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1

Continuing Development of Models Based on Spherical Geodesic Grids  

E-Print Network (OSTI)

Continuing Development of Models Based on Spherical Geodesic Grids Ross Heikes, Joon-Hee Jung, C to finite-difference operators 3) Some numerical results from an aqua-planet simulation #12;Part1: Geodesic -- array based The geodesic grid can be mapped to a set of square arrays. 1 3 4 5 6 7 8 9 10 11 12 13 14 15

Collett Jr., Jeffrey L.

2

Visualizing the Jablonowski Test Case on a Geodesic Grid at NERSC  

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

Jablonowski on geodesic grid Jablonowski test case on geodesic grid jablonowskiprabhat.png Accurate modeling of Earth's climate is one of the biggest challenges facing HPC today....

3

GeoF: Geodesic Forests for Learning Coupled Predictors P. Kontschieder  

E-Print Network (OSTI)

GeoF: Geodesic Forests for Learning Coupled Predictors P. Kontschieder P. Kohli J. Shotton A are captured via new long-range, soft connectivity features, computed via generalized geodesic distance trans

Kohli, Pushmeet

4

Non-geodesic motion in $f({\\mathcal G})$ gravity with non-minimal coupling  

E-Print Network (OSTI)

The dynamics of test particles in $f(\\mathcal G)$ modified Gauss-Bonnet gravity is investigated. It is shown that in $f({\\mathcal G})$ gravity models with non-minimal coupling to matter, particles experience an extra force normal to their four-velocities and as a result move along non- geodesic world-lines. The explicit form of the extra force depends on the function of the Gauss-Bonnet term included in coupling term. The effects of this force on the relative accelerations of particles are studied.

Morteza Mohseni

2009-11-14T23:59:59.000Z

5

Geodesic Lines, . . . Covariant . . .  

E-Print Network (OSTI)

Geodesic Lines, . . . Covariant . . . Home Page Title Page Page 781 of 818 Go Back Full Screen Close Quit 14.11. Geodesic Lines, Local Gauss-Bonnet Theorem Geodesics play a very important role in surface theory and in dynamics. One of the main reasons why geodesics are so important

Gallier, Jean

6

Normal Curvature . . . Geodesic Curvature . . .  

E-Print Network (OSTI)

Normal Curvature . . . Geodesic Curvature . . . Home Page Title Page Page 683 of 711 Go Back Full quadratic form associated with a surface. #12;Normal Curvature . . . Geodesic Curvature . . . Home Page Title Page Page 684 of 711 Go Back Full Screen Close Quit The component g is called the geodesic

Gallier, Jean

7

Geodesic Patterns Helmut Pottmann  

E-Print Network (OSTI)

Geodesic Patterns Helmut Pottmann KAUST, TU Wien Qixing Huang Stanford University Bailin Deng TU University Johannes Wallner TU Graz, TU Wien Figure 1: Geodesic patterns on freeform surfaces. Left into parts which can be covered by geodesic strips of roughly constant width. Right: A timber construction

Pottmann, Helmut

8

Geodesic distances in Liouville quantum gravity  

E-Print Network (OSTI)

In order to study the quantum geometry of random surfaces in Liouville gravity, we propose a definition of geodesic distance associated to a Gaussian free field on a regular lattice. This geodesic distance is used to numerically determine the Hausdorff dimension associated to shortest cycles of 2d quantum gravity on the torus coupled to conformal matter fields, showing agreement with a conjectured formula by Y. Watabiki. Finally, the numerical tools are put to test by quantitatively comparing the distribution of lengths of shortest cycles to the corresponding distribution in large random triangulations.

Jan Ambjorn; Timothy Budd

2014-11-12T23:59:59.000Z

9

Geodesic Completeness around Sudden Singularities  

E-Print Network (OSTI)

In this talk we analyze the effect of recently proposed classes of sudden future singularities on causal geodesics of FLRW spacetimes. Geodesics are shown to be extendible and just the equations for geodesic deviation are singular, although tidal forces are not strong enough to produce a Big Rip.

L. Fernández-Jambrina; R. Lazkoz

2009-03-31T23:59:59.000Z

10

Geodesic spaces : momentum Groups : symmetry  

E-Print Network (OSTI)

Geodesic spaces : momentum :: Groups : symmetry Vaughan Pratt Stanford University BLAST 2010 a · b denoting b rotated 90 degrees about a. End of reprise. 3. This talk; Geodesic spaces At FMCS. as points evenly spaced along a geodesic , right distributivity expresses a symmetry of about an arbitrary

Pratt, Vaughan

11

Equidistribution results for geodesic flows  

E-Print Network (OSTI)

Using the works of Ma\\~n\\'e \\cite{Ma} and Paternain \\cite{Pat} we study the distribution of geodesic arcs with respect to equilibrium states of the geodesic flow on a closed manifold, equipped with a $\\mathcal{C}^{\\infty}$ Riemannian metric. We prove large deviations lower and upper bounds and a contraction principle for the geodesic flow in the space of probability measures of the unit tangent bundle. We deduce a way of approximating equilibrium states for continuous potentials.

Abdelhamid Amroun

2011-09-15T23:59:59.000Z

12

Geodesic measures of the landscape  

E-Print Network (OSTI)

We study the landscape models of eternal inflation with an arbitrary number of different vacua states, both recyclable and terminal. We calculate the abundances of bubbles following different geodesics. We show that the results obtained from generic time-like geodesics have undesirable dependence on initial conditions. In contrast, the predictions extracted from ``eternal'' geodesics, which never enter terminal vacua, do not suffer from this problem. We derive measure equations for ensembles of geodesics and discuss possible interpretations of initial conditions in eternal inflation.

Vitaly Vanchurin

2007-01-26T23:59:59.000Z

13

Kinetic theory of geodesic acoustic and related modes  

E-Print Network (OSTI)

be driven by high energy partricles? Transport regulation/modulation? Coupling to high energy particles-mode?" oscillations with · 1992: Chu, Green et al., Coupling of Alfven and sound continuum via geodesic curvature dispersion relation with 7/4, electromagnetic (Alfven modes) effects but no references to Winsor, Green

14

Geodesic deviation and gravitational waves  

E-Print Network (OSTI)

The detection of gravitational waves based on the geodesic deviation equation is discussed. In particular, it is shown that the only non-vanishing components of the wave field in the conventional traceless-transverse gauge in linearized general relativity do not enter the geodesic deviation equation, and therefore, apparently, no effect is predicted by that equation in that specific gauge. The reason is traced back to the fact that the geodesic deviation equation is written in terms of a coordinate distance, which is not a directly measurable quantity. On the other hand, in the proper Lorentz frame of the detector, the conventional result described in standard textbooks holds.

M. Leclerc

2006-05-24T23:59:59.000Z

15

Second Order Geodesic Corrections to Cosmic Shear  

E-Print Network (OSTI)

We consider the impact of second order corrections to the geodesic equation governing gravitational lensing. We start from the full second order metric, including scalar, vector and tensor perturbations, and retain all relevant contributions to the cosmic shear corrections that are second order in the gravitational potential. The relevant terms are: the nonlinear evolution of the scalar gravitational potential, the Born correction, and lens-lens coupling. No other second order terms contribute appreciably to the lensing signal. Since ray-tracing algorithims currently include these three effects, this derivation serves as rigorous justification for the numerical predictions.

S. Dodelson; E. W. Kolb; S. Matarrese; A. Riotto; P. Zhang

2005-03-07T23:59:59.000Z

16

Coupled fluid structure simulations for application to grid-to-rod fretting  

E-Print Network (OSTI)

Grid-to-rod fretting (GTRF) has been the major cause of fuel leakage in Pressurized Water Reactors (PWRs) for the past ten years. It is responsible for over 70% of the fuel leaking in PWRs in the United States. The Consortium ...

Tan-Torres, Sasha Angela

2014-01-01T23:59:59.000Z

17

On Geodesic Motion in Horava-Lifshitz Gravity  

E-Print Network (OSTI)

We propose an action for a free particle in Horava-Lifshitz gravity based on Foliation Preserving Diffeomorphisms. The action reduces to the usual relativistic action in the low energy limit and allows for subluminal and superluminal motions with upper and lower bounds on velocity respectively. We find that deviation from general relativity is governed by a position dependent coupling constant which also depends on the mass of the particle. As a result, light-like geodesics are not affected whereas massive particles follow geodesics that become mass dependent and hence the equivalence principle is violated. We make an exact study for geodesics in flat space and a qualitative analysis for those in a spherically symmetric curved background.

Amir Esmaeil Mosaffa

2010-01-04T23:59:59.000Z

18

Geodesic as limits of geodesics on PL-surfaces Andre Lieutier  

E-Print Network (OSTI)

Geodesic as limits of geodesics on PL-surfaces Andr´e Lieutier Boris Thibert Last modification of geodesics on PL-surfaces and in particular on subdivision surfaces. More precisely, if a sequence (Tn)nN of PL-surfaces converges in distance and in normals to a smooth surface S and if Cn is a geodesic of Tn

Paris-Sud XI, Université de

19

Geodesic Methods for Shape and Surface Processing  

E-Print Network (OSTI)

Geodesic Methods for Shape and Surface Processing Gabriel Peyr´e and Laurent Cohen Ceremade, UMR the theory and practice of the nu- merical computation of geodesic distances on Riemannian manifolds be preferred). Using this local tensor field, the geodesic distance is used to solve many problems of practical

Paris-Sud XI, Université de

20

Geodesic Shape Retrieval via Optimal Mass Transport  

E-Print Network (OSTI)

Geodesic Shape Retrieval via Optimal Mass Transport Julien Rabin, Gabriel Peyr´e, and Laurent D presents a new method for 2-D and 3-D shape retrieval based on geodesic signatures. These signatures of geodesic distance maps to each point. The resulting high dimensional distributions are matched to perform

Boyer, Edmond

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Geodesic-invariant equations of gravitation  

E-Print Network (OSTI)

Einstein's equations of gravitation are not invariant under geodesic mappings, i. e. under a certain class of mappings of the Christoffel symbols and the metric tensor which leave the geodesic equations in a given coordinate system invariant. A theory in which geodesic mappings play the role of gauge transformations is considered.

Leonid V. Verozub

2008-02-04T23:59:59.000Z

22

GEODESIC INTERSECTIONS IN ARITHMETIC HYPERBOLIC 3-MANIFOLDS  

E-Print Network (OSTI)

GEODESIC INTERSECTIONS IN ARITHMETIC HYPERBOLIC 3-MANIFOLDS Kerry N. Jones Alan W. Reid Abstract. It was shown by Chinburg and Reid that there exist closed hyperbolic 3-manifolds in which all closed geodesics closed geodesics simple and disjoint. The natural conjecture arose that the Chinburg-Reid examples also

Jones, Kerry N.

23

Optimization over geodesics for exact principal geodesic analysis  

Science Journals Connector (OSTI)

In fields ranging from computer vision to signal processing and statistics, increasing computational power allows a move from classical linear models to models that incorporate non-linear phenomena. This shift has created interest in computational aspects ... Keywords: 57R99, 65K10, Differential geometry, Geometric optimization, Manifold statistics, Principal geodesic analysis, Riemannian metrics

S. Sommer, F. Lauze, M. Nielsen

2014-04-01T23:59:59.000Z

24

Cascading of Fluctuations in Interdependent Energy Infrastructures: Gas-Grid Coupling  

E-Print Network (OSTI)

The revolution of hydraulic fracturing has dramatically increased the supply and lowered the cost of natural gas in the United States driving an expansion of natural gas-fired generation capacity in many electrical grids. Unrelated to the natural gas expansion, lower capital costs and renewable portfolio standards are driving an expansion of intermittent renewable generation capacity such as wind and photovoltaic generation. These two changes may potentially combine to create new threats to the reliability of these interdependent energy infrastructures. Natural gas-fired generators are often used to balance the fluctuating output of wind generation. However, the time-varying output of these generators results in time-varying natural gas burn rates that impact the pressure in interstate transmission pipelines. Fluctuating pressure impacts the reliability of natural gas deliveries to those same generators and the safety of pipeline operations. We adopt a partial differential equation model of natural gas pipeli...

Chertkov, Michael; Backhaus, Scott

2014-01-01T23:59:59.000Z

25

A posteriori error estimates for mixed finite element and finite volume methods for problems coupled through a boundary with nonmatching grids  

Science Journals Connector (OSTI)

......October 2014 research-article Articles A posteriori error estimates for mixed finite...volume methods for problems coupled through a boundary with nonmatching grids T. Arbogast...adjoining domains sharing boundary conditions on a common boundary interface in the important......

T. Arbogast; D. Estep; B. Sheehan; and S. Tavener

2014-10-01T23:59:59.000Z

26

Computing Geodesic Spectra of Surfaces Stony Brook University  

E-Print Network (OSTI)

Computing Geodesic Spectra of Surfaces Miao Jin Stony Brook University Feng Luo Rutgers University on the surface has a unique geodesic. The lengths of all closed geodesics form the geodesic spectrum. The map from the fundamental group to the geodesic spectrum completely determines the conformal structure

Jin, Miao

27

Geodesic congruences in warped spacetimes  

SciTech Connect

In this article, we explore the kinematics of timelike geodesic congruences in warped five-dimensional bulk spacetimes, with and without thick or thin branes. Beginning with geodesic flows in the Randall-Sundrum anti-de Sitter geometry without and with branes, we find analytical expressions for the expansion scalar and comment on the effects of including thin branes on its evolution. Later, we move on to congruences in more general warped bulk geometries with a cosmological thick brane and a time-dependent extra dimensional scale. Using analytical expressions for the velocity field, we interpret the expansion, shear and rotation (ESR) along the flows, as functions of the extra dimensional coordinate. The evolution of a cross-sectional area orthogonal to the congruence, as seen from a local observer's point of view, is also shown graphically. Finally, the Raychaudhuri and geodesic equations in backgrounds with a thick brane are solved numerically in order to figure out the role of initial conditions (prescribed on the ESR) and spacetime curvature on the evolution of the ESR.

Ghosh, Suman [Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur 721 302 (India); Dasgupta, Anirvan [Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur 721 302 (India); Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur 721 302 (India); Kar, Sayan [Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur 721 302 (India); Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur 721 302 (India)

2011-04-15T23:59:59.000Z

28

Geodesic stability, Lyapunov exponents and quasinormal modes  

E-Print Network (OSTI)

Geodesic motion determines important features of spacetimes. Null unstable geodesics are closely related to the appearance of compact objects to external observers and have been associated with the characteristic modes of black holes. By computing the Lyapunov exponent, which is the inverse of the instability timescale associated with this geodesic motion, we show that, in the eikonal limit, quasinormal modes of black holes in any dimensions are determined by the parameters of the circular null geodesics. This result is independent of the field equations and only assumes a stationary, spherically symmetric and asymptotically flat line element, but it does not seem to be easily extendable to anti-de Sitter spacetimes. We further show that (i) in spacetime dimensions greater than four, equatorial circular timelike geodesics in a Myers-Perry black hole background are unstable, and (ii) the instability timescale of equatorial null geodesics in Myers-Perry spacetimes has a local minimum for spacetimes of dimension d > 5.

Vitor Cardoso; Alex S. Miranda; Emanuele Berti; Helvi Witek; Vilson T. Zanchin

2009-03-12T23:59:59.000Z

29

GEODESIC HAM-SANDWICH CUTS Prosenjit Bose  

E-Print Network (OSTI)

GEODESIC HAM-SANDWICH CUTS Prosenjit Bose Erik D. Demaine Ferran Hurtado§ John Iacono¶ Stefan contains r red points and b blue points in its interior. Let n = m + r + b. A ham-sandwich geodesic and the blue points. We present an O(n log k)-time algorithm for finding a ham-sandwich geodesic. We also show

Iacono, John

30

Geodesic Study of Regular Hayward Black Hole  

E-Print Network (OSTI)

This paper is devoted to study the geodesic structure of regular Hayward black hole. The timelike and null geodesic have been studied explicitly for radial and non-radial motion. For timelike and null geodesic in radial motion there exists analytical solution, while for non-radial motion the effective potential has been plotted, which investigates the position and turning points of the particle. It has been found that massive particle moving along timelike geodesics path are dragged towards the BH and continues move around BH in particular orbits.

G. Abbas; U. Sabiullah

2014-06-03T23:59:59.000Z

31

The geodesic flow on a Riemannian supermanifold  

E-Print Network (OSTI)

We give a natural definition of geodesics on a Riemannian supermanifold and extend the usual geodesic flow defined on the cotangent bundle of the body of the supermanifold, associated to the induced Riemannian structure on the body, to a geodesic "superflow" on the cotangent bundle of the supermanifold. Integral curves of this flow turn out to be in natural bijection with geodesics on the Riemannian supermanifold. We also construct the corresponding exponential map and generalize the well-known faithful linearization of isometries to Riemannian supermanifolds.

Stéphane Garnier; Tilmann Wurzbacher

2011-07-09T23:59:59.000Z

32

GEODESIC INTERACTIVE SEGMENTATION IN THE COLOR MONOGENIC SIGNAL Explora Nova,  

E-Print Network (OSTI)

GEODESIC INTERACTIVE SEGMENTATION IN THE COLOR MONOGENIC SIGNAL FRAMEWORK G. Demarcq Explora Nova is based on the computation of geodesic distances within color mono- genic signal (CMS) fields-- Interactive Segmentation, Clifford Alge- bra, Color Monogenic Signal, Geodesic Distances 1. INTRODUCTION

Paris-Sud XI, Université de

33

Geodesics and Geodesic Deviation in static Charged Black Holes  

E-Print Network (OSTI)

The radial motion along null geodesics in static charged black hole space-times, in particular, the Reissner-Nordstr\\"om and stringy charged black holes are studied. We analyzed the properties of the effective potential. The circular photon orbits in these space-times are investigated. We found that the radius of circular photon orbits in both charged black holes are different and differ from that given in Schwarzschild space-time. We studied the physical effects of the gravitational field between two test particles in stringy charged black hole and compared the results with that given in Schwarzschild and Reissner-Nordstr\\"om black holes.

Ragab M. Gad

2010-03-03T23:59:59.000Z

34

Geodesic study of a charged black hole  

E-Print Network (OSTI)

The behavior of the timelike and null geodesics of charged E. Ay$\\acute{o}$n-Beato and A. Garcia (ABG) black hole are investigated. For circular and radial geodesics, we investigate all the possible motions by plotting the effective potentials for different parameters. In conclusion, we have shown that there is no phenomenon of \\textit{superradiance} in this case.

Mehedi Kalam; Nur Farhad; Sk. Monowar Hossein

2013-03-17T23:59:59.000Z

35

Integrable magnetic geodesic flows on Lie groups  

E-Print Network (OSTI)

Right-invariant geodesic flows on manifolds of Lie groups associated with 2-cocycles of corresponding Lie algebras are discussed. Algebra of integrals of motion for magnetic geodesic flows is considered and necessary and sufficient condition of integrability in quadratures is formulated. Canonic forms for 2-cocycles of all 4-dimensional Lie algebras are given and integrable cases among them are separated.

Alexey A. Magazev; Igor V. Shirokov; Yuriy Y. Yurevich

2011-11-03T23:59:59.000Z

36

A Remark About the "Geodesic Principle" in General Relativity  

E-Print Network (OSTI)

A Remark About the "Geodesic Principle" in General Relativity Version 3.0 David B. Malament is the Geodesic Principle: Free massive point particles traverse timelike geodesics. One can think of it as a relativistic version of Newton's first law of motion. It is often claimed that the geodesic principle can

Barrett, Jeffrey A.

37

Geodesic Shape Spaces of Surfaces of Xiuwen Liu1  

E-Print Network (OSTI)

Geodesic Shape Spaces of Surfaces of Genus Zero Xiuwen Liu1 , Washington Mio2 , Yonggang Shi3 surfaces im- mersed in Euclidean space Rk . The spaces are equipped with geodesic metrics that depend on the tension and rigidity of the surfaces. We de- velop algorithms to calculate geodesics and geodesic

Paris-Sud XI, Université de

38

Geodesic Bezier Curves on Triangle Meshes Dimas Martinez Morera  

E-Print Network (OSTI)

Geodesic B´ezier Curves on Triangle Meshes Dimas Mart´inez Morera IMPA - Brazil / ICIMAF - Cuba generalization of B´ezier curves. Thus, we call them "Geodesic B´ezier Curves". Geodesic B´ezier curves, but geodesics connecting the control points. This imposes the necessity of modifying the inter- polation step

39

Geodesic conic subdivision curves on surfaces J. Estrada Sarlabous  

E-Print Network (OSTI)

Geodesic conic subdivision curves on surfaces J. Estrada Sarlabous V. Hern´andez Mederos N. L Matem´atica UFAL Maceio, Brazil Email: dimas@mat.ufal.br Fig. 1. Geodesic conic subdivision curves is inspired in the concept of geodesic B´ezier curves. Starting with a geodesic control polygon with vertices

40

Geodesic Reduction via Frame Bundle Geometry  

E-Print Network (OSTI)

A manifold with an arbitrary affine connection is considered and the geodesic spray associated with the connection is studied in the presence of a Lie group action. In particular, results are obtained that provide insight into the structure of the reduced dynamics associated with the given invariant affine connection. The geometry of the frame bundle of the given manifold is used to provide an intrinsic description of the geodesic spray. A fundamental relationship between the geodesic spray, the tangent lift and the vertical lift of the symmetric product is obtained, which provides a key to understanding reduction in this formulation.

Ajit Bhand

2010-02-22T23:59:59.000Z

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Multichannel image regularization using anisotropic geodesic filtering  

SciTech Connect

This paper extends a recent image-dependent regularization approach introduced in aiming at edge-preserving smoothing. For that purpose, geodesic distances equipped with a Riemannian metric need to be estimated in local neighbourhoods. By deriving an appropriate metric from the gradient structure tensor, the associated geodesic paths are constrained to follow salient features in images. Following, we design a generalized anisotropic geodesic filter; incorporating not only a measure of the edge strength, like in the original method, but also further directional information about the image structures. The proposed filter is particularly efficient at smoothing heterogeneous areas while preserving relevant structures in multichannel images.

Grazzini, Jacopo A [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

42

22nd IAEA-FEC Kinetic theory of Geodesic Acoustic Modes: ... 1 Kinetic theory of Geodesic Acoustic  

E-Print Network (OSTI)

22nd IAEA-FEC Kinetic theory of Geodesic Acoustic Modes: ... 1 Kinetic theory of Geodesic Acoustic Zonca, Liu Chen and Zhiyong Qiu #12;22nd IAEA-FEC Kinetic theory of Geodesic Acoustic Modes: ... 2 Chen and Zhiyong Qiu #12;22nd IAEA-FEC Kinetic theory of Geodesic Acoustic Modes: ... 3 2 Linear

Zonca, Fulvio

43

Separable geodesic action slicing in stationary spacetimes  

E-Print Network (OSTI)

A simple observation about the action for geodesics in a stationary spacetime with separable geodesic equations leads to a natural class of slicings of that spacetime whose orthogonal geodesic trajectories represent freely falling observers. The time coordinate function can then be taken to be the observer proper time, leading to a unit lapse function. This explains some of the properties of the original Painlev\\'e-Gullstrand coordinates on the Schwarzschild spacetime and their generalization to the Kerr-Newman family of spacetimes, reproducible also locally for the G\\"odel spacetime. For the static spherically symmetric case the slicing can be chosen to be intrinsically flat with spherically symmetric geodesic observers, leaving all the gravitational field information in the shift vector field.

Donato Bini; Andrea Geralico; Robert T. Jantzen

2014-08-22T23:59:59.000Z

44

Generating Geodesic Flows and Supergravity Solutions  

E-Print Network (OSTI)

We consider the geodesic motion on the symmetric moduli spaces that arise after timelike and spacelike reductions of supergravity theories. The geodesics correspond to timelike respectively spacelike $p$-brane solutions when they are lifted over a $p$-dimensional flat space. In particular, we consider the problem of constructing \\emph{the minimal generating solution}: A geodesic with the minimal number of free parameters such that all other geodesics are generated through isometries. We give an intrinsic characterization of this solution in a wide class of orbits for various supergravities in different dimensions. We apply our method to three cases: (i) Einstein vacuum solutions, (ii) extreme and non-extreme D=4 black holes in N=8 supergravity and their relation to N=2 STU black holes and (iii) Euclidean wormholes in $D\\geq 3$. In case (iii) we present an easy and general criterium for the existence of regular wormholes for a given scalar coset.

E. Bergshoeff; W. Chemissany; A. Ploegh; M. Trigiante; T. Van Riet

2008-10-30T23:59:59.000Z

45

Magnetic Geodesic Flows on Coadjoint Orbits  

E-Print Network (OSTI)

We describe a class of completely integrable $G$-invariant magnetic geodesic flows on (co)adjoint orbits of a compact connected Lie group $G$ with magnetic field given by the Kirillov-Konstant 2-form.

Alexey V. Bolsinov; Bozidar Jovanovic

2006-04-03T23:59:59.000Z

46

Geodesic completeness of diagonal $G_2$ metrics  

E-Print Network (OSTI)

In this talk a sufficient condition for a diagonal orthogonally transitive cylindrical $G_2$ metric to be geodesically complete is given. The condition is weak enough to comprise all known diagonal perfect fluid cosmological models that are non-singular.

L. Fernández-Jambrina

2009-04-10T23:59:59.000Z

47

A stochastic derivation of the geodesic rule  

E-Print Network (OSTI)

We argue that the geodesic rule, for global defects, is a consequence of the randomness of the values of the Goldstone field $\\phi$ in each causally connected volume. As these volumes collide and coalescence, $\\phi$ evolves by performing a random walk on the vacuum manifold $\\mathcal{M}$. We derive a Fokker-Planck equation that describes the continuum limit of this process. Its fundamental solution is the heat kernel on $\\mathcal{M}$, whose leading asymptotic behavior establishes the geodesic rule.

Nikos Kalogeropoulos

2006-02-09T23:59:59.000Z

48

C 2 DENSELY THE 2-SPHERE HAS AN ELLIPTIC CLOSED GEODESIC  

E-Print Network (OSTI)

C 2 DENSELY THE 2-SPHERE HAS AN ELLIPTIC CLOSED GEODESIC GONZALO CONTRERAS AND FERNANDO OLIVEIRA by a C 1 metric whose geodesic ow has an elliptic closed geodesic. In this paper we show how to overcome-intersecting closed geodesic. This is, the linearized Poincar#19;e map of the geodesic ow at the closed geodesic has

Contreras,Gonzalo

49

Orbifold Riemann surfaces and geodesic algebras  

E-Print Network (OSTI)

We study the Teichm\\"uller theory of Riemann surfaces with orbifold points of order two using the fat graph technique. The previously developed technique of quantization, classical and quantum mapping-class group transformations, and Poisson and quantum algebras of geodesic functions is applicable to the surfaces with orbifold points. We describe classical and quantum braid group relations for particular sets of geodesic functions corresponding to $A_n$ and $D_n$ algebras and describe their central elements for the Poisson and quantum algebras.

L. O. Chekhov

2009-11-01T23:59:59.000Z

50

Time-warped Geodesic Regression , Nikhil Singh1  

E-Print Network (OSTI)

Time-warped Geodesic Regression Yi Hong1 , Nikhil Singh1 , Roland Kwitt3 , and Marc Niethammer1,2 1 geodesic regression with parametric time-warps. This allows, for example, to capture saturation effects. We demonstrate that by augmenting geodesic regression with parametric time-warp functions, we can

51

Landmark-based Geodesic Computation for Heuristically Driven Path Planning  

E-Print Network (OSTI)

Landmark-based Geodesic Computation for Heuristically Driven Path Planning Gabriel Peyr´e CMAP, UMR the geodesic path between two points on the surface, compution is needed on a large part of the surface when geodesic paths on images and 3D meshes. We use a heuris- tic to drive the front propagation procedure

Paris-Sud XI, Université de

52

A note on geodesic foliations on the torus Pierre Mounoud  

E-Print Network (OSTI)

A note on geodesic foliations on the torus Pierre Mounoud R´esum´e : Nous ´etudions les propri´et´es de leur feuilletages orthogonaux. Abstract: We look at geodesic foliations on the Lorentzian torus with leaves of different kind. We prove that they do not exist if the torus is geodesically

Mounoud, Pierre

53

STAR-FREE GEODESIC LANGUAGES FOR GROUPS SUSAN HERMILLER1  

E-Print Network (OSTI)

STAR-FREE GEODESIC LANGUAGES FOR GROUPS SUSAN HERMILLER1 , DEREK F. HOLT, AND SARAH REES Abstract cancellation con- ditions C (1/6) and C (1/4) - T (4) has the property that the set of all geodesics (over the same generating set) is a star-free regular language. Star-free regularity of the geodesic set is shown

Logan, David

54

Geodesic image regression with a sparse parameterization of diffeomorphisms  

E-Print Network (OSTI)

Geodesic image regression with a sparse parameterization of diffeomorphisms James Fishbaugh1 statistical analysis on longitudinal images. Geodesic models are particularly well suited for statistical, existing geodesic im- age regression models are parameterized by a large number of initial momenta, equal

Gerig, Guido

55

Fast Geodesic Active Contours Roman Goldenberg, Ron Kimmel,  

E-Print Network (OSTI)

Fast Geodesic Active Contours Roman Goldenberg, Ron Kimmel, Ehud Rivlin, and Michael Rudzsky use an unconditionally stable numerical scheme to im­ plement a fast version of the geodesic active objects by a dynamic model known as the `geodesic active contour' introduced in [4--7], see also [18, 28

Kimmel, Ron

56

Accurate Static Pose Estimation Combining Direct Regression and Geodesic Extrema  

E-Print Network (OSTI)

Accurate Static Pose Estimation Combining Direct Regression and Geodesic Extrema Brian Holt, Eng with the extraction of geodesic extrema to find extremities. We show how these approaches are complementary obtained by exploiting the geodesic structure supports accurate estimation of extremal points which cor

Bowden, Richard

57

GEODESIC NEIGHBORHOODS FOR PIECEWISE AFFINE INTERPOLATION OF SPARSE DATA  

E-Print Network (OSTI)

GEODESIC NEIGHBORHOODS FOR PIECEWISE AFFINE INTERPOLATION OF SPARSE DATA Gabriele Facciolo, Vicent of a reference image. The idea consists in defining for each sample a geodesic neighborhood and then fit a model. The core of the algorithm is a fast method for computing geodesic distances between image points, which has

58

GEODESIC FLOW, LEFT-HANDEDNESS, AND TEMPLATES PIERRE DEHORNOY  

E-Print Network (OSTI)

GEODESIC FLOW, LEFT-HANDEDNESS, AND TEMPLATES PIERRE DEHORNOY Abstract. We establish that, for every hyperbolic orbifolds of type (2, q, ) and for the orbifold of type (2, 3, 7), the geodesic flow orbits (i) bounds a Birkhoff section for the geodesic flow, and (ii) is a fibered link. These results

Paris-Sud XI, Université de

59

Visibility in Discrete Geometry: an application to discrete geodesic paths  

E-Print Network (OSTI)

Visibility in Discrete Geometry: an application to discrete geodesic paths David Coeurjolly that are visible from a source pixel. Based on these definitions, we define discrete geodesic paths in dis- crete domain with obstacles. This allows us to introduce a new geodesic metric in discrete geometry

Paris-Sud XI, Université de

60

Geodesic completeness for meromorphic metrics; the case of coercive ones  

E-Print Network (OSTI)

Geodesic completeness for meromorphic metrics; the case of coercive ones Claudio Meneghini August 5, 2004 #12;0.1. FOREWORD 1 0.1 Foreword This thesis is concerned with extending the idea of geodesic now confine ourselves to remarking that geodesics, and, more generally, paths, will be defined

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Geodesic Remeshing Using Front Propagation Gabriel Peyre Laurent Cohen  

E-Print Network (OSTI)

Geodesic Remeshing Using Front Propagation Gabriel Peyr´e Laurent Cohen CMAP CEREMADE, UMR CNRS, we present a method for remeshing trian- gulated manifolds by using geodesic path calculations is automatically found. A geodesic Delaunay triangulation of the set of points is then created, using a Voronoi

Paris-Sud XI, Université de

62

Geodesic shape regression in the framework of currents  

E-Print Network (OSTI)

Geodesic shape regression in the framework of currents James Fishbaugh1 , Marcel Prastawa1 , Guido fully parameterize the geodesic shape evolution. This is in contrast to previous shape re- gression on the shape space and the corresponding re- gression function. In [5], a piecewise geodesic method has been

Prastawa, Marcel

63

Generic measures for geodesic flows on nonpositively curved manifolds  

E-Print Network (OSTI)

Generic measures for geodesic flows on nonpositively curved manifolds Yves Coud`ene, Barbara the generic invariant probability measures for the geodesic flow on connected complete nonpositively curved subset of the set of all probability measures invariant by the geodesic flow. The proof of K. Sigmund

Paris-Sud XI, Université de

64

Geodesic shape regression in the framework of currents  

E-Print Network (OSTI)

Geodesic shape regression in the framework of currents James Fishbaugh1 , Marcel Prastawa1 , Guido fully parameterize the geodesic shape evolution. This is in contrast to previous shape re- gression and the corresponding re- gression function. In [5], a piecewise geodesic method has been proposed, which extends

Gerig, Guido

65

Shapes of geodesic nets. Alexander Nabutovsky and Regina Rotman  

E-Print Network (OSTI)

Shapes of geodesic nets. Alexander Nabutovsky and Regina Rotman August 14, 2006 Abstract Let M n infinitely many geometrically distinct geodesic nets on this manifold. We will also show that either the length of a shortest pe­ riodic geodesic is bounded in terms of the volume of a manifold M n

Nabutovsky, Alexander

66

How to project `circular' manifolds using geodesic distances?  

E-Print Network (OSTI)

How to project `circular' manifolds using geodesic distances? John Aldo Lee, Michel Verleysen,verleysen}@dice.ucl.ac.be Abstract. Recent papers have clearly shown the advantage of using the geodesic distance instead strongly crumpled manifolds have to be un- folded. Nevertheless, neither the Euclidean nor the geodesic

Verleysen, Michel

67

LORENTZIAN GEODESIC FLOWS BETWEEN HYPERSURFACES IN EUCLIDEAN SPACES  

E-Print Network (OSTI)

LORENTZIAN GEODESIC FLOWS BETWEEN HYPERSURFACES IN EUCLIDEAN SPACES JAMES DAMON VERY PRELIMINARY induced by a "Geodesic Flow"in an associated space There are several approaches to this question. One and their boundaries. Then, if t, 1 t 1, is a geodesic in Diff(Rn ) beginning at the identity, then t() (or t

68

Degree of geodesic mobility of Lorentzian metric Aleksandra Fedorova  

E-Print Network (OSTI)

Degree of geodesic mobility of Lorentzian metric Aleksandra Fedorova FSU, Jena March 24, 2012 Aleksandra Fedorova ( FSU, Jena ) Degree of mobility March 24, 2012 1 / 22 #12;Outline 1 Degree of geodesic March 24, 2012 2 / 22 #12;Geodesically equivalent connections M -- manifold, and ¯ are affine

Rossak, Wilhelm R.

