-01T23:59:59.000Z

455

Four-Stream Spherical Harmonic Expansion Approximation for Solar Radiative Transfer  

Science Conference Proceedings (OSTI)

This paper presents a four-stream extension of the ?-Eddington approximation by considering the higher-order spherical harmonic expansion in radiative intensity. By using the orthogonality relation of the spherical harmonic functions, the ...

J. Li; V. Ramaswamy

1996-04-01T23:59:59.000Z

456

Constraints on the Origin of Paleolake Expansions in the Central Andes  

Science Conference Proceedings (OSTI)

During the late Pleistocene, at least one episode of lake expansions occurred in the internally draining high plateau region of Bolivia. Some researchers have advocated that a wetter climate associated with a change in atmospheric circulation ...

Troy A. Blodgett; Bryan L. Isacks; John D. Lenters

1997-01-01T23:59:59.000Z

457

A corpus analysis approach for automatic query expansion and its extension to multiple databases  

Science Conference Proceedings (OSTI)

Searching online text collections can be both rewarding and frustrating. While valuable information can be found, typically many irrelevant documents are also retrieved, while many relevant ones are missed. Terminology mismatches between the user's ... Keywords: query expansion

Susan Gauch; Jianying Wang; Satya Mahesh Rachakonda

1999-07-01T23:59:59.000Z

458

Impact of unit commitment constraints on generation expansion planning with renewables  

E-Print Network (OSTI)

Growing use of renewables pushes thermal generators against operating constraints - e.g. ramping, minimum output, and operating reserves - that are traditionally ignored in expansion planning models. We show how including ...

Palmintier, Bryan Stephen

459

Ice Crystals Produced by Expansion: Experiments and Application to Aircraft-produced Ice  

Science Conference Proceedings (OSTI)

The production of ice crystals as a result of the expansion and cooling of moist air was investigated by laboratory experiment. In particular, the warmest expanded air temperature that produces crystals was sought as a function of the initial ...

T. C. Foster; J. Hallett

1993-04-01T23:59:59.000Z

460

High-order commutator-free exponential time-propagation of driven quantum systems  

Science Conference Proceedings (OSTI)

We discuss the numerical solution of the Schrodinger equation with a time-dependent Hamilton operator using commutator-free time-propagators. These propagators are constructed as products of exponentials of simple weighted sums of the Hamilton operator. ... Keywords: Driven quantum systems, Lie group integrators, Magnus expansion, Time-dependent Schrödinger equation

A. Alvermann; H. Fehske

2011-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamic time expansion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Numerical Analysis of the Dynamics of Two- and Three-Dimensional Fluidized Bed Reactors using an Euler-Lagrange Approach  

SciTech Connect

Biomass thermochemical conversion, often done in fluidized beds, recently gained a lot of attention due to its potential to efficiently produce renewable liquid fuels. Optimization of reactor design and operating conditions, however, requires a fundamental understanding of bed dynamics. In this work, a numerical framework based on an Euler-Lagrange approach is developed and used to perform and analyze large-scale simulations of two- and three-dimensional periodic fluidized beds. Collisions are handled using a soft-sphere model. An efficient parallel implementation allows one to explicitly track over 30 million particles, which is representative of the number of particles found in lab-scale reactor, therefore demonstrating the capability of Lagrangian approaches to simulate realistic systems at that scale. An on-the-fly bubble identification and tracking algorithm is used to characterize bubble dynamics for inlet velocities up to 9 times the minimum fluidization velocity. Statistics for gas volume fraction, gas and particle velocities, bed expansion, and bubble size and velocity, is compared across the two- and three-dimensional configurations, and comparison with literature data generally shows good agreement. The wide distribution of gas residence times observed in the simulations is linked to the different gas hold-up characteristics of the gas-solid system.

Pepiot, P.; Desjardins, O.

2012-04-01T23:59:59.000Z

462

Green's Function expansion of scalar and vector fields in the presence of a medium  

E-Print Network (OSTI)

Based on a canonical approach and functional-integration techniques, a series expansion of Green's function of a scalar field, in the presence of a medium, is obtained. A series expansion for Lifshitz-energy, in finite-temperature, in terms of the susceptibility of the medium is derived and the whole formalism is generalized to the case of electromagnetic field in the presence of some dielectrics. A covariant formulation of the problem is presented.

Fardin Kheirandish; Shahriar Salimi

2010-10-17T23:59:59.000Z

463

A Conceptual Framework for Estimating Bioenerg-Related Land-Use Change and Its Impacts over Time  

E-Print Network (OSTI)

2006). www.bio.org/ind/biofuel/SustainableBiomassReport.pdf.Land Clearing and the Biofuel Carbon Debt,” Science 319:Times for Crop-Based Biofuel Expansion in the Tropics: The

Delucchi, Mark

2009-01-01T23:59:59.000Z

464

Field investigations examining the impact of supersaturated vapor expansions on turbine performance  

DOE Green Energy (OSTI)

Investigators in the Heat Cycle Research project are developing a technology base which will permit the increased utilization of the moderate-temperature, liquid-dominated geothermal resource for the production of electrical power. The project investigations have focused upon power cycles which have the potential for the increased utilization (power produced per unit quantity of fluid) of the hydrothermal resource. The investigations to date have confirmed the viability of technology required to incorporate concepts which will allow the binary power cycle to have a perf