69

Sparse Geodesic Paths Mark A. Davenport and Richard G. Baraniuk  

E-Print Network (OSTI)

Sparse Geodesic Paths Mark A. Davenport and Richard G. Baraniuk Department of Electrical of the sparse geodesic path between two points, by which we mean the shortest path between the points geodesic path can be easily generated. The distance provides a natural similarity measure that can be ex

70

Geodesic Disks and Clustering in a Simple Magdalene G. Borgelt  

E-Print Network (OSTI)

Geodesic Disks and Clustering in a Simple Polygon Magdalene G. Borgelt Marc van Kreveld Jun Luo.cs.uu.nl ISSN: 0924-3275 #12;Geodesic Disks and Clustering in a Simple Polygon Magdalene G. Borgelt European points lying in the interior of P. A geodesic disk GD(p, r) with center p and radius r is the set

Utrecht, Universiteit

71

Geodesic Regression on Riemannian Manifolds P. Thomas Fletcher  

E-Print Network (OSTI)

Geodesic Regression on Riemannian Manifolds P. Thomas Fletcher School of Computing, University a manifold-valued random variable and a real-valued independent parameter. The principle is to fit a geodesic is evaluated as the sum-of-squared geodesic distances from the model to the data, and this provides

Boyer, Edmond

72

Pseudo-Riemannian Geodesic Foliations by Circles Pierre Mounoud  

E-Print Network (OSTI)

Pseudo-Riemannian Geodesic Foliations by Circles Pierre Mounoud Univ. Bordeaux, IMB, UMR 5251 F investigate under which assumptions an orientable pseudo-Riemannian geodesic foliations by circles Lorentzian sur- face all of whose spacelike/timelike geodesics are closed, is finitely covered by S1 Ã? R

Paris-Sud XI, Université de

73

GEODESIC FLOW, LEFT-HANDEDNESS, AND TEMPLATES PIERRE DEHORNOY  

E-Print Network (OSTI)

GEODESIC FLOW, LEFT-HANDEDNESS, AND TEMPLATES PIERRE DEHORNOY Abstract. We establish that, for every hyperbolic orbifolds of type (2, q, ) and for every orbifold of type (2, 3, 4g+2), the geodesic of periodic orbits (i) bounds a Birkhoff section for the geodesic flow, and (ii) is a fibered link

Boyer, Edmond

74

GEODESIC FRCHET DISTANCE WITH POLYGONAL OBSTACLES Atlas F. Cook IV  

E-Print Network (OSTI)

GEODESIC FR�CHET DISTANCE WITH POLYGONAL OBSTACLES Atlas F. Cook IV Carola Wenk Abstract We present the first algorithm to compute the geodesic Fréchet distance between two polygonal curves in a plane of from a point source). This shortest path map supports geodesic distance queries from any point s ab

Texas at San Antonio, University of

75

Heuristically Driven Front Propagation for Fast Geodesic Extraction  

E-Print Network (OSTI)

Heuristically Driven Front Propagation for Fast Geodesic Extraction Gabriel Peyr´e Laurent D. Cohen to quickly extract geodesic paths on images and 3D meshes. We use a heuristic to drive the front propagation that is similar to the A algorithm used in artificial intelli- gence. In order to find very quickly geodesic paths

Paris-Sud XI, Université de

76

INTEGRABILITY OF GEODESIC FLOWS AND ISOSPECTRALITY OF RIEMANNIAN MANIFOLDS  

E-Print Network (OSTI)

INTEGRABILITY OF GEODESIC FLOWS AND ISOSPECTRALITY OF RIEMANNIAN MANIFOLDS DOROTHEE SCHUETH are isospectral for the Laplace operator on functions and such that M has completely integrable geodesic flow of the submanifolds of the unit tangent bundle given by two maximal continuous families of closed geodesics

Schüth, Dorothee

77

Discrete geodesic regression in shape space Benjamin Berkels1  

E-Print Network (OSTI)

Discrete geodesic regression in shape space Benjamin Berkels1 , P. Thomas Fletcher2 , Behrend Benedikt.Wirth@cims.nyu.edu Abstract. A new approach for the effective computation of geodesic re- gression curves in shape spaces is presented. Here, one asks for a geodesic curve on the shape manifold

Rumpf, Martin

78

A bi-Hamiltonian supersymmetric geodesic equation  

E-Print Network (OSTI)

A supersymmetric extension of the Hunter-Saxton equation is constructed. We present its bi-Hamiltonian structure and show that it arises geometrically as a geodesic equation on the space of superdiffeomorphisms of the circle that leave a point fixed endowed with a right-invariant metric.

Jonatan Lenells

2008-06-29T23:59:59.000Z

79

THE GEODESIC RAY TRANSFORM ON RIEMANNIAN SURFACES ...  

E-Print Network (OSTI)

the geodesic ?(y, ?, t) is never zero, we get that the (3n ? 2) × (2n ? 1) matrix J has maximal .... a graph of the canonical map C defined in (3.10). ..... We use the code developed in Matlab by the first author, whose detail may be found in [22].

2014-11-24T23:59:59.000Z

80

Generation of Geodesic Acoustic Modes in ITG turbulence  

SciTech Connect

The generation of geodesic acoustic modes (GAM) is studied by means of numerical simulations of a 3D fluid global model, describing flux-driven electrostatic ITG (Ion Temperature Gradient) turbulence in the core of tokamak plasmas. The model evolves the equilibrium and the perturbed fields as a whole. The coupling of poloidal harmonics induced by the curvature thus results in the presence of both turbulent and neoclassical transport effects in the system. The neoclassical thermal conductivity, which is linked to the time-independent component of the poloidal modulation of the equilibrium fields, is observed to be of the order of the turbulent one, in a system driven by strong injected heat fluxes. The frequency spectrum of the electrostatic potential fluctuations exhibits a peak near the theoretical GAM frequency. In the turbulent stationary state of the simulations a downshift of the GAM frequency is observed.

Falchetto, G. L.; Garbet, X.; Ottaviani, M. [Association EURATOM-CEA, CEA/DSM/DRFC, Centre de Cadarache, 13108 Saint Paul lez Durance (France); Smolyakov, A. [Department of Physics and Engineering Physics, University of Saskatchewan, SK (Canada)

2006-11-30T23:59:59.000Z

Note: This page contains sample records for the topic "geodesic grid coupled" 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.


81

A non-geodesic motion in the R^-1 theory of gravity tuned with observations  

E-Print Network (OSTI)

In the general picture of high order theories of gravity, recently, the R^-1 theory has been analyzed in two different frameworks. In this letter a third context is added, considering an explicit coupling between the R^-1 function of the Ricci scalar and the matter Lagrangian. The result is a non-geodesic motion of test particles which, in principle, could be connected with Dark Matter and Pioneer anomaly problems.

Christian Corda

2008-01-11T23:59:59.000Z

82

Analysis of interoperability issues between EGEE and VEGA grid infrastructures  

Science Journals Connector (OSTI)

Recent Grid initiatives brought a few large Grid infrastructures deployed over the world. However most of them are not easily interoperable and creation of Virtual Organizations that could include resources from a couple of different Grid systems is ...

Bartosz Kryza; ?ukasz Skita?; Jacek Kitowski; Maozhen Li; Takebumi Itagaki

2006-09-01T23:59:59.000Z

83

On the Geodesic Nature of Wegner's Flow  

E-Print Network (OSTI)

Wegner's method of flow equations offers a useful tool for diagonalizing a given Hamiltonian and is widely used in various branches of quantum physics. Here, generalizing this method, a condition is derived, under which the corresponding flow of a quantum state becomes geodesic in a submanifold of the projective Hilbert space, independently of specific initial conditions. This implies the geometric optimality of the present method as an algorithm of generating stationary states. The result is illustrated by analyzing some physical examples.

Yuichi Itto; Sumiyoshi Abe

2012-02-08T23:59:59.000Z

84

Geodesic deviation at higher orders via covariant bitensors  

E-Print Network (OSTI)

We review a simple but instructive application of the formalism of covariant bitensors, to use a deviation vector field along a fiducial geodesic to describe a neighboring worldline, in an exact and manifestly covariant manner, via the exponential map. Requiring the neighboring worldline to be a geodesic leads to the usual linear geodesic deviation equation for the deviation vector, plus corrections at higher order in the deviation and relative velocity. We show how these corrections can be efficiently computed to arbitrary orders via covariant bitensor expansions, deriving a form of the geodesic deviation equation valid to all orders, and producing its explicit expanded form through fourth order. We also discuss the generalized Jacobi equation, action principles for the higher-order geodesic deviation equations, results useful for describing accelerated neighboring worldlines, and the formal general solution to the geodesic deviation equation through second order.

Justin Vines

2014-07-25T23:59:59.000Z

85

Geodesic Structure of the Noncommutative Schwarzschild Anti-de Sitter Black Hole I: Timelike Geodesics  

E-Print Network (OSTI)

By considering particles as smeared objects, we investigate the effects of space noncommutativity on the geodesic structure in Schwarzschild-AdS spacetime. By means of a detailed analysis of the corresponding effective potentials for particles, we find the possible motions which are allowed by the energy levels. Radial and non-radial trajectories are treated and the effects of space noncommutativity on the value of the precession of the perihelion are estimated. We show that the geodesic structure of this black hole presents new types of motion not allowed by the Schwarzschild spacetime.

Alexis Larranaga

2011-10-04T23:59:59.000Z

86

THE GEODESIC X-RAY TRANSFORM WITH FOLD CAUSTICS The ...  

E-Print Network (OSTI)

Aug 28, 2012 ... THE GEODESIC X-RAY TRANSFORM WITH FOLD CAUSTICS. PLAMEN STEFANOV AND GUNTHER UHLMANN. ABSTRACT. We give a ...

2012-08-28T23:59:59.000Z

87

Symmetries of geodesic motion in Gödel-type spacetimes  

E-Print Network (OSTI)

In this paper, we study Noether gauge symmetries of geodesic motion for geodesic Lagrangian of four classes of metrics of G\\"{o}del-type spacetimes for which we calculated the Noether gauge symmetries for all classes I-IV, and find the first integrals of corresponding classes to derive a complete characterization of the geodesic motion. Using the obtained expressions for $\\dot{t}, \\dot{r}, \\dot{\\phi}$ and $\\dot{z}$ of each classes I-IV which depends essentially on two independent parameters $m$ and $w$, we explicitly integrated the geodesic equations of motion for the corresponding G\\"{o}del-type spacetimes.

U. Camci

2014-05-15T23:59:59.000Z

88

Geodesic Motion in the (Charged) Doubly Spinning Black Ring Spacetime  

E-Print Network (OSTI)

In this article we analyze the geodesics of test particles and light in the five dimensional (charged) doubly spinning black ring spacetime. Apparently it is not possible to separate the Hamilton-Jacobi-equation for (charged) doubly spinning black rings in general, so we concentrate on special cases: null geodesics in the ergosphere and geodesics on the two rotational axes of the (charged) doubly spinning black ring. We present analytical solutions to the geodesic equations for these special cases. Using effective potential techniques we study the motion of test particles and light and discuss the corresponding orbits.

Saskia Grunau; Valeria Kagramanova; Jutta Kunz

2012-12-03T23:59:59.000Z

89

Geodesic Distance in Planar Graphs: An Integrable Approach  

E-Print Network (OSTI)

We discuss the enumeration of planar graphs using bijections with suitably decorated trees, which allow for keeping track of the geodesic distances between faces of the graph. The corresponding generating functions obey non-linear recursion relations on the geodesic distance. These are solved by use of stationary multi-soliton tau-functions of suitable reductions of the KP hierarchy. We obtain a unified formulation of the (multi-) critical continuum limit describing large graphs with marked points at large geodesic distances, and obtain integrable differential equations for the corresponding scaling functions. This provides a continuum formulation of two-dimensional quantum gravity, in terms of the geodesic distance.

P. Di Francesco

2005-06-27T23:59:59.000Z

90

Smart Grid  

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

The Energy Department is investing in strategic partnerships to accelerate the Smart Grid -- a two-way, intuitive system that will result in more efficient and reliable electricity for all grid users.

91

Grid Integration  

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

The Wind Program works with electric grid operators, utilities, regulators, and industry to create new strategies for incorporating increasing amounts of wind energy into the power system while maintaining economic and reliable operation of the grid.

92

14.11. GEODESIC LINES, LOCAL GAUSS-BONNET THEOREM 779 14.11 Geodesic Lines, Local Gauss-Bonnet Theorem  

E-Print Network (OSTI)

14.11. GEODESIC LINES, LOCAL GAUSS-BONNET THEOREM 779 14.11 Geodesic Lines, Local Gauss-Bonnet Theorem Geodesics play a very important role in surface theory and in dynamics. One of the main reasons why geodesics are so important is that they generalize to curved surfaces the notion of \\shortest path

Gallier, Jean

93

Tubular Enhanced Geodesic Active Contours for Continuum Robot Detection using 3D Ultrasound  

E-Print Network (OSTI)

Tubular Enhanced Geodesic Active Contours for Continuum Robot Detection using 3D Ultrasound continuum robots in 3D ultrasound images. The proposed approach combines geodesic active contours Enhanced Geodesic Active Contours (TEGAC), is demonstrated through ex vivo intracardiac experiments

Dupont, Pierre

94

An Intelligent Control System for Distributed Mini Grids  

Science Journals Connector (OSTI)

A new power system that consists of loosely coupled mini grids is providing a number of challenging problems ... of the large power stations and loosely coupled mini grids. The paper focused on the features of th...

Yasuo Takagi; Dai Murayama; Kenji Mitsumoto

2005-01-01T23:59:59.000Z

95

Spin-geodesic deviations in the Schwarzschild spacetime  

E-Print Network (OSTI)

The deviation of the path of a spinning particle from a circular geodesic in the Schwarzschild spacetime is studied by an extension of the idea of geodesic deviation. Within the Mathisson-Papapetrou-Dixon model and assuming the spin parameter to be sufficiently small so that it makes sense to linearize the equations of motion in the spin variables as well as in the geodesic deviation, the spin-curvature force adds an additional driving term to the second order system of linear ordinary differential equations satisfied by nearby geodesics. Choosing initial conditions for geodesic motion leads to solutions for which the deviations are entirely due to the spin-curvature force, and one finds that the spinning particle position for a given fixed total spin oscillates roughly within an ellipse in the plane perpendicular to the motion, while the azimuthal motion undergoes similar oscillations plus an additional secular drift which varies with spin orientation.

Donato Bini; Andrea Geralico; Robert T. Jantzen

2014-08-21T23:59:59.000Z

96

Geodesic structure of Janis-Newman-Winicour space-time  

E-Print Network (OSTI)

In the present paper we study the geodesic structure of the Janis-Newman-Winicour(JNW) space-time which contains a strong curvature naked singularity. This metric is an extension of the Schwarzschild geometry when a massless scalar field is included. We find that the strength parameter $\\mu$ of the scalar field effects on the geodesic structure of the JNW space-time. By solving the geodesic equation and analyzing the behavior of effective potential, we investigate all geodesic types of the test particle and the photon in the JNW space-time. At the same time we simulate all the geodesic orbits corresponding to the energy levels of the effective potential in the JNW space-time.

Sheng Zhou; Ruanjing Zhang; Juhua Chen; Yongjiu Wang

2014-08-26T23:59:59.000Z

97

smart grid | OpenEI  

Open Energy Info (EERE)

smart grid smart grid Dataset Summary Description This dataset represents a historical repository of all the numerical data from the smartgrid.gov website condensed into spreadsheets to enable analysis of the data. Below are a couple of things worth noting: Source Smartgrid.gov Date Released March 04th, 2013 (9 months ago) Date Updated March 04th, 2013 (9 months ago) Keywords AMI costs distribution smart grid transmission Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon SmartGrid.gov Quarterly Data Summary 4Q12 (xlsx, 112.1 KiB) application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon SmartGrid.gov Quarterly Data Summary 3Q12 (xlsx, 107.9 KiB) application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon SmartGrid.gov Quarterly Data Summary 2Q12 (xlsx, 111.9 KiB)

98

Geodesic Completeness for Sobolev Metrics on the Space of Immersed Plane Curves  

E-Print Network (OSTI)

Geodesic Completeness for Sobolev Metrics on the Space of Immersed Plane Curves Martins Bruveris on the space of immersed plane curves. We show that the geodesic equation for Sobolev-type met- rics is geodesically com- plete. We find lower bounds for the geodesic distance in terms of curvature and its

Michor, Peter W.

99

The Complexity of Geodesic Voronoi Diagrams on Triangulated 2-Manifold Surfaces  

E-Print Network (OSTI)

The Complexity of Geodesic Voronoi Diagrams on Triangulated 2-Manifold Surfaces Yong-Jin Liu1 , Kai 2-manifold surface, based on the geodesic metric. Given a triangulated 2-manifold T of n faces T, the Voronoi diagram of a set of point sites based on the geodesic metric (called below geodesic

Tang, Kai

100

SPHERES WITH POSITIVE CURVATURE AND NEARLY DENSE ORBITS FOR THE GEODESIC FLOW.  

E-Print Network (OSTI)

SPHERES WITH POSITIVE CURVATURE AND NEARLY DENSE ORBITS FOR THE GEODESIC FLOW. KEITH BURNS, that is within " of the round metric and has a geodesic for which the corresponding orbit of the geodesic ow on S n ; n #21; 3, that is within " of the round metric and has a geodesic for which the complement

Burns, Keith

Note: This page contains sample records for the topic "geodesic grid coupled" 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

COMPARISON OF FRACTIONAL AND GEODESIC ANISOTROPY IN DIFFUSION TENSOR IMAGES OF 90 MONOZYGOTIC AND DIZYGOTIC TWINS  

E-Print Network (OSTI)

COMPARISON OF FRACTIONAL AND GEODESIC ANISOTROPY IN DIFFUSION TENSOR IMAGES OF 90 MONOZYGOTIC anisotropy (FA), and geodesic anisotropy (GA), which measures the geodesic distance between tensors be used to map disease effects on white matter. A related scalar measure, the Geodesic Anisotropy (GA) [3

Thompson, Paul

102

SPHERES WITH POSITIVE CURVATURE AND NEARLY DENSE ORBITS FOR THE GEODESIC FLOW.  

E-Print Network (OSTI)

SPHERES WITH POSITIVE CURVATURE AND NEARLY DENSE ORBITS FOR THE GEODESIC FLOW. KEITH BURNS, that is within '' of the round metric and has a geodesic for which the corresponding orbit of the geodesic flow on S n ; n â?? 3, that is within '' of the round metric and has a geodesic for which the complement

103

Geodesic Paths on Triangular Meshes DIMAS MARTINEZ, LUIZ VELHO, PAULO CEZAR CARVALHO  

E-Print Network (OSTI)

Geodesic Paths on Triangular Meshes DIMAS MART´INEZ, LUIZ VELHO, PAULO CEZAR CARVALHO IMPA dimasmm,lvelho,pcezar @visgraf.impa.br Abstract. We present a new algorithm to compute a geodesic path Geodesics theory, we are able to generate an iterative process to obtain a good discrete geodesic

104

ccsd-00003224,version1-4Nov2004 Clifton-Pohl torus and geodesic completeness  

E-Print Network (OSTI)

ccsd-00003224,version1-4Nov2004 Clifton-Pohl torus and geodesic completeness by a 'complex' point generalization of the idea of completeness guarantee geodesic completeness of Clifton- Pohl torus; we explicitely compute all of its geodesics. Keywords: Clifton-Pohl torus, geodesic completeness, holomorphic metric

Paris-Sud XI, Université de

105

2D and 3D Visibility in Discrete Geometry: an application to discrete geodesic paths  

E-Print Network (OSTI)

1 2D and 3D Visibility in Discrete Geometry: an application to discrete geodesic paths D discrete geodesic paths in discrete domain with obstacles. This allows us to introduce a new geodesic metric in discrete geometry. Keywords: discrete visibility, geodesic path, distance transform, discrete

Boyer, Edmond

106

Smart Grid Investments Improve Grid Reliability, Resilience,...  

Energy Savers (EERE)

Investments Improve Grid Reliability, Resilience, and Storm Responses (November 2014) Smart Grid Investments Improve Grid Reliability, Resilience, and Storm Responses (November...

107

Collisional damping of the geodesic acoustic mode  

SciTech Connect

The frequency and damping rate of the geodesic acoustic mode (GAM) is revisited by using a gyrokinetic model with a number-conserving Krook collision operator. It is found that the damping rate of the GAM is non-monotonic as the collision rate increases. At low ion collision rate, the damping rate increases linearly with the collision rate; while as the ion collision rate is higher than v{sub ti}/R, where v{sub ti} and R are the ion thermal velocity and major radius, the damping rate decays with an increasing collision rate. At the same time, as the collision rate increases, the GAM frequency decreases from the (7/4+{tau})v{sub ti}/R to (1+{tau})v{sub ti}/R, where {tau} is the ratio of electron temperature to ion temperature.

Gao Zhe [Department of Engineering Physics, Tsinghua University, Beijing 100084 (China)

2013-03-15T23:59:59.000Z

108

On MOND, extended gravity and non-geodesic motion  

E-Print Network (OSTI)

Starting from the origin of Einstein general relativity (GR) the request of Mach on the theory's structure has been the core of the foundational debate. That problem is strictly connected with the nature of the mass-energy equivalence. It is well known that this is exactly the key point that Einstein used to realize a metric theory of gravitation having an unequalled beauty and elegance. On the other hand, the current requirements of particle physics and the open questions within extended gravity theories request a better understanding of Equivalence Principle (EP). The MOND theory by Milgrom proposes a modify of Newtonian dynamics and a variation of the ratio m_{i}/m_{g}, to be tested, at least, within the solar system. In this paper we attack this important issue from the general point of view of a weak modification of GR which considers a direct coupling between the Ricci curvature scalar and the matter Lagrangian. It is shown that a non geodesic ratio m_{i}/m_{g} can be fixed and that Milgrom acceleration is retrieved at low energies.

Elmo Benedetto; Ignazio Licata; Christian Corda

2014-11-04T23:59:59.000Z

109

Geodesic Distance in Fisher Information Space and Holographic Entropy Formula  

E-Print Network (OSTI)

In this short note, we examine geodesic distance in Fisher information space in which the metric is defined by the entanglement entropy in CFT_(1+1). It is obvious in this case that the geodesic distance at a constant time is a function of the entropy data embedded into the information space. In a special case, the geodesic equation can be solved analytically, and we find that the distance agrees well with the Ryu-Takayanagi formula. Then, we can understand how the distance looks at the embeded quantum information. The result suggests that the Fisher metric is an efficient tool for constructing the holographic spacetime.

Hiroaki Matsueda

2014-08-28T23:59:59.000Z

110

Geodesic Structure of the Schwarzschild Black Hole in Rainbow Gravity  

E-Print Network (OSTI)

In this paper we study the geodesic structure of the Schwarzschild black hole in rainbow gravity analyzing the behavior of null and time-like geodesic. We find that the structure of the geodesics essentially does not change when the semi-classical effects are included. However, we can distinguish different scenarios if we take into account the effects of rainbow gravity. Depending on the type of rainbow functions under consideration, inertial and external observers see very different situations in radial and non radial motion of a test particles.

Carlos Leiva; Joel Saavedra; Jose Villanueva

2008-12-09T23:59:59.000Z

111

Parametric Excitation of Geodesic Acoustic Modes by Electron Drift Waves and Ion Temperature Gradient Modes in Tokamak Plasmas  

SciTech Connect

Geodesic Acoustic Modes (GAMs) have been predicted and subsequently observed in many toroidal plasma devices. Bicoherence studies on various devices have suggested three-wave mode coupling processes between GAMs and high frequency turbulence. Thus the parametric coupling of GAMS to drift waves and/or ion temperature gradient(ITG{r_brace} modes is a potential candidate for excitation of these modes. In this paper we discuss the resonant three-wave coupling mechanism for the excitation of GAMs by ITG and finite beta drift waves in homogeneous and inhomogeneous plasmas and compare theoretical predictions with observed characteristics of the GAMs.

Guzdar, P. N.; Kleva, R. G. [IREAP, University of Maryland, College Park, MD 20742 (United States); Chakrabarti, N. [SINP, Kolkata (India); Kaw, P. K.; Singh, R. [IPR, Gandhinagar, 308423 (India); Naulin, V.; Rasmussen, J. J. [EURATOM, Roskilde (Denmark)

2008-11-01T23:59:59.000Z

112

Spin-geodesic deviations in the Kerr spacetime  

E-Print Network (OSTI)

The dynamics of extended spinning bodies in the Kerr spacetime is investigated in the pole-dipole particle approximation and under the assumption that the spin-curvature force only slightly deviates the particle from a geodesic path. The spin parameter is thus assumed to be very small and the back reaction on the spacetime geometry neglected. This approach naturally leads to solve the Mathisson-Papapetrou-Dixon equations linearized in the spin variables as well as in the deviation vector, with the same initial conditions as for geodesic motion. General deviations from generic geodesic motion are studied, generalizing previous results limited to the very special case of an equatorial circular geodesic as the reference path.

Donato Bini; Andrea Geralico

2014-08-21T23:59:59.000Z

113

Geodesic multiplication as a tool for classical and quantum gravity  

E-Print Network (OSTI)

Algebraic systems called the local geodesic loops and their tangent Akivis algebras are considered. Their possible role in theory of gravity is considered. Quantum conditions for the infinitesimal quantum events are proposed.

Piret Kuusk; Eugen Paal

2008-03-08T23:59:59.000Z

114

Singularities, geodesics and Green functions in the BTZ black hole  

E-Print Network (OSTI)

In the context of studying black hole singularities by the AdS/CFT correspondence, we study the BTZ black hole by a scalar field propagating on it and the corresponding two-point Green functions. We explore how positions inside the horizon are encoded in the boundary theory. The main idea is to relate two different semi-classical approximations of the Green function and see how this indicates the bulk-boundary correspondence. From a key observation of Festucia and Liu, which is a frequency-geodesic identification, we deduce a geodesic approximation from the saddle point approximation. As an application, we find saddles of the Green function and hence their corresponding geodesics. The conclusion is that some of these geodesics do go inside the horizon. This gives the possibility of resolving the singularity from the boundary theory.

Chen Yang

2006-11-04T23:59:59.000Z

115

Geodesic Congruences in the Palatini f(R) Theory  

E-Print Network (OSTI)

We shall investigate the properties of a congruence of geodesics in the framework of Palatini f(R) theories. We shall evaluate the modified geodesic deviation equation and the Raychaudhuri's equation and show that f(R) Palatini theories do not necessarily lead to attractive forces. Also we shall study energy condition for f(R) Palatini gravity via a perturbative analysis of the Raychaudhuri's equation.

Fatimah Shojai; Ali Shojai

2008-11-18T23:59:59.000Z

116

Kinematics of geodesic flows in stringy black hole backgrounds  

E-Print Network (OSTI)

We study the kinematics of timelike geodesic congruences in two and four dimensions in spacetime geometries representing stringy black holes. The Raychaudhuri equations for the kinematical quantities (namely, expansion, shear and rotation) characterising such geodesic flows are written down and subsequently solved analytically (in two dimensions) and numerically (in four dimensions) for specific geodesics flows. We compare between geodesic flows in dual (electric and magnetic) stringy black hole backgrounds in four dimensions, by showing the differences that arise in the corresponding evolutions of the kinematic variables. The crucial role of initial conditions and the spacetime curvature on the evolution of the kinematical variables is illustrated. Some novel general conclusions on geodesic focusing are obtained from the analytical and numerical findings. We also propose new quantifiers in terms of (a) the time (affine parameter) of approach to a singularity and (b) the location of extrema in the functional evolution of the kinematic variables, which may be used to distinguish between flows in different geometries. In summary, our quantitative findings bring out hitherto unknown features of the kinematics of geodesic flows, which, otherwise, would have remained overlooked, if we confined ourselves to only a qualitative analysis.

Anirvan Dasgupta; Hemwati Nandan; Sayan Kar

2009-06-12T23:59:59.000Z

117

Null geodesics and shadow of a rotating black hole in extended Chern-Simons modified gravity  

SciTech Connect

The Chern-Simons modification to general relativity in four dimensions consists of adding to the Einstein-Hilbert term a scalar field that couples to the first-class Pontryagin density. In this theory, which has attracted considerable attention recently, the Schwarzschild metric persists as an exact solution, and this is why this model resists several observational constraints. In contrast, the spinning black hole solution of the theory is not given by the Kerr metric but by a modification of it, so far only known for slow rotation and small coupling constant. In the present paper, we show that, in this approximation, the null geodesic equation can be integrated, and this allows us to investigate the shadow cast by a black hole. We discuss how, in addition to the angular momentum of the solution, the coupling to the Chern-Simons term deforms the shape of the shadow.

Amarilla, Leonardo [Facultad de Ciencias Astronomicas y Geofisicas, Universidad Nacional de La Plata, Paseo del Bosque, 1900, La Plata (Argentina); Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon 1, 1428, Buenos Aires (Argentina); Eiroa, Ernesto F. [Instituto de Astronomia y Fisica del Espacio, C.C. 67 Suc. 28, 1428, Buenos Aires (Argentina); Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon 1, 1428, Buenos Aires (Argentina); Giribet, Gaston [Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon 1, 1428, Buenos Aires (Argentina)

2010-06-15T23:59:59.000Z

118

Plasma Shape Effects on Geodesic Acoustic Oscillations  

SciTech Connect

Geodesic acoustic mode (GAM) oscillations in tokamak plasmas are known to be sensitive to the value of the safety factor q. Through its linear and nonlinear interactions with ITG turbulence it has recently been shown in direct numerical global simulations that the turbulence driven heat transport is larger when GAM oscilations of large amplitude are present, resulting in an anomalous transport scaling with the inverse plasma current. GAM dispersion relations have been derived for circular, large aspect ratio configurations, and, recently, for helical configurations. Linear simulation results are presented using the global, PIC, finite element codes GYGLES and ORB5 for the GAM frequency, damping rate and Rosenbluth-Hinton residual zonal flow for a scan in plasma elongation. It is found that CAM frequency slightly decreases, while GAM damping rate and residual zonal flows increase with elongation. Nonlinear ITG simulations using the ORB5 code show that elongation reduces heat transport and that this is related to the plasma current and not q alone.

Villard, L.; Angelino, P.; Jolliet, S.; McMillan, B. F.; Sauter, O.; Tran, T. M. [Centre de Recherches en Physique des Plasmas, Association Euratom -- Confederation Suisse, EPFL, 1015 Lausanne (Switzerland); Bottino, A. [Max-Planck Gesellschaft Institute for Plasma Physics, D-85748 Garching (Germany); Hatzky, R. [Computer Center of the IPP, D-85748 Garching (Germany); Max-Planck Gesellschaft, D-85748 Garching (Germany)

2006-11-30T23:59:59.000Z

119

Non-parametric geodesic active regions: Method and evaluation for cerebral aneurysms segmentation in 3DRA and CTA  

E-Print Network (OSTI)

Non-parametric geodesic active regions: Method and evaluation for cerebral aneurysms segmentation compares to other alternative techniques based on deformable models, namely parametric geodesic active aneurysm; Geodesic active regions; Differential invariants; Non-parametric probability estimation; Model

Frangi, Alejandro

120

Focusing of geodesic congruences in an accelerated expanding Universe  

E-Print Network (OSTI)

We study the accelerated expansion of the Universe through its consequences on a congruence of geodesics. We make use of the Raychaudhuri equation which describes the evolution of the expansion rate for a congruence of timelike or null geodesics. In particular, we focus on the space-time geometry contribution to this equation. By straightforward calculation from the metric of a Robertson-Walker cosmological model, it follows that in an accelerated expanding Universe the space-time contribution to the Raychaudhuri equation is positive for the fundamental congruence, favoring a non-focusing of the congruence of geodesics. However, the accelerated expansion of the present Universe does not imply a tendency of the fundamental congruence to diverge. It is shown that this is in fact the case for certain congruences of timelike geodesics without vorticity. Therefore, the focusing of geodesics remains feasible in an accelerated expanding Universe. Furthermore, a negative contribution to the Raychaudhuri equation from space-time geometry which is usually interpreted as the manifestation of the attractive character of gravity is restored in an accelerated expanding Robertson-Walker space-time at high speeds.

F. D. Albareti; J. A. R. Cembranos; A. de la Cruz-Dombriz

2013-01-08T23:59:59.000Z

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Focusing of geodesic congruences in an accelerated expanding Universe  

SciTech Connect

We study the accelerated expansion of the Universe through its consequences on a congruence of geodesics. We make use of the Raychaudhuri equation which describes the evolution of the expansion rate for a congruence of timelike or null geodesics. In particular, we focus on the space-time geometry contribution to this equation. By straightforward calculation from the metric of a Robertson-Walker cosmological model, it follows that in an accelerated expanding Universe the space-time contribution to the Raychaudhuri equation is positive for the fundamental congruence, favoring a non-focusing of the congruence of geodesics. However, the accelerated expansion of the present Universe does not imply a tendency of the fundamental congruence to diverge. It is shown that this is in fact the case for certain congruences of timelike geodesics without vorticity. Therefore, the focusing of geodesics remains feasible in an accelerated expanding Universe. Furthermore, a negative contribution to the Raychaudhuri equation from space-time geometry which is usually interpreted as the manifestation of the attractive character of gravity is restored in an accelerated expanding Robertson-Walker space-time at high speeds.

Albareti, F.D.; Cembranos, J.A.R. [Departamento de Física Teórica I, Universidad Complutense de Madrid, Ciudad Universitaria, E-28040 Madrid (Spain); Cruz-Dombriz, A. de la, E-mail: fdalbareti@estumail.ucm.es, E-mail: cembra@fis.ucm.es, E-mail: alvaro.delacruz-dombriz@uct.ac.za [Astrophysics, Cosmology and Gravity Centre (ACGC), University of Cape Town, 7701 Rondebosch, Cape Town (South Africa)

2012-12-01T23:59:59.000Z

122

Homogeneous geodesics and the critical points of the restricted Finsler function  

Science Journals Connector (OSTI)

In this paperwe study the set of homogeneous geodesics of a left-invariant Finsler metric on Lie groups. We first give a simple criterion that characterizes geodesic vectors. We extend J. Szenthe’s result on h...

Parastoo Habibi; Dariush Latifi…

2011-02-01T23:59:59.000Z

123

de Sitter geodesics: reappraising the notion of motion  

E-Print Network (OSTI)

The de Sitter spacetime is transitive under a combination of translations and proper conformal transformations. Its usual family of geodesics, however, does not take into account this property. As a consequence, there are points in de Sitter spacetime which cannot be joined to each other by any one of these geodesics. By taking into account the appropriate transitivity properties in the variational principle, a new family of maximizing trajectories is obtained, whose members are able to connect any two points of the de Sitter spacetime. These geodesics introduce a new notion of motion, given by a combination of translations and proper conformal transformations, which may possibly become important at very-high energies, where conformal symmetry plays a significant role.

J. G. Pereira; A. C. Sampson

2012-03-01T23:59:59.000Z

124

The geodesic rule for higher codimensional global defects  

E-Print Network (OSTI)

We generalize the geodesic rule to the case of formation of higher codimensional global defects. Relying on energetic arguments, we argue that, for such defects, the geometric structures of interest are the totally geodesic submanifolds. On the other hand, stochastic arguments lead to a diffusion equation approach, from which the geodesic rule is deduced. It turns out that the most appropriate geometric structure that one should consider is the convex hull of the values of the order parameter on the causal volumes whose collision gives rise to the defect. We explain why these two approaches lead to similar results when calculating the density of global defects by using a theorem of Cheeger and Gromoll. We present a computation of the probability of formation of strings/vortices in the case of a system, such as nematic liquid crystals, whose vacuum is $\\mathbb{R}P^2$.

Anthony J. Creaco; Nikos Kalogeropoulos

2008-05-15T23:59:59.000Z

125

Geodesic Nucleation and Evolution of a de Sitter Brane  

E-Print Network (OSTI)

Within the framework of Geodesic Brane Gravity, the deviation from General Relativity is parameterized by the conserved bulk energy. The corresponding geodesic evolution/nucleation of a de-Sitter brane is shown to be exclusively driven by a double-well Higgs potential, rather than by a plain cosmological constant. The (hairy) horizon serves then as the locus of unbroken $Z_{2}$ symmetry. The quartic structure of the scalar potential, singled out on finiteness grounds of the total (including the dark component) energy density, chooses the Hartle-Hawking no-boundary proposal.

Aharon Davidson; David Karasik; Yoav Lederer

2005-09-30T23:59:59.000Z

126

Influence of quantum matter fluctuations on geodesic deviation  

E-Print Network (OSTI)

We study the passive influence of quantum matter fluctuations on the expansion parameter of a congruence of timelike geodesics in a semiclassical regime. In particular, we show that, the perturbations of this parameter can be considered to be elements of the algebra of matter fields at all perturbative order. Hence, once a quantum state for matter is chosen, it is possible to explicitly evaluate the behavior of geometric fluctuations. After introducing the formalism necessary to treat similar problems, in the last part of the paper, we estimate the approximated probability of having a geodesic collapse in a flat spacetime due to those fluctuations.

Nicolò Drago; Nicola Pinamonti

2014-09-12T23:59:59.000Z

127

Orthogonality of Homogeneous geodesics on the tangent bundle  

E-Print Network (OSTI)

Let $\\xi=(G\\times_{K} \\mathcal{G} / \\mathcal{K}, \\rho_{\\xi}, \\emph{G} / \\emph{K},\\mathcal{G} / \\mathcal{K})$ be the associated bundle and $\\tau_{G/K}=(T_{G/K},\\pi_{G/K},G/K, \\textrm{R}^{m})$ be the tangent bundle of special examples of odd dimension solvable Lie groups equipped with left invariant Riemannian metric. In this paper we prove some conditions about the existence of homogeneous geodesic on the base space of $\\tau_{G/K}$ and homogeneous (geodesic) vectors on the fiber space of $\\xi$ .

Khatamy, R Chavosh

2011-01-01T23:59:59.000Z

128

ccsd-00102606,version1-2Oct2006 Integrable geodesic flows and  

E-Print Network (OSTI)

ccsd-00102606,version1-2Oct2006 Integrable geodesic flows and Multi-Centre versus Bianchi A metrics that most, but not all, of the four dimensional metrics in the Multi- Centre family with integrable geodesic diagonal bi-axial Bianchi II metric has an integrable geodesic flow, and that the simplest hyperk

Paris-Sud XI, Université de

129

ccsd-00003326,version2-9Dec2005 On geodesic envelopes  

E-Print Network (OSTI)

ccsd-00003326,version2-9Dec2005 On geodesic envelopes Gianmarco Capitanio December 9, 2005 Abstract We give a global description of envelopes of geodesic tangents of regular curves in (not necessarily inflectional geodesics and its tangential caustics (formed by the conjugate points to those of the initial

130

Parametric representation of a surface pencil with a common spatial geodesic  

E-Print Network (OSTI)

Parametric representation of a surface pencil with a common spatial geodesic Guo-Jin Wanga , Kai a given spatial geodesic curve. We derive a parametric representation for a surface pencil whose members share the same geodesic curve as an isoparametric curve. By utilizing the Frenet trihedron frame along

Tai, Chiew-Lan

131

TIME DISCRETE GEODESIC PATHS IN THE SPACE OF IMAGES B. BERKELS, A. EFFLAND, M. RUMPF  

E-Print Network (OSTI)

TIME DISCRETE GEODESIC PATHS IN THE SPACE OF IMAGES B. BERKELS, A. EFFLAND, M. RUMPF Abstract and intensity variation. A robust and effective variational time discretization of geodesics paths is proposed requirements for the input images, the existence of discrete geodesic paths defined as minimizers

Rumpf, Martin

132

Geodesic Remeshing Using Front Propagation Gabriel Peyre (peyre@cmapx.polytechnique.fr)  

E-Print Network (OSTI)

Geodesic Remeshing Using Front Propagation Gabriel Peyr´e (peyre@cmapx.polytechnique.fr) CMAP modeling and processing that uses only fast geodesic computations. The basic building block, an intrinsic algo- rithm for computing geodesic centroidal tessellations, and a fast and robust method

Paris-Sud XI, Université de

133

Accurate Computation of Geodesic Distance Fields for Polygonal Curves on Triangle Meshes  

E-Print Network (OSTI)

Accurate Computation of Geodesic Distance Fields for Polygonal Curves on Triangle Meshes David,kobbelt}@cs.rwth-aachen.de Abstract We present an algorithm for the efficient and accu- rate computation of geodesic distance fields the original algorithm is able to compute geodesic distances to isolated points on the mesh only, our

Frey, Pascal

134

A GEOMETRIC CONTROL PROOF OF LINEAR FRANKS' LEMMA FOR GEODESIC FLOWS  

E-Print Network (OSTI)

A GEOMETRIC CONTROL PROOF OF LINEAR FRANKS' LEMMA FOR GEODESIC FLOWS A. LAZRAG Abstract. We provide an elementary proof of the Franks lemma for geodesic flows that uses basic tools of geometric control theory. 1 such as geodesic flows (see [3] and [2]) and more generally Hamiltonians flows (see [15]). In this work, we focus

Boyer, Edmond

135

Energetic-Particle-Induced Geodesic Acoustic Mode Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA  

E-Print Network (OSTI)

Energetic-Particle-Induced Geodesic Acoustic Mode G. Y. Fu* Princeton Plasma Physics Laboratory-induced geodesic acoustic mode (EGAM) is shown to exist. The mode frequency and mode structure are determined comparable to that of geodesic acoustic mode (GAM) [4]. Here it is shown analytically and numerically

136

Intense Geodesic Acousticlike Modes Driven by Suprathermal Ions in a Tokamak Plasma R. Nazikian,1  

E-Print Network (OSTI)

Intense Geodesic Acousticlike Modes Driven by Suprathermal Ions in a Tokamak Plasma R. Nazikian,1 G for the energetic-particle-driven geodesic acoustic mode. DOI: 10.1103/PhysRevLett.101.185001 PACS numbers: 52.35.Bj of strong beam ion redistribution and/or loss. The mode fre- quency is $50% below the ideal geodesic

137

GEODESIC HAMSANDWICH CUTS # Prosenjit Bose + Erik D. Demaine # Ferran Hurtado John Iacono Stefan Langerman #  

E-Print Network (OSTI)

GEODESIC HAM­SANDWICH CUTS # Prosenjit Bose + Erik D. Demaine # Ferran Hurtado § John Iacono­sandwich geodesic is a shortest path in P between two points on the boundary of P that simultaneously bisects­sandwich geodesic. We also show that this algorithm is optimal in the algebraic computation tree model when

Morin, Pat

138

Multi-touchless: Real-Time Fingertip Detection and Tracking Using Geodesic Maxima  

E-Print Network (OSTI)

Multi-touchless: Real-Time Fingertip Detection and Tracking Using Geodesic Maxima Philip Krejov the geodesic maxima of the surface. Fingertips are then selected from these maxima using a simplified model that uses geodesic maxima instead of visual appearance which is both efficient to compute and robust to both

Bowden, Richard

139

A geometric framework for channel network extraction from lidar: Nonlinear diffusion and geodesic paths  

E-Print Network (OSTI)

A geometric framework for channel network extraction from lidar: Nonlinear diffusion and geodesic extraction. Following this preprocessing, channels are defined as curves of minimal effort, or geodesics and geodesic paths, J. Geophys. Res., 115, F01002, doi:10.1029/2009JF001254. 1. Introduction [2] The detection

Foufoula-Georgiou, Efi

140

A Survey of Geodesic Paths on 3D Surfaces$ Prosenjit Bosea  

E-Print Network (OSTI)

A Survey of Geodesic Paths on 3D Surfaces$ Prosenjit Bosea , Anil Maheshwaria , Chang Shub of theoretically and practically relevant algorithms to compute geodesic paths and distances on three on S is called a geodesic path on the surface and the shortest distance between two points on S is called

Wuhrer, Stefanie

Note: This page contains sample records for the topic "geodesic grid coupled" 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

GEODESIC COMPLETENESS FOR SOBOLEV Hs-METRICS ON THE DIFFEOMORPHISM GROUP OF THE CIRCLE  

E-Print Network (OSTI)

GEODESIC COMPLETENESS FOR SOBOLEV Hs-METRICS ON THE DIFFEOMORPHISM GROUP OF THE CIRCLE JOACHIM Sobolev norm Hs on the diffeomorphism group of the circle is geodesically complete, provided that s > 3 on the corre- sponding Lie algebra C(S1). The well-posedness of the geodesics flow for the right

Paris-Sud XI, Université de

142

SHORT GEODESIC SEGMENTS BETWEEN TWO POINTS ON A CLOSED RIEMANNIAN MANIFOLD  

E-Print Network (OSTI)

SHORT GEODESIC SEGMENTS BETWEEN TWO POINTS ON A CLOSED RIEMANNIAN MANIFOLD Alexander Nabutovsky there exist at least k distinct geodesics of length at most 20k!d between these points for every positive that for any pair of points on a closed Riemannian man- ifold Mn there exist infinitely many geodesics

Nabutovsky, Alexander

143

IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL. 10, NO. 10, OCTOBER 2001 1467 Fast Geodesic Active Contours  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL. 10, NO. 10, OCTOBER 2001 1467 Fast Geodesic Active stable numerical scheme to implement a fast version of the geodesic active contour model. The proposed method for tracking in color movies. Index Terms--Additive operator splitting, color, geodesic active

Rivlin, Ehud

144

A geodesic voting shape prior to constrain the level set evolution for the segmentation of tubular  

E-Print Network (OSTI)

A geodesic voting shape prior to constrain the level set evolution for the segmentation of tubular a geodesic voting method to segment tree struc- tures, such as retinal or cardiac blood vessels. Many authors have used minimal cost paths, or similarly geodesics relative to a weight potential P, to find a vessel

Cohen, Laurent

145

Kinetic Theories of Geodesic Acoustic Modes: Radial Structure, Linear Excitation by Energetic Particles and Nonlinear Saturation  

E-Print Network (OSTI)

Kinetic Theories of Geodesic Acoustic Modes: Radial Structure, Linear Excitation by Energetic, Vol.13, No.3, Jun 2011 Kinetic Theories of Geodesic Acoustic Modes: Radial Structure, Linear, Univ. of California, Irvine CA 92697-4575, USA Abstract Geodesic acoustic modes (GAMs) are oscillating

Zonca, Fulvio

146

Geodesic Active Regions Using Non-parametric Statistical Regional Description and Their  

E-Print Network (OSTI)

Geodesic Active Regions Using Non-parametric Statistical Regional Description and Their Application {mhg,afrangi}@unizar.es Abstract. The inclusion of statistical region-based information in the Geodesic for the segmentation of brain aneurysms in CTA data with the Geodesic Active Regions model. 1 Introduction Brain

Frangi, Alejandro

147

Geodesic diameter of sets defined by few quadratic equations and inequalities  

E-Print Network (OSTI)

Geodesic diameter of sets defined by few quadratic equations and inequalities Michel Coste and Seydou Moussa September 2, 2010 Abstract We prove a bound for the geodesic diameter of a subset borrowed from D'Acunto and Kurdyka (to deal with the geodesic diameter) and from Barvinok (to take

Paris-Sud XI, Université de

148

DISCRETE GEODESIC CALCULUS IN THE SPACE OF VISCOUS FLUIDIC MARTIN RUMPF AND BENEDIKT WIRTH  

E-Print Network (OSTI)

DISCRETE GEODESIC CALCULUS IN THE SPACE OF VISCOUS FLUIDIC OBJECTS MARTIN RUMPF AND BENEDIKT WIRTH cheap dissimilarity measure, a time discrete geodesic calculus is developed, and applications to shape in shape space. The notion of discrete geodesics defined as energy minimizing paths gives rise

Rumpf, Martin

149

SPHERES WITH POSITIVE CURVATURE AND NEARLY DENSE ORBITS FOR THE GEODESIC FLOW.  

E-Print Network (OSTI)

SPHERES WITH POSITIVE CURVATURE AND NEARLY DENSE ORBITS FOR THE GEODESIC, that is within " of the round metric and has a geodesic for whi* *ch the corresponding orbit of the geodesic flow is "-dense in the unit tangent bundle. Moreover* *, for any " > 0, we construct

Burns, Keith

150

Fast Geodesic Active Contours Roman Goldenberg, Ron Kimmel, Ehud Rivlin, Michael Rudzsky  

E-Print Network (OSTI)

1 Fast Geodesic Active Contours Roman Goldenberg, Ron Kimmel, Ehud Rivlin, Michael Rudzsky Abstract--- We use an unconditionally stable numerical scheme to implement a fast version of the geodesic active by a dynamic model known as the `geodesic active contour' introduced in [4], [5], [6], [7], see also [19], [30

Kimmel, Ron

151

From a closed piecewise geodesic to a constriction on a closed triangulated Franck Hetroy, Dominique Attali  

E-Print Network (OSTI)

From a closed piecewise geodesic to a constriction on a closed triangulated surface Franck H. In particular, con- strictions are periodic geodesics. We use constrictions in order to segment objects. In [4], we proposed an ap- proach based on progressive surface simplification and local geodesic computation

Paris-Sud XI, Université de

152

A GEODESIC VOTING METHOD FOR THE SEGMENTATION OF TUBULAR TREE AND CENTERLINES  

E-Print Network (OSTI)

A GEODESIC VOTING METHOD FOR THE SEGMENTATION OF TUBULAR TREE AND CENTERLINES Youssef Rouchdy1´el´ecom ParisTech, CNRS LTCI, 75013 Paris, France ABSTRACT This paper presents a geodesic voting method paths, or similarly geodesics relative to a weight potential P, to find a vessel between two end points

Cohen, Laurent

153

Kinetic theory of Geodesic Acoustic Modes: radial structures and nonlinear excitations  

E-Print Network (OSTI)

1 TH/P3-7 Kinetic theory of Geodesic Acoustic Modes: radial structures and nonlinear excitations F author: zonca@frascati.enea.it Abstract. Geodesic Acoustic Modes (GAM) are shown to constitute, we show that Geodesic Acoustic Modes (GAM) [1] constitute a continuous spec- trum due to radial

Zonca, Fulvio

154

Geodesic equivalence via integrability Peter Topalov y and Vladimir S. Matveev z  

E-Print Network (OSTI)

Geodesic equivalence via integrability Peter Topalov #3;y and Vladimir S. Matveev z Keywords: Geodesically Equivalent Metrics, Projectively Equivalent Metrics, Integrable Systems, Levi-Civita Coordinates an orbital di#11;eomorphism be- tween two Hamiltonian systems, produces integrals of them. We treat geodesic

Matveev, Vladimir S.

155

Static detectors and circular-geodesic detectors on the Schwarzschild black hole  

E-Print Network (OSTI)

We examine the response of an Unruh-DeWitt particle detector coupled to a massless scalar field on the (3+1)-dimensional Schwarzschild spacetime, in the Boulware, Hartle-Hawking and Unruh states, for static detectors and detectors on circular geodesics, by primarily numerical methods. For the static detector, the response in the Hartle-Hawking state exhibits the known thermality at the local Hawking temperature, and the response in the Unruh state is thermal at the local Hawking temperature in the limit of a large detector energy gap. For the circular-geodesic detector, we find evidence of thermality in the limit of a large energy gap for the Hartle-Hawking and Unruh states, at a temperature that exceeds the Doppler-shifted local Hawing temperature. Detailed quantitative comparisons between the three states are given. The response in the Hartle-Hawking state is compared with the response in the Minkowski vacuum and in the Minkowski thermal state for the corresponding Rindler, drifted Rindler, and circularly accelerated trajectories. The analysis takes place within first-order perturbation theory and relies in an essential way on stationarity.

Lee Hodgkinson; Jorma Louko; Adrian C. Ottewill

2014-05-05T23:59:59.000Z

156

Materials Research for Smart Grid Applications Steven J Bossart  

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and home energy management systems, smart appliances and devices capable of demand response, and other technologies. These assets coupled with a smarter grid can provide...

157

Quantized geodesic flow and superconductivity of plasma in fireballs  

E-Print Network (OSTI)

An explanation of stability of fireballs is proposed based on quantum effects in a thin surface layer of negatively charged plasma surrounding a positive kernel of a fireball. We construct a quantization of the geodesic flow on the sphere and study the quantum statistics of fermions confined to a spherical surface. Analogy with the BCS theory of superconductivity is explored; spectral gap is estimated.

M. Zelikin

2007-02-21T23:59:59.000Z

158

Non-geodesic Motion in General Relativity and Thermodynamics  

E-Print Network (OSTI)

In a previous article a relationship was established between the linearized metrics of General Relativity associated with geodesics and the Dirac Equation of quantum mechanics. In this paper the extension of that result to arbitrary curves is investigated. In the case of scalar fields, a relationship between mass and temperature is also worked out.

Paul O'Hara

2010-05-10T23:59:59.000Z

159

Scaling cosmologies, geodesic motion and pseudo-susy  

E-Print Network (OSTI)

One-parameter solutions in supergravity carried by scalars and a metric trace out curves on the scalar manifold. In ungauged supergravity these curves describe a geodesic motion. It is known that a geodesic motion sometimes occurs in the presence of a scalar potential and for time-dependent solutions this can happen for scaling cosmologies. This note contains a further study of such solutions in the context of pseudo-supersymmetry for multi-field systems whose first-order equations we derive using a Bogomol'nyi-like method. In particular we show that scaling solutions that are pseudo-BPS must describe geodesic curves. Furthermore, we clarify how to solve the geodesic equations of motion when the scalar manifold is a maximally non-compact coset such as occurs in maximal supergravity. This relies upon a parametrization of the coset in the Borel gauge. We then illustrate this with the cosmological solutions of higher-dimensional gravity compactified on a $n$-torus.

Wissam Chemissany; André ploegh; Thomas Van Riet

2007-08-17T23:59:59.000Z

160

Networks, smart grids: new model for synchronization  

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

Stories » Stories » Networks, smart grids: new model for synchronization Networks, smart grids: new model for synchronization Researchers developed a surprisingly simple mathematical model that accurately predicts synchronization as a function of the parameters and the topology of the underlying network. May 21, 2013 High voltage transmission lines carry electrical power. High voltage transmission lines carry electrical power. The researchers envision that their method could be applied to assess synchronization and robustness quickly in electrical grids under volatile operating conditions. Networks of individual oscillating nodes often spontaneously synchronize and begin to oscillate at a coherent frequency. From heart cells to flashing fireflies to electric power grids, coupled oscillator networks are

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Now Available: Smart Grid Investments Improve Grid Reliability...  

Energy Savers (EERE)

Smart Grid Investments Improve Grid Reliability, Resilience, and Storm Responses (November 2014) Now Available: Smart Grid Investments Improve Grid Reliability, Resilience, and...

162

Comments of National Grid to the Smart Grid RFI  

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

National Grid’s Response to the Department of Energy Smart Grid RFI: Addressing Policy and Logistical Challenges of Smart Grid Implementation

163

Excitation of kinetic geodesic acoustic modes by drift waves in nonuniform plasmas  

SciTech Connect

Effects of system nonuniformities and kinetic dispersiveness on the spontaneous excitation of Geodesic Acoustic Mode (GAM) by Drift Wave (DW) turbulence are investigated based on nonlinear gyrokinetic theory. The coupled nonlinear equations describing parametric decay of DW into GAM and DW lower sideband are derived and then solved both analytically and numerically to investigate the effects on the parametric decay process due to system nonuniformities, such as nonuniform diamagnetic frequency, finite radial envelope of DW pump, and kinetic dispersiveness. It is found that the parametric decay process is a convective instability for typical tokamak parameters when finite group velocities of DW and GAM associated with kinetic dispersiveness and finite radial envelope are taken into account. When, however, nonuniformity of diamagnetic frequency is taken into account, the parametric decay process becomes, time asymptotically, a quasi-exponentially growing absolute instability.

Qiu, Z. [Inst. Fusion Theory and Simulation, Zhejiang Univ., Hangzhou 310027 (China)] [Inst. Fusion Theory and Simulation, Zhejiang Univ., Hangzhou 310027 (China); Chen, L. [Inst. Fusion Theory and Simulation, Zhejiang Univ., Hangzhou 310027 (China) [Inst. Fusion Theory and Simulation, Zhejiang Univ., Hangzhou 310027 (China); Dept. Physics and Astronomy, Univ. of California, Irvine, California 92697-4575 (United States); Zonca, F. [Inst. Fusion Theory and Simulation, Zhejiang Univ., Hangzhou 310027 (China) [Inst. Fusion Theory and Simulation, Zhejiang Univ., Hangzhou 310027 (China); Associazione Euratom-ENEA sulla Fusione, C.P. 65 - I-00044 - Frascati (Italy)

2014-02-15T23:59:59.000Z

164

NERSC Grid Certificates  

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

Grid Grid Certificates Grid Certificates | Tags: Grid Grid certificates allow you to access NERSC (and other Grid enabled computing facilities) via grid interfaces. Grid certificates are credentials that must be initialized for use with grid tools. Once a certificate is initialized it is automatically used by the grid tools to authenticate the user to the grid resource. Getting a Short Lived NERSC CA Certificate The NERSC Online CA now offers a quick and painless way to obtain grid certificates. You can obtain a grid certificate with a single command using this method. If you are on a NERSC system, load the globus module to set up your environment: % module load globus or % module load osg On the client system (assuming you have the globus binaries in your path), simply run:

165

Economy of Smart Grid  

Science Journals Connector (OSTI)

Smart grid is generally characterized by high installation cost ... of the sources. In essence, renewable-based smart grid is bought today to reduce tomorrow’s electricity bill. The costs of smart grid include al...

Gang Liu; M. G. Rasul; M. T. O. Amanullah; M. M. K. Khan

2013-01-01T23:59:59.000Z

166

GridLAB-D  

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

GridLAB-D GridLAB-D 2010 Peer Review Overview * What is GridLAB-D? * Why use GridLAB-D? * How does GridLAB-D work? * How has GridLAB-D been used so far? * What is it expected in the coming year? * Funding and management details GridLAB-D Simulates the Smart Grid Power system models Load models Market models GridLAB-D model unifies keys elements of a Smart Grid  Next generation tool  Integrates models  Smart Grid analysis  Projects  Technologies  Cost/benefits  Business cases  Multi-scale models  Seconds to decades  Links to existing tools  Open source  Contributions from  Government  Industry  Academic  Vendors  Drives need for high performance computers  Vendors can add/extract modules for their own uses 3 Why simulate the smart grid?

167

Icosadeltahedral geometry of fullerenes, viruses and geodesic domes  

E-Print Network (OSTI)

I discuss the symmetry of fullerenes, viruses and geodesic domes within a unified framework of icosadeltahedral representation of these objects. The icosadeltahedral symmetry is explained in details by examination of all of these structures. Using Euler's theorem on polyhedra, it is shown how to calculate the number of vertices, edges, and faces in domes, and number of atoms, bonds and pentagonal and hexagonal rings in fullerenes. Caspar-Klug classification of viruses is elaborated as a specific case of icosadeltahedral geometry.

Antonio Siber

2007-11-22T23:59:59.000Z

168

The geodesic rule and the spectrum of the vacuum  

E-Print Network (OSTI)

We analyze the consequences of a recent argument justifying the validity of the "geodesic rule" which can be used to determine the density of global topological defects. We derive a formula that provides a rough estimate of the number of string-like defects formed in a phase transition. We apply this formula to vacua which are spheres. We provide some reasons for the deviation of our predictions from the corresponding accepted values.

Nikos Kalogeropoulos

2006-06-30T23:59:59.000Z

169

Distribution Grid Integration  

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

The DOE Systems Integration team funds distribution grid integration research and development (R&D) activities to address the technical issues that surround distribution grid planning,...

170

Security in Service?oriented Grid  

Science Journals Connector (OSTI)

Service?oriented architecture (SOA) is the most common used approach for building architectural decisions of a system. SOA is an architectural model for developing reliable distributed systems which functionality is provided as services. Features from this approach are services’ interoperability loose?coupling reusability and discoverability. Grid is a new technology for using computers network and devices. The Grid is infrastructure for coordinate use of distributed resources shared by different institutes computational centers and organizations. Grid is dynamic and heterogeneous system beyond any institutional or organization boundaries. Considering this the development and integration of Gird application in such dynamic and heterogeneous environment is a great challenge. Something more developing of Grid application is still tightly related with the underlying middleware and its security. Service?oriented Grids are one step further in integration of Grid application because of the SOA features. These benefits from Grid and SOA however will require and new security approaches for building application. In this article we will briefly describe some known security approaches in SOA and Grid and how they are applied in security models of two well known service?oriented grid architectures—OGSA and EGA.

R. Goranova

2008-01-01T23:59:59.000Z

171

NREL: Transmission Grid Integration - Grid Simulation  

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

Grid Simulation Grid Simulation NREL's controllable grid interface test system can reduce certification testing time and costs while providing system engineers with a better understanding of how wind turbines react to disturbances on the electric power system. To understand the behavior of wind turbines during grid disturbances, manufacturers and utility grid operators perform a series of tests and transient simulation studies. Utility operators need to estimate how much power wind turbines can provide to help regulate grid frequency. And after design modifications are made to control software, manufacturers may need to retest their turbines. But testing wind turbines in the field can be a lengthy and expensive process. NREL developed the controllable grid interface test system to reduce the

172

Running Grid Jobs at NERSC  

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

Running Grid Jobs Running Grid Jobs | Tags: Grid How to submit a grid job to NERSC The following NERSC resources support job submission via Grid interfaces. Remote job submission...

173

Aerosol Indirect Effect on the Grid-scale Clouds in the Two-way Coupled WRF-CMAQ: Model Description, Development, Evaluation and Regional Analysis  

SciTech Connect

This study implemented first, second and glaciations aerosol indirect effects (AIE) on resolved clouds in the two-way coupled WRF-CMAQ modeling system by including parameterizations for both cloud drop and ice number concentrations on the basis of CMAQpredicted aerosol distributions and WRF meteorological conditions. The performance of the newly-developed WRF-CMAQ model, with alternate CAM and RRTMG radiation schemes, was evaluated with the observations from the CERES satellite and surface monitoring networks (AQS, IMPROVE, CASTNet, STN, and PRISM) over the continental U.S. (CONUS) (12-km resolution) and eastern Texas (4-km resolution) during August and September of 2006. The results at the AQS surface sites show that in August, the NMB values for PM2.5 over the eastern/western U.S (EUS/WUS) and western U.S. (WUS) are 5.3% (?0.1%) and 0.4% (-5.2%) for WRF-CMAQ/CAM (WRF-CMAQ/RRTMG), respectively. The evaluation of PM2.5 chemical composition reveals that in August, WRF-CMAQ/CAM (WRF-CMAQ/RRTMG) consistently underestimated the observed SO4 2? by -23.0% (-27.7%), -12.5% (-18.9%) and -7.9% (-14.8%) over the EUS at the CASTNet, IMPROVE and STN sites, respectively. Both models (WRF-CMAQ/CAM, WRF-CMAQ/RRTMG) overestimated the observed mean OC, EC and TC concentrations over the EUS in August at the IMPROVE sites. Both models generally underestimated the cloud field (SWCF) over the CONUS in August due to the fact that the AIE on the subgrid convective clouds was not considered when the model simulations were run at the 12 km resolution. This is in agreement with the fact that both models captured SWCF and LWCF very well for the 4-km simulation over the eastern Texas when all clouds were resolved by the finer domain. Both models generally overestimated the observed precipitation by more than 40% mainly because of significant overestimation in the southern part of the CONUS in August. The simulations of WRF-CMAQ/CAM and WRF-CMAQ/RRTMG show dramatic improvements for SWCF, LWCF, COD, cloud fractions and precipitation over the ocean relative to those of WRF default cases in August. The model performance in September is similar to that in August except for greater overestimation of PM2.5 due to the overestimations of SO4 2-, NH4 +, NO3 -, and TC over the EUS, less underestimation of clouds (SWCF) over the land areas due to about 10% lower SWCF values and less convective clouds in September.

Yu, Shaocai; Mathur, Rohit; Pleim, Jonathan; Wong, David; Gilliam, R.; Alapaty, Kiran; Zhao, Chun; Liu, Xiaohong

2014-10-24T23:59:59.000Z

174

Networks, smart grids: new model for synchronization  

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

Networks, smart grids: new model for synchronization Networks, smart grids: new model for synchronization Networks, smart grids: new model for synchronization Researchers developed a surprisingly simple mathematical model that accurately predicts synchronization as a function of the parameters and the topology of the underlying network. May 21, 2013 High voltage transmission lines carry electrical power. High voltage transmission lines carry electrical power. The researchers envision that their method could be applied to assess synchronization and robustness quickly in electrical grids under volatile operating conditions. Networks of individual oscillating nodes often spontaneously synchronize and begin to oscillate at a coherent frequency. From heart cells to flashing fireflies to electric power grids, coupled oscillator networks are

175

Topological obstructions to a totally geodesic, Riemannian foliation  

E-Print Network (OSTI)

TOPOLOGICAL OBSTRUC, IONS TO A TOTAL' Y GEODFSIC, RIEMANNIAN FOLIATION A Thesis by YINCEI'JT ED'AARD COLL, OUNIOR Subm1tted to the Graduate College of Texas A8M University in partial fult1llment of the requirements for the degree of Ii...ASTER OF SCIENCE December 1983 Major Subject: Mathematics TOPOLOGICAL OBSTRUCTIONS TO A TOTALLY GEODESIC RIEMANNIAN FOLIATION A Thesis by VINCENT EDWARD COLL, JUNIOR Approved as to style and content by. D. L. Johnson (Chairman of Committee) D. K. Friesen...

Coll, Vincent Edward

1983-01-01T23:59:59.000Z

176

Landau Damping of Geodesic Acoustic Mode in Toroidally Rotating Tokamaks  

E-Print Network (OSTI)

Geodesic acoustic mode (GAM) is analyzed by using gyro-kinetic equations applicable to low-frequency microinstabilities in a rotating axisymmetric plasma. Dispersion relation of GAM in the presence of arbitrary Mach number is analytically dervied. Toroidal rotation plays the same effects on the GAM regardless of the orientation of equilibrium flow. It is shown that the toroidal Mach number increases the GAM frequency and dramatically decreases the Landau damping rate. Classical gyro-kinetic equation is examined to be not suitable for describing the GAM in a torodially rotating tokamak plasma even for very small Mach number.

Ren, Haijun

2015-01-01T23:59:59.000Z

177

Grid Interaction Tech Team, and International Smart Grid Collaboration...  

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

Team, and International Smart Grid Collaboration Grid Interaction Tech Team, and International Smart Grid Collaboration 2012 DOE Hydrogen and Fuel Cells Program and Vehicle...

178

Smart Grid Overview  

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

Smart Grid Overview Ben Kroposki, PhD, PE Director, Energy Systems IntegraLon NaLonal Renewable Energy Laboratory What is t he S mart Grid? and DER Source: NIST/EPRI Architecture Task Group The S mart Grid is the electricity producHon a nd delivery s ystem along with consumpHon integrated with communicaHons and informaHon technology The S mart Grid is an automated, widely distributed energy delivery network characterized by a two---way flow of electricity and informaHon, capable of monitoring a nd responding t o changes in everything f rom power plants to customer preferences t o individual appliances. 2 Grid ModernizaHon - Smart Grid Scope Transmission DistribuHon End---Use and DER 2010 Smart Grid System Report, February 2012 hNp://energy.gov/sites/prod/files/2010%20Smart%20Grid%20System%20Report.pdf 3 Smart Grid Vision

179

Geodesic stability for KS Black hole in Horava-Lifshitz gravity via Lyapunov exponents  

E-Print Network (OSTI)

By computing the Lyapunov exponent, which is the inverse of the instability time scale associated with this geodesic motion we show that there is two region of space which in both of them the equatorial timelike geodesics are stable via Lyapunov measure of stability.

M. R. Setare; D. Momeni

2010-09-17T23:59:59.000Z

180

Sandia National Laboratories: electric grid  

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

grid ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities, Grid Integration,...

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Interactive Grid | Department of Energy  

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

to promote better understanding of the operation of the power grid. Congressional Testimony Recovery Act Educational Resources Electricity 101 Interactive Grid Smart Grid Primer...

182

Sandia National Laboratories: Grid Integration  

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

Grid Integration Energy Supply Transformation Needed On February 20, 2013, in DETL, Distribution Grid Integration, Energy, Energy Assurance, Energy Surety, Grid Integration,...

183

Sandia National Laboratories: SMART Grid  

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

SMART Grid Mesa del Sol Project Is Finalist for International Smart Grid Action Network 2014 Award of Excellence On July 31, 2014, in Distribution Grid Integration, Energy, Energy...

184

Geodesic Bezier Curves: a Tool for Modeling on Triangulations Dimas Martinez Morera Paulo Cezar Carvalho Luiz Velho  

E-Print Network (OSTI)

Geodesic B´ezier Curves: a Tool for Modeling on Triangulations Dimas Mart´inez Morera Paulo Cezar is trimmed, final result. Abstract We define a new class of curves, called geodesic B´ezier curves care is taken to achieve interactive rates for modeling tasks. Keywords: Geodesic B´ezier Curve

185

ON GROUPS WHOSE GEODESIC GROWTH IS POLYNOMIAL MARTIN R. BRIDSON, JOSE BURILLO, MURRAY ELDER, AND ZORAN SUNIC  

E-Print Network (OSTI)

ON GROUPS WHOSE GEODESIC GROWTH IS POLYNOMIAL MARTIN R. BRIDSON, JOS´E BURILLO, MURRAY ELDER, AND ZORAN SUNI´C Abstract. This note records some observations concerning geodesic growth functions. If a nilpotent group is not virtually cyclic then it has exponential geodesic growth with respect to all finite

Burillo, José

186

Excitation of kinetic geodesic acoustic modes by drift waves in nonuniform plasmas Z. Qiu, L. Chen, and F. Zonca  

E-Print Network (OSTI)

Excitation of kinetic geodesic acoustic modes by drift waves in nonuniform plasmas Z. Qiu, L. Chen://scitation.aip.org/termsconditions. Downloaded to IP: 192.107.52.30 On: Thu, 06 Feb 2014 15:42:45 #12;Excitation of kinetic geodesic acoustic) Effects of system nonuniformities and kinetic dispersiveness on the spontaneous excitation of Geodesic

Zonca, Fulvio

187

arXiv:0707.4149v1[math.DG]27Jul2007 Test configurations and Geodesic rays  

E-Print Network (OSTI)

arXiv:0707.4149v1[math.DG]27Jul2007 Test configurations and Geodesic rays Xiuxiong Chen , Yudong Tang February 5, 2008 Contents 1 Introduction 2 2 Preliminary 5 2.1 Geodesic rays in K¨ahler potential Relative C1,1 geodesic ray from smooth test configuration 8 3.1 Existence

Chen, Xiuxiong

188

Geodesic acoustic mode excitation by a spatially broad energetic particle Z. Qiu, F. Zonca, and L. Chen  

E-Print Network (OSTI)

Geodesic acoustic mode excitation by a spatially broad energetic particle beam Z. Qiu, F. Zonca subject to AIP license or copyright; see http://pop.aip.org/about/rights_and_permissions #12;Geodesic-particle-induced geodesic acoustic mode are systematically studied, and their properties are found to depend

Zonca, Fulvio

189

Image-Set Matching using a Geodesic Distance and Cohort Normalization Yui Man Lui, J. Ross Beveridge, Bruce A. Draper  

E-Print Network (OSTI)

Image-Set Matching using a Geodesic Distance and Cohort Normalization Yui Man Lui, J. Ross are viewed as points on a Grassmann manifold, then geodesic distance on the manifold becomes the natural way-known image-set matching algorithm, Mutual Subspace Method (MSM), which does not use geodesic dis- tance

Draper, Bruce A.

190

GRID Security Review  

Science Journals Connector (OSTI)

A Computational GRID is a collection of heterogeneous computing resources ... computational power of current micro-processors, Computational GRIDs or meta-systems have gradually become more ... a secure environme...

Lazaros Gymnopoulos; Stelios Dritsas; Stefanos Gritzalis…

2003-01-01T23:59:59.000Z

191

Bench-Scale Cross Flow Filtration of  

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

... 7 3. Results of a Decade-long Control Simulation Using Geodesic Grid Coupled Climate Model at a Resolution 250 km, Including a...

192

Utility Grid EV charging  

E-Print Network (OSTI)

Main Utility Grid EV charging PCC Batteries DC Load EV charging Flywheel Interlinking converter PV or large distance interconnected grids, to energy efficient applications in distribution system, energy storage systems and local loads as a local grid, is gaining more interests due to its potential

Chaudhary, Sanjay

193

Building the TeraGrid  

Science Journals Connector (OSTI)

...improved service. (a) Security in a Grid environment Keeping computer...optical networking, Grid software compatibility, security and the performance of...users to manipulate their security credentials. Coordinated Grid middleware. The TeraGrid...

2005-01-01T23:59:59.000Z

194

Sandia National Laboratories: Grid Integration  

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

of renewable energy technology programs (Wind, Concentrating Solar Power, Geothermal, and Energy Systems Analysis). Transmission Grid Integration Distribution Grid Integration...

195

The Development of a Grid-based Engineering Design Problem  

E-Print Network (OSTI)

of Grid and Web Services concepts and technologies. The Globus Toolkit is a community-based, open should de- couple optimisation from analysis task execution in order to exploit Grid technologies to gain over network clusters. However, in order to fully exploit parallel computation over intranet or even

Sóbester, András

196

National Transmission Grid Study  

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

Grid Study Grid Study U.S. Department of Energy The Honorable Spencer Abraham Secretary of Energy May 2002 ii National Transmission Grid Study National Transmission Grid Study i ii National Transmission Grid Study National Transmission Grid Study iii How This Study Was Conducted The National Energy Policy Plan directed the U.S. Department of Energy (DOE) to conduct a study to examine the benefits of establishing a national electricity transmission grid and to identify transmission bottlenecks and measures to address them. DOE began by conducting an independent analysis of U.S. electricity markets and identifying transmission system bottlenecks using DOE's Policy Office Electricity Modeling System (POEMS). DOE's analysis, presented in Section 2, confirms the central role of the nation's transmission

197

From laboratory experiments to LISA Pathfinder: achieving LISA geodesic motion  

E-Print Network (OSTI)

This paper presents a quantitative assessment of the performance of the upcoming LISA Pathfinder geodesic explorer mission. The findings are based on the results of extensive ground testing and simulation campaigns using flight hardware and flight control and operations algorithms. The results show that, for the central experiment of measuring the stray differential acceleration between the LISA test masses, LISA Pathfinder will be able to verify the overall acceleration noise to within a factor two of the LISA requirement at 1 mHz and within a factor 6 at 0.1 mHz. We also discuss the key elements of the physical model of disturbances, coming from LISA Pathfinder and ground measurement, that will guarantee the LISA performance.

F Antonucci; M Armano; H Audley; G Auger; M Benedetti; P Binetruy; C Boatella; J Bogenstahl; D Bortoluzzi; P Bosetti; N Brandt; M Caleno; A Cavalleri; M Cesa; M Chmeissani; G Ciani; A Conchillo; G Congedo; I Cristofolini; M Cruise; K Danzmann; F De Marchi; M Diaz-Aguilo; I Diepholz; G Dixon; R Dolesi; N Dunbar; J Fauste; L Ferraioli; D Fertin; W Fichter; E Fitzsimons; M Freschi; A García Marin; C García Marirrodriga; R Gerndt; L Gesa; D Giardini; F Gibert; C Grimani; A Grynagier; B Guillaume; F Guzmán; I Harrison; G Heinzel; M Hewitson; D Hollington; J Hough; D Hoyland; M Hueller; J Huesler; O Jeannin; O Jennrich; P Jetzer; B Johlander; C Killow; X Llamas; I Lloro; A Lobo; R Maarschalkerweerd; S Madden; D Mance; I Mateos; P W McNamara; J Mendestì; E Mitchell; A Monsky; D Nicolini; D Nicolodi; M Nofrarias; F Pedersen; M Perreur-Lloyd; A Perreca; E Plagnol; P Prat; G D Racca; B Rais; J Ramos-Castro; J Reiche; J A Romera Perez; D Robertson; H Rozemeijer; J Sanjuan; A Schleicher; M Schulte; D Shaul; L Stagnaro; S Strandmoe; F Steier; T J Sumner; A Taylor; D Texier; C Trenkel; D Tombolato; S Vitale; G Wanner; H Ward; S Waschke; P Wass; W J Weber; P Zweifel

2010-12-29T23:59:59.000Z

198

Smart Grid | Department of Energy  

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

Smart Grid Smart Grid Smart Grid Overview Smart Grid refers to electrical grids that automatically gather and communicate information on usage, allowing for remote and automated control to improve efficiency and reliability of the grid. The goals of Smart Grid technology are to allow greater consumer control, reduce pollution, improve reliability, and reduce costs. For a more detailed overview of the Smart Grid, visit the Energy.gov sites below: Smart Grid 2010 Smart Grid Report You can also view a series of short videos to learn more: SmartGrid.gov NOVA - Smart Grid Technology Smart Grid technology employs existing communications and manufacturing technology to automate and integrate the electrical grid. Sensors and meters gather data that is communicated and analyzed, allowing advanced

199

Verification of the coupled fluid/solid transfer in a CASL grid-to-rod-fretting simulation : a technical brief on the analysis of convergence behavior and demonstration of software tools for verification.  

SciTech Connect

For a CASL grid-to-rod fretting problem, Sandia's Percept software was used in conjunction with the Sierra Mechanics suite to analyze the convergence behavior of the data transfer from a fluid simulation to a solid mechanics simulation. An analytic function, with properties relatively close to numerically computed fluid approximations, was chosen to represent the pressure solution in the fluid domain. The analytic pressure was interpolated on a sequence of grids on the fluid domain, and transferred onto a separate sequence of grids in the solid domain. The error in the resulting pressure in the solid domain was measured with respect to the analytic pressure. The error in pressure approached zero as both the fluid and solids meshes were refined. The convergence of the transfer algorithm was limited by whether the source grid resolution was the same or finer than the target grid resolution. In addition, using a feature coverage analysis, we found gaps in the solid mechanics code verification test suite directly relevant to the prototype CASL GTRF simulations.

Copps, Kevin D.

2011-12-01T23:59:59.000Z

200

Applying Grid Computing to the Parameter Sweep of a Group Difference Pseudopotential  

E-Print Network (OSTI)

Applying Grid Computing to the Parameter Sweep of a Group Difference Pseudopotential Wibke Sudholt1 computing grid can now provide the necessary resources. Here, we present a coupling of the GAMESS quantum chemical code to the Nimrod/G grid distribution tool, which is applied to the parameter scan of a group

Abramson, David

Note: This page contains sample records for the topic "geodesic grid coupled" 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.


201

Geodesic Flow and Two (Super) Component Analog of the Camassa-Holm Equation  

E-Print Network (OSTI)

We derive the 2-component Camassa-Holm equation and corresponding N=1 super generalization as geodesic flows with respect to the $H^1$ metric on the extended Bott-Virasoro and superconformal groups, respectively.

Partha Guha; Peter J. Olver

2006-05-23T23:59:59.000Z

202

Geodesic Completeness for Sobolev $H^{s}$-metrics on the Diffeomorphisms Group of the Circle  

E-Print Network (OSTI)

We prove that the weak Riemannian metric induced by the fractional Sobolev norm $H^s$ on the diffeomorphisms group of the circle is geodesically complete, provided $s>3/2$.

Joachim Escher; Boris Kolev

2014-05-24T23:59:59.000Z

203

On space-times admitting shear-free, irrotational, geodesic null congruences  

E-Print Network (OSTI)

Space-times admitting a shear-free, irrotational, geodesic null congruence are studied. Attention is focused on those space-times in which the gravitational field is a combination of a perfect fluid and null radiation.

A. M. Sintes; A. A. Coley; D. J. McManus

2000-05-16T23:59:59.000Z

204

DOE Grids Service Transition  

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

DOE Grids Service Transition DOE Grids Service Transition Services Overview ECS Audio/Video Conferencing Fasterdata IPv6 Network Network Performance Tools (perfSONAR) ESnet OID Registry PGP Key Service Virtual Circuits (OSCARS) DOE Grids Service Transition Contact Us Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net DOE Grids Service Transition Background ESnet has decided to transition support and management for the certificate services provided by the DOE Grids public key infrastructure (PKI) to the Open Sciences Grid (OSG). OSG and ESnet provide service to many of the same user communities, and have long been collaborators in the areas of identity

205

Cyber Security & Smart Grid  

E-Print Network (OSTI)

Cyber Security & Smart Grid Jonathan Shapiro Texas Institute The Clean Air Through Energy Efficiency (CATEE) Conference Cyber Security & Smart Grid ESL-KT-11-11-23 CATEE 2011, Dallas, Texas, Nov. 7 ? 9, 2011 Cyber Security and The Smart... and communication protocols. ESL-KT-11-11-23 CATEE 2011, Dallas, Texas, Nov. 7 ? 9, 2011 Smart Grid Systems ?Current Cyber Security Issues ? Advanced Metering Infrastructure (AMI) Security ? The wireless devices are used in the smart meters located...

Shapiro, J.

2011-01-01T23:59:59.000Z

206

Integration of geodesic flows on homogeneous spaces: the case of a wild lie group  

E-Print Network (OSTI)

We obtain necessary and sufficient conditions for the integrability in quadratures of geodesic flows on homogeneous spaces $M$ with invariant and central metrics. The proposed integration algorithm consists in using a special canonical transformation in the space $T^*M$ based on constructing the canonical coordinates on the orbits of the coadjoint representation and on the simplectic sheets of the Poisson algebra of invariant functions. This algorithm is applicable to integrating geodesic flows on homogeneous spaces of a wild Lie group.

A. A. Magazev; I. V. Shirokov

2007-03-21T23:59:59.000Z

207

Timelike Geodesic Currents in the Stationary, Axisymmetric, Force-free Magnetosphere of a Kerr Black Hole  

E-Print Network (OSTI)

The structural properties of geodesic currents in an ambient Kerr background is studied from an analytical point of view. The geodesics in the congruence correspond to charged particles that carry energy and angular momentum from the black hole through the Blandford-Znajek mechanism. It is shown that the resulting magnetosphere naturally satisfies the Znajek regularity condition. Particular attention is paid here to the energy extracted by matter currents rather than by electromagnetic Poynting fluxes.

Govind Menon; Charles Dermer

2008-11-12T23:59:59.000Z

208

Open Grid Forum  

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

Publications and Presentations Galleries ESnet Awards and Honors ESnet Live Blog Home Engineering Services OSCARS OSCARS Standard and Open Grid Forum Engineering Services...

209

Industrial and Grid Security  

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

Industrial and Grid Security Establishing resilient infrastructures that operate when sensors and physical assets are perturbed is an important national objective. Two related LDRD...

210

SMART GRID COMMUNICATIONS.  

E-Print Network (OSTI)

??Smart grid technologies are starting to be the future of electric power systems. These systems are giving the utilities detailed information about their systems in… (more)

Asbery, Christopher W

2012-01-01T23:59:59.000Z

211

Sandia National Laboratories: Grid  

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

technologies continues as transmission planners are required to study these technologies' impact on the grid. Sandia is continuing its efforts to fully develop, validate, and...

212

Smart Grid | OpenEI Community  

Open Energy Info (EERE)

out, brown out, bulk power system, electricity grid, future grid, grid history, security, Smart Grid, transmission Dc The Internet of Things Helping Utilities Posted by: Dc 16 Oct...

213

Smart Grid Primer (Smart Grid Books) | Department of Energy  

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

Educational Resources » Smart Grid Primer Educational Resources » Smart Grid Primer (Smart Grid Books) Smart Grid Primer (Smart Grid Books) Smart Grid Primer (Smart Grid Books) "The Smart Grid: An Introduction," prepared 2008, is a publication sponsored by DOE's Office of Electricity Delivery and Energy Reliability that explores - in layman's terms - the nature, challenges, opportunities and necessity of Smart Grid implementation. Additional books, released in 2009, target the interests of specific stakeholder groups: Consumer Advocates, Utilities, Technology Providers, Regulators, Policy Makers, and Environmental Groups, to explain in greater detail what the Smart Grid will mean to each. General Public The Smart Grid: An Introduction Consumer Advocates What the Smart Grid Means to Americans

214

Smart Grid Week: Working to Modernize the Nation's Electric Grid |  

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

Smart Grid Week: Working to Modernize the Nation's Electric Grid Smart Grid Week: Working to Modernize the Nation's Electric Grid Smart Grid Week: Working to Modernize the Nation's Electric Grid June 3, 2013 - 11:00am Addthis Introducing Smart Grid Week. | Photo courtesy of Pacific Northwest National Laboratory. Introducing Smart Grid Week. | Photo courtesy of Pacific Northwest National Laboratory. Erin R. Pierce Erin R. Pierce Digital Communications Specialist, Office of Public Affairs Learn More about the Smart Grid Visit smartgrid.gov for access to videos, maps and data on the effort to transform the nation's electric grid. Take a look at A Policy Framework For the 21st Century Grid: A Progress Report, from the White House Office of Science and Technology Policy. Our new Energy.gov series, Smart Grid Week, highlights efforts happening

215

Grid Simulator for Power Quality Assessment of Micro-Grids  

E-Print Network (OSTI)

1 Grid Simulator for Power Quality Assessment of Micro-Grids Joaqu´in Eloy-Garc´iaa , Juan C-to-back to a 380 V three-phase grid and feeding a micro-grid composed of two inverter interfaced distributed of the simulator. Finally, a case study is presented by testing a micro-grid. Index Terms Grid Simulator, Power

Vasquez, Juan Carlos

216

Security for grids  

SciTech Connect

Securing a Grid environment presents a distinctive set of challenges. This paper groups the activities that need to be secured into four categories: naming and authentication; secure communication; trust, policy, and authorization; and enforcement of access control. It examines the current state of the art in securing these processes and introduces new technologies that promise to meet the security requirements of Grids more completely.

Humphrey, Marty; Thompson, Mary R.; Jackson, Keith R.

2005-08-14T23:59:59.000Z

217

Transdisciplinary electric power grid science  

Science Journals Connector (OSTI)

Transdisciplinary electric power grid science 10.1073/pnas.1309151110...Connections among regions of a power grid spread risk, like in other infrastructures...Tradeoffs of Model Complexity Power grid modeling is not merely an academic...

Charles D. Brummitt; Paul D. H. Hines; Ian Dobson; Cristopher Moore; Raissa M. D'Souza

2013-01-01T23:59:59.000Z

218

Power Grid Growth and Evolution  

Science Journals Connector (OSTI)

This chapter models and analyzes in detail the slow dynamics in power grids. The driving forces for power grid evolutions are identified and then utilized to construct the general evolution model for complex power grids

Shengwei Mei; Xuemin Zhang; Ming Cao

2011-01-01T23:59:59.000Z

219

Transdisciplinary electric power grid science  

Science Journals Connector (OSTI)

...damage or build distributed generation?). The “smart grid,” which monitors and controls electrical infrastructure...challenge for transdisciplinary power grid science. New smart grid measurement devices provide orders of magnitude more data...

Charles D. Brummitt; Paul D. H. Hines; Ian Dobson; Cristopher Moore; Raissa M. D'Souza

2013-01-01T23:59:59.000Z

220

Smart Grid Data Integrity Attack  

E-Print Network (OSTI)

IEEE Transactions on Smart Grid, vol. 2, no. 2, June [21] O.Malicious Data Attacks on Smart Grid State Estimation:Framework and Roadmap for Smart Grid Interoperability Stan-

Poolla, Kameshwar

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Sandia National Laboratories: Grid Integration  

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

Specialists Conference On July 31, 2014, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities, Grid Integration, Infrastructure Security, News, News &...

222

Technical and Economic Assessment of Off-grid, Mini-grid and Grid  

Open Energy Info (EERE)

Technical and Economic Assessment of Off-grid, Mini-grid and Grid Technical and Economic Assessment of Off-grid, Mini-grid and Grid Electrification Technologies Jump to: navigation, search Tool Summary Name: Technical and Economic Assessment of Off-grid, Mini-grid and Grid Electrification Technologies Agency/Company /Organization: World Bank Sector: Energy Focus Area: Energy Efficiency Topics: Resource assessment, Technology characterizations Website: siteresources.worldbank.org/EXTENERGY/Resources/336805-1157034157861/E References: Technical and Economic Assessment of Off-grid, Mini-grid and Grid Electrification Technologies[1] Summary "This report is part of the Energy and Water Department's commitment to providing new techniques and knowledge which complement the direct investment and other assistance to electrification as provided by the

223

Grid-based Production  

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

Grid-based Production Grid-based Production Grid-based Production PDSF is a Tier 2 site for ALICE and as such has the infrastructure in place to run automated grid-based ALICE production jobs. The main components of this infrastructure are listed below. Grid-Enabled Storage Elements There are currently a set of 10 servers running XRootD with a total capacity of 720TB. Included in XRootD are the data transfer tools used to transfer the input and output files for the production jobs running at PDSF. In addition to the 10 servers there is also the XRootD redirector which is currently running on pc1801.nersc.gov (pdsf5.nersc.gov). VO Box A VO (Virtual Organization) box is a dedicated node (palicevo1.nersc.gov) that coordinates the production. It runs the grid-monitoring tool MonALISA, the AliEn grid framework software, a Condor-G client and does job

224

Access Grid | Argonne National Laboratory  

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

Access Grid Access Grid Access Grid The Access Grid is the ensemble of resources that can be used to support human interaction across the grid. It consists of multimedia display, presentation and interactive environments, interfaces to grid middleware, and interfaces to visualization environments. The Access Grid will support large-scale distributed meetings, collaborative work sessions, seminars, lectures, tutorials and training. The Access Grid design point is group-to-group communication (thus differentiating it from desktop to desktop based tools that focus on individual communication). The Access Grid environment must enable both formal and informal group interactions. Large-format displays integrated with intelligent or active meeting rooms are a central feature of the Access Grid nodes. Access Grid nodes are

225

Exploiting the Computational Grid Lecture 1 Globus and the Grid  

E-Print Network (OSTI)

software used. · · The Globus toolkit consists of four key components: · Security ­ handled by Grid Security Infrastructure (GSI) · Resource Management ­ Grid Resource Allocation Manager (GRAM) · Information Services ­ Grid Resource Information Protocol (GRIP) · Data Management ­ Grid FTP · Security is essential

226

grid history | OpenEI Community  

Open Energy Info (EERE)

the grid? black out brown out bulk power system electricity grid future grid grid history security Smart Grid transmission We all rely on it but what do you really know about our...

227

An Environment for Enabling Interactive Grids  

Science Journals Connector (OSTI)

Traditional use of grid computing allows a user to submit batch jobs in a grid environment. We believe, next generation grids will extend the application domain to include interactive graphical sessions. We term such grids interactive grids. In this ...

Vanish Talwar; Sujoy Basu; Raj Kumar

2003-06-01T23:59:59.000Z

228

GridWise Alliance  

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

Presentation—given at the Spring 2009 Federal Utility Partnership Working Group (FUPWG) meeting—discusses the GRIDWISE ALLIANCE including its mission, today and tomorrow's grid, membership, work groups, and key policy initiatives.

229

The gridded electromagnet probe  

E-Print Network (OSTI)

We attempted to measure the anisotropy in the electron distribution function in magnetized plasma by exploiting the adiabatic invariance of the electron's magnetic moment with a probe comprising a grid, a collector, and ...

Shadman, K. (Khashayar), 1972-

2003-01-01T23:59:59.000Z

230

Transmission Grid Integration  

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

The levels of solar energy penetration envisioned by the DOE SunShot Initiative must be interconnected effectively onto the transmission grid. This interconnection requires an in-depth...

231

GRIDS: Grid-Scale Rampable Intermittent Dispatchable Storage  

SciTech Connect

GRIDS Project: The 12 projects that comprise ARPA-E’s GRIDS Project, short for “Grid-Scale Rampable Intermittent Dispatchable Storage,” are developing storage technologies that can store renewable energy for use at any location on the grid at an investment cost less than $100 per kilowatt hour. Flexible, large-scale storage would create a stronger and more robust electric grid by enabling renewables to contribute to reliable power generation.

None

2010-09-01T23:59:59.000Z

232

Geodesic Deviation Equation in GR equivalent theory of $f(T)$ gravity  

E-Print Network (OSTI)

In this work, we show that it is possible to study the GR equivalent notion of geodesic deviation in $f(T)$ gravity, in spite of the fact that in teleparallel gravity there is no notion of geodesics, and the torsion is responsible for the appearance of gravitational interaction. In this regard, we obtain the GR equivalent of $f(T)$ gravity whose equations are in the modified gravity form such as $f(R)$ gravity. Then, we obtain the GDE within the context of this modified gravity. In this way, the obtained geodesic deviation equation will correspond to the $f(T)$ gravity. Eventually, we extend the calculations to obtain the modification of Matting relation.

Darabi, F; Atazadeh, K

2015-01-01T23:59:59.000Z

233

Geodesic Deviation Equation in GR equivalent theory of $f(T)$ gravity  

E-Print Network (OSTI)

In this work, we show that it is possible to study the GR equivalent notion of geodesic deviation in $f(T)$ gravity, in spite of the fact that in teleparallel gravity there is no notion of geodesics, and the torsion is responsible for the appearance of gravitational interaction. In this regard, we obtain the GR equivalent of $f(T)$ gravity whose equations are in the modified gravity form such as $f(R)$ gravity. Then, we obtain the GDE within the context of this modified gravity. In this way, the obtained geodesic deviation equation will correspond to the $f(T)$ gravity. Eventually, we extend the calculations to obtain the modification of Matting relation.

F. Darabi; M. Mousavi; K. Atazadeh

2014-12-31T23:59:59.000Z

234

Prepping Power Engineers for the Smart Grid | Department of Energy  

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

Prepping Power Engineers for the Smart Grid Prepping Power Engineers for the Smart Grid Prepping Power Engineers for the Smart Grid June 19, 2012 - 4:01pm Addthis This video examines electrostatic induction, a phenomenon that means a conductive object in the vicinity of a power line may have energy coupled to it even if it's not connected to the line. Check out the other videos created by the partnership Bonneville Power Administration, Washington State University and the Northwest Workforce Training Center for Electric Power Engineering on their Smart Grid YouTube playlist. Joel Scruggs Public Affairs Specialist, Bonneville Power Administration BPA's High Voltage Lab: Ever wonder why electricity makes power lines sag? This video explains why. Check out the Smart Grid Workforce playlist for other videos from

235

Grid Security and Integration with Minimal Performance Degradation  

E-Print Network (OSTI)

Computational grids are believed to be the ultimate framework to meet the growing computational needs of the scientific community. Here, the processing power of geographically distributed resources working under different ownerships, having their own access policy, cost structure and the likes, is logically coupled to make them perform as a unified resource. The continuous increase of availability of high-bandwidth communication as well as powerful computers built of low-cost components further enhance chances of computational grids becoming a reality. However, the question of grid security remains one of the important open research issues. Here, we present some novel ideas about how to implement grid security, without appreciable performance degradation in grids. A suitable alternative to the computationally expensive encryption is suggested, which uses a key for message authentication. Methods of secure transfer and exchange of the required key(s) are also discussed.

Sanyal, Sugata; Abraham, Ajith; Paprzycki, Marcin

2011-01-01T23:59:59.000Z

236

Smart Grid Integration Laboratory  

SciTech Connect

The initial federal funding for the Colorado State University Smart Grid Integration Laboratory is through a Congressionally Directed Project (CDP), DE-OE0000070 Smart Grid Integration Laboratory. The original program requested in three one-year increments for staff acquisition, curriculum development, and instrumentation â?? all which will benefit the Laboratory. This report focuses on the initial phase of staff acquisition which was directed and administered by DOE NETL/ West Virginia under Project Officer Tom George. Using this CDP funding, we have developed the leadership and intellectual capacity for the SGIC. This was accomplished by investing (hiring) a core team of Smart Grid Systems engineering faculty focused on education, research, and innovation of a secure and smart grid infrastructure. The Smart Grid Integration Laboratory will be housed with the separately funded Integrid Laboratory as part of CSUâ??s overall Smart Grid Integration Center (SGIC). The period of performance of this grant was 10/1/2009 to 9/30/2011 which included one no cost extension due to time delays in faculty hiring. The Smart Grid Integration Laboratoryâ??s focus is to build foundations to help graduate and undergraduates acquire systems engineering knowledge; conduct innovative research; and team externally with grid smart organizations. Using the results of the separately funded Smart Grid Workforce Education Workshop (May 2009) sponsored by the City of Fort Collins, Northern Colorado Clean Energy Cluster, Colorado State University Continuing Education, Spirae, and Siemens has been used to guide the hiring of faculty, program curriculum and education plan. This project develops faculty leaders with the intellectual capacity to inspire its students to become leaders that substantially contribute to the development and maintenance of Smart Grid infrastructure through topics such as: (1) Distributed energy systems modeling and control; (2) Energy and power conversion; (3) Simulation of electrical power distribution system that integrates significant quantities of renewable and distributed energy resources; (4) System dynamic modeling that considers end-user behavior, economics, security and regulatory frameworks; (5) Best practices for energy management IT control solutions for effective distributed energy integration (including security with the underlying physical power systems); (6) Experimental verification of effects of various arrangements of renewable generation, distributed generation and user load types along with conventional generation and transmission. Understanding the core technologies for enabling them to be used in an integrated fashion within a distribution network remains is a benefit to the future energy paradigm and future and present energy engineers.

Wade Troxell

2011-09-30T23:59:59.000Z

237

Future geodesic completeness of some spatially homogeneous solutions of the vacuum Einstein equations in higher dimensions  

E-Print Network (OSTI)

It is known that all spatially homogeneous solutions of the vacuum Einstein equations in four dimensions which exist for an infinite proper time towards the future are future geodesically complete. This paper investigates whether the analogous statement holds in higher dimensions. A positive answer to this question is obtained for a large class of models which can be studied with the help of Kaluza-Klein reduction to solutions of the Einstein-scalar field equations in four dimensions. The proof of this result makes use of a criterion for geodesic completeness which is applicable to more general spatially homogeneous models.

Arne Goedeke; Alan D. Rendall

2010-02-21T23:59:59.000Z

238

Recovery Act Smart Grid Projects | Department of Energy  

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

Recovery Act Smart Grid Projects Recovery Act Smart Grid Projects Recovery Act Smart Grid Projects...

239

3+1 geodesic equation and images in numerical spacetimes This article has been downloaded from IOPscience. Please scroll down to see the full text article.  

E-Print Network (OSTI)

3+1 geodesic equation and images in numerical spacetimes This article has been downloaded from.1088/0264-9381/29/24/245005 3+1 geodesic equation and images in numerical spacetimes F H Vincent1,2 , E Gourgoulhon2 and J Novak Online at stacks.iop.org/CQG/29/245005 Abstract The equations governing null and timelike geodesics

Gourgoulhon, Eric

240

arXiv:0908.1824v2[physics.comp-ph]24Feb2010 The calculation of longitude and latitude from geodesic measurements  

E-Print Network (OSTI)

arXiv:0908.1824v2[physics.comp-ph]24Feb2010 The calculation of longitude and latitude from geodesic, 2009; revised: February 24, 2010) 1. INTRODUCTION Consider a geodesic line between two points A and B by deriving the fundamental properties of geodesic lines on a spheroid of revolution. Even though aspects

Karney, Charles

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Geodesic Based Ink Separation for Spectral Printing Behnam Bastani*, Brian Funt**, *Hewlett-Packard Company, San Diego, CA, USA **Simon Fraser University, Vancouver, BC, Canada  

E-Print Network (OSTI)

Geodesic Based Ink Separation for Spectral Printing Behnam Bastani*, Brian Funt**, *Hewlett an interpolation between printer gamut points neighboring a projected point point's geodesic location interpolation in geodesic locations to find the best ink combination to match a spectral reflectance. Mc

Funt, Brian

242

Model checking grid security  

Science Journals Connector (OSTI)

Grid computing is one of the leading forms of high performance computing. Security in the grid environment is a challenging issue that can be characterized as a complex system involving many subtleties that may lead designers into error. This is similar to what happens with security protocols where automatic verification techniques (specially model checking) have been proved to be very useful at design time. This paper proposes a formal verification methodology based on model checking that can be applied to host security verification for grid systems. The proposed methodology must take into account that a grid system can be described as a parameterized model, and security requirements can be described as hyperproperties. Unfortunately, both parameterized model checking and hyperproperty verification are, in general, undecidable. However, it has been proved that this problem becomes decidable when jobs have some regularities in their organization. Therefore, this paper presents a verification methodology that reduces a given grid system model to a model to which it is possible to apply a “cutoff” theorem (i.e., a requirement is satisfied by a system with an arbitrary number of jobs if and only if it is satisfied by a system with a finite number of jobs up to a cutoff size). This methodology is supported by a set of theorems, whose proofs are presented in this paper. The methodology is explained by means of a case study: the Condor system.

F. Pagliarecci; L. Spalazzi; F. Spegni

2013-01-01T23:59:59.000Z

243

grid | OpenEI  

Open Energy Info (EERE)

1 1 Varnish cache server Browse Upload data GDR 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142278981 Varnish cache server grid Dataset Summary Description Global PV grid parity and market potential. Data is courtesy of Sean Ong. Source National Renewable Energy Laboratory Date Released Unknown Date Updated Unknown Keywords grid Parity Payback photovoltaic price PV Residential Data text/csv icon globalgridparity.csv (csv, 4.8 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period License License Creative Commons CCZero Comment Rate this dataset Usefulness of the metadata Average vote Your vote Usefulness of the dataset Average vote Your vote Ease of access Average vote Your vote

244

Essential Grid Workflow Monitoring Elements  

SciTech Connect

Troubleshooting Grid workflows is difficult. A typicalworkflow involves a large number of components networks, middleware,hosts, etc. that can fail. Even when monitoring data from all thesecomponents is accessible, it is hard to tell whether failures andanomalies in these components are related toa given workflow. For theGrid to be truly usable, much of this uncertainty must be elim- inated.We propose two new Grid monitoring elements, Grid workflow identifiersand consistent component lifecycle events, that will make Gridtroubleshooting easier, and thus make Grids more usable, by simplifyingthe correlation of Grid monitoring data with a particular Gridworkflow.

Gunter, Daniel K.; Jackson, Keith R.; Konerding, David E.; Lee,Jason R.; Tierney, Brian L.

2005-07-01T23:59:59.000Z

245

smart grid technologies | OpenEI Community  

Open Energy Info (EERE)

Smart Grid Description: Information about and discussion of smart grid technologies, tools, and techniques. The Smart Grid Investment Grant (SGIG) program is authorized by the...

246

,"Year",,"Summer",,,"Eastern Power Grid",,,,,,,,,,,,,,,,,,,,...  

U.S. Energy Information Administration (EIA) Indexed Site

Region, 1990 through 2004 " ,"(Megawatts and Percent)" ,"Year",,"Summer",,,"Eastern Power Grid",,,"Texas Power Grid",,,"Western Power Grid" ,,,"Contiguous...

247

Enhancing Grid Security Using Trusted Virtualization  

Science Journals Connector (OSTI)

Grid applications increasingly have sophisticated functional and security requirements. Current techniques mostly protect the grid resource provider from attacks by the grid user, while leaving the user comparati...

Hans Löhr; HariGovind V. Ramasamy; Ahmad-Reza Sadeghi…

2007-01-01T23:59:59.000Z

248

Sandia National Laboratories: smart grid integration  

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

smart grid integration Mesa del Sol Project Is Finalist for International Smart Grid Action Network 2014 Award of Excellence On July 31, 2014, in Distribution Grid Integration,...

249

Sandia National Laboratories: International Smart Grid Action...  

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

Smart Grid Action Network Mesa del Sol Project Is Finalist for International Smart Grid Action Network 2014 Award of Excellence On July 31, 2014, in Distribution Grid Integration,...

250

Workplace Charging Challenge Partner: National Grid | Department...  

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

Grid Workplace Charging Challenge Partner: National Grid As a leading international electricity and gas company, National Grid is committed to creating new, sustainable energy...

251

GROWDERS Demonstration of Grid Connected Electricity Systems...  

Open Energy Info (EERE)

GROWDERS Demonstration of Grid Connected Electricity Systems (Smart Grid Project) (Spain) Jump to: navigation, search Project Name GROWDERS Demonstration of Grid Connected...

252

SmartGrid Information | Department of Energy  

Office of Environmental Management (EM)

SmartGrid Information SmartGrid Information Smart Grid Information This web page provides information and resources on several policy issues critical to the continued development...

253

Mini-Grids: Effective Test-Beds for GRID Application  

Science Journals Connector (OSTI)

We describe a computing environment that we call a “mini- GRID”. This represents a hetereogeneous group of ... on a temporary basis as required. The mini-GRID displays the hetero- geneity and some of the complexi...

John Brooke; Martyn Foster; Stephen Pickles; Keith Taylor…

2000-01-01T23:59:59.000Z

254

O`ahu Grid Study: Validation of Grid Models  

E-Print Network (OSTI)

O`ahu Grid Study: Validation of Grid Models Prepared for the U.S. Department of Energy Office Resource Technologies for Energy Security Subtask 7.2 Deliverable By GE Global Research Niskayuna, New York

255

Singularity of projections of 2-dimensional measures invariant under the geodesic flow  

E-Print Network (OSTI)

We show that on any compact Riemann surface with variable negative curvature there exists a measure which is invariant and ergodic under the geodesic flow and whose projection to the base manifold is 2-dimensional and singular with respect to the 2-dimensional Lebesgue measure.

Risto Hovila; Esa Järvenpää; Maarit Järvenpää; François Ledrappier

2011-04-14T23:59:59.000Z

256

Numerical Algorithms (2005) 39: 155173 Springer 2005 Segmentation under geometrical conditions using geodesic  

E-Print Network (OSTI)

using geodesic active contours and interpolation using level set methods Christian Gout a , Carole Le, BP 08, 76 131 Mont-Saint-Aignan Cedex, France E-mail: chris_gout@cal.berkeley.edu, carole for the discretization. It is an intrinsic representation. The process exposed consists first in #12;156 C. Gout et al

Vese, Luminita A.

257

Minimal Lines and Geodesics within Matter: a Fundamental Difficulty of Einstein's Theory  

Science Journals Connector (OSTI)

... To illustrate my point, let us consider the case of Schwarzschild's incompressible liquid sphere in equilibrium, that is, T\\ = T\\ = T ... in vacuo, but not within a material medium. This may again be illustrated by Schwarzschild's solution, ds, for a liquid sphere as medium. The corresponding geodesic equations ...

LUDWIK SILBERSTEIN

1936-12-12T23:59:59.000Z

258

SHORTCUT METHOD OF SOLUTION OF GEODESIC EQUATIONS FOR SCHWARZSCHILD BLACK HOLE  

E-Print Network (OSTI)

It is shown how the use of the Kerr-Schild coordinate system can greatly simplify the formulation of the geodesic equation of the Schwarzschild solution. An application of this formulation to the numerical computation of the aspect of a non-rotating black hole is presented. The generalization to the case of the Kerr solution is presented too.

J. A. Marck

1995-05-10T23:59:59.000Z

259

Principal Characteristics of a Modern Grid  

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

FERC - NARUC Smart Grid Collaborative Meeting FERC - NARUC Smart Grid Collaborative Meeting Joe Miller - Modern Grid Strategy Team July 23, 2008 Conducted by the National Energy Technology Laboratory Funded by the U.S. Department of Energy Office of Electricity Delivery and Energy Reliability 2 Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y 2 Today's topics Smart Grid Background What is the Smart Grid? Some closing thoughts Questions 3 MODERN GRID S T R A T E G Y Smart Grid Background 4 Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y Many are working on the Smart Grid FERC DOE-OE Grid 2030 GridWise Alliance EEI NERC (FM) DOE/NETL Modern Grid Strategy GridWise Program GridWorks NW GridWise Testbed GridApps CERTS DOE-OE CEC PIER NYSERDA

260

Core Grid Functions: A Minimal Architecture for Grids  

E-Print Network (OSTI)

, etc.) Identity Credential Management Grid Security Infrastructure Globus 2-style interface · Service Security Gateways information servers · J2EE hosting environment servers · Factory services Grid Security · Architectural Constraints (e.g. security) · Bindings #12;8 Resource Discovery & State / Grid Persistent State

Note: This page contains sample records for the topic "geodesic grid coupled" 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

GRIP Grids with Intelligent Periphery: Control Architectures for Grid2050  

E-Print Network (OSTI)

challenge to the integration of these sources into the electric grid operations. The principal purposeGRIP ­ Grids with Intelligent Periphery: Control Architectures for Grid2050 D. Bakken, A. Bose, K@eecs.berkeley.edu Abstract--A distributed control and coordination archi- tecture for integrating inherently variable

Low, Steven H.

262

Scientific Grid computing  

Science Journals Connector (OSTI)

...analogy with other utilities in a modern society, such as electricity power Grids. The vision is that of computing power on demand...at a computer (or even a personal digital assistant with wireless Internet access) to view web pages as if they were on their...

2005-01-01T23:59:59.000Z

263

Smart Grid | Department of Energy  

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

Energy Usage Smart Grid Smart Grid October 21, 2014 Line workers get hands-on experience with an electrical pole as part of their training. | Photo courtesy of David Weaver....

264

Department of Energy - Smart Grid  

Energy Savers (EERE)

445 en Photo of the Week: Grid Friendly http:energy.govarticlesphoto-week-grid-friendly

265

Security Scheme in Wireless Grid  

Science Journals Connector (OSTI)

In this paper, we considered the two security services of authorization and data security in wireless Grid. The security issues is related to authorization and security, specific to Grid, the characteristics of t...

Yue Hong Zhang; Li Hao; Zhong Shan Yang

2011-01-01T23:59:59.000Z

266

Standards for the Smart Grid  

SciTech Connect

To get from today's electricity grid to tomorrow's smart grid with interconnection and full two way communications connection to distributed energy sources such as wind, solar, and plug-in electric vehicles requires an interoperability framework of protocols and standards.

DeBlasio, R.; Tom, C.

2008-01-01T23:59:59.000Z

267

Wireless Communications in Smart Grid  

Science Journals Connector (OSTI)

Communication networks play a crucial role in smart grid, as the intelligence of this complex system ... essential part of the scalable communication infrastructure for smart grid. In particular, wireless network...

Zoran Bojkovic; Bojan Bakmaz

2014-01-01T23:59:59.000Z

268

Grid Architecture William E. Johnston  

E-Print Network (OSTI)

·numerical grid generators ·etc. Apache Tomcat&WebSphere &Cold Fusion=JVM + servlet instantiation + routing

269

NREL: Distributed Grid Integration - Solar Distributed Grid Integration  

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

Solar Distributed Grid Integration Projects Solar Distributed Grid Integration Projects NREL provides grid integration support, system-level testing, and systems analysis for DOE's Solar Distributed Grid Integration Projects supported by the SunShot Initiative. These projects address technical issues and develop solutions for high penetration grid integration of solar technologies into the electric power system to meet the following goals: Reduce cost: reduce interconnection costs by developing streamlined procedures including advanced integration models for utility interconnection of photovoltaics (PV) Reduce market barriers: work with utilities and system integrators to reduce market barriers by providing research on impacts of integration of high penetration of PV systems and developing solutions.

270

Sandia National Laboratories: Transmission Grid Integration  

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

Infrastructure Security, Modeling, Modeling & Analysis, News, News & Events, Renewable Energy, SMART Grid, Systems Analysis, Transmission Grid Integration, Wind Energy Sandia...

271

NREL: Distributed Grid Integration - Projects  

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

Projects Projects Photo of two NREL engineers sitting in front of two computer monitors, discussing a project. NREL engineers work on data capture for micro-grid synchronization waveforms. Photo by Dennis Schroeder, NREL. NREL's distributed energy projects support the integration of new technologies into the electric power grid. This work involves industry, academia, other national laboratories, and various standards organizations. Learn more about our projects: Codes and standards Data collection and visualization Hawaii Clean Energy Initiative Microgrids Power systems modeling Solar Distributed Grid Integration (SunShot) Technology development Vehicle-to-Grid (V2G) Wind2Battery Printable Version Distributed Grid Integration Home Capabilities Projects Codes & Standards

272

Power Grid Proposal Motivation  

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

TCIP: Trustworthy Cyber TCIP: Trustworthy Cyber Infrastructure for the Power Grid William H. Sanders University of Illinois at Urbana-Champaign TCIP team proprietary. Do not distribute without written permission. DOE Office of Electricity Delivery & Energy Reliability Visualization and Controls Program Peer Review, October 2006 2 Scale of effort * $1.5 M per year for 5 years (Total FY06 DOE funding: 125K) * NSF/CISE, NSF/ENG, DOE, DHS * 4 universities, 19 senior investigators - University of Illinois at Urbana-Champaign (14) - Washington State University (3) - Cornell University (1) - Dartmouth University (1) * 19 member external advisory board (growing from 14) 3 TCIP Vision and Strategy * Provide the fundamental science and technology to create an intelligent, adaptive power grid which -

273

ColumbiaGrid Forum  

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

2012 National Electric 2012 National Electric Transmission Congestion Study Workshop Marv Landauer December 13, 2011 2 Northwest Congestion 2006 DOE Congestion Study identified: * "Seattle to Portland" as a Congestion area of Concern * Montana-Wyoming as a Conditional Congestion Area due to potential for coal and wind resource development * Projects are being pursued to relieve Seattle to Portland congestion (Castle Rock-Troutdale line) and Montana-NW congestion (Colstrip Upgrades) 3 Northwest Congestion 2011 WECC Ten Year Regional Transmission Plan identified congestion on: * Montana to NW Path * Pacific Ties (COI and PDCI) Studies included Castle Rock-Troutdale project and potential wind development in Montana and Northwest 4 ColumbiaGrid Perspective * ColumbiaGrid members energized $400

274

Smart Grid | Argonne National Laboratory  

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

Smart Grid Smart Grid Argonne researchers are working to create new, more powerful technology for long-distance transmission of renewable electricity, to balance rural supply and urban demand, and to integrate wind- and solar-generated electricity into the grid. Argonne is moving the smart grid from concept to reality, ensuring that this technology will interact seamlessly with new plug-in and electric cars. The smart grid is a key element in the national plan to lower energy costs for consumers, achieve energy independence and reduce greenhouse gases. The smart grid - an updated, futuristic electric power grid - will employ real-time, two-way communication technologies that allow consumers to connect directly with power suppliers. Customers will be able to choose

275

Smart Grid | Open Energy Information  

Open Energy Info (EERE)

Smart Grid Smart Grid (Redirected from Smart Grid) Jump to: navigation, search US Recovery Act Smart Grid Projects * US Recovery Act Smart Grid Investment Grant Projects (98) The Smart Grid Investment Grant (SGIG) program is authorized by the Energy Independence and Security Act of 2007, Section 1306, as amended by the Recovery Act. The purpose of the grant program is to accelerate the modernization of the nation's electric transmission and distribution systems and promote investments in smart grid technologies, tools, and techniques that increase flexibility, functionality, interoperability, cyber security, situational awareness, and operational efficiency. Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":500,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026

276

Constructing the ASCI computational grid  

SciTech Connect

The Accelerated Strategic Computing Initiative (ASCI) computational grid is being constructed to interconnect the high performance computing resources of the nuclear weapons complex. The grid will simplify access to the diverse computing, storage, network, and visualization resources, and will enable the coordinated use of shared resources regardless of location. To match existing hardware platforms, required security services, and current simulation practices, the Globus MetaComputing Toolkit was selected to provide core grid services. The ASCI grid extends Globus functionality by operating as an independent grid, incorporating Kerberos-based security, interfacing to Sandia's Cplant{trademark},and extending job monitoring services. To fully meet ASCI's needs, the architecture layers distributed work management and criteria-driven resource selection services on top of Globus. These services simplify the grid interface by allowing users to simply request ''run code X anywhere''. This paper describes the initial design and prototype of the ASCI grid.

BEIRIGER,JUDY I.; BIVENS,HUGH P.; HUMPHREYS,STEVEN L.; JOHNSON,WILBUR R.; RHEA,RONALD E.

2000-06-01T23:59:59.000Z

277

The Global Grid  

Science Journals Connector (OSTI)

This paper puts forward the vision that a natural future stage of the electricity network could be a grid spanning the whole planet and connecting most of the large power plants in the world: this is the “Global Grid”. The main driving force behind the Global Grid will be the harvesting of remote renewable sources, and its key infrastructure element will be the high capacity long transmission lines. Wind farms and solar power plants will supply load centers with green power over long distances. This paper focuses on the introduction of the concept, showing that a globally interconnected network can be technologically feasible and economically competitive. We further highlight the multiple opportunities emerging from a global electricity network such as smoothing the renewable energy supply and electricity demand, reducing the need for bulk storage, and reducing the volatility of the energy prices. We also discuss possible investment mechanisms and operating schemes. Among others, we envision in such a system a global power market and the establishment of two new coordinating bodies, the “Global Regulator” and the “Global System Operator”.

Spyros Chatzivasileiadis; Damien Ernst; Göran Andersson

2013-01-01T23:59:59.000Z

278

Data Management in the GridRPC GridRPC Data Management API  

E-Print Network (OSTI)

Data Management in the GridRPC Issues Conclusion GridRPC Data Management API Implementations, Le Mahec, Nakada GridRPC DM API: Implem. and Interop. Issues (1/13) #12;Data Management in the GridRPC Issues Conclusion Goal GridRPC DM types: Reminder 1 Data Management in the GridRPC Goal GridRPC DM types

Caniou, Yves

279

SunShot Initiative: Distribution Grid Integration  

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

Distribution Grid Integration to Distribution Grid Integration to someone by E-mail Share SunShot Initiative: Distribution Grid Integration on Facebook Tweet about SunShot Initiative: Distribution Grid Integration on Twitter Bookmark SunShot Initiative: Distribution Grid Integration on Google Bookmark SunShot Initiative: Distribution Grid Integration on Delicious Rank SunShot Initiative: Distribution Grid Integration on Digg Find More places to share SunShot Initiative: Distribution Grid Integration on AddThis.com... Concentrating Solar Power Photovoltaics Systems Integration Research, Development, & Demonstration Distribution Grid Integration Transmission Grid Integration Solar Resource Assessment Technology Validation Power Electronics & Balance of System Hardware Technologies Competitive Awards

280

SunShot Initiative: Transmission Grid Integration  

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

Transmission Grid Integration to Transmission Grid Integration to someone by E-mail Share SunShot Initiative: Transmission Grid Integration on Facebook Tweet about SunShot Initiative: Transmission Grid Integration on Twitter Bookmark SunShot Initiative: Transmission Grid Integration on Google Bookmark SunShot Initiative: Transmission Grid Integration on Delicious Rank SunShot Initiative: Transmission Grid Integration on Digg Find More places to share SunShot Initiative: Transmission Grid Integration on AddThis.com... Concentrating Solar Power Photovoltaics Systems Integration Research, Development, & Demonstration Distribution Grid Integration Transmission Grid Integration Solar Resource Assessment Technology Validation Power Electronics & Balance of System Hardware Technologies Competitive Awards

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Shearing and geodesic axially symmetric perfect fluids that do not produce gravitational radiation  

E-Print Network (OSTI)

Using a framework based on the 1+3 formalism we carry out a study on axially and reflection symmetric perfect and geodesic fluids, looking for possible models of sources radiating gravitational waves. Therefore, the fluid should be necessarily shearing, for otherwise the magnetic part of the Weyl tensor vanishes, leading to a vanishing of the super-Poynting vector. However, for the family of perfect, geodesic fluids considered here, it appears that all possible cases reduce to conformally flat, shear--free, vorticity-free, fluids, i.e Friedmann-Roberston-Walker. The super-Poynting vector vanishes and therefore no gravitational radiation is expected to be produced. The physical meaning of the obtained result is discussed.

Herrera, L; Ospino, J; Carot, J

2015-01-01T23:59:59.000Z

282

Geodesic deviations: modeling extreme mass-ratio systems and their gravitational waves  

E-Print Network (OSTI)

The method of geodesic deviations has been applied to derive accurate analytic approximations to geodesics in Schwarzschild space-time. The results are used to construct analytic expressions for the source terms in the Regge-Wheeler and Zerilli-Moncrief equations, which describe the propagation of gravitational waves emitted by a compact massive object moving in the Schwarzschild background space-time. The wave equations are solved numerically to provide the asymptotic form of the wave at large distances for a series of non-circular bound orbits with periastron distances up to the ISCO radius, and the power emitted in gravitational waves by the extreme-mass ratio binary system is computed. The results compare well with those of purely numerical approaches.

G. Koekoek; J. W. van Holten

2011-03-29T23:59:59.000Z

283

Vacuum non-expanding horizons and shear-free null geodesic congruences  

E-Print Network (OSTI)

We investigate the geometry of a particular class of null surfaces in space-time called vacuum Non-Expanding Horizons (NEHs). Using the spin-coefficient equation, we provide a complete description of the horizon geometry, as well as fixing a canonical choice of null tetrad and coordinates on a NEH. By looking for particular classes of null geodesic congruences which live exterior to NEHs but have the special property that their shear vanishes at the intersection with the horizon, a good cut formalism for NEHs is developed which closely mirrors asymptotic theory. In particular, we show that such null geodesic congruences are generated by arbitrary choice of a complex world-line in a complex four dimensional space, each such choice induces a CR structure on the horizon, and a particular world-line (and hence CR structure) may be chosen by transforming to a privileged tetrad frame.

T. M. Adamo; E. T. Newman

2009-08-05T23:59:59.000Z

284

Non-relativistic Geodesic Behaviors for a Massive Charged Particle Falling in de Sitter Spacetime  

E-Print Network (OSTI)

In this article, continuing the work done in the previous paper (M. Fathi 2012), we apply a Lagrangian formalism to demonstrate the shape of the geodesic motion for a massive charged particle which is falling freely in a de Sitter spacetime. We will show that a spiral shape of the trajectory is available, due to the logarithmic behavior of time, with respect to the proper time.

Farrin Payandeh; Mohsen Fathi

2012-10-10T23:59:59.000Z

285

Smart Grid Resources | Open Energy Information  

Open Energy Info (EERE)

Smart Grid Resources Smart Grid Resources Jump to: navigation, search Us.jpg US Resources The Smart Grid: An Introduction US Department of Energy Smart Grid Information Clearinghouse EIA Smartgrid.gov Energy.gov Smart Grid Smart Grid News http://www.smartgrid.gov/ SmartGrid.gov is a resource for information about the Smart Grid and government-sponsored Smart Grid projects. The information on SmartGrid.gov helps consumers and stakeholders understand the basics of a Smart Grid and the range of Smart Grid technologies, practices and benefits. What is the Smart Grid? Recovery Act Smart Grid Programs Project Reporting Project Information Tracking Deployment Title XIII of the Energy Independence and Security Act of 2007 sets forth the policy of the U.S: "to support the modernization of the nation's

286

Geodesic motion in the space-time of cosmic strings interacting via magnetic fields  

E-Print Network (OSTI)

We study the geodesic motion of test particles in the space-time of two Abelian-Higgs strings interacting via their magnetic fields. These bound states of cosmic strings constitute a field theoretical realization of p-q-strings which are predicted by inflationary models rooted in String Theory, e.g. brane inflation. In contrast to previously studied models describing p-q-strings our model possesses a Bogomolnyi-Prasad-Sommerfield (BPS) limit. If cosmic strings exist it would be exciting to detect them by direct observation. We propose that this can be done by the observation of test particle motion in the space-time of these objects. In order to be able to make predictions we have to solve the field equations describing the configuration as well as the geodesic equation numerically. The geodesics can then be classified according to the test particle's energy, angular momentum and momentum along the string axis. We find that the interaction of two Abelian-Higgs strings can lead to the existence of bound orbits that would be absent without the interaction. We also discuss the minimal and maximal radius of orbits and comment on possible applications in the context of gravitational wave emission.

Betti Hartmann; Valeria Kagramanova

2012-07-25T23:59:59.000Z

287

NVU dynamics. I. Geodesic motion on the constant-potential-energy hypersurface  

E-Print Network (OSTI)

An algorithm is derived for computer simulation of geodesics on the constant potential-energy hypersurface of a system of N classical particles. First, a basic time-reversible geodesic algorithm is derived by discretizing the geodesic stationarity condition and implementing the constant potential energy constraint via standard Lagrangian multipliers. The basic NVU algorithm is tested by single-precision computer simulations of the Lennard-Jones liquid. Excellent numerical stability is obtained if the force cutoff is smoothed and the two initial configurations have identical potential energy within machine precision. Nevertheless, just as for NVE algorithms, stabilizers are needed for very long runs in order to compensate for the accumulation of numerical errors that eventually lead to "entropic drift" of the potential energy towards higher values. A modification of the basic NVU algorithm is introduced that ensures potential-energy and step-length conservation; center-of-mass drift is also eliminated. Analytical arguments confirmed by simulations demonstrate that the modified NVU algorithm is absolutely stable. Finally, simulations show that the NVU algorithm and the standard leap-frog NVE algorithm have identical radial distribution functions for the Lennard-Jones liquid.

Trond S. Ingebrigtsen; Søren Toxvaerd; Ole J. Heilmann; Thomas B. Schrøder; Jeppe C. Dyre

2011-08-06T23:59:59.000Z

288

Technical and Economic Assessment of Off-grid, Mini-grid and...  

Open Energy Info (EERE)

Technologies Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Technical and Economic Assessment of Off-grid, Mini-grid and Grid Electrification Technologies Agency...

289

Smart Grid: Network simulator for smart grid test-bed  

Science Journals Connector (OSTI)

Smart Grid become more popular, a smaller scale of smart grid test-bed is set up at UNITEN to investigate the performance and to find out future enhancement of smart grid in Malaysia. The fundamental requirement in this project is design a network with low delay, no packet drop and with high data rate. Different type of traffic has its own characteristic and is suitable for different type of network and requirement. However no one understands the natural of traffic in smart grid. This paper presents the comparison between different types of traffic to find out the most suitable traffic for the optimal network performance.

L C Lai; H S Ong; Y X Che; N Q Do; X J Ong

2013-01-01T23:59:59.000Z

290

Smart Grid | Department of Energy  

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

Grid Grid Smart Grid Smart Grid "Smart grid" generally refers to a class of technology people are using to bring utility electricity delivery systems into the 21st century, using computer-based remote control and automation. These systems are made possible by two-way communication technology and computer processing that has been used for decades in other industries. They are beginning to be used on electricity networks, from the power plants and wind farms all the way to the consumers of electricity in homes and businesses. They offer many benefits to utilities and consumers -- mostly seen in big improvements in energy efficiency on the electricity grid and in the energy users' homes and offices. For a century, utility companies have had to send workers out to gather

291

Synchrony-optimized power grids  

E-Print Network (OSTI)

We investigate synchronization in power grids, which we assume to be modeled by a network of Kuramoto oscillators with inertia. More specifically, we study the optimization of the power grid topology to favor the network synchronization. We introduce a rewiring algorithm which consists basically in a hill climb scheme where the edges of the network are swapped in order enhance the main measures of synchronization. As a byproduct of the optimization algorithm, we typically have also the anticipation of the synchronization onset for the optimized network. We perform several robustness tests for the synchrony-optimized power grids, including the impact of consumption peaks. In our analyses, we investigate synthetic random networks, which we consider as hypothetical decentralized power generation situations, and also a network based in the actual power grid of Spain, which corresponds to the current paradigm of centralized power grids. The synchrony-optimized power grids obtained by our algorithm have some intere...

Pinto, Rafael S

2014-01-01T23:59:59.000Z

292

National Grid Energy Efficiency Plans  

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

Presentation covers the National Grid Energy Efficiency plans and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Providence, Rhode Island.

293

Sandia National Laboratories: SMART Grid  

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

Mesa del Sol, Microgrid, News, News & Events, Partnership, Photovoltaic, Renewable Energy, SMART Grid, Solar, Systems Analysis, Systems Engineering The Mesa del Sol...

294

2014 Modern Power Grid Video  

SciTech Connect

A video from NETL that describes the details of a modern power grid and how it can help our nation save on energy costs.

None

2014-06-02T23:59:59.000Z

295

Environmental Impact of Smart Grid  

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

pollutants * Evaluate impact from Smart Grid on reducing pollutants through: - Demand Response - Electric Vehicles - Demand Side Management - Renewables and Distributed Energy...

296

Sandia National Laboratories: grid modernization  

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

industriell og teknisk forskning) will now tackle energy challenges such as renewable-energy integration, grid modernization, gas technologies, and algae-based biofuels. SINTEF is...

297

Sandia National Laboratories: SMART Grid  

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

Integration, Infrastructure Security, Microgrid, News, News & Events, Partnership, SMART Grid Daniel Borneo and Ben Schenkman (both in Sandia's Energy Surety Engineering and...

298

Sandia National Laboratories: SMART Grid  

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

Microgrid, Modeling & Analysis, News, News & Events, Partnership, Renewable Energy, SMART Grid, Systems Analysis, Systems Engineering Mayor Says New System Will 'Keep Everyone...

299

Sandia National Laboratories: SMART Grid  

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

SMART Grid Federal Electric Regulatory Commission Revised Its Small Generator Interconnection Procedure and Small Generator Interconnection Agreement On March 4, 2014, in...

300

2014 Modern Power Grid Video  

ScienceCinema (OSTI)

A video from NETL that describes the details of a modern power grid and how it can help our nation save on energy costs.

None

2014-07-22T23:59:59.000Z

Note: This page contains sample records for the topic "geodesic grid coupled" 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

PRESENTATION: TRANSFORMATION OF THE GRID  

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

A briefing to the Secretary's Energy Advisory Board on the transformation of the grid delivered by Patricia Hoffman, U.S. Department of Energy.

302

US DRIVE Grid Interaction Technical Team Roadmap | Department...  

Energy Savers (EERE)

More Documents & Publications Grid Interaction Tech Team, and International Smart Grid Collaboration Grid Connectivity Research, Development & Demonstration Projects...

303

Software-Based Challenges of Developing the Future Distribution Grid  

E-Print Network (OSTI)

distribution  grid  can  provide  vital  information  for   reliability  distribution  grid   loads  in  order  to  ensure  grid  reliability.  

Stewart, Emma

2014-01-01T23:59:59.000Z

304

Smart Grid | OpenEI Community  

Open Energy Info (EERE)

Smart Grid Smart Grid Home Graham7781's picture Submitted by Graham7781(1992) Super contributor 16 August, 2013 - 12:21 New report from White House outlines largest problems facing United States energy grid energy grid OpenEI President Smart Grid United States White House Graham7781's picture Submitted by Graham7781(1992) Super contributor 15 August, 2013 - 09:09 DOE Report Describes Progress in the Deployment of Synchrophasor Technologies for Improved Grid Operations OpenEI PMU recovery act SGIG Smart Grid Graham7781's picture Submitted by Graham7781(1992) Super contributor 15 March, 2013 - 10:23 Quarterly Smart Grid Data available for download on OpenEI data download OpenEI quarterly Smart Grid Smartgrid.gov SmartGrid.gov is a resource for information about the Smart Grid and government-sponsored Smart Grid projects. The information on SmartGrid.gov

305

Large power grid analysis using domain decomposition  

E-Print Network (OSTI)

Large power grid analysis using domain decomposition Quming Zhou, Kai Sun, Kartik Mohanram, Danny C referred to as the power grid. The power grid for a modern integrated circuit may consist of several grid is traditionally described as a large-scale linear system. Simulation of power grids usually

Mohanram, Kartik

306

Micro-grids: Practical applications of grid technology to small distributed collaborations  

E-Print Network (OSTI)

Micro-Grids: Practical Applications of Grid Technology toof the normal use of the micro-grid we have been describing.Grid system that was used in the Matisse project. MEMS Technology Micro-

Lee, Jason R.

2001-01-01T23:59:59.000Z

307

EconoGrid: A detailed Simulation Model of a Standards-based Grid Compute Economy  

E-Print Network (OSTI)

EconoGrid: A detailed Simulation Model of a Standards-based Grid Compute Economy EconoGrid is a detailed simulation model, implemented in SLX1 , of a grid compute economy that implements selected

308

Grid Storage and the Energy Frontier Research Centers | Department...  

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

Grid Storage and the Energy Frontier Research Centers Grid Storage and the Energy Frontier Research Centers DOE: Grid Storage and the Energy Frontier Research Centers Grid Storage...

309

Grid4EU (Smart Grid Project) (Italy) | Open Energy Information  

Open Energy Info (EERE)

Grid4EU (Smart Grid Project) (Italy) Grid4EU (Smart Grid Project) (Italy) Jump to: navigation, search Project Name Grid4EU Country Italy Coordinates 41.910454°, 12.65625° 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":41.910454,"lon":12.65625,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

310

Smart Grid Savings and Grid Integration of Renewables in Idaho  

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

1 1 Smart Grid Savings and Grid Integration of Renewables in Idaho Idaho Power Company (IPC) serves more than 495,000 customers in southern Idaho and eastern Oregon. IPC is vertically-integrated and manages power generation, transmission, distribution, and demand-side resources. Faced with grid modernization challenges from new wind power capacity, rising summer peak demands, and aging electricity delivery infrastructure, IPC's Smart Grid Investment Grant (SGIG) project is multi-faceted and covers all aspects of its electric operations. The IPC project involves a total budget of $94 million which includes $47million in Recovery Act funds from the U.S. Department of Energy (DOE). The DOE funds have accelerated IPC's grid

311

Elforsk Smart grid programme (Smart Grid Project) | Open Energy Information  

Open Energy Info (EERE)

Elforsk Smart grid programme (Smart Grid Project) Elforsk Smart grid programme (Smart Grid Project) Jump to: navigation, search Project Name Elforsk Smart grid programme Country SVEZIA Coordinates 60.128162°, 18.643501° 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":60.128162,"lon":18.643501,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

312

Fieldtrail Mobile Smart Grid (Smart Grid Project) | Open Energy Information  

Open Energy Info (EERE)

Fieldtrail Mobile Smart Grid (Smart Grid Project) Fieldtrail Mobile Smart Grid (Smart Grid Project) Jump to: navigation, search Project Name Fieldtrail Mobile Smart Grid Country Netherlands Headquarters Location Rosmalen, Netherlands Coordinates 51.719166°, 5.367222° 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":51.719166,"lon":5.367222,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

313

GROWDERS Demonstration of Grid Connected Electricity Systems (Smart Grid  

Open Energy Info (EERE)

GROWDERS Demonstration of Grid Connected Electricity Systems (Smart Grid GROWDERS Demonstration of Grid Connected Electricity Systems (Smart Grid Project) Jump to: navigation, search Project Name GROWDERS Demonstration of Grid Connected Electricity Systems Country France Coordinates 46.134171°, 1.933594° 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":46.134171,"lon":1.933594,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

314

Customer Value Proposition Smart Grid (KEL) (Smart Grid Project) | Open  

Open Energy Info (EERE)

Proposition Smart Grid (KEL) (Smart Grid Project) Proposition Smart Grid (KEL) (Smart Grid Project) Jump to: navigation, search Project Name Customer Value Proposition Smart Grid (KEL) Country Sweden Headquarters Location Gothenburg, Sweden Coordinates 57.696995°, 11.9865° 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":57.696995,"lon":11.9865,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

315

2012 Smart Grid Peer Review Presentations- Day 2 Smart Grid Panel Discussion  

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

Presentations from the Smart Grid panel discussion during Day 2 of the 2012 Smart Grid R&D Peer Review

316

Grid Computing: Application to Science  

E-Print Network (OSTI)

-- 17 Athlon XP 1900+ Hybrid MD/QM simulation on a Grid of distributed PC clusters in the US & Japan MDGrid Computing: Application to Science Aiichiro Nakano Collaboratory for Advanced Computing Science University of Southern California Email: anakano@usc.edu #12;Grid Computing NASA NAS IPG · World

Southern California, University of

317

Cybersecurity and the Smarter Grid  

Science Journals Connector (OSTI)

Reliability remains a fundamental principle of grid modernization efforts, but in today's world, reliability requires cybersecurity. This article discusses energy sector partnerships that are designing cybersecurity into the smart grid with the vision of surviving a cyber-incident while sustaining critical energy delivery functions.

Carol Hawk; Akhlesh Kaushiva

2014-01-01T23:59:59.000Z

318

Environmental Impact of Smart Grid  

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

Impact of Smart Grid Impact of Smart Grid January 10, 2011 2 Agenda * Review of Paper - Introduction - Key Areas of Impact - Findings - Conclusions - Recommended Topics for Further Research 3 3 Introduction Provide background for the current state of environmental impact of Smart Grid * Summarize key components of criteria pollutants from electricity and transportation sectors * Define the Smart Grid and how it can be used to reduce pollutants * Evaluate impact from Smart Grid on reducing pollutants through: - Demand Response - Electric Vehicles - Demand Side Management - Renewables and Distributed Energy Resources - Transmission and Distribution Systems Use this knowledge to address topics for further research Key Areas of Impact 5 Key Areas of Review and Consideration for Environmental Impacts *

319

Smart Grid | Open Energy Information  

Open Energy Info (EERE)

US Recovery Act Smart Grid Projects US Recovery Act Smart Grid Projects * US Recovery Act Smart Grid Investment Grant Projects (98) The Smart Grid Investment Grant (SGIG) program is authorized by the Energy Independence and Security Act of 2007, Section 1306, as amended by the Recovery Act. The purpose of the grant program is to accelerate the modernization of the nation's electric transmission and distribution systems and promote investments in smart grid technologies, tools, and techniques that increase flexibility, functionality, interoperability, cyber security, situational awareness, and operational efficiency. Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":500,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026

320

Rectangle Free Coloring of Grids  

E-Print Network (OSTI)

A two-dimensional \\emph{grid} is a set $\\Gnm = [n]\\times[m]$. A grid $\\Gnm$ is \\emph{$c$-colorable} if there is a function $\\chi_{n,m}: \\Gnm \\to [c]$ such that there are no rectangles with all four corners the same color. We address the following question: for which values of $n$ and $m$ is $\\Gnm$ $c$-colorable? This problem can be viewed as a bipartite Ramsey problem and is related to a the Gallai-Witt theorem (also called the multidimensioanl Van Der Waerden's Theorem). We determine (1) \\emph{exactly} which grids are 2-colorable, (2) \\emph{exactly} which grids are 3-colorable, and (3) (assuming a conjecture) \\emph{exactly} which grids are 4-colorable. We use combinatorics, finite fields, and tournament graphs.

Fenner, Stephen; Glover, Charles; Purewal, Semmy

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "geodesic grid coupled" 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

PHEV and Grid Interfacing  

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

Materials and Processes for High Materials and Processes for High Temperature Packaging of Power Electronic Devices G. Muralidharan, A. Kercher, M. L. Santella, R. Battiste Materials Science and Technology Division Oak Ridge National Laboratory, Oak Ridge, TN L. Seiber, and Burak Ozpineci Engineering Science and Technology Division Oak Ridge National Laboratory Sept. 30, 2008 Energy Storage and Power Electronics Peer Review 2 Managed by UT-Battelle for the U.S. Department of Energy Power Electronics research needs are necessary at many levels System Reliability Next Generation Equipment Power Electronic Module Development Applied Materials Research This project addresses these two levels 3 Managed by UT-Battelle for the U.S. Department of Energy Purpose of Work ï‚· Realization of the future electric grid depends on the availability of

322

GridWise Alliance  

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

GRIDWISE GRIDWISE ® ALLIANCE Advocating for a smarter grid Federal Utility Partnership Working Group Biloxi, MS May 5, 2009 THE GRIDWISE ALLIANCE Formed in September 2003 Committed to increasing knowledge among industry stakeholders, promoting understanding of the roles, benefits, and costs, and supporting RD&D initiatives and public- private partnerships. THE ALLIANCE OUR CURRENT MEMBERSHIP 83 members represent a broad cross-section of energy and electricity industry stakeholders Also forming strategic partnerships with organizations and government entities Financial 2.6% Analysts 2.6% Organizations 2.6% Consultants 6.4% Utilities 20.5% Software 11.5% Large Technology 23.1% Small Technology 23.1% Academia 6.4% Renewables 1.3% OUR MEMBERS (as of April 2, 2009) * 3TIER * ABB

323

Security Issues in Virtual Grid Environments  

Science Journals Connector (OSTI)

Computational Grids (or simply Grids) enable access to a large number of ... processing, memory, and storage devices. Usually, Grids are used for running very specific applications ... not much attention has been...

Jose L. Muñoz; Josep Pegueroles; Jordi Forné…

2004-01-01T23:59:59.000Z

324

Survey of Security Challenges in Grid Environment  

Science Journals Connector (OSTI)

Use of grid systems has increased tremendously since their inception in 90’s. With grids, users execute the jobs without knowing which ... run their jobs. An important aspect of grids is Virtual Organization (VO)...

Usman Ahmad Malik; Mureed Hussain…

2011-01-01T23:59:59.000Z

325

Parametrization-independent elliptic surface grid generation  

E-Print Network (OSTI)

The generation of computational grids on surfaces of three-dimensional configurations is an important component of many areas of computational research, both as a boundary grid for volume grid generation or to perform ...

Rasmussen, Britt Bille

2009-01-01T23:59:59.000Z

326

The Smart Electricity Grid and Scientific Research  

Science Journals Connector (OSTI)

...this early and critical stage of the smart grid's development, with legislation...States for information management of smart grid devices (www.nist.gov/smartgrid...Standards and Technology (NIST) , Smart Grid Cyber Security Strategy and Requirements...

Jan Beyea

2010-05-21T23:59:59.000Z

327

Renewables Test IQ of the Grid  

Science Journals Connector (OSTI)

...obscure the sun. Calls for a “smart grid” have become routine in Washington...includes $4.5 billion for “smart grid demonstration projects.” Utilities...Several technologies in a future “smart grid” could help manage this dance...

Dan Charles

2009-04-10T23:59:59.000Z

328

electricity grid | OpenEI Community  

Open Energy Info (EERE)

electricity grid Home Dc's picture Submitted by Dc(107) Contributor 31 October, 2014 - 10:58 What do you know about the grid? black out brown out bulk power system electricity grid...

329

GridWise Alliance | Open Energy Information  

Open Energy Info (EERE)

GridWise Alliance Jump to: navigation, search Name: GridWise Alliance Place: Washington, DC Zip: 20005 Product: String representation "The GridWise Al ... to key issues." is too...

330

Smart Grid Status and Metrics Report  

SciTech Connect

To convey progress made in achieving the vision of a smart grid, this report uses a set of six characteristics derived from the National Energy Technology Laboratory Modern Grid Strategy. It measures 21 metrics to provide insight into the grid’s capacity to embody these characteristics. This report looks across a spectrum of smart grid concerns to measure the status of smart grid deployment and impacts.

Balducci, Patrick J.; Weimar, Mark R.; Kirkham, Harold

2014-07-01T23:59:59.000Z

331

Building Technologies Office: Buildings to Grid Integration  

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

Buildings to Grid Buildings to Grid Integration to someone by E-mail Share Building Technologies Office: Buildings to Grid Integration on Facebook Tweet about Building Technologies Office: Buildings to Grid Integration on Twitter Bookmark Building Technologies Office: Buildings to Grid Integration on Google Bookmark Building Technologies Office: Buildings to Grid Integration on Delicious Rank Building Technologies Office: Buildings to Grid Integration on Digg Find More places to share Building Technologies Office: Buildings to Grid Integration on AddThis.com... About Take Action to Save Energy Partner with DOE Activities Appliances Research Building Envelope Research Windows, Skylights, & Doors Research Space Heating & Cooling Research Water Heating Research Lighting Research

332

Power Grid Correction Using Sensitivity Analysis.  

E-Print Network (OSTI)

??Power grid voltage integrity verification requires checking if all the voltage drops on the grid are less than a certain threshold that guarantees proper circuit… (more)

Aydonat, Meric

2010-01-01T23:59:59.000Z

333

Sandia National Laboratories: power-grid analysis  

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

power-grid analysis New Jersey Transit FutureGrid MOU Signing On October 4, 2013, in Analysis, Energy Surety, Infrastructure Security, Microgrid, Modeling, Modeling & Analysis,...

334

Sandia National Laboratories: Distribution Grid Integration  

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

Distribution Grid Integration ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety,...

335

Sandia National Laboratories: Solar Energy Grid Intergration...  

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

Grid Intergration Systems ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities,...

336

Deriving Policies from Grid Security Requirements Model  

Science Journals Connector (OSTI)

The emerging Grid applications require rigorous approaches to handle security management issues as their scale, heterogeneity, ... , we propose a rigorous method of deriving security policies for grid application...

Syed Naqvi; Alvaro E. Arenas…

2008-01-01T23:59:59.000Z

337

Intrinsic security in SORCER (Service Oriented) grid.  

E-Print Network (OSTI)

??A grid is a vast repository of virtual services. SORCER is a computational grid environment based on the Service Oriented Paradigm. Security and trust, in… (more)

Rai, Abhijit

2006-01-01T23:59:59.000Z

338

Grid Security Loopholes with Proposed Countermeasures  

Science Journals Connector (OSTI)

Grid computing is an emergent computing innovation which ... to research on attribute based access control for grid computing, security mechanism to authorize and authenticate users, before accessing information ...

Nureni Ayofe Azeez; Tiko Iyamu; Isabella M. Venter

2012-01-01T23:59:59.000Z

339

Intrinsic security in SORCER (service oriented) grid.  

E-Print Network (OSTI)

??A grid is a vast repository of virtual services. SORCER is a computational grid environment based on the Service Oriented Paradigm. Security and trust, in… (more)

Rai, Abhijit

2005-01-01T23:59:59.000Z

340

Sandia National Laboratories: energy resilient smart grid  

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

resilient smart grid Hoboken Hopes To Reduce Power Outages With New 'Smart Grid' System On June 20, 2013, in Energy, Energy Assurance, Energy Storage, Energy Storage Systems,...

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Sandia National Laboratories: smart-grid technologies  

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

smart-grid technologies New Jersey Transit FutureGrid MOU Signing On October 4, 2013, in Analysis, Energy Surety, Infrastructure Security, Microgrid, Modeling, Modeling & Analysis,...

342

Reliability evaluation of smart distribution grids.  

E-Print Network (OSTI)

??The term "Smart Grid" generally refers to a power grid equipped with the advanced technologies dedicated for purposes such as reliability improvement, ease of control… (more)

Kazemi, Shahram

2011-01-01T23:59:59.000Z

343

Sandia National Laboratories: Distribution Grid Integration  

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

Specialists Conference On July 31, 2014, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities, Grid Integration, Infrastructure Security, News, News &...

344

Using the Model Coupling Toolkit to couple earth system models  

Science Journals Connector (OSTI)

Continued advances in computational resources are providing the opportunity to operate more sophisticated numerical models. Additionally, there is an increasing demand for multidisciplinary studies that include interactions between different physical processes. Therefore there is a strong desire to develop coupled modeling systems that utilize existing models and allow efficient data exchange and model control. The basic system would entail model “1” running on “M” processors and model “2” running on “N” processors, with efficient exchange of model fields at predetermined synchronization intervals. Here we demonstrate two coupled systems: the coupling of the ocean circulation model Regional Ocean Modeling System (ROMS) to the surface wave model Simulating \\{WAves\\} Nearshore (SWAN), and the coupling of ROMS to the atmospheric model Coupled Ocean Atmosphere Prediction System (COAMPS). Both coupled systems use the Model Coupling Toolkit (MCT) as a mechanism for operation control and inter-model distributed memory transfer of model variables. In this paper we describe requirements and other options for model coupling, explain the MCT library, ROMS, SWAN and COAMPS models, methods for grid decomposition and sparse matrix interpolation, and provide an example from each coupled system. Methods presented in this paper are clearly applicable for coupling of other types of models.

John C. Warner; Natalie Perlin; Eric D. Skyllingstad

2008-01-01T23:59:59.000Z

345

-1 -0.5 0 0.5 1 Left system with Double-Geodesic control law  

E-Print Network (OSTI)

;#12;#12;#12;#12;#12;#12;#12;#12;-1 -0.5 0 0.5 1 -1 -0.5 0 0.5 1 x (cm) y(cm) Left system with Double-Geodesic control law -1 -0.5 0 0 (cm) y(cm) Right system with Double-Geodesic control law -1 -0.5 0 0.5 1 -1 -0.5 0 0.5 1 x (cm) y with Double-Geodesic control law -1 -0.5 0 0.5 1 -1 -0.5 0 0.5 1 x (cm) y(cm) Left system with Log control law

Murray, Richard M.

346

Buildings-to-Grid Technical Opportunities: From the Grid Perspective  

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

This report outlines the nature of the power grid, lists challenges and barriers to the implementation of a transactive energy ecosystem, and provides concept solutions to current technological impediments.

347

National Smart Water Grid  

SciTech Connect

The United States repeatedly experiences floods along the Midwest's large rivers and droughts in the arid Western States that cause traumatic environmental conditions with huge economic impact. With an integrated approach and solution these problems can be alleviated. Tapping into the Mississippi River and its tributaries, the world's third largest fresh water river system, during flood events will mitigate the damage of flooding and provide a new source of fresh water to the Western States. The trend of increased flooding on the Midwest's large rivers is supported by a growing body of scientific literature. The Colorado River Basin and the western states are experiencing a protracted multi-year drought. Fresh water can be pumped via pipelines from areas of overabundance/flood to areas of drought or high demand. Calculations document 10 to 60 million acre-feet (maf) of fresh water per flood event can be captured from the Midwest's Rivers and pumped via pipelines to the Colorado River and introduced upstream of Lake Powell, Utah, to destinations near Denver, Colorado, and used in areas along the pipelines. Water users of the Colorado River include the cities in southern Nevada, southern California, northern Arizona, Colorado, Utah, Indian Tribes, and Mexico. The proposed start and end points, and routes of the pipelines are documented, including information on right-of-ways necessary for state and federal permits. A National Smart Water Grid{trademark} (NSWG) Project will create thousands of new jobs for construction, operation, and maintenance and save billions in drought and flood damage reparations tax dollars. The socio-economic benefits of NWSG include decreased flooding in the Midwest; increased agriculture, and recreation and tourism; improved national security, transportation, and fishery and wildlife habitats; mitigated regional climate change and global warming such as increased carbon capture; decreased salinity in Colorado River water crossing the US-Mexico border; and decreased eutrophication (excessive plant growth and decay) in the Gulf of Mexico to name a few. The National Smart Water Grid{trademark} will pay for itself in a single major flood event.

Beaulieu, R A

2009-07-13T23:59:59.000Z

348

2244 IEEE TRANSACTIONS ON SMART GRID, VOL. 4, NO. 4, DECEMBER 2013 Modeling and Stochastic Control for  

E-Print Network (OSTI)

2244 IEEE TRANSACTIONS ON SMART GRID, VOL. 4, NO. 4, DECEMBER 2013 Modeling and Stochastic Control simulations coupled with real data measurements are used for performance evaluation and comparison studies is the fundamental tradeoff between costs and quality of services. The advent of "smart grid" will likely advance

Tong, Lang

349

GridWise: Transforming the Power Grid with Information Technology  

SciTech Connect

GridWise™ is a vision for the future electric system shared by a new DOE initiative and an industry alliance. GridWise is built upon the fundamental premise that information technology will profoundly transform the plan¬ning and operation of the power grid, just at is has changed business, education, and entertainment. The electric power system has served us remarkably well for over half a century. However, with business-as-usual solutions, the U.S. will invest around $450 billion in conventional electric infrastructure—generation, transmission, and distribution—over the next 20 years just to meet demand for a growing population and economy. Even more investment will be needed to relieve the growing backlog of deferred transmission additions. Since the mortgage on infrastructure is a major component of electric rates, economic prosperity and our way of life depend upon minimizing the need for new infrastructure by increasing the utilization of these assets. This paper discusses the GridWise vision and describes some example technologies and how they are woven together to fundamentally alter the way the power grid works. The benefits of an information-rich power system and key elements of the DOE’s new GridWise initiative are also presented.

Pratt, Robert G.; Lightner, Eric M.

2004-10-28T23:59:59.000Z

350

YNOGK: A NEW PUBLIC CODE FOR CALCULATING NULL GEODESICS IN THE KERR SPACETIME  

SciTech Connect

Following the work of Dexter and Agol, we present a new public code for the fast calculation of null geodesics in the Kerr spacetime. Using Weierstrass's and Jacobi's elliptic functions, we express all coordinates and affine parameters as analytical and numerical functions of a parameter p, which is an integral value along the geodesic. This is the main difference between our code and previous similar ones. The advantage of this treatment is that the information about the turning points does not need to be specified in advance by the user, and many applications such as imaging, the calculation of line profiles, and the observer-emitter problem, become root-finding problems. All elliptic integrations are computed by Carlson's elliptic integral method as in Dexter and Agol, which guarantees the fast computational speed of our code. The formulae to compute the constants of motion given by Cunningham and Bardeen have been extended, which allow one to readily handle situations in which the emitter or the observer has an arbitrary distance from, and motion state with respect to, the central compact object. The validation of the code has been extensively tested through applications to toy problems from the literature. The source FORTRAN code is freely available for download on our Web site http://www1.ynao.ac.cn/{approx}yangxl/yxl.html.

Yang Xiaolin; Wang Jiancheng, E-mail: yangxl@ynao.ac.cn [National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 (China)

2013-07-01T23:59:59.000Z

351

YNOGK: A new public code for calculating null geodesics in the Kerr spacetime  

E-Print Network (OSTI)

Following \\cite{dexagol2009} we present a new public code for the fast calculation of null geodesics in the Kerr spacetime. Using Weierstrass' and Jacobi's elliptic functions, we express all coordinates and affine parameters as analytical and numerical functions of a parameter $p$, which is an integral value along the geodesic. This is a main difference of our code compares with previous similar ones. The advantage of this treatment is that the information about the turning points do not need to be specified in advance by the user, and many applications such as imaging, the calculation of line profiles or the observer-emitter problem, etc become root finding problems. All elliptic integrations are computed by Carlson's elliptic integral method as \\cite{dexagol2009} did, which guarantees the fast computational speed of our code. The formulae to compute the constants of motion given by \\cite{cunnbard1973} have been extended, which allow one readily to handle the situations, in which the emitter or the observer has arbitrary distance and motion state with respect to the central compact object. The validation of the code has been extensively tested by its application to toy problems from the literature. The source FORTRAN code is freely available for download on the web.

Xiaolin Yang; Jiancheng Wang

2013-05-06T23:59:59.000Z

352

YNOGK: A new public code for calculating null geodesics in the Kerr spacetime  

E-Print Network (OSTI)

Following \\cite{dexagol2009} we present a new public code for the fast calculation of null geodesics in the Kerr spacetime. Using Weierstrass' and Jacobi's elliptic functions, we express all coordinates and affine parameters as analytical and numerical functions of a parameter $p$, which is an integral value along the geodesic. This is a main difference of our code compares with previous similar ones. The advantage of this treatment is that the information about the turning points do not need to be specified in advance by the user, and many applications such as imaging, the calculation of line profiles or the observer-emitter problem, etc become root finding problems. All elliptic integrations are computed by Carlson's elliptic integral method as \\cite{dexagol2009} did, which guarantees the fast computational speed of our code. The formulae to compute the constants of motion given by \\cite{cunnbard1973} have been extended, which allow one readily to handle the situations, in which the emitter or the observer ...

Yang, Xiaolin

2013-01-01T23:59:59.000Z

353

On the usability of grid middleware and security mechanisms  

Science Journals Connector (OSTI)

...Paul Watson On the usability of grid middleware and security mechanisms Stefan J. Zasada...computational-grids. grid usability|grid security|Application Hosting Environment...essential for the uptake of any grid security solution. The problems stem...

2011-01-01T23:59:59.000Z

354

Argonne TTRDC - Smart Grid - Projects  

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

Projects Projects smart grid plug The SAE J-1772 plug-in vehicle connector facilitates both charging and communication. compact metrology A prototype of Argonne's compact metrology system smart grid radio FPGA Field programmable gate array (FPGA) technologies to develop improved software-defined radios for the smart grid Codes and Standards Development Argonne researchers are helping create codes and standards that will enable widespread adoption of electric-drive transportation with smart grid interoperability. For example, the Society of Automotive Engineers' (SAE) J1772 connection standard will enable manufacturers to build compatible connector plugs and vehicle sockets that support both charging and two-way communication with utility companies. Another standard, SAE J2847, will

355

Consumer Acceptance Of Smart Grid  

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

Consumer Acceptance Of Smart Consumer Acceptance Of Smart Grid Electricity Advisory Committee June 6, 2013 Thanks To * Sonny Popowsky * Sue Kelly * Phyllis Reha * Bob Curry * Paul Centolella * Chris Peters * David Till * Paul Hudson * Tom Sloan * Wanda Reder Paper Objective * End-Use Consumer Acceptance Of Smart Grid Critical To Infrastructure Investments Being Fully Realized * While Utilities & Regulators Have Prime Role In Shaping SG, There Is Role For DOE As Facilitator & Educator * Focus Of This Paper Is On Systems Installed Inside Homes & Businesses Issues Experienced In Early Smart Grid Roll-Outs * Initial Resistance By Some End-Use Consumer Groups To Smart Grid Installation * Early Technology Roll-Outs Were Not Prepared For This Pushback * Since These Initial Efforts, Lessons-Learned

356

Open Science Grid at NERSC  

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

Open Science Open Science Grid Open Science Grid at NERSC | Tags: Grid NERSC provides computing to Open Science Grid (OSG) users through a special allocation. OSG Users must submit an OSG new user request form. This gives them access to NERSC resources, using the standard OSG interfaces. Users must also complete a NERSC Computer Usage Policy Form before their access to NERSC can be activated. In order to run at NERSC, an OSG user must go through the following process. If you already have a NERSC account, skip to step 5. Apply for a NERSC account through the OSG new user request form. Read and sign the NERSC Computer Usage Policy Form. Mail or fax the above form to NERSC Account support. Contact the person in charge of the group's activity at NERSC. By default, you will be associated with the OSG allocation and your P.I./P.I.

357

Switched on to mini grids  

Science Journals Connector (OSTI)

A BILLION AND a half people around the world still don't have access to electricity. Could hybrid mini grids be the best way to provide electricity – particularly to rural, often isolated, areas?

Simon Rolland

2011-01-01T23:59:59.000Z

358

National Transmission Grid Study: 2002  

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

National Transmission Grid Study: The National Energy Policy Plan directed the U.S. Department of Energy (DOE) to conduct a study to examine the benefits of establishing a national electricity...

359

Grid Pricing of Fed Cattle  

E-Print Network (OSTI)

There are several value-based fed cattle pricing systems, including formula pricing, price grids and alliances. This publication describes the different cattle pricing methods and helps you decide which is best for you....

Schroeder, Ted C.; Hogan, Robert J.; Anderson, David P.

2009-03-02T23:59:59.000Z

360

Reinventing Batteries for Grid Storage  

ScienceCinema (OSTI)

The City University of New York's Energy Institute, with the help of ARPA-E funding, is creating safe, low cost, rechargeable, long lifecycle batteries that could be used as modular distributed storage for the electrical grid. The batteries could be used at the building level or the utility level to offer benefits such as capture of renewable energy, peak shaving and microgridding, for a safer, cheaper, and more secure electrical grid.

Banerjee, Sanjoy

2013-05-29T23:59:59.000Z

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Smart Wire Grid: Resisting Expectations  

ScienceCinema (OSTI)

Smart Wire Grid's DSR technology (Discrete Series Reactor) can be quickly deployed on electrical transmission lines to create intelligent mesh networks capable of quickly rerouting electricity to get power where and when it's needed the most. With their recent ARPA-E funding, Smart Wire Grid has been able to move from prototype and field testing to building out a US manufacturing operation in just under a year.

Ramsay, Stewart; Lowe, DeJim

2014-04-09T23:59:59.000Z

362

Smart Wire Grid: Resisting Expectations  

SciTech Connect

Smart Wire Grid's DSR technology (Discrete Series Reactor) can be quickly deployed on electrical transmission lines to create intelligent mesh networks capable of quickly rerouting electricity to get power where and when it's needed the most. With their recent ARPA-E funding, Smart Wire Grid has been able to move from prototype and field testing to building out a US manufacturing operation in just under a year.

Ramsay, Stewart; Lowe, DeJim

2014-03-03T23:59:59.000Z

363

Technical Meeting: Buildings-to-Grid Integration  

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

Background material from the December 2012, Buildings to Grid Integration Technical Meeting in Golden, CO.

364

Brookhaven National Laboratory Smarter Grid Centers  

E-Print Network (OSTI)

of electric power · Ensure the security of the Smart Grid and implement the biggest energy technologyBrookhaven National Laboratory Smarter Grid Centers Stephanie Hamilton Global & Regional Solutions Smarter Grid R&D April 12th, 2012 #12;2 Outline DOE's Smarter Grid BNL's strategic plans for energy

Homes, Christopher C.

365

Course Description Grid Computing, NGSSC, 2p  

E-Print Network (OSTI)

#12;­ Grid security: Grid security demands and solutions for, e.g., authen- tication, authorityCourse Description Grid Computing, NGSSC, 2p Erik Elmroth, Olle Mulmo, and Leif Nixon February 14, 2003 General information This course is designed to give a broad overview of the concept of grid comput

Elmroth, Erik

366

Bridging Organizational Network Boundaries on the Grid  

E-Print Network (OSTI)

-productivity. Security issues studied in Grid applications include issues of authentication [18]. There is an obvious]. The mishandling of interoperability between domain security policies, or its total absence, can break grid], can block grid applications that need to go on the network. We refer to this as the grid security

Abramson, David

367

Grid Architecture Release 2.3  

E-Print Network (OSTI)

Draft Grid Architecture Release 2.3 November 2014 Draft #12;Grid Architecture Release 2.3 November..................................................................................................... 2.1 3.0 Brief Introduction to Grid Architecture........................................................................................ 3.2 3.1 How Grid Architecture Can Be Used

368

Towards Privacy Protection in Smart Grid  

Science Journals Connector (OSTI)

The smart grid is an electronically controlled electrical grid that connects power generation, transmission, distribution, and consumers using information communication technologies. One of the key characteristics of the smart grid is its support for ... Keywords: Authentication, Confidentiality, Energy, Privacy, Smart grid

Sherali Zeadally; Al-Sakib Khan Pathan; Cristina Alcaraz; Mohamad Badra

2013-11-01T23:59:59.000Z

369

Principal Characteristics of a Modern Grid  

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

Grid: Grid: Features, Benefits and Costs Illinois Smart Grid Initiative Joe Miller - Modern Grid Strategy Team July 8, 2008 Conducted by the National Energy Technology Laboratory Funded by the U.S. Department of Energy Office of Electricity Delivery and Energy Reliability 2 Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y 2 Today's topics Why modernize the grid? What is the Smart Grid? What is the value proposition? Questions 3 MODERN GRID S T R A T E G Y Why modernize the grid? 4 Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y Platform for Prosperity Economy now based on electricity Computers, networks, phone system, devices, robotic manufacturing, stock markets Lifestyle now based on electricity

370

Principal Characteristics of a Modern Grid  

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

PSC Missouri - Utility Meeting PSC Missouri - Utility Meeting Joe Miller, Steve Pullins - Modern Grid Team January 9, 2008 1 Conducted by the National Energy Technology Laboratory Funded by the U.S. Department of Energy, Office of Electricity Delivery and Energy Reliability 2 Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y Agenda Topics What is the Modern Grid Strategy? What is the Modern Grid? Why do we need to modernize the grid? What are some of the benefits? How do we achieve a Modern Grid? What are some of the metrics? What are others doing to modernize? MODERN GRID S T R A T E G Y What is the Modern Grid Strategy? 4 Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y The Modern Grid Strategy (MGS)

371

Principal Characteristics of a Modern Grid  

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

Smart Grid - What's so Smart About It? Smart Grid - What's so Smart About It? An Educational Forum on Smart Grids Joe Miller - Modern Grid Strategy Team June 24, 2008 1 Conducted by the National Energy Technology Laboratory Funded by the U.S. Department of Energy Office of Electricity Delivery and Energy Reliability 2 Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y 2 Agenda What is the Smart Grid? EISA 2007 Highlights DOE Activities Questions MODERN GRID S T R A T E G Y What is the Smart Grid? 4 Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y 4 What is the role of the MGS? Develop a vision for the Smart Grid Reach out to stakeholders to get input Assist in the identification and resolution of barriers &

372

Principal Characteristics of a Modern Grid  

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

Modern Grid Modern Grid Wisconsin Public Utility Institute and UW Energy Institute Joe Miller, Steve Pullins, Steve Bossart - Modern Grid Team April 29, 2008 1 Conducted by the National Energy Technology Laboratory Funded by the U.S. Department of Energy, Office of Electricity Delivery and Energy Reliability 2 Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y Today's Objectives To share our views on several Modern Grid concepts: What is the Modern Grid Strategy? What is the Modern (Smart) Grid? Why do we need to modernize? What are some of the benefits? What are some of the barriers? How do we achieve a Modern Grid? MODERN GRID S T R A T E G Y What is the Modern Grid Strategy? 4 Office of Electricity Delivery and Energy

373

Electricity Advisory Committee Smart Grid Subcommittee  

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

Smart Grid Subcommittee Smart Grid Subcommittee Update to the 2008 EAC Report Smart Grid: Enabler of the New Energy Economy Report Recommendations May 10, 2011 Recommendations from the 2008 EAC Smart Grid Report (http://www.oe.energy.gov/DocumentsandMedia/final-smart-grid-report.pdf) 1. Create a Smart Grid Program office within DOE. Update: Completed. DOE's Office of Electricity Delivery and Energy Reliability (OE) has an active Smart Grid Program, which includes the Smart Grid Investment Grant (SGIG) and the Smart Grid Demonstration Programs (SGDP) funded by the American Recovery and Reinvestment Act of 2009 (ARRA) in addition to the already existing Smart Grid Research &Development (R&D) Program. FY 2012 OE Budget: $238 million: Emphasis on the integration of renewable energy sources, focuses on long-term system

374

Grid Integration of Offshore Windparks (Smart Grid Project) | Open Energy  

Open Energy Info (EERE)

of Offshore Windparks (Smart Grid Project) of Offshore Windparks (Smart Grid Project) Jump to: navigation, search Project Name Grid Integration of Offshore Windparks Country Germany Coordinates 51.165691°, 10.451526° 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":51.165691,"lon":10.451526,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

375

EcoGrid EU (Smart Grid Project) | Open Energy Information  

Open Energy Info (EERE)

(Smart Grid Project) (Smart Grid Project) Jump to: navigation, search Project Name EcoGrid EU Country Denmark Headquarters Location Bornholm, Denmark Coordinates 55.160427°, 14.866884° 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":55.160427,"lon":14.866884,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

376

GridWise Alliance: Smart Grid RFI: Addressing Policy and Logistical  

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

GridWise Alliance: Smart Grid RFI: Addressing Policy and Logistical GridWise Alliance: Smart Grid RFI: Addressing Policy and Logistical Challenges GridWise Alliance: Smart Grid RFI: Addressing Policy and Logistical Challenges The GridWise Alliance is a coalition of over 150 companies, organizations, and academic institutions advocating for a smart grid for a more sustainable future. We are consensus-driven and technology neutral and do not advocate for specific platforms or technologies, but, rather, for policies that will move the entire market forward to create jobs, provide clean energy solutions, and increase the reliability, flexibility, and efficiency of our electric grid. GridWise Alliance: Smart Grid RFI: Addressing Policy and Logistical Challenges More Documents & Publications WHAT A SMART GRID MEANS TO OUR NATION'S FUTURE.

377

Smart Grid Consortium, Response of New York State Smart Grid Addressing  

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

Smart Grid Consortium, Response of New York State Smart Grid Smart Grid Consortium, Response of New York State Smart Grid Addressing Policy and Logistical Challenges Smart Grid Consortium, Response of New York State Smart Grid Addressing Policy and Logistical Challenges It represents a unique public-private partnership of largely New York State utilities, authorities, universities, industrial companies, and institutions and research organizations which came together in a collaborative manner to facilitate the development of a Smart Grid in the state and nation. Smart Grid Consortium, Response of New York State Smart Grid Addressing Policy and Logistical Challenges More Documents & Publications SmartGrid Consortium: Smart Grid Roadmap for the State of New York Comments of DRSG to DOE Smart Grid RFI: Addressing Policy and Logistical

378

The Vermont-Sandia Smart Grid Partnership Powering the Future: The Vermont Smart Grid and Beyond  

E-Print Network (OSTI)

The Vermont-Sandia Smart Grid Partnership Powering the Future: The Vermont Smart Grid and Beyond BURLINGTON SHERATON HOTEL & CONFERENCE CENTER MAY Laboratories 9:10-10:15 a.m. Opening Plenary: The Vermont-Sandia Smart Grid

Hayden, Nancy J.

379

Grid Cellware: the first grid-enabled tool for modelling and simulating cellular processes  

Science Journals Connector (OSTI)

......currently available in Grid Cellware are as follows...Dormand Prince scheme. Hybrid algorithms flexible architecture...develop and evaluate hybrid algorithms. Such algorithm...Parameter estimation Grid Cellware incorporates...Cellware exploits grid infrastructure for running independent......

Pawan K. Dhar; Tan Chee Meng; Sandeep Somani; Li Ye; Kishore Sakharkar; Arun Krishnan; Azmi B.M. Ridwan; Sebastian Ho Kok Wah; Mandar Chitre; Zhu Hao

2005-04-01T23:59:59.000Z

380

Coupled Mesh Lagrangian/ALE Modeling:  

National Nuclear Security Administration (NNSA)

Coupled Mesh Lagrangian/ALE Modeling: Coupled Mesh Lagrangian/ALE Modeling: Opportunities and Challenges A. C. Robinson, * J. E. Bishop*, D. M. Hensinger, * T. E. Voth * M. K. Wong * * Sandia National Laboratories, New Mexico, 87185 We describe two methods for coupled mesh Lagrangian/ALE modeling where one mesh is treated as a Lagrangian mesh while the other is ALE. Lagrangian contact modeling is implemented in the first method to couple the two meshes. In the second method an overlapping grid algorithm that requires mapping of the information from one grid to another has been implemented. We review current experience with these two technologies. Introduction Lagrangian modeling is often preferred whenever the kinematics of the continuum flow permit because of its ability to precisely model discrete features which may be

Note: This page contains sample records for the topic "geodesic grid coupled" 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

A HYBRID SOLAR WIND MODEL OF THE CESE+HLL METHOD WITH A YIN-YANG OVERSET GRID AND AN AMR GRID  

SciTech Connect

A hybrid three-dimensional (3D) MHD model for solar wind study is proposed in the present paper with combined grid systems and solvers. The computational domain from the Sun to Earth space is decomposed into the near-Sun and off-Sun domains, which are respectively constructed with a Yin-Yang overset grid system and a Cartesian adaptive mesh refinement (AMR) grid system and coupled with a domain connection interface in the overlapping region between the near-Sun and off-Sun domains. The space-time conservation element and solution element method is used in the near-Sun domain, while the Harten-Lax-Leer method is employed in the off-Sun domain. The Yin-Yang overset grid can avoid well-known singularity and polar grid convergence problems and its body-fitting property helps achieve high-quality resolution near the solar surface. The block structured AMR Cartesian grid can automatically capture far-field plasma flow features, such as heliospheric current sheets and shock waves, and at the same time, it can save significant computational resources compared to the uniformly structured Cartesian grid. A numerical study of the solar wind structure for Carrington rotation 2069 shows that the newly developed hybrid MHD solar wind model successfully produces many realistic features of the background solar wind, in both the solar corona and interplanetary space, by comparisons with multiple solar and interplanetary observations.

Feng Xueshang; Zhang Shaohua; Xiang Changqing; Yang Liping; Jiang Chaowei [SIGMA Weather Group, State Key Laboratory for Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190 (China); Wu, S. T., E-mail: fengx@spaceweather.ac.cn [Center for Space Plasma and Aeronomic Research, University of Alabama in Huntsville, AL 35899 (United States)

2011-06-10T23:59:59.000Z

382

A Hybrid Solar Wind Model of the CESE+HLL Method with a Yin-Yang Overset Grid and an AMR Grid  

Science Journals Connector (OSTI)

A hybrid three-dimensional (3D) MHD model for solar wind study is proposed in the present paper with combined grid systems and solvers. The computational domain from the Sun to Earth space is decomposed into the near-Sun and off-Sun domains, which are respectively constructed with a Yin-Yang overset grid system and a Cartesian adaptive mesh refinement (AMR) grid system and coupled with a domain connection interface in the overlapping region between the near-Sun and off-Sun domains. The space-time conservation element and solution element method is used in the near-Sun domain, while the Harten-Lax-Leer method is employed in the off-Sun domain. The Yin-Yang overset grid can avoid well-known singularity and polar grid convergence problems and its body-fitting property helps achieve high-quality resolution near the solar surface. The block structured AMR Cartesian grid can automatically capture far-field plasma flow features, such as heliospheric current sheets and shock waves, and at the same time, it can save significant computational resources compared to the uniformly structured Cartesian grid. A numerical study of the solar wind structure for Carrington rotation 2069 shows that the newly developed hybrid MHD solar wind model successfully produces many realistic features of the background solar wind, in both the solar corona and interplanetary space, by comparisons with multiple solar and interplanetary observations.

Xueshang Feng; Shaohua Zhang; Changqing Xiang; Liping Yang; Chaowei Jiang; S. T. Wu

2011-01-01T23:59:59.000Z

383

Geodesic Transport Barriers in Jupiter's Atmosphere: A Video-Based Analysis  

E-Print Network (OSTI)

Jupiter's zonal jets and Great Red Spot are well known from still images. Yet the planet's atmosphere is highly unsteady, which suggests that the actual material transport barriers delineating its main features should be time-dependent. Rare video footages of Jupiter's clouds provide an opportunity to verify this expectation from optically reconstructed velocity fields. Available videos, however, provide short-time and temporally aperiodic velocity fields that defy classical dynamical systems analyses focused on asymptotic features. To this end, we use here the recent theory of geodesic transport barriers to uncover finite-time mixing barriers in the wind field extracted from a video captured by NASA's Cassini space mission. More broadly, the approach described here provides a systematic and frame-invariant way to extract dynamic coherent structures from time-resolved remote observations of unsteady continua.

Alireza Hadjighasem; George Haller

2014-08-24T23:59:59.000Z

384

A Class of Integrable Geodesic Flows on the Symplectic Group and the Symmetric Matrices  

E-Print Network (OSTI)

This paper shows that the left-invariant geodesic flow on the symplectic group relative to the Frobenius metric is an integrable system that is not contained in the Mishchenko-Fomenko class of rigid body metrics. This system may be expressed as a flow on symmetric matrices and is bi-Hamiltonian. This analysis is extended to cover flows on symmetric matrices when an isomorphism with the symplectic Lie algebra does not hold. The two Poisson structures associated with this system, including an analysis of its Casimirs, are completely analyzed. Since the system integrals are not generated by its Casimirs it is shown that the nature of integrability is fundamentally different from that exhibited in the Mischenko-Fomenko setting.

Anthony M. Bloch; Arieh Iserles; Jerrold E. Marsden; Tudor S. Ratiu

2006-04-19T23:59:59.000Z

385

Instrumentation, Controls, and Human-Machine Interface Technology Development Roadmap in Support of Grid Appropriate Reactors  

SciTech Connect

Grid Appropriate Reactors (GARs) are a component of the U.S. Department of Energy s (DOE s) Global Nuclear Energy Partnership (GNEP) program. GARs have smaller output power (<~600 MWe), than those intended for deployment on large, tightly coupled grids. This smaller size is important in avoiding grid destabilization, which can result from having a large fraction of a grid s electrical generation supplied by a single source. GARs are envisioned to be deployed worldwide often in locations without extensive nuclear power experience. DOE recently sponsored the creation of an Instrumentation, Controls, and Human-Machine Interface (ICHMI) technology development roadmap emphasizing the specific characteristics of GARs [1]. This roadmapping effort builds upon and focuses the recently developed, more general nuclear energy ICHMI technology development roadmap [2]. The combination of the smaller plant size, smaller grids, and deployment in locations without extensive prior nuclear power experience presents particular infrastructure, regulation, design, operational, and safeguards challenges for effective GAR deployment. ICHMI technologies are central to efficient GAR operation and as such are a dimension of each of these challenges. Further, while the particular ICHMI technologies to be developed would be useful at larger power plants, they are not high-priority development items at the larger plants. For example, grid transient resilience would be a useful feature for any reactor/grid combination and indeed would have limited some recent blackout events. However, most large reactors have limited passive cooling features. Large plants with active safety response features will likely preserve trip preferential grid transient response. This contrasts sharply with GARs featuring passive shutdown cooling, which can safely support grid stability during large grid transients. ICHMI technologies ranging from alternative control algorithms to simplified human-interface system designs are key to enabling GARs to respond properly and thereby stabilize the grid during transients.

Holcomb, David Eugene [ORNL] [ORNL; Upadhyaya, Belle R. [University of Tennessee, Knoxville (UTK)] [University of Tennessee, Knoxville (UTK); Kisner, Roger A [ORNL] [ORNL; O'Hara, John [Brookhaven National Laboratory (BNL)] [Brookhaven National Laboratory (BNL); Quinn, Edward L. [Longenecker & Associates] [Longenecker & Associates; Miller, Don W. [Ohio State University] [Ohio State University

2009-01-01T23:59:59.000Z

386

Geodesic dynamo chaotic flows and non-Anosov maps in twisted magnetic flux tubes  

E-Print Network (OSTI)

Recently Tang and Boozer [{\\textbf{Phys. Plasmas (2000)}}], have investigated the anisotropies in magnetic field dynamo evolution, from local Lyapunov exponents, giving rise to a metric tensor, in the Alfven twist in magnetic flux tubes (MFTs). Thiffeault and Boozer [\\textbf{Chaos}(2001)] have investigated the how the vanishing of Riemann curvature constrained the Lyapunov exponential stretching of chaotic flows. In this paper, Tang-Boozer-Thiffeault differential geometric framework is used to investigate effects of twisted magnetic flux tube filled with helical chaotic flows on the Riemann curvature tensor. When Frenet torsion is positive, the Riemann curvature is unstable, while the negative torsion induces an stability when time $t\\to{\\infty}$. This enhances the dynamo action inside the MFTs. The Riemann metric, depends on the radial random flows along the poloidal and toroidal directions. The Anosov flows has been applied by Arnold, Zeldovich, Ruzmaikin and Sokoloff [\\textbf{JETP (1982)}] to build a uniformly stretched dynamo flow solution, based on Arnold's Cat Map. It is easy to show that when the random radial flow vanishes, the magnetic field vanishes, since the exponential Lyapunov stretches vanishes. This is an example of the application of the Vishik's anti-fast dynamo theorem in the magnetic flux tubes. Geodesic flows of both Arnold and twisted MFT dynamos are investigated. It is shown that a constant random radial flow can be obtained from the geodesic equation. Throughout the paper one assumes, the reasonable plasma astrophysical hypothesis of the weak torsion. Pseudo-Anosov dynamo flows and maps have also been addressed by Gilbert [\\textbf{Proc Roy Soc A London (1993)}

Garcia de Andrade

2008-11-21T23:59:59.000Z

387

A NEW GHOST-NODE METHOD FOR LINKING DIFFERENT MODELS WITH VARIED GRID REFINEMENT  

SciTech Connect

A flexible, robust method for linking grids of locally refined models that may be constructed using different types of numerical methods is needed to address a variety of hydrologic problems. This work outlines and tests a new ghost-node model-linking method based on the iterative method of Mehl and Hill (2002, 2004). It is applicable to steady-state solutions for ground-water flow. Tests are presented for a homogeneous two-dimensional system that facilitates clear analysis of typical problems. The coupled grids are simulated using the finite-difference and finite-element models MODFLOW and FEHM. Results indicate that when the grids are matched spatially so that nodes and control volume boundaries are aligned, the new coupling technique has approximately twice the error as coupling using two MODFLOW models. When the grids are non-matching; model accuracy is slightly increased over matching grid cases. Overall, results indicate that the ghost-node technique is a viable means to accurately couple distinct models.

J. dickinson; S.C. James; S. Mehl; M.C. Hill; S. Leake; G.A. Zyvoloski

2005-10-18T23:59:59.000Z

388

NREL: Transmission Grid Integration - Publications  

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

Publications Publications Want updates about future transmission grid integration webinars and publications? Join our mailing list. NREL has an extensive collection of publications related to transmission integration research. Explore the resources below to learn more. Selected Project Publications Read selected publications related to these transmission integration projects: Western Wind and Solar Integration Study Eastern Renewable Generation Integration Study Oahu Wind Integration and Transmission Study Flexible Energy Scheduling Tool for Integration of Variable generation (FESTIV) Active power controls Forecasting Grid Simulation. NREL Publications Database NREL's publications database offers a variety of documents related to transmission integration that were written by NREL staff and

389

Convectively cooled electrical grid structure  

DOE Patents (OSTI)

Undesirable distortions of electrical grid conductors from thermal cycling are minimized and related problems such as unwanted thermionic emission and structural failure from overheating are avoided by providing for a flow of fluid coolant within each conductor. The conductors are secured at each end to separate flexible support elements which accommodate to individual longitudinal expansion and contraction of each conductor while resisting lateral displacements, the coolant flow preferably being directed into and out of each conductor through passages in the flexible support elements. The grid may have a modular or divided construction which facilitates manufacture and repairs.

Paterson, J.A.; Koehler, G.W.

1980-11-10T23:59:59.000Z

390

GENI: Grid Hardware and Software  

SciTech Connect

GENI Project: The 15 projects in ARPA-E’s GENI program, short for “Green Electricity Network Integration,” aim to modernize the way electricity is transmitted in the U.S. through advances in hardware and software for the electric grid. These advances will improve the efficiency and reliability of electricity transmission, increase the amount of renewable energy the grid can utilize, and provide energy suppliers and consumers with greater control over their power flows in order to better manage peak power demand and cost.

None

2012-01-09T23:59:59.000Z

391

Smart Grid Privacy Workshop Summary Report (January 2012) | Department...  

Energy Savers (EERE)

Smart Grid Privacy Workshop Summary Report (January 2012) Smart Grid Privacy Workshop Summary Report (January 2012) As smart grid deployments have increased throughout the United...

392

Comments of Ingersoll Rand on Smart Grid RFI | Department of...  

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

of Ingersoll Rand on Smart Grid RFI Comments of Ingersoll Rand on Smart Grid RFI Ingersoll Rand Comments on Smart Grid RFI: Addressing Policy and Logistical Challenges Ingersoll...

393

,"Projected Year Base","Year","Summer",,,"Eastern Power Grid...  

U.S. Energy Information Administration (EIA) Indexed Site

2009 " ,"(Megawatts and Percent)" ,"Projected Year Base","Year","Summer",,,"Eastern Power Grid",,,"Texas Power Grid",,,"Western Power Grid" ,,,"Contiguous...

394

,"Projected Year Base","Year","Summer",,,"Eastern Power Grid...  

U.S. Energy Information Administration (EIA) Indexed Site

2008 " ,"(Megawatts and Percent)" ,"Projected Year Base","Year","Summer",,,"Eastern Power Grid",,,"Texas Power Grid",,,"Western Power Grid" ,,,"Contiguous...

395

About Buildings-to-Grid Integration | Department of Energy  

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

Buildings-to-Grid About Buildings-to-Grid Integration About Buildings-to-Grid Integration As electricity demand continues to increase, integrating buildings and the electricity...

396

FermiGrid - experience and future plans  

SciTech Connect

Fermilab supports a scientific program that includes experiments and scientists located across the globe. In order to better serve this community, Fermilab has placed its production computer resources in a Campus Grid infrastructure called 'FermiGrid'. The FermiGrid infrastructure allows the large experiments at Fermilab to have priority access to their own resources, enables sharing of these resources in an opportunistic fashion, and movement of work (jobs, data) between the Campus Grid and National Grids such as Open Science Grid and the WLCG. FermiGrid resources support multiple Virtual Organizations (VOs), including VOs from the Open Science Grid (OSG), EGEE and the Worldwide LHC Computing Grid Collaboration (WLCG). Fermilab also makes leading contributions to the Open Science Grid in the areas of accounting, batch computing, grid security, job management, resource selection, site infrastructure, storage management, and VO services. Through the FermiGrid interfaces, authenticated and authorized VOs and individuals may access our core grid services, the 10,000+ Fermilab resident CPUs, near-petabyte (including CMS) online disk pools and the multi-petabyte Fermilab Mass Storage System. These core grid services include a site wide Globus gatekeeper, VO management services for several VOs, Fermilab site authorization services, grid user mapping services, as well as job accounting and monitoring, resource selection and data movement services. Access to these services is via standard and well-supported grid interfaces. We will report on the user experience of using the FermiGrid campus infrastructure interfaced to a national cyberinfrastructure--the successes and the problems.

Chadwick, K.; Berman, E.; Canal, P.; Hesselroth, T.; Garzoglio, G.; Levshina, T.; Sergeev, V.; Sfiligoi, I.; Timm, S.; Yocum, D.; /Fermilab

2007-09-01T23:59:59.000Z

397

A Guidebook on Grid Interconnection and Islanded Operation of Mini-Grid Power Systems Up to 200 kW  

E-Print Network (OSTI)

is connected to a power grid, the frequency is regulated bywith regional or national power grids calls for standardizedisland to the mainland power grid. The solar systems, which

Greacen, Chris

2014-01-01T23:59:59.000Z

398

A Guidebook on Grid Interconnection and Islanded Operation of Mini-Grid Power Systems Up to 200 kW  

E-Print Network (OSTI)

an isolated mini-grid, the renewable electricity generatorof an isolated mini-grid the renewable electricity generatoran isolated mini-grid, the renewable electricity generator

Greacen, Chris

2014-01-01T23:59:59.000Z

399

Building the TeraGrid  

Science Journals Connector (OSTI)

...took personal responsibility for identifying...Security in a Grid environment Keeping computer...system and the responsibility for resolving...software and services environment. CTSS is based...computing software environment. Funded by the...scientists and engineers to combine distributed...

2005-01-01T23:59:59.000Z

400

Grid Logging: Best Practices Guide  

SciTech Connect

The purpose of this document is to help developers of Grid middleware and application software generate log files that will be useful to Grid administrators, users, developers and Grid middleware itself. Currently, most of the currently generated log files are only useful to the author of the program. Good logging practices are instrumental to performance analysis, problem diagnosis, and security auditing tasks such as incident tracing and damage assessment. This document does not discuss the issue of a logging API. It is assumed that a standard log API such as syslog (C), log4j (Java), or logger (Python) is being used. Other custom logging API or even printf could be used. The key point is that the logs must contain the required information in the required format. At a high level of abstraction, the best practices for Grid logging are: (1) Consistently structured, typed, log events; (2) A standard high-resolution timestamp; (3) Use of logging levels and categories to separate logs by detail and purpose; (4) Consistent use of global and local identifiers; and (5) Use of some regular, newline-delimited ASCII text format. The rest of this document describes each of these recommendations in detail.

Tierney, Brian L; Tierney, Brian L; Gunter, Dan

2008-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Software & GRID Computing for LHC  

E-Print Network (OSTI)

Software & GRID Computing for LHC (Computing Work in a Big Group) Frederick Luehring luehring: ­ A short introduction about the LHC and ATLAS · LHC/ATLAS serves as an example of large scale scientific/P609 Presentation F. Luehring Pg. 3 #12;A Little About LHC & ATLAS February 10, 2011 P410/P609

Evans, Hal

402

Advanced Grid Integration (AGI) | Department of Energy  

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

Advanced Grid Integration (AGI) Advanced Grid Integration (AGI) Advanced Grid Integration (AGI) The Advanced Grid Integration (AGI) Division leads the federal government's efforts to accelerate modernization of the U.S. electric power grid. By enabling the two-way flow of electricity and information, a Smart Grid will increase the reliability, efficiency, and security of electric transmission, distribution, and use. A modern grid provides the foundation for a strong economy by enabling the integration of clean, renewable energy sources like wind and solar power and supporting the needs of an increasingly digital economy. AGI leverages energy industry cost-share and collaboration to foster the deployment of smart grid technologies and systems and reduce barriers to investment. To accomplish this, the Program is pursuing five core

403

Piloting the Smart Grid | Open Energy Information  

Open Energy Info (EERE)

Piloting the Smart Grid Piloting the Smart Grid Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Piloting the Smart Grid Focus Area: Crosscutting Topics: Best Practices Website: www.smartgridnews.com/artman/uploads/1/Piloting_the_smart_grid__05-29- Equivalent URI: cleanenergysolutions.org/content/piloting-smart-grid Language: English Policies: "Deployment Programs,Regulations,Financial Incentives" is not in the list of possible values (Deployment Programs, Financial Incentives, Regulations) for this property. DeploymentPrograms: Demonstration & Implementation Regulations: Cost Recovery/Allocation This paper provides guidance regarding when and how Smart Grid piloting studies should be conducted along with examples from several recent pilots that involved dynamic pricing, a key element of the smart grid. Smart Grid

404

eGrid | OpenEI  

Open Energy Info (EERE)

eGrid eGrid Dataset Summary Description Datasets are for the US electricity grid system for eGrid regions (AKGD, AKMS, AZNM, CAMX, ERCT, FRCC, HIMS, HIOA, MROE, MROW, NEWE, NWPP, NYCW, NYLI, NYUP, RFCE, RFCM, RFCW, RMPA, SPNO, SPSO, SRMV, SRMW, SRSO, SRTV, SRVC) for 2008. The data is provided in life cycle inventory forms (xls and xml) . A module report and a detailed spreadsheet are also included.Datasets include generation and transmission of electricity for each of the eGrid regions. It is representative of the year 2008 mix of fuels used for utility generations for each of the eGrid regions Source USLCI Database Date Released Unknown Date Updated Unknown Keywords eGrid Electricity grid LCI life cycle inventory US Data application/zip icon egrid_electricity_lci_datasets_2008.zip (zip, 7 MiB)

405

Principal Characteristics of a Modern Grid  

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

Joe Miller - Modern Grid Team Joe Miller - Modern Grid Team October 6, 2008 1 Conducted by the National Energy Technology Laboratory Funded by the U.S. Department of Energy, Office of Electricity Delivery and Energy Reliability Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y 2 Agenda The Smart Grid - a refresher "Push" drivers - a case for action "Pull" drivers - Smart Grid opportunities Some Smart Grid impacts Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y 3 What is the role of the MGS? Define a vision for the Modern Grid Reach out to stakeholders for input Assist in the identification of benefits and barriers Facilitate resolution of issues Promote testing of integrated suites of technologies

406

What is the Smart Grid Anyway  

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

SM SM So What IS The Smart Grid Anyway? Jim Kelly SCE Senior Vice President, Transmission & Distribution What is the Smart Grid? EDISON INTERNATIONAL® What Is A "Smart Grid?" SM * There are dozens of national and international initiatives directed toward a "smarter" grid - and many are narrow directed toward a smarter grid and many are narrow, focused largely upon the interests of the sponsor * SCE takes an expansive SCE takes an expansive, inclusive view of the Smart * inclusive view of the Smart Grid - In our view, an advanced grid that doesn't better serve customers is Showmanship not Smart! customers is Showmanship, not Smart! * A true Smart Grid will integrate advanced intelligence from the customer to the generator - and everywhere in

407

Solving anisotropic transport equation on misaligned grids  

Science Journals Connector (OSTI)

Triangular 3rd order Lagrange elements have been implemented previously to study the numerical error associated with grid misalignment. It has previously been found that grid misalignment strongly affects numerical accuracy in the case of linear elements. ...

J. Chen; S. C. Jardin; H. R. Strauss

2005-05-01T23:59:59.000Z

408

Power line communications for smart grid applications  

Science Journals Connector (OSTI)

Power line communication, that is, using the electricity infrastructure for data transmission, is experiencing a renaissance in the context of Smart Grid. Smart Grid objectives include the integration of intermittent renewable energy sources into the ...

Lars Torsten Berger; Andreas Schwager; J. Joaquín Escudero-Garzás

2013-01-01T23:59:59.000Z

409

Energy Department Releases Grid Energy Storage Report  

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

The Energy Department released its Grid Energy Storage report to the members of the U.S. Senate Energy and Natural Resources Committee, identifying the benefits and challenges of grid energy storage that must be addressed to enable broader use.

410

A parallel programming environment on grid  

Science Journals Connector (OSTI)

Computational grids are environment that provides the ability to exploit diverse, geographically distributed resources. Bulk Synchronous Parallel (BSP) model is a widely used parallel programming model. With rapid development of grid technologies, users ...

Weiqin Tong; Jingbo Ding; Lizhi Cai

2003-06-01T23:59:59.000Z

411

HPC on the Grid: The Theophys Experience  

Science Journals Connector (OSTI)

The Grid Virtual Organization (VO) “Theophys”, associated ... , spreading from serial, SMP, MPI and hybrid jobs. That has led, in the ... 20 years, towards the use of the Grid infrastructure for serial jobs, whil...

Roberto Alfieri; Silvia Arezzini; Alberto Ciampa…

2013-06-01T23:59:59.000Z

412

Cybersecurity and the Smarter Grid (2014)  

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

An article by OE’s Carol Hawk and Akhlesh Kaushiva in The Electricity Journal discusses cybersecurity for the power grid and how DOE and the energy sector are partnering to keep the smart grid reliable and secure.

413

Assistant Secretary Hoffman Discusses Grid Modernization with...  

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

Assistant Secretary Hoffman Discusses Grid Modernization with the New York Times and E&E TV Assistant Secretary Hoffman Discusses Grid Modernization with the New York Times and E&E...

414

GIVS: Integrity Validation for Grid Security  

Science Journals Connector (OSTI)

In this paper we address the problem of granting the correctness of Grid computations. We introduce a Grid Integrity Validation Scheme (GIVS) that may reveal the presence of malicious hosts by statistical samp...

Giuliano Casale; Stefano Zanero

2005-01-01T23:59:59.000Z

415

A framework model for grid security  

Science Journals Connector (OSTI)

Computational grids can be considered as tiered objects; following a widespread terminology, cluster grids may be grouped into enterprise grids, that in turn may belong to global grids. Therefore, computing grid security has to be “tiered” too, with the ground level remaining the OS one. In this work, we introduce a sort of unified approach, an overall architectural framework for access control to grid resources, and one that adheres as much as possible to current security principles. Current grid security implementations are viewed in the light of this model, their main drawbacks are described, and we show how our proposal is able to avoid them. We believe that a main strategy could be to adopt both PKI and PMI infrastructures at the grid layer, ensuring that an adequate transfer of authentication and authorization will be made between the Virtual Organization and Resource Provider layers. This can be achieved by extending those features at the OS layer as system applications and services.

G. Laccetti; G. Schmid

2007-01-01T23:59:59.000Z

416

Security Issues of Grid Resource Management  

Science Journals Connector (OSTI)

Secure management of Grid resources presents many challenges. This chapter will examine the security requirements that are essential to Grids and some of the software that is ... them. We will discuss how well th...

Mary R. Thompson; Keith R. Jackson

2004-01-01T23:59:59.000Z

417

Security and Certification Issues in Grid Computing  

Science Journals Connector (OSTI)

Grid computing is concerned with the sharing and ... “virtual organizations.” The dynamic nature of Grid environments introduces challenging security concerns that demand new technical approaches. In this brief o...

Ian Foster; Frank Siebenlist; Steven Tuecke…

2003-01-01T23:59:59.000Z

418

Innovations for Grid Security from Trusted Computing  

Science Journals Connector (OSTI)

A central problem for Grid (or web) services is how to ... or system) will behave as expected. In Grid security practice at present, issues of confidentiality and ... insufficient for a large class of problems in...

Wenbo Mao; Andrew Martin; Hai Jin; Huanguo Zhang

2009-01-01T23:59:59.000Z

419

Future of Smart Grid Communication Networks  

Science Journals Connector (OSTI)

We observed in Chap. 1 that Smart Grid is an evolution of the electric power ... no one single acceptable and concise definition of Smart Grid, it is best described by i...

Kenneth C. Budka; Jayant G. Deshpande…

2014-01-01T23:59:59.000Z

420

INFOGRAPHIC: Understanding the Grid | Department of Energy  

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

the Grid November 17, 2014 - 2:05pm Addthis Our GridWeek infographic shows how electricity is generated, transmitted and distributed for use in our homes. | Graphic by

Note: This page contains sample records for the topic "geodesic grid coupled" 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.


421

Past and future of grid shell structures  

E-Print Network (OSTI)

Because of their original organic shape and the column free space that they provide, the design of grid shell structures challenges architects and structural engineers in more than one way. Very few grid shell building ...

Paoli, Céline (Céline Aude)

2007-01-01T23:59:59.000Z

422

State Estimation of the Micro-grid  

Science Journals Connector (OSTI)

For the goal of actual needs of power companies, this chapter develops a state estimation procedure of the micro-grid, using branch currents as state variables, ... In this chapter, an IEEE-33 nodes micro-grid is...

Jinling Lu; Guodong Zhu; Yuyang Miao

2014-01-01T23:59:59.000Z

423

Helix coupling  

DOE Patents (OSTI)

A coupling for connecting helix members in series, which consists of a pair of U-shaped elements, one of which is attached to each helix end with the U sections of the elements interlocked. The coupling is particularly beneficial for interconnecting helical Nitinol elements utilized in thermal actuators or engines. Each coupling half is attached to the associated helix at two points, thereby providing axial load while being easily removed from the helix, and reusable.

Ginell, W.S.

1982-03-17T23:59:59.000Z

424

FACT SHEET: INTERNATIONAL SMART GRID ACTION NETWORK  

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

Updated on July 23, 2010 Updated on July 23, 2010 1 FACT SHEET: INTERNATIONAL SMART GRID ACTION NETWORK At the Clean Energy Ministerial in Washington, D.C. on July 19 th and 20 th , ministers launched an International Smart Grid Action Network (ISGAN) to accelerate the development and deployment of smart electricity grids around the world. Smart grid will help the world accelerate its transition to clean energy and capture the associated energy- and

425

Sandia National Laboratories: modernize the electric grid  

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

Energy Assurance, Energy Storage, Energy Storage Systems, Energy Surety, Grid Integration, Infrastructure Security, Microgrid, Modeling & Analysis, News, News & Events,...

426

Sandia National Laboratories: Transmission Grid Integration  

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

output profiles and forecasts to support solar integration studies. Tagged with: Energy * Grid Integration * photovoltaic * Photovoltaics * PV * Renewable Energy *...

427

Utilization of Modified CoreGRID Ontology in an Agent-based Grid Resource Management System  

E-Print Network (OSTI)

-driven, and initially was based on an in-house developed mini-ontology of the Grid. Our re- cent analysis has indicatedUtilization of Modified CoreGRID Ontology in an Agent-based Grid Resource Management System M, Morocco Abstract The Agents in Grid project is devoted to the de- velopment of an agent-based intelligent

Paris-Sud XI, Université de

428

Honeywell Parallon Grid-connect Tests Honeywell Grid-connect Tests  

E-Print Network (OSTI)

Appendix C Honeywell Parallon Grid-connect Tests 12/20/2000 #12;Honeywell Grid-connect Tests 12 power Engine Speed Figure C-1: Ramp Down Tests ­ Power and Shaft Speed ­ 15 kW Steps #12;Honeywell Grid Figure C-2: Ramp Down Tests ­ Power and Turbine Exit Temperature ­ 15 kW Steps #12;Honeywell Grid

429

Modeling and Grid impedance Variation Analysis of Parallel Connected Grid Connected Inverter  

E-Print Network (OSTI)

Modeling and Grid impedance Variation Analysis of Parallel Connected Grid Connected Inverter based - This paper addresses the harmonic compensation error problem existing with parallel connected inverter grid connected inverter, it is found that multiple parallel connected inverters and grid impedance can

Bak, Claus Leth

430

Teaching the Grid: Learning Distributed Computing with the M-grid Framework  

E-Print Network (OSTI)

. This situation arises in a number of different scenarios, including Grid computing which is a secure, service how to use as real Grid software requires extensive setting up and complex security processes. M-grid it is executed. Established Grid systems have extensive security infrastructures associated with them

Walters, Robert

431

What is a Grid? Grid Today, AUGUST 12, 2002: VOL. 1 NO. 9  

E-Print Network (OSTI)

) · authentication, delegation, and secure communication (the basic Grid security services) · identity certificateWhat is a Grid? Grid Today, AUGUST 12, 2002: VOL. 1 NO. 9 (http://www.gridtoday.com/02/0812/020812.html) I would like to provide perspective on the question of what is a Grid - a perspective derived

432

The GridPACK™ toolkit for developing power grid simulations on high performance computing platforms  

Science Journals Connector (OSTI)

This paper describes the GridPACK™ framework, which is designed to help power grid engineers develop modeling software capable of running on high performance computers. The framework contains modules for setting up distributed power grid networks, ... Keywords: electric power grid, high performance computing, software frameworks

Bruce Palmer; William Perkins; Kevin Glass; Yousu Chen; Shuangshuang Jin; David Callahan

2013-11-01T23:59:59.000Z

433

SMART WATER GRID PLAN B TECHNICAL REPORT  

E-Print Network (OSTI)

SMART WATER GRID PLAN B TECHNICAL REPORT FALL 2014 PREPARED BY: OLGA MARTYUSHEVA IN PARTIAL demand linked to the global population increase. A Smart Water Grid (SWG) is a two-way real time network, and others. A review of the benefits of Smart Water Grids is presented in the context of water conservation

Julien, Pierre Y.

434

Chapter 3 - Hacking the Smart Grid  

Science Journals Connector (OSTI)

Abstract This chapter describes the potential methods and motives behind an attack on the Smart Grid. Knowing who might attack the grid and how they might proceed is imperative for understanding how to defend it. Since the Smart Grid is such an important infrastructure component, this understanding is vital to its proper implementation and continued operation.

Eric D. Knapp; Raj Samani

2013-01-01T23:59:59.000Z

435

ONTHEINTEGRATIONOFPASSIVEANDACTIVE NETWORK MONITORING IN GRID SYSTEMS  

E-Print Network (OSTI)

activity. Monitoring the network infrastructure of a Grid has a vital role in the man- agementONTHEINTEGRATIONOFPASSIVEANDACTIVE NETWORK MONITORING IN GRID SYSTEMS Sergio Andreozzi, Augusto.trimintzios@enisa.eu.int Abstract This paper focuses on the integration of passive and active network monitoring techniques in Grid

Markatos, Evangelos P.

436

Earth resistivity measurement near substation ground grids  

SciTech Connect

Proper substation grounding grid design requires good, accurate soil resistivity measurements. This data is essential to model the substation ground grid to design a safe ground grid with a satisfactory ground grid resistance at minimum cost. For substations with several decades of service, there is some concern that a grid may have deteriorated, been damaged during equipment installation or excavation, or that initial soil resistivity measurements were lost or may not have been correctly performed. Ground grid conductors change the substation surface voltage distribution. Any voltage measurements taken at the complete substation will also vary from the tests made without conductors present. During testing, current was injected in the soil by probes placed near the ground grid. The current tends to follow the ground grid conductors since copper is a far better conductor than the soil it is placed in. Resistance readings near grids will be lower than readings in undisturbed soil. Since computer models were unavailable for many years, analyzing the effect of the grid conductors on soil resistivity measurements was very difficult. As a result, soil resistivity measurements made close to substations were of little use to the engineer unless some means of correcting the measured values could be developed. This paper will present results of soil resistivity measurements near a substation ground grid before and after a ground grid has been installed and describes a means of calculating the undisturbed soil model.

Lodwig, S.G.; Mateja, S.A. [ComEd, Chicago, IL (United States)

1996-11-01T23:59:59.000Z

437

Grid watch: mapping blackouts with smart phones  

Science Journals Connector (OSTI)

The power grid is one of humanity's most significant engineering undertakings and it is essential in developed and developing nations alike. Currently, transparency into the power grid relies on utility companies and more fine-grained insight is provided ... Keywords: crowdsourcing, power monitoring, side channel information, smart grid, smartphone applications

Noah Klugman; Javier Rosa; Pat Pannuto; Matthew Podolsky; William Huang; Prabal Dutta

2014-02-01T23:59:59.000Z

438

Grid Security: Expecting the Mingchao Ma  

E-Print Network (OSTI)

Grid Security: Expecting the Unexpected Mingchao Ma STFC � Rutherford Appleton Laboratory, UK #12;Slide 2 Overview � Security Service Challenges (SSC) Review � Grid Security Incident � What had happened of the LCG/EGEE Grid Sites (Dec 2008) http://www.gridpp.ac.uk/security/ssc/ https

University College London

439

Security for Grid Services Frank Siebenlist2  

E-Print Network (OSTI)

Security for Grid Services Von Welch1 Frank Siebenlist2 Ian Foster1,2 John Bresnahan2 Karl organizations. #12;Grid computing research has produced security technologies based not on direct-API [23]. The Grid Security Infrastructure (GSI) is the name given to the portion of the Globus Toolkit

Wiseman, Yair

440

Editorial: Green Energy Management and Smart Grid  

Science Journals Connector (OSTI)

......Editorial: Green Energy Management and Smart Grid Zhangbing Zhou 1 5 * Huansheng Ning...and managing energy resources, and smart grid is emerging as the next generation...Toward the green energy management and smart grid, there are several open issues to......

Zhangbing Zhou; Huansheng Ning; Meikang Qiu; Habib F. Rashvand

2014-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "geodesic grid coupled" 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

February 2002 Grid Scale Oscillations in MICOM  

E-Print Network (OSTI)

are the implications of the grid scale oscillation on ­ Surface Fluxes that drive THC ­ Heat transport ­ MeridionalFebruary 2002 Grid Scale Oscillations in MICOM Balasubramanya T. Nadiga Los Alamos National Model · 3o displaced pole grid. 16 layers · Kraus-Turner Bulk Mixed Layer · Explicit diapycnal

Nadiga, Balasubramanya T. "Balu"

442

Fuzzy Trust Integration for Security Enforcement in Grid Computing  

Science Journals Connector (OSTI)

How to build the mutual trust among Grid resources sites is crucial to secure distributed Grid applications. We suggest enhancing the trust index...fuzzy-logic trust model for securing Grid resources. Grid security

Shanshan Song; Kai Hwang; Mikin Macwan

2004-01-01T23:59:59.000Z

443

An Integrated XML Security Mechanism for Mobile Grid Application  

Science Journals Connector (OSTI)

Mobile Grid, or Wireless Grid Services refers to value-added Grid Service by processing in Mobile environment. Besides ... a conceptual shift from Client-Server model to Grid and Peer-to-Peer computing models. As...

Kiyoung Moon; Namje Park; Jongsu Jang…

2004-01-01T23:59:59.000Z

444

Research on Security Architecture and Protocols of Grid Computing System  

Science Journals Connector (OSTI)

This paper analyzes security problems existing in Grid Computing System and describes the security mechanism in Grid Computing System. After briefly introducing the security abstract of grid computing system at Grid

Xiangming Fang; Shoubao Yang; Leitao Guo; Lei Zhang

2004-01-01T23:59:59.000Z

445

XML-Based Security Acceleration Methods Supporting Fast Mobile Grid  

Science Journals Connector (OSTI)

Mobile grid, or wireless grid services refers to value-added grid service by processing in mobile environment. Besides ... a conceptual shift from client-server model to grid and peer-to-peer computing models. As...

Namje Park; Kiyoung Moon; Howon Kim; Seungjoo Kim…

2005-01-01T23:59:59.000Z

446

Rethinking the Future Grid: Integrated Nuclear Renewable Energy Systems: Preprint  

SciTech Connect

The U.S. DOE is supporting research and development that could lead to more efficient utilization of clean energy generation sources, including renewable and nuclear options, to meet both grid demand and thermal energy needs in the industrial sector. One concept under consideration by the DOE-NE and DOE-EERE is tighter coupling of nuclear and renewable energy sources in a manner that better optimizes energy use for the combined electricity, industrial manufacturing, and transportation sectors. This integration concept has been referred to as a 'hybrid system' that is capable of apportioning thermal and electrical energy to first meet the grid demand (with appropriate power conversion systems), then utilizing excess thermal and, in some cases, electrical energy to drive a process that results in an additional product.

Bragg-Sitton, S. M.; Boardman, R.; Ruth, M.; Zinaman, O.; Forsberg, C.

2015-01-01T23:59:59.000Z

447

Fact Sheet: Community Energy Storage for Grid Support (October 2012)  

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

Detroit Edison Detroit Edison American Recovery and Reinvestment Act (ARRA) Community Energy Storage for Grid Support Demonstrating advanced implementation of community energy storage technologies for grid support Detroit Edison (DTE) will design, build, and demonstrate Community Energy Storage (CES) systems in their service territory, and two of the CES units will utilize secondary- use electric vehicle batteries. The CES system will use a number of battery energy storage units utilizing lithium batteries with the required electronics and energy conditioning devices to locate backup power near to the customer. The energy storage system consists of 20 separate 25 kW (50 kWh) CES units and a 500 kW lithium battery storage device integrated with a photovoltaic solar module. At just under 1 MW the CES units, coupled

448

Smart Grid Consortium, Response of New York State Smart Grid Addressing  

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

Consortium, Response of New York State Smart Grid Consortium, Response of New York State Smart Grid Addressing Policy and Logistical Challenges Smart Grid Consortium, Response of New York State Smart Grid Addressing Policy and Logistical Challenges It represents a unique public-private partnership of largely New York State utilities, authorities, universities, industrial companies, and institutions and research organizations which came together in a collaborative manner to facilitate the development of a Smart Grid in the state and nation. Smart Grid Consortium, Response of New York State Smart Grid Addressing Policy and Logistical Challenges More Documents & Publications SmartGrid Consortium: Smart Grid Roadmap for the State of New York New York Independent System Operator, Smart Grid RFI: Addressing Policy and

449

Smart Grid Week: New Project in Oregon Helping Advance the Grid of the  

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

Smart Grid Week: New Project in Oregon Helping Advance the Grid of Smart Grid Week: New Project in Oregon Helping Advance the Grid of the Future Smart Grid Week: New Project in Oregon Helping Advance the Grid of the Future June 7, 2013 - 2:07pm Addthis Rows of battery racks at Portland General Electric’s Salem Smart Power Center in Salem, Ore. PGE is a participant in the Battelle-led Pacific Northwest Smart Grid Demonstration Project, which will use the center’s 5-megawatt energy storage system to test several smart grid technologies and approaches. | Photo courtesy of Portland General Electric. Rows of battery racks at Portland General Electric's Salem Smart Power Center in Salem, Ore. PGE is a participant in the Battelle-led Pacific Northwest Smart Grid Demonstration Project, which will use the center's 5-megawatt energy storage system to test several smart grid technologies

450

Unruh-DeWitt detector response along static and circular geodesic trajectories for Schwarzschild-AdS black holes  

E-Print Network (OSTI)

We present novel methods to numerically address the problem of characterizing the response of particle detectors in curved spacetimes. These methods allow for the integration of the Wightman function, at least in principle, in rather general backgrounds. In particular we will use this tool to further understand the nature of conformal massless scalar Hawking radiation from a Schwarzschild black hole in anti-de Sitter space. We do that by studying an Unruh-DeWitt detector at rest above the horizon and in circular geodesic orbit. The method allows us to see that the response rate shows peaks at certain characteristic frequencies, which correspond to the quasinormal modes (QNMs) of the space-time. It is in principle possible to apply these techniques to more complicated and interesting physical scenarios, e.g. geodesic infall or multiple detector entanglement evolution, or the study of the behaviour of quantum correlations in spacetimes with black hole horizons.

Keith K. Ng; Lee Hodgkinson; Jorma Louko; Robert B. Mann; Eduardo Martin-Martinez

2014-09-15T23:59:59.000Z

451

Circular geodesics of Bardeen and Ayon-Beato-Garcia regular black-hole and no-horizon spacetimes  

E-Print Network (OSTI)

We study circular geodesic motion of test particles and photons in the Bardeen and Ayon-Beato-Garcia (ABG) geometry describing spherically symmetric regular black-hole or no-horizon spacetimes. While the Bardeen geometry is not exact solution of Einstein's equations, the ABG spacetime is related to self-gravitating charged sources governed by Einstein's gravity and non-linear electrodynamics. They both are characterized by the mass parameter $m$ and the charge parameter $g$. We demonstrate that in similarity to the Reissner-Nordstrom (RN) naked singularity spacetimes an antigravity static sphere should exist in all the no-horizon Bardeen and ABG solutions that can be sorrounded by a Keplerian accretion disc. However, contrary to the RN naked singularity spacetimes, the ABG no-horizon spacetimes with parameter $g/m > 2$ can contain also an additional inner Keplerian disc hidden under the static antigravity sphere. Properties of the geodesic structure are reflected by simple observationally relevant optical phe...

Stuchlik, Zdenek

2015-01-01T23:59:59.000Z

452

New Report Characterizes Existing Offshore Wind Grid Interconnection...  

Office of Environmental Management (EM)

New Report Characterizes Existing Offshore Wind Grid Interconnection Capabilities New Report Characterizes Existing Offshore Wind Grid Interconnection Capabilities September 3,...

453

Modeling Electric Vehicle Benefits Connected to Smart Grids  

E-Print Network (OSTI)

Vehicle Benefits Connected to Smart Grids M. Stadler 1,2,a ,Electric Vehicle Benefits Connected to Smart Grids Michael

Stadler, Michael

2012-01-01T23:59:59.000Z

454

Quantifying The Complexity Of Geodesic Paths On Curved Statistical Manifolds Through Information Geometric Entropies and Jacobi Fields  

E-Print Network (OSTI)

We characterize the complexity of geodesic paths on a curved statistical manifold M_{s} through the asymptotic computation of the information geometric complexity V_{M_{s}} and the Jacobi vector field intensity J_{M_{s}}. The manifold M_{s} is a 2l-dimensional Gaussian model reproduced by an appropriate embedding in a larger 4l-dimensional Gaussian manifold and endowed with a Fisher-Rao information metric g_{{\\mu}{\

Carlo Cafaro; Stefano Mancini

2010-11-25T23:59:59.000Z

455

A Guidebook on Grid Interconnection and Islanded Operation of Mini-Grid Power Systems Up to 200 kW  

E-Print Network (OSTI)

grid connection of PV hybrid mini-grids. IEA PVPS Task 11,Program (ESMAP), “Mini-Grid Design Manual,” Technical Paperhttp://www.riaed.net/IMG/pdf/Mini- Grid_Design_Manual-2.pdf

Greacen, Chris

2014-01-01T23:59:59.000Z

456

BEAM COUPLING PHENOMENA IN FAST KICKER SYSTEMS.  

SciTech Connect

Beam coupling phenomena have been observed in most fast kicker systems through out Brookhaven Collider-Accelerator complex. With ever-higher beam intensity, the signature of the beam becomes increasingly recognizable. The beam coupling at high intensity produced additional heat dissipation in high voltage modulator, thyratron grids, thyratron driver circuit sufficient to damage some components, and causes trigger instability. In this paper, we will present our observations, basic coupling mode analysis, relevance to the magnet structures, issues related to the existing high voltage modulators, and considerations of the future design of the fast kicker systems.

ZHANG,W.; AHRENS,L.A.; GLENN,J.; SANDBERG,J.; TSOUPAS,N.

2001-06-18T23:59:59.000Z

457

A new mechanism for resource monitoring in Grid computing  

Science Journals Connector (OSTI)

Grid computing is a technology for distributed computing. To manage a large scale of Grid resources for dynamic access, resource management is a key component. In this paper, a Grid Resource Information Monitoring (GRIM) prototype is introduced. To support ... Keywords: Grid Resource Information Monitoring, Grid Resource Information Retrieving, Grid computing, Resource management

Wu-Chun Chung; Ruay-Shiung Chang

2009-01-01T23:59:59.000Z

458

A portal for visualizing grid usage.  

SciTech Connect

We introduce a framework for measuring the use of Grid services and exposing simple summary data to an authorized set of Grid users through a JSR168-enabled portal. The sensor framework has been integrated into the Globus Toolkit and allows Grid administrators to have access to a mechanism helping with report and usage statistics. Although the original focus was the reporting of actions in relationship to GridFTP services, the usage service has been expanded to report also on the use of other Grid services.

von Laszewski, G.; DiCarlo, J.; Allcock, B.; Mathematics and Computer Science; Univ. of Chicago

2007-08-25T23:59:59.000Z

459

NREL: Transmission Grid Integration - Webinars  

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

Webinars Webinars Want updates about future transmission grid integration webinars and publications? Join our mailing list. NREL periodically offers webinars on transmission grid integration topics to provide insight into its research. Explore the resources below to learn more. Upcoming Webinars Please check back. Details on future meetings and workshops will be posted as they are available. Past Webinars Results from The Western Wind and Solar Integration Study Phase 2: An examination of how wind and solar power affect operations, costs, and emissions from fossil-fueled generators Wednesday, September 25, 2013 at 12:00 EDT (10:00 MDT) The Western Wind and Solar Integration Study Phase 2 (WWSIS-2), launched in 2011, examines the potential impacts of up to 33% wind and solar energy

460

National Grid Energy Efficiency Plans  

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

Grid's Energy Efficiency Programs Grid's Energy Efficiency Programs FUPWG Presentation Frederick McKiernan April 14, 2010 2  Commercial New Construction  Large Commercial Retrofit  Small Business Direct Installation  Engineering and Other Services C&I Energy Efficiency Programs 3 Incentive Structure  Incentive offering for electric and gas measures varies  Prescriptive approach - based on a per unit-basis (fixed)  Custom approach - based on the unique energy savings and cost criteria of a project  Comprehensive approach - based on the evaluation of the whole building; and - based on the benefits from examining an integrated engineering approach (for multiple measures) 4  Focuses on direct install of retrofit lighting, energy management systems, refrigeration, and prescriptive gas measures

Note: This page contains sample records for the topic "geodesic grid coupled" 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

Grid Applications for Energy Storage  

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

Applications for Energy Storage Applications for Energy Storage Flow Cells for Energy Storage Workshop Washington DC 7-8 March 2012 Joe Eto jheto@lbl.gov (510) 486-7284 Referencing a Recent Sandia Study,* This Talk Will: Describe and illustrate selected grid applications for energy storage Time-of-use energy cost management Demand charge management Load following Area Regulation Renewables energy time shift Renewables capacity firming Compare Sandia's estimates of the economic value of these applications to the Electricity Storage Association's estimates of the capital costs of energy storage technologies *Eyer, J. and G. Corey. Energy Storage for the Electricity Grid: Benefits and Market Potential Assessment Guide. February 2010. SAND2010-0815 A Recent Sandia Study Estimates the Economic

462

Environmental Impacts of Smart Grid  

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

Environmental Impacts of Smart Grid Environmental Impacts of Smart Grid January 10, 2011 DOE/NETL-2010/1428 Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or

463

Commercially Valuable Smart Grid Data  

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

February 4, 2010 1 February 4, 2010 1 Commercially Valuable Smart Grid Data Commercially Valuable Smart Grid Data Question: What is the Department of Energy's (DOE's) approach for ensuring confidentiality of information that contains confidential and/or proprietary information that recipients are required to submit in carrying out their Metrics and Benefits Reporting Plan obligations? Answer: DOE does not anticipate requiring delivery of any "proprietary" information, i.e., confidential information developed at private expense outside the DOE grant. For data developed under a SGIG grant, DOE has the right to obtain and publish such data. However, certain "commercially valuable data" as set forth in more detail below, may be protected from publication.

464

Grid Net | Open Energy Information  

Open Energy Info (EERE)

Net Net Jump to: navigation, search Name Grid Net Address 340 Brannan St Place San Francisco, California Zip 94107 Sector Efficiency Product Sells open, interoperable, policy-based network management software Website http://www.grid-net.com/ Coordinates 37.781265°, -122.393229° 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":37.781265,"lon":-122.393229,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

465

Buildings to Grid Integration | Department of Energy  

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

Buildings to Grid Integration Buildings to Grid Integration Buildings to Grid Integration The U.S. Department of Energy is coordinating strategies and activities with companies, individuals, and government entities to address the integration and optimization of buildings with the nation's energy grid. Buildings and the Energy Grid As electricity demand continues to increase, integrating buildings and the electricity grid is a key step to increasing energy efficiency. Intermittent and/or variable generation sources and loads, such as those of electric vehicles, are being installed on the grid in increasing numbers and at more distributed locations. For example, the U.S. government, many states, municipalities, and utility service areas are diversifying and distributing their generation mix, including a larger percentage of

466

About the Smart Grid | Open Energy Information  

Open Energy Info (EERE)

About the Smart Grid About the Smart Grid Jump to: navigation, search US Recovery Act Smart Grid Investment Grant Awards The US Department of Energy Office of Electricity Delivery and Energy Reliability (OE) was allotted Recovery Act funding for investment in a nationwide plan to modernize the electric grid, enhance security of U.S. energy infrastructure and ensure reliable electricity delivery to meet growing demand. The funds will support implementation of the Smart Grid programs including technology research, development and demonstration projects, and the federal matching fund for Smart Grid technologies, with funds distributed through a competitive grant process. [1] Below is a map showing the total Smart Grid Investment Grant funding which impacts each state (some projects affect multiple states).

467

PNNL GridWise | Open Energy Information  

Open Energy Info (EERE)

GridWise GridWise (Redirected from GridWise) Jump to: navigation, search Logo: GridWise Name GridWise Agency/Company /Organization Pacific Northwest National Laboratory Sector Energy Resource Type Case studies/examples Website http://gridwise.pnl.gov/ Country United States Northern America References Gridwise Vision[1] Contents 1 Overview 2 Highlights 3 Notes 4 References Overview This is a case study of two year-long demonstration projects that tested demand-response concepts. The Grid Friendly Appliance Project demonstrated how household appliances can reduce energy consumption at critical moments when they are fitted with controllers that sense stress on the grid. The Olympic Peninsula Project found that homeowners are willing to adjust their energy use based on price signals provided via information technology

468

Smart Grid Publications Archive | Department of Energy  

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

Smart Grid Publications Archive Smart Grid Publications Archive Smart Grid Publications Archive 2010 Smart Grid System Report, February 2012 2009 Smart Grid System Report, July 2009 The Smart Grid Stakeholder Roundtable Group Perspectives (September 2009) Demand Response and Smart Metering Policy Actions Since the Energy Policy Act of 2005: A Summary for State Officials (National Council on Electricity Policy, Fall 2008) Modern Grid Strategy Documents U.S. Climate Change Technology Program Strategic Plan View the "List of Covered Electric Utilities" under the Public Utility Regulatory Policies Act of 1978 (PURPA) as Applicable to "States-Must- Consider" Provisions under the Energy Policy Act of 2005 (EPACT 2005) and Energy Independence and Security Act of 2007 (EISA 2007)

469

Grid Week 2008 | Department of Energy  

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

Grid Week 2008 Grid Week 2008 Grid Week 2008 September 24, 2008 - 3:43pm Addthis Remarks as Prepared for Secretary Bodman Thank you, Guido, for that kind introduction . . . and thank you Kevin for your leadership. You and your team, along with Grid Week's organizing committee and many partners, have done a terrific job putting together this event. I thank you all for being here today. Last year, those of us participating in the first Grid Week joined together to make the case for a concerted national effort to modernize our electrical grid. We challenged the nation to recognize the scale, scope and critical importance of this effort. And this year, we move forward to build a broader consensus to develop and deploy smart grid infrastructure for delivering sustainable energy.

470

Grid Software and Services at NERSC  

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

Services Services Grid Software and Services Overview Grid computing can include a broad range of technologies. At NERSC we are interested in new computational and data-centric services which enhance the productivity of science teams. The grid infrastructure we support (described below) can be used to manage jobs and data in ways that are otherwise difficult from the comamnd line. Grid services enable remote job management, file transfer and distributed computing workflows through the Globus Toolkit. Web based Science Gateways can be built on the foundation provided by those services. Users can access several NERSC resources via Globus grid interfaces using X509 grid certificates. NERSC is part of the Open Science Grid (OSG) and is available to select OSG Virtual Organizations for compute and storage

471

ISGAN Smart Grid Glossary | Open Energy Information  

Open Energy Info (EERE)

ISGAN Smart Grid Glossary ISGAN Smart Grid Glossary Jump to: navigation, search Not seeing a widget? (More info) ISGAN logo.png Smart Grid Glossary The ISGAN Glossary is a project of the International Smart Grid Action Network, a multilateral collaboration between governments to advance the development and deployment of smarter electric grid policies, practices and systems. The Glossary utilizes OpenEI's collaborative, wiki-based platform to collect and organize definitions of smart grid concepts from a variety of high-quality international sources, and to make them freely accessible to policymakers and the public. Add.png Add a Smart Grid definition A LikeLike UnlikeLike You and 3 others like this.3 people like this. Sign Up to see what your friends like. Adaptive Protection Adjacent Balancing Authority

472

Grid Week 2008 | Department of Energy  

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

Grid Week 2008 Grid Week 2008 Grid Week 2008 September 24, 2008 - 3:43pm Addthis Remarks as Prepared for Secretary Bodman Thank you, Guido, for that kind introduction . . . and thank you Kevin for your leadership. You and your team, along with Grid Week's organizing committee and many partners, have done a terrific job putting together this event. I thank you all for being here today. Last year, those of us participating in the first Grid Week joined together to make the case for a concerted national effort to modernize our electrical grid. We challenged the nation to recognize the scale, scope and critical importance of this effort. And this year, we move forward to build a broader consensus to develop and deploy smart grid infrastructure for delivering sustainable energy.

473

Buildings to Grid Integration | Department of Energy  

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

Buildings to Grid Integration Buildings to Grid Integration Buildings to Grid Integration The U.S. Department of Energy is coordinating strategies and activities with companies, individuals, and government entities to address the integration and optimization of buildings with the nation's energy grid. Buildings and the Energy Grid As electricity demand continues to increase, integrating buildings and the electricity grid is a key step to increasing energy efficiency. Intermittent and/or variable generation sources and loads, such as those of electric vehicles, are being installed on the grid in increasing numbers and at more distributed locations. For example, the U.S. government, many states, municipalities, and utility service areas are diversifying and distributing their generation mix, including a larger percentage of

474

Value of a Smart Grid System  

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

2 - 2 - Section 3: Value of a Smart Grid System Implementing a Smart Grid is the effort to move the electric grid from a "static" to a "dynamic" state. Doing so improves the efficiency, reliability and cost-effectiveness of the electrical system's operations, planning and maintenance and creates a system that is interactive with consumers and markets, allowing better energy and dollar savings. Below we summarize the value of the Smart Grid from six perspectives: Consumers Environmental Utilities and Grid Operators Market Efficiency Economy Regulatory Consumer Value of a Smart Grid Smart Grids will provide consumers many benefits, deriving mainly from the increased information and insight it brings them about their individual consumption as

475

Smart Grid Status and Metrics Report Appendices  

SciTech Connect

A smart grid uses digital power control and communication technology to improve the reliability, security, flexibility, and efficiency of the electric system, from large generation through the delivery systems to electricity consumers and a growing number of distributed generation and storage resources. To convey progress made in achieving the vision of a smart grid, this report uses a set of six characteristics derived from the National Energy Technology Laboratory Modern Grid Strategy. The Smart Grid Status and Metrics Report defines and examines 21 metrics that collectively provide insight into the grid’s capacity to embody these characteristics. This appendix presents papers covering each of the 21 metrics identified in Section 2.1 of the Smart Grid Status and Metrics Report. These metric papers were prepared in advance of the main body of the report and collectively form its informational backbone.

Balducci, Patrick J.; Antonopoulos, Chrissi A.; Clements, Samuel L.; Gorrissen, Willy J.; Kirkham, Harold; Ruiz, Kathleen A.; Smith, David L.; Weimar, Mark R.; Gardner, Chris; Varney, Jeff

2014-07-01T23:59:59.000Z

476

Category:Smart Grid Projects - Integrated and Crosscutting Systems | Open  

Open Energy Info (EERE)

Smart Grid Projects - Integrated and Crosscutting Systems Smart Grid Projects - Integrated and Crosscutting Systems Jump to: navigation, search Smart Grid Projects - Integrated and Crosscutting Systems Pages in category "Smart Grid Projects - Integrated and Crosscutting Systems" The following 37 pages are in this category, out of 37 total. B Burbank Water and Power Smart Grid Project C Central Lincoln People's Utility District Smart Grid Project City of Anaheim Smart Grid Project City of Auburn, IN Smart Grid Project City of Fort Collins Utilities Smart Grid Project City of Leesburg, Florida Smart Grid Project City of Naperville, Illinois Smart Grid Project City of Wadsworth, OH Smart Grid Project Cuming County Public Power District Smart Grid Project D Detroit Edison Company Smart Grid Project Duke Energy Business Services LLC Smart Grid Project

477

Transdisciplinary electric power grid science  

E-Print Network (OSTI)

The 20th-century engineering feat that most improved the quality of human life, the electric power system, now faces discipline-spanning challenges that threaten that distinction. So multilayered and complex that they resemble ecosystems, power grids face risks from their interdependent cyber, physical, social and economic layers. Only with a holistic understanding of the dynamics of electricity infrastructure and human operators, automatic controls, electricity markets, weather, climate and policy can we fortify worldwide access to electricity.

Brummitt, Charles D; Dobson, Ian; Moore, Cristopher; D'Souza, Raissa M

2013-01-01T23:59:59.000Z

478

Smart Grid Interoperability Maturity Model  

SciTech Connect

The integration of automation associated with electricity resources (including transmission and distribution automation and demand-side resources operated by end-users) is key to supporting greater efficiencies and incorporating variable renewable resources and electric vehicles into the power system. The integration problems faced by this community are analogous to those faced in the health industry, emergency services, and other complex communities with many stakeholders. To highlight this issue and encourage communication and the development of a smart grid interoperability community, the GridWise Architecture Council (GWAC) created an Interoperability Context-Setting Framework. This "conceptual model" has been helpful to explain the importance of organizational alignment in addition to technical and informational interface specifications for "smart grid" devices and systems. As a next step to building a community sensitive to interoperability, the GWAC is investigating an interoperability maturity model (IMM) based on work done by others to address similar circumstances. The objective is to create a tool or set of tools that encourages a culture of interoperability in this emerging community. The tools would measure status and progress, analyze gaps, and prioritize efforts to improve the situation.

Widergren, Steven E.; Levinson, Alex; Mater, J.; Drummond, R.

2010-04-28T23:59:59.000Z

479

Geodesic flow on three dimensional ellipsoids with equal semi-axes  

E-Print Network (OSTI)

Following on from our previous study of the geodesic flow on three dimensional ellipsoid with equal middle semi-axes, here we study the remaining cases: Ellipsoids with two sets of equal semi-axes with $SO(2) \\times SO(2)$ symmetry, ellipsoids with equal larger or smaller semi-axes with SO(2) symmetry, and ellipsoids with three semi-axes coinciding with SO(3) symmetry. All of these cases are Liouville-integrable, and reduction of the symmetry leads to singular reduced systems on lower-dimensional ellipsoids. The critical values of the energy-momentum maps and their singular fibers are completely classified. In the cases with SO(2) symmetry there are corank 1 degenerate critical points; all other critical points are non-degenreate. We show that in the case with $SO(2) \\times SO(2)$ symmetry three global action variables exist and the image of the energy surface under the energy-momentum map is a convex polyhedron. The case with SO(3) symmetry is non-commutatively integrable, and we show that the fibers over regular points of the energy-casimir map are $T^2$ bundles over $S^2$.

Chris M. Davison; Holger R. Dullin

2006-11-22T23:59:59.000Z

480

SmartGrid Consortium: Smart Grid Roadmap for the State of New York |  

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

SmartGrid Consortium: Smart Grid Roadmap for the State of New York SmartGrid Consortium: Smart Grid Roadmap for the State of New York SmartGrid Consortium: Smart Grid Roadmap for the State of New York Throughout its history, New York State has been a leader in the world of energy generation, distribution, discovery and innovation. With the rapidly evolving industry and the escalating strains being placed on the infrastructure through new technologies and ncreased consumer demands NY is in a position to be a pioneer in modernizing the electric grid. New York is the proud home of key industrial smart grid players including GE and IBM,and it represents an epicenter of major energy research within academia, industry and government. As a world leader in global finance and media, NY is strategically positioned to finance the smart grid

Note: This page contains sample records for the topic "geodesic grid coupled" from the National Library of EnergyBeta (NLEBeta).
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481

A Global Cloud Resolving Model Goals  

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

filtered Vorticity equation (instead of momentum equation) Mass and energy conserving Geodesic grid Z-coordinates (for now...) Geodesic Grid Icosahedron Bisect each edge and...

482

Review of grid connection requirements for generation assets in weak power grids  

Science Journals Connector (OSTI)

Abstract The integration of variable energy sources in weak power grids poses many technical and economic challenges. Both aspects have an impact on the development of grid codes, that is worth analysing. Grid codes shall be adapted to technical constraints in the corresponding power grid, such as the network strength and the characteristics of generation technologies. This paper reviews and compares technical requirements imposed on to generation assets in countries with very distinct characteristics, in order to analyse the influence of weakness and isolation of a power grid on the interconnection conditions imposed by system operators to grid users. Current and future regulation aspects are covered.

Agurtzane Etxegarai; Pablo Eguia; Esther Torres; Araitz Iturregi; Victor Valverde

2015-01-01T23:59:59.000Z

483

Category:Smart Grid Investment Grant Projects | Open Energy Information  

Open Energy Info (EERE)

Investment Grant Projects Investment Grant Projects Pages in category "Smart Grid Investment Grant Projects" The following 98 pages are in this category, out of 98 total. A ALLETE Inc., d/b/a Minnesota Power Smart Grid Project American Transmission Company LLC II Smart Grid Project American Transmission Company LLC Smart Grid Project Atlantic City Electric Company Smart Grid Project Avista Utilities Smart Grid Project B Baltimore Gas and Electric Company Smart Grid Project Black Hills Power, Inc. Smart Grid Project Black Hills/Colorado Electric Utility Co. Smart Grid Project Burbank Water and Power Smart Grid Project C CenterPoint Energy Smart Grid Project Central Lincoln People's Utility District Smart Grid Project Central Maine Power Company Smart Grid Project Cheyenne Light, Fuel and Power Company Smart Grid Project

484

PNNL GridWise | Open Energy Information  

Open Energy Info (EERE)

GridWise GridWise Jump to: navigation, search Logo: GridWise Name GridWise Agency/Company /Organization Pacific Northwest National Laboratory Sector Energy Resource Type Case studies/examples Website http://gridwise.pnl.gov/ Country United States Northern America References Gridwise Vision[1] Contents 1 Overview 2 Highlights 3 Notes 4 References Overview This is a case study of two year-long demonstration projects that tested demand-response concepts. The Grid Friendly Appliance Project demonstrated how household appliances can reduce energy consumption at critical moments when they are fitted with controllers that sense stress on the grid. The Olympic Peninsula Project found that homeowners are willing to adjust their energy use based on price signals provided via information technology

485

Principal Characteristics of a Modern Grid  

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

What is the Smart Grid? What is the Smart Grid? Illinois Smart Grid Initiative Joe Miller - Modern Grid Strategy Team June 3, 2008 1 Conducted by the National Energy Technology Laboratory Funded by the U.S. Department of Energy Office of Electricity Delivery and Energy Reliability 2 Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y 2 What is the role of the MGS? Define a vision for the Modern Grid Reach out to stakeholders to gain consensus Assist in the identification and resolution of barriers & issues Act as "independent broker" consistent with the vision Promote testing of integrated suites of technologies Communicate success stories to stimulate deployment Our role is Strategic rather than Tactical! 3 Office of Electricity

486

ARPA-E: Advancing the Electric Grid  

ScienceCinema (OSTI)

The electric grid was designed with the assumption that all energy generation sources would be relatively controllable, and grid operators would always be able to predict when and where those sources would be located. With the addition of renewable energy sources like wind and solar, which can be installed faster than traditional generation technologies, this is no longer the case. Furthermore, the fact that renewable energy sources are imperfectly predictable means that the grid has to adapt in real-time to changing patterns of power flow. We need a dynamic grid that is far more flexible. This video highlights three ARPA-E-funded approaches to improving the grid's flexibility: topology control software from Boston University that optimizes power flow, gas tube switches from General Electric that provide efficient power conversion, and flow batteries from Harvard University that offer grid-scale energy storage.

Lemmon, John; Ruiz, Pablo; Sommerer, Tim; Aziz, Michael

2014-03-13T23:59:59.000Z

487

Definition: Smart grid | Open Energy Information  

Open Energy Info (EERE)

Smart grid Smart grid Jump to: navigation, search Dictionary.png Smart grid A term used to describe the digital technology that allows for two-way communication between the utility and its customers, and the sensing along the transmission lines, and other technologies that have been (or are planned to be) applied to the existing electric grid. The computer processing, remote control, and automation processes used by the smart grid have been employed by other industries for decades. The technological changes and associated digital devices are beginning to be used both by the electric utilities and by electricity consumers.[1][2] View on Wikipedia Wikipedia Definition View on Reegle Reegle Definition No reegle definition available. Related Terms Electric grid, Electricity generation, transmission

488

OpenEI Community - Smart Grid  

Open Energy Info (EERE)

report from White report from White House outlines largest problems facing United States energy grid http://en.openei.org/community/blog/new-report-white-house-outlines-largest-problems-facing-united-states-energy-grid grid" target="_blank">read more http://en.openei.org/community/blog/new-report-white-house-outlines-largest-problems-facing-united-states-energy-grid#comments energy grid OpenEI President Smart Grid United States White House Fri, 16

489

ARPA-E: Advancing the Electric Grid  

SciTech Connect

The electric grid was designed with the assumption that all energy generation sources would be relatively controllable, and grid operators would always be able to predict when and where those sources would be located. With the addition of renewable energy sources like wind and solar, which can be installed faster than traditional generation technologies, this is no longer the case. Furthermore, the fact that renewable energy sources are imperfectly predictable means that the grid has to adapt in real-time to changing patterns of power flow. We need a dynamic grid that is far more flexible. This video highlights three ARPA-E-funded approaches to improving the grid's flexibility: topology control software from Boston University that optimizes power flow, gas tube switches from General Electric that provide efficient power conversion, and flow batteries from Harvard University that offer grid-scale energy storage.

Lemmon, John; Ruiz, Pablo; Sommerer, Tim; Aziz, Michael

2014-02-24T23:59:59.000Z

490

Microsoft Word - Grid Energy Storage December 2013  

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

Grid Energy Storage Grid Energy Storage U.S. Department of Energy December 2013 Acknowledgements We would like to acknowledge the members of the core team dedicated to developing this report on grid energy storage: Imre Gyuk (OE), Mark Johnson (ARPA-E), John Vetrano (Office of Science), Kevin Lynn (EERE), William Parks (OE), Rachna Handa (OE), Landis Kannberg (PNNL), Sean Hearne & Karen Waldrip (SNL), Ralph Braccio (Booz Allen Hamilton). 2 Table of Contents Acknowledgements ....................................................................................................................................... 1 Executive Summary ....................................................................................................................................... 4

491

Article on the Grid Tech Team's Strategic Plan for Grid Modernization Now  

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

Article on the Grid Tech Team's Strategic Plan for Grid Article on the Grid Tech Team's Strategic Plan for Grid Modernization Now Available Article on the Grid Tech Team's Strategic Plan for Grid Modernization Now Available January 11, 2013 - 4:10pm Addthis A new article by OE's Kerry Cheung, William Parks and Anjan Bose in IEEE's Smart Grid newsletter describes the Department of Energy's strategic plan to achieve a future electricity system that will be cost-effective, seamless from generation to end-use, and capable of meeting all clean energy demands and capacity requirements. Developed by DOE's Grid Tech Team (GTT), the proposed strategy recognizes the diversity and uncertainty of future energy demands and generation portfolios, the inherent regional differences in needs, goals and resources, and the critical importance of continued dialogue and engagement with appropriate

492

Now Available: Smart Grid Investments Improve Grid Reliability, Resilience, and Storm Responses (November 2014)  

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

A new report from OE's Smart Grid Investment Grant (SGIG) program presents findings on smart grid improvements in outage management, based on the recent experiences of three SGIG projects.

493

From Coarse Grid to Mini-Grid to Gridless: How Much can Gridless Help Contentionless?  

Science Journals Connector (OSTI)

We study the benefit of gridless wavelength assignment. An efficient spectrum assignment algorithm is developed. It is found a mini-grid case with a certain grid granularity performs...

Shen, Gangxiang; Yang, Qi

494

From SHS to Mini-Grid-Based Off-Grid Electrification: A Case Study of Bangladesh  

Science Journals Connector (OSTI)

This chapter presents a local-level study of a village off-grid system in Bangladesh. Using the recent census ... methodology that identifies the demand in the off-grid village context using six alternative scena...

Subhes C. Bhattacharyya

2014-01-01T23:59:59.000Z

495

Platform for a modern grid: customer engagement  

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

stories engaging the customer when deploying new technologies in the nation's largest smart grid demonstration. Related Articles (by tag) NWPPA spotlights synchrophasors,...

496

Case Study - EPB Smart Grid Investment Grant  

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

EPB Smart Grid Investment Grant 1 Smart switches installed in EPB service territory A Smarter Electric Circuit: Electric Power Board of Chattanooga Makes the Switch EPB of...

497

Sandia National Laboratories: Distribution Grid Integration  

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

Current switches have been inefficient and ... ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration,...

498

Power grid simulation, evaluation, and test framework.  

E-Print Network (OSTI)

??The Virtual Power System Testbed (VPST) at the University of Illinois at Urbana-Champaign is part of the Trustworthy Cyber Infrastructure for the Power Grid (TCIP)… (more)

Bergman, David C.

2010-01-01T23:59:59.000Z

499

Power grid integration using Kalman filtering.  

E-Print Network (OSTI)

?? Renewable power sources with a relatively uneven or constant DC power production require synchronization methods to work with the current utility power grid. The… (more)

Djerf, Magnus

2012-01-01T23:59:59.000Z

500

Effects of grids in drift tubes  

SciTech Connect

In 2011, we upgraded a 201 MHz buncher in the proton injector for the alternating gradient synchrotron (AGS) - relativistic heavy ion collider (RHIC) complex. In the buncher we installed four grids made of tungsten to improve the transit time factor. The grid installed drift tubes have 32 mm of inner diameter and the each grid consists of four quadrants. The quadrants were cut out precisely from 1mm thick tungsten plates by a computerized numerically controlled (CNC) wire cutting electrical discharge machining (EDM). The 3D electric field of the grid was simulated.

Okamura M.; Yamauchi, H.

2012-05-20T23:59:59.000Z